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.0 <br />146 <br />CENTRAL VALLEY REGIONAL WATER QUALITY CONTROL BOARD <br />M6121M <br />DISCHARGER: Cove Contractors, Incorporated <br />i 11F, 11 IKII 11 �•F1 I i I� IU! i �� 1 6 0 <br />CONTACT(S): Jack Hecht, Cove Contractors, Incorporated <br />David B. Sadwick, Heller, Ehrman, to & McAuliffe <br />I <br />ii 1 1,11 1 IN3 Q *41117•11! Fill F1171111111!11 <br />INSPECTED BY: Scott WA-,er, Associate Engineering Geologist <br />ACCOMPANIED BY- Stacey Mason, Integrated Waste Management Board, Closed, Illegal, and <br />Abandoned Section <br />Ed Padilla and Steve Sasson, San Joaquin County Public Health Services <br />F <br />MM <br />r, <br />-4011 T MM4 *an IMF 11 �Fff* 0 <br />511te! 5 d Wflller 10711TI"11-37 BFISK 111TRITURCUTrIng 21CLE-Ey"Mr-MILT Ras CL1stjL1-2rg7'-j_ UEMUITAMMM <br />and untreated auto shredder waste (ASW) containing PCBs. Asbestos containing waste has also been <br />identified at the site. Discharge of ASW occurred from 1973 to 1983. The facility has submitted a <br />Report of Waste Discharge which proposes to fill below grade areas with treated ASW. Inspection <br />features are shown on the attached location map. <br />We arrived at the site in the late afternoon during intermittent rain showers. Site topography is <br />irregular with large areas below grade. The deepest area (RWD Area E- cover borrow area) is within <br />fine grain soils approximately 26 feet below grade and has been referred to in the RWD as Area E <br />(cover borrow area). Localized ponding was present within Area E and sediment sources included <br />exposed ASW within the upper pit slopes. <br />Extensive areas of ASW are exposed at the surface east, northeast, and southeast of Area E (RWD <br />Areas B and C) . The exposed ASW consists of variably sized oxidized metal fragments, rubber hose <br />fragments, and other material fragments mixed in varying portions with soil and demolition debris. <br />Portions of the exposed ASW were vegetated with weeds while other areas were barren. Grading <br />was extremely poor, with numerous areas of ponded runoff directly on exposed ASW. <br />Reports submitted to comply with §13273 of the Water Code were accepted as meeting the <br />requirements for a Solid Waste Assessment Test (SWAT) report on 25 September 1989. However, the <br />RWD indicates ASW disposal areas substantially different from the SWAT report. Plate 2-4 of the <br />RWD shows a significant area of ASW north of the boundary indicated in the SWAT report <br />information (Plate 2 of the PCB Investigation Report dated 15 July 1988). Exposed ASW in that area <br />was indicated based on field observation during the inspection. A large storm water holding pond <br />was constructed directly on the misidentified and uncharacterized ASW. Ground water flow <br />directions (generally to the north-northeast) confirm that the existing monitoring system is <br />inadequate to assess the potential impact of ASW on ground water quality. <br />