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0 2 <br /> Tracy Vacant Lot NW comer of MacArthur Drive&Valoico Road Tracy CA 212/01 <br /> • Soil Sampling and Analysis. Soil samples were collected by <br /> SECOR at 5-foot intervals using a split-spoon sampler. Four soil <br /> samples, (at depths of 5, 10, 15, and 20 feet bgs), were collected from <br /> both SB-1 and SB-2. Four samples (at depths of 2, 5, 10, and 15 feet <br /> bgs) were collected from both SB-3 and SB-4. One sample was <br /> collected at 25 feet bgs from SB-5. <br /> Soil samples collected were submitted by SECOR for chemical <br /> analyses for the presence of total petroleum hydrocarbons as gasoline <br /> (TPHg), benzene, toluene, ethylbenzene, and total xylenes (BTEX <br /> compounds), and the fuel oxygenates tert-butly alcohol (TBA), <br /> methyl-tert butyl ether (MtBE), di-isopropyl ether(DIPE), ethyl-tert- <br /> butyl ether(EtBE), tert-amyl methyl ether(TAME), methanol, <br /> ethanol, 1-2, dicloroethane (1-2 DCA) and ethylene dibromide (1,2 <br /> DBA) by Kiff Analytical from Davis, CA. Laboratory results were <br /> reported as below detection limits for all samples analyzed. <br /> Analytical results are presented as Table 1. Laboratory analytical <br /> results and chain of custody documentation are presented in <br /> Attachment B. <br /> CONCLUSIONS <br /> Analytical results of soil samples suggest that the soil explored beneath the site <br /> has not been impacted by gasoline range petroleum hydrocarbons. <br /> If there are any questions regarding the contents of this site assessment, please call us at <br /> (916) 861-0400. <br /> Sincerely, <br /> SECOR International Incorporated <br /> e L <br /> o r Hof m <br /> Project Manager <br /> Attachments: Table 1 —Soil Analytical Results <br /> Figure 1 - Site Plan <br /> Attachment A—Geotechnical Study (KEI,Dec. 4, 2000) <br /> Attachment B —Laboratory Analytical Results and <br /> Chain-of-Custody Documentation <br /> Tracy Vacant Lottsite assessment.doc <br />