ARCHIVED REPORTS XR0009218 - Laserfiche WebLink

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' c) The remaining material will be described by the geologist in charge, and recorded on field logs . Any unused material & drill cuttings will be properly contained for storage and later disposal . ' 4 After obtaining a soil sample at or near the capillary fringe, a hydropunch or similar type equipment will be pushed into the water table a sufficient distance to allow collection of a water sample for analysis A clean teflon or stainless steel bailer will be lowered into the hydropunch tool and the removed ' water will be placed in previously preserved glass vials for analysis Care will be taken to insure that there is no headspace in the vials, they will be labeled and preserved for analysis . 5 After completion of coring and sampling operations, auger hole "B" will be thoroughly grouted from bottom to the surface with a cement slurry under the direction of a representative of the San Joaquin County EHD If soil and water samples taken from auger holes "A" , "C° , & "D" (see PLATE I) reveal that no contam- ination is present, they will be converted to groundwater moni- toring wells as described below. However, if evidence of soil and/or water contamination is noted, they will not be converted to wells, but will be grouted in the same manner as auger hole I,$TI 6 Soil & water samples will be transported under chain of ' custody to a Certified laboratory, (either onsite or standard, ) with instructions to analyze for BETX (EPA 8020, ) & TPH--G (EPA 8015M, ) with MTBE distinction using detection limits as specified by the San Joaquin County EHD and CWQCB . ' If auger holes "A" , "C" , or ''D" do not reveal anysoil or water contamination, each, (or all, ) will be converted to monitoring ' wells as detailed below: 7 . After determining the potentiometric surface, estimated to be ' about 46 ' bgl, the augers will be advanced a minimum of 10 ' below water depth. 8 . 2" blank & slotted, flush screw-thread PVC casing) fitted ' with a screw-type bottom cap, will be run in the hole . Screen length will be 201 , and will extend from bottom to 10 ' above the water table . Slot size, to be 020" . When bottom is reached, the ' casing will be pulled up slightly to avoid the possibility of buckling or laying against the side of the hole . The annular space between casing & augers will be filled with clean, graded, #2 1/2 or #3 sand. The casing will be constantly vibrated during 6 I