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CLEANUP AND ABATEMc.N T ORDER NO 5-00-704 FORMER CHEVRON STATION #9-5775 301 WEST KETTLEMAN LANE LOD1, SAN JOAQUIN COUNTY hours GR is scheduled to continue weekly extraction at EX -1 until an interim pump and treat system is installed - 2 On 7 April 2000, GR submitted a workplan to the San Joaquin County Environmental Health Division to install six additional momtonni_ «ells to further define the lateral and vertical extent of petroleum hydrocarbons and fuel oxygenates both on-site and offsite One deep monitoring well will be installed next to MW -8 to sen a _; a sentinel well between the on-site contamination and the active City of Lodi -Municipal Well 12 (City Well 12) G City Well 12 is about 500 feet southwest and downgradient of the former undeiground storage tanks City Well 12 operates intermittentls. at approximately 800 gallons per minute The well is constructed with a 108 -foot annular seal, cased to 490 feet bgs without a gravel pack, and the first perforated interval is at 210 feet bgs Th:. City of Lodi Water Department analyzes monthly samples from City Well 12 using EPA Method 524 2 MtBE Inas not been detected in this well at a detection limit of 3 n/l 7 In October 1999, GR placed water level transducers in two on-site monitoring wells for a 3 -day period and recorded fluctuation changes corresponding to pumping of City Well 12 GR isconcluded that the shallow groundwater zone is in conununication with the municipal well 8 The California Department of Health Services Drinking Water Action Level for MtBE is 13 µg/1, and the Secondary Maximum Contaminant LeN el for taste and odor is 5 gg/l 9 Section 13304(a) of the California Water Code provides that Any person who has discharged or discharges u sre irto the waters of this state in violation of any waste discharge requirement or other order or prohibttion issued t* a regional board or the state board or who has caused or perintued, causes or permits, or threatens to cause or permit am uaste to be discharged or deposited where it is, or probably will be discharged into the waters of the state and creates or trreatens to create, a condition of pollution or nuisance, shall upon order of the regional board cleanup such waste or aba a the effects of the waste or, in the case of threatened pollution or nuisance, tate other necessary remedial action irclua.ng but not limited to, overseeing cleanup and abatement efforts Upon failure of ani person to conipl) with the clearuc and abatement order, the Attorney General as the request of the board shall petition the superior court far that cosunn for the issuance of an nyu notion requiring the person to comply with the order In any such suit the court shall havejunsdi.-non to grant a prohibitory or mandatory ityunction either preliminary or permanent as the fact may warrant 10 The Water Quality Control Plan for the Regional Water Quality Control Board, Central Valley Region, (4th Edition) (Bashi Pian) establishes beneficial uses and water quality objectives to protect the beneficial uses Water quality objectives for groundwater as specified in the Basin Plan include primary and secondary maximum contaminant levels Waste, including MTBE, has been discharged to waters of the state at concentrations that exceed water quality objectives Exceedance of water quality objectives constitutes pollution Therefore, waste, including MTBE, has been discharged or deposited where it has created and continues to threaten to create a condition of pollution or nuisance