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• • k4 KLEINFELDER APPENDIX A ' KLEINFELDER FIELD PROTOCOL A-1 FIELD PREPARATION Before performing work in the field, environmental staff will review the scope of work, prepare a health and safety plan, coordinate the work to be done with their supervisor, assemble the ' necessary sample containers, and check, calibrate and clean equipment to be used in the field. Underground Service Alert (USA) also is contacted prior to work with the boring locations and ' the scheduled date of drilling, or a utility locating firm is employed to check the boring locations. ' A-2 DRILLING AND SUBSURFACE SOIL SAMPLING ' A-2.1 GEOPROBE PROCEDURES Geoprobes will be driven and sampled by a subcontractor to Kleinfelder. An attempt to penetrate the asphaltic concrete at each location will be made. If such penetration is not possible, coring ' will be performed at an additional cost agreed upon by the client prior to commencement. Samples will be collected in accordance with the proposal. A-2.2 QUALITATIVE FIELD SCREENING ' An organic vapor detector, such as a Photovac TIP, using a photo-ionization detector (PID) or a Foxboro flame-ionization detector (FID), is used to provide a qualitative screening of each soil ' sample collected from the borings. The organic vapor detector measures ionizable compounds in the air in parts per million by volume (ppmv). Field calibration is performed using a calibrated ' span gas. Ambient air is used to set the instrument to zero. The soil contained in the cone of the sampler is exposed and screened with the organic vapor detector. The vapor reading is noted as the field screening result. For the protection of the field crew, the organic vapor detector also is used to measure the volatile concentrations in the breathing zone prior to and during the installation of the Geoprobes. Total ionizable. hydrocarbon readings in excess of 1 ppmv may necessitate respiratory protection for the affected crew members. This requirement is included in the complete field health and safety plan developed for the project prior to the start of field work. 23-482276-B00/CR96S070 A-1 June 26 1996 Copyright 1996 Kleinfelder,Inc.