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Workplan Addendum for Sod Excavation <br /> PG&E s Stockton Service Center <br /> Page 2 <' <br /> Soil Excavation and Sampling <br /> To prevent residual contaminants in the soil from acting as a source of groundwater degradation, the <br /> soil in the vicinity of the line sump area will be excavated A backhoe will be used to excavate the <br /> area A 40-hour health and safety trained PG&E crew will perform the excavation It is estimated <br /> that 10-15 cubic yards of material will be excavated Excavated soil will be underlain and covered <br /> with plastic sheeting A Photwonization Detector {PID} will be used during excavation to assist in <br /> evaluating the lateral extent of soil impaction <br /> Following excavation, several verification samples will be collected from the excavation The <br /> samples will be collected from the sidewalls and floor of the excavation Exact number and locations <br /> of samples will be determined in the field under the direction of the San Joaquin County Public <br /> Health Services/Environmental Health Division <br /> All verification soil samples will be collected from the backhoe bucket at least three inches below <br /> the surface of the soil The samples will be collected into prewashed brass liners Each liner will <br /> be sealed with Teflon sheet and plastic caps, secured with duct tape, sealed in air-tight bags, and <br /> preserved on ice pending shipment to a state-certified laboratory <br /> Soil samples will be transported under chain-of-custody to a state-certified laboratory for analysis of <br /> total petroleum hydrocarbons as transformer oil using modified EPA method 8015 Soil sample <br /> collection and transport will be performed in accordance with the Quality Assurance and Quality <br /> Control Plan provided in Attachment 3 (Workplan for Soil Excavation, dated November 4, 1992) <br /> Report Preparation <br /> Following completion of field activities and receipt of laboratory analyses, field activities and results <br /> will be summarized in a technical report The report will include a discussion of site history, local <br /> hydrogeologic setting, field activities, and laboratory results <br /> If you have any questions or comments please contact Bill Channell at (209) 838-3507 <br /> Respectfully, <br /> RESNA Industries, Inc <br /> Lois Frantz <br /> Staff Geologist <br /> Gregory P Stahl <br /> CA Registered Geologist No 5023 <br /> Attachments <br /> PC Mr Bill Frazier, Pacific Gas & Electric Co <br /> IE rERS/WPA 0393 FNL <br />