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k`■ KLEINFELDER <br />APPENDIX A <br />KLEINFELDER 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 10 -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 generally collected approximately every 5 feet for field screening, <br />lithologic logging, and potential chemical analysis. Because the six wells at Forward are <br />