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• began leaking, or (3) the original size of the plume had extended offsite to the northeast, & has migrated to the southeast in the direction of groundwater flow. This latter scenario is supported by the lines of equal elevation maps as shown on PLATES XII & XIII_ July. 1994 - WJH submitted a workplan for placing three (3) additional wells on the property to further define the extent and direction of the plume; a copy of that workplan is included as 1FTMMIX E. The locations of those three wells, identified as MW-5, MW-6, & MW-7, are shown on PLATE V_ August. 1994 - The fourth quarterly sampling was performed, which continued to show a hydraulic gradient to the southwest, with MW-3 having the highest levels. DETAILS OF WORK EMEQRMED UNDE THE 49LY, 1994 WORKPLAN - PLACEMENT OFTHREE_ M_ ADDITIONAL GROUNDWATER MONITORING WELLS; August 2,2. 1994 - Wm. J. Hunter, RG, arrived on location at 0810 hours, and after meeting with Marc Paschini of Canteen Corp. , the locations of the three wells were marked according to the work- plan- At 0820, Spectrum Exploration auger rig & support truck arrived on location, & mobilized over location MW-5. The driller was Van Leonard, & the helper was Brad Lovell. The rig was equipped with 5' lengths of 10 1/4" OD hollow stem augers; there were enough clean flights to complete each well without decontam- inating. Sampling equipment consisted of a conventional 18" California modified split--spoon core barrel designed to hold 2" diameter metal tubes. After reviewing the workplan & safety procedures, drilling commenced at 0915. Don Light of Del.-Tech Geotechnical arrived at 0930, & calibrated a Thermodyne 580B PID meter for use in screening samples. A sample of drill cuttings from 20 ' was collected & placed in a sealed plastic bag to allow any volatile gases to escape. After setting for 5-10 minutes, the probe of the PID meter was inserted into the bag, & the meter turned on - it read aero. The augers were advanced to 30' , and another sam- ple was taken; it was bagged & tested in the same manner. The reading again was zero. At a depth of 40' , the drill plug was pulled, and a clean core barrel, filled with new, 2" x 6" brass tubes, was lowered into the augers, and driven from 40' to 41 ' 6" with a drive hammer. Blow counts, core recovery, description of the lithology, & other details are given on EXHIBIT XIV. The core was thoroughly examined & described by the geologist; one of the tubes was • promptly sealed with teflon tape & plastic end caps, the ends wrapped with duct tape, and the tube labeled and placed on ice- 5