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k" KLEINFELDER <br /> APPENDIX A <br /> TYPICAL KLEINFELDER FIELD PROTOCOL <br /> A-1 FIELD PREPARATION <br /> Before performing work in the field, environmental staff reviews the scope of work, prepares a <br /> health and safety plan, coordinates the work to be done with their supervisor, assembles the <br /> necessary sample equipment containers, and checks, calibrates and cleans equipment to be used <br /> in the field. Underground Service Alert (USA) is also contacted by the drilling subcontractor <br /> prior to field work with the marked boring locations and the scheduled date of drilling, in <br /> addition, a utility locating firm is sometimes employed to check the boring locations. <br /> A-2 DRILLING AND SUBSURFACE SOIL SAMPLING <br /> A-2.1 Drilling <br /> Soil borings are advanced using a truck-mounted drill rig, equipped with hollow stem augers. <br /> Subsurface soil samples are collected from the soil borings. While drilling, an experienced <br /> environmental geologist classifies the soil, logs the stratigraphy of the borings, and collects soil <br /> samples. <br /> A-2.2 Qualitative Field Screening <br /> An organic vapor detector, such as a Photovac TIP, using a photo-ionization detector (PID) or a <br /> Foxboro flame-ionization detector (FID), is used to provide a qualitative screening of each soil <br /> sample collected from the borings, when appropriate. The organic vapor detector measures <br /> ionizable compounds in the air in parts per million by volume (ppmv). Field calibration is <br /> performed using a calibrated span gas such as 100-ppm isobutylene. Ambient air is used to set <br /> the instrument to zero. The soil contained in the cone of the sampler or in a brass tube is exposed <br /> and screened with the organic vapor detector. The vapor reading is noted as the field screening <br /> result. <br /> For the protection of the drilling crew, the organic vapor detector also is used to measure the <br /> volatile concentrations in the breathing zone prior to and while drilling the borings. Total <br /> ionizable hydrocarbon readings in excess of I ppmv may necessitate respiratory protection for <br /> the affected crewmembers. This requirement is included in the complete field health and safety <br /> plan developed for the project prior to the start of fieldwork. <br /> 12280.GLAC/ST03PO10 Page A-I <br /> Copyright 2043,Kleinfelder,Inc. January 15,2003 <br />