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File No. 20-3978-01W23 <br /> KLEINFELDER <br /> February 6, 1997 <br /> ATTACHMENT B <br /> KLEINFELDER FIELD PROTOCOL <br /> B-1 FIELD PREPARATION <br /> Before performing work in the field, environmental staff reviews the scope of work, prepares <br /> a 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 <br /> used in the field. Underground Service Alert (USA) is also contacted (when appropriate) <br /> prior to field work and is apprised of the marked boring locations and the scheduled date of <br /> drilling. In addition, a utility locating firm is sometimes employed to check the boring <br /> locations. <br /> B-2 DRILLING AND SUBSURFACE SOIL SAMPLING <br /> B-2.1 Drilling <br /> Soil borings are advanced using a trick-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 <br /> soil samples. <br /> B-2.2 Qualitative Field Screening <br /> An organic vapor detector, such as a Photovac TIP using a photo-ionization detector (PID) or <br /> a Foxboro flame-ionization detector (FID), is used to provide a qualitative screening of each <br /> 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 such as 100 ppm isobutylene. Ambient air is used to set the <br /> 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 <br /> 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 while drilling the borings. Total <br /> ionizable hydrocarbon readings in excess of 1 ppmv may necessitate respiratory protection for <br /> the affected crew members. This requirement is included in the complete field health and <br /> safety plan developed for the project prior to the start of field work. <br /> 20-3978-01.W231207PE047 Page R-1 0!997, Kleinfelder, Inc. <br />