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1 k'q KLEINFELDER <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-21 Drilling <br /> Soil borings are advanced using a truck-mounted drill ng, 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 soil <br /> ' samples <br /> I <br /> A-2 2 Qualitative Field Screening <br /> ' An organic vapor detector, such as a Photovac TLP, 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 bonngs 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 /> 1 � <br /> 28699 E01 /5T03R627 Page A-I <br /> ' Copyright 2003,Kleinfelder,Inc April 22,2003 <br />