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• <br /> MONITORING AND REPORTING PROGRAM -2- <br /> THE MARLEY COOLING TOWER COMPANY <br /> STOCKTON, SAN JOAQUIN COUNTY <br /> The following shall constitute the effluent monitoring program for the treatment <br /> plant when the ground water extraction is cycling for periods of time greater <br /> than two days. <br /> Constituents Units Type of Sample Freauencv <br /> Flow mgd Cumulative Continuous <br /> Total Chromium pg/l Composite 1 sample @ cycle <br /> Hexavalent Chromium Ng/l Grab 1 sample @ cycle <br /> Copper Ng/l Composite 1 sample @ cycle <br /> Arsenic pg/l Composite 1 sample @ cycle <br /> Total Dissolved Solids mg/l Composite 1 sample @ cycle <br /> pH pH Units Composite Continuous <br /> Fish Bioassay Acute* Grab 100% Effluent Quarterly <br /> Fish Bioassay Chronic* TUB Grab 100% Effluent Twice a Year <br /> Invertebrate Chronic Toxicity TUB Grab 100% Effluent Monthly <br /> * Optimally, one of these tests should be conducted every other month. <br /> RECEIVING WATER MONITORING <br /> 1 . During periods of flow in the Stockton Diverting canal monitoring of <br /> receiving water quality is to be included in the Monitoring and Reporting <br /> Program. All receiving water samples shall be grab samples. Receiving <br /> water monitoring shall include at least the following: <br /> Station Description <br /> Main Street Bridge, R-1 7500 feet upstream from the point of discharge <br /> Fremont Street Bridge, R-2 1450 feet downstream from the point of discharge <br /> Constituents Units Station SamplingFrequency <br /> Total Chromium Ng/l R-1, R-2 Quarterly <br /> Hexavalent Chromium pg/l R-1, R-2 Quarterly <br /> Copper Ng/l R-1, R-2 Quarterly <br /> Arsenic Ng/l R-1, R-2 Quarterly <br /> Total Dissolved Solids mg/l R-1, R-2 Quarterly <br /> Hardness mg/l CaCO3 R-1, R-2 Quarterly <br /> pH Number R-1, R-2 Quarterly <br /> Total Suspended Solids mg/l R-1, R-2 Quarterly <br /> Total Organic Carbon mg/l R-1, R-2 Quarterly <br /> Specific Conductance US R-1, R-2 Quarterly <br /> Dissolved Oxygen mg/l R-1, R-2 Quarterly <br /> Turbidity % R-1, R-2 Quarterly <br /> Temperature OF R-1, R-2 Quarterly <br />