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CLEANUP AND ABATEMENT ORDER N0.•007-0709 • -12 J. GILBERT MOORE, EILEEN A.MOORE,AND NEW WEST PETROLEUM, INC. NEW WEST PETROLEUM#1003/FLAG CITY SHELL LODI, SAN JOAQUIN COUNTY 7. Within 30 days of staff concurrence with the Workplan, but no later than 21 September 2007, implement the work plan in accordance with the approved time schedule, which shall become part of this Order. 8. Submit results of the site investigation in a Preliminary Investigation and Evaluation Report (PIER) in accordance with the approved time schedule, but no later than 15 November 2007. The PIER shall include recommendations and, if needed, a second workplan for additional investigation. If additional investigation is necessary, the workplan shall include a time schedule for completing the work and submitting the results. 9. Within 30 days of staff concurrence with the workplan for additional site assessment, and in accordance with the approved time schedule, implement the Workplan. 10. Upon defining the extent of wastes, but no later than 1 February 2008, submit a Problem Assessment Report (PAR) which includes information from the implementation of the workplan and sufficient detail on the nature and extent of the release to provide a basis for future decisions regarding subsequent cleanup and abatement actions. RISK ASSESSMENT 11. By 30 November 2007, submit a risk assessment to demonstrate whether the waste constituents pose unacceptable risks to human health or the environment. The site- specific risk assessment must use the Office of Environmental Health Hazard Assessment (OEHHA) toxicity data (California cancer slopes). If the risk assessment suggests that the contamination poses a threat to human health, the report shall include a workplan to abate the risk or exposure. The proposed abatement work shall begin within 60 days of approval by Water Board staff, or by 22 February 2008, whichever is sooner. FEASIBILITY STUDY 12-By 18 April 2008, submit a Feasibility Study that provides a summary of remedial alternatives evaluated to address applicable cleanup levels for the affected or threatened human health and/or waters of the State. The Feasibility Study shall propose at least two remedial technologies that have a substantial likelihood to achieve cleanup of all impacted soils and groundwater and shall include a schedule for achieving cleanup. The remedial technologies must be evaluated with respect to their ability to be implemented, cost, and effectiveness. The Feasibility Study shall include the rationale for selecting the preferred remedial alternative. The Discharger shall attempt to clean up each constituent to background concentrations, or to the lowest level that is technically and economically achievable and which complies with all applicable WQOs of the Basin Plan and promulgated water quality criteria.