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Haight Road Tank Removal NOA Project Number: E07174A January 2008 13.0 DESCRIPTION OF SITE WORK ZONES 13.1 Work Areas 0 18 Should contamination be identified, work areas will be designated according to the recommendations in the U.S. Environmental Protection Agency's Standard Operating Safety Guides, revised June 1992. Three general zones of operation will be established in the field to reduce the potential for contaminant migration and risk of personnel exposure: • exclusion zone • contamination reduction zone support zone The work areas will be defined by flagging. If required, temporary fencing may be used. The exclusion zone is the area where contamination is identified. All personnel within it must use the prescribed levels of PPE. A checkpoint must be established at the exclusion zone's periphery to regulate the flow of personnel and equipment into and out of the area. Establishment of the exclusion zone boundary (hotline) is based upon the suspected presence of contaminated materials. The boundary may be adjusted based on subsequent observations and/or measurements of the contaminant concentrations and/or level of effort. Gross decontamination of personnel will occur in the work area, as required, with most personnel decontamination activities occurring in a decontamination area. Only authorized personnel with at least of 40 hours health and safety training meeting the HAZWOPER requirements and three days of supervised field experience are permitted within the exclusion and contamination reduction zones. The person entering the exclusion zone must be accompanied by a person who is able to: • Assist his or her partner. • Observe his or her partner for signs of chemical or heat exposure. • Periodically check the integrity of his or her partner's protective clothing. Notify the Environmental Engineer, his representative, or others if emergency help is needed. A decontamination area will serve as the contamination reduction zone for most Site activities and will serve as a buffer between the primary exclusion zone and the support zone. All decontamination procedures will be conducted in this area. Personnel will leave the support zone and enter the contamination reduction zone through a controlled access point. They must wear the prescribed PPE. Exiting the contamination reduction zone requires removing all contaminants through compliance with established decontamination procedures.