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ENV00"'IME'N'TAL HEALTH <br /> jT <br /> pf <br /> iJ J <br /> 3330 Data Drive <br /> Deft A& 93 NOV "3 R�"1+ (;; 3�uite 100 <br /> Environnmu al ancho Cordova.CA 95670 <br /> Consultants,Inc. 916/638-2085 <br /> FAX:916/638-8385 <br /> October 22, 1993 <br /> Mr. Kenneth Earnest <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford, California 93230 <br /> Subject: Soil Management and Sampling Plan <br /> Beacon Station No. 695 <br /> 900 South Cherokee Lane <br /> Lodi, California <br /> Delta Project No. 40-93-915 <br /> Dear Mr. Earnest: <br /> Delta Environmental Consultants, Inc. (Delta), has been authorized by Ultramar Inc. (Ultramar) to <br /> assist with the management and sampling of soil during the replacement of underground storage tanks <br /> at Beacon Station No. 695, located at 900 South Cherokee Lane, Lodi, San Joaquin County, <br /> California. The purpose of this letter is to provide a plan for the disposal of excavated soil,to notify <br /> San Joaquin County that overexcavation work may take place, and to present a plan for the collection <br /> of soil samples from the excavations and stockpiles. The location of the site is shown in Figure 1 <br /> and a site map is included as Figure 2. <br /> Project Rad=und <br /> There are currently four underground fuel storage tanks at the site, including three 20,000 gallon <br /> storage tanks which contain regular unleaded, plus unleaded, and premium unleaded gasoline, and <br /> one 20,000 gallon tank which contains diesel fuel. There are 24 ground water monitoring and/or soil <br /> vapor extraction wells at the site. A soil vapor extraction system began operating at the site in <br /> July 1991. <br /> Soil Management <br /> A Delta representative will be on-site to supervise the segregation of excavated soil and to collect soil <br /> samples. During removal of the existing tanks and lines, excavated soil will be monitored with a <br /> photoionization detector (PID). Excavated soil will be segregated into stockpiles based on the <br /> presence or absence of petroleum hydrocarbons, as determined by the PID readings and subjective <br /> analysis. Native soil which contains petroleum hydrocarbons may be overexcavated if feasible. Soil <br /> stockpiles will be covered with plastic at the end of each day. <br /> Soil which is acceptable to the Sacramento County Landfill will be transported to that facility for <br /> disposable, other soil will be transported to the Forward Inc. landfill in Stockton, California. <br /> Soil Sampling <br /> After removal of the existing tanks and lines,soil samples will be collected from approximately 2 feet <br /> below the backfill/native soil interface at each end and the center of each former tank location. One <br /> Delta Delivers Solutions <br />