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r. McClelland engineers 9 inc. MAY 2 0 188 2140 Eastman Avenue,Ventura,California 93003, ENVIROMENTAL HEAL f H Tel.(805)644-5535,Telex:659241 FERMIT/SERVICLS May 23, 1988 P.N. 0588-1603 Environmental Health Division San Joaquin Local Health District 1601 East Hazelton Avenue Stockton, CA 95201 Attention: David Carls Additional Proposed Boring Locations Former Tillie Lewis Foods Cannery Stockton, California As per our telephone conversation on May 23, 1988, we have prepared this assessment plan to further evaluate the nature and extent of soil contamina- tion in selected locations at the project site. Preliminary assessment plans for soil and groundwater contamination were provided in our letters dated March 4 and March 9, 1988, respectively. The site assessment report for soil and groundwater contamination was provided in our report dated May 20, 1988. To further evaluate the extent of soil contamination, McClelland pro- poses to complete up to three borings as shown in Plate 1. Our services will include the following: 1. Drill borings to a depth of up to 40 feet below ground surface. Undisturbed soil samples will be collected at 5-foot intervals using a California Liner sampler. Prior to each sampling attempt, the sampler and sample liners will be steam cleaned. Soil cuttings will be containerized on site in 55-gallon DOT drums. Upon termination, the borings will be backfilled with grout using the tremie method or by placement through the hollow stem auger. The grout will consist of a cement-bentonite grout or cement-sand mix. 2. All soil samples will be field screened for volatile organics using a photoionization detector (PID) . Those samples that show positive readings of organic gases will be analyzed for total petroleum hydrocarbons by EPA method 418.1 (IR technique) .