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i iM. 13.2 Organic Vapors The inhalation of volatile organic vapors during all operations can pose a potential health hazard. Hazard reduction procedures include monitoring the ambient air with a PTD and/or FID and use of Personal Protective Equipment indicated on Table II. Workers should stand upwind of the source of contamination whenever possible. If ambient air levels in the breathing zone exceed 100 ppm, full face respirators equipped with organic vapor cartridges must be worn. 13.3 Flammable Vapors ' Presence of flammable vapors can pose a potential fire hazard and health hazard. Hazard reduction procedures include monitoring the ambient air with an 02/LEL meter. If the LEL reading exceeds 20%, leave the site immediately and contact the s' Fire Department. 13.4 Oxygen ' Atmospheres that contain a level of oxygen greater than 23% pose an extreme fire hazard (the usual ambient oxygen level is approximately 20.5%). All personnel ' encountering atmospheres that contain a level of Oxygen greater than 23% must evacuate the site immediately and must notify the Fire Department. 1 13.5 Noise When exposure to sound levels in the field personnel's ear ("A") scale, slow response) ' is likely to be in excess of 90 Db for greater than 5 minutes or 85 Db for greater than 30 minutes, noise protection shall be worn. Thus, a sound level meter shall be present if these levels are likely to occur. It is anticipated that work within ten (10) feet of a drill rig will be 85 Db or greater. ' Sound level meter (SLB) readings will be performed whenever obvious noise sources call for measurements. The SLM readings will be used to determine the need for mandatory hearing protection. Once specific operations/tools are documented as producing noise levels that require hearing protection, the FSS may enforce the use ' of hearing protection whenever the operation takes place. ANSI-approved hearing protection must be worn during noise operations such as drilling. ' 13.6 Surface and Equipment Contamination ' Contact with contaminated surfaces, or surfaces suspected of being contaminated, should be avoided. - This includes walking through, kneeling or placing equipment in puddles, mud, discolored surfaces, or on drums and other containers. Eating, smoking, drinking and/or the application of cosmetics is prohibited on this site in the 16 immediate work area. This reduces the likelihood of contamination by ingestion. ' CRC Environmental Risk Management,Inc, Project#2100-250-2 American Savings Bank 222 North El Dorado Street April 6, 1995 24 Stockton.California ,r.