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0 <br /> A- E <br />. Site Safety Plan Working To Restore Nature <br /> Unocal Station No 6981, Stockton, California <br /> i <br /> structures RESNA assumes no responsibility for utilities not so located The first 5 feet <br /> will be hand augered before any drilling equipment is operated <br /> Each of the areas where the bonngs will be dnlled will be designated as Exclusion Zones <br /> Only essential personnel will be allowed into an Exclusion Zone When it is practical and <br /> local topography allows, appro:umately 25 to 75 feet of space surrounding those Exclusion <br /> Zones will be designated as Contamination Reduction Zones <br /> Cones, wooden barricades, or a suitable alternative will be used to deny public access to <br /> these Contamination Reduction Zones The general public will not be allowed close to the <br /> work area under any conditions. If for any reason the safety of a member of the public <br /> (e g , motorist or pedestrian) may be endangered, work will cease until the situation is <br /> remedied Cones and warning signs will be used when necessary to redirect motorists or <br /> 1 pedestrians <br /> EXPOSURE MONITORING PLAN <br /> It is not anticipated that project personnel exposure will exceed the TLVs or PELs of the <br />�• materials, however, proper personal protective equipment will be worn while working at the <br /> site In addition, the work area will monitored using a direct-reading combustible gas <br /> analyzer or an organic vapor meter to detect the concentration of the volatile hydrocarbons <br /> in the ambient atmosphere <br /> 1 If the lowest TLV or PEL is consistently being exceeded in the breathing zone, then a <br /> respirator must be worn If the concentration exceeds 1,000 parts per million (ppm), the use <br /> of a respirator is inappropriate and personnel must withdraw from the site <br /> POSSIBLE EXPLOSIVE ATMOSPHERES <br /> Gasoline has a flammable range from approximately 14 to 7 b percent in air One percent <br /> in air is equivalent to 10,000 ppm, thus the lower explosive limit (LEL) is 14,000 ppm <br /> Normally explosive levels may be reached in tanks, pits, or other confined spaces Any area <br /> suspected of containing potentially explosive levels of gasoline will be evaluated with an <br /> intrinsically safe or explosion-proof combustible gas indicator (CGI) Personnel response <br /> will be based on the following action levels from CGI readings- <br /> Less than 10 then Continue activities and <br /> percent of LEL* monitoring <br /> 1� 38032-935 13 <br /> li <br />