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r 2✓ <br /> J �1�J <br /> KAPREALIAN ENGINEERING <br /> I N C 0 R P 0 R A T E 0 <br /> KEI-P92-0205 .R2 <br /> December 1, 1992 <br /> Unocal Corporation <br /> 2000 Crow Canyon Place, Suite 400 <br /> P.O. Box 5155 <br /> San Ramon, California 94583 , <br /> Attention: Mr. Bob Boust <br /> RE: Stockpiled Soil Sampling pEC 1 <br /> and Disposal for ENVIROINNIENTAL mN f,�,��i <br /> Unocal Bulk Plant #0950M�TjC�Va <br /> 2835 Navy Drive <br /> Stockton California <br /> Dear Mr. Boust: <br /> This letter report summarizes the analytical results of the <br /> composite soil samples that were collected from the stockpiled soil <br /> at the referenced site. The soil analyses were conducted to comply <br /> with the local regulatory agency requirements for proper disposal <br /> of potentially contaminated soil . <br /> On April 22 , 1992 , soil samples from approximately 80 cubic yards <br /> of stockpiled soil that had been excavated from the diesel fuel <br /> tank pit were collected to determine proper disposal of the soil. <br /> Three composite soil samples (designated as Comp A, Camp B, and <br /> Comp C) were taken. Each composite sample consisted of four <br /> individual grab samples taken at various locations and at depths of <br /> approximately 2 feet into the stockpile. The individual samples <br /> were subsequently composited as one sample by the lab. The 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. All samples were analyzed at Sequoia <br /> Analytical Laboratory in Concord, California, and were accompanied <br /> by properly executed Chain of Custody documentation. Sample point <br /> locations are as shown on the attached Site Plan, Figure 1. <br /> On April 29 , 1992 , Kaprealian Engineering, Inc. (KEI) returned to <br /> the site to collect soil samples from approximately 100 additional <br /> cubic yards of stockpiled soil that had been excavated from diesel <br /> fuel tank pit. Four composite sample (designated as Comp D, Comp <br /> E, Comp F, and Comp G) were collected and stored as described <br /> above. Sample point locations are as shown on the attached Site <br /> Plan, Figure 1. <br /> On July 30, 1992 , KEI returned to the site to collect soil samples <br /> from approximately 75 cubic yards of stockpiled soil that had been <br /> 2,401 5,wnaell Doti. tiwl( 400 <br /> Concord California 94520 <br /> TO 5 3 0 01)2 5100 Fax 510M70002 <br />