H List of Acronyms
HAFNIUM, Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HAIR, Confined, Head Protection GISO, §3381
HALON FIRE EXTINGUISHER SYSTEM   GISO, §6181
HALOTHANE
Exposure limits  GISO, §5155, & Appx A 
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HAMMERS
Board Drop Hammers See under METAL WORKING MACHINES
Power-Driven & Air-Lift Hammer See under METAL WORKING MACHINES
HAND BAILING MACHINE GISO, §4473
HAND CHARGES, Avalanche Control See AVALANCHE, Snow Blasting
HAND DOLLY GISO, §3315
HAND DUMBWAITERS See under ELEVATORS 
HAND ELEVATORS See under ELEVATORS 
HAND FED PLANERS   GISO, §4311
HANDGUNS, Ammunition & Propellants GISO, Article 123
Application & Scope GISO, §5370
Ammunition Primers, Small Arms  GISO, §5374
Ammunition, Small Arms GISO, §5371
Black Powder Propellants GISO, §5373
Primers, Small Arms  GISO, §5374
Propellants, Smokeless   GISO, §5372
Storage  GISO, §5371(b)
Separated from Flammable Materials & Oxidizers GISO, §5371(a)
HANDHOLDS
Crane Boom Access, Guardrail / Grab-irons / Handholds GISO, §4926(b)
Dock Plates & Loading Ramps    GISO, §3337(d)
HANDLAMPS
Guards  ESO-LV, §2510.6
Handles ESO-LV, §2510.6
HAND-OPERATED LEVERS GISO, §4210
HAND POWER MAN PLATFORMS
Hoistway construction  GISO, §3095
Installations after 10-25-98 GISO, §3138
Machinery & Equipment  GISO, §3096 
HAND POWER TOOLS & EQUIPMENT GISO, §3556
Definitions GISO, §3555
Airless Spray Guns GISO, §3559.1
Controls & Switches for Portable Tools GISO, §3557
Employers Responsibility  GISO, §3556(a)
Handling Heavy Tools at Drilling Wells, per PSO-D&P PSO-D&P, §6607
Intended Use, Only used for  GISO, §3556(b)
Jacks GISO, §3562
Lawn Mowers, Power GISO, §3563
Pneumatic & Powder Actuated Tools GISO, §3559
Portable Winches GISO, §3564
Powder Actuated Tools Pneumatic & GISO, §3559
Prohibiting Use of Unsafe Hand Tools GISO, §3556(a)
Restricted Use GISO, §3556(b)
Safe Condition of Tools GISO, §3556(a)
Switches & Controls for Portable Tools GISO, §3557
Unsafe Tool Use Prohibited  GISO, §3556(c)
Use, Intended Use  GISO, §3556(b)
Winches, Portable GISO, §3564 
HAND PROTECTION GISO, §3384
per CSO CSO, §1520
HANDRAILS / HAND RAILINGS, per CSO CSO, §1620
Formwork and shoring CSO, §1717(d)(4)
Elevator shafts  CSO, §1633(a)
Floor openings    CSO, §1717(d)(4)
Metal scaffolds   CSO, §1644(a)(6)
Perimeters   CSO, §1717(d)(4)
Scaffolding
Metal CSO, §1644(a)(6)
Wood Pole, Heavy Trade   CSO, §1641(e)
Wood Pole, Light Duty   CSO, §1640(b)(4)
Wood Pole, Light Duty   CSO, §1640(c)(6)
Specifications, General GISO, §3209
Stairs(ways) CSO, §1626(c)(4)
Illustration CSO, §1938, Appx B, Plates B-17
Temporary Stairs(ways) CSO, §1626(d)
Wall opening   CSO, §1632(k)(i)
HANDRAILS / HAND RAILINGS, per GISO
Balconies    GISO, §3210(a)
Crane Boom, Access to GISO, §4926(b)
Design Requirements  GISO, §3209
Elevated Locations, Required at GISO, §3210
Elevating Work Platforms GISO, §3642(a)
General Requirements  GISO, §3209
Interlocked, revolving drums GISO, §4238(a)
Scaffolding
Tower, General Requirements GISO, §3622(f)(7)
Illustrations, Scaffolds   GISO, §1938, Appx B, Plates B-18 through B-22
Specifications for Stairs GISO, §3214
Stairs(ways) GISO, §3231(a)
Illustration GISO, §3231, Figure E-1
Stairs, Fixed Industrial GISO, §3234(g)
Standard Guard Railings, Specifications GISO, §3209
Wall Openings, at GISO, §3211
HANDRAILS / HAND RAILINGS & TOEBOARD, Exemption, per TelSO TelSO, §8602(b)
HAND SIGNALS, Logging Operations LSSO, §6402, Appx A
HAND TOOLS, CSO, §1699
Airless Spray Guns GISO, §3559.1
Controls & Switches for Portable Tools GISO, §3557
Defective, Remove from service CSO, §1699(a)
Electrical Power Hand Tools
Grounding, Electrical, Cord- & Plug-connected  ESO-LV, §2395.45(a)
Lifting / Hoisting by Electric Cord CSO, §1707(a)
High Voltage Operation ESO-HV, §2940.6(g) 
Hand Tools ESO-HV, §2940.6(g)
Inspection of Tools ESO-HV, §2940(b)
Life Line Tools ESO-HV, §2940.6(e)
General Safety Requirements 
Employers Responsibility  GISO, §3556(a)
Intended Use, Only used for  GISO, §3556(b)
Unsafe Tool Use Prohibited  GISO, §3556(c)
Grounding, Electrical, Cord- & Plug-connected  ESO-LV, §2395.45(a)
Handling Heavy Tools at Drilling Oil & Gas Wells PSO-D&P, §6607
High Voltage Operations, Used during  ESO-HV, §2940.6(g) 
Jacks GISO, §3562 
Logging & Sawmill Operations related LSSO, §6263
Pneumatically Driven Nailers & Staplers   CSO, §1704
Air Hose, Securing of CSO, §1704(d)
Code of Safe Practice Requirement CSO, §1704(f)
Definitions CSO, §1704(a)
Disconnecting Requirement CSO, §1704(c)
General Safety Requirements CSO, §1704(b)
Safety Device CSO, §1704(e)
Trainers  CSO, §1704(g)
Pneumatic Power Tool General Requirements CSO, §1707(b)  
Hose Connections, By Positive Means CSO, §1707(b)(1)  
Lifting / Hoisting by Hoses Prohibited CSO, §1707(b)(3)  
