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Levine-Fricke-Recon Section:8 ' Date Initiated:September 23, 1996 Revision No.: 1 Date Revised:August 21, 1998 Page 23 of 34 ' 8.0 PERSONAL EXPOSURE MONITORING AND SITE-SPECIFIC ACTION LEVELS 8.1 Purpose The purpose of personal air monitoring is to quantify airborne concentrations of chemicals of concern in order to determine and verify the appropriate level of PPE necessary for workers to conduct activities at the Site. For the purpose of exposure monitoring, air samples will be collected from the breathing zone of site personnel. 8.2 Methods of Monitoring 1 A calibrated PID with a lamp intensity of at least 10.6 eV or FID will be utilized to evaluate worker exposure to total airborne concentrations of VOCs. The SSO, or designated representative, will conduct exposure monitoring at a minimum of 15- minute intervals during all intrusive activities at the Site. The instrument will be calibrated before the commencement of each day's activities and will be operated, and maintained, in accordance with the manufacturer's specifications. Background levels of VOCs will be verified daily to determine if off-site sources of VOCs are contributing to the readings indicated during routine exposure monitoring. Exposure monitoring ' data will be recorded on appropriate LFR Air Monitoring Forms. Documentation of exposure monitoring will be maintained on site for the duration of the project and will be transferred to the project files on completion of the project. ' Tasks that do not significantly disturb the surface of the earth, including, but not limited to, topographic surveying and installation of mini-piezometers, may be conducted without periodic exposure monitoring. 8.3 Site-Specific Action Levels The level of PPE required to conduct each site task will be determined by exposure monitoring results and site conditions. Action levels have been established based on the chemicals of concern identified at the Site, principally PCE and TCE, as well as the nature of scheduled activities. PCE and TCE have been identified as target chemicals for personal air monitoring because they have been detected at the highest concentration in soils and groundwater, have the lowest PELs of known contaminants at the Site, and are readily detected with the proposed direct reading instruments. The following action levels will serve as a guide in selecting the appropriate level of PPE for all operations at the Site. RIFSWP.AppF-Rev1-04111:SRL Page T'-23