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APPENDIX A <br /> KLEINFEI.DER FIELD PROTOCOL <br /> A-1 FIELD PREPARATION <br /> Before performing work in the field, environmental staff review the scope of work, prepare <br /> a health and safety plan, coordinate the work to be done with their supervisor, assemble <br /> the necessary sample containers, and check, calibrate and clean equipment to be used in <br /> the field. When underground utilities may exist at a site where subsurface soil samples are <br /> being collected, USA Underground is contacted with the boring locations and the <br /> scheduled date of drilling, or a utility locating firm is employed to check the boring <br /> locations. <br /> A-2 SUBSURFACE SOIL SAMPLING <br /> A-2.1 Drilling <br /> Subsurface soil samples are collected from soil borings. Soil borings are advanced using a <br /> truck-mounted drill rig, equipped with 8-inch hollow stem augers. The borings can be <br /> advanced vertically, or at an angle up to 45 degrees from vertical. During drilling, an <br /> experienced environmental geologist classifies the soil, logs the lithology and collects soil <br /> samples for laboratory analysis. A sample boring log form is attached at the end of this <br /> appendix. <br /> A-2.2 Decontamination of Equipment <br /> To reduce the potential for cross-contamination, augers and associated equipment are <br /> steam cleaned prior to drilling each boring. In addition, sampling equipment is cleaned <br /> with a trisodium phosphate wash and rinsed with distilled water prior to collecting each soil <br /> sample. <br /> A-2.3 Collection of Soil Samples <br /> ® Soil samples are collected approximately every 5 feet for field screening, lithologic logging, <br /> and potential chemical analysis. Samples are collected by advancing the boring to a point <br />