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Mr. Kenneth Earnest <br /> Ultramar Inc. <br />• February 3, 1995 <br /> Page 2 <br /> Soil ManaLyernent <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 Biolndustries, Inc. in Red Bluff, California. <br /> Soil Samuling <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 /> soil sample will be collected from beneath the former distribution lines for each 20 linear feet of <br /> piping, and one soil sample will be collected from beneath each of the former product dispensers. <br /> Additional soil samples may be collected from overexcavated trenches by Delta at the discretion of <br /> . the San Joaquin County representative at the site. Four soil samples will be collected from each <br /> 50 cubic yards of stockpiled soil, with each set of four samples to be composited in the laboratory <br /> prior to analysis. Soil samples will be collected in 2-inch diameter by 6-inch long brass tubes, which <br /> will be sealed with Teflon tape and plastic caps. The samples will be stored in an ice chest cooled <br /> to 4°C for transport to the laboratory. <br /> Soil samples will be submitted to a state-certified laboratory for analysis of benzene, toluene, <br /> ethylbenzene, xylenes, and TPH as gasoline. The samples will be analyzed using methods approved <br /> by the U.S. Environmental Protection Agency and the California Department of Health Services. <br /> Remarks/Signatures <br /> Delta recommends that a copy of this letter be forwarded to: <br /> Mr. Harlin Knoll Mr. James B. Maughan <br /> Environmental Health Division California Regional Water <br /> Public Health Services Quality Control Board, <br /> San Joaquin County Central Valley Region <br /> 1601 East Hazelton Avenue 3443 Routier Road <br /> Stockton, California, 95201 Sacramento, California 95827 <br />