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FACT SHEET ORDER NO. 50-031 -10- <br /> ATTACHMENT C <br /> CITY OF LODI <br /> WHITE SLOUGH WATER POLLUTION CONTROL PLANT <br /> SAN JOAQUIN COUNTY <br /> limitation for zinc has been included in this Order based on the Basin Plan objective, with no <br /> mixing zone designated. The Discharger is not currently capable of meeting this limit. Full <br /> compliance with the zinc limitation is not required by this Order until 1 May 2004. <br /> Bis(2-ethylhexyl) phthalate (DEEP): DEHP has a low solubility in water. It is commonly found in <br /> -plastic products and containers, hospital and laundry discharges, and can also be found in adhesives, <br /> paper, pesticides, and flexible plastic pipes. The National Toxics Rule receiving water limitation <br /> for DEHP is 1.8 µg/l (30-day average, chronic criteria) for surface waters where the designated <br /> beneficial use is drinking water, and 5.9 µg/1 (30-day average, chronic criteria) where drinking <br /> water is not a designated beneficial use. The California Department of Health Services Maximum <br /> Contaminant Level for DEHP is 4 µg/l. Effluent sampling results showed that DEEP has been <br /> detected in the effluent at significant concentrations above the limitations two times since the <br /> previous permit renewal, but not in the last four years. No effluent limitation for DEHP has been <br /> included in this Order. However, the Discharger is required to monitor for DEHP. <br /> j) Pesticides and Unknown Toxicity <br /> The Sacramento-San Joaquin Delta has been listed as an impaired water body pursuant to Section <br /> 303(d) of the Clean Water Act because of: (1) diazinon and chlorpyrifos (organophoshate <br /> pesticides), (2) aldrin, dieldrin, chlordane, endrin, heptachlor, heptachlor epoxide, <br /> hexachlorocyclohexane (including lindane), endosulfan and toxaphene (chlorinated hydrocarbon <br /> pes#icides), (3) DDT, and (4) unknown toxicity. The Basin Plan requires that; no individual <br /> pesticides shall be present in concentrations that adversely affect beneficial uses; discharges shall <br /> not result in pesticide concentrations in bottom sediments or aquatic life that adversely affects <br /> beneficial uses; total chlorinated hydrocarbon pesticide concentrations shall not be present in the <br /> water column at detectable concentrations and pesticide concentrations shall not exceed those <br /> allowable by applicable antidegradation policies. The Basin Plan's requirement that persistent <br /> chlorinated hydrocarbon pesticides shall not be present in the water column in detectable <br /> concentrations is the most stringent criteria for the regulation of the detected persistent <br /> organochlorine pesticides <br /> Analytical results for pesticides on the 303(d) list other than diazinon and chlorpyrifos are <br /> summarized below: <br /> Wastewater Treatment Plant Effluent Sampling Results (µg/1) <br /> Date aldrin chlordane dieldrin endrin heptachlor heptachlor epoxide lindane endosulfan toxaphene DDT <br /> 12-11-92 <0.01 <0.05 <0.05 <0.05 <0.02 <0.01 0.01 <0.05 <0.05 <0.02 <br /> 01-31-93 --- --- --- --- --- --- <0.2 --- -- --- <br /> 03-14-93 <0.01 <0.05 <0.05 <0.05 <0.02 <0.01 0.051* <0.05 <0.05 <0.02 <br /> 05-23-93 --- --- --- --- --- --- 0.025 --- -- --- <br /> 09-27-93 <0.01 <0.05 <0.05 <0.05 <0.02 <0.01 <0.91 <0.05 <0.05 <0.02 <br /> 05-25-94 <0.006 <0.05 <0.007 <0.009 <0.007 <0.007 <0.007 <0.007 <0.50 <0.02 <br /> 08-11-94 <0.006 <0.05 <0.007 <0.009 <0.007 <0.007 <0.007 <0.007 <0.50 <0.02 <br />