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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> ORDER NO. R5-2002-XXXX <br /> NPDES NO. CA0081787 <br /> WASTE DISCHARGE REQUIREMENTS <br /> FOR E <br /> MARLEY COOLING TOWER COMPANY <br /> GROUNDWATER EXTRACTION AND TREATMENT SYSTEM <br /> SAN JOAQUIN COUNTY <br /> The California Regional Water Quality Control Board, Central Valley Region, (hereafter Regional N <br /> Board) finds that: <br /> 1. The Marley Cooling Tower Company(MCTC), a wholly owned subsidiary of SPX Corporation <br /> (hereafter Discharger) submitted a Report of Waste discharge, dated <br /> 24 December 1997, and applied for a permit renewal to discharge waste under the National <br /> Pollutant Discharge Elimination System (NPDES) from the E ischarger's groundwater treatment <br /> plant. <br /> 2. The Discharger owns and operates a cooling tower fabrication plant in the East Stockton Area in A San Joaquin County. As part of the fabrication operations, the Discharger operated a wood <br /> preservation process utilizing solutions containing copper, chromium and arsenic. Wood <br /> preserving was discontinued at this facility in January 1991, however past operational practices <br /> have resulted in contamination of soils and groundwater underlying the site. Soils have been <br /> contaminated with copper, chromium, and arsenic; ground,vater has been contaminated with <br /> chromium and copper. The site is in Section 32, T2N, R7h, MDB&M, as shown on Attachment <br /> A, a part of this Order. <br /> 3. On 28 November 1984 the Regional Board ratified a Settlement Agreement between the <br /> Department of Health Services (now Department of Toxic Substances Control (DTSC)), the <br /> Discharger, and the Regional Board. This Settlement Agreement required the Discharger to <br /> conduct a Remedial Investigation/Feasibility Study(RDFS) to define the extent of <br /> contamination, to develop a Remedial Action Plan (RAP), and to implement all measures <br /> necessary to remediate existing site contamination. Following discussions with Regional Board <br /> staff, DTSC formally adopted the RAP on 29 August 1990. The RAP included the conceptual <br /> design of the groundwater remediation project. The recommended groundwater remedial action <br /> in the RAP includes the extraction, treatment, and discharge of contaminated groundwater. <br /> 4. To minimize dewatering of the local aquifer and to aid in flushing of contaminants, <br /> approximately 5% of the treated water is reinjected into shallow soils in the area of a closed <br /> retort pit at 37 degrees, 58 minutes, 11 seconds latitude and 121 degrees, 14 minutes, 00 seconds <br /> longitude. The injected water is then recaptured by the groundwater extraction system. The <br /> discharge of treated water to groundwater is regulated by Discharge Specification C, a part of <br /> this Order, which requires total recapture of groundwater. <br />