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Site Safety and Health Plan Petroleum Hydrocarbon Contamination Terracon Project#67047008 Page 4 values. All respirators employed by Terracon personnel will be NIOSH approved. Cartridges and filters for air purifying respirators will be appropriate for the contaminant(s) of concern. Cartridge/filter selection will be made by the Terracon Corporate Safety and Health Manager. Project personnel required to wear respiratory protection will be medically cleared for respirator use, trained and successfully fit tested in accordance with OSHA 29 CFR 1910.134. Personnel required to wear supplied air respirators will demonstrate competence in donning/doffing and inspecting the equipment prior to job assignment. All project tasks requiring the use of supplied air respirators will require properly equipped backup personnel ("buddy system"). At a minimum, air purifying respirator cartridges will be changed daily prior to use. More frequent change of respirator cartridges will be based on the results of site air monitoring. Under no circumstances will air purifying respirators be used in areas deficient in oxygen (<19.5%), in areas classified as immediately dangerous to life and health (IDLH) or in areas where contaminants have not been characterized. Respirators will be inspected and required fit checks will be performed prior to use, and any necessary repairs will be made before proceeding to the project site. Respirators will be sanitized daily after use. 6.0 SITE HISTORY/SCOPE OF SERVICES Preliminary information obtained from the client indicates that this project site may be contaminated with petroleum hydrocarbons. The personal protective equipment and direct reading air monitoring protocols specified below are designed to prevent personnel exposure to contamination in excess of permissible exposure limits. 6.1 Scope of Services Soil/Groundwater Sampling _Soil Boring (Hand Auger) X Soil Boring (Drill Rig) _ UST Removal (requires tank removal addendum) _ Remedial System Installation- _Monitoring Well Installation Other( ) 7.0 HAZARD ASSESSMENT 7.1 Chemical Hazards Soils/groundwater at this project site may be contaminated with petroleum hydrocarbons. Benzene is the most significant health hazard contained in petroleum blends and typically comprises less than 1% of regular grade gasolines. Specific health hazard information on petroleum compounds and their most health-significant volatile fractions are provided below. Additional health-hazard information may be found in the chemical product information sheets attached to this Plan. Personnel engaged in monitoring well sampling are advised that organic