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• Mr. George Takemori Project 20F90-002.007 <br /> May 11, 1999 <br /> Page 3 <br /> Confirmation soil samples were collected directly from a backhoe bucket. Pinnacle <br /> directed the backhoe operator to remove soil from the bottom of the UST excavations <br /> and from beneath the dispenser locations and product lines. The upper 6 inches of <br /> material within the bucket was removed, and a brass sample tube was driven into the <br /> soil. The sample tube was sealed with Teflon tape and plastic end caps, and labeled <br /> with project, sample designation, and sampling date. <br /> Confirmation samples collected beneath Tank #5 and #6 were analyzed for total <br /> petroleum hydrocarbons as gasoline (TPHG) and total petroleum hydrocarbons as diesel <br /> (TPHD) using CA/LUFT, and benzene, toluene, ethylbenzene, total xylenes (BTEX) <br /> using USEPA Method 8020, as required by the SJCPHS/EHD. <br /> Samples collected from beneath Tank #8, the dispensers, and product lines were <br /> analyzed for TPHG, TPHD, BTEX, and fuel oxygenates (tert-butyl alcohol [TBA], <br /> methyl tert-butyl ether [MTBE], di-isopropyl ether [DIPS], ethyl tert-butyl ether <br /> [ETBE], and tert-amyl methyl ether [TAME]) using USEPA Method 8260, as required <br /> . by the SJCPHS/EHD. <br /> Under the direction of the SJCPHS/EHD, Pinnacle collected twenty-four stockpiled soil <br /> samples from the soil excavated from the UST complex and dispensers. Samples were <br /> composited 2:1 by the laboratory for analysis for TPHG, TPHD, BTEX, and fuel <br /> oxygenates. <br /> Samples were placed in a cooler with ice and transported to Columbia Analytical <br /> Services (CAS) Inc., of Santa Clara, California, a state-certified laboratory, with <br /> appropriate chain-of-custody documentation. <br /> SOIL SAMPLING RESULTS <br /> This section presents the results of the soil sampling from the USTs, dispensers, product <br /> lines, and stockpiled soil. Laboratory results are presented in Table 1. Certified <br /> analytical reports and chain of custody documentation are presented in Appendix A. <br /> UST Sample Results <br /> All parameters (TPHG, TPHD, BTEX, and fuel oxygenates) were below method <br /> . detection limits for the samples analyzed. <br /> CP\E:\TEiCHERTISTOCKTONIREPORTSISTKNP101.DOC-991sg:1 f <br /> Rev.0,5/11/99 <br />