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tCLEANUP AND ABATEMEN"t ORDER NO 5-00-704 2 FORR4ER CHEVRON STATION #9-5775 301 WEST KETTLEMAN LANE ODI, SAN JOAQUIN COUNTY ' hours GR is sclieduled to continue Nveekh extraction at E\-1 until an interim pump and treat system is installed ' 5 On 7 April 2000, GR submitted a workplan to the San Joaquin County Environmental Health Division to install six additional monitoring \t ells to further define the lateral and vertical extent ' of petroleum Hydrocarbons and fuel o\ygenates both on-site and offsite One deep monitoring well will be installed neat to 1,71V-8 to sen e :-, a sentinel well between the on-site contamination and the active City of Lodi Municipal Well l' (City Well 12) 1 G City Well 12 is about 500 feet southwest and downgradient of the former underground storage g tanks City Well 12 operates intemuttenth at approximately 800 gallonc 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 intenal 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 monitoring wells for a 3-day ' period and recorded fluctuation changes corresponding 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 Sen7ces Drinking Water Action Level for MtBE is 13 µg/l, and the Secondary Maximum Contaminant Level for taste and odor is 5 µg/1 ' 9 Section 13304(a) of the California Water Cods provides that- "Ally ilny person who has discharged or dnsdiarges Kcsre into the waters of this state in violation of arty waste discliarge requirement or other order or prohibulon issued b-. a regional board or the state board,or who has caused or pernutted, anuses or pernuts,or threatens to cause or permit am ..ante to be discharged or deposued where st is,or probably will be. disd wZed into the waters of the state and creates.or tkrvatens to create a condition ofpolluthon or nuisance.shall upon ' order ofthe regional board cleanup such waste or abatr the eeats ofthe uvwe.or.in the can ofthreatened pollw)kw or nuisan",take other necessary rx rWW action,&. duding.but not limited to,mierseeing damup and abatemerht efforts Upon failure of any person to comply with the deanup and abatement order.the Attorney General.at the request of the bo=4 shall petition the superior count for that aounn for the issuance of an!rt junction requiring the person to Qontply with ' the order In any such suit the court shall haw jurudiction to grant a prohibitory or mandatory lijunction,either preliminary or permanent.as the fad may warrant." 10. The Water Quality Control Plan for the Reaonal 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 1