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MONITORING AND REPORTING PROGRAM -2- <br /> CITY OF MANTECA AND CITY OF LATHROP <br /> WASTEWATER QUALITY CONTROL FACILITY <br /> SAN JOAQUIN COUNTY <br /> Sampling <br /> Constituent Units Type of Sample Frequencv <br /> Flow MGD Cumulative Continuous <br /> Oil & Grease' mg/l Grab Weekly <br /> Nitrate (as N) mg/l Grab Weekly <br /> Ammonia (as N)' mg/l Grab Weekly <br /> ' Only for discharge to surface waters <br /> z Standard minerals include Total Dissolved Solids, Electrical Conductivity, <br /> Chloride, Sulfate, Nitrate, Bicarbonate Alkalinity, Carbonate Alkalinity, <br /> Calcium, Magnesium, Potassium, Sodium, pH, and Hardness. <br /> HOLDING POND MONITORING <br /> Sampling <br /> Constituent Units Type of Sample Frequency <br /> Dissolved Oxygen mg/l Grab Weekly <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-1 100 feet upstream from the point of discharge <br /> R-2 500 feet downstream from the point of discharge <br /> R-3 1 mile downstream from the point of discharge <br /> R-4 2 miles downstream from the point of discharge <br /> Sampling <br /> Constituents Units Station Freauencv <br /> Dissolved Oxygen mg/l R-1 thru R-4 Weekly' <br /> PH pH Units R-1, R-2, Weekly' <br /> Turbidity NTUs R-1, R-2 Weekly' <br /> Temperature OF R-1, R-2 Weekly' <br /> Chlorine Residual mg/l R-1, R-2 Weekly' <br /> Total Nitrogen mg/l R-1 , R-2 Weekly' <br /> Samples shall be collected weekly from 1 May through 31 October and <br /> every two weeks for the remainder of the year. <br />