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sample periods. The groundwater monitoring summary report pre- <br /> pared by Dei-Tech is included as M IDIT C and copies of the <br /> laboratory analysis sheet & QC are attached as EXHIBIT O_ <br /> ANALYSTS OF GROUNDWATER SAMPLING TQ PATE: <br /> Based upon an analysis of all the information obtained to date aL <br /> this site, the following conclusions seem appropriate: <br /> 1. Although the data collected to date shows Lhe hydraulic <br /> gradient to be in a southerly direction, the changes in levels of <br /> contamination measured in the wells suggests that either the <br /> gradient direction is not stable, or another offsite source of <br /> contamination exists_ The lowering of the water table in Lhe S <br /> month period between the two measurements does not appear to be <br /> the primary cause of the increased levels. Additional measure- <br /> ments and sampling should help to clarify this issue. <br /> 2. The horizontal limits of contamination Lave noL been deLer- <br /> min.ed, and additional work will be required to delineate the <br /> ..zero" line. <br /> 3. The results of the next quarterly sampling, currently due, <br /> should provide much needed information to assist in planning <br /> future work. After that data has been analyzed, we will be <br /> better able to determine what course of action to propose. We <br /> do not believe that the data to date is definitive enough to <br /> proceed with additional work. <br /> DISPOSAL OF CONTAINERIZED DRILL CDTTiNUS 84 PURGE WATER= <br /> We have attached Hazardous Waste Manifests & other relevanL <br /> correspondence covering the disposal of 25 drums of drill solids <br /> and water from soil boring & monitor well placement and sampling <br /> operations which had been stored on the property since completion <br /> of the work. Those documents are included as EXHIBIT E. <br /> Groundwater removed from the wells during future testing and <br /> sampling operations will be contained in suitably marked sealed <br /> drums & stored on site pending future disposal. Your office will <br /> be notified when such disposal occurs. <br /> If you have any questions concerning this report, do noL hesiLaLe <br /> to contact our office at your earliest convenience. <br /> Sincerely, <br /> Wm. J. Hunter & Associates <br /> cc: Canteen Corp. <br /> CVRWQCB <br /> 2 <br />