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15 June 2004 <br /> AGE-NC Project No 95-0142 <br /> Page 2 of 12 <br /> Sampling ports were installed upstream o f 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 start up procedures and are summarized in Table 1 <br /> 2 1 1 SVE System Design and Supplemental Energy <br /> On 17 November 2003, a Solleco-manufactured EnvioPure 250 catalytic oxidizer soil-vapor <br /> extraction unit(SVE) was delivered to the site by AGE An SVE network was installed connecting <br /> wells VW-1 through VW-4,ground water extraction wells EW-1 and EW-2 and the SVE unit using <br /> 2-inch diameter schedule 40 PVC piping and 2-inch gate valves to control flow from Individual <br /> wells The piping was placed in trenches, approximately 12-inches below surface grade The two- <br /> inch networked SVE Inlet was connected to the SVE unit The influent line was routed through a 55- <br /> gallon moisture knockout vessel to a 7 5-horsepower,250-maximum standard cubic feet per minute <br /> (scfin) blower An in-line Dwyer Serres 647 in-line differential pressure transmitter (DPT) was <br /> installed in the 2 5-inch Influent line leading into the SVE catalytic oxidation unit This meter is <br /> . monitored monthly to calculated the influent rate <br /> On 18 November 2003, the electrical power source and electrical delivery lines were installed, the <br /> electrical Iine was Inspected and approved by the City of Stockton Building Department on 08 <br /> December 2003 An electrical meter was also installed by Pacific Gas and Electric on 09 December <br /> 2003 <br /> 2 1 2 SVE Start-Up <br /> The EnviroPure 250 SVE system began operation on 09 December 2003 The initiation of the SVE <br /> operation was authorized by representatives of the San Joaquin Unified Air Pollution Control <br /> District(APCD)and inspected by the EHD The SVE unit operation is conducted in accordance with <br /> APCD permit N-5011-1-0 (Appendix B) <br /> Measurement of the SVE flow rate, vacuum (potential), concentrations of the extracted soil-vapor <br /> and collection of set of soil-vapor samples were observed by the EHD personnel The samples were <br /> collected to document baseline concentrations of hydrocarbon vapor in the soil-vapor extracted by <br /> the SVE network and to determine the SVE hydrocarbon destruction rate <br /> Advanced GeoEnvironmental,Inc <br />