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Workplan for Soil Excavation <br /> City of Tracy <br /> 11th Street, Tracy, CA <br /> Page 2 <br /> Excavation and Sampling <br /> Non-hazardous petroleum hydrocarbon impacted soil encountered during road construction <br /> activities above the water table will be excavated to subgrade as specified for the road <br /> improvements (as previously approved for Schulte and Corral Hollow Roads). A <br /> Photoionization Detector (PID) will be used during excavation to assist in evaluating the lateral <br /> extent of soil impaction. RESNA proposes to load excavated soil directly into trucks for <br /> transport to the City's Land Treatment Facility (LTF) located at the Tracy Municipal Airport <br /> (Figure 3). The soil will be placed into the existing treatment cells at the LTF, underlain and <br /> covered with plastic sheeting. <br /> Following excavation, confirmation sidewall samples will be collected at 20 foot intervals. At <br /> least one sample will be collected from the floor of the excavation. The exact number and <br /> locations of the samples will be determined in the field. <br /> All verification soil samples will be collected and transported in accordance with RESNA's <br /> Quality Assurance/Quality Control Plan (Attachment 2). The soil will be collected into <br /> prewashed brass liners. Each liner will be sealed with a Teflon sheet and plastic caps, sealed <br /> in air-tight bags, and preserved on ice pending shipment to a State-certified laboratory. <br /> Laboratory Analysis <br /> Soil samples will be transported using chain-of-custody documentation to the laboratory for <br /> analysis. Based upon field observations and any known history of the site (i.e., previous <br /> business operations, underground fuel storage tanks, or vicinity of oil pipeline), the samples will <br /> be submitted for one or more of the following analyses: benzene, toluene, ethylbenzene, and <br /> xylenes (BTEX) by EPA method 8020, total petroleum hydrocarbons as gasoline (TPHG) by <br /> EPA method 8015, total petroleum hydrocarbons as diesel (TPHD) by EPA method 8015, and/or <br /> total oil and grease (TOG) by SM5520 E/F. <br /> Samples will be collected from stockpiled soil and analyzed for petroleum hydrocarbons by the <br /> methods described above. One 4-sleeve composite sample will be collected per 100 cubic yards <br /> of stockpiled soil. <br /> Remedial Methodology <br /> Subsequent to receipt of analytical results, the soil will be treated and/or utilized in accordance <br /> with Work Plan for Soil Remediation, City of Tracy, Tracy Airport Land Treatment Facility, <br /> Tracy, California (RESNA Industries, August 4, 1992). RESNA's August 1992 Work Plan <br /> proposes to: <br /> WPo42793.FNL <br />