Safe Operating Pressure, Manufacturer’s CSO, §1707(b)(2)  
Pneumatic & Powder Actuated Tools GISO, §3559 
Portable Winches GISO, §3564
Power-Operated Hand Tools     CSO, §1707  
Lifting / Hoisting by Electric Cord Prohibited CSO, §1707(a)  
Pneumatic Power Tools CSO, §1707(b)  
Hose Connections, By Positive Means CSO, §1707(b)(1)  
Lifting / Hoisting by Hoses Prohibited CSO, §1707(b)(3)  
Safe Operating Pressure, Manufacturer’s CSO, §1707(b)(2)  
Powder-actuated tools  See TOOLS, POWER
Preventing Tools from falling CSO, §1699(b)
Prohibiting Use of Unsafe Hand Tools GISO, §3556(a)
Repairing Unsafe Tools CSO, §1699(a)
Restricted Use GISO, §3556(b)
Safe Condition of Tools GISO, §3556(a)
Special Hand Tools GISO, §3330 
Switches & Controls for Portable Tools GISO, §3557
Tree Work, for   GISO, §3426
Powered Hand Tools GISO, §3425
Winches, Portable GISO, §3564
HAND TOWELS, In Restroom / Washing Facility    GISO, §3366(e)
HAND TRUCKS  GISO, §3315
HAND WASHING FACILITY CSO, §1527(a) 
Adequate Water Supply GISO, §3363(a)
Non-potable Water use for, Prohibition GISO, §3363(f)
Posting / Labeling, Non-potable Water GISO, §3363(g)
Backflow Prevention, Non-potable Water GISO, §3363(h)
HANDY CONSTRUCTION DATA CSO, §1938, Appx B
HANGINGS, Decorative Materials GISO, §3217
HARBORS See MARINE TERMINAL OPERATIONS
HARD HATS
Logging Operations LSSO, §6255
Mining Operations per MSO MSO, §6980(b)
Sawmill Operations LSSO, §6255
Head Protection, per GISO GISO, §3381
From Flying or Falling Objects and/or Electric Shock GISO, §3381(a)
From Hair Entanglement GISO, §3381(e)
Required Markings on Approved Helmets GISO, §3381(d)
Selection and Use GISO, §3381(c)
HARD WIRING OF EQUIPMENT, Electrically, Exceptions Listed ESO-LV, §2500.8
HATCH COVERS, Fixed Ladder Clearances GISO, §3277(f)(7)
HAULAGE & EARTH MOVING, LOADERS, per MSO  MSO, §7012
HAULAGE & EARTH MOVING, General Requirements, per CSO CSO, §1590
Dust Control  CSO, §1590(b) 
Equipment Control CSO, §1590(c) 
Down Hill CSO, §1590(c) 
Speed CSO, §1590(c) 
Exhaust Gases/ Fumes CSO, §1590(d) 
Heat Shields CSO, §1590(e)
Private Roadways & Off-Highway Controls CSO, §1590(a)
HAULAGE VEHICLES & EQUIPMENT, per CSO
Definitions CSO, §1504
Air Tank Service CSO, §1591(d)
Audible or Visible warning, dumping CSO, §1591(k) 
Back-Up Alarms & Warning  CSO, §1592(a), (b)
Blocking / Locking, during Repair/work of CSO, §1595 
Brakes, Performance criteria CSO, §1591(c) 
Cab Shield. Haulage vehicles CSO, §1591(e) 
Cab protection  CSO, §1938, Appx C, Plate C-16
Cab Shield CSO, §1591(e) 
Canopy CSO, §1591(h)  
Control of Hazardous Energy during Repair, per CSO CSO, §1595
Diesel Engine Retrofits
Exhaust Retrofit, Definition CSO, §1504(a)
Access of Vehicle not Obstructed CSO, §1591(m)(2)
Engine Performance CSO, §1591(m)(1)
Installation of Exhaust Retrofit CSO, §1591(m)
Fire Hazard, Effectively Shielded  CSO, §1591(m)(3)
Hot Surfaces of Exhaust System, Operator Shielding from CSO, §1591(m)(4)
Obstruction of Operator's View CSO, §1591(m)(5)
Exhaust Stack Requirements CSO, §1591(m)(6)
Maintenance of Exhaust Retrofit CSO, §1591(m)
Visibility Testing Applied to Exhaust Retrofit CSO, §1591, Appx A
Dust Control  CSO, §1590(b) 
Employees, on foot, exposed to Vehicle Traffic CSO, §1590(a)(5)
Equipment, Construction & Maintenance  CSO, §1591
Equipment Control CSO, §1590(c) 
Down Hill CSO, §1590(c) 
Speed CSO, §1590(c) 
Exhaust Gases CSO, §1590(d) 
Exhaust Retrofit
Definition of CSO, §1504(a)
Access of Vehicle not Obstructed CSO, §1591(m)(2)
Engine Performance CSO, §1591(m)(1)
Installation of Exhaust Retrofit CSO, §1591(m)
Fire Hazard, Effectively Shielded  CSO, §1591(m)(3)
Hot Surfaces of Exhaust System, Operator Shielding from CSO, §1591(m)(4)
Obstruction of Operator's View CSO, §1591(m)(5)
Exhaust Stack Requirements CSO, §1591(m)(6)
Maintenance of Exhaust Retrofit CSO, §1591(m)
Visibility Testing Applied to Exhaust Retrofit CSO, §1591, Appx A
Exposure to falling or rolling objects CSO, §1591(h)  
Fenders CSO, §1591(f)  
Flaggers in lieu of back-up alarm & auto-brakes CSO, §1592(b)(3)(A)
Fueling CSO, §1594
Haulage Vehicle Operation, No Repair permitted during Operation of CSO, §1593
Hazard Signals, Emergency CSO, §1591(l)
Heat Shields CSO, §1590(e)
High Visibility Apparel Requirement CSO, §1590(a)(5)
Impairing visibility CSO, §1591(b) 
Lights CSO, §1591(g) 
Operating Levers CSO, §1591(i)
Operation of CSO, §1593
Private Roadways & Off-Highway Controls CSO, §1590(a)
Repair CSO, §1595
Rollover Protective Structures  CSO, §1596
Slings, use, care, maintenance CSO, §1593(n)
Seatbelts CSO, §1591(h)
Installation & Use CSO, §1596
Spotter in Lieu of Back-Up Alarms & Warning  CSO, §1592(b)(1)
Trip Handles for tailgates CSO, §1591(j)  
Warning Methods & device, backing vehicle CSO, §1592
