J. J. Keller® Compliance Network Logo
Start Experiencing Compliance Network for Free!
Update to Professional Trial!

Be Part of the Ultimate Safety & Compliance Community

Trending news, knowledge-building content, and more – all personalized to you!

Already have an account?
FREE TRIAL UPGRADE!
Thank you for investing in EnvironmentalHazmat related content. Click 'UPGRADE' to continue.
CANCEL
YOU'RE ALL SET!
Enjoy your limited-time access to the Compliance Network!
A confirmation welcome email has been sent to your email address from ComplianceNetwork@t.jjkellercompliancenetwork.com. Please check your spam/junk folder if you can't find it in your inbox.
YOU'RE ALL SET!
Thank you for your interest in EnvironmentalHazmat related content.
WHOOPS!
You've reached your limit of free access, if you'd like more info, please contact us at 800-327-6868.
You'll also get exclusive access to:
TRY IT FREE TODAY
Already have an account? .

When forklifts and pedestrians cross paths, who has the right of way? One company says employees, while others say the forklift. Regardless of who your company policy says should have priority, when someone isn’t paying attention can lead to a disastrous situation and call to OSHA. One effective method of minimizing an accident risk is implementing “Stop-Look-Go” at intersections. This is where both forklift operators and pedestrians stop at each intersection to look both ways before proceeding.

Stop: Come to a controlled stop before reaching the intersection.

Look: Look around to ensure the path is clear. If not, make eye and verbal contact with the driver or pedestrian to ensure they see you. Both parties must know who is going and who is stopping. Go: Proceed with caution while still watching out for others.

OSHA requires that companies mark their forklift and pedestrian paths. One way to increase the effectiveness of this method is to ensure that the pathways are well-marked as pedestrian paths and mark the intersections with a different color or pattern. For example, a yellow pathway could use black and yellow stripes to indicate extra caution is needed in this area.

Avoid distractions when traveling through areas with forklifts and other pedestrians, such as cell phones and loud music.

Use mirrors to increase visibility around blind spots and corners.

Ensure employees understand the impacts of working with and around forklifts. Highlight the dangers.

Keep conversations to a minimum when working on and around forklifts.

Key to remember: Stop-Look-Go is a simple method that encourages forklift operators and pedestrians to be on the lookout for each other. It increases employee awareness of hazards when traveling in and around the facility.

Specialized Industries

Go beyond the regulations! Visit the Institute for in-depth guidance on a wide range of compliance subjects in safety and health, transportation, environment, and human resources.

J. J. Keller® COMPLIANCE NETWORK is a premier online safety and compliance community, offering members exclusive access to timely regulatory content in workplace safety (OSHA), transportation (DOT), environment (EPA), and human resources (DOL).

Interact With Our Compliance Experts

Puzzled by a regulatory question or issue? Let our renowned experts provide the answers and get your business on track to full compliance!

Upcoming Events

Reference the Compliance Network Safety Calendar to keep track of upcoming safety and compliance events. Browse by industry or search by keyword to see relevant dates and observances, including national safety months, compliance deadlines, and more.

SAFETY & COMPLIANCE NEWS

Keep up to date on the latest developments affecting OSHA, DOT, EPA, and DOL regulatory compliance.

RegSense®Regulatory Reference

Explore a comprehensive database of word-for-word regulations and best practices on a wide range of topics.

THE J. J. KELLER INSTITUTE

The J. J. Keller INSTITUTE is your destination for in-depth content on hundreds of topics. Browse by subject to gain foundational knowledge and confirm best practices on the topics that matter to you. You'll find articles, videos, and interactive exercises that help you become an expert and apply key concepts in practical scenarios. There are almost 130 subjects covering 100s of topics.

Add Premium Hazmat & Environmental Resources

Unlock premium content offering expert insight into hazmat and environmental regulations with a COMPLIANCE NETWORK EDGE membership.

INTERACT WITH A COMPLIANCE EXPERT

In search of an answer? Try our FAQ Library or engage with an Expert for help!

Upcoming Events

Reference the Compliance Network Safety Calendar to keep track of upcoming safety and compliance events. Browse by industry or search by keyword to see relevant dates and observances, including national safety months, compliance deadlines, and more.

Most Recent Highlights In Environmental

EHS Monthly Round Up - April 2024

EHS Monthly Round Up - April 2024

In this monthly roundup video, we’ll review the most impactful environmental, safety, and health news.

Hi everyone! Welcome to the monthly news roundup video, where we’ll go over the most impactful environmental, health, and safety news. Please view the content links in the transcript for more information about the topics I’ll be covering today. Let’s get started!

OSHA’s worker walkaround rule takes effect May 31st. It expands the criteria for who employees can authorize to act as their representative during an inspection.

Between 2015 and 2022, there were about 1,500 worker injuries involving food processing machinery. A new OSHA alert raises awareness of these hazards. It addresses hazard recognition, corrective measures, and workers’ rights.

The National Institute for Occupational Safety and Health (NIOSH) seeks stakeholder input on protecting outdoor workers from wildfire smoke. The agency intends to develop a hazard review document that provides recommendations to protect workers.

The Mine Safety and Health Administration published a final rule that lowers miners’ exposure to silica dust. It also revises the standard to reflect the latest advances in respiratory protection and practices.

OSHA released 2023 injury and illness data. The agency provides public access to this information in an effort to identify unsafe conditions and workplace hazards that may lead to injuries and illnesses.

And turning to environmental news, EPA finalized a rule to designate two widely used PFAS as hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act, or CERCLA. The rule requires immediate release notifications for the two PFAS. It also gives EPA the authority to hold polluters responsible for contamination.

Thanks for tuning in to the monthly news roundup. We’ll see you next month!

EHS Monthly Round Up - March 2024

EHS Monthly Round Up - March 2024

In this monthly roundup video, we’ll review the most impactful environmental, safety, and health news.

Hi everyone! Welcome to the monthly news roundup video, where we’ll go over the most impactful environmental, health, and safety news. Please view the content links in the transcript for more information about the topics I’ll be covering today. Let’s get started! The Office of Management and Budget completed its review of OSHA’s worker walkaround final rule on March 20. The next step is publication in the Federal Register. The rule expands the criteria for who employees can authorize to act as their representative during an OSHA inspection.

Stand Up 4 Grain Safety Week was held the week of March 25. This annual event brings attention to hazards in the grain handling and storage industry and encourages employers to focus on safe work practices.

Over 100 people die in ladder-related deaths each year, and thousands more suffer disabling injuries. During Ladder Safety Month, which is held each March, the American Ladder Institute promotes ladder safety to decrease the number of injuries and fatalities.

Between 2010 and 2023, 11 miners drowned in incidents involving submerged mobile equipment. In response, the Mine Safety and Health Administration issued a safety alert. It recommends measures miners should take when operating equipment near water.

And finally, turning to environmental news, EPA finalized amendments to its Risk Management Program in an effort to improve safety at facilities that use and distribute hazardous chemicals. The rule seeks to improve chemical process safety; assist in planning for, preparing for, and responding to accidents; and increase public awareness of chemical hazards at regulated sites.

Thanks for tuning in to the monthly news roundup. We’ll see you next month!

2024-05-08T05:00:00Z

EPA Final Rule: Hazardous and Solid Waste Management System: Disposal of CCRs

On April 17, 2015, the Environmental Protection Agency (EPA or the Agency) promulgated national minimum criteria for existing and new coal combustion residuals (CCR) landfills and existing and new CCR surface impoundments. On August 21, 2018, the United States Court of Appeals for the District of Columbia Circuit vacated the exemption for inactive surface impoundments at inactive facilities (legacy CCR surface impoundments) and remanded the issue back to EPA to take further action consistent with its opinion in Utility Solid Waste Activities Group, et al. v. EPA. This action responds to that order and establishes regulatory requirements for legacy CCR surface impoundments. EPA is also establishing requirements for CCR management units at active CCR facilities and at inactive CCR facilities with a legacy CCR surface impoundment. Finally, EPA is making several technical corrections to the existing regulations, such as correcting certain citations and harmonizing definitions.

DATES: This final rule is effective on November 4, 2024, published in the Federal Register May 8, 2024, page 38950.

View final rule.

2024-05-08T05:00:00Z

EPA Final Rule: NESHAP for Gasoline Distribution Facilities

The Environmental Protection Agency (EPA) is finalizing the technology reviews (TR) conducted for the national emission standards for hazardous air pollutants (NESHAP) for gasoline distribution facilities and the review of the new source performance standards (NSPS) for bulk gasoline terminals pursuant to the requirements of the Clean Air Act (CAA). The final NESHAP amendments include revised requirements for storage vessels, loading operations, and equipment to reflect cost-effective developments in practices, processes, or controls. The final NSPS reflect the best system of emission reduction for loading operations and equipment leaks. In addition, the EPA is: finalizing revisions related to emissions during periods of startup, shutdown, and malfunction (SSM); adding requirements for electronic reporting; revising monitoring and operating requirements for control devices; and making other minor technical improvements. The EPA estimates that this final action will reduce hazardous air pollutant emissions from gasoline distribution facilities by over 2,200 tons per year (tpy) and volatile organic compound (VOC) emissions by 45,400 tpy.

DATES: The final rule is effective July 8, 2024, published in the Federal Register May 8, 2024, page 39304.

View final rule.

2024-05-08T05:00:00Z

EPA Final Rule: Designation of PFOA and PFOS as CERCLA Hazardous Substances

Pursuant to the Comprehensive Environmental Response, Compensation, and Liability Act (“CERCLA” or “Superfund”), the Environmental Protection Agency (EPA) is designating two per- and polyfluoroalkyl substances (PFAS)—perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), including their salts and structural isomers—as hazardous substances. The Agency reached this decision after evaluating the available scientific and technical information about PFOA and PFOS and determining that they may present a substantial danger to the public health or welfare or the environment when released. The Agency also determined that designation is warranted based on a totality of the circumstances analysis, including an analysis of the advantages and disadvantages of designation.

DATES: Effective July 8, 2024, published in the Federal Register May 8, 2024, page 39124.

View final rule.

§302.4 Hazardous substances and reportable quantities.
Note II to Table 302.4Revised View text
Table 302.4, entries ‘‘Perfluorooctanesulfonic acid, salts, & structural isomersv’’, ‘‘Perfluorooctanesulfonic acidv’’, Perfluorooctanoic acid, salts, & structural isomersv’’, and ‘‘Perfluorooctanoic acidv’’;AddedView text
Appendix A to §302.4—Sequential CAS Registry Number List of CERCLA Hazardous Substances
Entries for “335-67-1” and “1763-23-1”AddedView text

New Text

§302.4 Hazardous substances and reportable quantities.

* * * * *

Note II to Table 302.4

Hazardous substances are given a Statutory Code based on their statutory source. The “Statutory Code” column indicates the statutory source for designating each substance as a CERCLA hazardous substance. Statutory Code “1” indicates a Clean Water Act (CWA) Hazardous Substance [40 CFR 116.4; 33 U.S.C. 1321(b)(2)(A)]. Statutory Code “2” indicates a CWA Toxic Pollutant [40 CFR 401.15, 40 CFR part 423 Appendix A, and/or 40 CFR 131.36; 33 U.S.C. 1317(a)]. Statutory Code “3” indicates a CAA HAP [42 U.S.C. 7412(b); Pub. L. 101-549 November 15, 1990; 70 FR 75047 December 19, 2005; 69 FR 69320 November 29, 2004; 61 FR 30816 June 18, 1996; 65 FR 47342 August 2, 2000; 87 FR 393 January 5, 2022]. Statutory Code “4” indicates Resource Conservation and Recovery Act (RCRA) Hazardous Wastes [40 CFR part 261 Subpart D—Lists of Hazardous Wastes; 42 U.S.C. 6921]. (Note: The “RCRA waste No.” column provides the waste identification numbers assigned by RCRA regulations). Statutory Code “5” indicates a hazardous substance designated under section 102(a) of CERCLA. The “Final RQ [pounds (kg)]” column provides the reportable quantity for each hazardous substance in pounds and kilograms.

* * * * *

See More

Most Recent Highlights In Transportation

2024-05-07T05:00:00Z

EPA Final Rule: Amendments to NESHAP forCoal- and Oil-Fired Electric Utility Steam Generating Units

This action finalizes amendments to the national emission standards for hazardous air pollutants (NESHAP) for the Coal- and Oil-Fired Electric Utility Steam Generating Units (EGUs) source category. These final amendments are the result of the EPA's review of the 2020 Residual Risk and Technology Review (RTR). The changes, which were proposed under the technology review in April 2023, include amending the filterable particulate matter (fPM) surrogate emission standard for non-mercury metal hazardous air pollutants (HAP) for existing coal-fired EGUs, the fPM emission standard compliance demonstration requirements, and the mercury (Hg) emission standard for lignite-fired EGUs. Additionally, the EPA is finalizing a change to the definition of “startup.” The EPA did not propose, and is not finalizing, any changes to the 2020 Residual Risk Review.

DATES:

This final rule is effective on July 8, 2024, published in the Federal Register May 7, 2024, page 38508.

View final rule.

Top RCRA permit FAQs answered
2024-05-06T05:00:00Z

Top RCRA permit FAQs answered

In an ever-changing world, one thing that remains consistent is the need for permits. They’re required to conduct all sorts of activities, like parking in a restricted area, operating a business, and (the focus of this article) managing hazardous waste.

Permitting programs are one way the Environmental Protection Agency (EPA) ensures facilities comply with environmental statutes. The agency recently launched epa.gov/permits, a web-based platform that centralizes information about the agency’s federal environmental permit programs, including the Resource Conservation and Recovery Act (RCRA) Subtitle C Permit that’s required to treat, store, and dispose of hazardous waste.

Like EPA’s new permit platform, we want to offer a helpful starting point for navigating RCRA permit requirements. Get answers to five of the most frequently asked questions about RCRA permits.

Does my facility need a RCRA permit?

All facilities that currently or plan to treat, store, and/or dispose of hazardous wastes (identified or listed at 40 CFR Part 261) must obtain a RCRA permit.

These treatment, storage, and disposal facilities (TSDFs) may not operate without a permit unless the facility is exempt and meets specific regulatory conditions. Generally, exempt entities include:

  • Businesses that generate and store for short periods of time hazardous waste and then transport it off-site,
  • Hazardous waste transporters, and
  • Entities that conduct containment activities during immediate emergency responses.

See 270.1 for all exceptions and exemptions.

What’s in a RCRA permit?

The RCRA permit is a legally binding document that establishes the waste management activities a facility may conduct and the conditions under which it may conduct the activities. The permit lists:

  • The applicable federal regulations of Parts 260–270, including:
    • Facility design and operation,
    • Safety standards, and
    • Facility performance activities (such as monitoring and reporting).
  • The applicable state regulations, and
  • Facility-specific requirements (like groundwater monitoring).

Do I need a federal or state RCRA permit?

RCRA permits are issued either by an EPA regional office or the state.

Authorized states implement and enforce hazardous waste management programs with standards at least as stringent as the federal rules. Note that EPA maintains its enforcement authorities over state programs. If your facility is in an authorized state that can address all provisions, apply for a state RCRA permit.

However, some states aren’t authorized to address all permit provisions, so EPA must address the unauthorized provisions. In this case, apply for a joint RCRA permit from the state and EPA.

If your facility is in an unauthorized state or territory, apply for a federal RCRA permit through the regional EPA office.

Check with your state to determine whether it’s in an authorized state and, if so, whether you need a state or joint RCRA permit. EPA lists links to state hazardous waste permit programs.

What’s a standardized RCRA permit?

Designed to streamline the permitting process, a standardized RCRA permit reduces application requirements. The permit includes a uniform portion and may also have a supplemental portion, added at the discretion of EPA or the authorized state.

Standardized permits (regulated under Part 270 Subpart J) may be issued to TSDFs that:

  • Generate hazardous waste and then store or nonthermally treat the hazardous waste on-site in (a) containers, (b) tanks, or (c) containment buildings; or
  • Receive hazardous waste generated off-site by a generator under the same ownership and then store or nonthermally treat the hazardous waste in (a) containers, (b) tanks, or (c) containment buildings.

What’s the general RCRA permit process?

The overall RCRA permit process at the federal level consists of six phases:

  1. The business holds a pre-application meeting with the public.
  2. The business applies for a RCRA permit.
  3. The permitting agency shares the application for public review and begins its internal review.
  4. The permitting agency issues Notices of Deficiency to the facility if information is missing until the application is complete.
  5. The permitting agency makes a preliminary decision to issue or deny the permit and shares a draft of its decision (a draft permit or notice of intent to deny) for public comment.
  6. The permitting agency either issues a final permit or denies the permit.

RCRA permits are typically effective for 10 years, but EPA can issue a permit for a shorter duration. TSDFs must receive a permit before beginning construction of a new facility. Permitted TSDFs must submit a new RCRA permit application at least six months before the current permit expires.

Remember to check state regulations for any stricter standards and differing processes.

Key to remember: Any facility that currently or plans to store, treat, or dispose of regulated hazardous waste must have a RCRA permit.

2024-05-03T05:00:00Z

EPA Final Rule: Procedures for Chemical Risk Evaluation Under TSCA

The Environmental Protection Agency (EPA or the Agency) is finalizing amendments to the procedural framework rule for conducting risk evaluations under the Toxic Substances Control Act (TSCA). The purpose of risk evaluations under TSCA is to determine whether a chemical substance presents an unreasonable risk of injury to health or the environment, without consideration of costs or non-risk factors, including unreasonable risk to potentially exposed or susceptible subpopulations identified as relevant to the risk evaluation by EPA, under the conditions of use. EPA reconsidered the procedural framework rule for conducting such risk evaluations and is revising certain aspects of that framework to better align with the statutory text and applicable court decisions, to reflect the Agency's experience implementing the risk evaluation program following enactment of the 2016 TSCA amendments, and to allow for consideration of future scientific advances in the risk evaluation process without need to further amend the Agency's procedural rule.

DATES: This final rule is effective on July 2, 2024, published in the Federal Register May 3, 2024, page 37028.

View final rule.

Subpart B—Procedures for Chemical Substance Risk Evaluations
Entire subpart Revised View text

New Text

Subpart B—Procedures for Chemical Substance Risk Evaluations

§702.31 General provisions.

(a) Purpose. This subpart establishes the EPA process for conducting a risk evaluation to determine whether a chemical substance presents an unreasonable risk of injury to health or the environment as required under TSCA section 6(b)(4)(B) (15 U.S.C. 2605(b)(4)(B)).

(b) Scope. These regulations establish the general procedures, key definitions, and timelines EPA will use in a risk evaluation conducted pursuant to TSCA section 6(b) (15 U.S.C. 2605(b)).

(c) Applicability. The requirements of this part apply to all chemical substance risk evaluations initiated pursuant to TSCA section 6(b) (15 U.S.C. 2605(b)) beginning June 3, 2024. For risk evaluations initiated prior to this date, but not yet finalized, EPA will seek to apply the requirements in this subpart to the extent practicable. These requirements shall not apply retroactively to risk evaluations already finalized.

(d) Categories of chemical substances. Consistent with EPA's authority to take action with respect to categories of chemicals under 15 U.S.C. 2625(c), all references in this part to “chemical” or “chemical substance” shall also apply to “a category of chemical substances.”

§702.33 Definitions.

All definitions in TSCA apply to this subpart. In addition, the following definitions apply:

Act means the Toxic Substances Control Act (TSCA), as amended (15 U.S.C. 2601 et seq.).

Aggregate exposure means the combined exposures from a chemical substance across multiple routes and across multiple pathways.

Conditions of use means the circumstances, as determined by the Administrator, under which a chemical substance is intended, known, or reasonably foreseen to be manufactured, processed, distributed in commerce, used, or disposed of.

EPA means the U.S. Environmental Protection Agency.

Pathways means the physical course a chemical substance takes from the source to the organism exposed.

Potentially exposed or susceptible subpopulation means a group of individuals within the general population identified by EPA who, due to either greater susceptibility or greater exposure, may be at greater risk than the general population of adverse health effects from exposure to a chemical substance or mixture, such as infants, children, pregnant women, workers, the elderly, or overburdened communities.

Reasonably available information means information that EPA possesses or can reasonably generate, obtain, and synthesize for use in risk evaluations, considering the deadlines specified in TSCA section 6(b)(4)(G) for completing such evaluation. Information that meets the terms of the preceding sentence is reasonably available information whether or not the information is confidential business information, that is protected from public disclosure under TSCA section 14.

Routes means the ways a chemical substance enters an organism after contact, e.g., by ingestion, inhalation, or dermal absorption.

Sentinel exposure means the exposure from a chemical substance that represents the plausible upper bound of exposure relative to all other exposures within a broad category of similar or related exposures.

Uncertainty means the imperfect knowledge or lack of precise knowledge of the real world either for specific values of interest or in the description of the system.

Variability means the inherent natural variation, diversity, and heterogeneity across time and/or space or among individuals within a population.

§702.35 Chemical substances subject to risk evaluation.

(a) Chemical substances undergoing risk evaluation. A risk evaluation for a chemical substance designated by EPA as a High-Priority Substance pursuant to the prioritization process described in subpart A or initiated at the request of a manufacturer or manufacturers under §702.45, will be conducted in accordance with this part, subject to §702.31(c).

(b) Percentage requirements. Pursuant to 15 U.S.C. 2605(b)(4)(E)(i) and in accordance with §702.45(j)(1), EPA will ensure that the number of chemical substances for which a manufacturer-requested risk evaluation is initiated pursuant to §702.45(e)(9) is not less than 25%and not more than 50% of the number of chemical substances for which a risk evaluation was initiated upon designation as a High-Priority Substance under subpart A.

(c) Manufacturer-requested risk evaluations for work plan chemical substances. Manufacturer requests for risk evaluations, described in paragraph (a) of this section, for chemical substances that are drawn from the 2014 update of the TSCA Work Plan for Chemical Assessments will be granted at the discretion of EPA. Such evaluations are not subject to the percentage requirements in paragraph (b) of this section.

§702.37 Evaluation requirements.

(a) Considerations.(1) EPA will use applicable EPA guidance when conducting risk evaluations, as appropriate and where it represents the best available science.

(2) EPA will document that the risk evaluation is consistent with the best available science and based on the weight of the scientific evidence. In determining best available science, EPA shall consider as applicable:

(i) The extent to which the scientific information, technical procedures, measures, methods, protocols, methodologies, or models employed to generate the information are reasonable for and consistent with the intended use of the information;

(ii) The extent to which the information is relevant for the Administrator's use in making a decision about a chemical substance or mixture;

(iii) The degree of clarity and completeness with which the data, assumptions, methods, quality assurance, and analyses employed to generate the information are documented;

(iv) The extent to which the variability and uncertainty in the information, or in the procedures, measures, methods, protocols, methodologies, or models, are evaluated and characterized; and

(v) The extent of independent verification or peer review of the information or of the procedures, measures, methods, protocols, methodologies or models.

(3) EPA will ensure that all supporting analyses and components of the risk evaluation are suitable for their intended purpose, and tailored to the problems and decision at hand, in order to inform the development of a technically sound determination as to whether a chemical substance presents an unreasonable risk of injury to health or the environment under the conditions of use, based on the weight of the scientific evidence.

(4) EPA will not exclude conditions of use from the scope of the risk evaluation, but a fit-for-purpose approach may result in varying types and levels of analysis and supporting information for certain conditions of use, consistent with paragraph (b) of this section. The extent to which EPA will refine its evaluations for one or more condition of use in any risk evaluation will vary as necessary to determine whether a chemical substance presents an unreasonable risk of injury to health or the environment.

(5) EPA will evaluate chemical substances that are metals or metal compounds in accordance with 15 U.S.C. 2605(b)(2)(E).

(b) Information and information sources.(1) EPA will base each risk evaluation on reasonably available information.

(2) EPA will apply systematic review methods to assess reasonably available information, as needed to carry out risk evaluations that meet the requirements in TSCA section 26(h) and (i), in a manner that is objective, unbiased, and transparent.

(3) EPA may determine that certain information gaps can be addressed through application of assumptions, uncertainty factors, models, and/or screening to conduct its analysis with respect to the chemical substance, consistent with 15 U.S.C. 2625. The approaches used will be determined by the quality of reasonably available information, the deadlines specified in TSCA section 6(b)(4)(G) for completing the risk evaluation, and the extent to which the information reduces uncertainty.

(4) EPA expects to use its authorities under the Act, and other information gathering authorities, when necessary to obtain the information needed to perform a risk evaluation for a chemical substance before initiating the risk evaluation for such substance. EPA will also use such authorities during the performance of a risk evaluation to obtain information as needed and on a case-by-case basis to ensure that EPA has adequate, reasonably available information to perform the evaluation. Where appropriate, to the extent practicable, and scientifically justified, EPA will require the development of information generated without the use of new testing on vertebrates.

(5) Among other sources of information, EPA will also consider information and advice provided by the Science Advisory Committee on Chemicals established pursuant to 15 U.S.C. 2625(o).

§702.39 Components of risk evaluation.

(a) In general. Each risk evaluation will include all of the following components:

(1) A Scope;

(2) A Hazard Assessment;

(3) An Exposure Assessment;

(4) A Risk Characterization; and

(5) A Risk Determination.

(b) Scope of the risk evaluation. The scope of the risk evaluation will include all the following:

(1) The condition(s) of use the EPA expects to consider in the risk evaluation.

(2) The potentially exposed populations, including any potentially exposed or susceptible subpopulations as identified as relevant to the risk evaluation by EPA under the conditions of use that EPA plans to evaluate.

(3) The ecological receptors that EPA plans to evaluate.

(4) The hazards to health and the environment that EPA plans to evaluate.

(5) A description of the reasonably available information and scientific approaches EPA plans to use in the risk evaluation.

(6) A conceptual model that describes the actual or predicted relationships between the chemical substance, its associated conditions of use through predicted exposure scenarios, and the identified human and environmental receptors and human and ecological health hazards.

(7) An analysis plan that includes hypotheses and descriptions about the relationships identified in the conceptual model and the approaches and strategies EPA intends to use to assess exposure and hazard effects, and to characterize risk; and a description, including quality, of the data, information, methods, and models, that EPA intends to use in the analysis and how uncertainty and variability will be characterized.

(8) EPA's plan for peer review consistent with §702.41.

(c) Hazard assessment.(1) The hazard assessment process includes the identification, evaluation, and synthesis of information to describe the potential health and environmental hazards of the chemical substance under the conditions of use.

(2) Hazard information related to potential health and environmental hazards of the chemical substance will be reviewed in a manner consistent with best available science based on the weight of scientific evidence and all assessment methods will be documented.

(3) Consistent with §702.37(b), information evaluated may include, but would not be limited to: Human epidemiological studies, in vivo and/or in vitro laboratory studies, biomonitoring and/or human clinical studies, ecological field data, read across, mechanistic and/or kinetic studies in a variety of test systems. These may include but are not limited to: toxicokinetics and toxicodynamics (e.g., physiological-based pharmacokinetic modeling), and computational toxicology (e.g., high-throughput assays, genomic response assays, data from structure-activity relationships, in silico approaches, and other health effects modeling).

(4) The hazard information relevant to the chemical substance will be evaluated for identified human and environmental receptors, including all identified potentially exposed or susceptible subpopulation(s) determined to be relevant, for the exposure scenarios relating to the conditions of use.

(5) The relationship between the dose of the chemical substance and the occurrence of health and environmental effects or outcomes will be evaluated.

(6) Hazard identification will include an evaluation of the strengths, limitations, and uncertainties associated with the reasonably available information.

(d) Exposure assessment.(1) Where relevant, the likely duration, intensity, frequency, and number of exposures under the conditions of use will be considered.

(2) Exposure information related to potential human health or ecological hazards of the chemical substance will be reviewed in a manner consistent with best available science based on the weight of scientific evidence and all assessment methods will be documented.

(3) Consistent with §702.37(b), information evaluated may include, but would not be limited to: chemical release reports, release or emission scenarios, data and information collected from monitoring or reporting, release estimation approaches and assumptions, biological monitoring data, workplace monitoring data, chemical exposure health data, industry practices with respect to occupational exposure control measures, and exposure modeling.

(4) Chemical-specific factors, including, but not limited to physical-chemical properties and environmental fate and transport parameters, will be examined.

(5) The human health exposure assessment will consider all potentially exposed or susceptible subpopulation(s) determined to be relevant.

