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CLEANUP AND ABATEMENT ORDER NO 5-00-704 2 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 - On 7 April 2000, GR submitted a workplan to the San Joaquin County Environmental Health Division to install six additional monitonng «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 e -s 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 fonner underground storage tanks City Well 12 operates intermittently 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. The City of Lodi Water Department analyzes monthly samples from City Well 12 using EPA Method 524 2 MtBE has not been detected in this well at a detection limit of 3 pg/1 7 In October 1999, GR placed water level transducers in two on-site monitonng wells for a 3 -day period and recorded fluctuation changes corr.sponding to pumping of City Well 12 GR concluded that the shallow groundwater zone is in communication with the municipal well 8 The California Department of Health Services Dnnkmg Water Action Level for MtBE is 13 µg/1, and the Secondary Maximum Contaminant Level for taste and odor is 5 pg/l 9 Section 13304(a) of the California Water Code provides that• "Any person who has discharged or discharges same trio the waters of this state in violation of any waste discharge requirement or other order or prohibition issued b: a regional board or the state board, or who has caused or permitted causes or permits, or threatens to cause or pernuz am, %erste to be discharged or deposited where it is, or probably will be, discharged into the waters of the state and creates or irreatens to create, a condition of pollution or nuisance, shall upon order of the regional board cleanup such waste or abue the effects of the waste, or, to the case of threatened pollution or nuisance, take other necessary remedial action irrlud ng, but not limited to, overseeing cleanup and abatement efforts Upon failure of any person to coniply with the cleanup and abatement order, the Attorney General, at the request of the board, shall petition the superior court for that co-mn for the issuance of art inunction requiring the person to comply with the order In any such suit, the court shall havejurtsdiction to grant a prohibitory or mandatory injunction, 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) (Basin Plan) 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