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1� y <br /> a <br /> e <br /> • 13 May 2004 <br /> AGE-NC Project No 97-0290 <br /> Page 3 of 5 <br /> 2 4 SOIL-VAPOR SAMPLING AND ANALYSIS <br /> A set of soil-vapor samples were collected from the carbon-adsorption soil vapor extraction system <br /> on 27 October, 18 November and 30 December 2003 The soil-vapor samples were collected In <br /> Tedlar vapor bags using a vacuum pump attached to the Influent and effluent stream The samples <br /> were labeled,placed In a pre-chilled cooler and transported under chain-of-custody to McCampbell <br /> Analytical Inc(MAI),a Callforrlla DHS-certified laboratory In Pacheco The samples were analyzed <br /> for <br /> • TPH-g in accordance with EPA Methods 8015CM and <br /> • BTEX and MTBE In accordance with EPA Method 8021B <br /> 3.0. FINDINGS <br /> Ground water elevation, flow direction and gradient were undeterminable this quarter, the <br /> contaminant Impact to ground water was quantified from the ground water laboratory data <br /> From field and laboratory data collected at the SVE remediation system on three events this quarter, <br /> AGE determined the average TPH-g concentration, the average flow rate and calculated the <br /> approximate mass and volume of hydrocarbons removed <br /> 3 1 ANALYTICAL RESULTS OF WATER SAMPLES <br /> TPH-g was detected in the water sample collected from well MW-2 at a concentration of 4,200 µg/l <br /> micrograms per liter(�tg/l) BTEX compounds were detected at concentrations of 210 µg/1 benzene, <br /> 25 gg/l toluene, 86 gg/1 ethylbenzene and 290 Ag/l xylenes <br /> The fuel additive MTBE was not detected Analytical results of the water samples collected at the <br /> site are summanzed on Tables 2 and 3 The laboratory report (CTEL Project No CT214-0310168), <br /> chain-of-custody forms and quality assurance and quality control (QA/QC) reports are Included in <br /> Appendix B <br /> • <br /> Advanced GeoEnvironmental,Inc <br />