SITE INFORMATION AND CORRESPONDENCE

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APR 03 '93 12=11PM 209 838 3509 P.2 Working To Restore Nature 1710 Main Street Escalon, CA 95320 Phone: (209) 838-3507 April 8, 1993 FAX: (209) 838-3509 Ms. Linda Turkatte San Joaquin County Public Health Services Environmental Health Division P.O. Box 2009 Stockton, CA 95201 P,E: Workplan for Soil Excavation, 11th Street, 'Tracy, CA Dear Ms. Turkatte: This letter will wrrve as a"Workplan for soil excavation to be conducted at the above referenced site. Petroleum hydrocarbon impacted soils were encountered during mad construction activities on April 16, 1993. The impacted area was immediately backfilled. Eased upon the fact that petroleum hydrocarbon contamination was left in place, RESNA Industries,on behalf of the City of Tracy, proposes the removal of the impacted sail. The following scope of work will be performed under the supervision of RESNA personnel in accordance with the Site Safety and Health Plan (Attachment 1). To prevent residual petroleum hydrocarbon contaminants in the soil from acting as a possible source of degradation to the groundwater, impacted soil will be excavated. A Photoionisation Detector (PID) will he used during excavation to assist in evaluating the lateral extent of soil impaction. Excavated soil will be underlain and covered with plastic sheeting. Following excavation, confirmation sidewall samples will be collected at 20 foot intervals. At least one sample will be collected from the floor of the excavation. The exact number and locations of the samples will be determined in the field under direction of San Joaquin County Environmental Health Division. All verification soil samples will be collected and transported in accordance with RESNA's Quality Assurance/Quality Control Plan (Attachment 2). The soil will be collected into prewashed brass liners. Each liner will be sealed with a Teflon sheet and plastic caps, sealed in air-tight bags, and preserved on We pending shipment to a State-c=dfied laboratory. W PM'*.MRM