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.3. Sampling Plan <br />This sampling plan is intended to document the procedural and analytical requirements for this <br />and any subsequent sampling events performed to collect soil and waste samples and to <br />characterize areas of potential contamination from the Sante Fe Road Disposal Site. This plan <br />was compiled after reviewing the US Environmental Protection Agency's, Region 9, guidance <br />document "Instructions for the One-time Sampling Event Sampling and Analysis Plan" dated <br />March 1998. <br />3.1. Sampling Methodology <br />Discrete sampling will be used to assess the burn ash and surrounding soils. The sampling will <br />be conducted by using either direct -push equipment or a tracked excavator to sample locations <br />shown on Figure 3. Authoritative protocol may be used to allow the investigator the flexibility to <br />move sampling locations, as necessary, to accommodate unforeseen field conditions. The <br />following outline describes the proposed sampling: <br />Direct push equipment will drive sampling tool down to approximately 25 feet (or <br />until contact between waste and native is encountered) to characterize the cover <br />thickness and waste thickness. Burn ash and soil samples will be cut from <br />acetate tubing used to line the sampling tool and capped. A total of 50 waste/ash <br />samples will be collected (two sample per location). One sample will be used as <br />a discrete sample which will be analyzed for CAM 5 (lead, nickel, cadmium, <br />chrome and zinc) the other sample used for compositing with others from a <br />specified area. <br />Areas will be defined for compositing samples for more extensive analysis. A <br />total of 10 composite samples are proposed. <br />Each direct -push sample or trench will be classified and logged by the Ninyo & Moore registered <br />geologist and samples will be collected by visually identifying debris through the clear acetate <br />liner of the sampling tool and then carefully cutting two 6 -inch samples from the tube and <br />capped. Once capped, the samples will be sealed, labeled and logged and packaged for <br />shipping back to CIWMB laboratory contractor, ExcelChem. <br />Reusable sampling equipment will be decontaminated between each sampling event by the <br />CIWMB consultant or their subcontractor. Decontamination will follow the procedures outlined <br />in Section 3.5 of this sampling plan. Personnel who collect samples will be required to change <br />their gloves between each sampling event. <br />3.2. Sampling Equipment <br />The following equipment will be necessary to perform the sampling <br />■ Direct Push Equipment <br />■ Geoprobe Acetate Sampling Liners <br />■ GMI 422 Gas Surveyor Instrument <br />CIWMB <br />■ Field log book <br />• Survey laths <br />• First aid kit and eye wash <br />15 <br />