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Chevron U.S.A. <br /> Page 6 <br /> 5.0 REMEDIAL ACTION <br /> Site activities associated with the soil remediation <br /> process commenced on January 22 , 1990. Excavation and <br /> backfill (with clean materials) continued through March 19 , <br /> 1990. Aeration of contaminated soil is ongoing. All <br /> excavated soil was segregated, based on field screening, into <br /> "clean" and "dirty" stockpiles. <br /> 5. 1 Excavation <br /> The excavation process started in the vicinity of <br /> Dispenser Island No. 1 (DI-1) . Plate 2 presents the Site <br /> Plan. The excavation associated with DI-1 was about 30 feet <br />• long by 21 feet wide and 21 feet deep (Photo 1) . The <br /> excavation was completed on January 23 , 1990. Seven soil <br /> samples were taken as specified by Mr. Harlan Knoll of San <br /> Joaquin County Health, on January 24, 1990. The sample <br /> locations are illustrated on Plate 3 . Results of analyses on <br /> the samples are summarized in Table I-A. <br />• 16000-250-044 <br /> Corrected <br /> C�`t�` s4 viu4�x� <br />