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FACT SHEET, ATTACHMENT C <br /> • -5- <br /> WASTE DISCHARGE REQUIREMENTS ORDER NO. 5-00- <br /> CITY OF LODI <br /> WHITE SLOUGH WATER POLLUTION CONTROL PLANT <br /> SAN JOAQUIN COUNTY <br /> monitoring shows there is a reasonable potential for ammonia concentrations to increase, then this <br /> Order may be reopened to include effluent limitations for ammonia. <br /> f) Temperature <br /> The SWRCB Water Quality Control Plan for Control of Temperatures in Coastal and Interstate <br /> Waters and Enclosed Bays and Estuaries of California (Thermal Plan) is applicable to this <br /> discharge. For purposes of the Thermal Plan, the discharge is considered to be an existing <br /> discharge of elevated temperature waste to an estuary. The Thermal Plan requires that such a <br /> discharge: <br /> A. Shall not exceed the receiving water temperature by more than 20°F; <br /> B. Shall not create a zone, defined by water temperatures of more than 1°F above natural <br /> receiving water temperature which exceeds 25 percent of the cross sectional area of a <br /> main river channel at any point; and <br /> C. Shall not cause a temperature rise greater than 4°F above the natural temperature of the <br /> receiving waters at any time or place. <br /> This permit includes the temperature limits as well as a Provision for the Discharger to evaluate its <br /> ability to comply. <br /> g) Chlorine <br /> Chlorine in the receiving water is extremely toxic and has reasonable potential to be discharged at <br /> significant concentrations. The Discharger monitors both chlorine residual and sulfur dioxide <br /> residual. By maintaining a low residual (positive amount) of sulfur dioxide in the effluent, the <br /> Discharger is relatively certain that there is no residual chlorine present in the effluent. <br /> Additionally, the Discharger monitors chlorine residual as a means of permit compliance. The <br /> current effluent limitation for total residual chlorine is 0.1 mg/1 as a daily maximum. The USEPA <br /> developed ambient water quality criteria for chlorine to protect freshwater aquatic organisms. <br /> EPA's ambient water quality criteria for protection of aquatic life are 11 µg/1 as a 4-day average <br /> (chronic) concentration, and 19 µg/1 as a 1-hour average (acute) concentration for total residual <br /> chlorine. EPA guidelines and the Basin Plan allow for mixing zones where water quality objectives <br /> can be exceeded, but no lethality is allowed. Therefore, this Order contains effluent discharge <br /> limitations for total residual chlorine of 0.01 mg/1 as a weekly average, and 0.019 mg/1 as an hourly <br /> average based on the ambient criteria to protect aquatic life. <br /> h) Electrical Conductivity (EC) <br /> Electrical conductivity is listed under the California 303(d) list as a water parameter causing <br /> impairment to portions of the Sacramento-San Joaquin Delta and San Joaquin River. This listing is <br />