Windshields  CSO, §1591(a)
HAULAGE VEHICLES, per GISO GISO, Article 25
Definitions applicable to Article 25, GISO GISO, §3649
Brake & Parking Brake Requirement GISO, §3661
Brakes & Warning Devices  GISO, §3661
Bulk Cargo Moving Vehicles GISO, §3666
Deflector Guards  GISO, §3654
Haulage Vehicles  GISO, §3666
Internal Combustion Engines, Use of  GISO, §3662
Operator Platforms GISO, §3658
Rated Capacity  GISO, §3660
Seatbelts  GISO, §3653
Warning Devices, Audible GISO, §3661
Wheel Guards  GISO, §3665 
Windows, Safety Glass, Rear Cab of Trailer-Spotting Tractor, GISO, §3666(c) 
HAULAGE VEHICLES, per MSO 
Canopy Guard  MSO, §7020
Construction & Maintenance MSO, §7016
Definition of Haulage Vehicle MSO, §7015
Haulage Vehicle Operation Procedure  MSO, §7021
Parts Subject to Wear  MSO, §7011
HAULAGE VEHICLES, per TSO TSO, §8483
Administrative Controls In Lieu of Backup Alarm TSO, §8483(a)(3)(C)
Backup Alarm, Automatic TSO, §8483(a)(3)(A)
Breaking Device, Automatic TSO, §8483(a)(3)(B)
Driver Location Means of Access  TSO, §8483(a)(5)
Driver’s Seat TSO, §8483(a)(5)
Flaggers in lieu of back-up alarm & auto-brakes TSO, §8483(a)(3)(C)
Forklift, Elevating Employees TSO, §8483(a)(8)
Haulage Vehicles Compliant w/ CSO TSO, §8483(a)
Lights, Head lights &Tail Lights,  TSO, §8483(a)(2)
Over Head Protection TSO, §8483(a)(7)
Prohibition, Employee Riding on, TSO, §8483(a)(1)
Role-Over Protection, Exemption for TSO, §8483(a)(6)
HAULAGE WAYS, per TSO TSO, §8484
HAULING, Loading & Dumping, per MSO MSO, §7010
Parts Subject to Wear  MSO, §7011
HAZARD ASSESSMENT See also Specific Work Activity, Substance, Process
Construction Operations, Before Employees Presence CSO, §1511(b)
Workplace Hazard Assessment, under IIPP  GISO, §3203(a)(4)  
Workplace Hazard Assessment, PPE Selection  GISO, §3380(f)
Employer's Written Certification GISO, §3380(f)(2)
Examples of Assessment Procedures GISO, §3380, Appx A
Personal Protective Devices, Equipment Selection GISO, §3380(f) 
Communicate to Effected Employee GISO, §3380(f)(1)(B)
Damaged/Defective PPE GISO, §3380(f)(3)
Properly Fitted PPE GISO, §3380(f)(1)(C)
Select PPE GISO, §3380(f)(1)(A)
Training  GISO, §3380(f)(4)
HAZARD COMMUNICATION (Hazcom) GISO, §5194
Application & Scope GISO, §5194(b)
Definitions GISO, §5194(c)
Appendices, Application of GISO, §5194(j)
Employee Information & Training GISO, §5194(h)
Hazard Communication Program, Written GISO, §5194(e)
Hazard Determination GISO, §5194(d)
Hazard Determination, Mandatory GISO, §5194, Appx B
Health Hazard Definitions GISO, §5194, Appx A
Importers, of Hazardous Substances 
Assess the hazards of substances they import GISO, §5194(b)(1)
Assess the hazards of substances they import GISO, §5194(d)(1)
Hazard Determination GISO, §5194(d)(1)
Labeling, Tagging, or Marking of Containers, Responsible for GISO, §5194(f)
Information Sources, Advisory GISO, §5194, Appx C
Labels & Other Forms of Warning GISO, §5194(f)
Manufacturers, of Hazardous Substances 
Assess the hazards of substances they import GISO, §5194(b)(1)
Assess the hazards of substances they import GISO, §5194(d)(1)
Hazard Determination GISO, §5194(d)(1)
Labeling, Tagging, or Marking of Containers, Responsible for GISO, §5194(f)
Material Safety Data Sheets GISO, §5194(g)
Proposition 65 Hazard Communication Requirements GISO, §5194(b)(6)
Reference Materials GISO, §5194, Appx E
Training  & Information GISO, §5194(h) 
HAZARD CONTROL
Harmful exposure GISO, §5141
Administrative Controls GISO, §5141(b)
Engineering control GISO, §5141(a)
Respirator protective equipment, permitted during;
Emergencies GISO, §5141(c)(3)
Failure of Administrative & Engineering Controls GISO, §5141(c)(2)
Installation of engineering controls GISO, §5141(c)(1)
HAZARD TAGS, Accident Prevention GISO, §3341
Application / Scope of §3341 GISO, §3341(a)
Definitions  GISO, §3341(b)
Biological Hazard Tags GISO, §3341(h)
Caution Tags GISO, §3341(f)
Color Coding for Tags GISO, §3341, Appx A
Criteria for Tags GISO, §3341(d)
Danger Tags GISO, §3341(e)
Design Criteria of Tags GISO, §3341(d)
Other Tags  GISO, §3341(i)
Use of Tags GISO, §3341(c)
Warning Tags GISO, §3341(g)
HAZARDOUS AREAS, Subject to PSO-D&P PSO-D&P, §6521
Control of Sources of Ignition  PSO-D&P, §6521(a)
Ignition Sources, Control of PSO-D&P, §6521(a)
Flammable Waste Gasses & Vapor PSO-D&P, §6524
Burning, Controlled PSO-D&P, §6524(a)
Control Hazards Associated with PSO-D&P, §6524(a)
Flares, use of PSO-D&P, §6524(a)
Flares, use of PSO-D&P, §6524(c)
Employees Entry Restriction PSO-D&P, §6524(b)
Remote Ignition, Controlled PSO-D&P, §6524(b)
Remote Ignition, Failure PSO-D&P, §6524(e)
Release of Gasses & Vapor Prevention PSO-D&P, §6524(d)
Remote Ignition, Controlled PSO-D&P, §6524(b)
Testing for Releases before Employees Entry PSO-D&P, §6524(e)
