ARCHIVED REPORTS XR0005781 - Laserfiche WebLink

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Michael Infurna, Sr. REHS from the San Joaquin County EHD, arrived at 1045 . After discussing operations with Mr. Hunter & TEG personel , he gave instructions to place a bentonite seal across the aquifer after completing each probe hole Grouting was to be performed after completion of operations Mr. Infurna left the site for other projects . After decontaminating all equipment, the probe truck was moved to P-2 , (see PLATE II, ) and the drill string, equipped with a clean sample barrel, was advanced to 18 ' bgl The sample chamber was opened and the tools driven to 1916" The core barrel was retrieved and lard on a clean work surface for examination by the geologist Recovery consisted of 1511 of brown to gray clay, slightly damp, very difficultly plastic, with a mottled appearance A 211 bed of loose, coarse, slightly damp gravel was noted from 1814" to 1816" There was no odor detected The bottom tube, from 19 ' -19 ' 6" was promptly sealed and delivered to the onsite lab for analysis A clean water sampling device was driven to 221 & allowed to set for 10 minutes A small diameter stainless steel bailer was lowered into the pipe on clean monofiliment line and retrieved muddy water, with no odor. Two VOAIs were filled and taken to the onsite lab for analysis Bentonite powder was poured into the hole to protect the aquifer, and all equipment was decon- taminated as described earlier The location for SP-3 was covered by a car, so the truck was mobilized on SP-4, on the north side of Country Club Drive, at 1150, see PLATE II for it ' s location The split-spoon sample barrel was pushed and hammered to 18 , bgl , the core barrel was opened and was driven to 1916" Recovery consisted of 15" of fine-to medium-grained gray water sand, abundant dark minerals gave it a salt & pepper appearance No odor—was noted, and the bottom sleeve was sealed and taken to the onsite lab The clean water sampling tool was driven to 2116" & allowed to set for 10 minutes . A clean stainless steel bailer was run into the tool, and recovered slightly muddy water, no odor was noted Two VOA' s were filled, sealed, labeled & taken to the onsite lab Bentonite powder was poured into the hole to seal the aquifer, and the truck was moved to SP-5 at 1205 hours Tools were advanced to 181 bgl, the core barrel opened, and a core taken from 181 -1916" Recovery consisted of 15" of fine-to medium-grained water sand as described for SP-4 . No odor was noted The bottom tube was preserved and delivered to t-he onsite 3