Laserfiche WebLink
T <br /> $W INTERN,„kONAL TECHNOLOGY CORPORATION <br /> 2.1 Drilling Methodology <br /> IT will notify Underground Services Alert (USA) at least two working days before starting <br /> any drilling activities. This, in addition to studying utility maps will help insure that drilling <br /> activities will not encounter any underground utilities. <br /> Each day, prior to field work, the field geologist or IT site representative will conduct a <br /> j� tailgate safety meeting to ensure proper site safety precautions are identified and also to <br /> conform to the IT site specific health and safety plan (Section 3.0). <br /> i <br /> The borings will be drilled by a sub-contractor with a current C-57 license. All drilling will <br /> be performed with a steam cleaned, 8 O.D. inch hollow stem auger. The field geologist will <br /> determine the depth of the borehole and any special procedures necessary to manage any <br /> ► unusual or anomalous conditions (i.e. flowing sands). Boreholes are anticipated to be <br /> approximately 50 feet deep based on depth to groundwater information collected from wells <br /> adjacent to the site (MW-1 through MW-3). <br /> L <br /> y <br /> 2.2 Soil Sampling <br /> All subsurface materials will be described using the visual method of the Unified Soil <br /> Classification System (USCS) as described in United States Bureau of Reclamation document <br /> No. 5005-86. Samples will be collected utilizing a split spoon sampler advanced using a 140 <br /> lb. hammer. The sampler will contain brass tubes for collection of undisturbed samples. The <br /> sampler and brass tubes will be decontaminated by scrubbing with a non-phosphate detergent, <br /> triple rinsed with tap water, rinsed with methanol followed by a distilled water rinse. (Brass <br /> tubes pre-cleaned by supplier may be used.) Soil samples will be collected every five feet. <br /> L. Select vadose zone soil samples will be submitted for laboratory analysis in order to provide a <br /> t <br /> vertical hydrocarbon distribution profile. Additional samples will be collected and analyzed <br /> from the following locations in the well bore (if applicable): <br /> 1. The interface between the unsaturated and saturated zones. <br /> 2. Areas of obvious contamination (the number of samples collected per this <br /> condition will be at the discretion of the field geologist). <br /> 3. Areas exhibiting any other unusual conditions. <br /> MZ/o9-29-92/ENG/9783.NM 4 <br /> f <br /> ti <br /> t.. <br />