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Water Quality Goals Database- Water Quality Goals for Naphthalene . Page 3 of 4 <br /> Continuous Concentration <br /> (4-day Average) <br /> 24-hour Avera e <br /> Maximum Concentration <br /> 1-hour Average) <br /> Maximum <br /> Instantaneous <br /> Toxicity Information <br /> Lowest Observed Effect Level <br /> Acute 2300 <br /> Chronic 620 <br /> Other <br /> Saltwater Aquatic Life Protection <br /> Recommended Criteria <br /> Continuous Concentration <br /> (4-day Average) <br /> 24-hour Average <br /> Maximum Concentration <br /> 1-hour Average) <br /> Maximum Instantaneous <br /> Toxicity Information <br /> Lowest Observed Effect Level <br /> Acute 2350 <br /> Chronic <br /> Other <br /> Threshold Threshold Units Foot Foot Adopti <br /> Source & References 1 2 if not Notes note1 note2 Dats <br /> (ug/L) (ug/L) ug/L <br /> Notes: <br /> Assumes 70 kg body weight, 2 liters/day water consumption, and 20%relative source contribution from dr <br /> An additional uncertainty factor of 10 is used for Class C carcinogens. <br /> * Assumes 70 kg body weight and 2 liters/day water consumption. <br /> *** Regulatory dose level divided by 2 liters/day water consumption. <br /> # Carcinogen/based on cancer risk <br /> R Reproductive toxin/based on reproductive toxicity. <br /> CA First threshold or range is recommended to implement promulgated Criteria to protect Aquatic life. <br /> CH First threshold or range is recommended to implement promulgated Criteria to protect Human health. <br /> CC First threshold or range is recommended to implement the Chemical Constituents objective. <br /> CT First threshold or range is recommended to implement the Chemical Constituents and the Tastes&Odors <br /> TA First threshold or range is recommended to implement the Toxicity objective to protect Aquatic life. <br /> TH First threshold or range is recommended to implement the Toxicity objective to protect Human health. <br /> TO First threshold or range is recommended to implement the Tastes and Ordors objectives. <br /> G Limiting threshold applies to Groundwater only. <br /> IS Limiting threshold applies to Inland Surface water only. <br /> G&IS Limiting threshold applies to both Groundwater and Inland Surface water. <br /> EW Limiting threshold applies to Estuarine Water only. <br /> MW Limiting threshold applies to Marine Water only. <br /> Footnotes <br /> 191 First number is the Notification Level, above which local government notification is required and customer <br /> recommended. Second number is the Response Level, at which the drinking water source is recommends <br /> out of service. <br /> 166 Value modified using more recent information in USEPA Integrated Risk Information System (IRIS). See F <br /> 68 Draft/tentative/provisional; applies only to second value if two separate values are listed; applies to rant <br /> values is listed. <br /> 197 Cancer Class I based on oral exposure data; Cancer Class L based on inhalation exposure data. <br /> I Inadequate information to assess carcinogenic potential (U.S. Environmental Protection Agency, 2005 Gu <br /> Carcinogen Risk Assessment). <br /> 188 Carcinogen; limit based on cancer risk. <br /> http://www.waterboards.ca.gov:8080/WaterQualityGoalsfWQ viewjsp?backUrl=naphthal... 9/18/2013 <br />