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HUCr05-199 16:10 FROM Pub is Works TO 94640138 P.02 <br /> stere Of CA-CVRWQC13-(916)255.3030(eeU.for sec-up)-Cr md:20 May 1994 11;14- Paige 1 of 3 <br /> i-------------_'-------------------------------- <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO, <br /> FOR <br /> CITY OF LATHROP AND <br /> CROSSROADS SANITARY CORPORATION <br /> LATHROP INDUSTRIAL WASTEWATER TREATMENT PLANT <br /> SAN JOAQUIN COUNTY <br /> Specific sample station locations shall be established under direction of the Board's staff and a <br /> description of the stations shall be attached to this Order. <br /> EFFLUENT MONITORING <br /> Effluent samples shall be collected just prior to discharge to the disposal facility. Effluent samples <br /> should be representative of the volume and nature of the discharge. Samples collected from the outlet <br /> structure of ponds will be considered adequately composited. Time of collection of grab sample shall <br /> be recorded. Effluent monitoring Shall include at least the following: <br /> Constituents Sampling <br /> UlAiita T,ylze of Samnl� <br /> Flow mgd Cumulative Daily <br /> 20°C BODS mg(I Grab Weekly <br /> Suspended Matter M91 Grab Weekly <br /> Settleable Matter urnlyt Grab Weekly <br /> Total Nitrogen(as N) mg/1 Grab Weekly <br /> PH pH Units Grab Weekly <br /> Total Coliform Organisms MPNI100 ml Grab Weekly <br /> Total Dissolved Solids mg,'I Grab 7VIOU011Y <br /> Standard Minerals M81 Grab Annually <br /> POND MONITORING <br /> Pond samples should be representative of the volume and nature of the discharge. Time of collection <br /> of grab sample samples shall be.recorded. <br /> All ponds in use Shall be monitored. <br /> Sampling <br /> _nLQ Units TYnpFteem <br /> uta FJ_Pub <br /> Dissolved Oxygen(DO) mg/l Grab Weekly <br /> Freeboard feet ---- Weekly <br /> SLUDGE MONITORING <br /> A composite sample of Sludge shall be collected annually in accordance with EPA's POTW Sludge <br /> Sampling and Analysis Guidance Document, August 1989, and tested for the following metals: <br /> Cadmium Lead <br /> Chromium Nickel <br /> Copper Zinc <br />