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� 1 <br /> VVZ1 INC. <br /> Decontamination Zones <br /> The SSO shall establish a decontamination corridor adjacent to and upwind from identified <br /> exclusion zones. The SSO shall set up both equipment and personnel decontamination areas <br /> outlined under "Decontamination Procedures" below. <br /> Support Zone <br /> The SSO shall establish support zones upwind from the decontamination corridor where all <br /> portable direct-reading air monitoring instruments read background, at a distance of at least 20 <br /> meters from the exclusion zone. <br /> The support zone shall be established such that support personnel may observe all personnel in <br /> the exclusion zone at all times. <br /> If personnel must enter trenches or other excavations, a"buddy" shall remain near the excavation <br /> to maintain visual contact("line of sight")with the pt rsonnel inside the excavation at all times. <br /> The SSO shall develop and teach all site personnel a ystem of hand signals that will enable the <br /> "buddy" to indicate to support zone personnel that an emergency exists inside the excavation. <br /> The SSO shall monitor the area at least every 15 minutes with the portable direct-reading air <br /> monitoring instruments to detect any changes in gas or vapor contaminant dispersion onsite. In <br /> addition,the Action Levels and corresponding Actions as described in the HSP shall be <br /> followed. <br /> If the wind changes direction and/or gas, vapor or dust contamination moves into the established <br /> decontamination or support zones in concentrations that exceed permissible Action Levels <br /> established by the HSP, then the SSO shall direct site personnel to move the support zone to the <br /> 08420010.001 APPENDIX III <br /> ' 11 <br />