Spontaneous Ignition  PSO-D&P, §6522
Iron Sulfide Management  PSO-D&P, §6522(a)
Steel Wool, use with Lime  PSO-D&P, §6522(b)
Static Electricity, Control of PSO-D&P, §6523(a)
Grounding of Steel Derricks & Masts PSO-D&P, §6523(b)
Testing of Gas & Vapor PSO-D&P, §6531
Transfer of Flammable / Combustible Liquids
Compressed Air, Use Prohibited for Tanks PSO-D&P, §6525(a)
Exceptions listed  PSO-D&P, §6525(a)
Well Safety
Electrical Equipment PSO-D&P, §6527
Fired Equipment Restriction near Wells PSO-D&P, §6526(a)
Safety Provisions & Precautions  PSO-D&P, §6655 
HAZARDOUS ATMOSPHERES, In Excavations CSO, §1541(g)
Internal Combustion Engines, Operated Inside CSO, §1533(a)
Confined Space Requirements CSO, §1533(c)
Ventilation Requirements CSO, §1533(b)
Ventilation Systems, General Requirements CSO, §1530
HAZARDOUS CARGO     GISO, §3462
HAZARDOUS CHEMICALS See HAZARDOUS SUBSTANCES
                                             See also HAZARD COMMUNICATION (Hazcom)
                                             List See Cal/OSHA, §339
Labeling Requirements    GISO, §5194(f)
Training Requirements  GISO, §5194(h)
HAZARDOUS CONDITIONS, per CSO
General precautions,  CSO, §1511
Instructions for employees, CSO, §1510
Survey by employer to reduce hazards, CSO, §1511
HAZARDOUS ENERGY, Control of
Blocking, Machinery, Per CSO CSO, §1595
Blocking while Repairing    GISO, §3314(d)
Energized Equipment CSO, §1595
Equipment, due to Breakage/ Loosening/Falling Parts/Components GISO, §3328(e)
Lock-Out / Lock-Out per GISO GISO, §3314
  Accident prevention
Tags GISO, §3314(e)
Signs GISO, §3314(e)
Padlocks / seals GISO, §3314(e)
  Affected employees GISO, §3314(b)
Cleaning, Servicing & Adjusting Operation  GISO, §3314(c)
Hazardous energy Control Process GISO, §3314(g)
Inspection of GISO, §3314(h)
Repetitive Process Machinery GISO, §3314(f)
Training GISO, §3314(j)
Use of Outside Servicing Personnel GISO, §3314(i)
Lockout / Tag Out, Control of Hazardous Energy, per ESO
Accident Prevention Tags ESO-LV, §2320.6
De-Energized Equipment or Systems ESO-LV, §2320.4
Testing, Treated as Energized until Tested ESO-LV, §2320.3
Machinery, due to Breakage/ Loosening/Falling Parts/Components GISO, §3328(e)
HAZARDOUS EXPOSURE PREVENTION, per PSO-R,T&H PSO-R,T&H, Article 6
Allaying Dust, Fumes, Mists, Vapor & Gases PSO-R,T&H, §6788
Change Room, pursuant to Article 10, GISO PSO-R,T&H, §6787
Clothing PSO-R,T&H, §6786
Gases & Vapor Testing PSO-R,T&H, §6789
Personal Protective Equipment PSO-R,T&H, §6786
HAZARDOUS LIQUIDS, Physical Injurious Liquids (i.e. Burns, Chemical/Thermal  GISO, §3302
Cover or Otherwise Guarded GISO, §3302(a)
Personal Protective Equipment GISO, §3302(b)
HAZARDOUS (CLASSIFIED) LOCATIONS, High Voltage  ESO-HV, Article 34
General  ESO-HV, §2925
HAZARDOUS (CLASSIFIED) LOCATIONS, Low Voltage  ESO-LV, Article 59
Aircraft Hangars ESO-LV, §2540.6
Application / Scope ESO-LV, §2540.1
Approval of equipment ESO-LV, §2540.2(b)
Electrical Installations ESO-LV, §2540.3
Assembly places ESO-LV, §2551.2
Auto Body / Finishing Processes ESO-LV, §2540.9
Bonding ESO-LV, §2395.78
Bulk—Storage Plants ESO-LV, §2540.8
Class I, Zone 0, 1, & 2 Locations  ESO-LV, §2540.11
Commercial Garages, Electrical Installations & Equipment in ESO-LV, §2540.5
Conduits ESO-LV, §2540.2
Documentation of ESO-LV, §2540.2(a)
Electrical Installations  ESO-LV, §2540.3
Elevators ElevSO, §3112
Equipment Grounding   ESO-LV, §2395.45(a)
Finishing Processes ESO-LV, §2540.9
Illustration ESO-LV, §2540.9, Figure 1
Flammable and combustible liquids ESO-LV, §2540.8
Bulk-storage plants ESO-LV, §2540.5
Garages, Repair & Storage, Commercial  ESO-LV, §2540.5
Gasoline Dispensing & Service Stations   ESO-LV, §2540.7
Gas stations ESO-LV, §2540.7
General Requirements ESO-LV, §2540.2
Documentation of ESO-LV, §2540.2(a)
Intrinsically Safe Equipment ESO-LV, §2540.2(b)
Grounding of Equipment used in ESO-LV, §2395.45(a)
Intrinsically Safe Equipment, General Requirements ESO-LV, §2540.2(b)
Intrinsically safe equipment, Installations ESO-LV, §2540.3
Marine Terminal, Flammable Liquid Handling ESO-LV, §2540.8(b)(6)
Illustration ESO-LV, §2540.8, Figure 1
Marking equipment ESO-LV, §2540.2
Oil & Gas Wells, ESO-LV, Article 60
Drilling Wells ESO-LV, §2548.22
General ESO-LV, §2548.21
Lighting Systems ESO-LV, §2548.26
Overload Protection ESO-LV, §2548.24
Producing Wells ESO-LV, §2548.23 
Desander, Desilter, Illustration ESO-LV, §2548.23, Figure 6
Mud Tanks, Illustration ESO-LV, §2548.23, Figures 3
Mud Tanks, Illustration ESO-LV, §2548.23, Figures 4
Pump, Compressor, Illustration ESO-LV, §2548.23, Figures 11, 12, 19
Shale Shaker, Illustration ESO-LV, §2548.23, Figure 5
Vents, Misc, Illustration ESO-LV, §2548.23, Figures 13-18
Well Head Illustration ESO-LV, §2548.23, Figures 1-10
Wastewater Wells ESO-LV, §2540.10
Wiring Methods ESO-LV, §2548.25
Paint & Lacquer Finishing Operations ESO-LV, §2540.9
Illustration ESO-LV, §2540.9, Figure 1
Protection Techniques ESO-LV, §2540.4 
Service Stations & Gasoline Dispensing ESO-LV, §2540.7
Sewage wastewater wells ESO-LV, §2540.1
Special precautions ESO-LV, §2540.4
Wastewater wells ESO-LV, §2540.1
Wiring, Electrical   ESO-LV, §2540.2(a)
HAZARDOUS MATERIAL MANAGEMENT, per TelSO  TelSO, §8602(f)
HAZARDOUS MATERIALS, per MSO 
Labeling MSO, §6982(c)
Storage & Handling MSO, §6982(b)
HAZARDOUS PARTS, Machinery, Guarding of     GISO, §4184
HAZARDOUS SUBSTANCES, Acutely, List of, PSM Standard GISO, §5189, Appx A
HAZARDOUS SUBSTANCES, at Sites Subject to PSO-D&P PSO-D&P, §6542
HAZARDOUS SUBSTANCES, at Sites Subject to PSO-R,T&H PSO-R,T&H, §6821
Corrosives, pursuant to §5194 GISO, §5192
HAZARDOUS SUBSTANCES LIST See also Cal/OSHA, §339 GISO, §5155, Table AC-1
HAZARDOUS SUBSTANCES & PROCESSES  GISO, Article 109
Application & Scope GISO, §5160
Definitions  GISO, §5161
Acutely Hazardous Substances (List)  GISO, §5189, Appx A
                            See also PROCESS SAFETY MANAGEMENT
Airborne contaminants  GISO, §5155, & Appx A
M  tuberculosis protection  GISO, §5147
Aluminum, Combustible Metals  GISO, §5175
Batteries, Storage, Changing & Charging of See BATTERY CHARGING & CHANGING
Bloodborne Pathogens See under BLOODBORNE PATHOGENS
Body fluids, Contaminated  GISO, §5193
Butadiene  GISO, §5201
Carcinogens See also CARCINOGENS
Hazard communication program  GISO, §5194
Report of Use Requirements GISO, §5203 
Chemical Contaminants, Permissible Exposure Limits  GISO, §5155, & Appx A
Cleaning, Repairing, Containers GISO, §5166
Cleanup or removal operations  GISO, §5192
Compliance guidelines  GISO, §5192, Appx C
Levels of protection and protective gear  GISO, §5192, Appx B
Personal protective equipment (PPE) test methods  GISO, §5192, Appx A
References for further information  GISO, §5192, Appx D
Combustible Dust  GISO, §5174
Combustible Metals:
Aluminum, Lithium, Magnesium, Titanium & Zirconium GISO, §5175
Compressed gas, Use to transfer Hazardous Substance, Prohibition GISO, §3301(b)
Compressed gas, Use to transfer Hazardous Substance, Prohibition GISO, §3301(e)
Container & Portable Tank Storage, Flammable & Combustible Liquids
Application / Scope GISO, §5531
Approved Containers & Tanks Required GISO, §5532(a)
Construction & Design of Containers GISO, §5532
Capacity, Maximum Allowable, of Containers GISO, §5533(c), & Table FL-2
Construction & Design of Storage Cabinets GISO, §5533
Capacity, Maximum Allowable, of Storage Cabinets GISO, §5533(c), & Table FL-2
Fire Control for Flammable/ Combustible Liquids Storage GISO, §5543
Storage in inside Storage Rooms GISO, §5535
Storage inside Buildings GISO, §5536
Storage, in Places of Assembly, Hotels & 
Buildings Containing More Than Three Dwelling Units GISO, §5537
Containers 
Flammable Liquids, Gases & Vapors See also FLAMMABLE LIQUIDS, GASES & VAPORS
Combustible Waste GISO, §5551(c)
Contents Labeling, Haz-Com Requirements GISO, §5194(f)
Manifolded Cylinders, Operating procedures GISO, §4845
Reconditioning Closed Containers  GISO, §3307
Self-closing Waste Containers GISO, §5453(g) 
Storage  See Container & Portable Tank Storage, Flammable & Combustible Liquids
Corrosives
Definition GISO, §5194, Appx A
Emergency Eye wash & Shower Equipment See also EYEWASH GISO, §5162(b)
Oil & Gas Refinery, Transportation & Handling, per PSO-R,T&H PSO-R,T&H, §6822 
Hazardous Substances, pursuant to §5194  PSO-R,T&H, §6821
Cotton Dust See under COTTON DUST
Cyanide in Dipping / Open Tanks, Precautions  GISO, §5169
Dichloromethane, Methylene Chloride (MC) See METHYLENE CHLORIDE
Dispensing Devices for Hazardous Substances GISO, §5165
DOT Placarding, Marking, Labeling Requirements    GISO, §5194.1
Drinking water
 Hazard communication program, Proposition 65 Warnings  GISO, §5194(a)(6) 
Drums & Containers, Cleanup or Removal Operations  GISO, §5192
Dust See also DUST, all 
Combustible Dust GISO, §5174
Equipment & Processes, Hazardous Substances GISO, §5167
Emergency Eye wash & Shower Equipment See also EYEWASH GISO, §5162
Emergency response  GISO, §5192
Compliance guidelines  GISO, §5192, Appx C
Levels of protection and protective gear  GISO, §5192, Appx B
Personal protective equipment (PPE) test methods  GISO, §5192, Appx A
References for further Information  GISO, §5192, Appx D
Releases uncontrolled substances  GISO, §5192 
Eye wash & Shower Equipment, Emergency See also EYEWASH GISO, §5162
Grain Handling Facilities See under GRAIN HANDLING FACILITIES
Hazard Communication ( Hazcom) See under HAZARD COMMUNICATION (Hazcom)
Hazardous Waste Operations See under HAZARDOUS WASTE OPERATIONS & Emergency R.
