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• tory under chain of custody by Don Light. Copies of the work- sheets and chain of custody are included as APP ' DII K; the results of that work will be discussed later May, 27, 199 - Osterberg & Stewart personel, installed heavy duty Christy boxes on all wells, cut of casings as needed, grouted the boxes in place, and filled any annular space in the casings with cement Locking caps were installed on each casing top, and the boxes were sealed with traffic covers. Junes—1, 1993 - The wells were developed by Osterberg & Stewart Personel according to standard procedures, refer to EXHIBITS X thru XIII for more details. June 3. . : 993 - Del-Tech Geotechnical Services purged and sampled each well as detailed in APPENDIX M Water depths were located at approximately 68' bgl , which corresponds closely with data obtained during the placement of the wells. After each well stabilized, water samples were taken by use of a clean, disposa- ble teflon bailer and placed in clean glass vials. Upon comple- tion of the purging, measurement and sampling operations, each casing was securely sealed with an expandable locking--type plug, and traffic covers were reinstalled and tightened. Water samples were transported under chain of custody to Sherwood Laboratory with instructions to test for BTEX & TPH-G. Refer to _APPENDIX L for details of that work. The top of each casing was notched and marked for orientation; a licensed surveying firm determined the elevation of each wellhead to within 1/10th of a foot; APPENDIX N is a copy of the field notes from that work. ISCUSSION OF RESULTS OF _LABORATORY SLY .E As discussed earlier, the five soil borings which had been drilled around the site of the removed UST encountered contamina- tion at depths below recent high groundwater levels. As a result of that work, four additional soil borings/monitoring wells were placed farther away from the former tank site, but still within the confines of the property Details of that work have been covered in some detail in this report. A fence diagram through the four monitoring wells was constructed to assist in analyzing the results; it is included as FLATE X1 . During the placement of the monitoring wells, some petroleum odors were detected in both the soil and water, and positive PID readings were noted in some cores. The results of the laboratory analyzes of those soil samples, summarized on TABLE VI , revealed 14