(6) Environmental health exposure assessment will characterize and evaluate the interaction of the chemical substance with the ecological receptors and the exposures considered, including populations and communities, depending on the chemical substance and the ecological characteristic involved.

(7) EPA will describe whether sentinel exposures under the conditions of use were considered and the basis for their consideration.

(8) EPA will consider aggregate exposures to the chemical substance, and, when supported by reasonably available information, consistent with the best available science and based on the weight of scientific evidence, include an aggregate exposure assessment in the risk evaluation, or will otherwise explain in the risk evaluation the basis for not including such an assessment.

(9) EPA will assess all exposure routes and pathways relevant to the chemical substance under the conditions of use, including those that are regulated under other federal statutes.

(e) Risk characterization.(1) Requirements. To characterize the risks from the chemical substance, EPA will:

(i) Integrate the hazard and exposure assessments into quantitative and/or qualitative estimates relevant to specific risks of injury to health or the environment, including any potentially exposed or susceptible subpopulations identified, under the conditions of use;

(ii) Not consider costs or other non-risk factors; and

(iii) Describe the weight of the scientific evidence for the identified hazards and exposures.

(2) Summary of considerations. EPA will summarize, as applicable, the considerations addressed throughout the evaluation components, in carrying out the obligations under 15 U.S.C. 2625(h). This summary will include, as appropriate, a discussion of:

(i) Considerations regarding uncertainty and variability. Information about uncertainty and variability in each step of the risk evaluation (e.g., use of default assumptions, scenarios, choice of models, and information used for quantitative analysis) will be integrated into an overall characterization and/or analysis of the impact of the uncertainty and variability on estimated risks. EPA may describe the uncertainty using a qualitative assessment of the overall strength and limitations of the data and approaches used in the assessment.

(ii) Considerations of data quality. A discussion of data quality (e.g., reliability, relevance, and whether methods employed to generate the information are reasonable for and consistent with the intended use of the information), as well as assumptions used, will be included to the extent necessary. EPA also expects to include a discussion of the extent of independent verification or peer review of the information or of the procedures, measures, methods, protocols, methodologies, or models used in the risk evaluation.

(iii) Considerations of alternative interpretations. If appropriate and relevant, where alternative interpretations are plausible, a discussion of alternative interpretations of the data and analyses will be included.

(iv) Additional considerations for environmental risk. For evaluation of environmental risk, it may be necessary to discuss the nature and magnitude of the effects, the spatial and temporal patterns of the effects, implications at the individual, species, population, and community level, and the likelihood of recovery subsequent to exposure to the chemical substance.

(f) Risk determination.(1) As part of the risk evaluation, EPA will make a single determination as to whether the chemical substance presents an unreasonable risk of injury to health or the environment, without consideration of costs or other non-risk factors, including an unreasonable risk to a potentially exposed or susceptible subpopulation, under the conditions of use.

(2) In determining whether unreasonable risk is presented, EPA's consideration of occupational exposure scenarios will take into account reasonably available information, including known and reasonably foreseen circumstances where subpopulations of workers are exposed due to the absence or ineffective use of personal protective equipment. EPA will not consider exposure reduction based on assumed use of personal protective equipment as part of the risk determination.

(3) EPA will determine whether a chemical substance does or does not present an unreasonable risk after considering the risks posed under the conditions of use and, where EPA makes a determination of unreasonable risk, EPA will identify the conditions of use that significantly contribute to such determination.

§702.41 Peer review.

EPA will conduct peer review activities on risk evaluations conducted pursuant to 15 U.S.C. 2605(b)(4)(A). EPA expects such activities, including decisions regarding the appropriate scope and type of peer review, to be consistent with the applicable peer review policies, procedures, and methods in guidance promulgated by the Office of Management and Budget and EPA, and in accordance with 15 U.S.C. 2625(h) and (i).

§702.43 Risk evaluation actions and timeframes.

(a) Draft scope.(1) For each risk evaluation to be conducted, EPA will publish a document that specifies the draft scope of the risk evaluation EPA plans to conduct and publish a notice of availability in the Federal Register. The document will address the elements in §702.39(b).

(2) EPA generally expects to publish the draft scope during the prioritization process concurrent with publication of a proposed designation as a High-Priority Substance pursuant to §702.9(g), but no later than 3 months after the initiation of the risk evaluation process for the chemical substance.

(3) EPA will allow a public comment period of no less than 45 calendar days during which interested persons may submit comment on EPA's draft scope. EPA will open a docket to facilitate receipt of public comments.

(b) Final scope.(1) EPA will, no later than 6 months after the initiation of a risk evaluation, publish a document that specifies the final scope of the risk evaluation EPA plans to conduct, and publish a notice of availability in the Federal Register. The document shall address the elements in §702.39(b).

(2) For a chemical substance designated as a High-Priority Substance under subpart A of this part, EPA will not publish the final scope of the risk evaluation until at least 12 months have elapsed from the initiation of the prioritization process for the chemical substance.

(c) Draft risk evaluation. EPA will publish a draft risk evaluation, publish a notice of availability in the Federal Register, open a docket to facilitate receipt of public comment, and provide no less than a 60-day comment period, during which time the public may submit comment on EPA's draft risk evaluation. The document shall include the elements in §702.39(c) through (f).

(d) Final risk evaluation.(1) EPA will complete and publish a final risk evaluation for the chemical substance under the conditions of use as soon as practicable, but not later than 3 years after the date on which EPA initiates the risk evaluation. The document shall include the elements in §702.39(c) through (f) and EPA will publish a notice of availability in the Federal Register.

(2) EPA may extend the deadline for a risk evaluation for not more than 6 months. The total time elapsed between initiation of the risk evaluation and completion of the risk evaluation may not exceed 3- and one-half years.

(e) Final determination of unreasonable risk. Upon determination by the EPA pursuant to §702.39(f) that a chemical substance presents an unreasonable risk of injury to health or the environment, EPA will initiate action as required pursuant to 15 U.S.C. 2605(a).

(f) Final determination of no unreasonable risk. A determination by the EPA pursuant to §702.39(f) that the chemical substance does not present an unreasonable risk of injury to health or the environment will be issued by order and considered to be a final Agency action, effective on the date of issuance of the order.

(g) Substantive revisions to scope documents and risk evaluations. The circumstances under which EPA will undertake substantive revisions to scope and risk evaluation documents are as follows:

(1) Draft documents. To the extent there are changes to a draft scope or draft risk evaluation, EPA will describe such changes in the final document.

(2) Final scope. To the extent there are changes to the scope of the risk evaluation after publication of the final scope document, EPA will describe such changes in the draft risk evaluation, or, where appropriate and prior to the issuance of a draft risk evaluation, may make relevant information publicly available in the docket and publish a notice of availability of that information in the Federal Register.

(3) Final risk evaluation. For any chemical substance for which EPA has already finalized a risk evaluation, EPA will generally not revise, supplement, or reissue a final risk evaluation without first undergoing the procedures at §702.7 to re-initiate the prioritization process for that chemical substance, except where EPA has determined it to be in the interest of protecting human health or the environment to do so, considering the statutory responsibilities and deadlines under 15 U.S.C. 2605.

(4) Process for revisions to final risk evaluations. Where EPA determines to revise or supplement a final risk evaluation pursuant to paragraph (g)(3) of this section, EPA will follow the same procedures in this section including publication of a new draft and final risk evaluation and solicitation of public comment in accordance with §§702.43(c) and (d), and peer review, as appropriate, in accordance with §702.41.

§702.45 Submission of manufacturer requests for risk evaluations.

(a) General provisions.(1) One or more manufacturers of a chemical substance may request that EPA conduct a risk evaluation on a chemical substance.

(2) Such requests must comply with all the requirements, procedures, and criteria in this section.

(3) Subject to limited exceptions in paragraph (e)(7)(iii) of this section, it is the burden of the requesting manufacturer(s) to provide EPA with the information necessary to carry out the risk evaluation.

(4) In determining whether there is sufficient information to support a manufacturer-requested risk evaluation, EPA expects to apply the same standard as it would for EPA-initiated risk evaluations, including but not limited to the considerations and requirements in §702.37.

(5) EPA may identify data needs at any time during the process described in this section, and, by submitting a request for risk evaluation under this section, the requesting manufacturer(s) agrees to provide, or develop and provide, EPA with information EPA deems necessary to carry out the risk evaluation, consistent with the provisions described in this subpart.

(6) EPA will not expedite or otherwise provide special treatment to a manufacturer-requested risk evaluation pursuant to 15 U.S.C. 2605(b)(4)(E)(ii).

(7) Once initiated in accordance with paragraph (e)(9) of this section, EPA will conduct manufacturer-requested risk evaluations following the procedures in §§702.37 through 702.43 and §§702.47 through 702.49 of this subpart.

(8) For purposes of this section, information that is “known to or reasonably ascertainable by” the requesting manufacturer(s) would include all information in the requesting manufacturer's possession or control, plus all information that a reasonable person similarly situated might be expected to possess, control, or know. Meeting this standard requires an exercise and documentation of due diligence that may vary depending on the circumstances and parties involved. At a minimum, due diligence requires:

(i) A thorough search and collection of publicly available information;

(ii) A reasonable inquiry within the requesting manufacturer's entire organization; and

(iii) A reasonably inquiry outside of the requesting manufacturer's organization, including inquiries to upstream suppliers; downstream users; and employees or other agents of the manufacturer, including persons involved in research and development, import or production, or marketing.

(9) In the event that a group of manufacturers of a chemical substance submit a request for risk evaluation under this section, the term “requesting manufacturer” in paragraphs (a), (c), and (i) of this section shall apply to all manufacturers in the group. EPA will otherwise coordinate with the primary contact named in the request for purposes of communication, payment of fees, and other actions as needed.

(b) Method for submission. All manufacturer-requested risk evaluations under this subpart must be submitted via the EPA Central Data Exchange (CDX) found at https://cdx.epa.gov.

(c) Content of request. Requests must include all of the following information:

(1) Name, mailing address, and contact information of the entity (or entities) submitting the request. If more than one manufacturer submits the request, all individual manufacturers must provide their contact information.

(2) The chemical identity of the chemical substance that is the subject of the request. At a minimum, this includes: all known names of the chemical substance, including common or trades names, CAS number, and molecular structure of the chemical substance.

(3) For requests pertaining to a category of chemical substances, an explanation of why the category is appropriate under 15 U.S.C. 2625(c). EPA will determine whether the category is appropriate for risk evaluation as part of reviewing the request in paragraph (e) of this section.

(4) A description of the circumstances under which the chemical substance is intended, known, or reasonably foreseen to be manufactured, processed, distributed in commerce, used, or disposed of, and all information known to or reasonably ascertainable by the requesting manufacturer that supports the identification of the circumstances described in this paragraph (c)(4).

(5) All information known to or reasonably ascertainable by the requesting manufacturer(s) on the health and environmental hazard(s) of the chemical substance, human and environmental exposure(s), and exposed population(s), including but not limited to:

(i) The chemical substance's exposure potential, including occupational, general population and consumer exposures, and facility release information;

(ii) The chemical substance's hazard potential, including all potential environmental and human health hazards;

(iii) The chemical substance's physical and chemical properties;

(iv) The chemical substance's fate and transport properties including persistence and bioaccumulation;

(v) Industrial and commercial locations where the chemical is used or stored;

(vi) Whether there is any storage of the chemical substance near significant sources of drinking water, including the storage facility location and the nearby drinking water source(s);

(vii) Consumer products containing the chemical;

(viii) The chemical substance's production volume or significant changes in production volume; and

(ix) Any other information relevant to the hazards, exposures and/or risks of the chemical substance.

(6) Where information described in paragraph (c)(4) or (5) of this section is unavailable, an explanation as to why, and the rationale for why, in the requester's view, the provided information is nonetheless sufficient to allow EPA to complete a risk evaluation on the chemical substance.

(7) Copies of all information referenced in paragraph (c)(5) of this section, or citations if the information is readily available from public sources.

(8) A signed certification from the requesting manufacturer(s) that all information contained in the request is accurate and complete, as follows:

I certify that to the best of my knowledge and belief:

(A) The company named in this request manufactures the chemical substance identified for risk evaluation.

(B) All information provided in the request is complete and accurate as of the date of the request.

(C) I have either identified or am submitting all information in my possession and control, and a description of all other data known to or reasonably ascertainable by me as required under this part. I am aware it is unlawful to knowingly submit incomplete, false and/or misleading information in this request and there are significant criminal penalties for such unlawful conduct, including the possibility of fine and imprisonment.

(9) Where appropriate, information that will inform EPA's determination as to whether restrictions imposed by one or more States have the potential to have a significant impact on interstate commerce or health or the environment, and that as a consequence the request is entitled to preference pursuant to 15 U.S.C. 2605(b)(4)(E)(iii).

(d) Confidential business information. Persons submitting a request under this subpart are subject to EPA confidentiality regulations at 40 CFR part 2, subpart B, and 40 CFR part 703.

(e) EPA process for reviewing requests.(1) Public notification of receipt of request. Within 15 days of receipt of a manufacturer-requested risk evaluation, EPA will notify the public that such request has been received.

(2) Initial review for completeness. EPA will determine whether the request appears to meet the requirements specified in this section (i.e., complete), or whether the request appears to not have met the requirements specified in this section (i.e., incomplete). EPA will notify the requesting manufacturer of the outcome of this initial review. For requests initially determined to be incomplete, EPA will cease review, pending actions taken by the requesting manufacturer pursuant to paragraph (f) of this section. For requests initially determined to be complete, EPA will proceed to the public notice and comment process described in paragraph (e)(3) of this section.

(3) Public notice and comment. No later than 90 days after initially determining a request to be complete pursuant to paragraph (e)(2) of this section, EPA will submit for publication the receipt of the request in the Federal Register, open a docket for that request and provide no less than a 60-day public comment period. The docket will contain the CBI sanitized copies of the request and all supporting information. The notice will encourage the public to submit comments and information relevant to the manufacturer-requested risk evaluation, including, but not limited to, identifying information not provided in the request, information the commenter believes necessary to conduct a risk evaluation, and any other information relevant to the conditions of use.

(4) Secondary review for sufficiency. Within 90 days following the end of the comment period in paragraph (e)(3) of this section, EPA will further consider whether public comments highlight deficiencies in the request not identified during EPA's initial review, and/or that the available information is not sufficient to support a reasoned evaluation. EPA will notify the requesting manufacturer of the outcome of this review. For requests determined to not be supported by sufficient information, EPA will cease review, pending actions taken pursuant to paragraph (f) of this section. For requests determined to be supported by sufficient information, EPA will proceed with request review process in accordance with paragraph (e)(5) of this section.

(5) Grant. Where EPA determines a request to be complete and sufficiently supported in accordance with paragraphs (e)(2) and (4) of this section, and subject to the percentage limitations in TSCA section 6(b)(4)(E)(i)(II), EPA will grant the request. A grant does not mean that EPA has all information necessary to complete the risk evaluation.

(6) Publication of draft conditions of use and request for information. EPA will publish a notice in the Federal Register that identifies draft conditions of use, requests relevant information from the public, and provides no less than a 60-day public comment period. Within 90 days following the close of the public comment period in this paragraph, EPA will determine whether further information is needed to carry out the risk evaluation and notify the requesting manufacturer of its determination, pursuant to paragraph (e)(7) of this section. If EPA determines at this time that no further information is necessary, EPA will initiate the risk evaluation, pursuant to paragraph (e)(9) of this section.

(7) Identification of information needs. Where additional information needs are identified, EPA will notify the requesting manufacturer and set a reasonable amount of time, as determined by EPA, for response. In response to EPA's notice, and subject to the limitations in paragraph (g) of this section, the requesting manufacturer may:

(i) Provide the necessary information. EPA will set a reasonable amount of time, as determined by EPA, for the requesting manufacturer to produce or develop and produce the information. Upon receipt of the new information, EPA will review for sufficiency and make publicly available to the extent possible, including CBI-sanitized copies of that information; or

(ii) Withdraw the risk evaluation request. Fees to be collected or refunded shall be determined pursuant to paragraph (k) of this section and 40 CFR 700.45; or

(iii) Request that EPA obtain the information using authorities under TSCA sections 4, 8 or 11. The requesting manufacturer must provide a rationale as to why the information is not reasonably ascertainable to them. EPA will review and provide notice of its determination to the requesting manufacturer. Upon receipt of the information, EPA will review the additional information for sufficiency and provide additional public notice.

(8) Unfulfilled information needs. In circumstances where there have been additional data needs identified pursuant to paragraph (e)(7) of this section that are not fulfilled, because the requesting manufacturer is unable or unwilling to fulfill those needs in a timely manner, the requesting manufacture has produced information that is insufficient as determined by EPA, or EPA determines that a request to use TSCA authorities under section 4, 8 or 11 is not warranted, EPA may deem the request to be constructively withdrawn under paragraph (e)(7)(ii) of this section.

(9) Initiation of the risk evaluation. Within 90 days of the end of the comment period provided in paragraph (e)(6) of this section, or within 90 days of EPA determining that information identified and received pursuant to paragraph (e)(7) of this section is sufficient, EPA will initiate the requested risk evaluation and follow all requirements in this subpart, including but not limited to §§702.37 through 702.43 and §§702.47 through 702.49 of this subpart, and notify the requesting manufacturer and the public. Initiation of the risk evaluation does not limit or prohibit the Agency from identifying additional data needs during the risk evaluation process.

(f) Incomplete or insufficient request. Where EPA has determined that a request is incomplete or insufficient pursuant to paragraph (e)(2) or (4) of this section, the requesting manufacturer may supplement and resubmit the request. EPA will follow the process described in paragraph (e) of this section as it would for a new request.

(g) Withdrawal of request. The requesting manufacturer may withdraw a request at any time prior to EPA's grant of such request pursuant to paragraph (e)(5) of this section, or in accordance with paragraph (e)(7) of this section and subject to payment of applicable fees. The requesting manufacturer may not withdraw a request once EPA has initiated the risk evaluation. EPA may deem a request constructively withdrawn in the event of unfulfilled information needs pursuant to paragraph (e)(8) of this section or non-payment of fees as required in 40 CFR 700.45. EPA will notify the requesting manufacturer and the public of the withdrawn request.

(h) Data needs identified post-initiation. Where EPA identifies additional data needs after the risk evaluation has been initiated, the requesting manufacturer may remedy the deficiency pursuant to paragraph (e)(7)(i) or (iii) of this section.

(i) Supplementation of original request. At any time prior to the end of the comment period described in paragraph (e)(6) of this section, the requesting manufacturer(s) may supplement the original request with any new information that becomes available to the requesting manufacturer(s). At any point prior to the completion of a manufacturer-requested risk evaluation pursuant to this section, the requesting manufacturer(s) must supplement the original request with any information that meets the criteria in 15 U.S.C. 2607(e) and this section, or with any other reasonably ascertainable information that has the potential to change EPA's risk evaluation. Such information must be submitted consistent with 15 U.S.C. 2607(e) if the information is subject to that section or otherwise within 30 days of when the requesting manufacturer(s) obtain the information.

(j) Limitations on manufacturer-requested risk evaluations.

(1) In general. EPA will initiate a risk evaluation for all requests from manufacturers for non-TSCA Work Plan Chemicals that meet the criteria in this subpart, until EPA determines that the number of manufacturer-requested chemical substances undergoing risk evaluation is equal to 25% of the High-Priority Substances identified in subpart A as undergoing risk evaluation. Once that level has been reached, EPA will initiate at least one new manufacturer-requested risk evaluation for each manufacturer-requested risk evaluation completed so long as there are sufficient requests that meet the criteria of this subpart, as needed to ensure that the number of manufacturer-requested risk evaluations is equal to at least 25% of the High-Priority substances risk evaluations and not more than 50%.

(2) Preferences. In conformance with §702.35(c), in evaluating requests for TSCA Work Plan Chemicals and requests for non-TSCA Work Plan chemicals, EPA will give preference to requests for risk evaluations on chemical substances:

(i) First, for which EPA determines that restrictions imposed by one or more States have the potential to have a significant impact on interstate commerce, health or the environment; and then

(ii) Second, based on the order in which the requests are received.

(k) Fees. Manufacturers must pay fees to support risk evaluations as specified under 15 U.S.C. 2605(b)(4)(E)(ii), and in accordance with 15 U.S.C. 2625(b) and 40 CFR 700.45. In the event that a request for a risk evaluation is withdrawn by the requesting manufacturer pursuant to paragraph (g) of this section, the total fee amount due will be either, in accordance with 40 CFR 700.45(c)(2)(x) or (xi) (as adjusted by 40 CFR 700.45(d) when applicable), 50% or 100% of the actual costs expended in carrying out the risk evaluation as of the date of receipt of the withdrawal notice. The payment amount will be determined by EPA, and invoice or refund issued to the requesting manufacturer as appropriate.

§702.47 Interagency collaboration.

During the risk evaluation process, not to preclude any additional, prior, or subsequent collaboration, EPA will consult with other relevant Federal agencies.

§702.49 Publicly available information.

For each risk evaluation, EPA will maintain a public docket at https://www.regulations.gov to provide public access to the following information, as applicable for that risk evaluation:

(a) The draft scope, final scope, draft risk evaluation, and final risk evaluation;

(b) All notices, determinations, findings, consent agreements, and orders;

(c) Any information required to be provided to EPA under 15 U.S.C. 2603;

(d) A nontechnical summary of the risk evaluation;

(e) A list of the studies, with the results of the studies, considered in carrying out each risk evaluation;

(f) Any final peer review report, including the response to peer review and public comments received during peer review;

(g) Response to public comments received on the draft scope and the draft risk evaluation; and

(h) Where unreasonable risk to workers is identified via inhalation, EPA's calculation of a risk-based occupational exposure value.

2024-05-03T05:00:00Z

EPA Proposed Rule: Regulations Related to Project Emissions Accounting

In this action, the Environmental Protection Agency (EPA) is proposing revisions to the preconstruction permitting regulations that apply to modifications at existing major stationary sources in the New Source Review (NSR) program under the Clean Air Act (CAA or Act). The proposed revisions include revising the definition of “project” in the NSR regulations, adding additional recordkeeping and reporting requirements applicable to minor modifications at existing major stationary sources, and proposing to require that decreases accounted for in the Step 1 significant emissions increase calculation be enforceable.

DATES: This proposed rule is published in the Federal Register May 3, 2024, page 36870.

View proposed rule.

Beyond the acronyms: A guide to Tier II vs. TRI reporting
2024-05-03T05:00:00Z

Beyond the acronyms: A guide to Tier II vs. TRI reporting

Environmental reporting can be confusing, especially when it comes to terms like Tier II and TRI. I'll never forget my first job in the environmental field. I was tasked with sorting through the records of my predecessor for the upcoming reporting season. Tier II reporting seemed straightforward enough — a basic inventory of what we had on-site. Then there was TRI, which, quite frankly, looked like Tier II's evil twin at the time.

I'll forever be grateful to a senior coworker who, in an attempt to set me straight, likened Tier II reporting to a fire drill and TRI reporting to a full-blown fire inspection. The alphabet soup of acronyms started to make sense. Both reports are related to chemicals; however, they have different focuses, reporting thresholds, and target audiences.

Tier II: Informing the community

Tier II reporting falls under Section 312 of the Emergency Planning and Community Right-to-Know Act (EPCRA). It’s designed to inform local emergency responders and communities about the hazardous materials stored at a facility. This knowledge allows emergency personnel to be better prepared for potential accidents involving hazardous substances.

What to report: Tier II focuses on a broader range of hazardous materials compared to TRI. It covers flammable liquids, compressed gases, health hazards, and reactive chemicals exceeding specific threshold quantities (typically 500 pounds or 55 gallons for most chemicals).

Reporting format: Facilities are required to submit a Tier II Hazardous Chemical Inventory form by March 1 each year. It includes details about the identity, quantity, location, and hazards of each hazardous material stored on-site. Keep in mind that some states may have specific requirements for reporting and submission of the Tier II inventory form and/or the state reporting form or format.

TRI: Tracking toxic releases

The Toxics Release Inventory (TRI) Program, established under Section 313 of EPCRA, serves a different purpose. It focuses on tracking the release, use, and transfer of specific toxic chemicals listed by the Environmental Protection Agency (EPA).

What to report: TRI requires reporting on a specific list of toxic chemicals that exceed certain thresholds. These thresholds are typically 25,000 pounds for manufacturing or processing activities and 10,000 pounds for other uses. The list includes chemicals that are known or suspected to cause harm to human health or the environment.

Reporting format: Facilities that exceed the thresholds must submit a Form R by July 1 each year, which provides detailed information about the listed chemicals. It includes the quantities of the chemicals used, manufactured, processed, released (into the air, water, or land), and transferred off-site.

Have a question for our Compliance Experts? If you have safety or compliance questions, we encourage you to use Compliance Network’s Expert Help tool. Mishka Binns and our team of Compliance Experts will respond to your question within 24 business hours.

See More

Most Recent Highlights In Safety & Health

2024-05-03T05:00:00Z

EPA Final Rule: Withdrawal of Designated Disposal Sites; Nome, Alaska

The Environmental Protection Agency (EPA) is taking direct final action to withdraw from EPA regulation and management two designated ocean dredged material disposal sites, the Nome East and Nome West Sites (Sites), located near Nome, Alaska, pursuant to the Marine Protection, Research, and Sanctuaries Act (MPRSA), as amended. The EPA is taking this action because the United States Army Corps of Engineers (USACE) has not used the Sites for disposal of dredged material since 2009, has no plans to use the Sites for any future disposal of dredged material, and the Sites are no longer suitable for USACE's needs. This action will withdraw these sites from the regulations.

DATES: This rule is effective on August 1, 2024 published in the Federal Register May 3, 2024, page 36681.

§228.15 Dumping sites designated on a final basis.
(n)(12) and (13)Removed and reservedView text
2024-04-26T05:00:00Z

EPA Final Rule: PFAS National Primary Drinking Water Regulation

In March 2023, the U.S. Environmental Protection Agency (EPA) proposed and requested comment on the National Primary Drinking Water Regulation (NPDWR) and health-based Maximum Contaminant Level Goals (MCLGs) for six per- and polyfluoroalkyl substances (PFAS): perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), perfluorohexane sulfonic acid (PFHxS), perfluorononanoic acid (PFNA), hexafluoropropylene oxide dimer acid (HFPO-DA, commonly known as GenX Chemicals), and perfluorobutane sulfonic acid (PFBS). After consideration of public comment and consistent with the provisions set forth under the Safe Drinking Water Act (SDWA), the EPA is finalizing NPDWRs for these six PFAS. Through this action, the EPA is finalizing MCLGs for PFOA and PFOS at zero. Considering feasibility, the EPA is promulgating individual Maximum Contaminant Levels (MCLs) for PFOA and PFOS at 4.0 nanograms per liter (ng/L) or parts per trillion (ppt). The EPA is also finalizing individual MCLGs and is promulgating individual MCLs for PFHxS, PFNA, and HFPO-DA at 10 ng/L. In addition to the individual MCLs for PFHxS, PFNA, and HFPO-DA, in consideration of the known toxic effects, dose additive health concerns and occurrence and likely co-occurrence in drinking water of these three PFAS, as well as PFBS, the EPA is finalizing a Hazard Index (HI) of 1 (unitless) as the MCLG and MCL for any mixture containing two or more of PFHxS, PFNA, HFPO-DA, and PFBS. Once fully implemented, the EPA estimates that the rule will prevent thousands of deaths and reduce tens of thousands of serious PFAS-attributable illnesses.

DATES: This final rule is effective on June 25, 2024, published in the Federal Register April 26, 2024, page 32532.

View final rule.

2024-04-25T05:00:00Z

EPA Final Rule: Revisions and Confidentiality Determinations for Data Elements Under the Greenhouse Gas Reporting Rule

The EPA is amending specific provisions in the Greenhouse Gas Reporting Rule to improve data quality and consistency. This action updates the General Provisions to reflect revised global warming potentials; expands reporting to additional sectors; improves the calculation, recordkeeping, and reporting requirements by updating existing methodologies; improves data verifications; and provides for collection of additional data to better inform and be relevant to a wide variety of Clean Air Act provisions that the EPA carries out. This action adds greenhouse gas monitoring and reporting for five source categories including coke calcining; ceramics manufacturing; calcium carbide production; caprolactam, glyoxal, and glyoxylic acid production; and facilities conducting geologic sequestration of carbon dioxide with enhanced oil recovery. These revisions also include changes that will improve implementation of the rule such as updates to applicability estimation methodologies, simplifying calculation and monitoring methodologies, streamlining recordkeeping and reporting, and other minor technical corrections or clarifications. This action also establishes and amends confidentiality determinations for the reporting of certain data elements to be added or substantially revised in these amendments.

