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' 72 Level D Operations Level 0 operations will include equipment operators and all site personnel working in the area of concern Level D personnel will wear work overalls or appropriate clothing, safety shoes, glasses, hardhat, and gloves, as required 73 Level C Operations Level C protection shall be used in areas where the action level is reached and in any areas contaminated with high levels of benzene This will be determined by onsite OVA readings Level C ' protective clothing will consist of general equipment consisting of steel toed boots, tyvek coveralls, chemically resistant boot covers, surgical inner gloves and nitrile outer gloves plus full-face air purifying respirators with organic vapors cartridges NIOSH approved cartridges will be used As it is not ' anticipated that Level C operations will be required, any incidence of the benzene action level will require demobilization and remobilization upon obtaining required personnel protection equipment 8.0 MEDICAL MONITORING PROGRAM A medical monitoring program has been instituted by TreaTek for all employees with potential exposure to hazardous substances An initial medical examination is given upon initiation of employment, ' annually thereafter and upon termination Medical examinations will verify that he/she is physically able to use protective equipment (including respirators), work in hot or cold environments and have no predispositions to occupationally-induced disease ' 90 AIR MONITORING AND SAMPLING Air monitoring of specific volatile organics will be conducted during operations During tilling of the soils and all sampling activities, the area of concern will be monitored with an OVA Background OVA samples will also be collected The breathing zone air monitoring will be conducted at respirable height (4 to 6 feet above the ground) utilizing an OVA (Reference Section 9 1) The data obtained will be used to determine whether average exposure exceeds applicable guidelines Draeger tubes will be used in addition to the OVA to establish the initial benzene level If detected, the benzene exposure limits will be applicable If not detected, the toluene exposure limits will be applicable ' 91 Equipment Monitoring of specific volatile organics will be conducted utilizing a F=oxboro Century Model 108 Organic Vapor Analyzer (OVA-18) calibrated to measure total ionizable hydrocarbons in parts per million by ' volume (ppm - v/v) as benzene 92 Analysis ' The OVA used for perimeter and work area monitoring provides volatile organic compounds as calibrated to benzene concentrations instantaneously 6