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Apr-27-98 04: 21P GHH Enaineering Inc P.03 <br /> ... .W/ <br /> Soil samples from the UST excavation were collected using the excavator bucket. Dispenser and <br /> product line samples were collected at the bottom of their pipe trenches. The soil samples were <br /> collected in 6-inch long. 2-inch diameter brass tubes: sealed with plastic end caps and Teflon tape; <br /> labeled in accordance with EPA protocol; recorded on a chain-of-custody ((:O(.) foam: stored in <br /> a pre-cooled ice chest at 4" degrees Centigrade; and shipped to Sierra Laboratories (Siena), a <br /> California certified analytical laboratory for analysis. Strict COC protocol was maintained <br /> throughout the sample handling process. <br /> All samples were analyzed for total petroleum hydrocarbons in the gasoline range CYPH G; EPA <br /> Method 8015M), benzene, toluene,ethylbenzene, toluene,and xylenes (BTEX; EPA Mcth(d <br /> 8020), methyl-ten-butyl-ether(MTBE; EPA Method 8020) and lead(EPA Method 6010). <br /> Selected soil samples were also analyzed for the gasoline oxygenates di-isopropyl ether,ethyl <br /> tertiary butyl ether, tertiary amyl methyl ether, tertiary butyl alcohol and inethyl-cert-butyl-ether <br /> (DIPS, ETBE,TAME.TBA, MTBE: EPA Method 8260). Diesel tank samples,dispenser sample <br /> D-7 and product line samples P-5 and P-6 were analyzed for total petroleum hydrocarbons in the <br /> diesel range (TPH D; EPA Method 8015M) in the place of TPH G. Soil sample results are <br /> sumntttrized in Tables 1, 2,3 and 4. Laboratory results and COC documentation are included as <br /> Attachment A. <br /> Soil sample analytical data indicates dial soma:TPH G impacted soil was left on-site. The USTs <br /> and associated piping were replaced and the excavations backfilled following approval by the <br /> County representative. <br /> If you have any questions or need additional information,please call the undersigned at (916) <br /> 723-7645. <br /> Thank you, <br /> Vern A. Bennett <br /> Project Manager <br /> 104 <br /> Richard 1. iZ p <br /> Principal Hydrogeologist <br /> F:\5007.1 I\KW-na% ample.rpt <br /> Attachment(s) <br /> PC Ms. Lelisha Briggs, San Joaquin County <br />