DATES: This rule is effective January 1, 2025, published in the Federal Register April 25, 2024, page 31802.

View final rule.

2024-04-22T05:00:00Z

EPA Final Rule: Greenhouse Gas Emissions Standards for Heavy-Duty Vehicles—Phase 3

The Environmental Protection Agency (EPA) is promulgating new greenhouse gas (GHG) emissions standards for model year (MY) 2032 and later heavy-duty highway vehicles that phase in starting as early MY 2027 for certain vehicle categories. The phase in revises certain MY 2027 GHG standards that were established previously under EPA's Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles—Phase 2 rule (“HD GHG Phase 2”). This document also updates discrete elements of the Averaging Banking and Trading program, including providing additional flexibilities for manufacturers to support the implementation of the Phase 3 program balanced by limiting the availability of certain advanced technology credits initially established under the HD GHG Phase 2 rule. EPA is also adding warranty requirements for batteries and other components of zero-emission vehicles and requiring customer-facing battery state-of-health monitors for plug-in hybrid and battery electric vehicles. In this action, we are also finalizing additional revisions, including clarifying and editorial amendments to certain highway heavy-duty vehicle provisions and certain test procedures for heavy-duty engines.

DATES: This final rule is effective on June 21, 2024, published in the Federal Register April 22, 2024, page 29440.

View final rule.

EPA designates 2 PFAS as CERCLA hazardous substances
2024-04-19T05:00:00Z

EPA designates 2 PFAS as CERCLA hazardous substances

The Environmental Protection Agency (EPA) finalized a rule to designate two widely used PFAS — perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), including their salts and structural isomers — as hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).

The rule requires entities to immediately report releases of PFOA and PFOS that meet or exceed the reportable quantity (1 pound) to the:

  • National Response Center,
  • State/tribal emergency response commission, and
  • Local/tribal emergency planning committee.

Further, it gives EPA the authority to hold polluters responsible for paying for or conducting investigations and cleanup of PFOA and PFOS releases. In a memorandum, EPA clarified that it will focus enforcement efforts on significant contributors to PFAS releases.

Additionally:

  • Federal entities that transfer or sell property must give notification about the storage, release, or disposal of PFOA and PFAS on the property and include in the deed a commitment that either:
    • Warrants it has cleaned up any contamination, or
    • If needed, it will do so in the future.
  • Section 306 of CERCLA requires the Department of Transportation to list and regulate PFOA and PFAS as hazardous substances under the Hazardous Materials Transportation Act.

The rule takes effect 60 days after it’s published in the Federal Register.

Key to remember: EPA has designated PFOA and PFOS as CERCLA hazardous substances, requiring immediate release notifications for the two PFAS and expanding the agency’s authority to hold parties responsible for contamination accountable.

See More

Most Recent Highlights In Human Resources

Chemical Data Reporting: 5 tips for a winning report
2024-04-19T05:00:00Z

Chemical Data Reporting: 5 tips for a winning report

It’s time for that special event that happens once every four years, often testing the endurance of the participants who’ve spent the prior years preparing for this very moment. No, it’s not the Summer Olympics, though that’s a great guess. It’s the Chemical Data Report!

Under the Toxic Substances Control ACT (TSCA), the Environmental Protection Agency’s (EPA’s) Chemical Data Reporting (CDR) rule requires manufacturers (including importers) to report information on the production and use of chemicals in commerce if they meet certain production volume thresholds at any one site. The submission period for the 2024 report runs from June 1 to September 30, 2024.

Use these tips to help you complete a Chemical Data Report worthy of a gold medal.

Tip #1: Verify that your facility is covered.

The TSCA Chemical Substance Inventory (TSCA Inventory) lists the covered chemical substances. Generally, the production volume threshold is 25,000 pounds or more of a chemical substance at a site. However, a reduced reporting threshold (2,500 pounds) applies to chemical substances subject to:

  • A rule proposed or promulgated under TSCA Sections 5(a)(2), 5(b)(4), or 6;
  • An order issued under TSCA Sections 4, 5(e), or 5(f); or
  • A relief granted under a civil action under TSCA Sections 5 or 7.

Further, certain full and partial exemptions apply to facilities based on the:

  • Chemical substances,
  • Size of the business, and/or
  • Activities conducted.

To confirm whether your facility must report:

  • Check the most recent nonconfidential TSCA Inventory, which you can download from EPA’s website or access through its electronic CDR reporting tool (e-CDRweb);
  • Search the Substance Registry Services (SRS), accessible through e-CDRweb, to determine if any of the facility’s chemical substances are subject to TSCA actions;
  • Search the SRS for chemical substances on the confidential portion of the inventory (by TSCA Accession Numbers or generic chemical names); and
  • Examine the regulations at 40 CFR Part 711 to determine whether your facility qualifies for any reporting exemptions.

Tip #2: If a chemical substance is reportable for one year, you must report its production volume for all years.

The CDR rule requires facilities to report the total annual production volume of covered chemical substances for each calendar year since the last principal reporting year.

In other words, if a chemical substance at your facility meets or exceeds the corresponding reporting threshold during any calendar year covered by the report, you must include the total annual production volume of that chemical for every covered calendar year.

For example, you must list on the 2024 report the production volumes of every reportable chemical substance for 2020, 2021, 2022, and 2023.

Tip #3: The CDR form is site-specific, not chemical-specific.

All CDR data must be reported electronically on Form U (EPA Form 7740-8) through e-CDRweb on EPA’s Central Data Exchange (CDX) system. Reporting is site-specific, so if your organization has multiple sites with reportable chemicals, you must submit a Form U for each site.

Keep in mind that you submit only one form per site, so all reportable chemical substances at a specific site are listed on the same Form U. You may have to submit multiple forms only if you have more than one site covered by the CDR rule.

Tip #4: Register for the right CDX user role.

To submit a Chemical Data Report, you must first register with the CDX system and be approved by EPA. Plus, you must register the name of the organization on whose behalf you’re submitting a Form U. If you’re already registered on CDX, you can add the CDR reporting flow to your current registration.

Because each type of user role has varying permissions, it’s essential to register for the right one. User roles include:

  • Primary Authorized Officials,
  • Secondary Authorized Officials,
  • Primary Support,
  • Secondary Support,
  • Primary Agent/Consultant, and
  • Secondary Agent/Consultant.

Only Primary Authorized Officials may submit initial Chemical Data Reports. So, if you’re the one who will submit Form U, confirm that you’re registered as a Primary Authorized Official.

Tip #5: You’re not done when you submit the report.

The CDR rule requires organizations to keep records of all CDR information reported on Form U to EPA for at least five years (711.25). The five-year timeline begins on the last day of the submission period.

Additionally, you may have to amend Form U after submitting the initial report. This can apply if:

  • You find errors or omissions during a self-audit of the Chemical Data Report,
  • You receive newly available information,
  • You believe the organization may have violated reporting requirements, or
  • EPA finds errors or omissions (in which case, the agency will likely send a letter requiring you to make corrections within a specific time frame).

Key to remember: The Chemical Data Report can be a major undertaking, but with these tips, you can cross the finish line with a report worthy of a gold medal.

2024-04-18T05:00:00Z

EPA Final Rule: Emissions Standards for 2027 and Later Light Duty and Medium-Duty Vehicles

Under the Clean Air Act, the Environmental Protection Agency (EPA) is establishing new, more protective emissions standards for criteria pollutants and greenhouse gases (GHG) for light-duty vehicles and Class 2b and 3 (‘‘medium-duty’’) vehicles that will phase-in over model years 2027 through 2032. In addition, EPA is finalizing GHG program revisions in several areas, including off-cycle and air conditioning credits, the treatment of upstream emissions associated with zero-emission vehicles and plug-in hybrid electric vehicles in compliance calculations, medium-duty vehicle incentive multipliers, and vehicle certification and compliance. EPA is also establishing new standards to control refueling emissions from incomplete medium-duty vehicles, and battery durability and warranty requirements for light-duty and medium-duty electric and plug-in hybrid electric vehicles. EPA is also finalizing minor amendments to update program requirements related to aftermarket fuel conversions, importing vehicles and engines, evaporative emission test procedures, and test fuel specifications for measuring fuel economy.

DATES: This final rule is effective on June 17, 2024, published in the Federal Register April 18, 2024, page 27842.

View final rule.

2024-04-17T05:00:00Z

EPA Final Rule: Other Solid Waste Incinerators; Air Curtain Incinerators Title V Permitting Provisionss

On August 31, 2020, in accordance with requirements under the Clean Air Act (CAA), the U.S. Environmental Protection Agency (EPA) performed a 5-year review of the Standards of Performance for New Stationary Sources and Emissions Guidelines for Existing Sources: Other Solid Waste Incineration (OSWI) Units, which includes certain very small municipal waste combustion (VSMWC) and institutional waste incineration (IWI) units. In the same action, the EPA proposed to remove the title V permitting requirements for air curtain incinerators (ACI) that burn only wood waste, clean lumber, yard waste, or a mixture of these three types of waste. In response to supportive comments received on the August 2020 proposal, this action is finalizing, as proposed, to remove the title V permitting requirements for ACIs that only burn wood waste, clean lumber, yard waste, or a mixture of those, and are not located at title V major sources or subject to title V for other reasons. The EPA is finalizing this proposed action now to simplify the compliance obligations for owners and operators of these types of units.

DATES: The effective date of this rule is April 17, 2024, published in the Federal Register April 17, 2024, page 27392.

View final rule.

§60.2966 Am I required to apply for and obtain a title V operating permit for my unit?
Entire sectionRevisedView text
§60.2967 When must I submit a title V permit application for my new unit?
Entire sectionRevisedView text
§60.2969 What are the requirements for temporary-use incinerators and air curtain incinerators used in disaster recovery?
Entire sectionRemoved and reservedView text
§60.2974 Am I required to apply for and obtain a title V operating permit for my air curtain incinerator that burns only wood waste, clean lumber, and yard waste?
Entire sectionRemoved and reservedView text
Subpart FFFF - Emission Guidelines and Compliance Times for Other Solid Waste Incineration Units That Commenced Construction On or Before December 9, 2004
HeadingRevisedView text
§60.3059 Am I required to apply for and obtain a title V operating permit for my unit?
Entire sectionRevisedView text
§60.3060 When must I submit a title V permit application for my existing unit?
Entire sectionRemoved and reservedView text

Previous Text

§60.2966 Am I required to apply for and obtain a title V operating permit for my unit?

Yes, if you are subject to this subpart, you are required to apply for and obtain a title V operating permit unless you meet the relevant requirements for an exemption specified in §60.2887.

§60.2967 When must I submit a title V permit application for my new unit?

(a) If your new unit subject to this subpart is not subject to an earlier permit application deadline, a complete title V permit application must be submitted on or before one of the dates specified in paragraphs (a)(1) or (2) of this section. (See section 503(c) of the Clean Air Act and 40 CFR 70.5(a)(1)(i) and 40 CFR 71.5(a)(1)(i).)

(1) For a unit that commenced operation as a new source as of December 16, 2005, then a complete title V permit application must be submitted not later than December 18, 2006.

(2) For a unit that does not commence operation as a new source until after December 16, 2005, then a complete title V permit application must be submitted not later than 12 months after the date the unit commences operation as a new source.

(b) If your new unit subject to this subpart is subject to title V as a result of some triggering requirement(s) other than this subpart (for example, a unit subject to this subpart may be a major source or part of a major source), then your unit may be required to apply for a title V permit prior to the deadlines specified in paragraph (a) of this section. If more than one requirement triggers a source's obligation to apply for a title V permit, the 12-month timeframe for filing a title V permit application is triggered by the requirement that first causes the source to be subject to title V. (See section 503(c) of the Clean Air Act and 40 CFR 70.3(a) and (b), 40 CFR 70.5(a)(1)(i), 40 CFR 71.3(a) and (b), and 40 CFR 71.5(a)(1)(i).)

(c) A “complete” title V permit application is one that has been determined or deemed complete by the relevant permitting authority under section 503(d) of the Clean Air Act and 40 CFR 70.5(a)(2) or 40 CFR 71.5(a)(2). You must submit a complete permit application by the relevant application deadline in order to operate after this date in compliance with Federal law. (See sections 503(d) and 502(a) of the Clean Air Act and 40 CFR 70.7(b) and 40 CFR 71.7(b).)

Subpart FFFF - Emission Guidelines and Compliance Times for Other Solid Waste Incineration Units That Commenced Construction On or Before December 9, 2004

§60.3059 Am I required to apply for and obtain a title V operating permit for my unit?

Yes, if you are subject to an applicable EPA-approved and effective Clean Air Act section 111(d)/129 State or Tribal plan or an applicable and effective Federal plan, you are required to apply for and obtain a title V operating permit unless you meet the relevant requirements for an exemption specified in §60.2993.

2024-04-16T05:00:00Z

EPA Final Rule: Clean Water Act Methods Update Rule for the Analysis of Effluent

The U.S. Environmental Protection Agency (EPA) is finalizing changes to its test procedures required to be used by industries and municipalities when analyzing the chemical, physical, and biological properties of wastewater and other samples for reporting under the EPA's National Pollutant Discharge Elimination System permit program. The Clean Water Act requires the EPA to promulgate these test procedures (analytical methods) for analysis of pollutants. The EPA anticipates that these changes will provide increased flexibility for the regulated community in meeting monitoring requirements while improving data quality. In addition, this update to the CWA methods will incorporate technological advances in analytical technology and make a series of minor changes and corrections to existing approved methods. As such, the EPA expects that these changes will not result in any negative economic impacts.

DATES: This final rule is effective on June 17, 2024, published in the Federal Register April 16, 2024, page 27288.

View final rule.

§136.3 Identification of test procedures.
(a), tables IA, IB, IC, ID, and IHRevisedView text
(b)RevisedView text
(e), table II, Footnote “5”RevisedView text

New Text

§136.3 Identification of test procedures.

(a)

* * * *

Table IA—List of Approved Biological Methods for Wastewater and Sewage Sludge
Parameter and unitsMethod 1EPAStandard methodsAOAC, ASTM, USGSOther
Table IA notes:
1 The method must be specified when results are reported.
2 A 0.45-µm membrane filter (MF) or other pore size certified by the manufacturer to fully retain organisms to be cultivated and to be free of extractables which could interfere with their growth.
3 Microbiological Methods for Monitoring the Environment, Water and Wastes, EPA/600/8-78/017. 1978. US EPA.
4 U.S. Geological Survey Techniques of Water-Resource Investigations, Book 5, Laboratory Analysis, Chapter A4, Methods for Collection and Analysis of Aquatic Biological and Microbiological Samples. 1989. USGS.
5 Because the MF technique usually yields low and variable recovery from chlorinated wastewaters, the Most Probable Number method will be required to resolve any controversies.
6 Tests must be conducted to provide organism enumeration (density). Select the appropriate configuration of tubes/filtrations and dilutions/volumes to account for the quality, character, consistency, and anticipated organism density of the water sample.
7 When the MF method has been used previously to test waters with high turbidity, large numbers of noncoliform bacteria, or samples that may contain organisms stressed by chlorine, a parallel test should be conducted with a multiple-tube technique to demonstrate applicability and comparability of results.
8 To assess the comparability of results obtained with individual methods, it is suggested that side-by-side tests be conducted across seasons of the year with the water samples routinely tested in accordance with the most current Standard Methods for the Examination of Water and Wastewater or EPA alternate test procedure (ATP) guidelines.
9 Annual Book of ASTM Standards—Water and Environmental Technology, Section 11.02. 2000, 1999, 1996. ASTM International.
10 Official Methods of Analysis of AOAC International. 16th Edition, 4th Revision, 1998. AOAC International.
11 Recommended for enumeration of target organism in sewage sludge.
12 The multiple-tube fermentation test is used in 9221B.2-2014. Lactose broth may be used in lieu of lauryl tryptose broth (LTB), if at least 25 parallel tests are conducted between this broth and LTB using the water samples normally tested, and this comparison demonstrates that the false-positive rate and false-negative rate for total coliform using lactose broth is less than 10 percent. No requirement exists to run the completed phase on 10 percent of all total coliform-positive tubes on a seasonal basis.
13 These tests are collectively known as defined enzyme substrate tests.
14 After prior enrichment in a presumptive medium for total coliform using 9221B.2-2014, all presumptive tubes or bottles showing any amount of gas, growth or acidity within 48 h ± 3 h of incubation shall be submitted to 9221F-2014. Commercially available EC-MUG media or EC media supplemented in the laboratory with 50 µg/mL of MUG may be used.
15 Method 1680: Fecal Coliforms in Sewage Sludge (Biosolids) by Multiple-Tube Fermentation Using Lauryl-Tryptose Broth (LTB) and EC Medium, EPA-821-R-14-009. September 2014. U.S. EPA.
16 Samples shall be enumerated by the multiple-tube or multiple-well procedure. Using multiple-tube procedures, employ an appropriate tube and dilution configuration of the sample as needed and report the Most Probable Number (MPN). Samples tested with Colilert® may be enumerated with the multiple-well procedures, Quanti-Tray® or Quanti-Tray®/2000 and the MPN calculated from the table provided by the manufacturer.
17 Colilert-18® is an optimized formulation of the Colilert® for the determination of total coliforms and E. coli that provides results within 18 h of incubation at 35°C rather than the 24 h required for the Colilert® test and is recommended for marine water samples.
18 Descriptions of the Colilert®, Colilert-18®, Quanti-Tray®, and Quanti-Tray®/2000 may be obtained from IDEXX Laboratories, Inc.
19 A description of the mColiBlue24® test is available from Hach Company.
20 Method 1681: Fecal Coliforms in Sewage Sludge (Biosolids) by Multiple-Tube Fermentation Using A-1 Medium, EPA-821-R-06-013. July 2006. U.S. EPA.
21 Method 1603.1: Escherichia coli ( E. coli) in Water by Membrane Filtration Using Modified membrane-Thermotolerant Escherichia coli Agar (Modified mTEC), EPA-821-R-23-008. September 2023. U.S. EPA.
22 Method 1682: Salmonella in Sewage Sludge (Biosolids) by Modified Semisolid Rappaport-Vassiliadis (MSRV) Medium, EPA-821-R-14-012. September 2014. U.S. EPA.
23 A description of the Enterolert® test may be obtained from IDEXX Laboratories Inc.
24 Method 1600.1: Enterococci in Water by Membrane Filtration Using Membrane-Enterococcus Indoxyl-β-D-Glucoside Agar (mEI), EPA-821-R-23-006. September 2023. U.S. EPA.
25 Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, EPA-821-R-02-012. Fifth Edition, October 2002. U.S. EPA; and U.S. EPA Whole Effluent Toxicity Methods Errata Sheet, EPA 821-R-02-012-ES. December 2016.
26 Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms, EPA-821-R-02-013. Fourth Edition, October 2002. U.S. EPA; and U.S. EPA Whole Effluent Toxicity Methods Errata Sheet, EPA 821-R-02-012-ES. December 2016.
27 Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Marine and Estuarine Organisms, EPA-821-R-02-014. Third Edition, October 2002. U.S. EPA; and U.S. EPA Whole Effluent Toxicity Methods Errata Sheet, EPA 821-R-02-012-ES. December 2016.
28 To use Colilert-18® to assay for fecal coliforms, the incubation temperature is 44.5 ± 0.2 °C, and a water bath incubator is used.
29 On a monthly basis, at least ten blue colonies from positive samples must be verified using Lauryl Tryptose Broth and EC broth, followed by count adjustment based on these results; and representative non-blue colonies should be verified using Lauryl Tryptose Broth. Where possible, verifications should be done from randomized sample sources.
30 On a monthly basis, at least ten sheen colonies from positive samples must be verified using lauryl tryptose broth and brilliant green lactose bile broth, followed by count adjustment based on these results; and representative non-sheen colonies should be verified using lauryl tryptose broth. Where possible, verifications should be done from randomized sample sources.
31 Subject coliform positive samples determined by 9222 B-2015 or other membrane filter procedure to 9222 I-2015 using NA-MUG media.
32 Verification of colonies by incubation of BHI agar at 10 ± 0.5 °C for 48 ± 3 h is optional. As per the Errata to the 23rd Edition of Standard Methods for the Examination of Water and Wastewater “Growth on a BHI agar plate incubated at 10 ± 0.5 °C for 48 ± 3 h is further verification that the colony belongs to the genus Enterococcus.”
33 9221F. 2-2014 allows for simultaneous detection of E. coli and thermotolerant fecal coliforms by adding inverted vials to EC-MUG; the inverted vials collect gas produced by thermotolerant fecal coliforms.
Bacteria
1. Coliform (fecal), number per gram dry weightMost Probable Number (MPN), 5 tube, 3 dilution, orp. 132, 3 1680, 1115 1681 11209221 E-2014.
Membrane filter (MF), 25 single stepp. 124 39222 D-2015. 29
2. Coliform (fecal), number per 100 mLMPN, 5 tube, 3 dilution, orp. 132 39221 E-2014, 9221 F-2014. 33
Multiple tube/multiple well, orColilert-18®. 131828
MF, 25 single step 5p. 124 39222 D-2015 29B-0050-85. 4
3. Coliform (total), number per 100 mLMPN, 5 tube, 3 dilution, orp. 114 39221 B-2014.
MF, 25 single step orp. 108 39222 B-2015 30B-0025-85. 4
MF, 25 two step with enrichmentp. 111 39222 B-2015. 30
4. E. coli, number per 100 mLMPN 6816 multiple tube, or9221 B2014/9221 F-2014. 121433
multiple tube/multiple well, or9223 B-2016 13991.15 10Colilert®. 1318 Colilert-18®. 131718
MF, 25678 two step, or9222 B-2015/9222 I-2015. 31
Single step1603.1 21m-ColiBlue24®. 19
5. Fecal streptococci, number per 100 mLMPN, 5 tube, 3 dilution, orp. 139 39230 B-2013.
MF, 2 orp. 136 39230 C-2013 32B-0055-85. 4
Plate countp. 143. 3
6. Enterococci, number per 100 mLMPN, 5 tube, 3 dilution, orp. 139 39230 B-2013.
MPN, 68 multiple tube/multiple well, or9230 D-2013D6503-99 9Enterolert®. 1323
MF 25678 single step or1600.1 249230 C-2013. 32
Plate countp. 143. 3
7. Salmonella , number per gram dry weight 11MPN multiple tube1682. 22
Aquatic Toxicity
8. Toxicity, acute, fresh water organisms, LC 50 , percent effluentWater flea, Cladoceran, Ceriodaphnia dubia acute2002.0. 25
Water flea, Cladocerans, Daphnia pulex and Daphnia magna acute2021.0. 25
Fish, Fathead minnow, Pimephales promelas, and Bannerfin shiner, Cyprinella leedsi, acute2000.0. 25
Fish, Rainbow trout, Oncorhynchus mykiss, and brook trout, Salvelinus fontinalis, acute2019.0. 25
9. Toxicity, acute, estuarine and marine organisms of the Atlantic Ocean and Gulf of Mexico, LC 50 , percent effluentMysid, Mysidopsis bahia, acute2007.0. 25
Fish, Sheepshead minnow, Cyprinodon variegatus, acute2004.0. 25
Fish, Silverside, Menidia beryllina, Menidia menidia, and Menidia peninsulae, acute2006.0. 25
10. Toxicity, chronic, fresh water organisms, NOEC or IC 25 , percent effluentFish, Fathead minnow, Pimephales promelas, larval survival and growth1000.0. 26
Fish, Fathead minnow, Pimephales promelas, embryo-larval survival and teratogenicity1001.0. 26
Water flea, Cladoceran, Ceriodaphnia dubia, survival and reproduction1002.0. 26
Green alga, Selenastrum capricornutum, growth1003.0. 26
11. Toxicity, chronic, estuarine and marine organisms of the Atlantic Ocean and Gulf of Mexico, NOEC or IC 25 , percent effluentFish, Sheepshead minnow, Cyprinodon variegatus, larval survival and growth.1004.0. 27
Fish, Sheepshead minnow, Cyprinodon variegatus, embryo-larval survival and teratogenicity1005.0. 27
Fish, Inland silverside, Menidia beryllina, larval survival and growth1006.0. 27
Mysid, Mysidopsis bahia, survival, growth, and fecundity1007.0. 27
Sea urchin, Arbacia punctulata, fertilization1008.0. 27

