Laserfiche WebLink
• 28 February 2005 <br /> AGE-NC Project No 99-0624 <br /> j Page 10 of 12 <br /> Following hydration of the bentonite chips,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 1/11 portland <br /> neat cement and not more than 6 gallons of water per 94-pound sack of cement The grout will be <br /> placed by pumping through a tremae pipe or the hollow stem augers For inspection purposes, the <br /> EHD will be notified at least 48 hours prior to conducting grouting procedures A /4-inch PVC riser <br /> will connect the sparge point to the ozone generator A traffic-rated well box will be installed over <br /> the sparge well <br /> 5 2 IN-SITU OZONE SPARGING DISTRIBUTION NETWORK/SYSTEM <br /> Three-eighth-inch diameter PVC tubing will be installed in an appropriately-sized conduit in a trench <br /> approximately 8-inches wide and 12-inches deep The conduit will be routed underground from the <br /> sparge well to an ozone generator The ozone generator will be secured by a chain-linked, gated <br /> enclosure approximately 4 feet wide by 8 feet long and 7 feet high <br /> Electricity is readily available to the site A dedicated electrical meter panel will be installed by a <br /> Licensed Electrical Contractor, an electric-service meter that will connect directly to the ozone <br /> generating unit will be installed by Pacific Gas and Electric (PG&E) <br /> A plan of the proposed piping system and ozone generator location is depicted in Figure 2 <br /> 5 3 OZONE BENCH-SCALE PILOT STUDY <br /> A bench-scale pilot study as required by the RWQCB will be performed prior to implementation of <br /> the active in-situ pilot study Selected soil and ground water samples collected during well <br /> installation will be analyzed by a DHS-certified laboratory Prior to bench testing,the samples will <br /> be analyzed for the constituents listed in Section 4 2 and <br /> • General Metals(Al, Sb,As,Ba,Be,Ca, Cd, Cr,Co, Cu,Fe,Pb,Mg,Mn,Hg,Mo,K,Ni,Ag, <br /> Na, Se, Tl, W, V, Zn) by EPA Method 200 8, <br /> • Chromium VI by EPA Method 218 6, and <br /> • General minerals (Cl, F, NO3, SO4 and others) by EPA Method 300 1 <br /> In addition, water samples will be analyzed for <br /> • pH by EPA method 150 1, <br /> Advanced GeoEnvlronmental,lite <br />