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sSentr.By: RWOCB; 2553439; Jul-13.-.00 11 :20AM; Page 2 �. <br /> Water Quality Goals Database California Regional Water Quality Control Board,Central Valley Region <br /> Water Quality Numerical Limits for <br /> 1,2-Dichloroethane <br /> Organic Chemical <br /> Synonyms: 1,2-DCA <br /> Ethylene dichloride <br /> Freon 150 <br /> Concentration <br /> CAS Number: 107-06-2 <br /> (uglL unless noted) <br /> Drinking Water Standards — Maximum Contaminant Levels (MCLs) <br /> California Department of Health Services <br /> Primary MCL (health-based + technology & economics) 0.5 <br /> Secondary MCL (taste & odor or welfare-based) <br /> U.S. Environmental Protection Agency (USEPA) <br /> Primary MCL (health-based r technology 8,economics) 5 <br /> Secondary_.MCL (taste & odor or welfare-based) .. <br /> MCL Goal (level which causes no adverse health effect) zero <br /> California Public Health Goal or PHG (Cal/EPA, OEHHA) 0.4 <br /> California State Action Levels (Department of Health Services) <br /> � Toxici .-based - - <br /> Taste & Odor.based - <br /> Drinking Water Health Advisories or Suggested No-Adverse-Response Levels for non-cancer effects <br /> USEPA IRIS Reference Dose RfD as a drinking water level".., <br /> U, S. Environmental Protection Agency 700 / 2600 7- r 7 <br /> National Academy of Sciences <br /> One-ina-Million Incremental Cancer Risk Estimates for Drinking Water <br /> Cal/EPA Cancer Potency Factoras a drinking water level" 0-74 <br /> USEPA Integrated Risk Information_Sy (IRIS) 0.45.21 <br /> USEPA Health Advisories 0.4 (62) <br /> National Academof Sciences 0.71 <br /> y <br /> California Proposition 65 Regulatory Level as a drinking wafer level"" _ 5 # <br /> Taste & Odor Threshold <br /> 7000 126 <br /> Agricultural,Water Quality Goals (Food & Ag, Org. of United Nations_ — <br /> California Inland Surface Waters -- California Toxics Rule Criteria (USEPA) <br /> Human Health Protection (30-day average) <br /> Sources of Drinking Water water + fish consumption) 0.38. 11( 3,143) <br /> Other Waters (fish consumption only) 99 (_.13143, ) <br /> 1 <br /> Freshwater Aquatic Life Protection <br /> Continuous Concentration (4-day Average) <br /> Maximum Concentraiton 1-hour Average) <br /> Maximum InstantaneousZ— _ <br /> California Enclosed Bays & Estuaries --California Toxics Rule Criteria (USEPA) <br /> Human Health Protection30-day average; fish consu n tip on only) 99 ALU <br /> Saltwater Aquatic Life Protection <br /> Continuous ConcentratiqLj±dpay Average).,_ — <br /> Maximum Concentraiton . 1-hour Average) -- <br /> Maximum Instantaneous <br /> Page 1 of 2 Numbers and letters in pareatheses indicate footnotes. June 2000 <br />