Table IB—List of Approved Inorganic Test Procedures
ParameterMethodology 58EPA 52Standard methods 84ASTMUSGS/AOAC/Other
Table IB Notes:
1 Methods for Chemical Analysis of Water and Wastes, EPA-600/4-79-020. Revised March 1983 and 1979, where applicable. U.S. EPA.
2 Methods for Analysis of Inorganic Substances in Water and Fluvial Sediments, Techniques of Water-Resource Investigations of the U.S. Geological Survey, Book 5, Chapter A1., unless otherwise stated. 1989. USGS.
3 Official Methods of Analysis of the Association of Official Analytical Chemists, Methods Manual, Sixteenth Edition, 4th Revision, 1998. AOAC International.
4 For the determination of total metals (which are equivalent to total recoverable metals) the sample is not filtered before processing. A digestion procedure is required to solubilize analytes in suspended material and to break down organic-metal complexes (to convert the analyte to a detectable form for colorimetric analysis). For non-platform graphite furnace atomic absorption determinations, a digestion using nitric acid (as specified in Section 4.1.3 of Methods for Chemical Analysis of Water and Wastes) is required prior to analysis. The procedure used should subject the sample to gentle acid refluxing, and at no time should the sample be taken to dryness. For direct aspiration flame atomic absorption (FLAA) determinations, a combination acid (nitric and hydrochloric acids) digestion is preferred, prior to analysis. The approved total recoverable digestion is described as Method 200.2 in Supplement I of “Methods for the Determination of Metals in Environmental Samples” EPA/600R-94/111, May 1994, and is reproduced in EPA Methods 200.7, 200.8, and 200.9 from the same Supplement. However, when using the gaseous hydride technique or for the determination of certain elements such as antimony, arsenic, selenium, silver, and tin by non-EPA graphite furnace atomic absorption methods, mercury by cold vapor atomic absorption, the noble metals and titanium by FLAA, a specific or modified sample digestion procedure may be required, and, in all cases the referenced method write-up should be consulted for specific instruction and/or cautions. For analyses using inductively coupled plasma-atomic emission spectrometry (ICP-AES), the direct current plasma (DCP) technique or EPA spectrochemical techniques (platform furnace AA, ICP-AES, and ICP-MS), use EPA Method 200.2 or an approved alternate procedure ( e.g., CEM microwave digestion, which may be used with certain analytes as indicated in this table IB); the total recoverable digestion procedures in EPA Methods 200.7, 200.8, and 200.9 may be used for those respective methods. Regardless of the digestion procedure, the results of the analysis after digestion procedure are reported as “total” metals.
5 Copper sulfate or other catalysts that have been found suitable may be used in place of mercuric sulfate.
6 Manual distillation is not required if comparability data on representative effluent samples are on file to show that this preliminary distillation step is not necessary; however, manual distillation will be required to resolve any controversies. In general, the analytical method should be consulted regarding the need for distillation. If the method is not clear, the laboratory may compare a minimum of 9 different sample matrices to evaluate the need for distillation. For each matrix, a matrix spike and matrix spike duplicate are analyzed both with and without the distillation step (for a total of 36 samples, assuming 9 matrices). If results are comparable, the laboratory may dispense with the distillation step for future analysis. Comparable is defined as <20% RPD for all tested matrices). Alternatively, the two populations of spike recovery percentages may be compared using a recognized statistical test.
7 Industrial Method Number 379-75 WE Ammonia, Automated Electrode Method, Technicon Auto Analyzer II. February 19, 1976. Bran & Luebbe Analyzing Technologies Inc.
8 The approved method is that cited in Methods for Determination of Inorganic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A1. 1979. USGS.
9 American National Standard on Photographic Processing Effluents. April 2, 1975. American National Standards Institute.
10 In-Situ Method 1003-8-2009, Biochemical Oxygen Demand (BOD) Measurement by Optical Probe. 2009. In-Situ Incorporated.
11 The use of normal and differential pulse voltage ramps to increase sensitivity and resolution is acceptable.
12 Carbonaceous biochemical oxygen demand (CBOD 5) must not be confused with the traditional BOD 5 test method which measures “total 5-day BOD.” The addition of the nitrification inhibitor is not a procedural option but must be included to report the CBOD 5 parameter. A discharger whose permit requires reporting the traditional BOD 5 may not use a nitrification inhibitor in the procedure for reporting the results. Only when a discharger's permit specifically states CBOD 5 is required can the permittee report data using a nitrification inhibitor.
13 OIC Chemical Oxygen Demand Method. 1978. Oceanography International Corporation.
14 Method 8000, Chemical Oxygen Demand, Hach Handbook of Water Analysis, 1979. Hach Company.
15 The back-titration method will be used to resolve controversy.
16 Orion Research Instruction Manual, Residual Chlorine Electrode Model 97-70. 1977. Orion Research Incorporated. The calibration graph for the Orion residual chlorine method must be derived using a reagent blank and three standard solutions, containing 0.2, 1.0, and 5.0 mL 0.00281 N potassium iodate/100 mL solution, respectively.
17 Method 245.7, Mercury in Water by Cold Vapor Atomic Fluorescence Spectrometry, EPA-821-R-05-001. Revision 2.0, February 2005. US EPA.
18 National Council of the Paper Industry for Air and Stream Improvement (NCASI) Technical Bulletin 253 (1971) and Technical Bulletin 803, May 2000.
19 Method 8506, Bicinchoninate Method for Copper, Hach Handbook of Water Analysis. 1979. Hach Company.
20 When using a method with block digestion, this treatment is not required.
21 Industrial Method Number 378-75WA, Hydrogen ion (pH) Automated Electrode Method, Bran & Luebbe (Technicon) Autoanalyzer II. October 1976. Bran & Luebbe Analyzing Technologies.
22 Method 8008, 1,10-Phenanthroline Method using FerroVer Iron Reagent for Water. 1980. Hach Company.
23 Method 8034, Periodate Oxidation Method for Manganese, Hach Handbook of Wastewater Analysis. 1979. Hach Company.
24 Methods for Analysis of Organic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A3, (1972 Revised 1987). 1987. USGS.
25 Method 8507, Nitrogen, Nitrite-Low Range, Diazotization Method for Water and Wastewater. 1979. Hach Company.
26 Just prior to distillation, adjust the sulfuric-acid-preserved sample to pH 4 with 1 + 9 NaOH.
27 The colorimetric reaction must be conducted at a pH of 10.0 ± 0.2.
28 Addison, R.F., and R.G. Ackman. 1970. Direct Determination of Elemental Phosphorus by Gas-Liquid Chromatography, Journal of Chromatograph y, 47(3):421-426.
29 Approved methods for the analysis of silver in industrial wastewaters at concentrations of 1 mg/L and above are inadequate where silver exists as an inorganic halide. Silver halides such as the bromide and chloride are relatively insoluble in reagents such as nitric acid but are readily soluble in an aqueous buffer of sodium thiosulfate and sodium hydroxide to pH of 12. Therefore, for levels of silver above 1 mg/L, 20 mL of sample should be diluted to 100 mL by adding 40 mL each of 2 M Na 2 S 2 O 3 and NaOH. Standards should be prepared in the same manner. For levels of silver below 1 mg/L the approved method is satisfactory.
30 The use of EDTA decreases method sensitivity. Analysts may omit EDTA or replace with another suitable complexing reagent provided that all method-specified quality control acceptance criteria are met.
31 For samples known or suspected to contain high levels of silver ( e.g., in excess of 4 mg/L), cyanogen iodide should be used to keep the silver in solution for analysis. Prepare a cyanogen iodide solution by adding 4.0 mL of concentrated NH 4 OH, 6.5 g of KCN, and 5.0 mL of a 1.0 N solution of I 2 to 50 mL of reagent water in a volumetric flask and dilute to 100.0 mL. After digestion of the sample, adjust the pH of the digestate to <7 to prevent the formation of HCN under acidic conditions. Add 1 mL of the cyanogen iodide solution to the sample digestate and adjust the volume to 100 mL with reagent water (NOT acid). If cyanogen iodide is added to sample digestates, then silver standards must be prepared that contain cyanogen iodide as well. Prepare working standards by diluting a small volume of a silver stock solution with water and adjusting the pH>7 with NH 4 OH. Add 1 mL of the cyanogen iodide solution and let stand 1 hour. Transfer to a 100-mL volumetric flask and dilute to volume with water.
32 “Water Temperature-Influential Factors, Field Measurement and Data Presentation,” Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 1, Chapter D1. 1975. USGS.
33 Method 8009, Zincon Method for Zinc, Hach Handbook of Water Analysis, 1979. Hach Company.
34 Method AES0029, Direct Current Plasma (DCP) Optical Emission Spectrometric Method for Trace Elemental Analysis of Water and Wastes. 1986—Revised 1991. Thermo Jarrell Ash Corporation.
35 In-Situ Method 1004-8-2009, Carbonaceous Biochemical Oxygen Demand (CBOD) Measurement by Optical Probe. 2009. In-Situ Incorporated.
36 Microwave-assisted digestion may be employed for this metal, when analyzed by this methodology. Closed Vessel Microwave Digestion of Wastewater Samples for Determination of Metals. April 16, 1992. CEM Corporation.
37 When determining boron and silica, only plastic, PTFE, or quartz laboratory ware may be used from start until completion of analysis.
38 Only use n -hexane ( n -Hexane—85% minimum purity, 99.0% min. saturated C6 isomers, residue less than 1 mg/L) extraction solvent when determining Oil and Grease parameters—Hexane Extractable Material (HEM), or Silica Gel Treated HEM (analogous to EPA Methods 1664 Rev. A and 1664 Rev. B). Use of other extraction solvents is prohibited.
39 Method PAI-DK01, Nitrogen, Total Kjeldahl, Block Digestion, Steam Distillation, Titrimetric Detection. Revised December 22, 1994. OI Analytical.
40 Method PAI-DK02, Nitrogen, Total Kjeldahl, Block Digestion, Steam Distillation, Colorimetric Detection. Revised December 22, 1994. OI Analytical.
41 Method PAI-DK03, Nitrogen, Total Kjeldahl, Block Digestion, Automated FIA Gas Diffusion. Revised December 22, 1994. OI Analytical.
42 Method 1664 Rev. B is the revised version of EPA Method 1664 Rev. A. U.S. EPA. February 1999, Revision A. Method 1664, n -Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated n -Hexane Extractable Material (SGT-HEM; Non-polar Material) by Extraction and Gravimetry. EPA-821-R-98-002. U.S. EPA. February 2010, Revision B. Method 1664, n -Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated n -Hexane Extractable Material (SGT-HEM; Non-polar Material) by Extraction and Gravimetry. EPA-821-R-10-001.
43 Method 1631, Revision E, Mercury in Water by Oxidation, Purge and Trap, and Cold Vapor Atomic Fluorescence Spectrometry, EPA-821-R-02-019. Revision E. August 2002, U.S. EPA. The application of clean techniques described in EPA's Method 1669: Sampling Ambient Water for Trace Metals at EPA Water Quality Criteria Levels, EPA-821-R-96-011, are recommended to preclude contamination at low-level, trace metal determinations.
44 Method OIA-1677-09, Available Cyanide by Ligand Exchange and Flow Injection Analysis (FIA). 2010. OI Analytical.
45 Open File Report 00-170, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Ammonium Plus Organic Nitrogen by a Kjeldahl Digestion Method and an Automated Photometric Finish that Includes Digest Cleanup by Gas Diffusion. 2000. USGS.
46 Open File Report 93-449, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Chromium in Water by Graphite Furnace Atomic Absorption Spectrophotometry. 1993. USGS.
47 Open File Report 97-198, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Molybdenum by Graphite Furnace Atomic Absorption Spectrophotometry. 1997. USGS.
48 Open File Report 92-146, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Total Phosphorus by Kjeldahl Digestion Method and an Automated Colorimetric Finish That Includes Dialysis. 1992. USGS.
49 Open File Report 98-639, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Arsenic and Selenium in Water and Sediment by Graphite Furnace-Atomic Absorption Spectrometry. 1999. USGS.
50 Open File Report 98-165, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Elements in Whole-water Digests Using Inductively Coupled Plasma-Optical Emission Spectrometry and Inductively Coupled Plasma-Mass Spectrometry. 1998. USGS.
51 Open File Report 93-125, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Inorganic and Organic Constituents in Water and Fluvial Sediments. 1993. USGS.
52 Unless otherwise indicated, all EPA methods, excluding EPA Method 300.1, are published in U.S. EPA. May 1994. Methods for the Determination of Metals in Environmental Samples, Supplement I, EPA/600/R-94/111; or U.S. EPA. August 1993. Methods for the Determination of Inorganic Substances in Environmental Samples, EPA/600/R-93/100. EPA Method 300.1 is U.S. EPA. Revision 1.0, 1997, including errata cover sheet April 27, 1999. Determination of Inorganic Ions in Drinking Water by Ion Chromatography.
53 Styrene divinyl benzene beads ( e.g., AMCO-AEPA-1 or equivalent) and stabilized formazin ( e.g., Hach StablCal TM or equivalent) are acceptable substitutes for formazin.
54 Waters Corp. Now included in ASTM D6508-15, Test Method for Determination of Dissolved Inorganic Anions in Aqueous Matrices Using Capillary Ion Electrophoresis and Chromate Electrolyte. 2015.
55 Kelada-01, Kelada Automated Test Methods for Total Cyanide, Acid Dissociable Cyanide, and Thiocyanate, EPA 821-B-01-009, Revision 1.2, August 2001. US EPA. Note: A 450-W UV lamp may be used in this method instead of the 550-W lamp specified if it provides performance within the quality control (QC) acceptance criteria of the method in a given instrument. Similarly, modified flow cell configurations and flow conditions may be used in the method, provided that the QC acceptance criteria are met.
56 QuikChem Method 10-204-00-1-X, Digestion and Distillation of Total Cyanide in Drinking and Wastewaters using MICRO DIST and Determination of Cyanide by Flow Injection Analysis. Revision 2.2, March 2005. Lachat Instruments.
57 When using sulfide removal test procedures described in EPA Method 335.4, reconstitute particulate that is filtered with the sample prior to distillation.
58 Unless otherwise stated, if the language of this table specifies a sample digestion and/or distillation “followed by” analysis with a method, approved digestion and/or distillation are required prior to analysis.
59 Samples analyzed for available cyanide using OI Analytical method OIA-1677-09 or ASTM method D6888-16 that contain particulate matter may be filtered only after the ligand exchange reagents have been added to the samples, because the ligand exchange process converts complexes containing available cyanide to free cyanide, which is not removed by filtration. Analysts are further cautioned to limit the time between the addition of the ligand exchange reagents and sample filtration to no more than 30 minutes to preclude settling of materials in samples.
60 Analysts should be aware that pH optima and chromophore absorption maxima might differ when phenol is replaced by a substituted phenol as the color reagent in Berthelot Reaction (“phenol-hypochlorite reaction”) colorimetric ammonium determination methods. For example, when phenol is used as the color reagent, pH optimum and wavelength of maximum absorbance are about 11.5 and 635 nm, respectively—see, Patton, C.J. and S.R. Crouch. March 1977. Anal. Chem. 49:464-469. These reaction parameters increase to pH > 12.6 and 665 nm when salicylate is used as the color reagent—see, Krom, M.D. April 1980. The Analyst 105:305-316.
61 If atomic absorption or ICP instrumentation is not available, the aluminon colorimetric method detailed in the 19th Edition of Standard Methods for the Examination of Water and Wastewater may be used. This method has poorer precision and bias than the methods of choice.
62 Easy (1-Reagent) Nitrate Method, Revision November 12, 2011. Craig Chinchilla.
63 Hach Method 10360, Luminescence Measurement of Dissolved Oxygen in Water and Wastewater and for Use in the Determination of BOD 5 and CBOD 5 . Revision 1.2, October 2011. Hach Company. This method may be used to measure dissolved oxygen when performing the methods approved in this table IB for measurement of biochemical oxygen demand (BOD) and carbonaceous biochemical oxygen demand (CBOD).
64 In-Situ Method 1002-8-2009, Dissolved Oxygen (DO) Measurement by Optical Probe. 2009. In-Situ Incorporated.
65 Mitchell Method M5331, Determination of Turbidity by Nephelometry. Revision 1.0, July 31, 2008. Leck Mitchell.
66 Mitchell Method M5271, Determination of Turbidity by Nephelometry. Revision 1.0, July 31, 2008. Leck Mitchell.
67 Orion Method AQ4500, Determination of Turbidity by Nephelometry. Revision 5, March 12, 2009. Thermo Scientific.
68 EPA Method 200.5, Determination of Trace Elements in Drinking Water by Axially Viewed Inductively Coupled Plasma-Atomic Emission Spectrometry, EPA/600/R-06/115. Revision 4.2, October 2003. US EPA.
69 Method 1627, Kinetic Test Method for the Prediction of Mine Drainage Quality, EPA-821-R-09-002. December 2011. US EPA.
70 Techniques and Methods Book 5-B1, Determination of Elements in Natural-Water, Biota, Sediment and Soil Samples Using Collision/Reaction Cell Inductively Coupled Plasma-Mass Spectrometry, Chapter 1, Section B, Methods of the National Water Quality Laboratory, Book 5, Laboratory Analysis, 2006. USGS.
71 Water-Resources Investigations Report 01-4132, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Organic Plus Inorganic Mercury in Filtered and Unfiltered Natural Water with Cold Vapor-Atomic Fluorescence Spectrometry, 2001. USGS.
72 USGS Techniques and Methods 5-B8, Chapter 8, Section B, Methods of the National Water Quality Laboratory Book 5, Laboratory Analysis, 2011 USGS.
73 NECi Method N07-0003, “Nitrate Reductase Nitrate-Nitrogen Analysis,” Revision 9.0, March 2014, The Nitrate Elimination Co., Inc.
74 Timberline Instruments, LLC Method Ammonia-001, “Determination of Inorganic Ammonia by Continuous Flow Gas Diffusion and Conductivity Cell Analysis,” June 2011, Timberline Instruments, LLC.
75 Hach Company Method 10206, “Spectrophotometric Measurement of Nitrate in Water and Wastewater,” Revision 2.1, January 2013, Hach Company.
76 Hach Company Method 10242, “Simplified Spectrophotometric Measurement of Total Kjeldahl Nitrogen in Water and Wastewater,” Revision 1.1, January 2013, Hach Company.
77 National Council for Air and Stream Improvement (NCASI) Method TNTP-W10900, “Total (Kjeldahl) Nitrogen and Total Phosphorus in Pulp and Paper Biologically Treated Effluent by Alkaline Persulfate Digestion,” June 2011, National Council for Air and Stream Improvement, Inc.
78 The pH adjusted sample is to be adjusted to 7.6 for NPDES reporting purposes.
79 I-2057-85 in U.S. Geological Survey Techniques of Water-Resources Investigations, Book 5, Chap. A1, Methods for Determination of Inorganic Substances in Water and Fluvial Sediments, 1989.
80 Methods I-2522-90, I-2540-90, and I-2601-90 in U.S. Geological Survey Open-File Report 93-125, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Inorganic and Organic Constituents in Water and Fluvial Sediments, 1993.
81 Method I-4472-97 in U.S. Geological Survey Open-File Report 98-165, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Inorganic and Organic Constituents in Water and Fluvial Sediments, 1998.
82 FIAlab 100, “Determination of Inorganic Ammonia by Continuous Flow Gas Diffusion and Fluorescence Detector Analysis”, April 4, 2018, FIAlab Instruments, Inc.
83 MACHEREY-NAGEL GmbH and Co. Method 036/038 NANOCOLOR® COD LR/HR, “Spectrophotometric Measurement of Chemical Oxygen Demand in Water and Wastewater”, Revision 1.5, May 2018, MACHEREY-NAGEL GmbH and Co. KG.
84 Please refer to the following applicable Quality Control Sections: Part 2000 Methods, Physical and Aggregate Properties 2020 (2021); Part 3000 Methods, Metals, 3020 (2021); Part 4000 Methods, Inorganic Nonmetallic Constituents, 4020 (2022); Part 5000 Methods, and Aggregate Organic Constituents, 5020 (2022). These Quality Control Standards are available for download at www.standardmethods.org at no charge.
85 Each laboratory may establish its own control limits by performing at least 25 glucose-glutamic acid (GGA) checks over several weeks or months and calculating the mean and standard deviation. The laboratory may then use the mean ± 3 standard deviations as the control limit for future GGA checks. However, GGA acceptance criteria can be no wider than 198 ± 30.5 mg/L for BOD 5 . GGA acceptance criteria for CBOD must be either 198 ± 30.5 mg/L, or the lab may develop control charts under the following conditions: dissolved oxygen uptake from the seed contribution is between 0.6-1.0 mg/L; control charts are performed on at least 25 GGA checks with three standard deviations from the derived mean; the RSD must not exceed 7.5%; and any single GGA value cannot be less than 150 mg/L or higher than 250 mg/L.
86 The approved method is that cited in Standard Methods for the Examination of Water and Wastewater, 14th Edition, 1976.
1. Acidity (as CaCO 3), mg/LElectrometric endpoint or phenolphthalein endpoint2310 B-2020D1067-16I-1020-85. 2
2. Alkalinity (as CaCO 3), mg/LElectrometric or Colorimetric titration to pH 4.5, Manual2320 B-2021D1067-16973.43, 3 I-1030-85. 2
Automatic310.2 (Rev. 1974) 1I-2030-85. 2
3. Aluminum—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 D-2019 or 3111 E-2019I-3051-85. 2
AA furnace3113 B-2020.
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES 36200.5 Rev 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4472-97, 81
Direct Current Plasma (DCP) 36D4190-15See footnote. 34
Colorimetric (Eriochrome cyanine R)3500-Al B-2020.
4. Ammonia (as N), mg/LManual distillation 6 or gas diffusion (pH > 11), followed by any of the following:350.1 Rev. 2.0 (1993)4500-NH 3 B-2021973.49. 3
NesslerizationD1426-15 (A)973.49, 3 I-3520-85. 2
Titration4500-NH 3 C-2021.
Electrode4500-NH 3 D-2021 or E-2021D1426-15 (B)
Manual phenate, salicylate, or other substituted phenols in Berthelot reaction-based methods4500-NH 3 F-2021See footnote. 60
Automated phenate, salicylate, or other substituted phenols in Berthelot reaction-based methods350.1, 30 Rev. 2.0 (1993)4500-NH 3 G-2021, 4500-NH 3 H-2021I-4523-85, 2 I-2522-90. 80
Automated electrodeSee footnote. 7
Ion ChromatographyD6919-17.
Automated gas diffusion, followed by conductivity cell analysisTimberline Ammonia-001. 74
Automated gas diffusion followed by fluorescence detector analysisFIAlab100. 82
5. Antimony—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 B-2019.
AA furnace3113 B-2020.
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES 36200.5 Rev 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20.
ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4472-97. 81
6. Arsenic—Total, 4 mg/LDigestion, 4 followed by any of the following:206.5 (Issued 1978). 1
AA gaseous hydride3114 B-2020 or 3114 C-2020D2972-15 (B)I-3062-85. 2
AA furnace3113 B-2020D2972-15 (C)I-4063-98. 49
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES 36200.5, Rev 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20.
ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4020-05. 70
Colorimetric (SDDC)3500-As B-2020D2972-15 (A)I-3060-85. 2
7. Barium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 D-2019I-3084-85. 2
AA furnace3113 B-2020D4382-18.
ICP/AES 36200.5, Rev 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4472-97. 81
DCP 36See footnote. 34
8. Beryllium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 D-2019 or 3111 E-2019D3645-15 (A)I-3095-85. 2
AA furnace3113 B-2020D3645-15 (B).
STGFAA200.9, Rev. 2.2 (1994).
ICP/AES200.5 Rev 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4472-97. 81
DCPD4190-15See footnote. 34
Colorimetric (aluminon)See footnote 61
9. Biochemical oxygen demand (BOD 5), mg/LDissolved Oxygen Depletion5210 B-2016 85973.44 3 p. 17, 9 I-1578-78, 8 see footnote. 1063
10. Boron—Total, 37 mg/LColorimetric (curcumin)4500-B B-2011I-3112-85. 2
ICP/AES200.5 Rev 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14. 3
DCPD4190-15See footnote. 34
11. Bromide, mg/LElectrodeD1246-16I-1125-85. 2
Ion Chromatography300.0 Rev 2.1 (1993), and 300.1 Rev 1.0 (1997)4110 B-2020, C-2020 or D-2020D4327-17993.30, 3 I-2057-85. 79
CIE/UV4140 B-2020D6508-15D6508 Rev. 2. 54
12. Cadmium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 B-2019 or 3111 C-2019D3557-17 (A or B)974.27 3 p. 37, 9 I-3135-85 2 or I-3136-85. 2
AA furnace3113 B-2020D3557-17 (D)I-4138-89. 51
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES 36200.5 Rev 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-1472-85 2 or I-4471-97. 50
ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4472-97. 81
DCP 36D4190-15See footnote. 34
Voltammetry 11D3557-17 (C).
Colorimetric (Dithizone)3500-Cd D-1990.
13. Calcium—Total, 4 mg/LDigestion 4 followed by any of the following:
AA direct aspiration3111 B-2019 or 3111 D-2019D511-14 (B)I-3152-85. 2
ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16993.14. 3
DCPSee footnote. 34
Titrimetric (EDTA)3500-Ca B-2020D511-14 (A).
Ion ChromatographyD6919-17.
14. Carbonaceous biochemical oxygen demand (CBOD 5), mg/L 12Dissolved Oxygen Depletion with nitrification inhibitor5210 B-2016 85See footnotes. 35 63
15. Chemical oxygen demand (COD), mg/LTitrimetric410.3 (Rev. 1978) 15220 B-2011 or C-2011D1252-06(12) (A)973.46 3 p. 17, 9 I-3560-85. 2
Spectrophotometric, manual or automatic410.4 Rev. 2.0 (1993)5220 D-2011D1252-06(12) (B)See footnotes, 131483 I-3561-85. 2
16. Chloride, mg/LTitrimetric: (silver nitrate)4500-Cl B-2021D512-12 (B)I-1183-85. 2
(Mercuric nitrate)4500-Cl C-2021D512-12 (A)973.51, 3 I-1184-85. 2
Colorimetric: manualI-1187-85. 2
Automated (ferricyanide)4500-Cl E-2021I-2187-85. 2
Potentiometric Titration4500-Cl D-2021.
Ion Selective ElectrodeD512-12 (C).
Ion Chromatography300.0 Rev 2.1 (1993), and 300.1 Rev 1.0 (1997)4110 B-2020 or 4110 C-2020D4327-17993.30, 3 I-2057-90. 51
CIE/UV4140 B-2020D6508-15D6508, Rev. 2. 54
17. Chlorine—Total residual, mg/LAmperometric direct4500-Cl D-2011D1253-14.
Amperometric direct (low level)4500-Cl E-2011.
Iodometric direct4500-Cl B-2011.
Back titration ether end-point 154500-Cl C-2011.
DPD-FAS4500-Cl F-2011.
Spectrophotometric, DPD4500-Cl G-2011.
ElectrodeSee footnote. 16
17A. Chlorine—Free Available, mg/LAmperometric direct4500-Cl D-2011D1253-14.
Amperometric direct (low level)4500-Cl E-2011.
DPD-FAS4500-Cl F-2011.
Spectrophotometric, DPD4500-Cl G-2011.
18. Chromium VI dissolved, mg/L0.45-micron filtration followed by any of the following:
AA chelation-extraction3111 C-2019I-1232-85. 2
Colorimetric (diphenyl-carbazide)3500-Cr B-2020D1687-17 (A)I-1230-85. 2
19. Chromium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 B-2019D1687-17 (B)974.27, 3 I-3236-85. 2
AA chelation-extraction3111 C-2019.
AA furnace3113 B-2020D1687-17 (C)I-3233-93. 46
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES 36200.5 Rev 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20.
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4020-05 70 I-4472-97. 81
DCP 36D4190-15See footnote. 34
Colorimetric (diphenyl-carbazide)3500-Cr B-2020.
20. Cobalt—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 B-2019 or 3111 C-2019D3558-15 (A or B)p. 37, 9 I-323985. 2
AA furnace3113 B-2020D3558-15 (C)I-4243-89. 51
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4020-05 70 I-4472-97. 81
DCPD4190-15See footnote. 34
21. Color, platinum cobalt units or dominant wavelength, hue, luminance purityColorimetric (ADMI)2120 F-2021. 78
Platinum cobalt visual comparison2120 B-2021I-1250-85. 2
SpectrophotometricSee footnote. 18
22. Copper—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 B-2019 or 3111 C-2019D1688-17 (A or B)974.27, 3 p. 37, 9 I-3270-85 2 or I-3271-85. 2
AA furnace3113 B-2020D1688-17 (C)I-4274-89. 51
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES 36200.5 Rev 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4020-05, 70 I-4472-97. 81
DCP 36D4190-15See footnote. 34
Colorimetric (Neocuproine)3500-Cu B-2020.
Colorimetric (Bathocuproine)3500-Cu C-2020See footnote. 19
23. Cyanide—Total, mg/LAutomated UV digestion/distillation and ColorimetryKelada-01. 55
Segmented Flow Injection, In-Line Ultraviolet Digestion, followed by gas diffusion amperometry4500-CN P-2021D7511-12 (17).
Manual distillation with MgCl 2 , followed by any of the following:335.4 Rev. 1.0 (1993) 574500-CN B-2021 and C-2021D2036-09(15)(A), D7284-2010-204-00-1-X. 56
Flow Injection, gas diffusion amperometryD2036-09(15)(A) D7284-20.
Titrimetric4500-CN D-2021D2036-09(15)(A)See footnote 9 p. 22.
Spectrophotometric, manual4500-CN E-2021D2036-09(15)(A)I-3300-85. 2
Semi-Automated 20335.4 Rev. 1.0 (1993) 574500-CN N-202110-204-00-1-X, 56 I-4302-85. 2
Ion ChromatographyD2036-09(15)(A).
Ion Selective Electrode4500-CN F-2021D2036-09(15)(A).
24. Cyanide—Available, mg/LCyanide Amenable to Chlorination (CATC); Manual distillation with MgCl 2 , followed by Titrimetric or Spectrophotometric4500-CN G-2021D2036-09(15)(B).
Flow injection and ligand exchange, followed by gas diffusion amperometry 594500-CN Q-2021D6888-16OIA-1677-09. 44
Automated Distillation and Colorimetry (no UV digestion)Kelada-01. 55
24A. Cyanide—Free, mg/LFlow Injection, followed by gas diffusion amperometry4500-CN R-2021D7237-18 (A)OIA-1677-09. 44
Manual micro-diffusion and colorimetryD4282-15.
25. Fluoride—Total, mg/LManual distillation, 6 followed by any of the following:4500-F B-2021D1179-16 (A).
Electrode, manual4500-F C-2021D1179-16 (B).
Electrode, automated4500-F G-2021I-4327-85. 2
Colorimetric, (SPADNS)4500-F D-2021.
Automated complexone4500-F E-2021.
Ion Chromatography300.0 Rev 2.1 (1993) and 300.1 Rev 1.0 (1997)4110 B-2020 or C-2020D4327-17993.30. 3
CIE/UV4140 B-2020D6508-15D6508, Rev. 2. 54
26. Gold—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 B-2019.
AA furnace231.2 (Issued 1978) 13113 B-2020.
ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16993.14. 3
DCPSee footnote. 34
27. Hardness—Total (as CaCO (3) , mg/LAutomated colorimetric130.1 (Issued 1971). 1
Titrimetric (EDTA)2340 C-2021D1126-17973.52B, 3 I-1338-85. 2
Ca plus Mg as their carbonates, by any approved method for Ca and Mg (See Parameters 13 and 33), provided that the sum of the lowest point of quantitation for Ca and Mg is below the NPDES permit requirement for Hardness.2340 B-2021.
28. Hydrogen ion (pH), pH unitsElectrometric measurement4500-H + B-2021D1293-18 (A or B)973.41, 3 I-1586-85. 2
Automated electrode150.2 (Dec. 1982) 1See footnote 21 I-2587-85. 2
29. Iridium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 B-2019.
AA furnace235.2 (Issued 1978). 1
ICP/MS3125 B-2020.
30. Iron—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 B-2019 or 3111 C-2019D1068-15 (A)974.27, 3 I-3381-85. 2
AA furnace3113 B-2020D1068-15 (B).
STGFAA200.9, Rev. 2.2 (1994).
ICP/AES 36200.5 Rev. 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16993.14. 3
DCP 36D4190-15See footnote. 34
Colorimetric (Phenanthroline)3500-Fe B-2011D1068-15 (C)See footnote. 22
31. Kjeldahl Nitrogen 5 —Total (as N), mg/LManual digestion 20 and distillation or gas diffusion, followed by any of the following:4500-N org B-2021 or C-2021 and 4500-NH 3 B-2021D3590-17 (A)I-4515-91. 45
Titration4500-NH 3 C-2021973.48. 3
NesslerizationD1426-15 (A).
Electrode4500-NH 3 D-2021 or E-2021D1426-15 (B).
Semi-automated phenate350.1 Rev. 2.0 (1993)4500-NH 3 G-2021 or 4500-NH 3 H-2021.
Manual phenate, salicylate, or other substituted phenols in Berthelot reaction based methods4500-NH 3 F-2021See footnote. 60
Automated gas diffusion, followed by conductivity cell analysisTimberline Ammonia-001. 74
Automated gas diffusion followed by fluorescence detector analysisFIAlab 100. 82
Automated Methods for TKN that do not require manual distillation.
Automated phenate, salicylate, or other substituted phenols in Berthelot reaction-based methods colorimetric (auto digestion and distillation)351.1 (Rev. 1978) 1I-4551-78. 8
Semi-automated block digestor colorimetric (distillation not required)351.2 Rev. 2.0 (1993)4500-N org D-2021D3590-17 (B)I-4515-91. 45
Block digester, followed by Auto distillation and TitrationSee footnote. 39
Block digester, followed by Auto distillation and NesslerizationSee footnote. 40
Block Digester, followed by Flow injection gas diffusion (distillation not required)See footnote. 41
Digestion with peroxdisulfate, followed by Spectrophotometric (2,6-dimethyl phenol)Hach 10242. 76
Digestion with persulfate, followed by ColorimetricNCASI TNTP W10900. 77
32. Lead—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 B-2019 or 3111 C-2019D3559-15 (A or B)974.27, 3 I-3399-85. 2
AA furnace3113 B-2020D3559-15 (D)I-4403-89. 51
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES 36200.5 Rev. 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4472-97. 81
DCP 36D4190-15See footnote. 34
Voltammetry 11D3559-15 (C).
Colorimetric (Dithizone)3500-Pb B-2020.
33. Magnesium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 B-2019D511-14 (B)974.27, 3 I-3447-85. 2
ICP/AES200.5 Rev. 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14. 3
DCPSee footnote. 34
Ion ChromatographyD6919-17.
34. Manganese—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 B-2019 or 3111 C-2019D858-17 (A or B)974.27, 3 I-3454-85. 2
AA furnace3113 B-2020D858-17 (C).
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES 36200.5, Rev. 4.2 (2003); 68 200.7, Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4472-97. 81
DCP 36D4190-15See footnote. 34
Colorimetric (Persulfate)3500-Mn B-2020920.203. 3
Colorimetric (Periodate)See footnote. 23
35. Mercury—Total, mg/LCold vapor, Manual245.1 Rev. 3.0 (1994)3112 B-2020D3223-17977.22, 3 I-3462-85. 2
Cold vapor, Automated245.2 (Issued 1974). 1
Cold vapor atomic fluorescence spectrometry (CVAFS)245.7 Rev. 2.0 (2005) 17I-4464-01. 71
Purge and Trap CVAFS1631E. 43
36. Molybdenum—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 D-2019I-3490-85. 2
AA furnace3113 B-2020I-3492-96. 47
ICP/AES200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4472-97. 81
DCPSee footnote. 34
37. Nickel—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 B-2019 or 3111 C-2019D1886-14 (A or B)I-3499-85. 2
AA furnace3113 B-2020D1886-14 (C)I-4503-89. 51
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES 36200.5 Rev. 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4020-05, 70 I-4472-97. 81
DCP 36D4190-15See footnote. 34
38. Nitrate (as N), mg/LIon Chromatography300.0 Rev. 2.1 (1993) and 300.1 Rev. 1.0 (1997)4110 B-2020 or C-2020D4327-17993.30. 3
CIE/UV4140 B-2020D6508-15D6508, Rev. 2. 54
Ion Selective Electrode4500-NO 3 D-2019.
Colorimetric (Brucine sulfate)352.1 (Issued 1971) 1973.50, 3 419D, 86 p. 28. 9
Spectrophotometric (2,6-dimethylphenol)Hach 10206. 75
Nitrate-nitrite N minus Nitrite N (see parameters 39 and 40).
39. Nitrate-nitrite (as N), mg/LCadmium reduction, Manual4500-NO 3 E-2019D3867-16 (B).
Cadmium reduction, Automated353.2 Rev. 2.0 (1993)4500-NO 3 F-2019 or 4500-NO 3 I-2019D3867-16 (A)I-2545-90. 51
Automated hydrazine4500-NO 3 H-2019.
Reduction/ColorimetricSee footnote. 62
Ion Chromatography300.0 Rev. 2.1 (1993) and 300.1 Rev. 1.0 (1997)4110 B-2020 or C-2020D4327-17993.30. 3
CIE/UV4140 B-2020D6508-15D6508, Rev. 2. 54
Enzymatic reduction, followed by automated colorimetric determinationD7781-14I-2547-11, 72 I-2548-11, 72 N07-0003. 73
Enzymatic reduction, followed by manual colorimetric determination4500-NO 3 J-2018.
Spectrophotometric (2,6-dimethylphenol)Hach 10206. 75
40. Nitrite (as N), mg/LSpectrophotometric: Manual4500-NO 2 B-2021See footnote. 25
Automated (Diazotization)I-4540-85 2 see footnote, 62 I-2540-90. 80
Automated (*bypass cadmium reduction)353.2 Rev. 2.0 (1993)4500-NO 3 F-2019, 4500-NO 3 I-2019D3867-16 (A)I-4545-85. 2
Manual (*bypass cadmium or enzymatic reduction)4500-NO 3 E-2019, 4500-NO 3 J-2018D3867-16 (B).
Ion Chromatography300.0 Rev. 2.1 (1993) and 300.1 Rev. 1.0 (1997)4110 B-2020 or C-2020D4327-17993.30. 3
CIE/UV4140 B-2020D6508-15D6508, Rev. 2. 54
Automated (*bypass Enzymatic reduction)D7781-14I-2547-11, 72 I-2548-11, 72 N07-0003. 73
41. Oil and grease—Total recoverable, mg/LHexane extractable material (HEM): n -Hexane extraction and gravimetry1664 Rev. A 1664 Rev. B 425520 B or G-2021. 38
Silica gel treated HEM (SGT-HEM): Silica gel treatment and gravimetry1664 Rev. A, 1664 Rev. B 425520 B or G-2021 38 and 5520 F-2021. 38
42. Organic carbon—Total (TOC), mg/LCombustion5310 B-2014D7573-18a e1973.47, 3 p. 14. 24
Heated persulfate or UV persulfate oxidation5310 C-2014, 5310 D-2011D4839-03(17)973.47, 3, p. 14. 24
43. Organic nitrogen (as N), mg/LTotal Kjeldahl N (Parameter 31) minus ammonia N (Parameter 4).
44. Ortho-phosphate (as P), mg/LAscorbic acid method:
Automated365.1 Rev. 2.0 (1993)4500-P F-2021 or G-2021973.56, 3 I-4601-85, 2 I-2601-90. 80
Manual, single-reagent4500-P E-2021D515-88 (A)973.55. 3
Manual, two-reagent365.3 (Issued 1978). 1
Ion Chromatography300.0 Rev. 2.1 (1993) and 300.1 Rev. 1.0 (1997)4110 B-2020 or C-2020D4327-17993.30. 3
CIE/UV4140 B-2020D6508-15D6508, Rev. 2. 54
45. Osmium—Total 4 , mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 D-2019.
AA furnace252.2 (Issued 1978). 1
46. Oxygen, dissolved, mg/LWinkler (Azide modification)4500-O (B-F)-2021D888-18 (A)973.45B, 3 I-1575-78. 8
Electrode4500-O G-2021D888-18 (B)I-1576-78. 8
Luminescence-Based Sensor4500-O H-2021D888-18 (C)See footnotes.
47. Palladium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 B-2019.
AA furnace253.2 (Issued 1978). 1
ICP/MS3125 B-2020.
DCPSee footnote. 34
48. Phenols, mg/LManual distillation, 26 followed by any of the following:420.1 (Rev. 1978) 15530 B-2021D1783-01(12)
Colorimetric (4AAP) manual420.1 (Rev. 1978) 15530 D-2021 27D1783-01(12) (A or B).
Automated colorimetric (4AAP)420.4 Rev. 1.0 (1993).
49. Phosphorus (elemental), mg/LGas-liquid chromatographySee footnote. 28
50. Phosphorus—Total, mg/LDigestion, 20 followed by any of the following:4500-P B (5)-2021973.55. 3
Manual365.3 (Issued 1978) 14500-P E-2021D515-88 (A).
Automated ascorbic acid reduction365.1 Rev. 2.0 (1993)4500-P (F-H)-2021973.56, 3 I-4600-85. 2
ICP/AES 436200.7Rev. 4.4 (1994)3120 B-2020I-4471-97. 50
Semi-automated block digestor (TKP digestion)365.4 (Issued 1974) 1D515-88 (B)I-4610-91. 48
Digestion with persulfate, followed by ColorimetricNCASI TNTP W10900. 77
51. Platinum—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 B-2019.
AA furnace255.2 (Issued 1978). 1
ICP/MS3125 B-2020.
DCPSee footnote. 34
52. Potassium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 B-2019973.5, 3 I-3630-85. 2
ICP/AES200.7 Rev. 4.4 (1994)3120 B-2020.
ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16993.14. 3
Flame photometric3500-K B-2020.
Electrode3500-K C-2020.
Ion ChromatographyD6919-17.
53. Residue—Total, mg/LGravimetric, 103-105°2540 B-2020I-3750-85. 2
54. Residue—filterable, mg/LGravimetric, 180°2540 C-2020D5907-18 (B)I-1750-85. 2
55. Residue—non-filterable (TSS), mg/LGravimetric, 103-105° post-washing of residue2540 D-2020D5907-18 (A)I-3765-85. 2
56. Residue—settleable, mg/LVolumetric (Imhoff cone), or gravimetric2540 F-2020.
57. Residue—Volatile, mg/LGravimetric, 550°160.4 (Issued 1971) 12540 E-2020I-3753-85. 2
58. Rhodium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration, or3111 B-2019.
AA furnace265.2 (Issued 1978). 1
ICP/MS3125 B-2020.
59. Ruthenium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration, or3111 B-2019.
AA furnace267.2. 1
ICP/MS3125 B-2020.
60. Selenium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA furnace3113 B-2020D3859-15 (B)I-4668-98. 49
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES 36200.5 Rev 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20.
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4020-05 70 I-4472-97. 81
AA gaseous hydride3114 B-2020, or 3114 C-2020D3859-15 (A)I-3667-85. 2
61. Silica—Dissolved, 37 mg/L0.45-micron filtration followed by any of the following:
Colorimetric, Manual4500-SiO 2 C-2021D859-16I-1700-85. 2
Automated (Molybdosilicate)4500-SiO 2 E-2021 or F-2021I-2700-85. 2
ICP/AES200.5 Rev. 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14. 3
62. Silver—Total, 4 31 mg/LDigestion, 4 29 followed by any of the following:
AA direct aspiration3111 B-2019 or 3111 C-2019974.27, 3 p. 37, 9 I-3720-85. 2
AA furnace3113 B-2020I-4724-89. 51
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES200.5 Rev. 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4472-97. 81
DCPSee footnote. 34
63. Sodium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 B-2019973.54, 3 I-3735-85. 2
ICP/AES200.5 Rev. 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14. 3
DCPSee footnote. 34
Flame photometric3500-Na B-2020.
Ion ChromatographyD6919-17.
64. Specific conductance, micromhos/cm at 25 °CWheatstone bridge120.1 (Rev. 1982) 12510 B-2021D1125-95(99) (A)973.40, 3 I-2781-85. 2
65. Sulfate (as SO 4), mg/LAutomated colorimetric375.2 Rev. 2.0 (1993)4500-SO 42 F-2021 or G-2021.
Gravimetric4500-SO 42 C-2021 or D-2021925.54. 3
Turbidimetric4500-SO 42 E-2021D516-16.
Ion Chromatography300.0 Rev. 2.1 (1993) and 300.1 Rev. 1.0 (1997)4110 B-2020 or C-2020D4327-17993.30, 3 I-4020-05. 70
CIE/UV4140 B-2020D6508-15D6508 Rev. 2. 54
66. Sulfide (as S), mg/LSample Pretreatment4500-S 2 B, C-2021.
Titrimetric (iodine)4500-S 2 F-2021I-3840-85. 2
Colorimetric (methylene blue)4500-S 2 D-2021.
Ion Selective Electrode4500-S 2 G-2021D4658-15.
67. Sulfite (as SO 3), mg/LTitrimetric (iodine-iodate)4500-SO 32 B-2021.
68. Surfactants, mg/LColorimetric (methylene blue)5540 C-2021D2330-20.
69. Temperature, °CThermometric2550 B-2010See footnote. 32
70. Thallium-Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 B-2019.
AA furnace279.2 (Issued 1978) 13113 B-2020.
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES200.7 Rev. 4.4 (1994)3120 B-2020D1976-20.
ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4471-97 50 I-4472-97. 81
71. Tin—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 B-2019I-3850-78. 8
AA furnace3113 B-2020.
STGFAA200.9 Rev. 2.2 (1994).
ICP/AES200.5 Rev. 4.2 (2003), 68 200.7 Rev. 4.4 (1994).
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14. 3
72. Titanium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 D-2019.
AA furnace283.2 (Issued 1978). 1
ICP/AES200.7 Rev. 4.4 (1994).
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14. 3
DCPSee footnote. 34
73. Turbidity, NTU 53Nephelometric180.1, Rev. 2.0 (1993)2130 B-2020D1889-00I-3860-85, 2 see footnotes. 656667
74. Vanadium—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration3111 D-2019.
AA furnace3113 B-2020D3373-17.
ICP/AES200.5 Rev. 4.2 (2003), 68 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4020-05. 70
DCPD4190-15See footnote. 34
Colorimetric (Gallic Acid)3500-V B-2011.
75. Zinc—Total, 4 mg/LDigestion, 4 followed by any of the following:
AA direct aspiration 363111 B-2019 or 3111 C-2019D1691-17 (A or B)974.27 3 p. 37, 9 I-3900-85. 2
AA furnace289.2 (Issued 1978). 1
ICP/AES 36200.5 Rev. 4.2 (2003), 68 200.7, Rev. 4.4 (1994)3120 B-2020D1976-20I-4471-97. 50
ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16993.14, 3 I-4020-05, 70 I-4472-97. 81
DCP 36D4190-15See footnote. 34
Colorimetric (Zincon)3500 Zn B-2020See footnote. 33
76. Acid Mine Drainage1627. 69

