UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, D.C, 20460 MAR 23 1995 9360.1-02A MEMORANDUM OFFICE OF SOLID WASTE AND EMERGENCY RESPONSE TO: SUBJECT: Update #2 to Removal Action Levels FROM: .John E. Riley, Acting Directo Emergency Response Division TO: Removal Managers, Regions 1-10 My office has completed an updated table of numeric action levels for contaminated drinking water sites. Thi.j table was originally published as an attachment (dated May 1993) to Direc- tive 9360.1-02 (October 25, 1993). The directive described the new methodology used by OERR to calculate removal action levels (RALs) in drinking water. Using the methodology established in the 1993 directive, we have re-evaluated the table based on the most recent Office of Water's Drinking Water Regulations and Health Advisories (Novem- ber 1994), IRIS (March 8, 1995), and HEAST (9200.6-303(94-1) and supplement 9200.6-3 03(94-2)). As a result of changes to the source materials, we revised the RALs- for three chemicals: chloral hydrate, dimethyl phthal- ate, and metolachlor. The DWEL and RAL for dimethyl phthalate have been removed because the RfD/RfC Work Group last year decided that the oral RfD, which was reported in IRIS and HEAST, is not verifiable. No new chemicals have been added to the table at this time. This table represents the latest available information on these chemicals, and supersedes Update #1, which was issued on September 22, 1994. We have attached copies of the table in both hard copy and electronic (WordPerfect 5.1) forms. Please ensure that copies of this table are circulated promptly to all Regional staff involved with removal actions. If you have any questions on this updated table, please contact Scott Maid at 703-603-8723. Attachments ^,<9 Recycled/Recyclable Printed with Soy/Cariota Ink on paper that ]<~7 contains at least 50% recycled fiber ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES Tables Emergency Response Division Office of Solid Waste and Emergency Response U.S. Environmental Protection Agency Washington, DC 20460 March 1995 ------- Table Acronyms CAS # Chemical Abstract Number DWEL Longer-term HA (Child) MCL MCLG MFL Treat. Tech. URTH-STAR Drinking Water Equivalent Level (calculated by multiplying the oral RfD by 70 kilograms (adult body weight) and dividing by the average volume of water (2 liters) consumed per day) Drinking Water Health Advisory for 10 kg child consuming 1 liter water per day for up to 7 years Maximum Contaminant Level (National Primary Drinking Water Standard) Maximum Contaminant Level Goal Million Fibers per Liter MCL is based on the capability of the treatment technology Draft Short-term Risk Level (STAR) recommended for an Unreasonable Risk to Health (URTH) under Safe Drinking Water Act ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES PRIMARY DRINKING WATER STANDARDS AND HEALTH ADVISORIES March 1995 Chemical ORGANICS CAS # Cancer Risk Standards and Health Advisories Superfund Removal Action Level (Mg/L) Cancer Group 10-4 Cancer Risk (Mg/L) DWEL (Mg/L) Longer- term HA (Child) (Mg/L) MCL / MCLG (Mg/L) URTH -STAR- Level (Mg/L) Acenaphthene 83329 — — 2,100 — — — 2,100 Acetone 67641 D — 3,500a . ' —' ¦ ¦ 3,500 Acifluorfen (Tackle) 62476599 B2 100 400 100 —/O — 100 Acrylamide (2-Propenamide) 79061 B2 1 7 20 Treat Tech. / 0 1 ¦ 1 Acrylonitrile 107131 B1 6 — — —/O — 6 Adipates (Diethylhexyl) 103231 C 3,000 20,000 20,000 400 / 400 Mr 4,000 Alachlor 15972608 B2 40 400 — 2 / 0 40 40 Aldicarb (Temik) 116063 D • 35 7/7 35 Aldicarb sulfone 1646884 D 35 - - 7 / 7 — 35 Aldicarb sulfoxide — D ¦ —-i v. 35 7/7 — 35 Aldrin 309002 B2 0.2 1 0.3 — — 0.2 Ametyrn 834128 D — 300 900 — 300 Ammonium sulfamate 7773060 D — 8,000 20,000 — —> 8,000 Anthracene 120127 D 11,000 ¦-&?' ^ 11,000 Atrazine 1912249 C — 200 50 3 / 3 30 30 Baygon 114261 C 100 40 40 Bentazon 25057890 D 90 300 — / 20 90 Benz(a)anthracene 56553 B2 0.1/0 0.1 Benzene 71432 A 100 — — 5/0 100 100 Benzo(a)pyrene 50328 B2 0.2/0 — 0.2 Benzo(b)fluoranthene 205992 B2 — — 0.2/0 — 0.2 Benzo(k)fluoranthene 207089 B2 0.2/0 0.2 bis-2-Chloroisopropyl ether 108601 D •— 1,000 4,000 — — 1,000 Bromacil 314409 C ¦ . -_T' * 5,000 3,000 ; i: i;":' 3,000 Bromochloromethane 74975 Da -— 500 1,000 — 500 Bromodichloromethane 75274 B2 60 700 4,000 100 (80b) / 0 100 Bromofonn 75252 B2 400 700 2,000 100 (80b) / 0 — 400 ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES PRIMARY DRINKING WATER STANDARDS AND HEALTH ADVISORIES March 1995 2 Chemical ORGANICS CAS# Cancer Risk Standards and Health Advisories Superfund Removal Action Level (Mg/L) Cancer Group 10"4 Cancer Risk (Mg/L) DWEL (Mg/L) Longer- term HA (Child) (Hg/L) MCL / MCLG (Mg/L) URTH -STAR- Level (Mg/L) Bromomethane (Methyl bromide) 74839 D — 40 100 'V' " 40 Butanone (2-) (see Methyl ethyl ketone) Butyl benzyl phthalate 85687 C — 6,000 100/0 6,000 Butylate 2008415 D — 2,000 1,000 — — 1,000 Carbaryl 63252 D 4,000 1,000 1,000 Carbofuran 1563662 E — 200 50 40/40 50 50 Carbon tetrachloride 56235 B2 30 30 70 5/0 30 30 Carboxin 5234684 D — 4,000 1,000 — . — 1,000 Chloral hydrate (Trichloroacetaldehyde 302170 C : —- : ' 60 200 60c / 40 60 monohydrate) Chloramben 133904 D — 500 200 — — 200 Chlordane 57749 B2 3 2 2/0 2 2 Chlorobenzene (see Monochlorobenzene) Chlorodibromomethane (Dibromochloro- 124481 C 700 2,000 100 (80b) / 60 600 methane) Chloroform (Trichloromethane) 67663 B2 600 400 100 100 (80b) / 0 — 100 Chloromethane (Methyl chloride) 74873 C 100 400 100 Chlorophenol (2-) 95578 D — 200 50 50 Chlorothalonil 1897456 B2 150 500 200 150 Chlorotoluene, o- 95498 D — 700 2,000 — — ¦ 700 Chlorotoluene, p- 106434 D 700 2,000 700 Chlorpyrifos 2921882 D — 100 30 — — 30 Chrysene 218019 B2 0.2/0 0.2 Cumene (see Isopropylbenzene) Cyanazine 21725462 C —¦ 70 20 — / 1 ¥:-v. 20 2,4-D (2,4-Dichlorophenoxyacetic acid) 94757 D — 400 100 70 / 70 100 100 Dacthal (DCPA) 1861321 D 20(000 5,000 . .