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Stantec PEA WORKPLAN Proposed Lodi Energy Center Site Lodi, California 5.0 PROPOSED FIELD INVESTIGATION 5.1 PRE-FIELD ACTIVITIES 5.1.1 Scoping Meeting and Site Visit Prior to final work plan preparation, a scoping meeting was held with the DTSC case worker on August 14, 2009 at the DTSC Sacramento Field Office. The proposed scope was discussed and the City of Lodi agreed to and incorporated the modifications requested by DTSC into this document. Stantec will also perform a Site visit accompanied by a City representative to evaluate site-specific access, logistical, and safety issues. As discussed at the scoping meeting, geotechnical considerations require that the top 18 inches of soil across the entire site be replaced with engineered fill. Based on the previous soil analytical results discussed above in Section 4.1, this soil exceeds one or more risk-based industrial screening levels and may require appropriate disposal or mitigation. The top 18 inches of soil will be utilized as berm material at the adjacent WPCF and capped or appropriately disposed of in accordance with state and federal regulations. In addition to this soil, engineered fill will be required beneath portions of the foundations for several of the heavier pieces of equipment to a depth of approximately 5 feet bgs. Depending on the results of additional sampling and analyses proposed in this Workplan and contingent on DTSC approval, should the soil in the deeper footings also exceed risk-based screening levels and require mitigation, this soil also will potentially be capped and used as berm material, or appropriately disposed in accordance with state and federal regulations. 5.1.2 Site Safety Plan Stantec will prepare a Site Safety Plan (SSP) for site-specific conditions and scope of work as required by the Occupational Health and Safety Administration (OSHA) standard guidelines (29 CFR 1910.120), and by California Occupational Health and Safety Administration (Cal OSHA) guidelines (CCR Title 8, Section 5192). Prior to the commencement of the field investigation, the SSP will be updated with appropriate field personnel and subcontractor information. The field staff and contractors will review and sign the SSP before beginning field operations at the Site. The SSP has been prepared as a stand-alone document, and is included with this Workplan (Appendix C). 5.1.3 Permitting The investigation will require acquisition of soil boring permits from San Joaquin County Environmental Health Department (SJCEHD) prior to the commencement of drilling activities. If a current Master File Record Form (MFRF) for the Site is not on file with SJCEHD, Stantec will complete the required form on behalf of the City. Stantec will also complete and submit the boring permit application, the MFRF, a copy of the DTSC work plan-approval letter, along with permit and MFRF fees to the SJCEHD. Stantec will also coordinate with SJCEHD to schedule the boring grout inspection and pay for additional grouting inspection fees if required. PEA WP-Lodi 9 August 13,2009