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MONITORING AND REPORTIN%.,lROGRAM ../ <br /> CITY OF TRACY <br /> SAN JOAQUIN COUNTY -2- <br /> Sampling <br /> Constituents Units Type of Sample Frequency <br /> Total Dissolved Solids mg/l Grab Monthly <br /> Specific Conductivity umhos/cm Grab Monthly <br /> @250C <br /> Standard Minerals mg/l Grab Yearly <br /> pH pH Units Grab Daily <br /> Bioassay % Survival Grab Weekly <br /> Total Coliform MPN/100 ml Grab Daily <br /> Organisms <br /> Chlorine Residual mg/l Grab Daily <br /> Flow MGD Continuous Daily <br /> Oil and Grease mg/1 , lbs/day 24 hr. Composite Weekly <br /> HOLDING POND MONITORING <br /> Constituents Units Type of Sample Frequency Location <br /> Dissolved Oxygen mg/l Grab Weekly Each Pond <br /> RECEIVING WATER MONITORING <br /> All receiving water samples shall be grab samples. Receiving water samples shall <br /> be taken from the following: <br /> Station Description <br /> R-1 Old River 500 feet (152 m) upstream from the point of discharge <br /> R-2 Old River 500 feet (152 m) downstream from the point of discharge. <br /> R-3 Old River 5 miles (8 km) downstream from the point of discharge. <br /> Sampling <br /> Constituents Units Station Frequency <br /> Dissolved Oxygen mg/l R-1 , R-2, R-3 Twice Monthly <br /> PH pH Units R-1 , R-2 Twice Monthly <br />