¦ — . — 5,000 Dalapon 75990 D — 900 300 200 / 200 — 300 ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES PRIMARY DRINKING WATER STANDARDS AND HEALTH ADVISORIES March 1995 3 Chemical Cancer Risk Standards and Health Advisories Superfund ORGANICS CAS # 10"4 Longer- URTH Removal Cancer Cancer DWEL term HA MCL / MCLG -STAR- Action Group Risk (Child) Level Level (pg/L) (Mg/L) (Mg/L) (Mg/L) (Mg/L) (Mg/L) Di[2-ethylhexyl]adipate 103231 C 3,000 20,000 20,000 400 / 400 4,000 Diazinon 333415 E — 3 5 — — 3 Dibenzo[a,h]anthracene 53703 B2 —• ¦¦¦¦. 0.3/0 0.3 Dibromoacetonitrile 3252435 C — 800 2,000 — — 800 Dibromochloromethane (see Chlorodibromomethane) Dibromochloropropane (DBCP) 96128 B2 3 — — 0.2/0 3 3 Dibromomethane (Methylene Bromide) 74953 D — : — : — Dibutyl phthalate (Di-n-butyl phthalate) 84742 D — 4,000 — — — 4,000 Dicamba 1918009 D 1,000 300 300 Dichloroacetic acid 79436 B2 100 1,000 60° /0 100 Dichloroacetonitrile 3018120 C 300 800 300 Dichlorobenzene -o (1,2-) 95501 D 3,000 9,000 600 / 600 3,000 3,000 Dichlorobenzene -m (1,3-) 541731 D 3,000 9,000 600/600 3,000 Dichlorobenzene -p (1,4-) 106467 C 4,000 10,000 75/75 750 750 Dichlorodifluoromethane (Freon-12) 75718 D 5,000 9,000 — 5,000 Dichloroethane (1,1-) 75343 Ca 3,500a — — 3,500 Dichloroethane (1,2-) (Ethylene 107062 B2 40 ¦ ¦ ; :¦ . 700 5/0 40 40 dichloride) Dichloroethylene (1,1-) 75354 C — 400 1,000 7 / 7 70 70 Dichloroethylene (cis- 1,2-) 156592 D — 400 3,000 70/70 400 400 Dichloroethylene (trans- 1,2-) 156605 D 600 2,000 100 / 100 600 600 Dichloromethane (Methylene chloride) 75092 B2 500 2,000 -¦ — 5/0 500 Dichlorophenol (2,4-) 120832 D — 100 30 30 Dichloropropane (1,2-) 78875 B2a — 5/0 — 5 Dichloropropene (1,3-) (cis and trans) 542756 B2 20 10 30 — 10 — 10 Dieldrin 60571 B2 0.2 2 0.5 0.2 Diethyl phthalate 84662 D — 30,000 — 30,000 Diethylhexyl (see Adipates) ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES PRIMARY DRINKING WATER STANDARDS AND HEALTH ADVISORIES March 1995 4 Chemical Cancer Risk Standards and Health Advisories Superfund ORGANICS CAS # 10"4 Longer- URTH Removal Cancer Cancer DVVEL term HA MCL / MCLG -STAR- Action Group Risk (Child) Level Level (Mg/L) (Mg/L) (Mg/L) (Mg/L) (Mg/L) (Mg/L) Diethylhexyl phthalate 117817 B2 300 700 — ¦ 6/0 — 300 Dimethrin 70382 D — 10,000 10,000 — — 10,000 Dimethyl methylphosphonate 756796 C 700 7,000 2,000 — — 2,000 Dimethyl phthalate 131113 D :':' r-y. . : —v-- —- DIMP (Diisopropylmethylphosphonate) 1445756 D — 3,000 8,000 — — 3,000 Dinitrobenzene (1,3-) 99650 D — 5 40 — ¦ ¦ 5 Dinitrotoluene (2,4-) 121142 — — 100 300 — — Dinitrotoluene (2,6-) 25321146 — —_ 40 400 ' : — yG-f: Dinitrotoluene, tgd (2,6- & 2,4-) — B2 5 — — 5 Dinoseb 88857 D ¦—, ' 40 10 7/7 10 Dioxane p- (1,4-) 123911 B2 700 — — — — 700 Dioxin (see 2,3,7,8-TCDD) Diphenamid 957517 D — 1,000 300 — — 300 Diphenylamine 122394 D 1,000 300 300 Diquat 85007 D — 80 — 20 120 — 80 Disulfoton 298044 E 1 3 1 Dithiane (1,4-) 505293 D — 400 400 — — 400 Diuron 330541 D — 70 300 70 Endothall 145733 D — 700 200 100/ 100 — 200 Endrin 72208 D 10 3 2/2 — 3 Epichlorohydrin 106898 B2 400 70 70 Treat. Tech. / 0 70 70 Ethylbenzene 100414 D — 3,000 1,000 700 / 700 1,000 1,000 Ethylene dibromide (1,2-) (EDB) 106934 B2 0.04 — — 0.05 / 0 0.05 0.05 Ethylene dichloride (see 1,2-Dichloroethane) Ethylene glycol 