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Site Characterization Report: 7500 West Eleventh Street, Tracy, CA. Page 7 f-f7 Included in existing wells that went undetected in the database searches was the domestic water-supply well located inside the Casa Mendoza restaurant that is located on the 7500 West Eleventh Street property itself. This well supplies potable water to the restaurant. An annual permit fee is paid to the SJCPHS for oversight of the well, water from which is periodically tested according to requirements of that agency. These permit-compliance activities are the responsibility of the restaurant operators. The Navarras do not have a copy of the well log, if such exists. Under non-pumping conditions, the depth to t groundwater in the well is approximately 12 ft. below the ground surface. The total depth of the well is unknown, but the pump, which was replaced on June 1, 1999, was set at a depth of 70 ft. To extend the search for neighboring wells, SJC reconnoitered the area and conducted interviews with neighboring property owners and other citizens having knowledge of the history of the area. That research identified the presence of a total of nine (9) domestic water-supply wells, the locations of which are shown on Figure 2. Not shown on Figure 2 is an additional water-supply well located some 330 feet south of the 7500 West Eleventh Street property at 7601 Cabe Road. In addition to the potable water-supply wells noted above, there are eight (8) groundwater-quality monitoring wells located on the C&B Equipment site at 7474 West Eleventh Street that were installed to support a site characterization program conducted on that property subsequent to the discovery of a leaking underground fuel storage tank there. (Geological Technics, Inc. 1998.) The locations of those wells are also shown on Figure 2. � i 3.2 Site Survey } A site characterization program that includes an investigation of the extent to which groundwater has been affected by releases of fuel hydrocarbons requires an accurate survey of the site and surrounding areas. The positions of exploratory borings, groundwater-quality monitoring wells and sites at which fuel was released into the subsurface must be accurately plotted to permit reliable computation of water table contours, groundwater gradients, directions of groundwater flow and the lateral and f down-gradient limits of the plume of affected groundwater. To comply with those engineering requirements, the site characterization work plan prepared by SJC provided for a topographical survey of the subject property and adjacent areas by a surveyor's field party lead by a California-licensed professional surveyor using modern, cost-effective surveying technologies. However, the California Underground Storage Tank Cleanup Fund (USTCF) denied funding for that work and stated that "only 8 hours of assistant engineer time is determined necessary" for the survey work (California Underground Storage Tank Cleanup Fund 2000) that involved some 15.5- acres of developed land. (Fua 2000.) Noting that even an approximate topographical survey using a tape to locate features by SJC