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0 0 6.0 WORK ZONES AND SECURITY MEASURES 6.1 Site Security The Site is currently contained by a locked, chain-link fence and access to the public is restricted. Access to the work zones will be restricted to ENV America personnel and subcontractors. 6.2 Work Zones During field investigation activities, where there is a potential for exposure to MGP residues and where residues could be released to the ambient environment (via drilling or trenching), it may be necessary to establish work zones within the work areas. Each zone boundary will be marked using taping, cones, or other appropriate delineating devices. These zones will be specific to the area and task performed as follows: Exclusion Zone An exclusion zone will be established enclosing the work area. This zone will include the actual areas of work, the highest exposure areas, and/or the area in which probability of residue migration exists. The exclusion zone will be identified as the area immediately surrounding the work area extending radially for a distance of 20 feet or to a physical abatement preventing access. Equipment used within the exclusion zone will be cleaned of all gross contamination prior to leaving the exclusion zone. Contamination Reduction Zone A contamination reduction zone will be defined around the exclusion zone by means of a similar barrier system by extension of the radial distance from the contamination point an additional 10 feet or to physical abutment or other permanent boundary. A contamination reduction corridor and "step-off line" will be set up at the work zone access and egress points. The contamination reduction corridor will include an access route to the current work location from the equipment decontamination area and personal decontamination area. The personnel access point will be through a contamination reduction corridor adjacent to a personal decontamination area. All personnel entering or leaving the exclusion zone and work areas will pass through designated corridors to don or remove their protective equipment. Personnel will not be permitted to exit the regulated area until contaminated clothing and equipment have been removed and/or cleaned properly. The exit from the clean side of the decontamination area will allow egress to the clean or support zone or to an adjacent break area. A decontamination area will be established in the contamination reduction zone and all motorized and large equipment will be initially cleaned in this area and proceed to a main ENV~ 17 February 2005 A M E R ! C A P:\PG&E\PGE-05-01 Stockton MW26R Investigation\MW26 Work Plan\H&S\H&S Plan-2005.doc