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SMARKTHE <br /> inria .ROUP <br /> ENGINEERS & GEOLOGISTS, INC Site-Specific Health and Safety Plan <br />' CHEMICAL HAZARD ASSESSMENT <br /> • <br /> Hazardous/Toxic Chemicals or Materials Known or Suspected to be on Site <br /> Site IDLH PEL Where Expected Possible Route(s) <br />' Substance Concentrations Concentrations TLV to be Found of Entry <br /> Benzene unknown Ca 3000 ppm 1 ppm (2) soil (1) <br /> Ethyl benzene unknown 2000 ppm 100 ppm soil (1) <br /> Toluene unknown 2000 ppm 100 ppm soil (1) <br /> Xylene unknown 1000 ppm 100 ppm soil (1) <br /> t <br /> Notes <br /> (Ca) Possible Human Carcinogen <br /> (1) Routes of entry include inhalation, skin absorption, oral ingestion, and skin and eye contact <br /> (2) Measured in air <br /> iOther Hazards <br /> As part of the remediation system, a propane fuel tank may be present on-site Care should be taken to prevent any <br /> leakage from tank/fuel lines Additionally, the tank should be situated to minimize potential exposure to physical <br /> hazards Additionally, the tank should be grounded during the systems operations and during tank filling Alternately, <br /> fuel may be supplied as natural gas if readily available <br /> ATTACH ALL MATERIAL SAFETY DATA SHEETS AFTER THIS PAGE <br /> • <br />