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REVISED MONITORING AND REPORTING PROGRAM NO. 97-115 3 <br /> CITY OF MANTECA AND CITY OF LATHROP <br /> WASTEWATER QUALITY CONTROL FACILITY <br /> SAN JOAQUIN COUNTY <br /> Sampling <br /> Constituents Units Type of Sample Frequencv <br /> Flow mgd Continuous Daily <br /> 20°C BODS mg/1 Grab Twice Monthly <br /> Settleable Matter mUl Grab Twice Monthly <br /> Total Dissolved Solids mg/I Grab Quarterly <br /> Specific Conductivity µmhos/cm Grab Twice Monthly <br /> Ammonia(as N) - mg N/1 Grab Twice Monthly <br /> Nitrate (as N� mg/I Grab Twice Monthly <br /> Total Metals mg/I Grab Annually' <br /> Total Metals shall include analyses for Cadmium, Chromium, Copper, Lead,Nickel, and <br /> Zinc. <br /> ' Samples shall be collected during the month of August. - <br /> If the discharge is intermittent rather than continuous,then on the first day of each such intermittent <br /> discharge,the Discharger shall monitor and record data for all of the constituents listed above,with the <br /> exception of metals analyses, after which the frequencies of analysis given in the schedule shall apply for <br /> the duration of each such intermittent discharge. In no event shall the Discharger be required to monitor <br /> and record data more often than twice the frequencies listed in the schedule. <br /> HOLDING POND MONITORING <br /> Sampling <br /> Constituents Units Type of Sample Frequencv <br /> Dissolved Oxygen mg/I Grab Weekly <br /> Pond Freeboard feet staff gage Monthly <br /> RECEIVING WATER MONITORING <br /> All receiving water samples shall be grab samples. Receiving water sampling may be postponed or <br /> eliminated if hazardous water conditions prevent safe access to the sampling locations and when prior <br /> approval is received from the Regional Board' s Executive Officer. Receiving water monitoring shall <br /> include at least 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 />