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• r A pilot vapor extraction test was performed at the subject site on May 12 1993 (Figure . 1) Testing, data analysis, and air sampling procedures are outlined in the Aegis SOP in Appendix A The test involved inducing soil vapor flow from vapor extraction wells VEW-1 and VEW-2 and monitoring and recording the soil vapor flow rates from the wells, the induced vacuum at the extraction well, soil vapor temperature, and the vacuum on other monitoring and vapor extraction wells located on site (Figure 2) Air samples were collected at the end of testing from each well and submitted to Excelchem Environmental Labs of Citrus Heights, California The samples were analyzed for a) total petroleum hydrocarbons (TPH), as gasoline, by Modified EPA Method 8015/Purge-and-Trap, b) aromatic volatile organics (benzene, toluene, ethylbenzene and total xylenes (BTEX)) by EPA Methods 602/Purge-and-Trap and 8020/Purge-and-Trap The laboratory analytical report and chain-of-custody form are attached to this appendix OPERATION A California Environmental Engineers & Contractors (CEECON) C1000 I C Engine (Cl 000) was transported to the site to perform the vapor extraction test The C 1000 uses a Ford Motor Company 300 cubic inch displacement, six cylinder, four cycle, propane fueled internal combustion engine to induce a vacuum on, and draw air from the vapor extraction well The hydrocarbon laden air is burned in the cylinders, and the exhaust is passed over a precious metal catalyst to enhance the oxidation of hydrocarbons and carbon monoxide before being discharged to the atmosphere TEST RESULTS VAPOR EXTRACTION WELL VEW-1 The test on vapor extraction well VEW-1 was conducted on May 12, 1993 from 10 00 hours to 12 00 hours Air samples were collected at the end of the test Data from the pilot test is summarized below System Parameters; Average intake vacuum 46 0 inches water Average intake temperature 81 8 °F Average flow rate 8 2 cubic feet per minute (cfm) •