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• The vacuum imposed on the extraction well ranged from 90 inches of <br /> ' water at the beginning of the test to a high of 127 inches of water near <br /> the end of the test <br /> ' • The flow ranged from a high of approximately 250 cfm at the beginning <br /> of the test to approximately 190 cfm at the end of the test <br /> ' • The pumping rate induced on the extraction well began at 1 gallon p e r <br /> minute During the middle hours of the test, the flow was increased to <br /> approximately 1 7 gpm By the latter stages of the test, the system was <br /> extracting 1 62 gpm of water from the extraction well <br /> • An organic vapor meter (OVM) was utilized to measure hydrocarbons <br /> within the extracted vapors Vapor concentrations were measured <br /> directly from the influent air stream piping dust prior to t h e <br /> combustion chamber OVM readings ranged from 1,111 parts per <br /> million by volume (ppmv) to 3,398 ppmv <br />' The influence of the extraction well was measured on the surrounding <br /> piezometers and monitoring well during the test The greatest <br /> influence was measured at monitoring well MW-5 (as high as 1 5 inches <br /> of water column) which is only 4-feet away from the extraction well <br /> The least amount of influence was measured on piezometer P-1 (as <br /> high as 008 inches of water column) which is approximately 45-feet <br /> from the extraction well <br />' The groundwater pumping influence was measured in the surrounding <br /> piezometers and monitoring well MW-5 using a water level sounder <br />' During the duration of the test, only monitoring well MW-5 showed a <br /> measurable influence of 007 feet of drawdown by the end of the test <br /> There was no measurable affect on any of the surrounding <br /> piezometers The dual phase test data is tabulated as Table Four of the <br /> Tables Section <br /> • Vapor samples were collected from the influent vapor stream in Tedlar <br /> bags at 7 30, 11 30, 14 30 and 17 30 These samples were analyzed f o r <br /> TPH-G, BTEX and oxygenates by EPA Method 8260 by Chromalab, Inc of <br /> Pleasanton, California (ELAP #1094) Analytical results are tabulated as <br /> Table Five in the Tables Section, and the certified analytical report is <br /> attached in Appendix F <br /> The data gathered during the dual-phase test proved that the technology <br /> of vapor extraction could be a useful tool to capture a sizeable radius of <br /> Frank's One Stop Interim Remediation System Workplan — September 2000 <br /> -13- <br />