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l <br /> START-UP OPERATIONS AND SOURCE TESTING OF THE VES <br /> The vapor extraction system was turned on January 5, 1990 utilizing all four vapor <br /> extraction wells and four groundwater monitoring wells. The initial vapor concentrations <br /> were relatively low and vapor development of these wells progressed through the <br /> weekend to higher concentrations. All the vapor wells (VP-1, VP-2, VP-3, VP-4) and <br /> groundwater monitoring wells MW-1, MW-3, MW-4, and RW-1 were sampled using a <br /> Y calibrated SKC Pump with SKC Charcoal tubes. These samples were submitted to <br /> Superior Analytical L6boratory Inc. for analysis by NIOSH Method 1003/modified EPA <br /> Methods 8015 and 8020 for TPH as gasoline and BTEX. Results of these analyses are <br /> presented in Tables 3 and 5. Vapor concentrations obtained in the field with the Foxboro <br /> OVA 128-GC were taken from these wells and are reported in Tables 1 and 2. Analytical <br /> hard copy for the analyses of SKC charcoal tubes is presented in Appendix I. <br /> e <br /> During the first 60 hours of VES operation, over 242 pounds of gasoline were extracted <br /> based on calculations from the vapor concentrations and flows from the individual <br /> blowers. The vapor concentrations from the individual vapor extraction wells(VP-1,VP-2, <br /> VP-3,VP-4) had not increased in any significant amount during this period indicating that <br /> little hydrocarbua, vapor exists within the area of influence of these wells. However, the <br /> vapor concentrations from the individual monitoring wells (MW-1, MW-3, MW-4, and RW- <br /> 1) did increase significantly indicating that vapor development of these wells was <br /> occurring and that progressively larger amounts of gasoline as vapor were being <br /> extracted from the vadose zone. <br /> _. 6 <br /> VAPOR EXTRA.CTIU� TECHNOLOGY, NC. <br />