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Kennedy/Jenks Consultants 7.2 Work Zones All work on BNSF property will be conducted in a manner consistent with BNSF safe practices. Staff working on BNSF property will have proof of completion of BNSF Contractor Orientation/Safety training and proof of completion on an E-Railsafe background investigation. No staff will be present within 25 feet of any active track centerline at anytime during this project except for incidental crossing of tracks in order to perform work. Prior to crossing or fouling any active track, staff will look both directions on all tracks for approaching trains, move deliberately to clear the tracks as quickly as possible, and not carry any equipment or perform any function which may delay the safe clearing of the tracks. Work zones established for the purpose of hazardous materials-related work will not be required for this project. Staff not involved with field activities will maintain a safe distance from all work being performed. 7.3 Monitoring 7.3.1 Hazardous Substances While not anticipated at the Mormon Yard site, as appropriate, field personnel will perform air monitoring at least twice daily with a direct reading organic vapor analyzer(OVA, OVM or HNU) in the breathing zone at each work location. All readings shall be recorded in field logs. All direct reading instruments shall be calibrated according to the manufacturer's specifications. The following action levels will be used if air monitoring is conducted: • If OVA readings for a particular work area consistently exceed 5 parts per million (ppm) above background, then sampling will cease and personnel will withdraw from the work area. • If concentrations persist above 5 ppm, then Level C protection will be required if work is to continue. • If OVA readings exceed 10 ppm in the breathing zone while workers are in Level C protection, then work will cease and the source of the emission will be determined and eliminated before work continues. 7.3.2 Noise Field personnel will initially monitor noise levels associated with equipment and machinery with a direct reading portable noise level monitor unless based on experience, it is known that hearing protection is not necessary. Readings will be taken within the normal worker hearing zone. If maximum noise levels exceed 85 decibels at any time during site operations, hearing protection will be worn. BNSF Mormon Yard—Soil Sampling HASP Mormon Yard, Stockton, California Kennedy/Jenks Consultants©,March 2015 Page 13 g:4sgmupWminyoh\13tl3MM.00_hnsM4pmjadmmtaTp asp.dw