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WASTE DISCHARGE REQAEMENTS ORDER NO. 5-00- is -7- <br /> CITY OF LODI <br /> WHITE SLOUGH WATER POLLUTION CONTROL PLANT <br /> SAN JOAQUIN COUNTY <br /> epoxide, hexachlorocyclohexane (including lindane), endosulfan and toxaphene (chlorinated <br /> hydrocarbon pesticides), (3) DDT, and (4) unknown toxicity. The Basin Plan requires that; no <br /> individual pesticides shall be present in concentrations that adversely affect beneficial uses; <br /> discharges shall not result in pesticide concentrations in bottom sediments or aquatic life that <br /> adversely affects beneficial uses; total chlorinated hydrocarbon pesticide concentrations shall not <br /> be present in the water column at detectable concentrations and pesticide concentrations shall <br /> not exceed those allowable by applicable antidegradation policies. The Basin Plan's <br /> requirement that persistent chlorinated hydrocarbon pesticides shall not be present in the water <br /> column in detectable concentrations is the most stringent criteria for the regulation of the <br /> detected persistent organochlorine pesticides. <br /> The Discharger has not previously been required to complete effluent analyses for diazinon or <br /> chlorpyrifos. Analytical results of monitoring for pesticides on the 303(d) listing other than <br /> diazinon or chlorpyrifos are summarized in the attached Fact Sheet (Attachment Q. The <br /> analytical results indicate that lindane (an organochlorine pesticide) was detected in 7 of 19 <br /> sampling events; six of the 19 samples had elevated reporting limits of 0.25 µg/1. DDT (also an <br /> organochlorine pesticide) was reported in 1 of 17 sampling events. The single detection of DDT <br /> is not adequate evidence that there is reasonable potential to exceed the water quality objectives. <br /> However, per the Basin Plan requirements, this Order applies a non-detectable limitation to each <br /> individual organochlorine pesticide at any detection level. No individual pesticide may be <br /> present in the discharge at detectable concentrations. The Board finds that organochlorine <br /> pesticides are or may be discharged at a level that will cause or have the reasonable potential to <br /> cause, or contribute to, an in-stream excursion above the Basin Plan water quality objective. <br /> The Discharger should use EPA standard analytical techniques that have the lowest practical <br /> detection level for organochlorine pesticides with a maximum acceptable detection level of <br /> 0.02 ug/l. The Discharger is not currently capable of meeting this requirement with the current <br /> treatment facilities. <br /> 29. EPA has proposed adoption of the California Toxics Rule (CTR), which contains water quality <br /> standards applicable to discharges in California. Standards for the compounds in the CTR were <br /> not included in the National Toxics Rule (NTR). Some of the Standards in the proposed <br /> regulations differ from those in the NTR. Once adopted, federal regulations will require effluent <br /> limitations for all pollutants that are or may be discharged at a level that will cause or have the <br /> reasonable potential to cause, or contribute to an in-stream excursion above a CTR standard. A <br /> reopener clause is included in this permit to allow for inclusion of the new standards as they <br /> apply to this discharge. <br /> 30. Storm water runoff from the wastewater treatment plant is collected and recycled through the <br /> treatment system. <br /> 31. The California Department of Health Services has established statewide reclamation criteria in <br /> Title 22, California Code of Regulations, Section 60301, et seq. (hereafter Title 22) for the use <br />