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3.2 PROTECTIVE EQUIPMENT <br /> 3.2.1 Protective Levels <br /> The following Protective Levels are defined by the United States Environmental Protection Agency(U.S. <br /> EPA): <br /> Level A• <br /> ■ The hazardous substance has been identified and requires the highest level of protection for skin,eyes,and <br /> the respiratory system based on either the measured(or potential for)high concentration of atmospheric <br /> vapors, gases, or particulates. <br /> ■ The site operations and work functions involve a high potential for splash, immersion, or exposure to <br /> unexpected vapors,gases,or particulates of materials that are harmful to skin or capable of being absorbed <br /> through the intact skin or substances with a high degree of hazard to the skin are known or suspected to <br /> be present. <br /> ■ Skin contact is possible or total atmospheric concentrations on direct reading instruments indicate 500 <br /> parts per million(ppm)to 1,000 ppm of an unidentified atmospheric substances. <br /> Type of Protection: Fully enclosed working environment ("moon suit"), with no exposed skin and self- <br /> contained air supply. <br /> Level B• <br /> ■ Should be worn when the type and atmospheric concentrations have been identified and require a high <br /> level of respiratory protection but less skin protection or the atmosphere contains less than 19.5%oxygen <br /> or total atmosphere concentrations on direct reading instruments indicate 5 ppm to 500 ppm of an <br /> unidentified atmospheric substances. <br /> Type of Protection: Skin is protected with chemical splash and fume resistant plastic coated coverall, and <br /> supplied air is provided by air lines to a full-face respirator. <br /> Level C• <br /> ■ Should be worn when the atmospheric contaminants, liquid splashes, or other direct contact will not <br /> adversely affect or be absorbed through any exposed skin or the types of air contaminants have been <br /> identified, concentrations measured, and an air purifying respirator is available that can remove the <br /> contaminants or total atmospheric concentrations on direct reading instruments indicate 0 ppm to 5 ppm <br /> of an unidentified atmospheric substances. <br /> Type of Protection: Skin is protected with a cloth or paper coverall and air is filtered using either a half-face <br /> or full-face respirator and appropriate air filter. <br /> Level D• <br /> ■ Should be worn when the atmosphere does not contain chemical hazards, or work functions preclude <br /> Ceres Associates Project CA519-2 <br /> Western Gravel Co.,Inc. 6 May 20,1999 <br />