Hazwopper    GISO, §5192(e)
Health Hazard Definitions (Mandatory)  GISO, §5194, Appx A
Labeling Requirements    GISO, §5194(f)
DOT Labeling Requirements    GISO, §5194.1
Laboratory, Exposure to Hazardous Chemicals See under LABORATORY, Exposure to Hazardous Chemicals
Lithium, Combustible Metals  GISO, §5175
Magnesium, Combustible Metals  GISO, §5175
Manufacturers Responsibility, Hazard Communication  See under HAZARD COMMUNICATION
Marine Terminal Operations, Involving Hazardous Substances GISO, §3463
Methylene Chloride  See METHYLENE CHLORIDE
Molten Salt Baths  GISO, §5188
M Tuberculosis protection  GISO, §5147
Nitrate baths  GISO, §5188
Nitrocellulose, Handling, Processing & Storage GISO, §5187
Nitrous Oxide, Piping System for  GISO, §5195
Overflow & Spill Control  GISO, §5163
Pesticides See PESTICIDES
Physical Injurious Liquids (i.e. Burns, Chemical/Thermal GISO, §3302
Plastic, Pyroxylin GISO, §5186
Process Safety Management See under PROCESS SAFETY MANAGEMENT
Processes & Equipment, Hazardous Substances GISO, §5167
Proposition 65 See also HAZARD COMMUNICATION (Hazcom)
Hazard Communication Requirements GISO, §5194(b)(6)
Reference Materials GISO, §5194, Appx E
Protective Equipment
Cleanup or removal operations  GISO, §5192(g)
Compliance guidelines  GISO, §5192, Appx C
Levels of protection and protective gear  GISO, §5192, Appx B
Personal protective equipment (PPE) test methods  GISO, §5192, Appx A
Pyrophoric Substances GISO, §5176
Pyroxylin Plastic GISO, §5186
Respiratory Protective Equipment  See RESPIRATORY PROTECTION, per GISO
Safety Belts, Fall Protection, working over Hazardous Substances  GISO, §3480
Safety & Health Program  GISO, §5192
Salt Baths, Molten Salt Baths  GISO, §5188
Shielding employees, Tubular Gauges  GISO, §5167 
Shower & Eye wash Equipment, Emergency Also EYEWASH GISO, §5162
Signs, Requirements    GISO, §5194(f)
DOT Labeling Requirements    GISO, §5194.1
Spontaneously Combustible Materials GISO, §5177
Spill & Overflow Control  GISO, §5163
Static electricity  GISO, §5168
Combustible dust  GISO, §5174(e)
Storage Batteries, Changing & Charging  See BATTERY CHARGING & CHANGING
Storage of Hazardous Substances GISO, §5164
Sulfur  GISO, §5196
Tanks, Near & Working over
Fall Protection  GISO, §3480
Titanium, Combustible Metals  GISO, §5175
Trade secrets  GISO, §5194(c)
Trade secrets  GISO, §5194(g)
Trade secrets  GISO, §5194(i)
Definitions  GISO, §5194, Appx D
Training Requirements  GISO, §5194(h)
Tuberculosis, M, Protection  GISO, §5147
Vats
Fall Protection  GISO, §3480
Zirconium, Combustible Metals  GISO, §5175
HAZARDOUS WASTE OPERATIONS, & Emergency Response
Application & Scope GISO, §5192(a)(1)
Application & Scope GISO, §5192(a)(2)
Definitions  GISO, §5192(a)(3)
Animals, infected, Aerosol Transmissible Diseases GISO, §5199.1 (d)
Cleanup or removal operations, Compliance guidelines  GISO, §5192, Appx C 
Compliance Guidelines GISO, §5192, Appx C
Containers, Handling GISO, §5192(j)
Decontamination GISO, §5192(k)
Drums, Handling GISO, §5192(j)
Emergency eye wash and shower equipment for employees  Also EYEWASH GISO, §5162
Emergency Response Planning GISO, §5192(l)
Emergency Response to Releases GISO, §5192(q)
Compliance guidelines  GISO, §5192, Appx C
Emergency Response Plan GISO, §5192(q)(1)
Elements, Plan GISO, §5192(q)(2)
Medical Surveillance & Consultation GISO, §5192(q)(9)
Procedure, Emergency Response GISO, §5192(q)(3)
Skilled Support Personnel GISO, §5192(q)(4)
Specialist Employees GISO, §5192(q)(5)
Training of Responders GISO, §5192(q)(6)
Refresher Training GISO, §5192(q)(8)
Trainers GISO, §5192(q)(7)
Engineering Control GISO, §5192(g)
Exposure hazard communication program  GISO, §5194
Eye wash and shower equipment for employees  Also EYEWASH GISO, §5162
Flammable and combustible liquids
Bulk storage plants
    Electrical Installations & Equipment  ESO-LV, §2540.8
per CSO  CSO, §1930
Dispensing liquids  CSO, §1934
Fire control devices  CSO, §1933
Inside storage  CSO, §1931
Outside storage  CSO, §1932
Refueling areas  CSO, §1936
Service areas  CSO, §1936
Use of Flammable Liquids CSO, §1935
Food handling GISO, §5192(n)(4)
Handling Drums and Containers  GISO, §5192(j)
Hazwopper, Training GISO, §5192(e)
Informational Program GISO, §5192(i)
Lighting / Illumination GISO, §5192(m)
Medical Surveillance GISO, §5192(f)
Monitoring GISO, §5192(h)
New Technology Programs  GISO, §5192(o)
Non-potable water  GISO, §5192(n)(2) 
Personal Protective Equipment GISO, §5192(g) 
Level of Protection GISO, §5192, Appx B
Test Methods GISO, §5192, Appx A
Potable water  GISO, §5192(n)(1)
RCRA Operations GISO, §5192(p)
Resource Conservation and Recovery Act Operations  GISO, §5192(p) 
Safety & Health Program GISO, §5192(b)
Sanitation at Temporary Workplaces GISO, §5192(n)
Showers and change rooms   GISO, §5192(n)(7)
Site Characterization & Analysis GISO, §5192(c)
Site Control GISO, §5192(d)
Sleeping Quarters, Temporary   GISO, §5192(n)(5)
Technology Programs, New GISO, §5192(o)
Temporary sleeping quarters   GISO, §5192(n)(5)
Toilet Facilities  GISO, §5192(n)(3)
Training, Hazwopper GISO, §5192(e)
Washing facilities   GISO, §5192(n)(6)
Water, Drinking GISO, §5192(n)(1), (2)
Work Practices GISO, §5192(g)
Compliance Guidelines GISO, §5192, Appx C
References GISO, §5192, Appx D 
