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REMEDIATION SYSTEM'S OPERATION OVERVIEW <br /> Pump—and Treat S_ sy tem <br /> The P&T system was turned off by ASE personnel on February 28, 2002 That <br /> system no longer operates <br /> Air-Sparging/Vapor-Extraction System <br /> The ASIVE system operated continuously during the month of July 2002 <br /> except for brief periods of downtime for periodic, scheduled maintenance <br /> Flow Rate <br /> While operating, the system infected an average of 53 cubic feet per minute <br /> (cfm) of air into the 7 AS well manifold, and extracted an average of 76 cfm o f <br /> petroleum-hydrocarbon laden air from the 7 VE well manifold The IC engine <br /> operated typically at 1800 RPM On June 10, 2002, ASE closed VE-1 and AS-1 <br /> to increase the vacuum and infection rate to the remaining wells VE-1 and <br /> AS-1 are positioned in an area of low hydrocarbon concentrations <br /> Maintenance <br /> The IC engine was turned off each 220 to 250 hours of operation to perform <br /> routine maintenance activities Scheduled maintenance included lube, oil and <br /> filter for the engine and blowers, and draining of the moisture knock-out <br /> drum <br /> INFLUENT AIR SAMPLE COLLECTION AND <br /> ANALYSES <br /> I nfluent Air Sammi <br /> On July 26, 2002, ASE collected an influent air sample (INF-VE-072602) from <br /> the manifold of the 6 VE wells This sample was analyzed by Kiff Analytical of <br /> Davis, California (ELAP #2236) for total petroleum hydrocarbons as gasoline <br /> (TPH-G), benzene, toluene, ethylbenzene, and xylenes (collectively known as <br /> BTEX), the five fuel oxygenates and lead scavengers by EPA Method 8260B The <br /> analytical results for this sample are tabulated in Table One The influent air <br /> sample analytical report and chain of custody record is attached in Appendix <br /> i A <br /> Frank's One Stop Remediation System Monthly Report — July 2002 <br /> - 2- <br />