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%014 '"d Site Update Report—3rd Quarter 2009 October 12,2009 Former Canteen Facility D___3 Jul-Sen 2009; SVE System operations have proceeded without vapor treatment. The system uptime for this quarter was 100%, bringing the yearly uptime for the systems to 98.6%. SVE System Operations The current operations of the AS-SVE Skid continued, with operations and monitoring (O&M) activities for the AS-SVE remediation system conducted weekly. The weekly O&M activities included the following: • Inlet Manifold Vacuum, Flow, and PID Readings • Blower Vacuum • Check, Clean, and/or Replace the Inline Filter (as necessary) • Exhaust Temperature and PID Readings • Adjust Ambient Air Control Valve (as necessary) • Hour Counter in Control Panel On September 24, 2009, the SVE Hour Counter was determined to be non-operational. A replacement unit was ordered for installation on the following O&M visit. The following table summarizes the operating parameters of the system during this quarter. Vacuum Levels Total Well Flow HC Concentrations SVE in. w.c.) (SC MI.._...___,_.____ _ (ppy) Wells Min::' Max Min Min Min Max All 67 71 132 157 0.5 1 3.0 Note(*): Based on PID readings or laboratory results, depending which was highest. Further details of recorded system data and operating parameters are summarized in Tables 1, 2, and 3. Hydrocarbon Vapor Monitoring Influent vapor concentrations from each of the VE wells and effluent vapor concentrations from the SVE Blower were measured weekly using a photo-ionization detector (PID) meter. Maximum influent (Inf) readings from wells VE-1, VE-2, and VE-3 were determined to be 9 ppmv, 8 ppmv, and 22 ppmv, respectively. SVE wells VE-4 and VE-5 typically exhibit readings of 0 ppmv. PID readings for the blower exhaust varied from 0.0 to 3.0 ppmv. During one O&M visit each month, an effluent vapor sample was collected in Tedlar bags. These samples were express-delivered to Pace Analytical Services, Inc. in Minneapolis, Minnesota for analysis of TPH, BTEX, and MTBE concentrations via EPA Air Toxics Method TO-3. All laboratory results for this quarter were determined to be below detectable limits (BDL). The analytical results are summarized in Table 2. With overall system flow rates that varied from approximately 157 to 171 scfm, the hydrocarbon (TPH/VOC) recovery rates varied from 0.03 to 0.20 lbs/day during this monitoring period. Through the end of June 2009, the overall hydrocarbon vapor recovery was been approximately 6,448 pounds (1,030 gallons).