REMOVAL_1998 - Laserfiche WebLink

Home Browse Search

Safety Procedures — Site Entry/Access -Prior to entering areas where drilling or excavation operations are taking _ place, personnel should be aware of the status of the operation and the possible levels of contamination. If there is a question, information will be available from the SSO. Excavation/Trenching -No persons may enter a trench or excavation deeper than 5-feet without proper shoring in place or the proper sloping of the walls of the trench or excavation. Excavating/trench procedures will comply with CAL-OSHA Competent Persons Act and Title 8 CCR 1504 and 1539-47. Fencine-Excavation/trenches will be properly fenced or taped and barricaded if they are to be — left open pending laboratory analyses. Monitoring -Monitoring will be done primarily using visual and olfactory methods. However, — field screening will be accomplished with a PID or TLV meter and Draeger tubes to check for airborne constituents such as benzene, toluene, ethylbenzene and xylenes. The PID or TLV meter shall be calibrated for 1 ppm benzene. — Egress- If airborne levels are determined to exceed the action limits (see next section) all personnel shall evacuate to a predetermined isolation zone. The SSO shall notify all personnel — onsite that levels have been exceeded and of proper evacuation procedures. A predetermined warning method shall also be established such as three short blasts of a car horn. Action Levels Action Level A: Action Level A is applicable for airborne benzene, toluene, ethylbenzene and xylene levels less _ than the time weighted average(TWA) exposure limits. The TWA exposure limits are: benzene 1 ppm, toluene 0.1 ppm, ethylbenzene 100 ppm, and xylene 100 ppm. Personal protective equipment for these areas should be level D (see Levels of Protection). Action Level B: Action Level B is for airborne contaminants exceeding the TWA exposure limits. If Action Level B is reached, respirators should be donned and personnel should retreat to the isolation zone, until further direction is given. A signal designated at the pre-work "tailgate meeting" will be used to — warn personnel of the need to retreat as previously described. Levels of Protection — Level C Level C protection should be used when the types and concentrations of respirable material have been assessed, the types of hazards are known, and employee protection will be assured.