ARCHIVED REPORTS XR0001000 - Laserfiche WebLink

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r� gravel, chunks of concrete, and dry, hard, tan to brown clay The first core was taken from 5'-616"; recovery consisted of fill material changing to tan to brown clay No odors were noted, but a bagged portion of the core gave a PID reading of 63 ppm Additional cores were taken from 10-11'6", 15'-16'6", 201--211611, and 251-261611, they were described, screened and preserved following WJH standard field protocol There were no odors noted in any of the cores or drill cuttings, and no readings were noted on bagged core samples screened with the PID meter Refer to PLATE XVI for details of blow counts, core recovery & lithology Drill cuttings & unused core materials were placed in metal drums, labeled & sealed, & stored on site for later disposal The hole was covered with a metal drum pending grouting after completion of the work The auger flights were decontaminated while the rig was moved and spotted on location "B", approximately in the center of the removed waste oil tank; (refer to PLATE X ) Drilling commenced at 1045 hours under the direction of Wm Hunter, assisted by Don Light of Del -Tech Geotechnical Support. The first five (5) feet of material consisted of pea gravel which had been used to fill of the site of the removed waste oil tank The first core was taken from 5'-61611, it consisted of 15" of brown to grey -green, wet, plastic clay which had a very faint petroleum odor The PID gave a reading of 2 4 ppm from a portion of the core placed in a plastic bag However, the meter may have been affected by paint fumes from the adjacent paint booth, and not inidicative of the bagged sediments A portion of the core was preserved as described earlier and placed on ice in a sealed chest Cores were taken at 10-11'6", 151-1616", 201-211611, & 251-26'6", they were described, screened and preserved using standard WJH field procedures. The last core, from 251-2616" was at or near the capillary fringe, it consisted of brown clay grading to blue clay, plastic and damp, but not wet No odors were noted in any cores below 61611, and the PID meter did not record any vapors in any screened core material A five foot long hydropunch tool was made up while the auger flights were advanced to 28' bgl The hydropunch was pushed to 33' bgl & allowed to set for 30 minutes A clean stainless steel bailer was run but could not recover sufficient fluid for preserving The hydropunch was retrieved, and while it was being decontaminated, the augers were advanced to 34' bgl & the tool pushed to 37' bgl at 1205 hours The tool was allowed to set until 1300, at which time a clean stainless steel bailer was run and obtained sufficient turbid water to fill a one -liter bottle and 3 VOA's The water samples were placed on ice in a sealed chest with the preserved soil samples The hydropunch tool & 9