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r — <br /> a <br /> K L E I N F E L D E R <br /> File No. 20-1147-56.E01 <br /> September 19, 1994 <br /> ATTACHMENT A <br /> XLEINFELDER FIELD PROTOCOL <br /> A-1.1 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) is informed of the boring locations and <br /> the scheduled date of drilling, or a utility-locating firm is employed to check the boring <br /> 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 /> Shallow borings may be advanced using a hand auger (as applicable). Subsurface soil <br /> samples are collected from the soil borings. During .drilling, an experienced environmental <br /> geologist or engineer 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) <br /> or a Foxboro flame-ionization detector (FID), is used to provide a qualitative screening of <br /> each soil samplecollected 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 /> protection for the affected crew members. This requirement is included in the complete field <br /> health and safety plan developed for the project prior to the startof field work. <br /> ETH.•md 14/94 <br /> Copyright 1994 Kleinfelder, Inc Page I of 3 <br />