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CLEANUP AND ABATEMEN't ORDER NO. 5-00-704 2 FORMER CHEVRON STATION#9-5775 301 WEST KETTLEMAN LANE ODI, SAN JOAQUIN COUNTY hours GR is scheduled to continue Aveeklr emraction at EX-I 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%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: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 fonder underground storage tanks City Well 12 operates intermittend-, at approximately 800 gallons per minute The well is constructed with a 108-foot annular seal, cased to 490 feet b.-,,s 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 has not been detected in this well at a detection limit of 3 µg/1 7 In October 1999, GR placed %tater 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 Ser-,ices Drinking Water Action Level for MtBE is 13 pg/1, and the Secondary Maximum Contaminant Level for taste and odor is 5 µg/1 9. Section 13304(a) of the California Water Code provides that "Any person 11,110 has discharged or discluuges waste into the%wers of this state to violation of any mast discharge rrqutrerneni or other order or prohtbliZu issued k-. a rt-gional board or the state board,or who has caused or permitted, cruses or pertruts,or threatens to caure or permit artr caste to be discharged or deposited where it is,or probably will be, Awharged into the waters of the state and creates,or tFinaiens to crew4 a condition ofpollution or nufsarw,shall upon ander ofthe regional board deanup such waste or abase the d'ecrs of the waste.or,fir the case of davatened ppAwdon or nuisance,take other necessary remedial action,lrcluding,but not limited to,overseeing cleanup and abatement efforts. Upon faflwv of airy person to comply with the cleanup and abatement order,the Attorney General,at the request of the board,shall petition the superior court for that county for the issuance of an Injunction requiring the person to comply with the order In any such suit,the court shall have ju,•rs bon to grant a prohibitory or mandatory tigunction,ether preliminary orpermanent.as thefad may warr=L- 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