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Stantec <br /> PEA WORKPLAN <br /> Proposed Lodi Energy Center Site <br /> Lodi, California <br /> 5.6.1 Soil <br /> As discussed above, the top 18 inches of soil is unusable for geotechnical considerations and <br /> exceeds one or more risk-base screening levels. In addition to the samples described below, <br /> soil samples will be collected at depths of 0.5 to 1.0 feet bgs in four of the 20 proposed sampling <br /> locations in the northern part of the Site. A shallow sample (approximately 2 ft bgs) and a <br /> deeper soil sample (approximately 6 feet bgs) will also be analyzed from each of the 20 <br /> sampling locations. Additional supplemental or contingency soil samples will also be collected <br /> from approximately 4 feet bgs, and will be analyzed based on the results of the initial round of <br /> analytical results. This will further characterize impacted soils, thereby providing additional <br /> analytical data to facilitate minimizing the amount of soils below risk-based levels that may need <br /> mitigation. These additional samples will be analyzed for constituents based on the analytical <br /> results of the shallow samples. <br /> Soil samples will be analyzed for constituents in accordance with the following analytical <br /> methods. At least two soil samples per soil boring (for a total of 42 samples including five <br /> percent (two) QA/QC samples will be analyzed with the methods listed below. The additional <br /> contingency samples will be analyzed for constituents based on the analytical results of the 2- <br /> and 6-foot bgs samples. <br /> • Volatile Organic Compounds (VOCs) by EPA Methods 5035 and 82606 — a subset of <br /> four 2-foot bgs soil samples from among the 20 proposed soil boring locations will be <br /> selected. <br /> • Polycyclic Aromatic Hydrocarbons (PAHs) by EPA Method 8270C — all proposed soil <br /> samples will be analyzed. <br /> • Organochlorine Pesticides (OCPs) by EPA Method 8081A — all proposed soil samples <br /> will be analyzed. <br /> • Title 22 Metals (CAM 17) by EPA Method 60106, 6020, and 7471A — all proposed soil <br /> samples will be analyzed. <br /> • Total Petroleum Hydrocarbons (TPH) quantified as gasoline, diesel and motor oil by <br /> EPA Method 82606 or 8015M (as appropriate) —all proposed soil samples (48 samples) <br /> will be analyzed. <br /> In accordance with Section 2.4.2.5 of the PEA Manual, the background samples will be <br /> analyzed for PAHs and CAM 17 metals by the above methods. <br /> 5.6.2 Groundwater <br /> The one proposed groundwater sample to be collected from WSM-3 will be analyzed for PAHs, <br /> OCPs, and CAM 17 metals. <br /> 5.7 SAMPLE HANDLING PROCEDURES <br /> Procedures for sample handling including sample containers, decontamination, chain of <br /> custody, and field documentation are described in the attached SAP (Appendix D). <br /> PFA WP-Lodi 12 August 13,2009 <br />