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7 .3 Zone Dissensions <br /> I <br /> Considerable judgement is needed to ensure safe working <br /> distances for each zone, balanced against practical work <br /> considerations . Physical and topographical barriers may <br /> constrain ideal locations . Field/laboratory measurements <br /> combined with meteorological condi ions and air dispersion <br /> calculations will assist in establishing the control zone <br /> distances . When not working in ar as that require the use of <br /> chemical--resistant clothing, work zone procedures may still <br /> need to limit the movement of pers nnel and retain adequate <br /> site control . <br /> 7 .4 Decontamination Procedures <br /> As part of the system to prevent oc reduce the physical <br /> transfer of contaminants by people and/or equipment from the <br /> site, procedures will be instituted for decontaminating <br /> anything leaving the Exclusion Zone and Contamination <br /> Reduction Zone. These procedures include the decontamination <br /> of personnel, protective equipment, monitoring equipment, <br /> clean-up equipment, etc . Unless otherwise demonstrated, <br /> everything leaving the Exclusion Zone should be considered <br /> contaminated. In general, decontamination at the Site <br /> consists of rinsing equipment with detergent/water solution. <br /> + Reusable decontaminated PPE will be stored for air drying. <br /> Decontamination is addressed in two ways : the physical <br /> arrangement and control of contamination zones , and the <br /> effective use of decontamination procedures . <br /> � The decontamination process uses cleaning solutions, followed <br /> by rinse solutions . Used solution, brushes, sponges, and <br /> containers must be properly disposed of . <br /> Decontamination Solution <br /> Description Usage <br /> 3 cups Alconox <br /> 1 cup sodium carbonate Light contamination <br /> 5-8 gallons water <br /> Commercial Detergent - organic contaminants <br /> Full strength or diluted <br /> k + <br /> 15 <br />