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KLEINEELaER <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 prior to field work with the <br />' marked boring locations and the scheduled date of drilling, in addition, a utility locating firm is <br /> sometimes employed to check the boring locations <br />' A-2 DRILLING AND SUBSURFACE SOIL SAMPLING <br />' A-2.1 Drillin <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 bonngs 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 Oualitative 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 The organic vapor detector measures ionizable compounds in <br /> the air in parts per million by volume (ppmv) Field calibration is performed using a calibrated <br /> span gas such as 100-ppm isobutylene Ambient air is used to set the instrument to zero The <br /> soil 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 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 safety <br />' plan developed for the project prior to the start of field work <br /> 1 <br /> t20-1417-16 E03/2411 R259 Page A I <br /> Copyright 2001, Klenfelder Inc February 28 2001 <br />