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Sent By: RWQCB; 2553015; Apr -11-^r) 1:17PM; Page 5/7 CLEANUP AND ABATEMENT ORDER NO. FORMER CHEVRON STATION #9-5775 301 WEST KETTLEMAN LANE LODT, SAN JOAQUTN COUNTY Site -Specific Investigation and Cleanup Tasks Compliance Date 3. Initiate monthly sampling and analysis of groundwater from City Well 1 May 2000 12, and analyze groundwater samples for TPHg, benzene, toluene, ethyl � C benzene, total xylenes, ethylene dibromide, 1,2-dichloroethane, M.tBE, b TBA, DIPE, ETRE, TAME, ethanol, and methanol using EPA Method CSL 8260B_ pw 4 4. Submit a workplan to define the lateral and vertical extent of petroleum 10 May 2000 hydrocarbons and fuel oxygenates both on and off site. include the following: a. All soil and groundwater samples must be analyzed for fuel oxygenates using EPA Method 8260B b. Install multi-level cluster monitoring wells to serve as a sentinel well between the on-site contamination and City Well 12 5. Submit a complete Problem Assessment Report (PAR) acceptable to the 264ume 20d Board and. County staff, as described in Appendix A of the Tri -Regional Recommendations (enclosed as part of this order). The PAR must include requirements for any discharge pennit(s) required and a time !✓�y line for submittal of Report(s) of Waste Discharge. 4 6. Within 15 days of Board staff approval of the Problem Assessment _189h- -x Report, but no later than 31 July 2000, submit a Final Remediation Plan (described in Appendix A) for the cleanup of the soil and groundwater at the site. 7. Within 15 days of Board staff approval of the selected. Remedial Option, but no later than 1 September 2000, implernent and continuously ` operate, the approved remediation system, with the exception of, periodic and scheduled maintenance. Any interruption in the operation of the cleanup system(s), other than for scheduled maintenance, without prior approval of the Executive Officer, is a violation of this Order. Reporting and Permits 8. Notify the Board and County staff at least two business days prior to any site work or sampling. 9. Obtain all necessary local and state permits prior to beginning work. 10. Submit all reports and correspondence to the Board's Sacramento Office, the San Joaquin County Environmental Health Division, and all parties (or representatives) identified in this Order. Under penalty of perjury, the technical reports as directed, which shall be submitted to the Executive Officer of the Board, and to the County, must be signed by an appropriately licensed professional (technical reports and plans, including; drilling logs and soil. and groundwater