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Appendix IX to Part 264—Ground-Water Monitoring List

RegSenseHazardous WasteGroundwaterWaste/HazWasteCFR RegulationsWater ProgramsEnvironmental Protection Agency (EPA)WasteTSD FacilitiesEnvironmentalSolid WasteUSAEnglishFocus AreaCFR Appendix

Ground-Water Monitoring List
Common name 1 CAS RN 2 Chemical abstracts service index name 3
1 Common names are those widely used in government regulations, scientific publications, and commerce; synonyms exist for many chemicals.
2 Chemical Abstracts Service registry number. Where “Total” is entered, all species in the ground water that contain this element are included.
3 CAS index names are those used in the 9th Cumulative Index.
4 Polychlorinated biphenyls (CAS RN 1336-36-3); this category contains congener chemicals, including constituents of Aroclor-1016 (CAS RN 12674-11-2), Aroclor-1221 (CAS RN 11104-28-2), Aroclor-1232 (CAS RN 11141-16-5), Aroclor-1242 (CAS RN 53469-21-9), Aroclor-1248 (CAS RN 12672-29-6), Aroclor-1254 (CAS RN 11097-69-1), and Aroclor-1260 (CAS RN 11096-82-5).
5 This category contains congener chemicals, including tetrachlorodibenzo-p-dioxins (see also 2,3,7,8-TCDD), pentachlorodibenzo-p-dioxins, and hexachlorodibenzo-p-dioxins.
6 This category contains congener chemicals, including tetrachlorodibenzofurans, pentachlorodibenzofurans, and hexachlorodibenzofurans.
Acenaphthene 83-32-9 Acenaphthylene, 1,2-dihydro-
Acenaphthylene 208-96-8 Acenaphthylene
Acetone 67-64-1 2-Propanone
Acetophenone 98-86-2 Ethanone, 1-phenyl-
Acetonitrile; Methyl cyanide 75-05-8 Acetonitrile
2-Acetylamino-fluorene; 2-AAF 53-96-3 Acetamide, N-9H-fluoren-2-yl-
Acrolein 107-02-8 2-Propenal
Acrylonitrile 107-13-1 2-Propenenitrile
Aldrin 309-00-2 1,4:5,8-Dimethanonaphthalene, 1,2,3,4,10,10-hexachloro-1,4,4a,5,8,8a-hexahydro-(1a,4a, 4ab,5a,8a,8ab)-
Allyl chloride 107-05-1 1-Propene, 3-chloro-
4-Aminobiphenyl 92-67-1 [1,1'-Biphenyl]- 4-amine
Aniline 62-53-3 Benzenamine
Anthracene 120-12-7 Anthracene
Antimony (Total) Antimony
Aramite 140-57-8 Sulfurous acid, 2-chloroethyl 2-[4-(1,1-dimethylethyl)phenoxy]-1-methylethyl ester
Arsenic (Total) Arsenic
Barium (Total) Barium
Benzene 71-43-2 Benzene
Benzo[a]anthracene; Benzanthracene 56-55-3 Benz[a]anthracene
Benzo[b]fluoranthene 205-99-2 Benz[e]acephenanthrylene
Benzo[k]fluoranthene 207-08-9 Benzo[k]fluoranthene
Benzo[ghi]perylene 191-24-2 Benzo[ghi]perylene
Benzo[a]pyrene 50-32-8 Benzo[a]pyrene