Table IC—List of Approved Test Procedures for Non-Pesticide Organic Compounds
Parameter 1MethodEPA 27Standard methods 17ASTMOther
1. AcenaphtheneGC610
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
2. AcenaphthyleneGC610
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
3. AcroleinGC603
GC/MS624.1 4 , 1624B.
4. AcrylonitrileGC603
GC/MS624.1 4 , 1624BO-4127-96. 13
5. AnthraceneGC610
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
6. BenzeneGC6026200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
7. BenzidineSpectro-photometricSee footnote 3 p.1.
GC/MS625.1 5 , 1625B6410 B-2020.
HPLC605
8. Benzo(a)anthraceneGC610
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
9. Benzo(a)pyreneGC610
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
10. Benzo(b)fluorantheneGC610
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
11. Benzo(g,h,i)peryleneGC610
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
12. Benzo(k)fluorantheneGC610
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
13. Benzyl chlorideGCSee footnote 3 p. 130.
GC/MSSee footnote 6 p. S102.
14. Butyl benzyl phthalateGC606
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
15. bis(2-Chloroethoxy) methaneGC611
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
16. bis(2-Chloroethyl) etherGC611
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
17. bis(2-Ethylhexyl) phthalateGC606
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
18. BromodichloromethaneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
19. BromoformGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
20. BromomethaneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
21. 4-Bromophenyl phenyl etherGC611
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
22. Carbon tetrachlorideGC6016200 C-2020See footnote 3 p. 130.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
23. 4-Chloro-3-methyl phenolGC6046420 B-2021.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
24. ChlorobenzeneGC601, 6026200 C-2020See footnote 3 p. 130.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 O-4436-16. 14
25. ChloroethaneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96. 13
26. 2-Chloroethylvinyl etherGC601
GC/MS624.1, 1624B.
27. ChloroformGC6016200 C-2020See footnote 3 p. 130.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
28. ChloromethaneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
29. 2-ChloronaphthaleneGC612
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
30. 2-ChlorophenolGC6046420 B-2021.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
31. 4-Chlorophenyl phenyl etherGC611
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
32. ChryseneGC610
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
33. Dibenzo(a,h)anthraceneGC610
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
34. DibromochloromethaneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
35. 1,2-DichlorobenzeneGC601, 6026200 C-2020.
GC/MS624.1, 1625B6200 B-2020See footnote 9 p. 27, O-4127-96 13 , O-4436-16. 14
36. 1,3-DichlorobenzeneGC601, 6026200 C-2020.
GC/MS624.1, 1625B6200 B-2020See footnote 9 p. 27, O-4127-96. 13
37. 1,4-DichlorobenzeneGC601, 6026200 C-2020.
GC/MS624.1, 1625B6200 B-2020See footnote 9 p. 27, O-4127-96 13 , O-4436-16. 14
38. 3,3′-DichlorobenzidineGC/MS625.1, 1625B6410 B-2020.
HPLC605.
39. DichlorodifluoromethaneGC601.
GC/MS6200 B-2020O-4127-96 13 , O-4436-16. 14
40. 1,1-DichloroethaneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
41. 1,2-DichloroethaneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
42. 1,1-DichloroetheneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
43. trans -1,2-DichloroetheneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
44. 2,4-DichlorophenolGC6046420 B-2021.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
45. 1,2-DichloropropaneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 O-4436-16. 14
46. cis -1,3-DichloropropeneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
47. trans -1,3-DichloropropeneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
48. Diethyl phthalateGC606.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
49. 2,4-DimethylphenolGC6046420 B-2021.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
50. Dimethyl phthalateGC606.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
51. Di- n -butyl phthalateGC606.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
52. Di- n -octyl phthalateGC606.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
53. 2, 4-DinitrophenolGC6046420 B-2021See footnote 9 p. 27.
GC/MS625.1, 1625B6410 B-2020.
54. 2,4-DinitrotolueneGC609.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
55. 2,6-DinitrotolueneGC609.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
56. EpichlorohydrinGCSee footnote 3 p. 130.
GC/MSSee footnote 6 p. S102.
57. EthylbenzeneGC6026200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
58. FluorantheneGC610.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
59. FluoreneGC610.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
60. 1,2,3,4,6,7,8-Heptachloro-dibenzofuranGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
61. 1,2,3,4,7,8,9-Heptachloro-dibenzofuranGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
62. 1,2,3,4,6,7,8- Heptachloro-dibenzo- p -dioxinGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
63. HexachlorobenzeneGC612.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
64. HexachlorobutadieneGC612.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27, O-4127-96. 13
65. HexachlorocyclopentadieneGC612.
GC/MS625.1 5 , 1625B6410 B-2020See footnote 9 , p. 27, O-4127-96. 13
66. 1,2,3,4,7,8-Hexachloro-dibenzofuranGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
67. 1,2,3,6,7,8-Hexachloro-dibenzofuranGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
68. 1,2,3,7,8,9-Hexachloro-dibenzofuranGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
69. 2,3,4,6,7,8-Hexachloro-dibenzofuranGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
70. 1,2,3,4,7,8-Hexachloro-dibenzo- p -dioxinGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
71. 1,2,3,6,7,8-Hexachloro-dibenzo- p -dioxinGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
72. 1,2,3,7,8,9-Hexachloro-dibenzo- p -dioxinGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
73. HexachloroethaneGC612.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27, O-4127-96. 13
74. Indeno(1,2,3-c,d) pyreneGC610.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
75. IsophoroneGC609.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
76. Methylene chlorideGC6016200 C-2020See footnote 3 p. 130.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
77. 2-Methyl-4,6-dinitrophenolGC6046420 B-2021.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
78. NaphthaleneGC610.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021.
79. NitrobenzeneGC609.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLCD4657-92 (98).
80. 2-NitrophenolGC6046420 B-2021.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
81. 4-NitrophenolGC6046420 B-2021.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
82. N-NitrosodimethylamineGC607.
GC/MS625.1 5 , 1625B6410 B-2020See footnote 9 p. 27.
83. N-Nitrosodi- n -propylamineGC607.
GC/MS625.1 5 , 1625B6410 B-2020See footnote 9 p. 27.
84. N-NitrosodiphenylamineGC607.
GC/MS625.1 5 , 1625B6410 B-2020See footnote 9 p. 27.
85. OctachlorodibenzofuranGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
86. Octachlorodibenzo- p -dioxinGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
87. 2,2′-oxybis(1-chloropropane) 12 [also known as bis(2-Chloro-1-methylethyl) ether]GC611.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
88. PCB-1016GC608.3See footnote 3 p. 43, see footnote. 8
GC/MS625.16410 B-2020.
89. PCB-1221GC608.3See footnote 3 p. 43, see footnote. 8
GC/MS625.16410 B-2020.
90. PCB-1232GC608.3See footnote 3 p. 43, see footnote. 8
GC/MS625.16410 B-2020.
91. PCB-1242GC608.3See footnote 3 p. 43, see footnote. 8
GC/MS625.16410 B-2020.
92. PCB-1248GC608.3See footnote 3 p. 43, see footnote. 8
GC/MS625.16410 B-2020.
93. PCB-1254GC608.3See footnote 3 p. 43, see footnote. 8
GC/MS625.16410 B-2020.
94. PCB-1260GC608.3See footnote 3 p. 43, see footnote. 8
GC/MS625.16410 B-2020.
95. 1,2,3,7,8-Pentachloro-dibenzofuranGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
96. 2,3,4,7,8-Pentachloro-dibenzofuranGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
97. 1,2,3,7,8-Pentachloro-dibenzo- p -dioxinGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
98. PentachlorophenolGC6046420 B-2021See footnote 3 p. 140.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
99. PhenanthreneGC610.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
100. PhenolGC6046420 B-2021.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
101. PyreneGC610.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
HPLC6106440 B-2021D4657-92 (98).
102. 2,3,7,8-Tetrachloro-dibenzofuranGC/MS1613B 10SGS AXYS 16130 15 , PAM 16130-SSI. 16
103. 2,3,7,8-Tetrachloro-dibenzo- p -dioxinGC/MS613, 625.1 5 , 1613BSGS AXYS 16130 15 , PAM 16130-SSI. 16
104. 1,1,2,2-TetrachloroethaneGC6016200 C-2020See footnote 3 p. 130.
GC/MS624.1, 1624B6200 B-2020O-4127-96. 13
105. TetrachloroetheneGC6016200 C-2020See footnote 3 p. 130.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
106. TolueneGC6026200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
107. 1,2,4-TrichlorobenzeneGC612See footnote 3 p. 130.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27, O-4127-96 13 , O-4436-16. 14
108. 1,1,1-TrichloroethaneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
109. 1,1,2-TrichloroethaneGC6016200 C-2020See footnote 3 p. 130.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
110. TrichloroetheneGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
111. TrichlorofluoromethaneGC6016200 C-2020.
GC/MS624.16200 B-2020O-4127-96. 13
112. 2,4,6-TrichlorophenolGC6046420 B-2021.
GC/MS625.1, 1625B6410 B-2020See footnote 9 p. 27.
113. Vinyl chlorideGC6016200 C-2020.
GC/MS624.1, 1624B6200 B-2020O-4127-96 13 , O-4436-16. 14
114. NonylphenolGC/MSD7065-17.
115. Bisphenol A (BPA)GC/MSD7065-17.
116. p-tert -Octylphenol (OP)GC/MSD7065-17.
117. Nonylphenol Monoethoxylate (NP1EO)GC/MSD7065-17.
118. Nonylphenol Diethoxylate (NP2EO)GC/MSD7065-17.
119. Adsorbable Organic Halides (AOX)Adsorption and Coulometric Titration1650. 11
120. Chlorinated PhenolicsIn Situ Acetylation and GC/MS1653. 11
Table IC notes:

1 All parameters are expressed in micrograms per liter (µg/L) except for Method 1613B, in which the parameters are expressed in picograms per liter (pg/L).
2 The full text of Methods 601-613, 1613B, 1624B, and 1625B are provided at appendix A, Test Procedures for Analysis of Organic Pollutants. The standardized test procedure to be used to determine the method detection limit (MDL) for these test procedures is given at appendix B of this part, Definition and Procedure for the Determination of the Method Detection Limit. These methods are available at: https://www.epa.gov/cwa-methods as individual PDF files.
3 Methods for Benzidine: Chlorinated Organic Compounds, Pentachlorophenol and Pesticides in Water and Wastewater. September 1978. U.S. EPA.
4 Method 624.1 may be used for quantitative determination of acrolein and acrylonitrile, provided that the laboratory has documentation to substantiate the ability to detect and quantify these analytes at levels necessary to comply with any associated regulations. In addition, the use of sample introduction techniques other than simple purge-and-trap may be required. QC acceptance criteria from Method 603 should be used when analyzing samples for acrolein and acrylonitrile in the absence of such criteria in Method 624.1.
5 Method 625.1 may be extended to include benzidine, hexachlorocyclopentadiene, N-nitrosodimethylamine, N-nitrosodi- n -propylamine, and N-nitrosodiphenylamine. However, when they are known to be present, Methods 605, 607, and 612, or Method 1625B, are preferred methods for these compounds. Method 625.1 may be applied to 2,3,7,8-Tetrachloro-dibenzo- p -dioxin for screening purposes only.
6 Selected Analytical Methods Approved and Cited by the United States Environmental Protection Agency, Supplement to the 15th Edition of Standard Methods for the Examination of Water and Wastewater. 1981. American Public Health Association (APHA).
7 Each analyst must make an initial, one-time demonstration of their ability to generate acceptable precision and accuracy with Methods 601-603, 1624B, and 1625B in accordance with procedures in Section 8.2 of each of these methods. Additionally, each laboratory, on an on-going basis must spike and analyze 10% (5% for Methods 624.1 and 625.1 and 100% for methods 1624B and 1625B) of all samples to monitor and evaluate laboratory data quality in accordance with Sections 8.3 and 8.4 of these methods. When the recovery of any parameter falls outside the quality control (QC) acceptance criteria in the pertinent method, analytical results for that parameter in the unspiked sample are suspect. The results should be reported but cannot be used to demonstrate regulatory compliance. If the method does not contain QC acceptance criteria, control limits of ±three standard deviations around the mean of a minimum of five replicate measurements must be used. These quality control requirements also apply to the Standard Methods, ASTM Methods, and other methods cited.
8 Organochlorine Pesticides and PCBs in Wastewater Using Empore TM Disk. Revised October 28, 1994. 3M Corporation.
9 Method O-3116-87 is in Open File Report 93-125, Methods of Analysis by U.S. Geological Survey National Water Quality Laboratory—Determination of Inorganic and Organic Constituents in Water and Fluvial Sediments. 1993. USGS.
10 Analysts may use Fluid Management Systems, Inc. Power-Prep system in place of manual cleanup provided the analyst meets the requirements of Method 1613B (as specified in Section 9 of the method) and permitting authorities. Method 1613, Revision B, Tetra- through Octa-Chlorinated Dioxins and Furans by Isotope Dilution HRGC/HRMS. Revision B, 1994. U.S. EPA. The full text of this method is provided in appendix A to this part and at https://www.epa.gov/cwa-methods/approved-cwa-test-methods-organic-compounds.
11 Method 1650, Adsorbable Organic Halides by Adsorption and Coulometric Titration. Revision C, 1997 U.S. EPA. Method 1653, Chlorinated Phenolics in Wastewater by In Situ Acetylation and GCMS. Revision A, 1997 U.S. EPA. The full text for both of these methods is provided at appendix A in part 430 of this chapter, The Pulp, Paper, and Paperboard Point Source Category.
12 The compound was formerly inaccurately labeled as 2,2′-oxybis(2-chloropropane) and bis(2-chloroisopropyl) ether. Some versions of Methods 611, and 1625 inaccurately list the analyte as “bis(2-chloroisopropyl) ether,” but use the correct CAS number of 108-60-1.
13 Method O-4127-96, U.S. Geological Survey Open-File Report 97-829, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of 86 volatile organic compounds in water by gas chromatography/mass spectrometry, including detections less than reporting limits,1998, USGS.
14 Method O-4436-16 U.S. Geological Survey Techniques and Methods, book 5, chap. B12, Determination of heat purgeable and ambient purgeable volatile organic compounds in water by gas chromatography/mass spectrometry, 2016, USGS.
15 SGS AXYS Method 16130, “Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo- p -Dioxins and Dibenzofurans (CDDs/CDFs) Using Waters and Agilent Gas Chromatography-Tandem-Mass Spectrometry (GC/MS/MS), Revision 1.0” is available at: https://www.sgsaxys.com/wp-content/uploads/2022/09/SGS-AXYS-Method-16130-Rev-1.0.pdf.
16 Pace Analytical Method PAM-16130-SSI, “Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo- p -Dioxins and Dibenzofurans (CDDs/CDFs) Using Shimadzu Gas Chromatography Mass Spectrometry (GC-MS/MS), Revision 1.1,” is available at: pacelabs.com.
17 Please refer to the following applicable Quality Control Section: Part 6000 Individual Organic Compounds, 6020 (2019). The Quality Control Standards are available for download at standardmethods.org at no charge.

