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samples were decanted from the bailers into 40-m1 VOA vials, preserved <br /> • with hydrochloric acid, and sealed without headspace The samples were <br /> then labeled and stored on ice for transport to Kiff Analytical under chain <br /> of custody See Appendix F for a copy of the Field Logs <br /> Well purge water was treated by the on-site water treatment system <br /> 7 . 0 CPT BORING AND DOMESTIC WELL ELEVATION AND <br /> LOCATION SURVEY <br /> The ground surface elevation of the new boring locations were surveyed <br /> relative to mean sea level (ms]) by Farley Surveying, Inc of Stockton, <br /> California on February 23, 2001 The horizontal locations of the CPT <br /> borings, as well as the locations of many of the area domestic a n d <br /> irrigation wells, were also surveyed relative to the California Coordinate <br /> System The benchmark used for this survey was the USGS M1164- 1960 <br /> brass cap at the southeast corner of Airport Way and West Yosemite <br /> Avenue ASE could not access the domestic wells located at 495 and 2 3 8 <br /> Airport Way on the date of the survey, so these locations are estimated <br /> on ASE's Figure 4 The survey information is presented in Appendix G <br /> 8 . 0 SUBSURFACE LITHOLOGY AND HYDROGEOLOGY <br /> Four geologic cross-sections were prepared for the site The geologic <br /> cross-section locations are shown on Figure 6 Cross-section A-A', along <br /> the downgradient axis of contamination, is shown on Figure 7 Three <br /> transect cross-sections, perpendicular to the axis of contamination, are <br /> presented as Figures 8 through 10 In general, there is a consistent high <br /> permeability zone shallower than 20-feet bgs throughout the area There <br /> is also another consistent zone of high permeability from as high as 30- <br /> feet bgs to a depth of at least 40-feet bgs This zone is much thicker in <br /> some locations, and extends to over 70-feet bgs in some locations with <br /> deeper areas exhibiting medium permeability Beneath the second zone <br /> of high permeability, the layers become highly variable with some areas <br /> exhibiting a high number of layers of various permeability and other <br /> areas exhibiting predominately low permeability soils In general, there <br /> are fewer high permeability layers below 55-feet bgs farther to the north <br /> away from the site There are also fewer high permeability layers at <br /> depth to the northeast <br /> • <br /> Franks One Stop Report — March 2001 <br /> -14- <br />