Laserfiche WebLink
60 <br />B. Fire and Explosion <br />The presence of volatile liquids and vapors at this site presents the potential for fire or explosion <br />during the excavation. The following precautions will be taken during the project to prevent fire <br />or explosion: <br />1. There will be NO SMOKING within a So foot radius from the <br />source of any vapors. <br />2. The atmosphere at the site will be continually monitored for the <br />presence and concentration of flammable vapors and measurements <br />will be documented in writing. <br />3. Two 10 A-20 B:C fire extinguishers will be maintained on site <br />within 50 feet of the line of travel of the on -ground person <br />designated as fire watch at all times. <br />4. During refueling of vehicles and heavy equipment, the engines of <br />the equipment will be required to be off. There must be metal to <br />metal contact between the refueling equipment and vehicWheavy <br />equipment being refueled. No combustion sources will be allowed <br />with 25 feet of refueling operations. <br />PERSONAL PROTECTIVE EQUIPMENT <br />Level D PPE will be required on site at all times. The following table will guide upgrades from <br />this level of protection: <br />Consistent- Sustained <br />Breathing Zone <br />PID Readin¢ <br /><10 ppm <br />10 - 100 ppm <br />respirator <br />50 - 500 ppm <br />respirator <br />>500 ppm <br />Level D <br />Level D + half -mask air purifying <br />Level D + full -face air purifying <br />Level D + SCBA <br />Descriptions of the different levels ofprotection are found in Appendix A. <br />