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Mr Ronald Rowe March 25, 1998 Page 2 • clays From approximately 243 to 370 feet bgs the interbedded sand layers decrease in grain size as well as thickness It is unknown if all sand layers beneath the water table are interconnected, producing one unconfined water-bearing-zone or if some of the thicker clay layers act as aquxtards It is documented that at least one well (MW-1) screens across the water table (70-90 feet bgs) and has a total depth of 90 5 feet bgs The unused well is thought to have been installed in the 1950s and could have been as deep as 150 feet bgs (verbal communication, Mr Terry Tardstt), though construction specifications are not available T&T Trucking had the pump pulled on January 14, 1998 so a transducer could be installed for this momtonng event The depth of the unused well was tagged at 97 feet bgs and based on the measurement of pump rods, the pump was set at approximately 90 feet bgs T&T Trucking installed the supply well in 1992 with a total well depth of 247 feet bgs and a screen interval of 167 to 247 feet bgs See Figure I for the well locations Scope of Work Field work included • Pulled the pump from the unused well on January 14, 1998 The pumped was pulled by a T&T Trucking subcontractor • The unused well was allowed to rest a few days prior to the start of the monitoring • On January 16, 1998 total well depths and depths to water were measured in MW 1 and the unused well One In-Situ, Inc pressure transducer (PXD-260) was installed into MW-1 and one in the unused well several feet below the water surface Each transducer was connected to a Hermit data logger Water levels in MW-1 and the unused well were recorded by hand measurements using an electronic water level probe prior to starting the data logger • Each transducer was secured to prevent slippage of the cable In addition, the data logger was protected from tampering and weather • The test was stopped on January 23, 1998 and the transducers and Hermit were removed from the site Results The data loggers were set to record the head of water (above the transducer pressure sensor) every 15 minutes for a total of approximately 7 days The transducer installed in MW-1 is rated for 15 psig and the transducer installed in the unused well is rated for 30 psig The transducers are gauged (for atmospheric pressure) to correctly indicate a water level change, regardless of what caused the change iUse or disclosure of data continued on this sheet is subject to the restriction specified at the beginning of this document MEL1WPl627 I ICORRESKUR-2.DOC