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MONITORING AND REPORTING PROGRAM NO. R5-200340XXX • 2 SPX CORPORATION MARLEY COOLING TOWER COMPANY SAN JOAQUIN COUNTY Constituents Units Type of Sample Frequency Dissolved Oxygen mg/L (ppm) Grab Monthly Chlorine Residual mg/L (ppm) Grab Monthly lbs/day Hardness (as CaCO-.)t mg/L (ppm) Grab Monthly Total Dissolved Solids mg/L (ppm) Grab Monthly Total Suspended Solids mg/L (ppm) Grab Monthly Total ChromiUM2 µg/1 (ppb) Grab Monthly lbs/day Hexavalent Chromium' gg/1 (ppb) Grab Monthly lbs/day Copper(Total)2 µg/1 (ppb) Grab Monthly lbs/day Arsenic (Total)2 µg/I (ppb) Grab Monthly lbs/day Iron (Total) gg/l (ppb) Grab Quarterly Turbidity NTU Grab Monthly Acute Toxicity4 % Survival Grab Quarterly Concurrent with metals monitorine. At a minimum the Discharger shall comply with the Monitoring Requirements for these constituents as outlined in Section 2.3 and 2.4 of the Policy for Implementation of Toxics Standards for Inland Surface Waters,Enclosed Bays,and Estuaries of California(SIP),adopted 2 March 2000 by the State Water Resources Control Board. For each priority pollutant use an analytical method from the SIP,Appendix 4 with a Minimum Level(ML)below all applicable pollutant criteria. In accordance with Section 2.4.2 of the SIP,the Discharger is to instruct the laboratory analyzing samples for priority pollutants to establish calibration standards so that the ML is the lowest calibration standard. At no time is the Discharger to use analytical data derived from extrapolation beyond the lowest point of the calibration curve.Report all peaks identified by the EPA test methods.- 3 ethods:3 Field measurements. 4 The acute bioassays samples shall be analyzed using EPA/600/4-90/027F,Fourth Edition,or later amendment with Board staff approval. Temperature and pH shall be recorded at the time of bioassay sample collection. Test species shall be fathead minnows(Pimephales promelas).