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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. CA0081559 <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 /> INFLUENT 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 Type of Sample Frequency <br /> 20°C BODS mg/1 24 hr. Composite Daily <br /> Suspended Solids mg/I 24 hr. Composite Daily <br /> EFFLUENT MONITORING <br /> (When discharging to surface waters) <br /> Effluent samples shall be collected downstream from the last connection through which wastes can be admitted <br /> into the outfall. Effluent 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. Effluent monitoring shall include at least the following: <br /> Sampling <br /> Constituents Units Type of Sample Frequency <br /> 20°C BODS mg/1 24 hr. Composite Daily <br /> Suspended Matter' mg/1 24 hr. Composite Daily <br /> Settleable Matter mm Grab Daily <br /> Total Dissolved Solids mg/1 Grab Quarterly <br /> Standard Minerals' mg/1 Grab Yearly <br /> pH1 pH units Grab Daily <br /> Bioassay' (96-hr. static) % Survival Grab Weekly <br /> Total Coliform Organisms' MPN/100 ml Grab Daily <br />