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.Response to IAB -Site Remediation Page 3 <br /> Chapin Brothers Inc. <br /> Proposal No. 325.3 <br /> May 24,1995 <br /> flow rate of 250 Scfm at 8" of Mercury vacuum. for extracting the vapors form the <br /> subsurface soils. <br /> • A positive displacement blower capable of producing approximately 20 psi of <br /> head at 80 Scfm will be used for air sparging. <br /> • Costs for the To and air sparge pump have not been included in this bid since it <br /> is understood that Chapin Bros. Inc. will purchase/lease this equipment. <br /> Documentation on specifications and purchase prices have been submitted to <br /> Chapin Bros. previously. <br /> Task 3. Remedial Monitoring <br /> * The system will be monitored on a daily basis for the first two weeks, and then <br /> weekly thereafter for the remaining term of operation (12 months). <br /> • An air sample will be collected each month to monitor remedial effectiveness. <br /> Each sample will be analyzed for Benzene, Toluene, Ethyl Benzene and Xylene <br /> (BTEX by EPA method 8020) and Total Petroleum Hydrocarbons as Gasoline <br /> (TPH-Gas by EPA method 8015m). <br /> Task 4.Progress Soil Samples <br /> • A total of two progress soil borings to 30 feet will be completed, one at the end of <br /> six and twelve months, respectively. <br /> * These borings will be logged at five foot intervals by a professional geologist <br /> under the supervision of a registered geologist. <br /> • At least two soil samples from each boring event will be submitted for analysis <br /> for B'f`EX and TPH-Gasoline. <br /> Task 5. Systems Maintenance <br /> + The system will be maintained to increase operating efficiency and maximize <br /> operating time. Maintenance events will coincide with site emissions <br /> monitoring events. <br /> Estimated Proiect Costs <br /> The itemized budget for the work described above is itemized by unit costs and is <br /> attached in the Bid Response Form. The estimated project costs is $51,320. As we <br /> discussed previously, from our experience this system design is inadequate to <br /> accomplish site remediation. In the event that Geological Technics Inc. wins this <br /> bid, we will design a more complete remedial system and help you get it approved <br /> by the USTCFP by using their Pre-Approval process. We have been using it for <br />