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to avoid bridging; the height of the sand fill was checked continuously with a tape. After placement of the sand, 2 buckets of bentonite pellets were poured down the annulus & wetted with about 5 gallons of water. The remaining auger flights were Pulled out of the hole, and the top of the bentonite seal was located at 63' , 2' above the sand pack & 5' above the top of the screen. Mr. Collins of the County EHD gave permission to delay grouting the annulus until after all wells had been placed. The casing was cut off slzghly below ground level, sealed with a Plastic cap, and covered with wooden pallets and a barrel which contained drill cuttings. After moving the rig off the location, the crew thoroughly decontaminated all auger flights & other equipment. The preserved soil samples, which had been placed in a sealed ice chest for preservation, were stored overnight in a large, locked commercial refrigerator in the warehouse which is well secured each night. Prior to leaving for the day, Mr. Hunter gave instructions to the rig crew that after cleaning equipment, they were to move to the spot marked for monitor well 06, (refer to PLATE X .dor its' location. ) • Aust 2 1994 - Wm. Hunter, RG, arrived on location at 0350, & Don Light of Del-Tech Geotechnical arrived at 0925. After decontaminating all drilling equipment, the rig had mobilized over MW-6 location, and drilled to 40 ' on the 22nd, before shutting down for the night_ Samples had been saved at 10 ' intervals for inspection; there was no reported odors, and a visual examination, of the drill cuttings did not show any evidence of contamination_ After moving some drums filled with spoil, a clean core barrel filled with new brass tubes was lowered into the flights & the first core was taken from 40' to 41' 6" . Recovery consisted of 15" of tan silty clay, very slightly plastic, with occasional inclusions of white root casts & sand grains. No odors or evidence of contamination were noted; a portion of the core place in a sealed plastic bag did not give a reading when tested with a PID meter. The bottom tube was Promptly covered with teflon tape & plastic end caps, sealed with duct tape, labeled & placed in the ice chest which had been stored over night on location. Michael Collins, REHS, from the San Joaquin County EHD, arrived at 0940, he reviewed the work, and left at 1015. The augers were advanced to 501 ; it was necessary to ream the hole continually in order to prevent the augers from sticking. A clean core barrel containing new brass tubes was lowered into the augers, and a core was taken from 50 ' to 51' 6" . Recovery con-- silted of 15" of tan to brown to gray dense silty clay; it had a 7