HAZCOM See HAZARD COMMUNICATION (Hazcom)
HAZWOPER TRAINING   GISO, §5192(e)
HBV, Hepatitis B Virus See BLOODBORNE PATHOGENS
HCV, Hepatitis C Virus See BLOODBORNE PATHOGENS
HEADER, Gas Welding Hose & Connections     CSO, §1742(e)
Definition of CSO, §1742(e)
HEADROOM CLEARANCE
Elevated Working Levels, Platforms, Ramps & Runways  GISO, §3273(c)
Catwalks GISO, §3273(d)
Impaired Clearances, Posted, Guarding GISO, §3273(m)
Inclined  GISO, §3273(d)
Oil Well Pumping Machinery / Equipment PSO-D&P, §6633(b)
HEAD PROTECTION, per GISO GISO, §3381
From Flying or Falling Objects and/or Electric Shock GISO, §3381(a)
From Hair Entanglement GISO, §3381(e)
Required Markings on Approved Helmets GISO, §3381(d)
Selection and Use GISO, §3381(c)
HEAD PROTECTION, Logging Operations LSSO, §6255
HEAD PROTECTION, Mining Operations MSO, §6980(b)
HEAD PROTECTION, Sawmill Operations LSSO, §6255
HEAD PROTECTION, Tunneling Operations TSO, §8414(b)
HEADER, Gas Welding Hose & Connections, Construction Operations CSO, §1742
Definition of CSO, §1742(e)
HEADING OPERATIONS, Safe Practices & Operations Code TSO, §8568, Appx A, 13-23
HEADROOM REQUIREMENTS
Catwalks GISO, §3273(d)
Conveyors, Screw   GISO, §3999(a)
Crossovers, Conveyors   GISO, §3999(c)
Elevated Working Levels, Platforms, Ramps & Runways  GISO, §3273(c)
Exits GISO, §3224
HEALTH CARE WORKER BACK & MUSCULOSKELETAL INJURY PREVENTION GISO, §5120
HEARING PROTECTION, Control of Noise Exposure, per GISO 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
Audiometric Measuring Instruments GISO, §5100, Appx B
Audiometric Testing Program GISO, §5097(c)
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 Test Rooms GISO, §5100, Appx C
Definitions  GISO, §5095
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)
HEARING PROTECTION, per CSO CSO, §1521
HEARING PROTECTION, per TSO TSO, §8414(e)
Hearing Protector Attenuation  TSO, §8414(f)
HEARING TESTS, AUDIOMETRIC TEST PROGRAM GISO, §5097(c)
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)
HEAT ILLNESS PREVENTION, Outdoor GISO, §3395
Access to Drinking Water GISO, §3395(c)
Maintenance of GISO, §3457(c)(3)
Access to Shade GISO, §3395(d)
>85°,  Shade Requirements GISO, §3395(d)(1)
≤85°,  Shade Requirements GISO, §3395(d)(2)
Agricultural Industry, Subject to Standard GISO, §3395(a)(2)(A)
Application & Scope GISO, §3395(a)(2)
Construction Industry, Subject to Standard GISO, §3395(a)(2)(B)
Cool-down Rest Period, Permitted at all Times GISO, §3395(d)(3)
Definitions GISO, §3395(b)
Drinking Water, Access to GISO, §3395(c)
Maintenance of GISO, §3457(c)(3)
High-Heat Procedure GISO, §3395(e)
Landscaping Industry, Subject to Standard GISO, §3395(a)(2)(C)
Landscaping Defined GISO, §3395(b)
Oil & Gas Extraction Industry, Subject to Standard GISO, §3395(a)(2)(D)
Rest Period, Cool-down, Permitted at all Times GISO, §3395(d)(3)
Temperature Triggers
>85°,  Shade Requirements GISO, §3395(d)(1)
≤85°,  Shade Requirements GISO, §3395(d)(2)
95°,  High-Heat Procedure GISO, §3395(e)
Training GISO, §3395(f)
Transportation of Agri-Products, Construction & other Heavy Materials, Subject to Standard GISO, §3395(a)(2)(E)
Exception, Operators in Air-conditioned Vehicles GISO, §3395(a)(2)(E)
HEAT LAMP, Infrared Lamp, Industrial Heating Appliances ESO-LV, §2522.15
HEATERS, LP-Gas Fired Space Heaters      CSO, §1706
HEATERS, Temporary CSO, §1693
Clearances CSO, §1693(c)
Fire Protection CSO, §1693(g)
Oil-Fired Heaters CSO, §1693(f)
Solid Fuel Salamanders CSO, §1693(e)
Ventilation CSO, §1693(b)
Space heaters See APPLIANCES
HEATERS, Fixed Electric Space Heating Equipment  ESO-LV, Article 53 
Application / Scope  ESO-LV, §2524.1
Disconnecting Means  ESO-LV, §2524.19
Immersion Type, Portable ESO-LV, §2522.9
Location of ESO-LV, §2524.65
Space heaters See APPLIANCES
HEATING, Coated Metals CSO, §1537 
HEATING & AGITATION OF LIQUIDS IN TANKS
Work sites Subject to PSO-D&P PSO-D&P, §6544
Work sites Subject to PSO-R,T&H  PSO-R,T&H, §6833
HEATING & AIR CONDITIONING
General Requirements GISO, §5143
Inspections & Maintenance GISO, §5142(b)
Record keeping requirements GISO, §5142(b)(2)
Record keeping requirements GISO, §5142(b)(3)
Operated during work hours GISO, §5142(a)
HEATING DEVICES 
LP-gas fired space heaters CSO, §1706
HEATING DEVICES, Fire Prevention per MSO MSO, §7061
HEATING EQUIPMENT, Electric, for Pipeline Vessels ESO-LV, Article 55
Application / Scope  ESO-LV, §2527.1
Definitions ESO-LV, §2527.2
Disconnecting Means ESO-LV, §2527.55
General Installation Requirements ESO-LV, §2527.10
Identification / Nameplate  ESO-LV, §2527.13
Over-current  Protection  ESO-LV, §2527.22 
Space heaters See APPLIANCES
Use  ESO-LV, §2527.11
HEATING EQUIPMENT, Induction & Dielectric ESO-LV, Article 77.2
Application / Scope ESO-LV, §2567.1
Guarding & Grounding ESO-LV, §2567.2
Remote Controls ESO-LV, §2567.3
HEATING EQUIPMENT, Explosives magazines/ Storage buildings, for  GISO, §5254
HEATING, Protection against Induction Heating  ESO-HV, §2749
HEAT STROKE See HEAT ILLNESS PREVENTION 
HEAVY EQUIPMENT See under EARTHMOVING EQUIPMENT 
                                  See under HAULAGE EQUIPMENT
HEDGE CLIPPERS, Electrical, Grounding ESO-LV, §2395.45(A)
HEEL COMPRESSING MACHINE GISO, §4512
HELICOPTER OPERATIONS  CSO, Article 35