Table ID—List of Approved Test Procedures for Pesticides 1
ParameterMethodEPAStandard methods 15ASTMOther
1. AldrinGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96 (02)See footnote 3 p. 7, see footnote 4 O-3104-83, see footnote 8 3M0222.
GC/MS625.16410 B-2020.
2. AmetrynGC507, 619See footnote 3 p. 83, see footnote 9 O-3106-93, see footnote 6 p. S68.
GC/MS525.2, 625.1See footnote 14 O-1121-91.
3. AminocarbTLCSee footnote 3 p. 94, see footnote 6 p. S60.
HPLC632.
4. AtratonGC619See footnote 3 p. 83, see footnote 6 p. S68.
GC/MS625.1.
5. AtrazineGC507, 619, 608.3See footnote 3 p. 83, see footnote 6 p. S68, see footnote 9 O-3106-93.
HPLC/MSSee footnote 12 O-2060-01.
GC/MS525.1, 525.2, 625.1See footnote 11 O-1126-95.
6. Azinphos methylGC614, 622, 1657See footnote 3 p. 25, see footnote 6 p. S51.
GC-MS625.1See footnote 11 O-1126-95.
7. BarbanTLCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
GC/MS625.1.
8. α-BHCGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 8 3M0222.
GC/MS625.1 56410 B-2020See footnote 11 O-1126-95.
9. β-BHCGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 8 3M0222.
GC/MS625.16410 B-2020.
10. δ-BHCGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 8 3M0222.
GC/MS625.16410 B-2020.
11. γ-BHC (Lindane)GC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 , O-3104-83, see footnote 8 3M0222.
GC/MS625.1 56410 B-2020See footnote 11 , O-1126-95.
12. CaptanGC617, 608.36630 B-2021D3086-90, D5812-96(02)See footnote 3 p. 7.
13. CarbarylTLCSee footnote 3 p. 94, see footnote 6 p. S60.
HPLC531.1, 632.
HPLC/MS553See footnote 12 O-2060-01.
GC/MS625.1See footnote 11 O-1126-95.
14. CarbophenothionGC617, 608.36630 B-2021See footnote 4 page 27, see footnote 6 p. S73.
GC/MS625.1.
15. ChlordaneGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 O-3104-83, see footnote 8 3M0222.
GC/MS625.16410 B-2020.
16. ChloroprophamTLCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
GC/MS625.1.
17. 2,4-DGC6156640 B-2021See footnote 3 p. 115, see footnote 4 O-3105-83.
HPLC/MSSee footnote 12 O-2060-01.
18. 4,4′-DDDGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 O-3105-83, see footnote 8 3M0222.
GC/MS625.16410 B-2020.
19. 4,4′-DDEGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 , O-3104-83, see footnote 8 3M0222.
GC/MS625.16410 B-2020See footnote 11 O-1126-95.
20. 4,4′-DDTGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 O-3104-83, see footnote 8 3M0222.
GC/MS625.16410 B-2020.
21. Demeton-OGC614, 622See footnote 3 p. 25, see footnote 6 p. S51.
GC/MS625.1
22. Demeton-S.GC614, 622See footnote 3 p. 25, see footnote 6 p. S51.
GC/MS625.1.
23. DiazinonGC507, 614, 622, 1657See footnote 3 p. 25, see footnote 4 O-3104-83, see footnote 6 p. S51.
GC/MS525.2, 625.1See footnote 11 O-1126-95.
24. DicambaGC615See footnote 3 p. 115.
HPLC/MSSee footnote 12 O-2060-01.
25. DichlofenthionGC622.1See footnote 4 page 27, see footnote 6 p. S73.
26. DichloranGC608.2, 617, 608.36630 B-2021See footnote 3 p. 7.
27. DicofolGC617, 608.3See footnote 4 O-3104-83.
28. DieldrinGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 O-3104-83, see footnote 8 3M0222.
GC/MS625.16410 B-2020See footnote 11 O-1126-95.
29. DioxathionGC614.1, 1657See footnote 4 page 27, see footnote 6 p. S73.
30. DisulfotonGC507, 614, 622, 1657See footnote 3 p. 25, see footnote 6 p. S51.
GC/MS525.2, 625.1See footnote 11 O-1126-95.
31. DiuronTLCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
HPLC/MS553See footnote 12 O-2060-01.
32. Endosulfan IGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 O-3104-83, see footnote 8 3M0222.
GC/MS625.1 56410 B-2020See footnote 13 O-2002-01.
33. Endosulfan IIGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 8 3M0222.
GC/MS625.1 56410 B-2020See footnote 13 O-2002-01.
34. Endosulfan SulfateGC617, 608.36630 C-2021See footnote 8 3M0222.
GC/MS625.16410 B-2020.
35. EndrinGC505, 508, 617, 1656, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 O-3104-83, see footnote 8 3M0222.
GC/MS525.1, 525.2, 625.1 56410 B-2020.
36. Endrin aldehydeGC617, 608.36630 C-2021See footnote 8 3M0222.
GC/MS625.16410 B-2020.
37. EthionGC614, 614.1, 1657See footnote 4 page 27, see footnote 6 , p. S73.
GC/MS625.1See footnote 13 O-2002-01.
38. FenuronTLCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
HPLC/MSSee footnote 12 O-2060-01.
39. Fenuron-TCATLCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
40. HeptachlorGC505, 508, 617, 1656, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 O-3104-83, see footnote 8 3M0222.
GC/MS525.1, 525.2, 625.16410 B-2020.
41. Heptachlor epoxideGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 O-3104-83, see footnote 6 p. S73, see footnote 8 3M0222.
GC/MS625.16410 B-2020.
42. IsodrinGC617, 608.36630 B-2021 & C-2021See footnote 4 O-3104-83, see footnote 6 p. S73.
GC/MS625.1.
43. LinuronGCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
HPLC/MS553See footnote 12 O-2060-01.
GC/MSSee footnote 11 O-1126-95.
44. MalathionGC614, 16576630 B-2021See footnote 3 p. 25, see footnote 6 p. S51.
GC/MS625.1See footnote 11 O-1126-95.
45. MethiocarbTLCSee footnote 3 p. 94, see footnote 6 p. S60.
HPLC632.
HPLC/MSSee footnote 12 O-2060-01.
46. MethoxychlorGC505, 508, 608.2, 617, 1656, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 O-3104-83, see footnote 8 3M0222.
GC/MS525.1, 525.2, 625.1See footnote 11 O-1126-95.
47. MexacarbateTLCSee footnote 3 p. 94, see footnote 6 p. S60.
HPLC632.
GC/MS625.1.
48. MirexGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 4 O-3104-83.
GC/MS625.1.
49. MonuronTLCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
50. Monuron-TCATLCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
51. NeburonTLCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
HPLC/MSSee footnote 12 O-2060-01.
52. Parathion methylGC614, 622, 16576630 B-2021See footnote 4 page 27, see footnote 3 p. 25.
GC/MS625.1See footnote 11 O-1126-95.
53. Parathion ethylGC6146630 B-2021See footnote 4 page 27, see footnote 3 p. 25.
GC/MSSee footnote 11 O-1126-95.
54. PCNBGC608.1, 617, 608.36630 B-2021 & C-2021D3086-90 , D5812-96(02)See footnote 3 p. 7.
55. PerthaneGC617, 608.3D3086-90, D5812-96(02)See footnote 4 O-3104-83.
56. PrometonGC507, 619See footnote 3 p. 83, see footnote 6 p. S68, see footnote 9 O-3106-93.
GC/MS525.2, 625.1See footnote 11 O-1126-95.
57. PrometrynGC507, 619See footnote 3 p. 83, see footnote 6 p. S68, see footnote 9 O-3106-93.
GC/MS525.1, 525.2, 625.1See footnote 13 O-2002-01.
58. PropazineGC507, 619, 1656, 608.3See footnote 3 p. 83, see footnote 6 p. S68, see footnote 9 O-3106-93.
GC/MS525.1, 525.2, 625.1
59. ProphamTLCSee footnote 3 p. 10, see footnote 6 p. S64.
HPLC632.
HPLC/MSSee footnote 12 O-2060-01.
60. PropoxurTLCSee footnote 3 p. 94, see footnote 6 , p. S60.
HPLC632.
61. SecbumetonTLCSee footnote 3 p. 83, see footnote 6 p. S68.
GC619.
62. SiduronTLCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
HPLC/MSSee footnote 12 O-2060-01.
63. SimazineGC505, 507, 619, 1656, 608.3See footnote 3 p. 83, see footnote 6 p. S68, see footnote 9 O-3106-93.
GC/MS525.1, 525.2, 625.1See footnote 11 O-1126-95.
64. StrobaneGC617, 608.36630 B-2021 & C-2021See footnote 3 p. 7.
65. SwepTLCSee footnote 3 p. 104, see footnote 6 p. S64.
HPLC632.
66. 2,4,5-TGC6156640 B-2021See footnote 3 p. 115, see footnote 4 O-3105-83.
67. 2,4,5-TP (Silvex)GC6156640 B-2021See footnote 3 p. 115, see footnote 4 O-3105-83.
68. TerbuthylazineGC619, 1656, 608.3See footnote 3 p. 83, see footnote 6 p. S68.
GC/MSSee footnote 13 O-2002-01.
69. ToxapheneGC505, 508, 617, 1656, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)See footnote 3 p. 7, see footnote 8 , see footnote 4 O-3105-83.
GC/MS525.1, 525.2, 625.16410 B-2020.
70. TrifluralinGC508, 617, 627, 1656, 608.36630 B-2021See footnote 3 p. 7, see footnote 9 O-3106-93.
GC/MS525.2, 625.1See footnote 11 O-1126-95.

Table ID notes:
1 Pesticides are listed in this table by common name for the convenience of the reader. Additional pesticides may be found under table IC of this section, where entries are listed by chemical name.
2 The standardized test procedure to be used to determine the method detection limit (MDL) for these test procedures is given at appendix B to this part, Definition and Procedure for the Determination of the Method Detection Limit.
3 Methods for Benzidine, Chlorinated Organic Compounds, Pentachlorophenol and Pesticides in Water and Wastewater. September 1978. U.S. EPA. This EPA publication includes thin-layer chromatography (TLC) methods.
4 Methods for the Determination of Organic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A3. 1987. USGS.
5 The method may be extended to include α-BHC, γ-BHC, endosulfan I, endosulfan II, and endrin. However, when they are known to exist, Method 608 is the preferred method.
6 Selected Analytical Methods Approved and Cited by the United States Environmental Protection Agency, Supplement to the 15th Edition of Standard Methods for the Examination of Water and Wastewater. 1981. American Public Health Association (APHA).
7 Each analyst must make an initial, one-time, demonstration of their ability to generate acceptable precision and accuracy with Methods 608.3 and 625.1 in accordance with procedures given in Section 8.2 of each of these methods. Additionally, each laboratory, on an on-going basis, must spike and analyze 10% of all samples analyzed with Method 608.3 or 5% of all samples analyzed with Method 625.1 to monitor and evaluate laboratory data quality in accordance with Sections 8.3 and 8.4 of these methods. When the recovery of any parameter falls outside the warning limits, the analytical results for that parameter in the unspiked sample are suspect. The results should be reported, but cannot be used to demonstrate regulatory compliance. These quality control requirements also apply to the Standard Methods, ASTM Methods, and other methods cited.
8 Organochlorine Pesticides and PCBs in Wastewater Using Empore TM Disk. Revised October 28, 1994. 3M Corporation.
9 Method O-3106-93 is in Open File Report 94-37, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Triazine and Other Nitrogen-Containing Compounds by Gas Chromatography with Nitrogen Phosphorus Detectors. 1994. USGS.
10 EPA Methods 608.1, 608.2, 614, 614.1, 615, 617, 619, 622, 622.1, 627, and 632 are found in Methods for the Determination of Nonconventional Pesticides in Municipal and Industrial Wastewater, EPA 821-R-92-002, April 1992, U.S. EPA. EPA Methods 505, 507, 508, 525.1, 531.1 and 553 are in Methods for the Determination of Nonconventional Pesticides in Municipal and Industrial Wastewater, Volume II, EPA 821-R-93-010B, 1993, U.S. EPA. EPA Method 525.2 is in Determination of Organic Compounds in Drinking Water by Liquid-Solid Extraction and Capillary Column Gas Chromatography/Mass Spectrometry, Revision 2.0, 1995, U.S. EPA. EPA methods 1656 and 1657 are in Methods for The Determination of Nonconventional Pesticides In Municipal and Industrial Wastewater, Volume I, EPA 821-R-93-010A, 1993, U.S. EPA. Methods 608.3 and 625.1 are available at: cwa-methods/approved-cwa-test-methods-organic-compounds.
11 Method O-1126-95 is in Open-File Report 95-181, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of pesticides in water by C-18 solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion monitoring. 1995. USGS.
12 Method O-2060-01 is in Water-Resources Investigations Report 01-4134, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Pesticides in Water by Graphitized Carbon-Based Solid-Phase Extraction and High-Performance Liquid Chromatography/Mass Spectrometry. 2001. USGS.
13 Method O-2002-01 is in Water-Resources Investigations Report 01-4098, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of moderate-use pesticides in water by C-18 solid-phase extraction and capillary-column gas chromatography/mass spectrometry. 2001. USGS.
14 Method O-1121-91 is in Open-File Report 91-519, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of organonitrogen herbicides in water by solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion monitoring. 1992. USGS.
15 Please refer to the following applicable Quality Control Section: Part 6000 Methods, Individual Organic Compounds 6020 (2019). These Quality Control Standards are available for download at www.standardmethods.org at no charge.

* * * * *

Table IH—List of Approved Microbiological Methods for Ambient Water
Parameter and unitsMethod 1EPAStandard methodsAOAC, ASTM, USGSOther
Bacteria
1. Coliform (fecal), number per 100 mLMost Probable Number (MPN), 5 tube, 3 dilution, orp. 132 39221 E-2014, 9221 F-2014. 32
Membrane filter (MF) 2 , single stepp. 124 39222 D-2015 26B-0050-85. 4
2. Coliform (total), number per 100 mLMPN, 5 tube, 3 dilution, orp. 114 39221 B-2014.
MF 2 , single step orp. 108 39222 B-2015 27B-0025-85. 4
MF 2 , two step with enrichmentp. 111 39222 B-2015. 27
3. E. coli, number per 100 mLMPN 5713 , multiple tube, or9221 B.3-2014/9221 F-2014. 101232
Multiple tube/multiple well, or9223 B-2016 11991.15 9Colilert® 1115 , Colilert-18®. 111415
MF 2567 , two step, or1103.2 189222 B-2015/9222 I-2015 17 , 9213 D-2007D5392-93. 8
Single step1603.1 19 , 1604 20m-ColiBlue24® 16 , KwikCount EC. 2829
4. Fecal streptococci, number per 100 mLMPN, 5 tube, 3 dilution, orp. 139 39230 B-2013.
MF 2 , orp. 136 39230 C-2013 30B-0055-85. 4
Plate countp. 143. 3
5. Enterococci, number per 100 mLMPN 57 , multiple tube/multiple well, or9230 D-2013D6503-99 8Enterolert®. 1121
MF 2567 two step, or1106.2 229230 C-2013 30D5259-92. 8
Single step, or1600.1 239230 C-2013. 30
Plate countp. 143. 3
Protozoa
6. CryptosporidiumFiltration/IMS/FA1622 24 , 1623 25 , 1623.1. 2531
7. GiardiaFiltration/IMS/FA1623 25 , 1623.1. 2531
Table 1H notes:

1 The method must be specified when results are reported.
2 A 0.45-µm membrane filter (MF) or other pore size certified by the manufacturer to fully retain organisms to be cultivated and to be free of extractables which could interfere with their growth.
3 Microbiological Methods for Monitoring the Environment, Water and Wastes. EPA/600/8-78/017. 1978. US EPA.
4 U.S. Geological Survey Techniques of Water-Resource Investigations, Book 5, Laboratory Analysis, Chapter A4, Methods for Collection and Analysis of Aquatic Biological and Microbiological Samples. 1989. USGS.
5 Tests must be conducted to provide organism enumeration (density). Select the appropriate configuration of tubes/filtrations and dilutions/volumes to account for the quality, character, consistency, and anticipated organism density of the water sample.
6 When the MF method has not been used previously to test waters with high turbidity, large numbers of noncoliform bacteria, or samples that may contain organisms stressed by chlorine, a parallel test should be conducted with a multiple-tube technique to demonstrate applicability and comparability of results.
7 To assess the comparability of results obtained with individual methods, it is suggested that side-by-side tests be conducted across seasons of the year with the water samples routinely tested in accordance with the most current Standard Methods for the Examination of Water and Wastewater or EPA alternate test procedure (ATP) guidelines.
8 Annual Book of ASTM Standards—Water and Environmental Technology. Section 11.02. 2000, 1999, 1996. ASTM International.
9 Official Methods of Analysis of AOAC International, 16th Edition, Volume I, Chapter 17. 1995. AOAC International.
10 The multiple-tube fermentation test is used in 9221B.3-2014. Lactose broth may be used in lieu of lauryl tryptose broth (LTB), if at least 25 parallel tests are conducted between this broth and LTB using the water samples normally tested, and this comparison demonstrates that the false-positive rate and false-negative rate for total coliform using lactose broth is less than 10 percent. No requirement exists to run the completed phase on 10 percent of all total coliform-positive tubes on a seasonal basis.
11 These tests are collectively known as defined enzyme substrate tests.
12 After prior enrichment in a presumptive medium for total coliform using 9221B.3-2014, all presumptive tubes or bottles showing any amount of gas, growth or acidity within 48 h ± 3 h of incubation shall be submitted to 9221F-2014. Commercially available EC-MUG media or EC media supplemented in the laboratory with 50 µg/mL of MUG may be used.
13 Samples shall be enumerated by the multiple-tube or multiple-well procedure. Using multiple-tube procedures, employ an appropriate tube and dilution configuration of the sample as needed and report the Most Probable Number (MPN). Samples tested with Colilert® may be enumerated with the multiple-well procedures, Quanti-Tray® or Quanti-Tray®/2000, and the MPN calculated from the table provided by the manufacturer.
14 Colilert-18® is an optimized formulation of the Colilert® for the determination of total coliforms and E. coli that provides results within 18 h of incubation at 35 °C, rather than the 24 h required for the Colilert® test and is recommended for marine water samples.
15 Descriptions of the Colilert®, Colilert-18®, Quanti-Tray ®, and Quanti-Tray®/2000 may be obtained from IDEXX Laboratories Inc.
16 A description of the mColiBlue24® test may be obtained from Hach Company.
17 Subject coliform positive samples determined by 9222B-2015 or other membrane filter procedure to 9222I-2015 using NA-MUG media.
18 Method 1103.2: Escherichia coli ( E. coli) in Water by Membrane Filtration Using membrane-Thermotolerant Escherichia coli Agar (mTEC), EPA-821-R-23-009. September 2023. US EPA.
19 Method 1603.1: Escherichia coli ( E. coli) in Water by Membrane Filtration Using Modified membrane-Thermotolerant Escherichia coli Agar (Modified mTEC), EPA-821-R-23-008. September 2023 . US EPA.
20 Method 1604: Total Coliforms and Escherichia coli ( E. coli) in Water by Membrane Filtration by Using a Simultaneous Detection Technique (MI Medium), EPA 821-R-02-024. September 2002. US EPA.
21 A description of the Enterolert® test may be obtained from IDEXX Laboratories Inc.
22 Method 1106.2: Enterococci in Water by Membrane Filtration Using membrane- Enterococcus -Esculin Iron Agar (mE-EIA), EPA-821-R-23-007. September 2023. US EPA.
23 Method 1600.1: Enterococci in Water by Membrane Filtration Using membrane- Enterococcus Indoxyl-β-D-Glucoside Agar (mEI), EPA-821-R-21-006. September 2023. US EPA.
24 Method 1622 uses a filtration, concentration, immunomagnetic separation of oocysts from captured material, immunofluorescence assay to determine concentrations, and confirmation through vital dye staining and differential interference contrast microscopy for the detection of Cryptosporidium. Method 1622: Cryptosporidium in Water by Filtration/IMS/FA, EPA-821-R-05-001. December 2005. US EPA.
25 Methods 1623 and 1623.1 use a filtration, concentration, immunomagnetic separation of oocysts and cysts from captured material, immunofluorescence assay to determine concentrations, and confirmation through vital dye staining and differential interference contrast microscopy for the simultaneous detection of Cryptosporidium and Giardia oocysts and cysts. Method 1623: Cryptosporidium and Giardia in Water by Filtration/IMS/FA. EPA-821-R-05-002. December 2005. US EPA. Method 1623.1: Cryptosporidium and Giardia in Water by Filtration/IMS/FA. EPA 816-R-12-001. January 2012. US EPA.
26 On a monthly basis, at least ten blue colonies from positive samples must be verified using Lauryl Tryptose Broth and EC broth, followed by count adjustment based on these results; and representative non-blue colonies should be verified using Lauryl Tryptose Broth. Where possible, verifications should be done from randomized sample sources.
27 On a monthly basis, at least ten sheen colonies from positive samples must be verified using Lauryl Tryptose Broth and brilliant green lactose bile broth, followed by count adjustment based on these results; and representative non-sheen colonies should be verified using Lauryl Tryptose Broth. Where possible, verifications should be done from randomized sample sources.
28 A description of KwikCount EC may be obtained from Roth Bioscience, LLC.
29 Approved for the analyses of E. coli in freshwater only.
30 Verification of colonies by incubation of BHI agar at 10 ± 0.5 °C for 48 ± 3 h is optional. As per the Errata to the 23rd Edition of Standard Methods for the Examination of Water and Wastewater “Growth on a BHI agar plate incubated at 10 ± 0.5 °C for 48 ± 3 h is further verification that the colony belongs to the genus Enterococcus.”
31 Method 1623.1 includes updated acceptance criteria for IPR, OPR, and MS/MSD and clarifications and revisions based on the use of Method 1623 for years and technical support questions.
32 9221 F.2-2014 allows for simultaneous detection of E. coli and thermotolerant fecal coliforms by adding inverted vials to EC-MUG; the inverted vials collect gas produced by thermotolerant fecal coliforms.

* * * *

(b) The material listed in this paragraph (b) is incorporated by reference into this section with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. All approved incorporation by reference (IBR) material is available for inspection at the EPA and at the National Archives and Records Administration (NARA). Contact the EPA at: EPA's Water Docket, EPA West, 1301 Constitution Avenue NW, Room 3334, Washington, DC 20004; telephone: 202-566-2426; email: docket-customerservice@epa.gov. For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email fr.inspection@nara.gov. The material may be obtained from the following sources in this paragraph (b).

(1) Environmental Monitoring and Support Laboratory, U.S. Environmental Protection Agency, Cincinnati OH (US EPA). Available at http://water.epa.gov/scitech/methods/cwa/index.cfm or from: National Technical Information Service, 5285 Port Royal Road, Springfield, Virginia 22161

(i) Microbiological Methods for Monitoring the Environment, Water, and Wastes. 1978. EPA/600/8-78/017, Pub. No. PB-290329/A.S.

(A) Part III Analytical Methodology, Section B Total Coliform Methods, page 108. Table IA, Note 3; Table IH, Note 3.

(B) Part III Analytical Methodology, Section B Total Coliform Methods, 2.6.2 Two-Step Enrichment Procedure, page 111. Table IA, Note 3; Table IH, Note 3.

(C) Part III Analytical Methodology, Section B Total Coliform Methods, 4 Most Probable Number (MPN) Method, page 114. Table IA, Note 3; Table IH, Note 3.

(D) Part III Analytical Methodology, Section C Fecal Coliform Methods, 2 Direct Membrane Filter (MF) Method, page 124. Table IA, Note 3; Table IH, Note 3.

(E) Part III, Analytical Methodology, Section C Fecal Coliform Methods, 5 Most Probable Number (MPN) Method, page 132. Table IA, Note 3; Table IH, Note 3.

(F) Part III Analytical Methodology, Section D Fecal Streptococci, 2 Membrane Filter (MF) Method, page 136. Table IA, Note 3; Table IH, Note 3.

(G) Part III Analytical Methodology, Section D Fecal Streptococci, 4 Most Probable Number Method, page 139. Table IA, Note 3; Table IH, Note 3.

(H) Part III Analytical Methodology, Section D Fecal Streptococci, 5 Pour Plate Method, page 143. Table IA, Note 3; Table IH, Note 3.

(ii) [Reserved]

(2) Environmental Monitoring and Support Laboratory, U.S. Environmental Protection Agency, Cincinnati OH (US EPA). Available at http://water.epa.gov/scitech/methods/cwa/index.cfm.

(3) National Exposure Risk Laboratory-Cincinnati, U.S. Environmental Protection Agency, Cincinnati OH (US EPA). Available from http://water.epa.gov/scitech/methods/cwa/index.cfm or from the National Technical Information Service (NTIS), 5285 Port Royal Road, Springfield, VA 22161. Telephone: 800-553-6847.

(i) Methods for the Determination of Inorganic Substances in Environmental Samples. August 1993. EPA/600/R-93/100, Pub. No. PB 94120821. Table IB, Note 52.

(A) Method 180.1, Determination of Turbidity by Nephelometry. Revision 2.0. Table IB, Note 52.

(B) Method 300.0, Determination of Inorganic Anions by Ion Chromatography. Revision 2.1. Table IB, Note 52.

(C) Method 335.4, Determination of Total Cyanide by Semi-Automated Colorimetry. Revision 1.0. Table IB, Notes 52 and 57.

(D) Method 350.1, Determination of Ammonium Nitrogen by Semi-Automated Colorimetry. Revision 2.0. Table IB, Notes 30 and 52.

(E) Method 351.2, Determination of Total Kjeldahl Nitrogen by Semi-Automated Colorimetry. Revision 2.0. Table IB, Note 52.

(F) Method 353.2, Determination of Nitrate-Nitrite Automated Colorimetry. Revision 2.0. Table IB, Note 52.

(G) Method 365.1, Determination of Phosphorus by Automated Colorimetry. Revision 2.0. Table IB, Note 52.

(H) Method 375.2, Determination of Sulfate by Automated Colorimetry. Revision 2.0. Table IB, Note 52.

(I) Method 410.4, Determination of Chemical Oxygen Demand by Semi-Automated Colorimetry. Revision 2.0. Table IB, Note 52.

(ii) Methods for the Determination of Metals in Environmental Samples, Supplement I. May 1994. EPA/600/R-94/111, Pub. No. PB 95125472. Table IB, Note 52.

