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B-12 Site Safety Plan July 27, 1992 A & M Market, Acampo, California QEC 92-120-2 SAF C. Storage 1. place the respirator in its storage box in a heat- sealed or resealable plastic bag Store flat, with the face piece and exhalation valve in an approximately normal position, to prevent the face seal from taking a permanent "set," 2 replacement components should be stored in sealed packages in a cool, clean, low-humidity location until ready for use WORK ZONES AND SECURITY MEASURES The Project Manager will call Underground Services Alert (USA) and the utilities will be marked before any excavation is conducted onsite Quorum assumes no responsibility for utilities not so located The area around the tank cavity will be designated as an Exclusion Zone Only essential personnel will be allowed into the Exclusion Zone Cones, wooden barricades, or a suitable alternative will be used to deny public access to the Exclusion Zone The general public will not be allowed close to the work area under any conditions. If for any reason the safety of a member of the public (e g , motorist or pedestrian) may be endangered, work will cease until the situation is remedied Cones and warning signs will be used when necessary to redirect motorists or pedestrians EXPOSURE MONITORING PLAN It is not anticipated that project personnel exposure will exceed the TLVs or PELs of the P P 3 P P materials; however, proper personal protective equipment will be worn while working at the site In addition, the work area will monitored using a photoionization detector (PID) to detect the concentration of the volatile hydrocarbons in the ambient atmosphere If the lowest TLV or PEL is consistently being exceeded in the breathing zone, then a respirator must be worn If the concentration exceeds 1,000 parts per million (ppm), the use 1 of a respirator is inappropriate and personnel must withdraw from the site POSSIBLE EXPLOSIVE ATMOSPHERES iGasoline has a flammable range from approximately 1.4 to 7 b percent in air One percent in air is equivalent to 10,000 ppm, thus the lower explosive limit (LEL) is 14,000 ppm Normally explosive levels may be reached in tanks, pits, or other confined spaces Any area lz