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I GeolaAArcal7ecfucres inc, . We1CInStallation Report Page 6 City of Escalon Project No. 750.2 January 31,2000 1. I 4.0 CONCLUSIONS AND RECOMMENDATIONS Based on our interpretation of the data collected over the course of this subsurface investigation, GTI have reached several conclusions. These conclusions are based on the premise that the data we considered, although incomplete, are representative of actual site conditions. We acknowledge that there may be undiscovered conditions, which would upon their consideration, change our interpretation and thus our conclusions. Our recommendations are based on our knowledge of site conditions, and on the state and limitations of subsurface investigative technology. ► 4.1 Conclusions i Geological Technics Inc., taking into consideration the data obtained from this investigation and from the data compiled during previous soil and groundwater investigations and the regular groundwater monitoring events, makes the following conclusions. .,� g � I 1. Soil contamination is still present around the former pump islands and tanks, however at much reduced levels from those found at the site earlier. �j 4.2 Recommendations ' Geological Technics Inc. makes the following recommendations based on the conclusions f outlined above: � 1. Groundwater monitoring will be performed once all three monitoring wells have been finished to surface grade. 2. A vapor extraction pilot test will be performed once the vapor wells have been finished to surface grade. 3. A report that will include the groundwater monitoring data, vapor extraction pilot test data and all previous site characterization data will be prepared. Recommendations can then be drawn. # 4 i I I I I I I k� J l i t f