(A) Method 200.7, Determination of Metals and Trace Elements in Water and Wastes by Inductively Coupled Plasma-Atomic Emission Spectrometry. Revision 4.4. Table IB, Note 52.

(B) Method 200.8, Determination of Trace Elements in Water and Wastes by Inductively Coupled Plasma Mass Spectrometry. Revision 5.3. Table IB, Note 52.

(C) Method 200.9, Determination of Trace Elements by Stabilized Temperature Graphite Furnace Atomic Absorption Spectrometry. Revision 2.2. Table IB, Note 52.

(D) Method 218.6, Determination of Dissolved Hexavalent Chromium in Drinking Water, Groundwater, and Industrial Wastewater Effluents by Ion Chromatography. Revision 3.3. Table IB, Note 52.

(E) Method 245.1, Determination of Mercury in Water by Cold Vapor Atomic Absorption Spectrometry. Revision 3.0. Table IB, Note 52.

(4) National Exposure Risk Laboratory-Cincinnati, U.S. Environmental Protection Agency, Cincinnati OH (US EPA). Available at http://water.epa.gov/scitech/methods/cwa/index.cfm.

(i) EPA Method 200.5, Determination of Trace Elements in Drinking Water by Axially Viewed Inductively Coupled Plasma-Atomic Emission Spectrometry. Revision 4.2, October 2003. EPA/600/R-06/115. Table IB, Note 68.

(ii) EPA Method 525.2, Determination of Organic Compounds in Drinking Water by Liquid-Solid Extraction and Capillary Column Gas Chromatography/Mass Spectrometry. Revision 2.0, 1995. Table ID, Note 10.

(5) Office of Research and Development, Cincinnati OH. U.S. Environmental Protection Agency, Cincinnati OH (US EPA). Available at http://water.epa.gov/scitech/methods/cwa/index.cfm or from ORD Publications, CERI, U.S. Environmental Protection Agency, Cincinnati OH 45268.

(i) Methods for Benzidine, Chlorinated Organic Compounds, Pentachlorophenol, and Pesticides in Water and Wastewater. 1978. Table IC, Note 3; Table ID, Note 3.

(ii) Methods for Chemical Analysis of Water and Wastes. March 1979. EPA-600/4-79-020. Table IB, Note 1.

(iii) Methods for Chemical Analysis of Water and Wastes. Revised March 1983. EPA-600/4-79-020. Table IB, Note 1.

(A) Method 120.1, Conductance, Specific Conductance, μmhos at 25°C. Revision 1982. Table IB, Note 1.

(B) Method 130.1, Hardness, Total (mg/L as CaCO3), Colorimetric, Automated EDTA. Issued 1971. Table IB, Note 1.

(C) Method 150.2, pH, Continuous Monitoring (Electrometric). December 1982. Table IB, Note 1.

(D) Method 160.4, Residue, Volatile, Gravimetric, Ignition at 550°C. Issued 1971. Table IB, Note 1.

(E) Method 206.5, Arsenic, Sample Digestion Prior to Total Arsenic Analysis by Silver Diethyldithiocarbamate or Hydride Procedures. Issued 1978. Table IB, Note 1.

(F) Method 231.2, Gold, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(G) Method 245.2, Mercury, Automated Cold Vapor Technique. Issued 1974. Table IB, Note 1.

(H) Method 252.2, Osmium, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(I) Method 253.2, Palladium, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(J) Method 255.2, Platinum, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(K) Method 265.2, Rhodium, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(L) Method 279.2, Thallium, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(M) Method 283.2, Titanium, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(N) Method 289.2, Zinc, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(O) Method 310.2, Alkalinity, Colorimetric, Automated, Methyl Orange. Revision 1974. Table IB, Note 1.

(P) Method 351.1, Nitrogen, Kjeldahl, Total, Colorimetric, Automated Phenate. Revision 1978. Table IB, Note 1.

(Q) Method 352.1, Nitrogen, Nitrate, Colorimetric, Brucine. Issued 1971. Table IB, Note 1.

(R) Method 365.3, Phosphorus, All Forms, Colorimetric, Ascorbic Acid, Two Reagent. Issued 1978. Table IB, Note 1.

(S) Method 365.4, Phosphorus, Total, Colorimetric, Automated, Block Digestor AA II. Issued 1974. Table IB, Note 1.

(T) Method 410.3, Chemical Oxygen Demand, Titrimetric, High Level for Saline Waters. Revision 1978. Table IB, Note 1.

(U) Method 420.1, Phenolics, Total Recoverable, Spectrophotometric, Manual 4-AAP With Distillation. Revision 1978. Table IB, Note 1.

(iv) Prescribed Procedures for Measurement of Radioactivity in Drinking Water. 1980. EPA-600/4-80-032. Table IE.

(A) Method 900.0, Gross Alpha and Gross Beta Radioactivity. Table IE.

(B) Method 903.0, Alpha-Emitting iRadio Isotopes. Table IE.

(C) Method 903.1, Radium-226, Radon Emanation Technique. Table IE.

(D) Appendix B, Error and Statistical Calculations. Table IE.

(6) Office of Science and Technology, U.S. Environmental Protection Agency, Washington DC (US EPA). Available at http://water.epa.gov/scitech/methods/cwa/index.cfm.

(i) Method 1625C, Semivolatile Organic Compounds by Isotope Dilution GCMS. 1989. Table IF.

(ii) [Reserved]

(7) Office of Water, U.S. Environmental Protection Agency, Washington DC (US EPA). Available at http://water.epa.gov/scitech/methods/cwa/index.cfm or from National Technical Information Service, 5285 Port Royal Road, Springfield, Virginia 22161.

(i) Method 1631, Mercury in Water by Oxidation, Purge and Trap, and Cold Vapor Atomic Fluorescence Spectrometry. Revision E, August 2002. EPA-821-R-02-019, Pub. No. PB2002-108220. Table IB, Note 43.

(ii) Kelada-01, Kelada Automated Test Methods for Total Cyanide, Acid Dissociable Cyanide, and Thiocyanate. Revision 1.2, August 2001. EPA 821-B-01-009, Pub. No. PB 2001-108275. Table IB, Note 55.

(iii) In the compendium Analytical Methods for the Determination of Pollutants in Pharmaceutical Manufacturing Industry Wastewaters. July 1998. EPA 821-B-98-016, Pub. No. PB95201679. Table IF, Note 1.

(A) EPA Method 1666, Volatile Organic Compounds Specific to the Pharmaceutical Industry by Isotope Dilution GC/MS. Table IF, Note 1.

(B) EPA Method 1667, Formaldehyde, Isobutyraldehyde, and Furfural by Derivatization Followed by High Performance Liquid Chromatography. Table IF.

(C) Method 1671, Volatile Organic Compounds Specific to the Pharmaceutical Manufacturing Industry by GC/FID. Table IF.

(iv) Methods For The Determination of Nonconventional Pesticides In Municipal and Industrial Wastewater, Volume I. Revision I, August 1993. EPA 821-R-93-010A, Pub. No. PB 94121654. Tables ID, IG.

(A) Method 608.1, Organochlorine Pesticides. Table ID, Note 10; Table IG, Note 3.

(B) Method 608.2, Certain Organochlorine Pesticides. Table ID, Note 10; Table IG, Note 3.

(C) Method 614, Organophosphorus Pesticides. Table ID, Note 10; Table IG, Note 3.

(D) Method 614.1, Organophosphorus Pesticides. Table ID, Note 10; Table IG, Note 3.

(E) Method 615, Chlorinated Herbicides. Table ID, Note 10; Table IG, Note 3.

(F) Method 617, Organohalide Pesticides and PCBs. Table ID, Note 10; Table IG, Note 3.

(G) Method 619, Triazine Pesticides. Table ID, Note 10; Table IG, Note 3.

(H) Method 622, Organophosphorus Pesticides. Table ID, Note 10; Table IG, Note 3.

(I) Method 622.1, Thiophosphate Pesticides. Table ID, Note 10; Table IG, Note 3.

(J) Method 627, Dinitroaniline Pesticides. Table ID, Note 10; Table IG, Notes 1 and 3.

(K) Method 629, Cyanazine. Table IG, Note 3.

(L) Method 630, Dithiocarbamate Pesticides. Table IG, Note 3.

(M) Method 630.1, Dithiocarbamate Pesticides. Table IG, Note 3.

(N) Method 631, Benomyl and Carbendazim. Table IG, Note 3.

(O) Method 632, Carbamate and Urea Pesticides. Table ID, Note 10; Table IG, Note 3.

(P) Method 632.1, Carbamate and Amide Pesticides. Table IG, Note 3.

(Q) Method 633, Organonitrogen Pesticides. Table IG, Note 3.

(R) Method 633.1, Neutral Nitrogen-Containing Pesticides. Table IG, Note 3.

(S) Method 637, MBTS and TCMTB. Table IG, Note 3.

(T) Method 644, Picloram. Table IG, Note 3.

(U) Method 645, Certain Amine Pesticides and Lethane. Table IG, Note 3.

(V) Method 1656, Organohalide Pesticides. Table ID, Note 10; Table IG, Notes 1 and 3.

(W) Method 1657, Organophosphorus Pesticides. Table ID, Note 10; Table IG, Note 3.

(X) Method 1658, Phenoxy-Acid Herbicides. Table IG, Note 3.

(Y) Method 1659, Dazomet. Table IG, Note 3.

(Z) Method 1660, Pyrethrins and Pyrethroids. Table IG, Note 3.

(AA) Method 1661, Bromoxynil. Table IG, Note 3.

(BB) Ind-01. Methods EV-024 and EV-025, Analytical Procedures for Determining Total Tin and Triorganotin in Wastewater. Table IG, Note 3.

(v) Methods For The Determination of Nonconventional Pesticides In Municipal and Industrial Wastewater, Volume II. August 1993. EPA 821-R-93-010B, Pub. No. PB 94166311. Table IG.

(A) Method 200.9, Determination of Trace Elements by Stabilized Temperature Graphite Furnace Atomic Absorption Spectrometry. Table IG, Note 3.

(B) Method 505, Analysis of Organohalide Pesticides and Commercial Polychlorinated Biphenyl (PCB) Products in Water by Microextraction and Gas Chromatography. Table ID, Note 10; Table IG, Note 3.

(C) Method 507, The Determination of Nitrogen- and Phosphorus-Containing Pesticides in Water by Gas Chromatography with a Nitrogen-Phosphorus Detector. Table ID, Note 10; Table IG, Note 3.

(D) Method 508, Determination of Chlorinated Pesticides in Water by Gas Chromatography with an Electron Capture Detector. Table ID, Note 10; Table IG, Note 3.

(E) Method 515.1, Determination of Chlorinated Acids in Water by Gas Chromatography with an Electron Capture Detector. Table IG, Notes 2 and 3.

(F) Method 515.2, Determination of Chlorinated Acids in Water Using Liquid-Solid Extraction and Gas Chromatography with an Electron Capture Detector. Table IG, Notes 2 and 3.

(G) Method 525.1, Determination of Organic Compounds in Drinking Water by Liquids-Solid Extraction and Capillary Column Gas Chromatography/Mass Spectrometry. Table ID, Note 10; Table IG, Note 3.

(H) Method 531.1, Measurement of N-Methylcarbamoyloximes and N-Methylcarbamates in Water by Direct Aqueous Injection HPLC with Post-Column Derivatization. Table ID, Note 10; Table IG, Note 3.

(I) Method 547, Determination of Glyphosate in Drinking Water by Direct-Aqueous-Injection HPLC, Post-Column Derivatization, and Fluorescence Detection. Table IG, Note 3.

(J) Method 548, Determination of Endothall in Drinking Water by Aqueous Derivatization, Liquid-Solid Extraction, and Gas Chromatography with Electron-Capture Detector. Table IG, Note 3.

(K) Method 548.1, Determination of Endothall in Drinking Water by Ion-Exchange Extraction, Acidic Methanol Methylation and Gas Chromatography/Mass Spectrometry. Table IG, Note 3.

(L) Method 553, Determination of Benzidines and Nitrogen-Containing Pesticides in Water by Liquid-Liquid Extraction or Liquid-Solid Extraction and Reverse Phase High Performance Liquid Chromatography/Particle Beam/Mass Spectrometry Table ID, Note 10; Table IG, Note 3.

(M) Method 555, Determination of Chlorinated Acids in Water by High Performance Liquid Chromatography With a Photodiode Array Ultraviolet Detector. Table IG, Note 3.

(vi) In the compendium Methods for the Determination of Organic Compounds in Drinking Water. Revised July 1991, December 1998. EPA-600/4-88-039, Pub. No. PB92-207703. Table IF.

(A) EPA Method 502.2, Volatile Organic Compounds in Water by Purge and Trap Capillary Column Gas Chromatography with Photoionization and Electrolytic Conductivity Detectors in Series. Table IF.

(B) [Reserved]

(vii) In the compendium Methods for the Determination of Organic Compounds in Drinking Water-Supplement II. August 1992. EPA-600/R-92-129, Pub. No. PB92-207703. Table IF.

(A) EPA Method 524.2, Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry. Table IF.

(B) [Reserved]

(viii) Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. October 2002. EPA 821-R-02-012, Pub. No. PB2002-108488. Table IA, Note 26.

(ix) Short-Term Methods for Measuring the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms, Fourth Edition. October 2002. EPA 821-R-02-013, Pub. No. PB2002-108489. Table IA, Note 27.

(x) Short-Term Methods for Measuring the Chronic Toxicity of Effluents and Receiving Waters to Marine and Estuarine Organisms, Third Edition. October 2002. EPA 821-R-02-014, Pub. No. PB2002-108490. Table IA, Note 28.

(8) Office of Water, U.S. Environmental Protection Agency (U.S. EPA), mail code 4303T, 1301 Constitution Avenue NW, Washington, DC 20460; website: www.epa.gov/cwa-methods.

(i) Method 245.7, Mercury in Water by Cold Vapor Atomic Fluorescence Spectrometry. Revision 2.0, February 2005. EPA-821-R-05-001. Table IB, Note 17.

(ii) Method 1103.2: Escherichia coli (E. coli) in Water by Membrane Filtration Using membrane-Thermotolerant Escherichia coli Agar (mTEC), EPA-821-R-23-009. September 2023. Table IH, Note 18.

(iii) Method 1106.2: Enterococci in Water by Membrane Filtration Using membrane- Enterococcus -Esculin Iron Agar (mE-EIA), EPA-821-R-23-007. September 2023. Table IH, Note 22.

(iv) Method 1600.1: Enterococci in Water by Membrane Filtration Using membrane- Enterococcus Indoxyl-β-D-Glucoside Agar (mEI), EPA-821-R-23-006, September 2023. Table 1A, Note 24; Table IH, Note 23.

(v) Method 1603.1: Escherichia coli (E. coli) in Water by Membrane Filtration Using Modified membrane-Thermotolerant Escherichia coli Agar (Modified mTEC), EPA-821-R-23-008, September 2023. Table IA, Note 21; Table IH, Note 19.

(vi) Method 1604: Total Coliforms and Escherichia coli ( E. coli) in Water by Membrane Filtration Using a Simultaneous Detection Technique (MI Medium). September 2002. EPA-821-R-02-024. Table IH, Note 21.

(vii) Whole Effluent Toxicity Methods Errata Sheet, EPA 821-R-02-012-ES. December 2016, Table IA, Notes 25, 26, and 27.

(viii) Method 1623: Cryptosporidium and Giardia in Water by Filtration/IMS/FA. December 2005. EPA-821-R-05-002. Table IH, Note 26.

(ix) Method 1623.1: Cryptosporidium and Giardia in Water by Filtration/IMS/FA. EPA 816-R-12-001. January 2012. U.S. EPA, Table IH, Notes 25 and 31.

(x) Method 1627, Kinetic Test Method for the Prediction of Mine Drainage Quality. December 2011. EPA-821-R-09-002. Table IB, Note 69.

(xi) Method 1664, n -Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated n -Hexane Extractable Material (SGT-HEM; Nonpolar Material) by Extraction and Gravimetry. Revision A, February 1999. EPA-821-R-98-002. Table IB, Notes 38 and 42.

(xii) Method 1664, n -Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated n -Hexane Extractable Material (SGT-HEM; Nonpolar Material) by Extraction and Gravimetry, Revision B, February 2010. EPA-821-R-10-001. Table IB, Notes 38 and 42.

(xiii) Method 1669, Sampling Ambient Water for Trace Metals at EPA Water Quality Criteria Levels. July 1996. Table IB, Note 43.

(xiv) Method 1680: Fecal Coliforms in Sewage Sludge (Biosolids) by Multiple-Tube Fermentation using Lauryl Tryptose Broth (LTB) and EC Medium. September 2014. EPA-821-R-14-009.Table IA, Note 15.

(xv) Method 1681: Fecal Coliforms in Sewage Sludge (Biosolids) by Multiple-Tube Fermentation using A-1 Medium. July 2006. EPA 821-R-06-013. Table IA, Note 20.

(xvi) Method 1682: Salmonella in Sewage Sludge (Biosolids) by Modified Semisolid Rappaport-Vassiliadis (MSRV) Medium. September 2014. EPA 821-R-14-012. Table IA, Note 23.

(9) American National Standards Institute, 1430 Broadway, New York NY 10018.

(i) ANSI. American National Standard on Photographic Processing Effluents. April 2, 1975. Table IB, Note 9.

(ii) [Reserved]

(10) American Public Health Association, 800 I Street, NW, Washington, DC 20001; phone: (202)777-2742, website: www.standardmethods.org.

(i) Standard Methods for the Examination of Water and Wastewater. 14th Edition, 1975. Table IB, Notes 27 and 86.

(ii) Standard Methods for the Examination of Water and Wastewater. 15th Edition, 1980, Table IB, Note 30; Table ID.

(iii) Selected Analytical Methods Approved and Cited by the United States Environmental Protection Agency, Supplement to the 15th Edition of Standard Methods for the Examination of Water and Wastewater. 1981. Table IC, Note 6; Table ID, Note 6.

(iv) Standard Methods for the Examination of Water and Wastewater. 18th Edition, 1992. Tables IA, IB, IC, ID, IE, and IH.

(v) Standard Methods for the Examination of Water and Wastewater. 19th Edition, 1995. Tables IA, IB, IC, ID, IE, and IH.

(vi) Standard Methods for the Examination of Water and Wastewater. 20th Edition, 1998. Tables IA, IB, IC, ID, IE, and IH.

(vii) Standard Methods for the Examination of Water and Wastewater. 21st Edition, 2005. Table IB, Notes 17 and 27.

(viii) 2120, Color. Revised September 4, 2021. Table IB.

(ix) 2130, Turbidity. Revised 2020. Table IB.

(x) 2310, Acidity. Revised 2020. Table IB.

(xi) 2320, Alkalinity. Revised 2021. Table IB.

(xii) 2340, Hardness. Revised 2021. Table IB.

(xiii) 2510, Conductivity. Revised 2021. Table IB.

(xiv) 2540, Solids. Revised 2020. Table IB.

(xv) 2550, Temperature. 2010. Table IB.

(xvi) 3111, Metals by Flame Atomic Absorption Spectrometry. Revised 2019. Table IB.

(xvii) 3112, Metals by Cold-Vapor Atomic Absorption Spectrometry. Revised 2020. Table IB.

(xviii) 3113, Metals by Electrothermal Atomic Absorption Spectrometry. Revised 2020. Table IB.

(xix) 3114, Arsenic and Selenium by Hydride Generation/Atomic Absorption Spectrometry. Revised 2020, Table IB.

(xx) 3120, Metals by Plasma Emission Spectroscopy. Revised 2020. Table IB.

(xxi) 3125, Metals by Inductively Coupled Plasma-Mass Spectrometry. Revised 2020. Table IB.

(xxii) 3500-Al, Aluminum. Revised 2020. Table IB.

(xxiii) 3500-As, Arsenic. Revised 2020. Table IB.

(xxiv) 3500-Ca, Calcium. Revised 2020. Table IB.

(xxv) 3500-Cr, Chromium. Revised 2020. Table IB.

(xxvi) 3500-Cu, Copper. Revised 2020. Table IB.

(xxvii) 3500-Fe, Iron. 2011. Table IB.

(xxviii) 3500-Pb, Lead. Revised 2020. Table IB.

(xxix) 3500-Mn, Manganese. Revised 2020. Table IB.

(xxx) 3500-K, Potassium. Revised 2020. Table IB.

(xxxi) 3500-Na, Sodium. Revised 2020. Table IB.

(xxxii) 3500-V, Vanadium. 2011. Table IB.

(xxxiii) 3500-Zn, Zinc. Revised 2020. Table IB.

(xxxiv) 4110, Determination of Anions by Ion Chromatography. Revised 2020. Table IB.

(xxxv) 4140, Inorganic Anions by Capillary Ion Electrophoresis. Revised 2020. Table IB.

(xxxvi) 4500-B, Boron. 2011. Table IB.

(xxxvii) 4500 Cl , Chloride. Revised 2021. Table IB.

(xxxviii) 4500-Cl, Chlorine (Residual). 2011. Table IB.

(xxxix) 4500-CN , Cyanide. Revised 2021. Table IB.

(xl) 4500-F , Fluoride. Revised 2021. Table IB.

(xli) 4500-H + , pH. 2021. Table IB.

(xlii) 4500-NH 3 , Nitrogen (Ammonia). Revised 2021. Table IB.

(xliii) 4500-NO 2 , Nitrogen (Nitrite). Revised 2021. Table IB.

(xliv) 4500-NO 3 , Nitrogen (Nitrate). Revised 2019. Table IB.

(xlv) 4500-N (org) , Nitrogen (Organic). Revised 2021. Table IB.

(xlvi) 4500-O, Oxygen (Dissolved). Revised 2021. Table IB.

(xlvii) 4500-P, Phosphorus. Revised 2021. Table IB.

(xlviii) 4500-SiO 2 , Silica. Revised 2021. Table IB.

(xlix) 4500-S 2− , Sulfide. Revised 2021. Table IB.

(l) 4500-SO 32− , Sulfite. Revised 2021. Table IB.

(li) 4500-SO 42− , Sulfate. Revised 2021. Table IB.

(lii) 5210, Biochemical Oxygen Demand (BOD). Revised 2016. Table IB.

(liii) 5220, Chemical Oxygen Demand (COD). 2011. Table IB.

(liv) 5310, Total Organic Carbon (TOC). Revised 2014. Table IB.

(lv) 5520, Oil and Grease. Revised 2021. Table IB.

(lvi) 5530, Phenols. Revised 2021. Table IB.

(lvii) 5540, Surfactants. Revised 2021. Table IB.

(lviii) 6200, Volatile Organic Compounds. Revised 2020. Table IC.

(lix) 6410, Extractable Base/Neutrals and Acids. Revised 2020. Tables IC and ID.

(lx) 6420, Phenols. Revised 2021. Table IC.

(lxi) 6440, Polynuclear Aromatic Hydrocarbons. Revised 2021. Table IC.

(lxii) 6630, Organochlorine Pesticides. Revised 2021. Table ID.

(lxiii) 6640, Acidic Herbicide Compounds. Revised 2021. Table ID.

(lxiv) 7110, Gross Alpha and Gross Beta Radioactivity (Total, Suspended, and Dissolved). 2000. Table IE.

(lxv) 7500, Radium. 2001. Table IE.

(lxvi) 9213, Recreational Waters. 2007. Table IH.

(lxvii) 9221, Multiple-Tube Fermentation Technique for Members of the Coliform Group. Approved 2014. Table IA, Notes 12, 14; and 33; Table IH, Notes 10, 12, and 32.

(lxviii) 9222, Membrane Filter Technique for Members of the Coliform Group. 2015. Table IA, Note 31; Table IH, Note 17.

(lxix) 9223 Enzyme Substrate Coliform Test. 2016. Table IA; Table IH.

(lxx) 9230 Fecal Enterococcus/Streptococcus Groups. 2013. Table IA, Note 32; Table IH.

(11) The Analyst, The Royal Society of Chemistry, RSC Publishing, Royal Society of Chemistry, Thomas Graham House, Science Park, Milton Road, Cambridge CB4 0WF, United Kingdom. (Also available from most public libraries.)

(i) Spectrophotometric Determination of Ammonia: A Study of a Modified Berthelot Reaction Using Salicylate and Dichloroisocyanurate. Krom, M.D. 105:305-316, April 1980. Table IB, Note 60.

(ii) [Reserved]

(12) Analytical Chemistry, ACS Publications, 1155 Sixteenth St. NW., Washington DC 20036. (Also available from most public libraries.)

(i) Spectrophotometric and Kinetics Investigation of the Berthelot Reaction for the Determination of Ammonia. Patton, C.J. and S.R. Crouch. 49(3):464-469, March 1977. Table IB, Note 60.

(ii) [Reserved]

(13) AOAC International, 481 North Frederick Avenue, Suite 500, Gaithersburg, MD 20877-2417.

(i) Official Methods of Analysis of AOAC International. 16th Edition, 4th Revision, 1998.

(A) 920.203, Manganese in Water, Persulfate Method. Table IB, Note 3.

(B) 925.54, Sulfate in Water, Gravimetric Method. Table IB, Note 3.

(C) 973.40, Specific Conductance of Water. Table IB, Note 3.

(D) 973.41, pH of Water. Table IB, Note 3.

(E) 973.43, Alkalinity of Water, Titrimetric Method. Table IB, Note 3.

(F) 973.44, Biochemical Oxygen Demand (BOD) of Water, Incubation Method. Table IB, Note 3.

(G) 973.45, Oxygen (Dissolved) in Water, Titrimetric Methods. Table IB, Note 3.

(H) 973.46, Chemical Oxygen Demand (COD) of Water, Titrimetric Methods. Table IB, Note 3.

(I) 973.47, Organic Carbon in Water, Infrared Analyzer Method. Table IB, Note 3.

(J) 973.48, Nitrogen (Total) in Water, Kjeldahl Method. Table IB, Note 3.

(K) 973.49, Nitrogen (Ammonia) in Water, Colorimetric Method. Table IB, Note 3.

(L) 973.50, Nitrogen (Nitrate) in Water, Brucine Colorimetric Method. Table IB, Note 3.

(M) 973.51, Chloride in Water, Mercuric Nitrate Method. Table IB, Note 3.

(N) 973.52, Hardness of Water. Table IB, Note 3.

(O) 973.53, Potassium in Water, Atomic Absorption Spectrophotometric Method. Table IB, Note 3.

(P) 973.54, Sodium in Water, Atomic Absorption Spectrophotometric Method. Table IB, Note 3.

(Q) 973.55, Phosphorus in Water, Photometric Method. Table IB, Note 3.

(R) 973.56, Phosphorus in Water, Automated Method. Table IB, Note 3.

(S) 974.27, Cadmium, Chromium, Copper, Iron, Lead, Magnesium, Manganese, Silver, Zinc in Water, Atomic Absorption Spectrophotometric Method. Table IB, Note 3.

(T) 977.22, Mercury in Water, Flameless Atomic Absorption Spectrophotometric Method. Table IB, Note 3.

(U) 991.15. Total Coliforms and Escherichia coli in Water Defined Substrate Technology (Colilert) Method. Table IA, Note 10; Table IH, Note 10.

(V) 993.14, Trace Elements in Waters and Wastewaters, Inductively Coupled Plasma-Mass Spectrometric Method. Table IB, Note 3.

(W) 993.23, Dissolved Hexavalent Chromium in Drinking Water, Ground Water, and Industrial Wastewater Effluents, Ion Chromatographic Method. Table IB, Note 3.

(X) 993.30, Inorganic Anions in Water, Ion Chromatographic Method. Table IB, Note 3.

(ii) [Reserved]

(14) Applied and Environmental Microbiology, American Society for Microbiology, 1752 N Street NW., Washington DC 20036. (Also available from most public libraries.)

(i) New Medium for the Simultaneous Detection of Total Coliforms and Escherichia coli in Water. Brenner, K.P., C.C. Rankin, Y.R. Roybal, G.N. Stelma, Jr., P.V. Scarpino, and A.P. Dufour. 59:3534-3544, November 1993. Table IH, Note 21.

(ii) [Reserved]

(15) ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959; phone: (877)909-2786; website: www.astm.org.

(i) Annual Book of ASTM Standards, Water, and Environmental Technology, Section 11, Volumes 11.01 and 11.02. 1994. Tables IA, IB, IC, ID, IE, and IH.

