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September 23, 1993 Working To Restore Nature <br /> BP Facility No. 11191, Stockton, California <br /> it <br /> POSSIBLE EXPLOSIVE ATMOSPHERES <br /> Gasoline has a flammable range from approximately 1.4 to 7.6 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 /> 10 to 25 percent then Continue monitoring <br /> of LEL with extreme caution as <br /> higher levels are <br /> encountered <br /> Greater than 25 then Explosion hazard. <br /> Il percent of LEL Cease activities and <br /> vacate area immediately <br /> CGI xP <br /> n readings ipercent of lower explosive limit <br /> P <br /> If an explosion potential is present onsite beyond 25 percent of the LEL then all RESNA <br /> Industries' personnel and subcontractors must immediately withdraw from the site. The <br /> hazard potential will be evaluated by RESNA Industries' management and a plan of action <br /> will be assessed. <br /> DECONTAMINATION PROCEDURES <br /> Drilling equipment and personal protective equipment will undergo gross decontamination <br /> onsite. This gross decontamination will include washing contaminated equipment with a <br /> trisodiurn phosphate (TSP) solution. Steam-cleaning is an acceptable alternative. <br /> t <br /> 12or3-1 14 <br />