esm223_02_Reference__WQ_Goals_XL__footnotes_2007

esm223_02_Reference__WQ_Goals_XL__footnotes_2007 - F O O T...

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F O O T N O T E S Water Quality Goals - August 2007 Footnotes Page 1 (7-day) For exposure of 7 days or less. (21) Based on limited evidence. (10-day) For exposure of 10 days or less. (22) For chlorinated benzenes. (24-hr) For exposure of 24 hours or less. (23) Toxicity to a fish species exposed for 7.5 days. (A) Class A: Known human carcinogen; sufficient epidemiologic evidence in humans. Carcinogenic to humans (24) For dichlorobenzenes. (U.S. Environmental Protection Agency, 1986 Guidelines for Carcinogen Risk Assessment). (25) 1983 Suggested-No-Adverse-Response Level; to be reviewed in the future. (B) Class B: Probable human carcinogen. Likely to be carcinogenic to humans (U.S. Environmental Protection (26) From Reference 8. Agency, 1986 Guidelines for Carcinogen Risk Assessment). (27) For dichloroethylenes. (B1) Class B1: Probable human carcinogen; limited epidemiologic evidence in humans. Likely to be carcinogenic (28) For dichloropropanes. to humans (U.S. Environmental Protection Agency, 1986 Guidelines for Carcinogen Risk Assessment). (29) For dichloropropenes. (B2) (30) This limit has a range of values between the first and second numbers shown. Likely to be carcinogenic to humans (U.S. Environmental Protection Agency, 1986 Guidelines for Carcinogen (31) Adverse behavioral effects occur to one species. Risk Assessment). (32) First value is an upper bound estimate, while second value is a central tendency estimate of risk. (C) Class C: Possible human carcinogen; limited evidence from animal studies; no human data. Suggestive (33) For sum of acenaphthylene, anthracene, benz(a)anthracene, benzo(b)fluoranthene, benzo(k)fluoranthene, evidence of carcinogenic potential (U.S. Environmental Protection Agency, 1986 Guidelines for Carcinogen benzo(g,h,i)perylene, benzo(a)pyrene, chrysene, dibenz(a,h)anthracene, fluorene, indeno(1,2,3-c,d)pyrene, Risk Assessment). phenanthrene, and pyrene. (D) Class D: Not classifiable as to human carcinogenicity; no data or inadequate evidence. Inadequate (34) Flavor impairment in a fish species occurs. information to assess carcinogenic potential (U.S. Environmental Protection Agency, 1986 Guidelines for (35) Mortality to early life stages of a fish species occurs. Carcinogen Risk Assessment). (36) Based on analytical quantitation limit available at the time the limit was established. Adverse water quality (E) Class E: Evidence of non-carcinogenicity for humans. Not likely to be carcinogenic to humans (U.S. impacts may occur at lower concentrations. Environmental Protection Agency, 1986 Guidelines for Carcinogen Risk Assessment). (37) For mononitrophenols. (H) Carcinogenic to humans (U.S. Environmental Protection Agency, 2005 Guidelines for Carcinogen Risk (38) Toxicity to algae occurs. Assessment).
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This note was uploaded on 08/06/2008 for the course ESM 235 taught by Professor Dunne during the Winter '08 term at UCSB.

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esm223_02_Reference__WQ_Goals_XL__footnotes_2007 - F O O T...

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