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r <br /> c <br /> F. The calibration gas is hexane . The percentage by <br /> weight of I'hexane in gasoline is about 3% . The <br /> percentage . by weight of benzene in gasoline is <br /> �J about 4 . 90 : The lower explosive limit (LEL) for <br /> L both gases are close to 1% . These two <br /> L characteristics show that hexane calibrated <br /> equipment measuring total pertroleum hydrocarbons <br /> (gasoline) •would provide a good estimate of benzene <br /> levels . <br /> G. Should flammable vapors at or above 10% of the <br /> Lower Explosive Limit (LEL) be detected, work will <br /> stop and precautions will be taken to eliminate all <br /> potential sources of ignition from the area . (For <br /> example ; smoking materials ; non-explosion proof <br /> electrical and internal combustion equipment; all <br /> extension cords must be explosion proof) I <br /> Engineering controls capable of reducing the III <br /> flammable vapors to levels at or below l0% of the <br /> Lower Explosive Limit (LEL) before proceeding with <br /> any further work. <br /> I <br /> H. Volatile Organic Compounds (VOC) contaminated soil <br /> is a soil .: which registers 50 ppmv or more when <br /> measured with an organic vapor analyzer (calibrated <br /> using hexane) at a distance of no more than three <br /> inches above exposed soil . <br /> 17 . 0 OTHER SAFETY HAZARDS <br /> A. Work areaswill be barricaded to protect both the <br /> L' public and. workers . Work areas shall be kept clear <br /> L of stockpiled materials . <br /> Ct B. Soil shall be sprayed with water during loading <br /> i operations" to prevent emissions of particulates . <br /> D. Any soils ,that must be barreled on-site must have <br /> chemical analysis classification completed . <br /> Drummed soils will not be transported off-site <br /> without proper classifications . <br /> L E. The jobsite shall be inspected daily, prior to <br /> beginning work, and any existing damages to public <br /> propertyy not deemed the fault of, nor from the <br /> t operations of, the Company , shall be reported to <br /> the Client Contact , . and shall be noted on the Daily <br /> L <br /> Log . III <br /> Ir <br /> 11 i <br /> I <br />