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' Bridgestone/Firestone, Inc. 400 N. EI Dorado, Stockton, Califorma <br /> February 2, 1994 Site Assessment Report—RMI 207201 Page 7 of 12 <br /> with a flush mount cover set in concrete The observation well riser was <br /> terminated approximately 1-foot above the concrete, and the hole was grouted <br /> flush with the concrete surface Specific well construction details may be reviewed <br /> in the soil boring logs included in Appendix 8 4 The three borings not completed <br /> as wells were abandoned with a portland cement/bentonite slurry from total depth <br /> to surface <br /> ' 3.8 Analytical Results <br /> is <br /> As required by the California Water Quality Control Board — Central Valley Region, <br /> and in accordance with SJCEHD, soil boring samples were analyzed for <br /> ' TVPH for Gasoline Range (TPH-G) by EPA Method 8015 (CADHS) <br /> • BTEX by EPA Method 8020 <br /> • TPH by EPA Method 418 1 <br /> ' Analyses of soil samples by Method 5520 was replaced by Method 418 1 which <br /> is an acceptable method in the state of California for oil and grease when proper <br /> standards are used Specific sample preparation, extraction, and methodology used <br /> by the laboratory for 418 1 analysis is included in Appendix 8 5 <br /> The analytical results are tabled below The chain-of-custody and complete soil <br /> sample analytical results are included in Appendix 8 5 Because there was a lack <br /> of correlation between field observations and analytical results, a copy of a <br /> verification letter from the laboratory and standard, blank, and sample <br /> chromatogram's are included in Appendix 8 5 as requested by Mr Knoll <br /> RYAMMI)RpHy, INCORPORATED Denver <br /> E0Vh orinembd Coadruction Manu lAw Angebs <br /> I <br />