Benzyl alcohol 100-51-6 Benzenemethanol
Beryllium (Total) Beryllium
alpha-BHC 319-84-6 Cyclohexane, 1,2,3,4,5,6-hexachloro-,(1a,2a,3b,4a,5b,6b)-
beta-BHC 319-85-7 Cyclohexane, 1,2,3,4,5,6-hexachloro-,(1a,2b, 3a,4b,5a,6b)-
delta-BHC 319-86-8 Cyclohexane, 1,2,3,4,5,6-hexachloro-,(1a,2a, 3a,4b,5a,6b)-
gamma-BHC; Lindane 58-89-9 Cyclohexane, 1,2,3,4,5,6-hexachloro-,(1a,2a, 3b,4a,5a,6b)-
Bis(2-chloroethoxy) methane 111-91-1 Ethane, 1,1'-[methylenebis(oxy)]bis [2-chloro-
Bis(2-chloroethyl) ether 111-44-4 Ethane, 1,1'-oxybis[2-chloro-
Bis(2-chloro-1-methylethyl) ether; 2,2'-Di-chlorodiisopropylether 108-60-1 Propane, 2,2'-oxybis[1-chloro-
Bis(2-ethylhexyl) phthalate 117-81-7 1,2-Benzenedicarboxylic acid,bis(2-ethylhexyl)ester
Bromodichloromethane 75-27-4 Methane, bromodichloro-
Bromoform; Tribromomethane 75-25-2 Methane, tribromo-
4-Bromophenyl phenyl ether 101-55-3 Benzene, 1-bromo-4-phenoxy-
Butyl benzyl phthalate; Benzyl butyl phthalate 85-68-7 1,2-Benzenedicarboxylic acid, butyl phenylmethyl ester
Cadmium (Total) Cadmium
Carbon disulfide 75-15-0 Carbon disulfide
Carbon tetrachloride 56-23-5 Methane, tetrachloro-
Chlordane 57-74-9 4,7-Methano-1H-indene, 1,2,4,5,6,7,8,8-octachloro-2,3,3a,4,7,7a- hexahydro-
p-Chloroaniline 106-47-8 Benzenamine, 4-chloro-
Chlorobenzene 108-90-7 Benzene, chloro-
Chlorobenzilate 510-15-6 Benzeneacetic acid,4-chloro-a-(4-chlorophenyl)-a-hydroxy-, ethyl ester
p-Chloro-m-cresol 59-50-7 Phenol, 4-chloro-3-methyl-
Chloroethane; Ethyl chloride 75-00-3 Ethane, chloro-
Chloroform 67-66-3 Methane, trichloro-
2-Chloronaphthalene 91-58-7 Naphthalene, 2-chloro-
2-Chlorophenol 95-57-8 Phenol, 2-chloro-
4-Chlorophenyl phenyl ether 7005-72-3 Benzene, 1-chloro-4-phenoxy-
Chloroprene 126-99-8 1,3-Butadiene, 2-chloro-
Chromium (Total) Chromium
Chrysene 218-01-9 Chrysene
Cobalt (Total) Cobalt
Copper (Total) Copper
m-Cresol 108-39-4 Phenol, 3-methyl-
o-Cresol 95-48-7 Phenol, 2-methyl-
p-Cresol 106-44-5 Phenol, 4-methyl-
Cyanide 57-12-5 Cyanide
2,4-D; 2,4-Dichlorophenoyacetic acid 94-75-7 Acetic acid, (2,4-dichlorophenoxy)-
4,4'-DDD 72-54-8 Benzene 1,1'-(2,2-dichloroethylidene)bis[4-chloro-
4,4'-DDE 72-55-9 Benzene, 1,1'-(dichloroethenylidene)bis[4-chloro-
4,4'-DDT 50-29-3 Benzene, 1,1'-(2,2,2-trichloroethylidene)bis[4-chloro-
Diallate 2303-16-4 Carbamothioic acid,bis(1-methylethyl)- , S-(2,3-dichloro- 2-propenyl) ester
Dibenz[a,h]an- thracene 53-70-3 Dibenz[a,h]anthracene
Dibenzofuran 132-64-9 Dibenzofuran
