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C O N T R A C T O R S BALCH PETROLEUM & BUILDERS, INC. C.L. #396575 AB/C - 10 HAZ Chemical: If any of the symptoms listed above are encountered, evacuate the area and notify the Site Safety Officer. He/She will determine the proper action to be taken. Explosion: If the LEL reading from the Gastech is over 20% for petroleum hydrocarbons or 10% for oxygen, the tank will not be removed from the excavation. E.) Air/Environmental Monitoring: Because the tank has no history of leakage and no soil contamination is expected, the only air monitoring that will be performed will be performed with the LEL meter. The tank bungs will be kept closed except for the vent lines which will remain open during the vapor freeing process. All tank vapors will be vented to a minimum of 12 feet above grade and 3 feet above the roof of the existing buildings. F.) Confined Space Entry: Employees are prohibited from entering into confined space without a Permit to work in Confined Space. A confined space is defined as those where the ventilation is so poor that dangerous levels of air contamination and/or oxygen deficiency can occur, and it is difficult to get to or remove an injured worker because of the location or size of the openings. Examples of confined spaces are tank cars or trucks storage tanks, sewers, wells and shafts. Those authorized to issue a permit are Tom Balch, Bill Balch and Tom Evernden G.) Decontamination Procedures: Personnel engaged in trenching or excavation of potentially contaminated material will decontaminate by washing personal protective equipment, hands, and face with soap and water as necessary. H.) Securing of the Site: Barricades and caution tape will be placed around the immediate excavation and trenches. The work area will be fenced. All excavated material will be placed on and covered with visqueen. I.) Emergency Contingency Plan: