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V 8.3 LEVEL C OPERATIONS jThe use of Level C protection at the Frontier Transportation property is not anticipated. Nevertheless, Level C protection shall be implemented in areas where task-specific air monitoring indicates that the action level is reached. Level C protective clothing will consist of the general protective gear plus air purifying respirators with organic vapor cartridges. Dust filters may be worn over the respirators will be utilized by equipment operators while full-face respirators will be required of ground personnel. in addition, personnel will wear surgical inner gloves, Nitrile outer gloves, nuke booties and tyvek or saran-coated tyvek coveralls (depending on moisture or splash hazard). In general, air purifying respirators are not recommended for use in environments with expected benzene contamination due to the poor warning properties of benzene. Tests have been performed to document the one percent breakthrough times of various chemicals (at 1000 ppm) through organic vapor cartridges. A 1 ,000 ppm level of benzene was determined to read breakthrough (10 ppm = 1 percent) at 73 minutes. It is not anticipated that - i this level of air contamination will be present during remediation activities at the site. To further protect site workers from possible exposure, a rigorous cartridge exchange program will be enforced. Respirator cartridges shall be change at least daily. 8A LEVEL B OPERATIONS The use of Level B protection at the Frontier Transportation property is not anticipated. However, Level B protection shall be used in areas where air monitoring for the target compound (benzene) indicates levels above the protection for factor given for air purifying respirators ( 10 times the TLV). Level B shall consist of all personnel - protective equipment described above in Level C operations with the substitution of a pressure demand SCBA with full face piece. The above levels of protection will be utilized during initial field operations. Upon receiving data from air, soil and water sampling, these levels of protection will be re-evaluated to provide sufficient employee protection while maximizing productivity. A situation may be present in which Level C respiratory protection is utilized while Level D clothing is used. Criteria for downgrading personnel protective equipment during field activities will be -! laboratory results indicating no potential for exposure above the Threshold Limit Value (TLV) for any site contaminant. �ll 9. SITE CONTROL 9.1 SITE SECURITY - No one will be allowed to enter a site work area unless they have been given permission to do so by the Project Manager and the Site Safety Officer, and otherwise follow applicable portions of this HASP. 9.2 DECONTAMINATION PROCEDURES In order to assure that contamination is controlled and not spread from the site, decontamination procedures j will be employed for both equipment and personnel. All decontamination activity will be monitored to assure compliance with the procedures described below. Decontamination of personnel and equipment will be required following the monitoring activities. Decontamination procedures will be developed for both equipment and personnel. A distinction will be made between personnel equipment and monitoring equipment for purposes of decontamination. 9.2.1 STANDARD DECONTAMINATION All field personnel exiting from the site must pass through a personnel contamination reduction corridor (CRC). At a minimum, all personnel exiting the site will remove all protective clothing and wash their face and L ]