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466 Namw S"110 NATIONAL ADVERTISING COMPANY — ADDITIONAL SUBSURFACE 16NNESM;ATION HEALTH AND SAFF:T!- PLAN 10.0 SITE CONTROL AND WORK ZONES Earth Tech will manage site control for all work activities related to operation of the treatment system. 10.1 CONTROLLED WORK AREAS Controlled work areas will be designated around each work location where there is the potential for encountering physical or chemical hazards related to operation of the treatment system, or any Earth Tech work activity. Only personnel conforming to all requirements of this HASP are permitted access to controlled work areas. rr. 10.2 CONTROLLED WORK AREAS: DRILLINGISAMPLING During drilling operations and collection of groundwater samples there is an increased risk of contact with or release of site contaminants. Accordingly, requirements for controlled work areas will be more r. stringent for these cases. Each controlled work area will be divided into two sections, an Exclusion Zone and a Contamination Reduction Zone (CRZ). The Exclusion Zone is an area where work operations create the potential for skin contact with or inhalation of chemical contaminants, while the CRZ represents a pathway for entry/exit which provides a transition area for decontamination and PPE removal. Exclusion Zone limits must be sufficient to prevent anyone outside the zone from being exposed to any contaminated materials, or airborne contaminants released during work activities in excess of the action levels established in Table 7-2, as well as physical hazards due to the operations. The CRZ must be large enough to encompass decontamination activities and prevent unauthorized personnel from approaching closer than is safe, typically 10 feet away from all activities (decontamination, etc.) in all directions except toward the Exclusion Zone (where full PPE use is in effect). Typical distances for initial set up of the Exclusion Zone are: Drilling Operations (soil boreholes installation): Determine the mast height of the drill rig. This {,. height plus 10 feet (20 feet for powerlines) will be cleared in all directions from the borehole location. Soil Sampling Operations: if drilling activities are on-going, as specified for drilling. For other cases ten feet in all directions from the sampling location. Groundwater Sampling: Ten feet in all directions from the sampling location. Decontamination: Thirty feet in all directions from the decon location for large efforts (vehicle, drilling equipment, etc.) conducted at a decors pad. For personal and small parts decon conducted at the work location, keep decon activities within the applicable Exclusion/Contamination Reduction Zone established for that operation. Exclusion Zones should be delineated, where practical, using yellow "CAUTION" tape and/or fencing to 16w provide a physical barrier to any non -site personnel. Placement of vehicles can be used to provide additional security. The use of "CAUTION" tape (or other visible marker) to delineate the CRZ is not required so long as access to the area is limited to work personnel only. Additionally, all personnel �. should be alert to prevent unauthorized, accidental entrance into controlled -access areas (Exclusion Zones and CRZs). If such an entry should occur, the trespasser should be immediately escorted outside the area, or all work at that location must cease. All personnel, equipment and supplies which enter controlled - access areas must be decontaminated or containerized as waste prior to leaving (through the CRZ only). At the conclusion of all hazardous work location tasks, controlled areas must be properly cleaned so as to be nonhazardous ("clean") prior to discontinuing entry control procedures and PPE requirements. Once hslprojsuplcominachasp.doc 10-1 02/09/98 1+