ARCHIVED REPORTS XR0008511 - Laserfiche WebLink

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without having to steamclean eq.ivapment. The rig was operated by Joel Stapleton, with Steve Treadwell., helper Drilling commenced at 0845; an asphalt/concrete cutting tool was used to penetrate the surface blacktop It was replaced with a convention auger bit, and the hole was advanced to 5' bgl . -- drill cuttings consisted of about 2-3' of black sandy clay loam grading to slightly sticky brown clay_ At 5' depth, the drill bit plug was removed and a clean, conventional California modified split- spoon sampling assembly was filled with 3, 2"x 6' clean brass sample tubes which were supplied by Wm. Bunter & Assoc, The assembly was placed an the drill string, and a core was taken from 5' to 6' 6" by forcing it into the ground with the drive hammer_ The coring assembly was then removed from the augers, placed on a clean surface , and carefully opened under the direc-- tion of the geologist_ The bait insert was then lowered into the augers, and drilling continued- The geologist carefully examined & briefly described the removed core, and preserved one ( 1) brass tube as follows. the ends were quickly covered with teflon tape & sealed with plastic end caps driven securely over the tube The caps were then thoroughly sealed with duct tape, the tube was labeled and promptly placed an a covered ace chest for preservation ' Augering and sampling continued using the above procedure, with gores taken at 5' intervals from 10'bgl to 30' . There were no odors or other evidence of contamination noted Refer to PLATE X for a lithologic plot, blow counts and other details of the soi-I boring. Drill cuttings and unpreserved core material were placed in steel drums, which were properly sealed and labeled, and stored on site for .dater disposal Refer to PLATE X for a litho- logic plot & other details of the soil boring. ' The rig was then moved to the location for soil boring #1 as shown an PLATES VI &_Y11, and drilling commenced at 1020, using the same procedures as described above Soil samples were taken at 5' intervals from 5' bgl to 31' 6" bgl , which was the bottom of ' the soil boring Each core was examined, described, & preserved using the same methodology as described earlier. from about 15' bgl to 27' bgl, core material_ and drill cuttings appeared to be ' backfill from the removed tanks rather than indigenous material Refer to PLATE PI11 for the 1ithologac description & other details. No odors, staining, or other evidence of contamination ' were noted in any of the cores or drill cuttings. PLATT~ VIi1 as the l thologic plot of the borehole. The rig was then moved to the location marked for soil boring #2, J