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s. <br /> _ December 4, 1989 <br /> Site Safety flan AGS 38032-35 <br /> Unocal Station No. 6981, Stockton, <br /> California <br /> POSSIBLE EYYLOSIVE ATMOSPHERES <br /> approximately 1.4 to 7.6 percent in air. One percent <br /> Gasoline has a 1lamniable range from <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 <br /> levin tanks, e itss ny <br /> of gasoline ne will be evaluated, or other confined spaces. with <br /> area suspected of containing potentially <br /> an intrinsicallysafe <br /> based�� ��°following actionbustible gas levels from CGlcreadingsator Gl) Personnel <br /> response will <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 /> percent of LEL Cease activities and <br /> vacate area immediately <br /> ' CGI readings in percent of lower explosive limit <br /> If an explosion potential is present onsite beyond 25 percent of the LEL then all Applied <br /> the se. The <br /> GeoSystems'personnel and subcontractors mesdtGe Sywithdraw <br /> tems ma agementnand aitpla of <br /> ' hazard potential will be evaluated by pp <br /> action will be assessed. <br /> DECONTAMINATION PROCEDURES <br /> Drilling equipment and personal protective equipment will undergo gross decontamination <br /> onsite: This dross decontamination will include washing contaminated equipment with a <br /> trisodium phosphate (TSP) solution. Steam-cleaning is an acceptable alternative, <br /> EMERGENCY RESPONSE PROCEDURES <br /> In the event of a fire, explosion, or property damage, the nearest Applied ['eoSysiems <br /> _—---------- - - <br /> --Branch-and the Administrative...OfCce will be immediately notified. If necessary, local fire <br /> _ or response agencies will be called. --, -— --- ----- <br /> :i <br /> 13 . <br /> Applied 000systems <br />