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• contamination whenever possible If ambient air levels in the breathing zone <br /> exceed 50 ppm, full face respirators equipped with organic vapor cartridges <br /> must be worn <br /> 11.3 Flammable Vapors <br /> Presence of flammable vapors can pose a potential fire hazard and health <br /> hazard Hazard reduction procedures include monitoring the ambient air with <br /> an Oz/LEL meter If the LEL reading exceeds 20%, leave the site immediately <br /> and contact the Fire Department <br /> 11.4 Oxygen Enriched/Deprived Atmospheres <br /> Atmospheres that contain a level of oxygen greater than 23% pose an extreme <br /> fire hazard (the usual ambient oxygen level is approximately 20 5%) All <br /> personnel encountering atmospheres that contain a level of Oxygen greater than <br /> 23% must evacuate the site immediately and must notify the Fire Department <br /> 11.5 Noise <br /> When exposure to sound levels in the field personnel's ear ("A") scale, slow <br /> • response is likely to be in excess of 90 dbl for greater than 5 minutes or 85 dbl <br /> for greater than 30 minutes, noise protection shall be worn Thus, a sound level <br /> meter shall be present if these levels are likely to occur <br /> 11.6 Surface and Equipment Contamination <br /> Contact with contaminated surfaces, or surfaces suspected of being <br /> contaminated, should be avoided This includes walking through, kneeling or <br /> placing equipment in puddles, mud, discolored surfaces, or on drums and other <br /> containers Eating, smoking, drinking and/or the application of cosmetics is <br /> prohibited on this site in the immediate work area This reduces the Likelihood <br /> of contamination by ingestion <br /> 11.7 Exposure - Heat Stress <br /> Since climatic changes cannot be avoided, work schedules will be adjusted to <br /> provide time intervals for Intake of juices, juice products and water in an area <br /> free from contamination and in quantity appropriate for fluid replacement <br /> Heat stress may occur even in moderate temperature areas and may present any <br /> or all of the following <br /> • <br /> Avalon Environmental Consultants 9627-001-2 <br /> wKashmar Singh Joes Truck Stop <br /> October 20, 1998 19 Lathrop, California <br />