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