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05 November 2010 <br /> AGE-NC Project No. 96-0254 <br /> Page 5 of 6 <br /> A four-foot thick bentonite seal will be placed above the filter pack of each well to minimize ` <br /> the potential of grout penetration into the filter pack or diffuser section of the well. The <br /> bentonite seal will be formed by pouring bentonite pellets into the annulus and allowing <br /> them to settle on the filter pack`. The bentonite pellets will be allowed to hydrate for a <br /> minimum of one-half hour prior to grouting. <br /> Following hydration of the bentonite,the remaining annular space will be filled to within one <br /> foot of the ground surface with a cement grout. The grout mixture will consist of type 1/II <br /> portland neat cement and not more than 6 gallons of water per 94-pound sack of cement. <br /> The grout will be placed by pumping through the hollow stem augers. For inspection <br /> purposes, the EHD will be notified at least 48 hours prior to conducting grouting <br /> procedures. A 1-inch diameter PVC riserwill connect the injection points to the distribution <br /> system and ozone generator.A traffic-rated well box will be installed over each ozone well. <br /> 3.3. IN-SITU OZONE INJECTION DISTRIBUTION NETWORK/SYSTEM <br /> A network of3/8-inch diameter, PVC tubing will be installed in appropriately sized conduit <br /> in a series of trenches approximately 8-inches wide and 12-inches deep. <br /> R <br /> Ozone distribution lines will be routed underground from each ozone well head to solenoid f <br /> control valves on the ozone generator.An oxygen condenser and ozone generator is fitted <br /> into a compressed air-stream through a throttled venture. This flow stream is then <br /> connected to a manifold, under a timer cycled into the ozone wells using a 3/a-inch diameter <br /> polyethylene tubing to well heads through a network via underground piping. The ozone <br /> injection system delivers 8 standard cubic feet per minute (scfm) at a pressure of 20 <br /> pounds per square inch, adequate to displace the static waterwithin each ozone well. The <br /> ozone system unit will be secured'by a chain-linked,gated enclosure approximately 10 feet <br /> wide, 10 feet long and 6 feet high. <br /> Electricity is readily available to the site.A dedicated electrical meter panel will be installed <br /> by a licenced electrical contractor with an electrical meter'service connection installed by <br /> representatives of Pacific Gas and Electric (PG&E) that will connect directly to the ozone <br /> generating unit. A plan of the proposed piping system and ozone generator location is <br /> depicted in Figure 2. p� <br /> f <br /> 3.4. IN-SITU OZONE INJECTION PILOT TEST <br /> i <br /> The typical ozone remediation process is an in-situ process utilizing fine bubbles of ozone- I <br /> rich air, injected into saturated soil to produce hydroxyl radicals for contaminant oxidation <br /> and decomposes dissolved petroleum hydrocarbon constituents. <br /> Advanced Geo Environmental,Inc. <br /> J <br />