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\.r W' <br /> 02 December 2009 <br /> AGE-NC Project No. 96-0106 <br /> Page 9 of 10 <br /> 4.6.1 Injection Media Preparation <br /> Based on previous site characterization, clay is typically encountered at depths between 5 feet and <br /> 12 feet bsg,while sand with silt at depths between 12 feet and 25 feet bsg. Due to the different <br /> hydrogeologic conditions,two separate injection volumes have been designed by Regenisis for this <br /> site. All proposed injection media will be mixed on-site in a portable water trailer fitted with a <br /> centrifugal pump.The mixture will be prepared in accordance with the manufactures specifications, <br /> which have been included as Appendix K. A detailed breakdown of the application and mixing <br /> volumes, as well as the specific design for the pilot test has been included as Appendix H. <br /> 4.6.2 Injection Procedure <br /> The above ground prepared solution of RegenOx will be applied to the two subsurface lithologies <br /> utilizing a van mounted geoprobe and applicable injection tooling. A specially designed injection <br /> tip will be placed at the lead end of the geoprobe used to inject the media. The pre-mixed media will <br /> be fed from the tank through an injection pump and subsequently through the geoprobe rods. Th /_ <br /> media will be injected from the top (5 feet bsg) down to a total depth of 25 feet bsg. Gtt 5 61/ '�M <br /> Upon completion the injection borehole will be backfilled with type II or equivalent,portland cement <br /> the entire length of the borehole. The cement mix will not exceed 6 gallons of water for each 94 <br /> pound bag of dry mixture.Each borehole will be sealed to surface grade with a mixture of fast setting <br /> concrete. <br /> 4.7. ISCO PROGRESS MONITORING AND SAMPLING 3 <br /> Progress ground water monitoring and sampling will be completed one week after eachninjection <br /> application.SMonitoring and sampling will be performed in accordance with AGE's standard <br /> monitoring and sampling procedures (Appendix G). Field parameters and laboratory samples will <br /> be collected from MW-4 and the proposed new monitoring well and will be monitored and tested <br /> for the constituents and parameters listed in section 3.4. <br /> X Y.V I �}w fir=' , <br /> � y W CAk <br /> L G frJe <br /> Advanced GeoEnvironmental,Inc. <br />