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M <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> REVISED 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 <br /> description 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 <br /> representative of the influent for the period sampled. The following shall constitute the influent <br /> monitoring program: <br /> Sampling <br /> Constituent Units Type of Sample Frequency <br /> 20°C BODS mg/l 24 hr. Composite Daily <br /> Suspended Solids mg/1 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 <br /> admitted into the outfall. Effluent samples should be representative of the volume and nature of the <br /> discharge. Samples collected from the outlet structure of ponds will be considered adequately <br /> composited. Time of collection of a grab sample shall be recorded. Effluent monitoring shall include at <br /> 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 ml/1 Grab Daily <br /> Total Dissolved Solids mg/1 Grab Quarterly <br /> Standard Minerals mg/1 Grab Yearly <br /> pH pH units Grab Daily <br /> Bioassay % Survival Grab Weekly <br /> Total Coliform Organisms MPN/100 ml Grab Daily <br /> Chlorine Residual mg/l Grab Daily <br /> Temperature °F/°C Grab Daily <br /> Flow MGD Cumulative Continuous <br />