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' CLEANUP AND ABATEMEN i ORDER NO 5-0{1-704 2 ' FORMER CHEVRON STATION #9-5775 Ol WEST K.ETTLEMAN LANE DI, SAN JOAQUIN COUNTY hours GR is scheduled to continue ,,%eckl\ extraction at EX-1 until an interim pump and treat System is installed 5 On 7 April 2000, GR submitted a workplan tc--, the San Joaquin County Environmental Health Division to install six additional momlonne \•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 neat 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 I2 is about 500 feet southwest and downgradient of the former underground storage tanks City Well 12 operates intermittentl\ at approxunately 800 gallons per minute The well is ' constricted 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 has not been detected in this well at a detection limit of 3 pg/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 concluded that the shallow groundwater zone is in communication with the municipal well lie 8 The California Department of Health Ser%zces Drinking Water Action Level for MtBE is 13 µg/1, and the Secondary Maximum Contaminant Level for taste and odor is 5 11g/l 9 Section 13304(a) of the California Water Code provides that• "Any person to-Ito has discharged or discharges%ape into the waters of this state in violation of any waste discharge requirement or other order or prohlbulon issued L4: a regional board or the state board,or who has caused or pernutted causes or pennies,or threatens to cause or permit am waste to be discharged or deposited where U is,or probably will be, discharged into the waters of the stare and creates,or threatens to crate a condition ofpolluuon or nuisance,shall upon ' order ofthe regional board cleanup such waste or abxe the ejects of the uave,or,in the case of threatene4pollsalon or nuisance,take other necessary rrmedhal action,trclud ng,but not limped to,overseeing cleanup and abatement efforts Upon fallure of anyperson to comply with the cleanup and abatement order.the Attorney General,at the request of the board,shall petition the superior court jar that op-sain ror the issuance of an Injunction requiring the person to h'omply with ' the order In any such suit,the court shall have jurisdiction to grant a prohibitory or mandatory Inunction,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,mcluding 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 ~