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• Ambient Water QualiW Criteria volumes13 published by EPA in 1980 for the priority pollutants which contain taste and odor-based criteria for some chemicals; Aquatic Life and Wildlife • _ ality Criteria„for_Water, 1986("Gold Book")"and the Ambient Water Qualfty Criteria volumes for the priority pollutants13 (1980) published by EPA with updates for some chemicals published in 198519; Note: 4-day average,24-hour average,or chronu;criteria should be used as water quality goals whenever available to protect the surface water resource for the long term. - Qualily Criteria for Water ("Red Book")t6 published by EPA in 1976 [superseded by QMality Criteria for Water, 198E ("Gold Book")12 and the Ambient Water Quality Criteria volumes13 for the priority pollutants]; •Water Qualily Criteria 1972 ('Blue Book")"published by EPA in 1973 [superseded by Qgality Criteria for Water ("Red Book")16 • Estimated Pernassible Ambient Goals"published by EPA in 1977 as informal criteria; kW Note. These are estimated criteria and should only be used if no other crYterm are available. Agricultural Use •Water Qualily for A riculture'6 published by the Food and Agriculture Organization of the United Nations in 1985; Other-Uses- _ •Water Quality Criteria 2' written by McKee and Wolf and published by the State Water -1= - —Resources Control Boar&in 196SwWh contains criteria for human-health and welfare, x aquatic life, agricultural use,industrial use,and various other uses. A list of these water quality goals may be found in the staff report A Compiktidn of Water Quality Coals: To protect the maximum number of beneficial uses, the most restrictive(lowest), applicable,and justifiable water quality goals should be selected for deriving Designated_ 'A � — - -- Levels. Due to the rapidly dhanging data base on the health and environmental effects of chemicals, caution should be observed in selecting among the various water quality criteria and standards to be sure that the most recent information is utilized. The original literature �.i should be consulted whenever possible to determine the applicability and limitations of the _ criteria and standards being selected. Other government agencies,such as the California Department of Health Services,the California Department of Fish and Game,and the U.S. Environmental Protection Agency may be consulted for up-to-the-minute information 1, It is common practice to rely on Primary MCLS as "enforceable standards". However,care should be taken in the application of Primary MCLS to the protection of sources of drinking Designated Level Methodology page 27