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i <br /> =ng equipment A 5-foot safety zone will be established around the perimeter <br /> excavation in which personnel will not enter unless permitted by the site <br /> safety officer <br /> Excavation security will be maintained through the use of established yard security <br /> gates and "Caution" tape will be placed around the excavation when the excavation <br /> is unattended A staging area will set aside for the storage of all nonessential <br /> equipment This location will be considered to be maintained as a clean area <br /> Equipment and personnel will be appropriately decontaminated before moving into <br /> this area from the excavation zone This staging area will be in a direction up wind <br /> of the excavation <br /> All site personnel will be expected to wear hard hats and steel-toed boots during site <br /> activities All fieldwork will be done in accordance with 29 CFR 1910120 and 8 CAC <br /> 1509 - 1547. Air monitoring will not be performed during site operations, unless <br /> deemed necessary by the Health and Safety Officer <br /> All sampling equipment used will be triple bucket washed and/or steam cleaned <br /> after use. Before the excavation equipment leaves the site, the Site Safety Officer <br /> will determine, by observation of the presence of dust on the equipment, how <br /> extensive and rigorous de-contamination procedures of the equipment will be <br /> All decontamination water generated during any procedures on site will be <br /> contained in 55-gallon drums Any stored wash water will be sampled and <br /> analytically tested. Results of the analytical tests will he used to determine proper <br /> • disposal methods <br /> 4.0 HAZARD ASSESSMENT <br /> In dealing with any hazardous or potentially hazardous substance, personnel must <br /> protect themselves from the four basic routes of exposure. inhalation, skin <br /> absorption, ingestion, and eye contact Due to the relatively low to moderate <br /> amounts of contamination associated with the excavation, and the drilling methods <br /> to be used, it is anticipated that level D protection will be sufficient to protect <br /> personnel <br /> Indlyidual Hazard-Evaluation -ir er ACGIJJ,1959-1990) <br /> •Gasolirie TWA = 300 ppm or 890 mg/m <br /> STEL = 500 ppm or 1,480 mg/m <br /> -Benzene TWA = 10 ppm or 30 mg/m <br /> STEL = 25 ppm or 75 mg/m <br /> •Toluene TWA = 100 ppm or 377 mg/m <br /> STEL = 150 ppm or 565 mg/m <br /> BRUNSING ASSOCIATES, INC ®0®�®® <br />