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SITE HEALTH & SAFETY PLAN Toluene This material is a flammable, colorless liquid, with a benzol-like odor. The flash point is listed at 400F. The currently established TLV is 100 ppm in air. XYLENE This material is a clear liquid with a flash point of 100oF. The TLV is currently established at 100 ppm in air, and is currently under study as a possible carcinogen. It is currently not anticipated that the potential levels of exposure will reach PEL or TLV limits, but this is based solely on limited available specific information. It is planned that inhalation and dermal contact will be the potential exposure pathways of concern. Protective hand coverings, including outer and under gloves will be mandatory for all field operations personnel. In addition, respiratory protective devices shall be required to be available to each person in the Exclusion Zone, or within easy reach of those persons working in the Contamination Reduction Zone, should irritating odors or irritation of respiratory tract become detectable. The appropriate air-purifying respiratory protective devices, that are required to be available for all personnel working on-site, will be fitted with organic vapor cartridges and dust pre-filters, or with the high efficiency, organic vapor/HEPA stack type cartridge. Typically, if the respiratory protective devices are worn, the cartridge will need to be changed daily. If air monitoring at the breathing zone of the workers is recorded to be 50 ppm or more (for total organic compounds) , the Project Safety Officer will utilize colormetric tubes (Drager, Sensidyne, etc. ) for Benzene specification. Provided no Benzene is detected, the action level for increasing the level of protection from level D to level C (including respiratory protection) will be set at 200 ppm as measured at the breathing zone of workers. If Benzene is detected, at any level, respiratory protection will be required for all workers. 4