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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO. <br /> NPDES NO. CA0079138 <br /> FOR <br /> CITY OF STOCKTON MAIN WATER QUALITY CONTROL PLANT <br /> SAN JOAQUIN COUNTY <br /> EFFLUENT MONITORING <br /> Effluent samples shall be collected downstream from the last connection through <br /> which wastes can be admitted into the outfall . Samples collected from the <br /> effluent structure will be considered adequately composited. The following <br /> shall constitute the effluent monitoring program: <br /> Constituent Units Type of Sample Sampling Frequency <br /> 20°C BODS mg/1 , lbs/day 24-hr. Composite Daily(l) <br /> % removal <br /> Total Suspended Solids mg/l , lbs/day 24-hr. Composite Daily <br /> % removal <br /> Conductivity umhos/cm 24-hr. Composite Weekly <br /> Settleable Matter ml/l 24-hr. Composite Daily <br /> Total Dissolved Solids mg/1 24-hr. Composite Monthly <br /> Standard Minerals mg/l 24-hr. Composite Yearly <br /> PH Number Continuous Daily <br /> Bioassay % Survival Grab or Continuous Weekly <br /> Total Coliform MPN/100 ml Grab Daily(2) <br /> Organisms <br /> Chlorine Residual mg/1 Continuous Daily <br /> Flow MGD Continuous Daily <br /> Grease & Oil mg/l , lbs/day Grab Weekly <br /> Temperature "C & OF Grab Daily <br />