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Table 1 Contaminants of Concern Profile <br /> 0 0 <br /> s B e <br /> Methane Pure methane is a colorless and Not Not Not <br /> odorless gas. It has practically no Applicable Applicable Applicable <br /> toxic effects below the flammable <br /> limits. While methane has no <br /> noticeable toxic effects, high <br /> concentrations can displace oxygen <br /> and serve as a simple asphyxiant. <br /> Hydrogen Hydrogen sulfide is a colorless, Ceiling 20 1 ppm 10 ppm <br /> Sulfide toxic gas that is identified by the ppm <br /> offensive odor of rotten eggs. It is <br /> heavier than air, flammable, and is <br /> generally a component of landfill <br /> gas. Hydrogen sulfide can cause <br /> irritation of eyes, nose and throat, <br /> beginning at approximately 10 ppm. <br /> Long-term exposure (30 minutes or <br /> longer) to high concentrations can <br /> cause drowsiness, staggering, and <br /> nausea which can lead to death, due <br /> to respiratory system failure. <br /> Leachate As refuse decomposes, a liquid Not Not Not <br /> material forms which can combine Applicable Applicable Applicable <br /> the chemical properties of all <br /> materials involved. The resulting <br /> fluid, referred to as leachate, could <br /> have a wide range of hazardous <br /> properties such as being flammable, <br /> toxic, or corrosive. However, the <br /> liquid normally is comprised mainly <br /> of water or other non hazardous <br /> ingredients <br /> Ca—Substances that NIOSH considers to be potential occupational carcinogens <br /> C—Ceiling <br /> NIOSH—National Institute for Occupational Safety and Health <br /> OSHA—Occupational Safety and Health Administration <br /> PEL—Permissible exposure limit <br /> REL—Recommended exposure limit <br /> STEL—Short-term exposure limit <br /> TWA—Time-weighted average <br /> TLV—Threshold limit values <br /> 1.3.2 Project PPE Levels <br /> See Table 2 for specific clothing required for each level of PPE for this site; see Table 3 for task-specific <br /> level requirements. Level D is the minimum acceptable level for sites. Upgrade to Modified Level D <br /> occurs when there is a possibility that contaminated media can contact the skin or work uniform. Upgrade <br /> to Level C occurs when the results of air monitoring reveals that air monitoring action levels have been <br /> exceeded. Upgrade to Level B occurs when the results of air monitoring reveals action levels have been <br /> exceeded(site personnel must have met training requirements). Workers must maintain proficiency in the <br /> use and care of PPE that is to be worn. <br /> 1-3 <br />