107211 D — 40,000 6,000 — — 6,000 Ethyl ether 60297 ¦— 7,000a — 7,000 Ethylene thiourea (ETU) 96457 B2 30 3 100 — 3 ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES PRIMARY DRINKING WATER STANDARDS AND HEALTH ADVISORIES March 1995 5 Chemical ORGANICS CAS# Cancer Risk Standards and Health Advisories Superfund Removal Action Level (Mg/L) Cancer Group 10'4 Cancer Risk (Mg/L) DWEL (Mg/L) Longer- term HA (Child) (Mg/L) MCL/MCLG (Mg/L) URTH -STAR- Level (Mg/L) Fenamiphos 22224926 D — 9 5 — 5 Fluometuron 2164172 D — 400 2,000 — 400 Fluorene 86737 D — 1,400 — . 1,400 Fluorotrichloromethane (Freon-l I) 75694 D ¦— 10,000 3,000 —¦ — 3,000 Fonofos 944229 D — 70 20 20 Formaldehyde 50000 B1 — 5,000 5,000 — — 5,000 Freon-l 1 (see Fluorotrichloromethane) Freon-l2 (see Dichlorodifluoromethane) Freon 113 (1,1,2-Trichloro- 76131 — — l,100,000a — ¦ '¦ 1,100,000 1,2,2-trifluoroethane) Glyphosate 1071836 E — 4,000 1,000 700 / 700 1,000 Heptachlor 76448 B2 0.8 20 5 0.4/0 0.8 0.8 Heptachlor epoxide 1024573 B2 0.4 0.4 0.1 0.2 / 0 0.4e 0.4 Hexachlorobenzene 118741 B2 2 30 50 1/0 2 Hexachlorobutadiene 87683 C — 70 100 — / 1 — 70 Hexachlorocyclohexane, gamma (see Lindane) Hexachlorocyclopentadiene 77474 D — 200 — 50 / 50 — 200 Hexachloroethane 67721 C —; 40 100 40 Hexane (n-) 110543 D — — 4,000 — — 4,000 Hexazinone 51235042 D —i 1,000 3,000 — — 1,000 HMX (Octahydro 1,3.5,7-tetranitro- 2691410 D — 2,000 5,000 — — 2,000 1,3,5,7-tetrazocine) Indeno[l,2,3-c,d]pyrene 193395 B2 — . J.:';;;: 0.4/0 0.4 Isophorone 78591 C 4,000 7,000 15,000 — — 7,000 Isopropyl methylphosphonate 6838933 D —* 4,000 30,000 — — 4,000 Isopropylbenzene (Cumene) 98828 — — l,400a — — — 1,400 Kerb (see Pronamide) Lindane (Hexachlorocyclohexane, gamma) 58899 C — 10 30 0.2 / 0.2 2 2 ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES PRIMARY DRINKING WATER STANDARDS AND HEALTH ADVISORIES March 1995 6 Chemical Cancer Risk Standards and Health Advisories Superfund ORGANICS CAS# io-4 Longer- URTH Removal Cancer Cancer DWEL term HA MCL / MCLG -STAR- Action Group Risk (Child) Level Level (Hg/L) (pg/L) (pg/L) (pg/L) (pg/L) (Pg/L) Malathion 121755 D — 800 200 200 Maleic hydrazide 123331 D — 20,000 5,000 — — 5,000 MCPA (4-Chloro-2-methylphenoxy)-acetic 94746 E .—... 50 100 50 acid) Methomyl 16752775 D — 900 300 — 300 Methoxychlor 72435 D 200 50 40/40 50 50 Methyl bromide (see Bromomethane) Methyl chloride (see Chloromethane) Methyl ethyl ketone (2-Butanone) 78933 Da — 21,000" — — — 21,000 Methyl parathion 298000 D — 9 30 — 9 Methyl tert butyl ether 1634044 D — 200 500 — — 200 Methylene bromide (see Dibromomethane) Methylene chloride (see Dichloromethane) Metolachlor 51218452 C 3,500 1,000 1,000 Metribuzin 21087649 D — 900 300 — 300 Monochloroacetic acid (Chloroacetic 79118 : . ' . 