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8.2 WORK ZONES li If PID � requiring readings exceed the first criteria lin Section 6.1 re uirin the use $ of chemical protective equipment, work zones must be established as described below. This criteria is 15 ppm above background for more than one minute in the work area. o 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 be contained. Fl111 personal protection will be required in this area. Plastic sheeting (visquleen) and/or tarps may be used as necessary to control cuttings spilled to the grund during drilling operations. The size of the Exclusion Zone may be altered to accommodate site conditions and to ensure contaminant containment. 4 o Contamination Reduction Zone (CRZ) - a corridor leading from the Exclusion Zone will be defined, and will lead from the work area to a break area. All decontamination activities will occur in the CRZ. A waste container will be L3 placed at the end of the corridor so contaminated'! disposal equipment can be placed inside and covered. Surface/soil contamination in this area should be controlled using plastic sheeting. No Dames & Moore personnel will be permitted into the Contamination Reduction Zone or Exclusion Zone unless they are in full compliance with the requirements of this Plan. ', o Support Zone - a Support Zone, the outermost. P art of the site, must be defined for each field activity. Support ' equipment is located in this uncontaminated or clean area. Normal work clothes are appropriate within this zone. The location of this zone depends on factors such as accessibility, wind f direction (upwind of work area) , and resources ( .e. , ,roads, shelter, utilities) . I I C ' f ' I C CHEVMERC.H50 23 r l ,