Laserfiche WebLink
Work Plan for Refined Plume Definition and Management of Floating Product-7500 W 11th St., Tracy, CA. Page 47 <br /> 9.4 Floating Product Remediation Technologies Considered <br /> In preparing this work plan, SJC considered three alternate technologies for remediation of <br /> floating product that is known to be present in an area around Monitoring Well MW-7, <br /> which, as is shown of Figure 4, is located on the northern shoulder of West Eleventh Street <br /> +� across from the 7500 West Eleventh Street property, close to the intersection of that highway <br /> iy with Chrisman Road. <br /> p In evaluating the alternate approaches for removal of LNAPL from the water table (in <br /> addition to the design issues. detailed in Section 9.3), SJC has considered their technical <br /> effectiveness, their capital cost and the estimated total operating cost from the time of <br /> installation until all floating product has been successfully removed. In each case, the <br /> advantages and disadvantages of the technology have been considered in the context of the <br /> > estimated distribution and total recoverable volume of LNAPL that must be removed from <br /> the subsurface. As discussed in Section 5.0, although it is difficult to make a quantitative <br /> estimate of that volume, the site characterization and groundwater-quality monitoring <br /> A programs completed to date indicate that it is on the order of several thousand gallons. <br /> L The three technologies considered are described in Sections 9.4.1 9.4.2 and 9.4.3 below. <br /> 1� , <br /> Note: <br /> In each case, a preliminary design for implementation of the technology at the <br /> 7500 West Eleventh site has been developed. Those designs are sufficient for <br /> proof of concept purposes and preparation of engineer's cost estimates. However, <br /> they are not final designs.A final design of the technology selected for installation <br /> will be undertaken after initial data from the floating-product monitoring wells <br /> described in Section 8.0 is available. Final designs of the subsurface portions of <br /> the systems, such as the locations of extraction wells or the dimensions of cut-off <br /> trenches, will be adapted to meet site-specific conditions as revealed by synthesis <br /> of all data available at the time they are installed, including criteria derived by <br /> application of the Observational Method(Peck 1969). <br /> w <br /> SJC <br />