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i <br /> Laboratory analysis of ground water samples indicates the presence of moderate levels of <br /> gasoline and gasoline constituents in water collected from monitoring well MW-1 and <br /> ' low levels in MW-6. All other monitoring well samples indicated non detectable levels <br /> for analyzed constituents. These data indicate a decrease in constituent levels as <br /> compared with previous sampling event data. <br /> 1 <br /> 7.0 RECOMMENDATIONS <br /> Based upon the results of the additional soil and ground water investigation, and the <br /> results obtained from this quarterly sampling event, AGS believe that the lateral and <br /> vertical extent of gasoline contaminated ground water have been adequately defined. <br /> AGS recommends continued quarterly monitoring of the six monitoring wells sampled <br /> during this event to assess ground water quality over time. The next regularly scheduled <br /> quarterly sampling event will take place in December, 1996. <br /> 8.0 SIGNATURES AND CERTIFICATION <br /> ' This project was performed b American Geological Services Inc. in accordance with <br /> Y g , <br /> accepted geologic and hydrologic standards of the State of California in effect at the time <br /> of this investigation. Additional work or sampling at this site may generate data that <br /> could lead to a change of opinion regarding site conditions. Consequently, no warranty is <br /> made, either expressed or implied, with respect to the geologic, hydrologic or chemical <br /> conditions beneath the Tracy Cold Storage site. , <br /> D cc <br /> 4Nf DIZpGFS! <br /> This report was prepared by: �`� OC, w� 10 <br /> U Ross R.Grunwald <br /> ® 289 <br /> ® Ross R. Grunwald (p' 0 <br /> 3948 <br /> 11110A CAU." <br /> j Ross R. Grunwald, Ph.D. A oq- Date <br /> ' California Registered Geologist#3948 <br /> California Certified Hydrogeologist 4269 ,��R�D GFp�O <br /> GLEN �N <br /> WHITE <br /> ' Glen T. White, R.G. <br /> Senior Geologist sj N0. 6563 \Q. <br /> ' OF CAH <br /> American Geological Services, Inc. <br /> CA95DE-029 <br /> t12 <br /> i <br />