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91 GENERAL 9.0 SITE CONTROL Barricade tape and/or barricades shall be used to delineate a work zone for safety purposes around the work area The barriers should be set in a 25-foot radius (as practical) around the work area to provide sufficient maneuvering space for personnel and equipment A short piece of barricade tape can be affixed to a secure upright (e g , drill ng mast or vehicle antenna) to serve as a wand direction telltale A five-foot opening in the barricades at the support zone(upwind of the work area) will serve as the personnel and equipment entry and exit point The personnel decontamination station will be established at this point if formal decontamination procedures are required (see Section 9 0) All entry and exit from the work area will be made at this opening in order to control potential sources of contamination and leave contaminated soil and debris in the work area At the end of the shift, all boring/sampling holes and excavations must be covered or otherwise secured All cuttings and decontamination fluids are to be handled in accordance with relevant regulations and instructions from the PM The PM or SSO will determine an upwind evacuation area prior to each shift, and all personnel will be notified of its location A horn or other signaling device will be used to signal an evacuation in the event of an emergency Three blasts of the horn will be the signal to immediately stop work and proceed to the evacuation area The SSO will see that all site visitors sign the visitors' log and that all Dames & Moore personnel and site visitors who enter the work area do so only after presenting evidence of both their participation in a medical surveillance program and completion of health and safety training programs that fulfill the requirements of this plan The SSO will provide site hazard and emergency action information to all site visitors before they enter the site This can be done by providing a copy of this HSP to the visitor 9 2 WORK ZONES If monitoring instrument readings exceed the first Action Level (15 ppm > one minute), requiring the use of chemical protective equipment, work zones must be established as described below • Exclusion Zone — a 25 foot (as practical) circle around the work area will be defined before work starts The encircled area will constitute the "Exclusion Zone" This zone is where potentially hazardous contaminants and physical hazards to the workers will Mbe contained Appropriate personal protection as described in Section 1 0 will be required in this area Plastic sheeting (visqueen) and/or tarps may be used as necessary to control contaminated materials spilled to the ground during site AMFOREST 2 1 7 26