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STAFF REPORT _ • • 5 SPX CORPORATION MARLEY COOLING TOWER COMPANY GROUNDWATER EXTRACTION AND TREATMENT SYSTEM SAN JOAQUIN COUNTY Deltakeeper commented on the tentative Order that the lack of system redundancy, alarms and employee training should be addressed in an accompanying enforcement Order. A Notice of Violation was issued by the Executive Officer to the Discharger on 10 February 2003. The Discharger is required to submit a technical report on its preventive and contingency plans for controlling accidental discharges, and for minimizing the effects of such events. The Discharger is also required to submit a contingency plan for implementing additional monitoring and inspections in the event of an accidental discharge or spill. This proposed Order includes a provision that the Discharger submit and implement these plans. Staff is coordinating enforcement with other involved agencies. SUMMARY Sufficient effluent data are available to determine that several constituents are or may be discharged at a level that will cause or have the reasonable potential to cause, or contribute to an in-stream excursion above a narrative or numeric water quality standard. These constituents and/or parameters include; copper, hexavalent chromium, total chromium, arsenic, TDS, chlorine residual, and toxicity. Effluent limitations have been established or retained for these constituents. This proposed Order includes a new 500 mg/L (ppm) monthly average effluent limitation for TDS applied at the point of discharge which, based upon currently available information, is necessary to comply with the secondary California MCLs contained in Title 22, California Code of Regulations and incorporated as chemical constituent water quality objectives in the Basin Plan. This proposed Order includes a time schedule to evaluate compliance alternatives RECOMMENDATION Adopt the proposed NPDES permit MarleyStaffReport