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A. A work zone will be designated in the immediate area of the <br /> excavation where full protection equipment as previously <br /> specified will be required. <br /> B. A separate contamination reduction zone will be set up to <br /> provide an area for persoiji.cl to change out of Level B <br /> equipment. <br /> C. All unauthorized personnel. will be prevented from entering <br /> the work zone, or the immediate vicinity, from the time the <br /> excavation is started until the confirmation soil sampling <br /> analysis results are received indicating the objective soil <br /> concentration levels have been achieved. <br /> t � <br /> Working zone exposure will be monitored on a routine basis using <br /> �3 an HNu photoionizer. The HNu readings are to be maintained on <br /> � s <br /> site. <br /> r: The personnel protection level may be lowered after the initial <br /> excavation if the perimeter sample analysis as well as the HNu <br /> t � readings are within acceptable levels. <br /> f:0 In addition to the personnel protection specified, all excavation <br /> personnel will be covered by medical monitoring programs and will <br /> have received the 40 hour OSHA required training for workers <br /> participating in hazardous waste operations. <br /> ". 4.2 Public Safety <br /> Public health and safety considerations will be addressed by <br /> �., assuring that airborne dust or air emissions do not migrate <br /> beyond the work zone and that no physical hazards are created by <br /> the excavation. While some operation practices directed at the <br /> b� public health and safety issues have previously been discussed, <br /> the following is a listing of minimum measures to be taken at the <br /> �..a site: <br /> A. Access and Traffic Control <br /> In addition to the working zones being designated as dis- <br /> cussed in Section 4.1A above, additional barricades will be <br /> positioned to keep unauthorized personnel away from the <br /> excavation. This will include blocking of the adjacent <br /> sidewalks on Washington Street and Sutter Street. At night, <br /> or if the excavation must remain open for an unexpected <br /> length of time, the immediate area of the excavation will be <br /> - � barricaded with lighted barriers to prevent accidental <br /> I, access by individuals. <br /> 12 - <br />