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Contamination Reduction Zone: A formal decontamination zone <br /> should not be required during the preliminary investigation . <br /> However , an area will be designated in the event extreme <br /> gasoline contamination is encountered. The decontamination <br /> zone will be an area where personnel can clean protective <br /> equipment . A waste container will be placed outside of the <br /> exclusion zone so contaminated equipment can be placed inside <br /> and covered. <br /> Support Zone: A Support Zone , the outermost zone , must be <br /> defined for each field activity. Support equipment is located <br /> in this uncontaminated or clean area. Normal work clothes are <br /> appropriate within this zone . The location of this zone depends <br /> on factors such as accessibility, wind direction ( it should be <br /> up wind of excavation) , and resources (e .g. roads , utilities , <br /> shelter ) . <br /> Decontamination Procedures <br /> Petroleum hydrocarbon liquids and vapors are anticipated. Due to the <br /> volatile nature of hydrocarbons that may be encountered during the <br /> Initial excavation and sampling operations , decontamination of <br /> equipment and vehicles will be of minimal importance since the <br /> volatile hydrocarbons will rapidly vaporize . Therefore, no formal <br /> decontamination procedure will be followed with the exception of <br /> general cleaning no eating, drinking or smoking will be permitted in <br /> the exclusion zone . All personnel involved in work activities will <br /> be instructed to wash their hands , face , neck and forearms at the end <br /> of the work day . soap, water and towels will be provided at the site <br /> for this purpose . The field personnel will also be instructed to <br /> shower at home at the end of each work day. <br /> As work progresses , the nature of materials handled and the extent of <br /> contamination may possibly require formal decontamination procedures <br /> and delineated work/clean zones . However , we do not expect that such <br /> formal procedures will be necessary at this site and will only <br /> proceed at the Safety Officer discretion. In the event extreme <br /> contamination is encountered, decontamination of personnel , equipment <br /> and vehicles will be important to insure that contamination dose not <br /> spread to unsuspecting people and property . Personal decontamination <br /> mainly involves personal hygiene . Contamination should not be <br /> present on the skin if the proper protective methods specified in <br /> this plan are used. However all field personnel will be instructed <br /> to follow these guidelines to insure that contamination dose not <br /> remain on equipment , sample containers or in contact with their <br /> bodies . <br />