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4k y <br /> KAPREALIAN ENGINEERING l <br /> . 1 N C 0 R P 0 R A T E D APR 181995 <br /> ENVIRONMENTRL Hr:P JH <br /> PERMIT/SERVICES <br /> KEI-P92-0205.R7 <br /> April 10, 1995 <br /> Unocal Corporation <br /> 2000 Crow Canyon Place, Suite 400 <br /> P.O. Box 5155 <br /> San Ramon, California 94583 <br /> Attention: Mr. Robert A. Boust <br /> RE: Stockpiled Soil Disposal Report <br /> Former Unocal Bulk Plant #0950 <br /> 2835 Navy Drive <br /> Stockton California <br /> Dear Mr. Boust: <br /> This report summarizes the analytical results of the composite soil <br /> sample that was collected from the stockpiled soil at the refer- <br /> enced site. The soil analyses were conducted to comply with the <br /> local regulatory agency requirements for proper disposal of <br /> • potentially contaminated soil. <br /> On January 17, 1995 , a composite soil sample was collected from <br /> approximately 2 5 cubic yards of stockpiled soil (designated as <br /> Comp S1 on the attached Figure 1) that was generated during the <br /> destruction of seven monitoring wells. The sample (represented by <br /> Comp S1) was collected to determine proper disposal of the soil. <br /> The composite sample consisted of four individual grab samples <br /> collected at various locations and at depths of approximately 2 <br /> feet into the stockpile. The samples were collected in two-inch <br /> diameter, clean brass tubes that were then sealed with Teflon-lined <br /> plastic caps and placed in a cooled ice chest for subsequent <br /> delivery to a certified laboratory for analysis. The individual <br /> samples were subsequently composited and analyzed by Sequoia <br /> Analytical Laboratory in Concord, California, and were accompanied <br /> by properly executed Chain of Custody documentation <br /> The composite soil sample (Comp 51) was analyzed to determine <br /> concentrations of total purgeable petroleum hydrocarbons (TPH) as <br /> gasoline by EPA 3550/modified 8015, TPH as diesel by EPA method <br /> 3550/modified 8015, benzene, toluene, ethylbenzene, and xylenes by <br /> EPA method 8020 , and organic lead by the DHS LUFT method. The <br /> results of the composite sail sample analyses are summarized in <br /> Table 1 . Copies of the laboratory analyses sheets and the Chain of <br /> Custody documentation are attached to this report. <br /> • Based on the analytical results of the composite soil sample, the <br /> stockpiled soil was profiled for disposal to Redwood Landfill, <br /> 2v01 Smn%ell Drive,Su,Le 400 <br /> Concord,California 94520 <br /> Tel 510 602 5100 Fax 510 687 0602 <br />