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File No 20-1008-52 A03 <br /> June 27, 1994 <br /> APPENDIX B <br /> KLEINFELDER FIELD PROCEDURES <br /> A-1 FIELD PREPARATION <br /> Before performing work in the field, environmental staff will review the scope of work, <br /> prepare a health and safety plan, coordinate the work to be done with their supervisor, <br /> assemble the necessary sample containers, and check, calibrate and clean equipment to be <br /> used in the field Underground Service Alert (USA) also is contacted prior to work with the <br /> boring locations and the scheduled date of drilling, or a utility locating firm is employed to <br /> 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 During drilling, an experienced <br /> environmental geologist classifies the soil, logs the stratigraphy of the borings, and collects <br />' soil samples <br />' A-2.2 Qualitative Field Screening <br /> An organic vapor detector, such as a Photovac TIP, using a photo-ionization detector (PID) <br />' or a Foxboro flame-ionization detector (PID), is used to provide a qualitative screening of <br /> each soil sample collected from the borings The organic vapor detector measures ionizable <br /> compounds in the air in parts per million by volume (ppmv) Field calibration is performed <br />' using a calibrated span gas Ambient air is used to set the instrument to zero The soil <br /> contained in the cone of the sampler or in a brass tube is exposed and screened with the <br /> organic vapor detector The vapor reading is noted as the field screening 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 during the drilling of the borings <br /> Total ionizable hydrocarbon readings in excess of 1 ppmv may necessitate respiratory <br /> ETH and 10194 <br /> Copyright 1994 Kleinfelder, Inc Page I of <br />