Dibromochloromethane; Chlorodibromomethane 124-48-1 Methane, dibromochloro-
1,2-Dibromo-3- chloropropane; DBCP 96-12-8 Propane, 1,2-dibromo-3-chloro-
1,2-Dibromoethane;
Ethylene dibromide 		106-93-4 Ethane, 1,2-dibromo-
Di-n-butyl phthalate 84-74-2 1,2-Benzenedicarboxylic acid,dibutyl ester
o-Dichlorobenzene 95-50-1 Benzene, 1,2-dichloro-
m-Dichlorobenzene 541-73-1 Benzene, 1,3-dichloro-
p-Dichlorobenzene 106-46-7 Benzene, 1,4-dichloro-
3,3'-Dichlorobenzidine 91-94-1 [1,1'-Biphenyl]- 4,4'- diamine, 3,3'-dichloro-
trans-1,4-Dichloro-2-butene 110-57-6 2-Butene, 1,4-dichloro-, (E)-
Dichlorodifluoromethane 75-71-8 Methane, dichlorodifluoro-
1,1-Dichloroethane 75-34-3 Ethane, 1,1-dichloro-
1,2-Dichloroethane; Ethylene dichloride 107-06-2 Ethane, 1,2-dichloro-
1,1-Dichloro-ethylene; Vinylidene chloride 75-35-4 Ethene, 1,1-dichloro-
trans-1,2-Dichloroethylene 156-60-5 Ethene, 1,2-dichloro-, (E)-
2,4-Dichlorophenol 120-83-2 Phenol, 2,4-dichloro-
2,6-Dichlorophenol 87-65-0 Phenol, 2,6-dichloro-
1,2-Dichloropropane 78-87-5 Propane, 1,2-dichloro-
cis-1,3-Dichloro- propene 10061-01-5 1-Propene, 1,3-dichloro-, (Z)-
trans-1,3-Dichloro propene 10061-02-6 1-Propene, 1,3-dichloro-, (E)-
Dieldrin 60-57-1 2,7:3,6-Dimethanonaphth [2,3-b]oxirene, 3,4,5,6,9,9-hexachloro-1a,2,2a,3,6,6a,7,7a- octahydro-,(1aa,2b, 2aa,3b,6b,6aa,7b,7aa)-
Diethyl phthalate 84-66-2 1,2-Benzenedicarboxylic acid, diethyl ester
O,O-Diethyl O-2-pyrazinyl phosphorothioate; Thionazin 297-97-2 Phosphorothioic acid, O,O-diethyl O-pyrazinyl ester
Dimethoate 60-51-5 Phosphorodithioic acid, O,O-dimethyl S-[2-(methylamino)-2-oxoethyl] ester
p-(Dimethylamino) azobenzene 60-11-7 Benzenamine, N,N-dimethyl-4-(phen ylazo)-
7,12-Dimethylbenz [a]anthracene 57-97-6 Benz[a]anthracene, 7,12-dimethyl-
3,3'-Dimethylbenzi- dine 119-93-7 [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethyl-
alpha, alpha-Dimethyl- phenethylamine 122-09-8 Benzeneethanamine, a,a-dimethyl-
2,4-Dimethylphenol 105-67-9 Phenol, 2,4-dimethyl-
Dimethyl phthalate 131-11-3 1,2-Benzenedicarboxylic acid, dimethyl ester
m-Dinitrobenzene 99-65-0 Benzene, 1,3-dinitro-
4,6-Dinitro-o-cresol 534-52-1 Phenol, 2-methyl-4,6-dinitro-
2,4-Dinitrophenol 51-28-5 Phenol, 2,4-dinitro-
2,4-Dinitrotoluene 121-14-2 Benzene, 1-methyl-2,4-dinitro-
2,6-Dinitrotoluene 606-20-2 Benzene, 2-methyl-1,3-dinitro-
Dinoseb; DNBP; 2-sec-Butyl- 4,6-dinitrophenol 88-85-7 Phenol, 2-(1-methylpropyl) -4,6-dinitro-
Di-n-octyl phthalate 117-84-0 1,2-Benzenedicarboxylic acid, dioctyl ester
