N List of Acronyms
NAILED BRACKET SCAFFOLDS, Prohibited CSO, §1637(j)
Nailed Bracket Scaffolds, Illustration CSO, §1938, Appx B, Plate B-40
NAILERS & STAPLERS, Pneumatically-Driven     CSO, §1704 
Definitions CSO, §1704(a)
General Safety Requirements CSO, §1704(b)
Disconnecting Requirement CSO, §1704(c)
Air Hose, Securing on Sloped Roof CSO, §1704(d)
Safety Device CSO, §1704(e)
Code of Safe Practice Requirement CSO, §1704(f)
Trainers  CSO, §1704(g)
NAILS, Protruding from Floor/Platforms GISO, §3273(a)
NAILS, Strength & Required penetration  CSO, §1938, Appx B 
NALED, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NANKOR, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NAPHTHA, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NAPHTHALENE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NAPHTHALENE DNSOCYANATE
Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NAPHTHYLAMINE, α & β-Naphthylamine    See CARCINOGENS, Specified
NAPPER GISO, §4468
NARCOTICS
Alcohol & Drugs Prohibited at Mining Operations MSO, §6973(c)
Alcohol & Drugs Handling or Use Prohibited at Blasting or Pyrotechnic Operations GISO, §5247(b)
NATURAL GAS (NG) SYSTEMS, Compressed & Liquefied  UFPV, Article 7   
Alterations to Tanks, Piping & Vaporizers  UFPV, §526
Approval of Devices UFPV, §530
Charging/Filling of Tanks
CNG  UFPV, §528(b)
LNG UFPV, §528(c)
Controls of Products  UFPV, §527
Design & Construction 
Cylinder, CNG, per DOT Specifications UFPV, §456
Compressed & Liquefied  UFPV, §524
Tank, CNG & LNG UFPV, §455
Compressed & Liquefied  UFPV, §523
Vaporizers, LNG  UFPV, §457 
Filling of Tanks
CNG UFPV, §528(b)
LNG UFPV, §528(c)
Gauging Devices for LNG UFPV, §529
Monitoring during LNG delivery UFPV, §527(c)
Odorizing of LNG UFPV, §527(b) 
Repairs to Tanks, Piping & Vaporizers UFPV, §526
Smoking Prohibition, Transfer Operation UFPV, §528(a)
Transfer, Operation & Maintenance  UFPV, §528
Attendant Requirement UFPV, §528(a)(5)
Clearances from Objects UFPV, §528(a)(6)
Smoking Prohibition UFPV, §528(a)(2)
Venting UFPV, §528(a)(1)
Vaporizer Installation UFPV, §540
NAUGAHYDE WORKING MACHINES See LEATHER & COMPOSITION GOODS MACHINES
NEAT, Mechanical Execution of Work, Quality ESO-LV, §2340.12
NEEDLE-BEAM SCAFFOLDS  CSO, §1664
 ”          ”           ”            ”           ” See also SCAFFOLDS
NEMAGON (1,2 Dibromo-3-Chloropropane) (DPCP) GISO, §5212
Application & Scope GISO, §5212(a)
Definitions  GISO, §5212(b)
Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Appendices, Application of GISO, §5212(r)
Change Room GISO, §5212(j)(l)
Emergencies, Notification per §5203  GISO, §5212(d)
Emergency Plan See Also CARCINOGENS, Regulated GISO, §5212(i)
Exposure Monitoring  GISO, §5212(f)
General  GISO, §5212(f)(1) 
Initial  GISO, §5212(f)(2) 
Frequency  GISO, §5212(f)(3) 
Additional Monitoring  GISO, §5212(f)(4) 
Employee Notification of  GISO, §5212(f)(5) 
Accuracy of Measurement  GISO, §5212(f)(6)
Exposure to, as Airborne Contaminant GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Housekeeping / Cleaning  GISO, §5212(k)
Hygiene Facilities & Practices  GISO, §5212(l) 
Change Rooms  GISO, §5212(l)(1)
Showers  GISO, §5212(l)(2)
Lunchrooms  GISO, §5212(l)(3)
Sanitation  GISO, §5212(l)(4)
Prohibition of Activities GISO, §5212(l)(5)
Medical Surveillance  GISO, §5212(m)
Methods of Compliance  GISO, §5212(g)
Priority of Compliance Methods  GISO, §5212(g)(1)
Compliance Program  GISO, §5212(g)(2)
Notification of Use per §5203  GISO, §5212(d)
Permissible Exposure Limit  GISO, §5212(c)
Inhalation of airborne DBCP GISO, §5212(c)(1)
Dermal & Eye Exposure  GISO, §5212(c)(2)
Respirators  GISO, §5212(h)
General  GISO, §5212(h)(1)
Respirator program  GISO, §5212(h)(2) 
Respirator Selection  GISO, §5212(h)(3)
Protective Clothing & Equipment  GISO, §5212(j)
Training & Employee Information  GISO, §5212(n) 
Training Program  GISO, §5212(n)(1)
