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C la}tori <br /> • Toluene <br /> rhi♦ material is a flammable, colorless liquid and has <br /> Maximum concentration in the; Buil = 0 050 ppm <br /> Flash point = 40°F <br /> - TLV in the air = LOU ppm <br /> - STEL = 150 ppm <br /> - OSHA PEL (8-hoar TWA) = 100 ppm <br /> - OSHA STEL = 150 ppm <br /> • .Yylene <br /> This clear liquid ha: <br /> - Mammum concentration in the soil = 0 73 ppm <br /> - Flash point = 100°F <br /> - TLV in the air = 100 ppm <br /> - OSHA PEL (8-hour TWA) = 100 ppm <br /> - OSHA STEL = 150 ppm <br /> 62 PHYSICAL HAZARDS <br /> The main physical hazards of deep excavations and soil aeration result from the <br /> following <br /> • Dangers presented by heavy equipment <br /> • Failure to maintain clearance for rotating excavators and backhoe <br /> • Working around excavated holes <br /> • Dust emission ingestion and inhalation <br /> Because we anticipate the final depth of the excavation to be between 8 and 1I <br /> feet, the excavation sidewalls will be sloped on a 1 1 ratio, thereby eliminating the <br /> risk of sidewall collapse and the danger of falling into the hole if the excavation <br /> hole is to be entered, safety procedures for working in confined spaces will be <br /> strictly enforced <br /> 70 RE UIRED PROTECTION <br /> At a minimum, Level D of protection will be applied in the work zone That is, <br /> field personnel and visitors are required to wear the following clothing and <br /> equipment• <br /> • Hard hat <br /> • Safety glasses <br /> • Safety shoes <br /> • Gloves <br /> • Hearing protection <br /> -4- <br /> 95 it 41 HEP <br /> 40 <br />