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1 <br /> Canepa's Car Wash <br /> September 23, 1996 <br />' Page -5- <br /> 6 0 SVE INSTRUMENTATION <br />' The PHS/EHD requested that the instrumentation necessary in the testing and operational phases of SVE <br /> operation be described The system, in Its current configuration, has no testing instrumentation The <br />' following instrumentation is recommended to monitor the system during its operation <br /> Instrumentation <br />' a Organic Vapor Analyzer (PID or FID) <br /> b 2-inch and 4-inch, air tight, well head caps equipped with sampling valves <br />' c Hand operated or electric sampling pump with Tedlar bags for periodic sampling <br /> and analyses <br /> d Magnehelic gauges ranging from 0-0 5 inches H2O, 0-5 inches H2O, 0-10 Inches <br />' H2O, and 0-100 inches H2O <br /> e Pitot tube used w/ magnehelic to get direct reading of air velocity in feet per <br /> minute (fpm) <br />' f Air stream temperature gauge <br /> 7 0 SVE SYSTEM RADIUS OF INFLUENCE/PORE VOLUME EXCHANGE RATE <br /> I The radius of influence (ROI) of the SVE system was estimated while extracting vapors from SV-1, SV-8, <br /> and SV-9, individually The ROI is defined as the distance where 0 1 inches of H2O vacuum occurs <br /> (Pederson and Curtis 1991 Soil Vapor Extraction Technology Reference Handbook,EPA/540/2-911003) <br /> Vacuum measurements in inches of H2O were recorded from gages connected to surrounding SVE wells <br /> to evaluate the ROI The measurements were collected while the blower was exerting a vacuum of <br /> approximately 31 inches HO at each extraction well head (field notes attached) The blower was <br /> operating at a flow rate of approximately 109 SCFM (see SVE SCFM- Emission Calculation Work Sheet, <br /> Appendix C) Figures 9 through 11, Appendix A, illustrate the ROI estimates for SV-1, SV-8, and SV-9, <br /> based on a capture zone limit of 0 1 inches of 14,0 vacuum <br /> Radius of Influence for Selected SVE Wells <br />' a SV-1 = 50 feet <br />■ b S V = ZV feel, <br /> c SV-9 = 30 feet <br /> I <br /> L� CONDOR <br />