Access to Training Materials  GISO, §5212(n)(2)
Signs & Labels  GISO, §5212(o)
Record keeping   GISO, §5212(p)
Exposure Monitoring  GISO, §5212(p)(1)
Medical Surveillance  GISO, §5212(p)(2)
Availability of  GISO, §5212(p)(3)
Transfer of Records  GISO, §5212(p)(4)
Regulated Areas  GISO, §5212(e)
Establishment of  GISO, §5212(e)(1)
Demarcation & Segregation  GISO, §5212(e)(2)
Signs, Posting of  GISO, §5212(e)(2)
Access to GISO, §5212(e)(3)
Observation of Monitoring  GISO, §5212(q)
NEON, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NETS, Safety  CSO, §1671
Fall Protection, Conditional Alternative    CSO, §1669(b)
NEW EMPLOYEE TRAINING       See TRAINING
NEWS GATHERING (ENG) EQUIPMENT, Electronic ESO-HV, Article 40
Accident Prevention, Operation of ENG Vehicles ESO-HV, §2981
in Proximity of Overhead Power Lines
Definitions ESO-HV, §2980
Employee Training ESO-HV, §2982
Safety Inspections ESO-HV, §2983 
Variances ESO-HV, §2305.3
NIALATE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NICKEL CARBONYL, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Laboratory Safety GISO, §5191, Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management GISO, §5189, Appx A
NICKEL COMPOUNDS, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NICKEL METAL, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NICOTINE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NITRAPYRIN, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NITRATE & NITRITE BATHS, Metal Hardening GISO, §5188
NITRIC ACID, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management GISO, §5189, Appx A
NITRIC OXIDE , Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management GISO, §5189, Appx A
NITROANILINE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management GISO, §5189, Appx A
NITROBENZENE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NITROBIPHENYL, 4-    See CARCINOGENS, Specified
NITROCELLULOSE, Handling, Processing & Storage GISO, §5187
NITROCHLOROBENZENE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NITROETHANE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NITROGEN, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NITROGEN DIOXIDE
Diesel Engine Operation In Tunnels Monitoring TSO, §8470
Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Internal Combustion Engines Operation In Tunnels TSO, §8470
Process safety management GISO, §5189, Appx A
NITROGEN DIOXIDE, Testing, per TSO TSO, §8470(d)
NITROGEN OXIDES
Piping Systems for  GISO, §5195
Process safety management GISO, §5189, Appx A
NITROGEN TETROXIDE
Process safety management GISO, §5189, Appx A
NITROGEN TRIFLUORIDE
Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management GISO, §5189, Appx A
NITROGLYCERIN, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NITROMETHANE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management GISO, §5189, Appx A 
NITROPROPANE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NITROSODIETHYLAMINE, N-, Laboratory Safety  GISO, §5191, Appx A
NITROSODIMETHYLAMINE, N-    See CARCINOGENS, Specified
NITROTOLUENES, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A 
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NITROUS OXIDE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Hazardous substance GISO, §5195 
Piping Systems for  GISO, §5195
Process safety management GISO, §5189, Appx A 
NOISE, Control of Exposure GISO, Article 105
Application & Scope GISO, §5095(a)
Agriculture, Exempt from 5097 through 5100 GISO, §5095(a)
Construction, Exempt from 5097 through 5100 GISO, §5095(a)
Oil & Gas Well Drilling & Service, Exempt from 5097 through 5100 GISO, §5095(a)
Acoustic Calibration of Audiometers GISO, §5100, Appx D
Audiograms, Age Corrections to GISO, §5100, Appx F
Audiology Technician, Certification Requirement GISO, §5097(c)(3)
Audiometric Testing Program GISO, §5097(c)(4)
Audiogram Requirements per    §5097 Appx B GISO, §5097(c)(4)