1,4-Dioxane 123-91-1 1,4-Dioxane
Diphenylamine 122-39-4 Benzenamine, N-phenyl-
Disulfoton 298-04-4 Phosphorodithioic acid, O,O-diethyl S-[2-(ethylthio)ethyl] ester
Endosulfan I 959-98-8 6,9-Methano-2,4,3- benzodio- xathiepin, 6,7,8,9,10,10- hexachloro- 1,5,5a,6,9,9a- hexahydro-,3-oxide, (3a,5ab,6a,9a,9ab)-
Endosulfan II 33213-65-9 6,9-Methano-2,4,3-benzodio- xathiepin, 6,7,8,9,10,10- hexachloro- 1,5,5a,6,9,9a- hexahydro-, 3-oxide,(3a,5aa, 6b,9b,9aa)-
Endosulfan sulfate 1031-07-8 6,9-Methano-2,4,3- benzodio- xathiepin, 6,7,8,9,10,10- hexachloro-1,5,5a,6, 9,9a-hexahydro-,3, 3-dioxide
Endrin 72-20-8 2,7:3,6-Dimethanonaphth[2,3-b] oxirene, 3,4,5,6,9,9- hexachloro-1a,2,2a, 3,6,6a,7,7a-octahydro-,(1aa, 2b,2ab,3a,6a, 6ab,7b,7aa)-
Endrin aldehyde 7421-93-4 1,2,4-Methenocyclo penta[cd] pentalene- 5-carboxaldehyde,2, 2a,3,3,4,7-hexachloro decahydro-,(1a,2b, 2ab,4b,4ab,5b,6ab, 6bb,7R*)-
Ethylbenzene 100-41-4 Benzene, ethyl-
Ethyl methacrylate 97-63-2 2-Propenoic acid, 2-methyl-, ethyl ester
Ethyl methanesulfonate 62-50-0 Methanesulfonic acid, ethyl ester
Famphur 52-85-7 Phosphorothioic acid, O-[4-[(dimethylamino)s ulfonyl]phenyl]-O,O- dimethyl ester
Fluoranthene 206-44-0 Fluoranthene
Fluorene 86-73-7 9H-Fluorene
Heptachlor 76-44-8 4,7-Methano-1H- indene, 1,4,5,6,7,8, 8-heptachloro- 3a,4,7,7a-tetrahydro-
Heptachlor epoxide 1024-57-3 2,5-Methano-2H-indeno[1,2-b] oxirene,2,3,4,5, 6,7,7-heptachloro- 1a,1b,5,5a,6,6a,- hexahydro-,(1aa,1bb, 2a,5a,5ab,6b,6aa)
Hexachlorobenzene 118-74-1 Benzene, hexachloro-
Hexachlorobutadiene 87-68-3 1,3-Butadiene, 1,1,2,3,4,4- hexachloro-
Hexachlorocyclo- pentadiene 77-47-4 1,3-Cyclopentadiene, 1,2,3,4,5,5-hexachloro
Hexachloroethane 67-72-1 Ethane, hexachloro-
Hexachlorophene 70-30-4 Phenol, 2,2'-methylenebis [3,4,6-trichloro
Hexachloropropene 1888-71-7 1-Propene, 1,1,2,3,3,3-hexachloro-
2-Hexanone 591-78-6 2-Hexanone
Indeno(1,2,3-cd) pyrene 193-39-5 Indeno[1,2,3-cd]pyrene
Isobutyl alcohol 78-83-1 1-Propanol, 2-methyl-
Isodrin 465-73-6 1,4,5,8-Dimethanonaphthalene,1,2, 3,4,10,10- hexachloro-1,4,4a,5, 8,8a hexahydro-(1a, 4a, 4ab, 5b,8b,8ab)-
Isophorone 78-59-1 2-Cyclohexen-1-one, 3,5,5-trimethyl-
Isosafrole 120-58-1 1,3-Benzodioxole, 5-(1-propenyl)-
Kepone 143-50-0 1,3,4-Metheno-2H- cyclobuta-[cd] pentalen- 2-one, 1,1a,3,3a,4,5,5,5a, 5b,6- decachloroo ctahydro-
Lead (Total) Lead
Mercury (Total) Mercury
Methacrylonitrile 126-98-7 2-Propenenitrile, 2-methyl-
