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Site Characterization and Soil Remediation Plan: 7500 West Eleventh Street, Tracy, CA Page 11 geographical information that permitted the location of the wells to be determined by SJC staff. The remaining 18, for which there is insufficient information in the databases to determine their locations from maps or other published resources, are listed in Appendix A. All 18 were found in the FRDS database. However, SJC staff is familiar with Tracy and its surrounding area and was able to eliminate, at least preliminarily, 16 of the 18 from ' consideration as being distant from the subject property. F - Of the two listed wells remaining, one is a water-supply well at the property at 7933 West Eleventh Street that was formerly the location of Anna Maria's Italian Restaurant. That property, now known as Jack's Place, is located approximately 1,200 ft. west of the subject property, on the south side of ' Eleventh Street. The second well found by the database search within a radius of 2,000 ft. of the subject property is on the property of the Brown House Trailer-tel mobile home park that is located approximately 1200 ft. south of the subject property, on the west side of Chrisman Road, at'the address 24221 Chrisman Road- (See Figure I for street locations-) From SJC's experience working on projects in the Tracy area, it is known that water-supply wells, particularly those used for agricultural irrigation, are densely located in the general neighborhood of the subject property. Therefore, the results of map and database search described above may not reliably locate all wells within a 2,000-ft radius of the subject property. Accordingly, the proposed site characterization program will include a field search that will include interviews with local property owners to identify additional wells that >: may be present in the vicinity. That field survey will be conducted shortly after the site characterization program is initiated. _..� Evaluation of Lateral and Vertical Extent of Zone Affected by Fuel } >� Hydrocarbons So that the lateral and vertical boundarirtes of the sail and groundwater that is J affected by fuel hydrocarbons can be ascertained, and the number and location of groundwater-quality monitoring wells required can be cost-effectively selected, push probe and hydro-punch equipment will be used to investigate subsurface conditions at some twenty (20) points at on-site and off-site locations. A conceptual distribution of probe and hydro-punch exploration =I points is shown on Figure 10. As is conveyed by the symbology used to ] identify tentative exploration points, the actual locations at which the subsurface will be explored will depend on the results obtained from the growing data of information produced as the work progresses. The principal objective of this phase of the site characterization will be to i delineate the outer boundaries of the plume of hydrocarbons emanating from the former sites of the underground storage tanks. This calls for probe and hydro-punch holes to be located beyond the limits of the plume at points where # sic