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i <br /> Gas/Vapor Monitoring Procedures 'i <br /> The greatest potential hazards to safety and health at this <br /> site include: ? <br /> f <br /> 'i <br /> 1) Exposure to chemical vapors - through inhalation <br /> 2) Exposure to chemical contamination - through skin <br /> —cont-act•-a-nd---i-ngesti`on I <br /> 3) Fire hazards due to flammable vapors <br /> , <br /> Ongoing air monitoring during project tasks will provide <br /> data to ensure that vapor concentrations are within <br /> acceptable ranges and will pr`f vide adequate selection <br /> criteria for respiratory and 'derial protection. <br /> * If PID/FID readings' exceed 100ppm, an air- <br /> purifying respirator with organic vapor cartridges ' <br /> must be worn by alli. site workers within any area <br /> where monitoring results exceed 100ppm. <br /> * If PID/FID readingsexceed 750ppm, level B <br /> protection will beirequired. Personnel must leave <br /> the site immediately and contact the Site Safety <br /> Officer or the Health and Safety Manager for <br /> further instructions. <br /> * Respirator cartridges will be changed once per day <br /> as a minimum. This; can be accomplished at the end <br /> of the work day during respirator decontamination. <br /> If odor breakthrough is detected while wearing the <br /> respirator or breathing becomes difficult, change <br /> cartridges immediately. <br /> MSDS INFORMATION <br /> Material Safety Data Sheets (MSDS) on all chemical <br /> substances encountered at thdsite shall be made available <br /> to all persons (including subcontractors) working at the <br /> site. These MSDS 's shall be enclosed within this site <br /> safety plan in Appendix E. <br /> For emergency situations not "specifically addressed by this <br /> site safety plan, refer to MDSD recommendations for action <br /> information. <br />