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Class 2 Procedures <br /> These procedures are to be followed when the work in the space or location could conceivably <br /> ® cause some dangerous air contamination or oxygen deficiency. All work in confined space on a <br /> landfill is Class 2. <br /> ® 1. Testing as described above. Record all measurements and the locations they were made. <br /> ® Also record any relevant environmental conditions such as rain, wind velocity and direction, <br /> ® and temperature. Continue to test throughout the work at regular intervals or when the <br /> nature of the work demands. If dangerous air contamination could occur at any time during <br /> ® the work, testing should be continuous. <br /> ® 2. Disconnect or block off incoming lines that might cause problems. <br /> ® 3. Have ventilation on the site that is adequate to control any hazardous air contamination that <br /> ® could develop. Set it up so that it produces the maximum efficiency with the minimum of <br /> ® restriction at the access point. <br /> ® REMEMBER: <br /> ® 1. If flammable gases may be present, be sure the ventilation itself is explosion-proof. <br /> ® 2. Keep ignition source away from the exhaust of the blower or the space. <br /> ® 3. If a suction device is being used, position it so that the exhaust is out of the breathing zones <br /> �! of unprotected standby personnel outside the space. If a blower is being used, be sure standby <br /> ® personnel outside the space are protected from contaminated air coming from the space. <br /> ® Ventilation used must be adequate for the job. If pre-entry testing shows the space already <br /> contaminated to any degree, follow this purging procedure: <br /> ® 1. Safely purge the space until testing shows an uncontaminated or adequate oxygen atmosphere. <br /> ® 2. Turn off the ventilation and record the time. <br /> ® 3. Continue testing to see how fast the space re-contaminates. <br /> IMPORTANT! IF A SPACE BECOMES CONTAMINATED FASTER THAN <br /> ® WORKERS CAN SAFELY EXIT THE SPACE, EXIT THE SPACE AND DO NOT <br /> ® ENTER UNTIL YOU HAVE RESTORED SAFE CONDITIONS. <br /> ® 4. If re-contamination occurs only slowly or not at all, and the ventilation controls are adequate <br /> ® to control any problems that might develop, continue with the following precautions: <br /> ® 3 <br />