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1 26 October 2004 AGE-NC Project No 97-0290 ' Page 4 of 6 32 ANALYTICAL RESULTS OF WATER SAMPLES 1 TPH-g was detected in the water samples collected from wells MW-2 and MW-4 at a concentrations ' of 730 micrograms per liter (µg/1) and 540 µg/l, respectively BTEX compounds were detected in the sample from well MW-2 at concentrations of 130 µ.g/1 benzene,no detection of toluene, 73 gg/l ethylbenzene and 65 gg/l xylenes The fuel additive MTBE was not detected Analytical results of ' the water samples collected at the site are summarized in Tables 3 and 4 The laboratory report (CTEL Project No CT214-0409073), chain of custody form and quality assurance/quality control (QA/QC) report are included in Appendix C 1 33 ANALYTICAL RESULTS OF SOIL-VAPOR SAMPLES ' The carbon-SVE unit operated continually,24 hours a day,during the observation period Extraction flow rates measured were as great as 49 scfm until September when they were measured at 63 scfm ' An induced vacuum (negative pressure) of up to 26 inches of water was measured in the piping between the SVE blower and extraction wells (Table 5) Hydrocarbon concentrations detected in soil-vapor samples are as reported below ' • The influent soil-vapor sample collected on 15 January contained detectable concentrations of TPH-g at 500 µg/1 and BTEX compounds at 0 34 µg/1 benzene, 2 0 µg/1 toluene, 1 5 µg/1 ethylbenzene and 21 µg/1 total xylenes MTBE was not detected ' a The influent soil-vapor sample collected on 23 February contained a detectable concentration of TPH-g at 310 µg/1 BTEX compounds and MTBE were not detected ' • The influent soil-vapor sample collected on 24 March contained a detectable concentration of TPH-g at 270 µg/1 BTEX compounds and MTBE were not detected • The influent soil-vapor sample collected on 28 April contained a detectable concentration ' of TPH-g at 210 µg/1 and the BTEX compound xylene was detected at 2 0 µg/1 Other BTEX compounds and MTBE were not detected ' • The influent soil-vapor sample collected on 26 May contained a detectable concentration of TPH-g at 190 µg/1 BTEX compounds and MTBE were not detected ' • The influent soil-vapor sample collected on 22 June contained a detectable concentration of TPH-g at 170 gg/l BTEX compounds and MTBE were not detected • The influent soil-vapor sample collected on 22 July contained a detectable concentration of ' TPH-g at 180 µg/1 BTEX compounds and MTBE were not detected Advanced GeoEnvironmental,Inc 1