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08 June 2001 <br /> AGE-NC Project No 95-0137 <br /> Page 3 of 9 <br /> ' 24 LABORATORY ANALYSES OF SOIL SAMPLES <br /> Selected soil samples were analyzed for <br /> ' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Method 8015 Modified, <br /> ' • Volatile aromatic hydrocarbons- benzene, toluene, ethylbenzene and total xylenes (BTEX) <br /> and methyl tertiary butyl ether(MTBE) in accordance with EPA Method 8020, <br /> t * Oxygenating fuel additives-tertiary butyl alcohol (TBA), di-isopropyl ether(DJPE),methyl- <br /> butyl tertiary butyl ether(MTBE), ethyl tertiary butyl ether(ETBE) and tertiary amyl methyl <br /> ether(TAME) in accordance with EPA Method 8260 Modified and <br /> -- Ethylene dibromide (EDB) and 1,2 dichloroethane (1,2-DCA) in accordance with EPA <br /> Methods 8260 <br /> ' 2 5 SOIL-VAPOR EXTRACTION SYSTEM INSTALLATION <br /> On 27 November 2000, a Solleco Ecat 250 catalytic converter soil-vapor extraction unit (SVE) was <br /> delivered to the site by AGE <br /> A SVE network was installed connecting wells VW-1 through VW-11, monitoring wells MW-I and <br /> ' MW-2 to the SVE unit using 2-inch diameter schedule 40 PVC piping and 2-inch gate valves to <br /> control flow from individual wells Additionally, each IAS well was networked to the JAS unit using <br /> 1-inch diameter schedule 40 PVC piping and 1-inch gate valves to control infected air-volume to <br /> individual sparging wells The piping was placed below surface grade approximately 12 inches <br /> The two-inch networked SVE inlet was connected to the SVE unit The influent line was routed <br /> ' through a moisture knockout vessel to a 7 5-horsepower, maximum 250 standard cubic feet per <br /> minute(scfm) blower An in-line Dwyer Series 647 in-line differential pressure transmitter(DPT) <br /> was installed in the 2 5-inch influent line leading into the SVE catalytic oxidation unit This meter <br /> is monitored monthly to calculated the influent rate <br /> ' A Magnehelic vacuum gauge was attached to the inlet of the blower The air flow was monitored <br /> using a Dwyer DS-200 flow sensor The flow rate was determined from the measured differential <br /> pressure and the piping diameter using a nomograph (Appendix B) The vapor stream at the SVE <br /> ' inlet was monitored for the presence of organic vapor using an OVA <br /> Sampling ports were installed upstream of the vacuum blower inlet to recover influent soil-gas vapor <br /> ' stream samples, and downstream of the catalytic converter to recover effluent stream samples to <br /> monitor the efficiency of hydrocarbon destruction Field measurements were recorded at regular <br /> intervals throughout the pilot test and are summarized in Table 3 <br /> ' Advanced GeoEnvironmental,Inc <br />