(ii) Annual Book of ASTM Standards, Water, and Environmental Technology, Section 11, Volumes 11.01 and 11.02. 1996. Tables IA, IB, IC, ID, IE, and IH.

(iii) Annual Book of ASTM Standards, Water, and Environmental Technology, Section 11, Volumes 11.01 and 11.02. 1999. Tables IA, IB, IC, ID, IE, and IH.

(iv) Annual Book of ASTM Standards, Water, and Environmental Technology, Section 11, Volumes 11.01 and 11.02. 2000. Tables IA, IB, IC, ID, IE, and IH.

(v) ASTM D511-14, Standard Test Methods for Calcium and Magnesium in Water. Approved October 1, 2014. Table IB.

(vi) ASTM D512-12, Standard Test Methods for Chloride Ion in Water. Approved June 15, 2012. Table IB.

(vii) ASTM D515-88, Test Methods for Phosphorus in Water, March 1989. Table IB.

(viii) ASTM D516-16, Standard Test Method for Sulfate Ion in Water. Approved June 1, 2016. Table IB.

(ix) ASTM D858-17, Standard Test Methods for Manganese in Water. Approved June 1, 2017. Table IB.

(x) ASTM D859-16, Standard Test Method for Silica in Water. Approved June 15, 2016. Table IB.

(xi) ASTM D888-18, Standard Test Methods for Dissolved Oxygen in Water. Approved May 1, 2018. Table IB.

(xii) ASTM D1067-16, Standard Test Methods for Acidity or Alkalinity of Water. Approved June 15, 2016. Table IB.

(xiii) ASTM D1068-15, Standard Test Methods for Iron in Water. Approved October 1, 2015. Table IB.

(xiv) ASTM D1125-95 (Reapproved 1999), Standard Test Methods for Electrical Conductivity and Resistivity of Water. December 1995. Table IB.

(xv) ASTM D1126-17, Standard Test Method for Hardness in Water. Approved December 1, 2017. Table IB.

(xvi) ASTM D1179-16, Standard Test Methods for Fluoride Ion in Water. Approved June 15, 2016. Table IB.

(xvii) ASTM D1246-16, Standard Test Method for Bromide Ion in Water. June 15, 2016. Table IB.

(xviii) ASTM D1252-06 (Reapproved 2012), Standard Test Methods for Chemical Oxygen Demand (Dichromate Oxygen Demand) of Water. Approved June 15, 2012. Table IB.

(xix) ASTM D1253-14, Standard Test Method for Residual Chlorine in Water. Approved January 15, 2014. Table IB.

(xx) ASTM D1293-18, Standard Test Methods for pH of Water. Approved January 15, 2018. Table IB.

(xxi) ASTM D1426-15, Standard Test Methods for Ammonia Nitrogen in Water. Approved March 15, 2015. Table IB.

(xxii) ASTM D1687-17, Standard Test Methods for Chromium in Water. Approved June 1, 2017. Table IB.

(xxiii) ASTM D1688-17, Standard Test Methods for Copper in Water. Approved June 1, 2017. Table IB.

(xxiv) ASTM D1691-17, Standard Test Methods for Zinc in Water. Approved June 1, 2017. Table IB.

(xxv) ASTM D1783-01 (Reapproved 2012), Standard Test Methods for Phenolic Compounds in Water. Approved June 15, 2012. Table IB.

(xxvi) ASTM D1886-14, Standard Test Methods for Nickel in Water. Approved October 1, 2014. Table IB.

(xxvii) ASTM D1889-00, Standard Test Method for Turbidity of Water. October 2000. Table IB.

(xxviii) ASTM D1890-96, Standard Test Method for Beta Particle Radioactivity of Water. April 1996. Table IE.

(xxix) ASTM D1943-96, Standard Test Method for Alpha Particle Radioactivity of Water. April 1996. Table IE.

(xxx) ASTM D1976-20, Standard Test Method for Elements in Water by Inductively-Coupled Argon Plasma Atomic Emission Spectroscopy. Approved May 1, 2020. Table IB.

(xxxi) ASTM D2036-09 (Reapproved 2015), Standard Test Methods for Cyanides in Water. Approved July 15, 2015. Table IB.

(xxxii) ASTM D2330-20, Standard Test Method for Methylene Blue Active Substances. Approved January 1, 2020. Table 1B.

(xxxiii) ASTM D2460-97, Standard Test Method for Alpha-Particle-Emitting Isotopes of Radium in Water. October 1997. Table IE.

(xxxiv) ASTM D2972-15, Standard Tests Method for Arsenic in Water. Approved February 1, 2015. Table IB.

(xxxv) ASTM D3223-17, Standard Test Method for Total Mercury in Water. Approved June 1, 2017. Table IB.

(xxxvi) ASTM D3371-95, Standard Test Method for Nitriles in Aqueous Solution by Gas-Liquid Chromatography, February 1996. Table IF.

(xxxvii) ASTM D3373-17, Standard Test Method for Vanadium in Water. Approved June 1, 2017. Table IB.

(xxxviii) ASTM D3454-97, Standard Test Method for Radium-226 in Water. February 1998. Table IE.

(xxxix) ASTM D3557-17, Standard Test Method for Cadmium in Water. Approved June 1, 2017. Table IB.

(xl) ASTM D3558-15, Standard Test Method for Cobalt in Water. Approved February 1, 2015. Table IB.

(xli) ASTM D3559-15, Standard Test Methods for Lead in Water. Approved June 1, 2015. Table IB.

(xlii) ASTM D3590-17, Standard Test Methods for Total Kjeldahl Nitrogen in Water. Approved June 1, 2017. Table IB.

(xliii) ASTM D3645-15, Standard Test Methods for Beryllium in Water. Approved February 1, 2015. Table IB.

(xliv) ASTM D3695-95, Standard Test Method for Volatile Alcohols in Water by Direct Aqueous-Injection Gas Chromatography. April 1995. Table IF.

(xlv) ASTM D3859-15, Standard Test Methods for Selenium in Water. Approved March 15, 2015. Table IB.

(xlvi) ASTM D3867-16, Standard Test Method for Nitrite-Nitrate in Water. Approved June 1, 2016. Table IB.

(xlvii) ASTM D4190-15, Standard Test Method for Elements in Water by Direct- Current Plasma Atomic Emission Spectroscopy. Approved February 1, 2015. Table IB.

(xlviii) ASTM D4282-15, Standard Test Method for Determination of Free Cyanide in Water and Wastewater by Microdiffusion. Approved July 15, 2015. Table IB.

(xlix) ASTM D4327-17, Standard Test Method for Anions in Water by Suppressed Ion Chromatography. Approved December 1, 2017. Table IB.

(l) ASTM D4382-18, Standard Test Method for Barium in Water, Atomic Absorption Spectrophotometry, Graphite Furnace. Approved February 1, 2018. Table IB.

(li) ASTM D4657-92 (Reapproved 1998), Standard Test Method for Polynuclear Aromatic Hydrocarbons in Water. January 1993. Table IC.

(lii) ASTM D4658-15, Standard Test Method for Sulfide Ion in Water. Approved March 15, 2015. Table IB.

(liii) ASTM D4763-88 (Reapproved 2001), Standard Practice for Identification of Chemicals in Water by Fluorescence Spectroscopy. September 1988. Table IF.

(liv) ASTM D4839-03 (Reapproved 2017), Standard Test Method for Total Carbon and Organic Carbon in Water by Ultraviolet, or Persulfate Oxidation, or Both, and Infrared Detection. Approved December 15, 2017. Table IB.

(lv) ASTM D5257-17, Standard Test Method for Dissolved Hexavalent Chromium in Water by Ion Chromatography. Approved December 1, 2017. Table IB.

(lvi) ASTM D5259-92, Standard Test Method for Isolation and Enumeration of Enterococci from Water by the Membrane Filter Procedure. October 1992. Table IH, Note 9.

(lvii) ASTM D5392-93, Standard Test Method for Isolation and Enumeration of Escherichia coli in Water by the Two-Step Membrane Filter Procedure. September 1993. Table IH, Note 9.

(lviii) ASTM D5673-16, Standard Test Method for Elements in Water by Inductively Coupled Plasma—Mass Spectrometry. Approved February 1, 2016. Table IB.

(lix) ASTM D5907-18, Standard Test Methods for Filterable Matter (Total Dissolved Solids) and Nonfilterable Matter (Total Suspended Solids) in Water. Approved May 1, 2018. Table IB.

(lx) ASTM D6503-99, Standard Test Method for Enterococci in Water Using Enterolert. April 2000. Table IA Note 9, Table IH, Note 9.

(lxi) ASTM. D6508-15, Standard Test Method for Determination of Dissolved Inorganic Anions in Aqueous Matrices Using Capillary Ion Electrophoresis and Chromate Electrolyte. Approved October 1, 2015. Table IB, Note 54.

(lxii) ASTM. D6888-16, Standard Test Method for Available Cyanides with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection. Approved February 1, 2016. Table IB, Note 59.

(lxiii) ASTM. D6919-17, Standard Test Method for Determination of Dissolved Alkali and Alkaline Earth Cations and Ammonium in Water and Wastewater by Ion Chromatography. Approved June 1, 2017. Table IB.

(lxiv) ASTM. D7065-17, Standard Test Method for Determination of Nonylphenol, Bisphenol A, p-tert -Octylphenol, Nonylphenol Monoethoxylate and Nonylphenol Diethoxylate in Environmental Waters by Gas Chromatography Mass Spectrometry. Approved December 15, 2017. Table IC.

(lxv) ASTM D7237-18, Standard Test Method for Free Cyanide with Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection. Approved December 1, 2018. Table IB.

(lxvi) ASTM D7284-20, Standard Test Method for Total Cyanide in Water by Micro Distillation followed by Flow Injection Analysis with Gas Diffusion Separation and Amperometric Detection. Approved August 1, 2020. Table IB.

(lxvii) ASTM D7365-09a (Reapproved 2015), Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide. Approved July 15, 2015. Table II, Notes 5 and 6.

(lxviii) ASTM. D7511-12 (Reapproved 2017) e1 , Standard Test Method for Total Cyanide by Segmented Flow Injection Analysis, In-Line Ultraviolet Digestion and Amperometric Detection. Approved July 1, 2017. Table IB.

(lxix) ASTM D7573-18a e1 , Standard Test Method for Total Carbon and Organic Carbon in Water by High Temperature Catalytic Combustion and Infrared Detection. Approved December 15, 2018. Table IB.

(lxx) ASTM D7781-14, Standard Test Method for Nitrite-Nitrate in Water by Nitrate Reductase, Approved April 1, 2014. Table IB.

(16) Bran & Luebbe Analyzing Technologies, Inc., Elmsford NY 10523.

(i) Industrial Method Number 378-75WA, Hydrogen Ion (pH) Automated Electrode Method, Bran & Luebbe (Technicon) Auto Analyzer II. October 1976. Table IB, Note 21.

(ii) [Reserved]

(17) CEM Corporation, P.O. Box 200, Matthews NC 28106-0200.

(i) Closed Vessel Microwave Digestion of Wastewater Samples for Determination of Metals. April 16, 1992. Table IB, Note 36.

(ii) [Reserved]

(18) Craig R. Chinchilla, 900 Jorie Blvd., Suite 35, Oak Brook IL 60523. Telephone: 630-645-0600.

(i) Nitrate by Discrete Analysis Easy (1-Reagent) Nitrate Method, (Colorimetric, Automated, 1 Reagent). Revision 1, November 12, 2011. Table IB, Note 62.

(ii) [Reserved]

(19) FIAlab Instruments, Inc., 334 2151 N. Northlake Way, Seattle, WA 98103; phone: (425)376-0450; website: www.flowinjection.com/app-notes/epafialab100.

(i) FIAlab 100, Determination of Inorganic Ammonia by Continuous Flow Gas Diffusion and Fluorescence Detector Analysis, April 4, 2018. Table IB, Note 82.

(ii) [Reserved]

(20) Hach Company, P.O. Box 389, Loveland CO 80537.

(i) Method 8000, Chemical Oxygen Demand. Hach Handbook of Water Analysis. 1979. Table IB, Note 14.

(ii) Method 8008, 1,10-Phenanthroline Method using FerroVer Iron Reagent for Water. 1980. Table IB, Note 22.

(iii) Method 8009, Zincon Method for Zinc. Hach Handbook for Water Analysis. 1979. Table IB, Note 33.

(iv) Method 8034, Periodate Oxidation Method for Manganese. Hach Handbook for Water Analysis. 1979. Table IB, Note 23.

(v) Method 8506, Bicinchoninate Method for Copper. Hach Handbook of Water Analysis. 1979. Table IB, Note 19.

(vi) Method 8507, Nitrogen, Nitrite-Low Range, Diazotization Method for Water and Wastewater. 1979. Table IB, Note 25.

(vii) Method 10206, Hach Company TNTplus 835/836 Nitrate Method 10206, Spectrophotometric Measurement of Nitrate in Water and Wastewater. Revision 2.1, January 10, 2013. Table IB, Note 75.

(viii) Method 10242, Hach Company TNTplus 880 Total Kjeldahl Nitrogen Method 10242, Simplified Spectrophotometric Measurement of Total Kjeldahl Nitrogen in Water and Wastewater. Revision 1.1, January 10, 2013. Table IB, Note 76.

(ix) Hach Method 10360, Luminescence Measurement of Dissolved Oxygen in Water and Wastewater and for Use in the Determination of BOD5and cBOD5. Revision 1.2, October 2011. Table IB, Note 63.

(x) m-ColiBlue24® Method, for total Coliforms and E. coli. Revision 2, 1999. Table IA, Note 18; Table IH, Note 17.

(21) IDEXX Laboratories Inc., One Idexx Drive, Westbrook ME 04092.

(i) Colilert. 2013. Table IA, Notes 17 and 18; Table IH, Notes 14, 15 and 16.

(ii) Colilert-18. 2013. Table IA, Notes 17 and 18; Table IH, Notes 14, 15 and 16.

(iii) Enterolert. 2013. Table IA, Note 24; Table IH, Note 12.

(iv) Quanti-Tray Insert and Most Probable Number (MPN) Table. 2013. Table IA, Note 18; Table IH, Notes 14 and 16.

(22) In-Situ Incorporated, 221 E. Lincoln Ave., Ft. Collins CO 80524. Telephone: 970-498-1500.

(i) In-Situ Inc. Method 1002-8-2009, Dissolved Oxygen Measurement by Optical Probe. 2009. Table IB, Note 64.

(ii) In-Situ Inc. Method 1003-8-2009, Biochemical Oxygen Demand (BOD) Measurement by Optical Probe. 2009. Table IB, Note 10.

(iii) In-Situ Inc. Method 1004-8-2009, Carbonaceous Biochemical Oxygen Demand (CBOD) Measurement by Optical Probe. 2009. Table IB, Note 35.

(23) Journal of Chromatography, Elsevier/North-Holland, Inc., Journal Information Centre, 52 Vanderbilt Avenue, New York NY 10164. (Also available from most public libraries.

(i) Direct Determination of Elemental Phosphorus by Gas-Liquid Chromatography. Addison, R.F. and R.G. Ackman. 47(3): 421-426, 1970. Table IB, Note 28.

(ii) [Reserved]

(24) Lachat Instruments, 6645 W. Mill Road, Milwaukee WI 53218, Telephone: 414-358-4200.

(i) QuikChem Method 10-204-00-1-X, Digestion and Distillation of Total Cyanide in Drinking and Wastewaters using MICRO DIST and Determination of Cyanide by Flow Injection Analysis. Revision 2.2, March 2005. Table IB, Note 56.

(ii) [Reserved]

(25) Leck Mitchell, Ph.D., P.E., 656 Independence Valley Dr., Grand Junction CO 81507. Telephone: 970-244-8661.

(i) Mitchell Method M5271, Determination of Turbidity by Nephelometry. Revision 1.0, July 31, 2008. Table IB, Note 66.

(ii) Mitchell Method M5331, Determination of Turbidity by Nephelometry. Revision 1.0, July 31, 2008. Table IB, Note 65.

(26) MACHEREY-NAGEL GmbH and Co., 2850 Emrick Blvd., Bethlehem, PA 18020; Phone: (888)321-6224.

(i) Method 036/038 NANOCOLOR® COD LR/HR, Spectrophotometric Measurement of Chemical Oxygen Demand in Water and Wastewater, Revision 1.5, May 2018. Table IB, Note 83.

(ii) [Reserved]

(27) Micrology Laboratories, LLC (now known as Roth Bioscience, LLC), 1303 Eisenhower Drive, Goshen, IN 46526; phone: (574)533-3351.

(i) KwikCount TM EC Medium E. coli enzyme substrate test, Rapid Detection of E. coli in Beach Water By KwikCount TM EC Membrane Filtration. 2014. Table IH, Notes 28 and 29.

(ii) [Reserved]

(28) National Council of the Paper Industry for Air and Stream Improvements, Inc. (NCASI), 260 Madison Avenue, New York NY 10016.

(i) NCASI Method TNTP-W10900, Total Nitrogen and Total Phophorus in Pulp and Paper Biologically Treated Effluent by Alkaline Persulfate Digestion. June 2011. Table IB, Note 77.

(ii) NCASI Technical Bulletin No. 253, An Investigation of Improved Procedures for Measurement of Mill Effluent and Receiving Water Color. December 1971. Table IB, Note 18.

(iii) NCASI Technical Bulletin No. 803, An Update of Procedures for the Measurement of Color in Pulp Mill Wastewaters. May 2000. Table IB, Note 18.

(29) The Nitrate Elimination Co., Inc. (NECi), 334 Hecla St., Lake Linden NI 49945.

(i) NECi Method N07-0003, Method for Nitrate Reductase Nitrate-Nitrogen Analysis. Revision 9.0. March 2014. Table IB, Note 73.

(ii) [Reserved]

(30) Oceanography International Corporation, 512 West Loop, P.O. Box 2980, College Station TX 77840.

(i) OIC Chemical Oxygen Demand Method. 1978. Table IB, Note 13.

(ii) [Reserved]

(31) OI Analytical, Box 9010, College Station TX 77820-9010.

(i) Method OIA-1677-09, Available Cyanide by Ligand Exchange and Flow Injection Analysis (FIA). Copyright 2010. Table IB, Note 59.

(ii) Method PAI-DK01, Nitrogen, Total Kjeldahl, Block Digestion, Steam Distillation, Titrimetric Detection. Revised December 22, 1994. Table IB, Note 39.

(iii) Method PAI-DK02, Nitrogen, Total Kjeldahl, Block Digestion, Steam Distillation, Colorimetric Detection. Revised December 22, 1994. Table IB, Note 40.

(iv) Method PAI-DK03, Nitrogen, Total Kjeldahl, Block Digestion, Automated FIA Gas Diffusion. Revised December 22, 1994. Table IB, Note 41.

(32) ORION Research Corporation, 840 Memorial Drive, Cambridge, Massachusetts 02138.

(i) ORION Research Instruction Manual, Residual Chlorine Electrode Model 97-70. 1977. Table IB, Note 16.

(ii) [Reserved]

(33) Pace Analytical Services, LLC, 1800 Elm Street, SE, Minneapolis, MN 55414; phone: (612)656-2240.

(i) PAM-16130-SSI, Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo- p -Dioxins and Dibenzofurans (CDDs/CDFs) Using Shimadzu Gas Chromatography Mass Spectrometry (GC-MS/MS), Revision 1.1, May 20, 2022. Table IC, Note 17.

(ii) [Reserved]

(34) SGS AXYS Analytical Services, Ltd., 2045 Mills Road, Sidney, British Columbia, Canada, V8L 5X2; phone: (888)373-0881.

(i) SGS AXYS Method 16130, Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo- p -Dioxins and Dibenzofurans (CDDs/CDFs) Using Waters and Agilent Gas Chromatography-Mass Spectrometry (GC/MS/MS)., Revision 1.0, revised August 2020. Table IC, Note 16.

(ii) [Reserved]

(35) Technicon Industrial Systems, Tarrytown NY 10591.

(i) Industrial Method Number 379-75WE Ammonia, Automated Electrode Method, Technicon Auto Analyzer II. February 19, 1976. Table IB, Note 7.

(ii) [Reserved]

(36) Thermo Jarrell Ash Corporation, 27 Forge Parkway, Franklin MA 02038.

(i) Method AES0029. Direct Current Plasma (DCP) Optical Emission Spectrometric Method for Trace Elemental Analysis of Water and Wastes. 1986, Revised 1991. Table IB, Note 34.

(ii) [Reserved]

(37) Thermo Scientific, 166 Cummings Center, Beverly MA 01915. Telephone: 1-800-225-1480. www.thermoscientific.com.

(i) Thermo Scientific Orion Method AQ4500, Determination of Turbidity by Nephelometry. Revision 5, March 12, 2009. Table IB, Note 67.

(ii) [Reserved]

(38) 3M Corporation, 3M Center Building 220-9E-10, St. Paul MN 55144-1000.

(i) Organochlorine Pesticides and PCBs in Wastewater Using EmporeTMDisk” Test Method 3M 0222. Revised October 28, 1994. Table IC, Note 8; Table ID, Note 8.

(ii) [Reserved]

(39) Timberline Instruments, LLC, 1880 South Flatiron Ct., Unit I, Boulder CO 80301.

(i) Timberline Amonia-001, Determination of Inorganic Ammonia by Continuous Flow Gas Diffusion and Conductivity Cell Analysis. June 24, 2011. Table IB, Note 74.

(ii) [Reserved]

(40) U.S. Geological Survey (USGS), U.S. Department of the Interior, Reston, Virginia. Available from USGS Books and Open-File Reports (OFR) Section, Federal Center, Box 25425, Denver, CO 80225; phone: (703)648-5953; website: ww.usgs.gov.

(i) Colorimetric determination of nitrate plus nitrite in water by enzymatic reduction, automated discrete analyzer methods. U.S. Geological Survey Techniques and Methods, Book 5—Laboratory Analysis, Section B—Methods of the National Water Quality Laboratory, Chapter 8. 2011. Table IB, Note 72.

(ii) Techniques and Methods—Book 5, Laboratory Analysis—Section B, Methods of the National Water Quality Laboratory—Chapter 12, Determination of Heat Purgeable and Ambient Purgeable Volatile Organic Compounds in Water by Gas Chromatography/Mass Spectrometry 2016.

(iii) Methods for Determination of Inorganic Substances in Water and Fluvial Sediments, editors, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A1. 1979. Table IB, Note 8.

(iv) Methods for Determination of Inorganic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A1. 1989. Table IB, Notes 2 and 79.

(v) Methods for the Determination of Organic Substances in Water and Fluvial Sediments. Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A3. 1987. Table IB, Note 24; Table ID, Note 4.

(vi) OFR 76-177, Selected Methods of the U.S. Geological Survey of Analysis of Wastewaters. 1976. Table IE, Note 2.

(vii) OFR 91-519, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Organonitrogen Herbicides in Water by Solid-Phase Extraction and Capillary-Column Gas Chromatography/Mass Spectrometry With Selected-Ion Monitoring. 1992. Table ID, Note 14.

(viii) OFR 92-146, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Total Phosphorus by a Kjeldahl Digestion Method and an Automated Colorimetric Finish That Includes Dialysis. 1992. Table IB, Note 48.

(ix) OFR 93-125, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Inorganic and Organic Constituents in Water and Fluvial Sediments. 1993. Table IB, Notes 51 and 80; Table IC, Note 9.

(x) OFR 93-449, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Chromium in Water by Graphite Furnace Atomic Absorption Spectrophotometry. 1993. Table IB, Note 46.

(xi) OFR 94-37, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Triazine and Other Nitrogen-containing Compounds by Gas Chromatography with Nitrogen Phosphorus Detectors. 1994. Table ID, Note 9.

(xii) OFR 95-181, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Pesticides in Water by C-18 Solid-Phase Extraction and Capillary-Column Gas Chromatography/Mass Spectrometry With Selected-Ion Monitoring. 1995. Table ID, Note 11.

(xiii) OFR 97-198, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Molybdenum in Water by Graphite Furnace Atomic Absorption Spectrophotometry. 1997. Table IB, Note 47.

(xiv) OFR 97-829, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of 86 Volatile Organic Compounds in Water by Gas Chromatography/Mass Spectrometry, Including Detections Less Than Reporting Limits. 1998. Table IC, Note 13.

(xv) OFR 98-165, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Elements in Whole-Water Digests Using Inductively Coupled Plasma-Optical Emission Spectrometry and Inductively Coupled Plasma-Mass Spectrometry. 1998. Table IB, Notes 50 and 81.

(xvi) OFR 98-639, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Arsenic and Selenium in Water and Sediment by Graphite Furnace—Atomic Absorption Spectrometry. 1999. Table IB, Note 49.

(xvii) OFR 00-170, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Ammonium Plus Organic Nitrogen by a Kjeldahl Digestion Method and an Automated Photometric Finish that Includes Digest Cleanup by Gas Diffusion. 2000. Table IB, Note 45.

(xviii) Techniques and Methods Book 5-B1, Determination of Elements in Natural-Water, Biota, Sediment and Soil Samples Using Collision/Reaction Cell Inductively Coupled Plasma-Mass Spectrometry. Chapter 1, Section B, Methods of the National Water Quality Laboratory, Book 5, Laboratory Analysis. 2006. Table IB, Note 70.

(xix) U.S. Geological Survey Techniques of Water-Resources Investigations, Book 5, Laboratory Analysis, Chapter A4, Methods for Collection and Analysis of Aquatic Biological and Microbiological Samples. 1989. Table IA, Note 4; Table IH, Note 4.

(xx) Water-Resources Investigation Report 01-4098, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Moderate-Use Pesticides and Selected Degradates in Water by C-18 Solid-Phase Extraction and Gas Chromatography/Mass Spectrometry. 2001. Table ID, Note 13.

(xxi) Water-Resources Investigations Report 01-4132, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Organic Plus Inorganic Mercury in Filtered and Unfiltered Natural Water With Cold Vapor-Atomic Fluorescence Spectrometry. 2001. Table IB, Note 71.

(xxii) Water-Resources Investigation Report 01-4134, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Pesticides in Water by Graphitized Carbon-Based Solid-Phase Extraction and High-Performance Liquid Chromatography/Mass Spectrometry. 2001. Table ID, Note 12.

(xxiii) Water Temperature—Influential Factors, Field Measurement and Data Presentation, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 1, Chapter D1. 1975. Table IB, Note 32.

(41) Waters Corporation, 34 Maple Street, Milford MA 01757, Telephone: 508-482-2131, Fax: 508-482-3625. (i) Method D6508, Test Method for Determination of Dissolved Inorganic Anions in Aqueous Matrices Using Capillary Ion Electrophoresis and Chromate Electrolyte. Revision 2, December 2000. Table IB, Note 54. (ii) [Reserved]

(i) Method D6508, Test Method for Determination of Dissolved Inorganic Anions in Aqueous Matrices Using Capillary Ion Electrophoresis and Chromate Electrolyte. Revision 2, December 2000. Table IB, Note 54.

(ii) [Reserved]

* * * *

(e)

* * * *

Table II—Required Containers, Preservation Techniques, and Holding Times

* * * *

5 ASTM D7365-09a (15) specifies treatment options for samples containing oxidants (e.g ., chlorine) for cyanide analyses. Also, Section 9060A of Standard Methods for the Examination of Water and Wastewater (23rd edition) addresses dechlorination procedures for microbiological analyses.

2024-04-08T05:00:00Z

EPA Proposed Rule: Significant New Use Rules

EPA is proposing significant new use rules (SNURs) under the Toxic Substances Control Act (TSCA) for chemical substances that were the subject of premanufacture notices (PMNs). The chemical substances received “not likely to present an unreasonable risk” determinations pursuant to TSCA. The SNURs require persons who intend to manufacture (defined by statute to include import) or process any of these chemical substances for an activity that is proposed as a significant new use by this rulemaking to notify EPA at least 90 days before commencing that activity. The required notification initiates EPA's evaluation of the use, under the conditions of use for that chemical substance. In addition, the manufacture or processing for the significant new use may not commence until EPA has conducted a review of the required notification, made an appropriate determination regarding that notification, and taken such actions as required by that determination.

DATES: This proposed rule is published in the Federal Register April 8, 2024, page 24398.

View proposed rule.

See More
New Network Poll
How are you performing safety inspections within your organization?

How are you performing safety inspections within your organization?


No active poll
Please come back soon!