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WASTE DISCHARGE REQUkMENTS ORDER NO. 2000-**** <br /> -10- <br /> CITY OF LODI <br /> WHITE SLOUGH WATER POLLUTION CONTROL PLANT <br /> SAN JOAQUIN COUNTY <br /> Monthly Weekly Daily Daily <br /> Constituents Units Average Average Average Maximum <br /> Dissolved Oxygen mg/l 54 <br /> - lbs/day 2923 <br /> Total Suspended mg/1 302 452 902 <br /> Solids lbs/day 17513 26273 52543 <br /> Settleable Solids mill 0.1 <br /> Chlorine Residual mg/1 0.01 0.019 <br /> Oil and Grease mg/1 10 15 <br /> Cyanide, total µg/l 5.2 10 <br /> lbs/day 0.33 0.583 <br /> Zinc, total n1l 1015 <br /> lbs/day 5.93 <br /> Lead, total gg/l 3.6 <br /> lbs/day 0.213 <br /> Organochlorine <br /> Pesticides µg/1 ND6 <br /> 1 5-day,20°C biochemical oxygen demand (BOD) <br /> 2 To be ascertained by a flow proportional 24-hour composite sample. <br /> 3 Based on an average dry weather flow capacity of 7.0 mgd. <br /> 4 Discharge must meet or exceed 5 mg/l dissolved oxygen. <br /> 5 Based on a conversion factor of 0.986 from dissolved to total recoverable zinc. <br /> 6 ND(non-detectable),The non-detectable limitation applies to each individual pesticide at any detection <br /> level. No individual pesticide may be present in the discharge at detectable concentrations. The <br /> Discharger shall use EPA standard analytical techniques that have the lowest practical level for <br /> organochlorine pesticides with a maximum acceptable detection level 0.02µg/1. <br /> 2. Interim total coliform organism wastewater effluent limits shall be in effect through <br /> 30 April 2004. The effluent limit shall allow a monthly median concentration of <br /> 23 MPN/100 ml and a daily maximum of 500 MPN/ 100 ml. <br /> 3. Effective 1 May 2004, a new discharge effluent limitation for total coliform organisms <br /> and turbidity shall be applied. <br /> Monthly Monthly Daily <br /> Constituents Units Average Median Maximum <br /> Total Coliform MPN/100 ml 2.2 23 <br /> Organisms <br /> Turbidity NTU 2 5 <br /> 4. The arithmetic mean of 20°C BOD (5-day) and total suspended solids in effluent <br /> samples collected over a monthly period shall not exceed 15 percent of the arithmetic <br /> mean of the values for influent samples collected at approximately the same times during <br /> the same period (85 percent removal). <br />