FIELD DOCUMENTS AND WORK PLANS 1987

Home Browse Search

CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGIOND ��, T1a ORDER NO. (0';x66 u t n NPDES NO. CA0081787 julu 1 i 1911 WASTE DISCHARGE REQUIREMENTS ENVIROMENlAL HEALTH FOR FERMIT/SERVICLS THE MARLEY COOLING TOWER COMPANY STOCKTON, SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region, (here- after Board) finds that: 1. The Marley Cooling Tower Company (hereafter Discharger) submitted a Report of Waste Discharge, dated 27 February 1987, to discharge waste under the National Pollutant Discharge Elimination System (NPDES) . 2. The discharge was regulated by Order No. 86-004, adopted by the Board on 24 January 1986. 3. The Discharger owns a cooling tower fabrication plant in Section 55, T2N, RX, MDB&M, in the East Stockton Area, San Joaquin County (Attachment A). Wood treatment facilities are utilized in the Discharger's fabrication process. As a result, rainfall , which comes in contact with treated cooling tower components, becomes contaminated. The primary chemicals of concern are: chromium, copper, and arsenic. Chromium is also present at elevated levels in both the soil and ground water. Arsenic and copper have not been detected in ground water and appear to be isolated to the upper 10 feet of soil . 4. The Board, on 28 November 1984, ratified a Settlement Agreement between the Department of Health Services, the Discharger, and the Board which requires the Discharger to: define the extent of contamination, develop a mitigation plan, and implement all measures necessary to remediate existing site contamination. The Discharger will perform these tasks in accordance with the compliance time schedule contained in the agreement. 5. In order to facilitate the implementation of the mitigation plan, storm water from the site must be managed, and ground water from beneath the site must be removed. Therefore, the Discharger proposes to discharge storm water and ground water from an ion exchange treatment system (Attachment B) into the Stockton Diveting Canal , at a point 1/4 mile east of the site. The Stockton Diverting Canal enters the Calaveras River, a water body of the United States. 6. The Discharger has implemented site improvements which will minimize the contaminants contained in the storm water prior to treatment. The measures include: (a) The installation of drip pads to collect any drops of preser- ving solution from treated wood after it has been removed from the retorts. Treating solution drips are collected and returned to work tanks for reuse;