ARCHIVED REPORTS_2009_1 - Laserfiche WebLink

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K. SAFETY PROCEDURES FOR EXCAVATION, TRENCHING AND PIPE INSTALLATION 1 _ Excavation permits and shoring may be required for excavations deeper than ® 4 to 5 feet (into which workers will enter). Check state regulation_s as ® standards and requirements vary. 2. One person should be present at all times during construction with the sole responsibility to observe all safety procedures. This person shall be trained in ® the use of all recommended safety equipment. ® 3. Smoking shall be prohibited within 50 feet of trenching and piping. No smoking ® on the landfill is preferred. ® 4. Prior to the. entry of workers into -an excavation deeper than 3 feet, and ® periodically during their work, the atmosphere in the excavation should be ® tested. If there are any doubts regarding safety, no worker shall be allowed to .enter the excavation without at least a half-face or full-face OV/AG mask. if ® there is an oxygen deficiency, a concentration of any constituent with poor warning properties at a level greater than its TLV, or a concentration of ® hydrogen sulfide greater then 10 ppm, a pressure-demand SCBA or supplied air ® respirator with 5 minute emergency escape bottle should be used. If a ® combustible mixture of methane is present, further precautionary measures ® shall be taken; entry should be forbidden until the methane concentration is acceptable and at least below 1.0 percent by volume in air, or 20 percent of ® the LEL. If workers are not equipped with supplied air or pressure-demand ® SCBAs, then entry should be forbidden until the methane concentration is ® below 0.1 percent by volume in air, unless the Maximum Use Limitation (MUL) ® of the APR is greater. Workers required to work on an emergency basis, in any environment at or above the IDLH (the level immediately dangerous to life and ® health as declared and published by NIOSH) for any constituent component in ® the working environment, should be outfitted in pressure-demand SCBAs. ® 5. No worker should be allowed to work alone at any time in or near the exca- vation. Another worker shall be stationed, beyond the area considered to be ® subject to the possible effects of LFG. There should always be a sufficient ® number of workers present to remove an injured or endangered worker and to ® summon help. ® 6. Periodically during construction, the work area should be monitored for levels of methane, 112S, vinyl chloride, benzene, and other volatile organic chemicals. 7. No worker may handle excavated solid waste without wearing appropriate work ® gloves and clothing, which will provide an adequate barrier to the waste- ® 1: 19