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I12 July 2006 <br /> AGE-NC Project No 95-0130 <br />' Page 5 of 14 <br /> GeoTracker confirmation pages ofthe submitted laboratory electronic deliverable format(EDF)files <br /> and depth to water measurements are included in Appendix C <br /> 3.0. INTERIM SOIL VAPOR EXTRACTION REMEDIATION <br /> Between 07 December 2005 and 14 March 2006, an SVE remediation system was continuously <br /> operated at the site, utilizing an electric catalytic oxidizer SVE system to selectively apply an <br /> induced vacuum to wells VW-1 (A and B), VW-213 and VW-313 SVE procedures for the site were <br /> described in the AGE-prepared Interim Remediation Work Plan, dated 21 May 2003,and approved <br /> by the SJCEHD by letter dated 10 June 2003 <br /> 3 1 REMEDIATION SYSTEM PROCEDURES <br /> The SVE system utilized a manifold network of two-inch diameter, Schedule 40 PVC piping <br /> installed underground from SVE wells VW-1 through VW-3 to the inlet of the SVE remediation <br /> system The SVE remediation system consists of a Solleco Ecat 250 catalytic oxidizer vapor <br /> I • recovery system <br />' In order to monitor efficiency of the SVE system, l)a Magnehelic vacuum gauge and Dwyer DS-200 <br /> differential pressure sensor was installed prior to the inlet of the SVE unit so that air flow rate is <br /> monitored, the flow rate was determined from the measured differential pressure and the piping <br /> I diameter using a nomograph(Appendix D),2)SVE air flow ofthe influent and effluent streams were <br /> monitored routinely for the presence of organic vapor using an organic vapor analyzer (OVA) <br /> equipped with a photo-ionization detector(PID Thermo Environmental 580B, 10 0 eV, calibrated <br /> to isobutylene), and 3) influent and effluent air flow vapor stream samples were collected from <br /> sampling ports installed upstream(influent)of the vacuum blower and downstream(effluent)of the <br /> catalytic oxidizer and submitted for laboratory analysis Analytical results of SVE air flow samples <br /> I are summarized in Table 5, field measurements were recorded at regular intervals and are <br /> summarized in Table 6 <br /> I Between 07 December 2005 and 14 March 2006,an induced vacuum was selectively applied to SVE <br /> wells VW-1 (A and B), VW-2A and VW-3A to extract hydrocarbon vapor from the subsurface <br /> (Table 6) <br /> 32 COLLECTION AND ANALYSIS OF VAPOR EXTRACTION AIR FLOW SAMPLES <br /> A total of three sets of extracted air flow vapor samples were collected on 04 January, 07 February <br /> . p p rY <br /> Advanced GeoEnvironmcntai,Inc <br />