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,�'e« u � ,.•3',.+a�"' '" T� .a�_ ����� � .� .,Tf�. ',xx'"fr^ "" t'�', e;, �'� '''�-^s 'SC`y. �+F.v,�,r�. <br /> airc "` y,�.r. ",..s,.�.. � 5 d!; k'..'t"'"a Y� �, �.G�,Y i'F �''. �v,���s ,. ,i t,�"ri.;. ^F' „w y��,,�> f�yh. `,� •,,a e �� f:� :� s;'d, ,.. <br /> .��. ,."sem"' ..�.. .A- -�l.,S,v ..t::• xr - q'k1 ' yZ r r'----.1.. �"' .,.n �.,1'.a.. <br /> i <br /> l <br /> Site Safety Plan May 2, 1991 <br /> ARCO Station No. 2168, Stockton, California AGS 31009-IS <br /> If the lowest TLV or PEL is consistently being exceeded in the breathing zone, then a <br /> respirator must be worst. 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 EXPLASIVE ATMOSPHERE; <br /> Gasoline has a flammable range from approximately 1.4 to 7.6 percent in air. Propane has <br /> an explosive range from 2.2 to 9.5 percent in air. One pe.cent in air is equivalent to 10,000 <br /> ppm; thus the lower explosive limit (LEL)for gasoline is 14,000 ppm and propane has an <br /> LEL of 22,000 ppm. Normally explosive levels may be reached in tanks, pits, or other <br /> confined spaces. Any area suspected of containing potentially explosive levels of gasoline <br /> or propane will be evaluated with an intrinsically safe or explosion-proof combustible gas <br /> indicator(CGI). Personnel response will be based on the following action levels from CGI <br /> 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 /> 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 /> GeoSystems'personnel and subcontractors must immediately withdraw from the site. The <br /> hazard potential will be evaluated by Applied GeoSystems' management and a plan of <br /> action 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 /> trisodium phosphate ('ISP) solution. Steam-cleaning is an acceptable alternative. <br /> 'r <br /> 14 <br /> App/led GeoSysten?s <br />