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f <br /> such as canvas or cloth tennis style shoes are <br /> ( prohibitedlat construction areas . <br /> �J <br /> Chemicallyi�! resistant boot covers will be worn by <br /> field pers',onnel engaged in all contaminated soil <br /> operations`. <br /> o Respiratory Protection ! <br /> L; <br /> Respirator's, , full-face or half-face mask, with <br /> organic vapor/dust filter cartridges must be worn <br /> when requited b all <br /> q Y personnel engaged in all <br /> activities'',! in the contaminated areas . All <br /> personnel must be fit tested for the specific brand <br /> of respirator to be used. Sub-contractors will be <br /> C responsible for fit testing their employees and <br /> shall provide proper records on the fit test. A I <br /> respirator'l which has not been successfully fit- <br /> tested cannot be used by an individual on the <br /> project . ToJensure a proper fit, no facial hair <br /> will be allowed that will interfere with mask <br /> C operation . . Air purifying respirators will be used <br /> only if the following conditions are met : <br /> �l o The oxygen content of the air is greater than <br /> i <br /> 19 . 5%:: <br /> o Concentrations of air contaminants are known <br /> and monitored. <br /> o Most 'of the contaminants of concern all have <br /> good warning properties . <br /> o The protection factor is adequate and TLV' s <br /> are n'ot" exceeded . <br /> o If concentrations of air contaminants exceed <br /> IDLH value, personnel must immediately <br /> Levacuate. <br /> r <br /> o Cartridges are changed daily or whenever <br /> breakthrough occurs, whichever occurs first. <br /> o The . t6spirator is MSHA and NIOSH approved. <br /> o RESPIRATORY ' HAZARDS : There are two types of <br /> atmosphere's which present respiratory hazards: <br /> a . Contaminated atmospheres - Toxic materials can <br /> enter the body primarily in three ways : ( 1) by <br /> ingestion, through the gastro-intestinal <br /> L <br /> r: 7 <br /> Li <br /> I+ I <br />