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large hole was present 2 to 3-feet bgs. However, no water was observed entering the well from this hole. A tree root was observed protruding from the hole and tree roots were also noted during the brushing of t h e well. A casing seam was noted at 27-feet and appeared to be in good overall condition with no probable leakage evident. The cement bond log for this well indicated good cement from the SWI- of 8-feet bgs to 44-feet bgs, some cement from 44-feet to 53-feet bgs, and less cement from 53- feet 3- feet bgs to 59.9-feet bgs. Water apparently enters this well from a depth deeper than 44-feet bgs. The pump intake was located at a depth of 38- feet 8- feet bgs. Based on the information gathered on this well construction, this well does not appear to be a significant conduit for the vertical migration of MTBE in the site vicinity. In addition, this well appears to be sufficiently protected against shallow zone MTBE contamination due to the presence of a cement sanitary seal. For this reason, it appears that this well could be put back into service since no MTBE has been previously detected in water samples collected from this well. Water samples should, however, continue to be collected and analyzed from this well on a periodic basis to insure that this well continues to produce water not impacted by MTBE. 5.0 LIMITATIONS The descriptions of the wells include observations made by ASE and Zim Industries during the well preparation, and observations of the video logs made by ASE, Zim Industries and Welenco. Please note that the observations made from the video logs are limited by camera angles, build-up on the well casing and visibility though the water in the well. The descriptions of the wells are based on the interpretation of only the parts of the well that were visible during the video logging. Other interpretations of the visible features in the wells are also possible. Interpretations of the cement-bond logs were provided by Welenco. ASE's interpretation of the construction of the wells is based on Welenco's interpretation of the cement-bond logs. ASE makes no guarantee to the accuracy of the cement-bond log interpretations. If necessary, you may contact Welenco for further information on the interpretation of these logs. A copy of the actual video logs and cement-bond log data is available for review at ASE's Danville office. Please contact ASE if you would like to review this data. Franks One Stop Report — February 2001 -5-