Methapyrilene 91-80-5 1,2,Ethanediamine, N,N-dimethyl-N'-2- pyridinyl- N'-(2-thienylmethyl)-
Methoxychlor 72-43-5 Benzene, 1,1'-(2,2,2,trichlor oethylidene)bis [4-methoxy-
Methyl bromide; Bromomethane 74-83-9 Methane, bromo-
Methyl chloride; Chloromethane 74-87-3 Methane, chloro-
3-Methylcholanthrene 56-49-5 Benz[j]aceanthrylene, 1,2-dihydro-3- methyl-
Methylene bromide; Dibromomethane 74-95-3 Methane, dibromo-
Methylene chloride; Dichloromethane 75-09-2 Methane, dichloro-
Methyl ethyl ketone; MEK; 78-93-3 2-Butanone
Methyl iodide; Iodomethane 74-88-4 Methane, iodo-
Methyl methacrylate 80-62-6 2-Propenoic acid, 2-methyl-, methyl ester
Methyl methanesulfonate 66-27-3 Methanesulfonic acid, methyl ester
2-Methylnaphthalene 91-57-6 Naphthalene, 2-methyl-
Methyl parathion; 298-00-0 Phosphorothioic acid,
Parathion methyl O,O-dimethyl O-(4-nitrophenyl) ester
4-Methyl-2- pentanone; Methyl isobutyl ketone 108-10-1 2-Pentanone, 4-methyl-
Naphthalene 91-20-3 Naphthalene
1,4-Naphthoquinone 130-15-4 1,4-Naphthalenedione
1-Naphthylamine 134-32-7 1-Naphthalenamine
2-Naphthylamine 91-59-8 2-Naphthalenamine
Nickel (Total) Nickel
o-Nitroaniline 88-74-4 Benzenamine, 2-nitro-
m-Nitroaniline 99-09-2 Benzenamine, 3-nitro-
p-Nitroaniline 100-01-6 Benzenamine, 4-nitro-
Nitrobenzene 98-95-3 Benzene, nitro-
o-Nitrophenol 88-75-5 Phenol, 2-nitro-
p-Nitrophenol 100-02-7 Phenol, 4-nitro-
4-Nitroquinoline 1-oxide 56-57-5 Quinoline, 4-nitro-, 1-oxide
N-Nitrosodi-n- butylamine 924-16-3 1-Butanamine, N-butyl-N-nitroso-
N-Nitrosodiethy- lamine 55-18-5 Ethanamine, N-ethyl-N-nitroso-
N-Nitrosodimet hyl-amine 62-75-9 Methanamine, N-methyl-N-nitroso-
N-Nitrosodiphe- nylamine 86-30-6 Benzenamine, N-nitroso-N-phenyl-
N-Nitrosodipro- pylamine; Di-n-propylni trosamine 621-64-7 1-Propanamine, N-nitroso-N-propyl-
N-Nitrosom- ethylethylamine 10595-95-6 Ethanamine, N-methyl-N-nitroso-
N-Nitrosomorpholine 59-89-2 Morpholine, 4-nitroso-
N-Nitrosopiperidine 100-75-4 Piperidine, 1-nitroso-
N-Nitrosopyrrolidine 930-55-2 Pyrrolidine, 1-nitroso-
5-Nitro-o-toluidine 99-55-8 Benzenamine, 2-methyl-5-nitro-
Parathion 56-38-2 Phosphorothioic acid, O,O-diethyl-O- (4-nitrophenyl) ester
Polychlorinated biphenyls; PCBs See Note 7 1,1'-Biphenyl, chloro derivatives
Polychlorinated dibenzo-p-dioxins; PCDDs See Note 8 Dibenzo[b,e][1,4]dioxin, chloro derivatives
Polychlorinated dibenzofurans; PCDFs See Note 9 Dibenzofuran, chloro derivatives
Pentachlorobenzene 608-93-5 Benzene, pentachloro-
Pentachloroethane 76-01-7 Ethane, pentachloro-