70a •: '/V::-: 70 acid) Monochlorobenzene (Chlorobenzene) 108907 D 700 2,000 100/ 100 700 700 Naphthalene 91203 D ;; 100 400 100 Nitroguanidine 556887 D — 4,000 10,000 — 4,000 Nitrophenols p- 25154556 D - 300 800 300 Octachlorocamphene (see Toxaphene) Oxamyl 23135220 E 900 200 200/200 200 Paraquat 1910425 E — 200 50 — — 50 Pentachloronitrobenzene (PCNB) 82688 Ca — O O ...7. : _ 100 Pentachlorophenol 87865 B2 30 1,000 300 1/0 30 30 Perchloroethylene (see Tetrachloroethylene) Phenol 108952 D — 20,000 6,000 — — 6,000 ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES PRIMARY DRINKING WATER STANDARDS AND HEALTH ADVISORIES March 1995 Chemical ORGANICS CAS # Cancer Risk Standards and Health Advisories Superfund Removal Action Level (pg/L) Cancer Group io-4 Cancer Risk (Pg/L) DWEL (Hg/L) Longer- term HA (Child) (pg/L) MCL / MCLG (pg/L) URTH -STAR- Level (fig/L) Picloram 1918021 D — 2,000 700 500/500 — 700 Polychlorinated biphenyls (PCBs) 1336363 B2 0.5 — — 0.5/0 0.5 0.5 Prometon 1610180 D 500 200 200 Pronamide (Kerb) 23950585 C — 3,000 800 — — 800 Propachlor 1918167 D — 500 100 — 100 Propazine 139402 C — 700 500 — — 500 Propham 122429 D — 600 5,000 — 600 Pyrene 129000 D — 1,100 — — — 1,100 RDX (Hexahydro-1,3.5-trinitro-1,3,5-triazine) 121824 C 30 100 100 — '7: 100 Simazine 122349 C — 200 70 4/4 — 40 Styrene 100425 C . —r . 7,000 2,000 100/100 1,000 1,000 T (2,4,5-) 93765 D 350 800 — — 350 Tackle (see Acifluorfen) TCDD (2,3,7,8-) (v) (Dioxin) 1746016 B2 0.00002 0.00004 0.00001 0.00003 / 0 — 0.00003 Tebuthiuron 34014181 D 2,000 700 700 Temik (see Aldicarb) Terbacil 5902512 : ^ E 400 300 — 300 Terbufos 13071799 D 5 1 — — 1 Tetrachloroethane (1,1,1,2-) 630206 C 100 1,000 900 900 Tetrachloroethane (1,1,2,2-) 79345 Ca 20a — — — — 2 Tetrachloroethylene (Perchloroethylene) 127184 B21 70 500 1,000 5/0 70 70 Toluene 108883 D — 7,000 2,000 1,000 / 1,000 — 2,000 Toxaphene (Octachlorocamphene) 8001352 B2 3 3 3/0 3 3 TP (2,4,5-) (2(2,4,5-Trichlorophenoxy- 93721 D — 300 70 50/50 70 70 propionic acid) Trichloroacetaldehyde (Chloral) see Chloral hydrate (hydrated form of trichloroacetaldehyde) Trichloroacetic acid 76039 C — 4,000 4,000 60° / 300 — 3,000 Trichiorobenzene (1,2,4-) 120821 D — 400 100 70/70 — 100 ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES PRIMARY DRINKING WATER STANDARDS AND HEALTH ADVISORIES March 1995 8 Chemical ORGANICS CAS# Cancer Risk Standards and Health Advisories Superfund Removal Action Level (Mg/L) Canrer Group 10"4 Cancer Risk (Mg/L) DVVEL (Mg/L) Longer- term HA (Child) (Mg/L) MCL / MCLG (Mg/L) URTH -STAR- Level (Mg/L) Trichlorobenzene (1,3,5-) 108703 D — 200 600 — — 200 Trichloroethane (1,1,1-) 71556 D — 1,000 40,000 200/200 1,000 1,000 Trichloroethane (1,1,2-) 79005 C — 100 400 5 / 3 — 30 Trichloroethylene (Trichloroethene) 79016 B2 300 300 ,v" 5/0 300 300 Trichloromethane (see Chloroform) Trichlorophenol (2,4,6-) 88062 B2 300 IlllftaS-'vv- 300 Trichlorophenoxypropionic acid (2(2,4,5-)) (see 2,4,5-TP) Trichloropropane (1,2,3-) 96184 B2 ¦ 200 : 200 l,l,2-Trichloro-l,2,2-trifluoroethane (see Freon 113) Trifluralin 1582098 .. C 500 : , 300 — 80. Trinitroglycerol 55630 — — — 5 — 5 Trinitrotoluene (2,4,6-) 118967 C 100 20 20 — 20 Vinyl chloride 75014 A 1.5 — 10 2/0 2 2 Vydate (see Oxamyl) Xylenes (mixed) 1330207 D — 60,000 40,000 10,000 / 10,000 40,000 40,000 a Based on data from IRIS or HEAST in the