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Working To Restore Nature <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Phone: (209) 838-3507 <br /> FAX: (209) 838-3509 i ,{ + �s rel 8, 1993 <br /> •c?x <br /> Ms. Linda Turkatte APR 12 1993 <br /> San Joaquin County Public Health Services ENVIRONMENTAL HEALTH <br /> Environmental Health Division PERMIT/SERVICES <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> RE: Workplan for Soil Excavation, 11th Street, Tracy, CA <br /> Dear Ms. Turkatte: <br /> This letter will serve as a Workplan for soil excavation to be conducted at the above referenced <br /> site. Petroleum hydrocarbon impacted soils were encountered during road construction activities <br /> on April 16, 1993. The impacted area was immediately backfilled. Based upon the fact that <br /> petroleum hydrocarbon contamination was left in place, RESNA Industries, on behalf of the City <br /> of Tracy, proposes the removal of the impacted soil. <br /> The following scope of work will be performed under the supervision of RESNA personnel in <br /> accordance with the Site Safety and Health Plan (Attachment 1). <br /> To prevent residual petroleum hydrocarbon contaminants in the soil from acting as a possible <br /> source of degradation to the groundwater, impacted soil will be excavated. A Photoionization <br /> Detector (PID) will be used during excavation to assist in evaluating the lateral extent of soil <br /> impaction. Excavated soil will be underlain and 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 under direction of San Joaquin County <br /> Environmental Health Division. <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 /> WP0493.MRM <br />