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. feet downgradient of the dispenser), and only occasionally reached TT-2 (which is within 10 feet of the tank cavity) The second line of evidence is the data from the receptor survey Review of the well permits files at PHS/EHD and the State Department of Water Resources, and a drive-by inspection of the area, revealed that there are only three municipal or domestic wells that are downgradient (south) of and within 2000 feet of the site The only one that is a high- volume well is a municipal well that is located about 1950 feet from the site, and periodic sampling of this well by the Lodi Department of Public Works has detected no contaminants Moreover, the depth to groundwater at Teresi Trucking has remained remarkably constant in comparison to most other sites in San Joaquin County, this indicates that groundwater at the site is not affected significantly by pumping of irrigation or domestic wells in the area Hence, contaminants are not likely to be drawn off-site by pumping of surrounding wells 6.0 CONCLUSIONS Appendix A contains the Checklist of Required Data for No Further Action Requests at Underground Tank Sites All of the information required by that form is either contained in this report or in previous assessment and monitoring reports We believe that the site meets the requirements listed in Appendix B of the Tri-Regional Recommendations for Preliminary Investigation and Evaluation of Underground Tank Sites Each of these is discussed below 1. Contaminants remaining in the vadose zone must not reverse or threaten to reverse the mass reduction rate of ground water pollutants. As discussed above, groundwater has not risen above 50 feet since this investigation began, and soil contamination is not present below 25 feet Therefore, any contaminants that may still be present above 25 feet are unlikely to have any impact on groundwater 2. Separate phase product has been removed to the extent practicable. It is possible that some free-phase diesel was present in the domestic well prior to its destruction in 1996 This fuel would have accumulated in the well bore over a long period of time, however, the amount was very limited and it is unlikely that it extended more than a few inches beyond the well bore No free product has been found in any of the other wells, and contaminant concentrations are far to low to suggest that free product might be present anywhere in the vicinity of the UST cavity 3. No existing water supply wells, deeper aquifers, surface waters or other receptors . are threatened by pollutants remaining in the aquifer. 6