Audiology Technician, Certification Requirement GISO, §5097(c)(3)
Baseline Requirement GISO, §5097(c)(5)
Baseline Requirements, Employee Notification GISO, §5097(c)(7)
Baseline Requirements, Employee Noise Exposure Limits GISO, §5097(c)(6)
Employee, Testing at no cost to GISO, §5097(c)(2)
Employer Responsibility GISO, §5097(c)(1), (2)
Employee Notification of Testing Results  GISO, §5097(c)(8)
Testing Performed By  GISO, §5097(c)(3)
Testing Results, Employee Notification of  GISO, §5097(c)(8)
Audiometric Measuring Instruments GISO, §5100, Appx B
Audiometric Test Rooms GISO, §5100, Appx C
Definitions  GISO, §5095(b)
Exposure Computation GISO, §5100, Appx A
Exposure Limits GISO, §5096
Hearing Conservation Program  GISO, §5097(a)
General Requirements GISO, §5095
Hearing Conservation Program GISO, §5097
Hearing Protector Attenuation, Estimating GISO, §5100, Appx E
Hearing Protectors GISO, §5098
Monitoring, Exposure  GISO, §5097(b)
Personal Protective Equipment, Noise Protection  GISO, §5098
Posting, Noise Standard in Article 105 GISO, §5099(b)(1)
Record keeping  GISO, §5100
Training Program GISO, §5099
General Training Requirements    GISO, §5099(a)
Access to Information & Training Material    GISO, §5099(b)
NONANE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NON-ASBESTIFORM, Tremolite, Anthophylite, Actinolite GISO, §5208.1
Change Room  GISO, §5208.1(e)
Clothing, Special  GISO, §5208.1(e)
Engineering Controls GISO, §5208.1(b)
Exposure limit GISO, §5208.1(a)  
Employee Notification GISO, §5208.1(k)
Work Practices GISO, §5208.1(c)  
Labels GISO, §5208.1(i)
Laundering  GISO, §5208.1(f)
Medical Surveillance GISO, §5208.1(j)
Monitoring  GISO, §5208.1(g)  
Permissible Exposure Limits GISO, §5208.1(a)  
Record keeping GISO, §5208.1(g)
Record, Transfer of GISO, §5208.1(m)
Report of Use GISO, §5208.1(l)
Respiratory Protective Equipment GISO, §5208.1(d) 
Signs GISO, §5208.1(h)
Training GISO, §5208.1(n)
Access to Training Materials GISO, §5208.1(n)(2)
NON-IONIZING RADIATION, Lasers, per CSO CSO, §1801
Beam shutters or caps CSO, §1801(e)  
Eye protection  CSO, §1801(c )
Exposure Limits, Light intensity CSO, §1801(j)
   ”                    ”                    ” Microwave power densities CSO, §1801(k)
Internal alignment lasers CSO, §1801(f)
Labeling Requirement CSO, §1801(e), (i)
Prohibition CSO, §1801(g)-(h)
Proof of operator qualification CSO, §1801(b)
Qualified & trained employees  CSO, §1801(a)
Trained & Qualified employees  CSO, §1801(a)
Warning signs & labels CSO, §1801(d)
NON-IONIZING RADIATION, per GISO GISO, §5085
Definitions GISO, §5085(a)
Exposure Limits GISO, §5085(b)
Warning Signs GISO, §5085(c)
NON-POTABLE WATER, Prohibited as drinking Water       CSO, §1524(b)(1)
Sign / Labeling, Non-potable Water CSO, §1524(b)(2)
Water, Potable Water Supply Section  GISO, §3395(c )
Maintenance of GISO, §3457(c)(3)
NON-RESIDENTIAL BUILDINGS, Wood Framing Systems CSO, §1716.1
NOTIFICATION OF CAL/OSHA
Accident Reporting, Injury & Fatality See Cal/OSHA, §342
Amusement Ride Accident GISO, §3920
Blasting Activities GISO§5248
Incident Notification MSO, §6960(a)
Lead work, Notification of disposal of Records  GISO, §5198(n)(5)
Notification of disposal of Records (NIOSH) CSO, §1532.1(n)(6)
Mine Incident, per MSO MSO, §6960(a)
Pressurized Worksite Operations GISO, §6075(a)
Tunneling Operations  TSO, §8422
Fatality TSO, §8420(c) 
Tunnel Classifications TSO, §8422
  Geological Information  TSO, §8422(a)
NOUGAT CUTTER, Food Service GISO, §4551
NOXIOUS GASES    See GASES, Control of
 ”             ”              ”    See GASES, FUMES, DUSTS, MISTS & VAPORS, Control of 
NOXIOUS WEEDS, Control of
Weed burner pressure hoses  CSO, §1697
NUCLEAR POWERED VESSELS & SHIPS
Ionizing Radiation Control, per SSO  SSO, §8397.1
NUISANCE PARTICULATES, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
NUMBER OF EXITS GISO, §3228