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File No. 20-3937-01 <br /> June 21, 1996 <br /> . 1 <br /> - <br /> ATTACHMENT A <br /> KLEINFELDER FIELD.PROTOCOL <br /> A-1.1 FIELD PREPARATION <br /> Before performing work in the field, environmental staff will review the scope of <br /> work, prepare a health and safety plan, coordinate the work to be done with their <br /> supervisor, assemble the necessary sample containers, and check, calibrate and clean <br /> equipment to be used in the field. Underground Service AIert(USA) is informed of <br /> the boring locations and the scheduled date of drilling, or a utility-locating firm is <br /> employed to check the boring locations. <br /> A-2 DRILLING AND SUBSURFACE SOIL S.aMP�T� <br /> A-2.1 Drilling <br /> Soil borings are advanced using a truck-mounted drill rig equipped with hollow <br /> stem augers. Subsurface soil samples are collected from the soil borings. During <br /> drilling, an experienced environmental geologist,.or engineer classifies the soil, logs <br /> the stratigraphy of the borings, and collects soil samples. <br /> a S <br /> A-2.2 Qualitative Field Screening <br /> An organic vapor detector, such as a Photovac TIP, using photo-ionization <br /> detector (PID) or a Foxboro flame-ionization detector (FID), is used to provide a <br /> qualitative screening of each soil sample collected from the borings. The organic <br /> vapor detector measures ionizable compounds sin the air in parts per million by <br /> volume (ppmv). Field calibration is performed using a calibrated span gas. <br /> Ambient air is used to set the instrument to zero: The soil contained in the cone of <br /> the sampler or in a brass tube is exposed and screened with the organic vapor <br /> 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 <br /> measure the volatile concentrations in the breathing zone prior to and during the <br /> drilling of the borings. Total ionizable hydrocarbon 'readings in excess of 1 ppmv <br /> may necessitate respiratory protection for the affected crew members. This <br /> requitement is included in the complete field health and safety plan developed for <br /> the project prior to the start of field work. <br /> 20-3937-0I/MP960068 Page A-1 41996,Kleinfelder, Inc. <br /> KLEENFELDER 2825 East Myrtle Street,Stockton,CA 95205-4794 (209)'948-1345 (209)948-06.21 -fax <br />