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Jun 22 01 10:35a 06/16/01 NON 17:36 FAX— Ak 'q -A ATTACHMENT 8 OGEF4mr� P. Qlp Kt E I NFEL DT -R l3efore performing work in the field, environmental staff rMews the scope of work, prepares a health and safety plan, coordinates the work to be done with their supervisor, assembles the - -•- checks calibrates and - #nipment to be userx1 in the field. Underground Service Alert (USA) is also contacted (when appropriate) prior to field work and is apprised of the marked boring locations and the soWuled date of drilling, Ir, addit.jon, a utility locating firm is sometimes employed to check the boring locations. B-2.1 Geoprobe Procedures Gcoprobestsoil vapor probes will be driven and sarnpled by a subcontractor to KleinfUder. An attempt to pawiratc the subsurface at each location will be made. If such penetration is not possible, alternative investigative techniques may be used at an additional cost agreed upon by the client prior to commencement. SaWles will be collected in at;4ordwe with the proposal. DEE1=7 Soil borings are advwced using a truck -mounted drill rig, equipped with hoflow stem augers. Subsurface soil samples are collected from the soil borings. While (killing, = experienced .1 ajjjoqigt cj?.ssj'.V 94 t'�e soil. joj�. the stratipiTaphy of the borings, and collects soil M M Im mm -173 3n r --. f An organic vapor detector, such as a Photovac TEP using a photo--ionizatioa detector (PID) or a Foxbm flame -ionization detector (FID) is used to provide a qualitative screening of cach soil swnple collected from the borings. The organic vaW detector measures ionizablt compounds in the air in parts per million by volume (ppmv). Field calibration is performed using a calibrated span gas such as 100 -ppm isobutylene. Ambient air is used to set the instrument to zero. The soil contained in the cone of the sampler ar in a brass tube is exposed and screened with the organic vapor detector. The vapor reading is noted as the field screcningresult. 20-YP 1-63 1120 1 1 P 163 Page 9-1 Copyright 2W), Kkinfelder, IRC. June 14, 2001