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7.3 Zone Dimensions Considerable judgment is need to ensure safe working distances for each zone, balanced against practical murk considerations. Physical and topographical barriers may constrain ideal locations. Field / laboratory measurements combined with meteorological conditions and airdispersion calculations will assist in establishing the control zone distances. When not working in area that require the use of chemical - resistant clothing, work zone procedures may still need to limit the movement of personnel and retain adequate site control. 7.4 Decontamination Procedures As part of the system to prevent reduce the physical transfer of contaminants by people and or equipment from the site, procedures will be instituted for decontaminating anything leaving the exclusion zone and contamination reduction zone. These procedures include the decontamination of personnel, protective equipment monitoring equipment, clean-up equipment, etc. Unless otherwise demonstrated, everything leaving the exclusion zone should be considered contaminated. In general, decontamination at the site consists of rinsing equipment with detergent water solution. Reusable decontaminated PPP will be stored for air drying Decontamination is addressed in two ways: The physical arrangement and control of contamination zones, and the effective use of decontamination procedures. The decontamination process uses cleaning solutions, followed by rinse solutions. Used solution, brushes, sponges, and containers must be properly disposed of. Decontamination Solution Description 3 cups alconox 1 cup sodium carbonate 5-8 gallons water Usage light contamination commercial detergent(full strength or diluted) organic contaminants As with all alkaline cleaners, continuous or repeated contact with the skin should be avoided If an employees skin becomes contaminated, he will move to the decontamination area and remove contaminated clothing, and wash with a mile soap detergent and water to remove any contaminant from the skin. He will then see a physician for possible medical treatment. A rinse solution will be used to remove the contamination solution and neutralize any excess decontamination solution.