Pentachloronitro ben-zene 82-68-8 Benzene, pentachloronitro-
Pentachlorophenol 87-86-5 Phenol, pentachloro-
Phenacetin 62-44-2 Acetamide, N-(4-ethoxyphenyl)
Phenanthrene 85-01-8 Phenanthrene
Phenol 108-95-2 Phenol
p-Phenylenediamine 106-50-3 1,4-Benzenediamine
Phorate 298-02-2 Phosphorodithioic acid, O,O-diethyl S- [(ethylthio)methyl] ester
2-Picoline 109-06-8 Pyridine, 2-methyl-
Pronamide 23950-58-5 Benzamide, 3,5-dichloro-N- (1,1-dimethyl-2- propynyl)-
Propionitrile; Ethyl cyanide 107-12-0 Propanenitrile
Pyrene 129-00-0 Pyrene
Pyridine 110-86-1 Pyridine
Safrole 94-59-7 1,3-Benzodioxole, 5-(2-propenyl)-
Selenium (Total) Selenium
Silver (Total) Silver
Silvex; 2,4,5-TP 93-72-1 Propanoic acid, 2-(2,4,5-trichloro phenoxy)-
Styrene 100-42-5 Benzene, ethenyl-
Sulfide 18496-25-8 Sulfide
2,4,5-T; 2,4,5-Trichloro- phenoxyacetic acid 93-76-5 Acetic acid, (2,4,5- trichlorophenoxy)-
2,3,7,8-TCDD; 2,3,7,8- Tetrachloro- dibenzo-p- dioxin 1746-01-6 Dibenzo[b,e][1,4] dioxin, 2,3,7,8-tetrachloro-
1,2,4,5-Tetrach loro-benzene 95-94-3 Benzene, 1,2,4,5-tetrachloro-
1,1,1,2-Tetrach loro-ethane 630-20-6 Ethane, 1,1,1,2-tetrachloro-
1,1,2,2-Tetrach loro-ethane 79-34-5 Ethane, 1,1,2,2-tetrachloro-
Tetrachloroethy lene; Perchloroethylene; Tetrachloroethene 127-18-4 Ethene, tetrachloro-
2,3,4,6-Tetrachl oro-phenol 58-90-2 Phenol, 2,3,4,6-tetrachloro-
Tetraethyl dithiopyrophos phate; Sulfotepp 3689-24-5 Thiodiphosphoric acid ([(HO) 2 P(S)] 2 O), tetraethyl ester
Thallium (Total) Thallium
Tin (Total) Tin
Toluene 108-88-3 Benzene, methyl-
o-Toluidine 95-53-4 Benzenamine, 2-methyl-
Toxaphene 8001-35-2 Toxaphene
1,2,4-Trichloro- benzene 120-82-1 Benzene, 1,2,4-trichloro-
1,1,1-Trichloro- ethane; Methylchloro- form 71-55-6 Ethane, 1,1,1-trichloro-
1,1,2-Trichloroethane 79-00-5 Ethane, 1,1,2-trichloro-
Trichloroethylene; Trichloroethene 79-01-6 Ethene, trichloro-
Trichlorofluoro- methane 75-69-4 Methane, trichlorofluoro-
2,4,5-Trichloro- phenol 95-95-4 Phenol, 2,4,5-trichloro-
2,4,6-Trichloro- phenol 88-06-2 Phenol, 2,4,6-trichloro-
1,2,3-Trichloro- propane 96-18-4 Propane, 1,2,3-trichloro-
O,O,O-Triethyl phosphorothioate 126-68-1 Phosphorothioic acid, O,O,O-triethyl ester
sym-Trinitrobenzene 99-35-4 Benzene, 1,3,5-trinitro-
Vanadium (Total) Vanadium
Vinyl acetate 108-05-4 Acetic acid, ethenyl ester
Vinyl chloride 75-01-4 Ethene, chloro-
Xylene (total) 1330-20-7 Benzene, dimethyl-
Zinc (Total) Zinc
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