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Time Oil 2 <br /> 14000 East Highway 88,Lockeford,Califumia May 27, 1998 <br /> One vapor sample was collected from each of the extraction wells near the end of each <br /> respective test Samples were analyzed for Total Petroleum Hydrocarbons calculated as <br /> gasoline (TPH-g), benzene, toluene, ethylbenzene, and xylenes (BTEX compounds) by EPA <br /> Methods 8015 and 8020 Results of these analyses are presented in Table 9 Certified <br /> analytical reports and chain-of-custody documentation data are presented as Attachment A <br /> 'gest Summary <br /> Due to the low oxygen content in the subsurface, the ICE was unable to produce a vacuum of <br /> greater than 4 inches of water column on any test well, therefore, no induced vacuum <br /> readings were identified in surrounding wells However, based on the flow rates achieved <br /> during testing, the lithology of the site, and data collected during previous investigations, <br /> SECOR estimates the radius of influence at the site to be 50 feet (Pedersen and Curtis, 1991, <br /> & Peargin and Mohr, 1995) <br /> Initial expected TPH-g mass removal rates were calculated using the average flow rate <br /> observed during SVE testing and lab analysis of vapor samples taken near the end of each <br /> test Summarized below is the estimated effective radius of influence for each of the test <br /> wells and the expected initial mass removal rates Calculations for mass removal rates are <br /> presented as Attachment B <br /> • <br /> Estimated Effective Radius TPH-g Removal Rate <br /> SVE Test Well of Influence feet) (Eounds per da <br /> W-1 50 38 <br /> W-2 50 365 <br /> W-3 50 1,425 <br /> W-4 50 17 1 <br /> W-5 50 24 <br /> W-6 50 1 1 <br /> W-7 50 209 <br /> W-8 50 175 <br /> Soil Vapor Extraction Test- W-1 <br /> o The maximum applied vacuum and resulting air flow achieved at Well W-1 <br /> were 2 inches of water column and 12 5 cubic feet per minute (cfm), <br /> respectively <br /> 7G005-001-0111NFLTEST <br />