ARCHIVED REPORTS XR0001000 - Laserfiche WebLink

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• auger flights were removed from the hole, which was covered to prevent the possibility of sloughing or caving Drill cuttings & unused core materials were placed in metal drums for later disposal Refer to PLATE XVII for details of blow counts, lithology, core recovery, and other details While the augers & hydropunch tool were being decontaminated, the rig was mobilized on location "A" as shown on PLATE X Drilling commenced at 1350 hours under the direction of Wm Hunter, RG The first core was taken from 5'-61611, it consisted of 12" of 1/4" to 3/4" cobbles grading to tan to brown clay No odors were noted, and there was no reading on the PID meter from a portion of the core placed in a sealed plastic bag The next core, from 10'-1116", consisted of tan to brown silty clay, soft & slightly moist There were no odors or evidence of contamina- tion noted, but the PID meter recorded 3 2 ppm from a portion of the core placed in a sealed plastic bag. The next core, from 15'-1616" also did not have any odor or visible staining, but gave a reading of 5 7 ppm with the PID meter The following core, from 201-211611, again did not show any evidence of contamination, but gave a reading of 5 7 ppm with the PID meter The final core, from 251-261611, at approximately the capillary fringe, consisted of brown & blue clay with some silty sand portions A faint odor of unidentifiable origin was noted, the PID meter gave a reading of 17 5 ppm from a portion of the core which had been placed in a sealed plastic bag The above work was done according to WJH field procedures described earlier Preserved core samples were placed on ice in a sealed chest The hydropunch tool was made up, lowered into the augers, and driven to 29' bgl After setting for 15 minutes, a clean stainless steel bailer was run which recovered sufficient muddy water to fill a one -liter bottle and VOA's The water had an odor similar to degraded gasoline or sewage The water samples were sealed and labeled and placed in the ice chest with the soil samples Drill cuttings & unused core materials were placed in metal drums, labeled & sealed, and stored on site PLATE XVIII gives details of lithology, PID readings, and other pertinent details. After completion of the work, all four auger holes were thoroughly grouted with a cement/bentonite slurry under the direction of a representative of the San Joaquin EHD The preserved soil & water samples were transferred under chains of custody to Sherwood Laboratory for analysis Instructions were given to test all soil samples for BTEX (EPA 8020,) TPH-G (EPA 5030/8015M,) & TRPH (EPA 3540/8015M.) Soil samples from auger holes 'FAF' & "B" & monitoring wells #1 & #2 were also to be 10