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KAPREALIAN ENGINEERING <br /> I N C 0 R P 0 R A T E D <br /> KEI-P88-1013 .R3 <br /> August 31, 1994 <br /> Unocal Corporation <br /> 2000 Crow Canyon Place, Suite 400 <br /> P.O. Box 5155 <br /> San Ramon, California 94583 <br /> Attention: Ms. Tina Berry <br /> RE: Drill Cutting Disposal for F�Idlp R �a <br /> Unocal Service Station #5098 SE <br /> 5606 Pacific Avenue 1��� <br /> Stockton, California <br /> ENVIRONMENTAL HEALTH <br /> Dear Ms . Berry, <br /> HERMIT/SERVICE'S <br /> This report summarizes the analytical results of the composite soil <br /> sample that was collected from the drill cutting soil at the <br /> referenced site. The soil analyses were conducted to comply with <br /> the local regulatory agency requirements for proper disposal of <br /> potentially contaminated soil <br /> On July 14 , 1994 , soil samples from approximately 2 5 cubic yards <br /> of soil (nine drums) that had been generated during the installa- <br /> tion of monitoring wells were collected to determine proper <br /> disposal of the soil. One composite soil sample (designated as <br /> Comp S1) was collected. The composite sample consisted of four <br /> individual grab samples partly collected from each drum at depths <br /> of approximately I foot into each drum The individual samples <br /> were collected in two-inch diameter, clean brass tubes, which were <br /> then sealed with aluminum foil, plastic caps and tape, and placed <br /> in a cooled ice chest for subsequent delivery to a certified <br /> laboratory for analysis. The composite sample was analyzed by <br /> Sequoia Analytical Laboratory in Concord, California, and was <br /> accompanied by properly executed Chain of Custody documentation. <br /> The composite soil sample was analyzed to determine concentrations <br /> of total petroleum hydrocarbons (TPH) as gasoline by EPA method <br /> 5030/modified 8015 , benzene, toluene, ethylbenzene and xylenes <br /> (BTEX) by EPA method 8020, total threshold limit concentrations <br /> (TTLC) of lead. The results of the soil analyses are summarized in <br /> Table 1. Copies of the laboratory analyses and the Chain of <br /> Custody documentation are attached to this report. <br /> Based on the analytical results of the composite soil sample, <br /> approximately 2 . 5 cubic yards of soil, represented by sample Comp <br /> $1, were profiled for disposal to Forward, Inc. in Stockton, <br /> California (an approved Class II/III treatment and disposal, <br /> 2401 Stanwell Drive,Suite 400 <br /> Concord,California 94520 <br /> Tel 510 602 5100 Fax 510 687 0602 <br />