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28 May 1991 <br /> GeoAudit CV 43C4 . 1. 1 -- Work Plan for Vacuum Extraction <br /> ' Page 9 of 10 <br /> 5) Bury the line below surface and connect the line to the <br /> vacuum extraction unit. <br /> ' 9 . 4 . PERFORMANCE TEST TO DETERMINE THE RADIUS OF INFLUENCE AND TO <br /> ESTIMATE THE LATERAL EXTENT OF THE CONTAMINATION PLUME <br /> 6) Drive in 3 perforated soil probes (with perforation at <br /> approximately 15 feet below ground surface) at a distance <br /> of 5, 10 and 15 feet away from the extraction well . <br /> ' 7) Evacuate the standing vapor in the probes using an oil- <br /> less vacuum pump for approximately five minutes. <br /> 8) Take the organic vapor reading using a PTD. <br /> 9) Estimate the lateral extent of the vadose zone plume at <br /> that depth. <br /> 10) Extract vapor from the extraction well with an operating <br /> rpm of approximately 2 , 000 for at least 24 hours. <br /> ' 11) Monitor, measure and log the vapor "draw down" in each <br /> probe. <br />' 12) Determine the radius influence of the vapor extraction <br /> well. <br /> 13) Report the findings in a format to be submitted to the <br /> SJEHD. <br />' 9 . 5 . MONITORING PROCEDURES <br /> 1 Vapor monitoring and logging of parameters of the vacuum extraction <br /> unit are performed on a daily basis in the first week of operation <br /> and weekly basis thereafter. The following items are conducted: <br /> 14) Obtain and log the organic vapor level using a (photo- <br /> ionization detector: PID) from three locations: 1) from <br /> the extraction line prior to combustion, 2) from the <br /> effluent line prior to catalytic converter and from 3) <br /> the exhaust gas after catalytic converter for each <br /> monitoring day. <br />' 15) Log flow rate, engine operational hours, engine rpm, <br /> vacuum readings and exhaust temperature. <br />