absence of a published U.S. EPA, Office of Water value b Total for all trihalomethanes combined cannot exceed 80 |ig/L c Total for all haloacetic acids cannot exceed 60 |ug/L d Technical Grade (tg); 2,4- and 2,6-Dinitrotoluene are unlikely to occur alone e Based on special considerations ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES PRIMARY DRINKING WATER STANDARDS AND HEALTH ADVISORIES March 1995 Chemical Cancer Risk Standards and Health Advisories Superfund INORGANICS CAS# 10"4 Longer- URTH Removal Cancer Cancer DWEL term HA MCL / MCLG -STAR- Action Group Risk (Child) Level Level (Mg/L) (Mg/L) (Mg/L) (Mg/L) 3 (Mg/L) (Mg/L) Ammonia 7664417 D — — — — — 34,OOOa (taste) Antimony 7440360 D — 10 10 6/6 10 Arsenic 7440382 A 2 — — 50/ — — 50 Asbestos fibers >10 |itn 1332214 A 700 MFL 7 MFL / 7 MFL 70 MFL 70 MFLb Barium 7440393 D — 2,000 — 2,000 / 2,000 — 2,000 Beryllium 7440417 B2 0.8 200 4,000 4/4 1 Boron 7440428 D — 3,000 900 — — 900 Bromate 15541454 ¦¦¦ — 10/0 10 Cadmium 7440439 D — 20 5 5 / 5 5 5 Chloramines (measured free chlorine) 10599903 Da — 3,300 1,000 4,000 / 4,000 4,000 Chlorine 7782505 D — 3,500 — 4,000 / 4,000 — 4,000 Chlorine dioxide 10049044 D 350 — 800 / 300 ifc;' 800 Chlorite 7758192 D — 100 — 1,000 / 80 — 1000 Chromium III (see Chromium total) 16065831 Chromium VI (see Chromium total) 18540299 Chromium (total) — D 200 200 100 / 100 200 200 Copper 7440508 D — — — Treat. T. / 1,300 1,300 1,300 Cyanide 57125 D : V , 800 200 200 / 200 200 Fluoride 16984488 — — 4,200 — 4,000/4,000 5,000° 5,000 Hypochlorite 7681529 — . - — — / 4,000 yiiiiiaiig; — Hypochlorous acid 7790923 — — — — — / 4,000 — — Lead at tap 7439921 B2 Treat. Tech. / 0 30c 30 Manganese 7439965 Da — 200 — — / — — 200 Mercury 7439976 D 10 ¦ ' ¦rV~. 2/2 10 10 Molybdenum 7439987 D — 200 10 — — 10 Nickel 7440020 D 600 500 100/ 100 500 Nitrate 14797558 — — 56,000 — 10,000 / 10,000 10,000 10,000 ------- NUMERIC REMOVAL ACTION LEVELS FOR CONTAMINATED DRINKING WATER SITES PRIMARY DRINKING WATER STANDARDS AND HEALTH ADVISORIES March 1995 Chemical INORGANICS CAS# Cancer Risk Standards and Health Advisories Superfund Removal Action Level (Mg/L) Cancer Group io-4 Cancer Risk (Mg/L) DWEL (Mg/L) Longer- term HA (Child) (Mg/L) MCL / MCLG (Mg/L) URTH -STAR- Level (Mg/L) Nitrite 14797650 — — 5,600 —' ' 1,000/ 1,000 1 000 1,000 Nitrate+Nitrite — — — — — 10,000 / 10,000 10,000 10,000 Selenium 7782492 — 200 50/50 200 200 Silver 7440224 D — 200 200 — — *u O O Strontium 7440246 D ¦ ¦ :. 90,000 25,000 — 25,000 Sulfate 7757826 — — — — — 250,000 (aesthetics) Thallium 7440280 — . —:: . . 2 7 2/0.5 — 2 Vanadium 7440622 D — 250a — — — 250 White phosphorus 772314 D — 0.5 i ¦¦¦ 0.5 Zinc 7440666 D — 10,000 3,000 — — 3,000 Zinc chloride (measured as zinc) — D 10,000 3,000 3,000 a Based on data from IRIS or HEAST in the absence of a published U.S. EPA, Office of Water value b MFL = million fibers per liter c Based on special considerations d Secondary Maximum Contaminant Level intended to protect general public from argyuria (a cosmetic effect) over a lifetime ------- |