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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO. 97-115 <br /> NPDES NO. CA0081558 <br /> FOR <br /> CITY OF MANTECA AND CITY OF LATHROP <br /> WASTEWATER QUALITY CONTROL FACILITY <br /> SAN JOAQUIN COUNTY-- <br /> Specific sample station locations shall be established under direction of the Board's staff, and a description <br /> of the stations shall be attached to this Order. <br /> INTFLUENT MONITORING <br /> Samples shall be collected at approximately the same time as effluent samples and should be representative <br /> of the influent for the period sampled. The following shall constitute the influent monitoring program: <br /> Sampling <br /> Constituent Units Tvpe of Sa=le Freauencv <br /> 20°C BODS mg/1 24 hr. Composite Daily <br /> Suspended Solids mg/1 24 hr. Composite Daily <br /> EFFLUENT MONITORING <br /> (When discharging to surface waters) <br /> Emuent samples shall be collected downstream from the last connection through which wastes can be admitted <br /> into the outfall. Eluent samples should be representative of the volume and nature of the discharge. Samples <br /> collected from the outlet structure of ponds will be considered adequately composited. Time of collection of <br /> a grab sample shall be recorded. Eluent monitoring shall include at least the following: <br /> Sampling <br /> Constituents Units �e of Sample Freauencv <br /> 20°C BODS mg/1 24 hr. Composite Daily <br /> Suspended Matter' mg/1 24 hr. Composite Daily <br /> Settleable Matter ml/l Grab Daily <br /> Total Dissolved Solids mg/1 Grab Quarterly <br /> Standard Nimerals m--A Grab Yearly <br /> DH' pH units Grab Daily <br /> Bioassay' (96-hr. static) % Survival Grab Weekly <br /> Total Coliform Organisms' MPN/100 ml Grab Daily <br />