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GROUND ZERO ANALYSIS, INC. <br /> ' water was observed in test well VW-1 after 5 minutes A <br /> vacuum ranging from 49 to 50 inches of water at a flow rate of <br /> l 55 cfm was applied to test well VW-5 and the response was <br /> ' observed in test well VW-4 , constructed in the same boring <br /> A vacuum of 0 5 inches of water was observed in test well VW-4 <br /> after 9 minutes A vacuum ranging from 44 5 to 45 inches of <br /> water and flow rates ranging from 33 to 34 1 cfm were applied <br /> to test well VW-4 and the response was observed in test well <br /> VW-5 No vacuum influence was observed in test well VW-5 after <br /> 6 minutes During the Jong term test conducted on VW-1 no <br /> vacuum response was observed in VW-2 until 9 minutes into the <br /> test Likewise, 6 minutes elapsed before a vacuum was <br /> observed in VW--1 during the long term test on VW-2 During <br /> ' the long term test on VW-4 no vacuum was observed in VW-5 <br /> These data indicate that the wellbore seals separating VW- <br /> 1/VW-2 and VW-4/VW-5 maintained their integrity and no bypass <br /> or short circuiting occurred within the boreholes <br /> ' Vapor Test Well VW-] <br /> During the long term vapor extraction test using test well VW- <br /> 1 as the extraction well, induced vacuums were observed in <br /> wells VW-3 , VW-4 , VW-5 , VW-6 , and MW-13 within 3 minutes An <br /> induced vacuum was observed in well VW-2 (constructed in the <br /> same boring) within 9 minutes and probably represents <br /> formation bypass No significant increase in the induced <br /> vacuum was observed in the wells when the flow rate was <br /> increased from 50 6 to 52 S cfm Based on these results a <br /> vacuum of 39 inches of water and a flowrate of 50 cfm appears <br /> to be achievable using test well VW--1 as the extraction well <br /> A radius of influence of approximately 30 to 35 feet is also <br /> indicated <br /> Vapor Test Well _VW-2 <br /> During the long term vapor extraction test using test well VW- <br /> 2 as the extraction well, induced vacuums were observed in <br /> wells VW-3 , VW-4 , VW-5, VW-6, and MW-13 within 3 minutes An <br /> induced vacuum was observed in well VW-1 (constructed in the <br /> ' same boring) within 6 minutes The IC engine stalled when an <br /> attempt was made to increase flow from 50 6 cfm Based on <br /> these results a vacuum of 14 inches of water and a flowrate of <br /> ' 50 cfm appears to be achievable using test well VW-2 as an <br /> extraction well A radius of influence of approximately 30 to <br /> 35 feet is also indicated <br /> I <br /> I <br /> ' 4 <br />