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Ap* -27-98 04 : 21P GHH En�-ieeriny Inc <br /> • P-03 <br /> h <br /> • Soil samples front the US'r excavation were collected using the excavator bucket. Dispenser and <br /> product line Samples were collected at the bottom of their pipe wenches. ,he 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 (COCj 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 (*PYH G; EPA <br /> Method 8015M), benzene, toluene,ethylbenzenc, toluene,and xylenes (BTEX; EPA Method <br /> 8020), methyl-tert-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 methyl-cert-butyl-ether <br /> (DIPS. ETBE,TAME,TBA. MTBE: EPA Method 8260). Diesel tattle 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 /> summarized in Tables 1, 2,3 and 4. Laboratory results and COC documentation are includctl as <br /> Attachment A. <br /> Soil sample analytical data indicates that some TPH G impacted soil was left on-site. The UST's <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 /> (� <br /> Vern A. Bennett <br /> Project Manager <br /> Richard J. ip <br /> Principal Hydrogeologist <br /> FA5007.1 l\K WNna)\Sample.apt <br /> Attachment's) <br /> PC Ms. Letisha Hriggs, San Joaquin County <br /> • <br />