ARCHIVED REPORTS XR0012685 - Laserfiche WebLink

Home Browse Search

r� i May 1, 1991 Site Safety I'la" AGS 511003-15 ARco Station No. 2130, Stockton, California If the lowest TLV or PEL is consistently being exceeded in the breathing zone, h use respirator must be worn- If the concentration exceeds 1,000 parts per million(ppm), of a respirator is inappropriate and personnel must withdraw from the site. pMMLE EXPLOSIVE ATMOSPHERES Gasoline has a flammable range from approximately 1.4 to 7.6 percent in air.Propane has an explosive range from 2.2 to 4.5 percent in air. One percent in air is equivalent o 10,400 ppm; thus the lower explosive limit (LEL)for gasoline is 14,000 ppm and propane is, or other LEL of 22.000 ppm. Normally explosive levels may be reached in tanks, p confined spaces. Any area suspected of containing potentially explosive levels of gasoline ith or e gas or propane will be evaluated ww intrinsically ebe based on the folowing act o x level from CGI indicator(CGI). Personnel response readings: Less than 10 then Continue activities and percent of LEL` monitoring 10 to 25 percent then Continue monitoring of LEL with extreme caution as higher levels are encountered Greater than 25 then Explosion hazard. per of LEL Cease activities and vacate area immediately t , * CGI readings in percent of lower explosive limit If an explosion potential is present onsite beyond 25 percent of the LEL then all Applied s GeoSystems' personnel and subcot.tractors must immediately withdraw from the site. The s' pe will l evaluated by Applied GeoSystems' management and a plan of hazard potentia I action will be assessed. DECONTAM[NAMON PROCEDURES al protective equipment will undergo gross decontamination Drilling equipment and person ' onsite. 'This gross decontamination will include washing contaminated equipment with a F i. . trisodium phosphate (TSP) solution. Steam cleaning is an acceptable alternative. { Y 14 AWIZPOY GeoSystemsis .