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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO. <br /> NPDES O. CA0079154 <br /> FOR <br /> CITY OF TRACY <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 MQNITQRING <br /> Samples shall be collected at approximately the same time as effluent samples and should be <br /> representative of the influent. Influent monitoring shall include atleast the following: <br /> Sampling <br /> Constituent Units Type of 5aml2le Frequency <br /> Flow mgd meter Continuous <br /> pH pH Units meter Continuous <br /> 20°C BODS mg/l, lbs/day 24 hr. Composite Daily <br /> Suspended Solids mg/l, lbs/day 24 hr. Composite Daily <br /> Specific Conductivity @25°C µmhos/cm Grab Daily <br /> Total Dissolved Solids mg1l Grab Weekly <br /> EFFLUENT MONITORING <br /> Effluent samples shall be collected downstream from the last connection through which wastes can <br /> be admitted into the outfall. Effluent samples should be representative of the volume and quality of <br /> the discharge. Time of collection of samples shall be recorded. Effluent monitoring shall include <br /> atleast the following: <br /> Sampling <br /> Constituent Unita Type of Sa=le Frequency <br /> Flow mgd Continuous Daily <br /> 20°C BODS mg/l, lbs/day 24 hr. Composite Daily <br /> Suspended Solids mg/l,lbs/day 24 hr. Composite Daily <br /> Settleable Solids MIA Grab Daily <br /> pH pH Units Grab Daily <br /> Total Coliform Organisms MPN/100 ml Grab Daily <br /> Chlorine Residual mg/l Grab Daily <br /> Temperature °F/°C Grab Daily <br /> Electrical Conductivity @25°C µmhos/crn Grab Daily <br /> Acute Toxicity' % Survival Flow Through Weekly <br /> Ammonia2,3 (as N) mg/1 Grab Weekly <br /> Oil and Grease mg/l 24 hr. Composite Weekly <br /> Total Dissolved Solids mg/l Grab Weekly <br /> Standard Minerals4 mg/1 Grab Yearly <br /> 1 Test procedures to follow the latest version of EPA/600/4-90/027,using fathead minnows or rainbow <br /> trout <br /> 2 Concurrent with Biotoxicity Monitoring <br /> 3 Report as Total and Un-ionized ammonia <br /> 4 Standard Minerals shall include all major cations and anions and include cation/anion balance. <br />