Construction Operations per CSO
Application / Scope CSO, §1900
Automatic release devices  CSO, §1908(e)
Blasting operations notice to pilot  CSO, §1906
Cargo Loading & Handling CSO, §1908
Code of Safe Practices  CSO, §1938, Appx C, Plate C-36-a
    Transporting  CSO, §1908
Communications        CSO, §1906
Radio Communication Requirement       CSO, §1908(f)
Daily briefing  CSO, §1901(c)
Explosives
Transporting  CSO, §1908(c)
Notification of Blasting Activities CSO, §1906(a)
Exposed Locations CSO, §1909 
Elevated Surface, Exposed to  CSO, §1909
Illustrations CSO, §1938, Appx B, Plate C-36-b
Steep Slopes, Exposed to  CSO, §1909
Tower Type Structure, Top of, Exposed to  CSO, §1909(b)
Fall Exposure  CSO, §1909 
Fueling      CSO, §1905
Bonding CSO, §1905(b)
General Requirements      CSO, §1901
Ground Crew CSO, §1907
Exposed locations, protection from falls  CSO, §1909 
Hand signals  CSO, §1906(c)
Hazards notice to pilot  CSO, §1906
Landing Operations      CSO, §1903
Pilot certification  CSO, §1901(e)
Release Devices
Automatic release devices  CSO, §1908(e)
Quick release devices  CSO, §1908(d)
Radio Communication Requirement       CSO, §1908(f)
Safe practices code  CSO, §1938, Appx C, Plate C-36-a
Signal systems  CSO, §1906
Sling load CSO, §1908(d)
    Transporting Persons, Prohibitions CSO, §1908
Static Electricity      CSO, §1904
Survey, Job site  CSO, §1901(a)
Transportation of employees and materials  GISO, §3710
Energized Electrical Power Lines, Working above ESO-HV, §2946
Logging Operations per LSSO LSSO, Article 11 
Communication & Signal System LSSO, §6326
Fueling & Fueling Area LSSO, §6325
Bonding Requirement while fueling LSSO, §6325(e)
General Requirements LSSO, §6320 
Ground Personnel LSSO, §6324
Hooking & Unhooking Loads LSSO, §6322
Landings LSSO, §6323
Personal Protective Equipment LSSO, §6327
Pilot Certification  LSSO, §6320 
Rigging LSSO, §6321
Safe Practices LSSO, §6402, Appx A
Signals, Hand LSSO, §6402, Appx A
Transportation of employees and materials  GISO, §3710
Helicopter, Tunneling Operations, Emergency Medical Service TSO, §8420(b) 
HELIUM, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HELPER PROTECTION & GUARDING, Die Casting GISO, §4263
HEPA FILTERS
                   See also specific Material, Procedure, Operation
Biological Safety Cabinets GISO, §5154.2
Testing Protocol  GISO, §5155, Appx A
HEPATITIS B VIRUS (HBV) See BLOODBORNE PATHOGENS
HEPATITIS C VIRUS (HCV) See BLOODBORNE PATHOGENS
HEPTACHLOR, Airborne Contaminant, Exposure limit  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEPTANE, Airborne Contaminant, Exposure limit  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HERBICIDES See PESTICIDES 
HEXACHLOROBENZENE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEXACHLOROBUTADIENE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEXACHLOROCYCLOHEXANE, 1,2,3,4,5,6-, (Lindane)
Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEXACHLOROCYCLOPENTADIENE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEXACHLOROETHANE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEXACHLORONAPHTHALENE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEXAFLUOROACETONE
Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process Safety Management GISO, §5189, Appx A
HEXAMETHYLENE DIISOCYANATE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEXANE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEXANEDIAMINE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEXYL ACETATE, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HEXYLENE GLYCOL, Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HIDES, Hair Removal from, Leather Goods Machine GISO, §4519
HIGHLEAD, Illustration LSSO, §6402, Appx A
HIGHLEAD LOGGING, Plan View, Illustration LSSO, §6402, Appx A
HIGH LIFT TRUCKS, Use in Structural Wood Construction     CSO, §1716.1(d)
Roofing Operations CSO, §1724(g)
HIGH PILES, Safe Access to GISO, §3339(b)
HIGH VISIBILITY SAFETY APPAREL
Excavations, Employees exposed to Vehicle Traffic CSO, §1541(d)
Flaggers CSO, §1599(d), (e), (f)
Private and Off-Highway Conditions per §1598 and §1599  CSO, §1590(a)(5)
Traffic Control   CSO, §1598(c), (d), (e) 
Employees exposed to Vehicle Traffic CSO, §1590(a)(5)
HIGH-VOLTAGE ELECTRICAL SAFETY ORDERS (ESO-HV) ESO-HV, Group 2
                              See all specific entries identified with “ESO-HV” before Section numbers
                              See also under ELECTRICAL
Application ESO-HV, §2706
Scope ESO-HV, §2705
Approvals by Cal/OSHA ESO-HV, §2707
Definitions ESO-HV, §2700
Special Requirements have precedence over General Requirements ESO-HV, §2703
Titles & Subtitles ESO-HV, §2704
Variances from These Orders  ESO-HV, §2709
HIGH VOLTAGE LINE CLEARANCE, Tree Trimming ESO-HV, Article 38
Application ESO-HV, §2950
Minimum Approach Distances ESO-HV, §2950(b), Table 1 
Line Clearance Operations  ESO-HV, §2951
HIGH VOLTAGE LINES, Working Near   ESO-HV, Article 37
General Provisions for ESO-HV, §2946
Notification to the Operators of High-Voltage Lines ESO-HV, §2948
Responsibility for Safeguards  ESO-HV, §2948
Special Exemption ESO-HV, §2949
Warning Signs Requirement ESO-HV, §2947
HIGH VOLTAGE LINES, per TelSO
Approach Distances to TelSO, §8602(h)
Poles, Handling of Poles near TelSO, §8615(i)
Hoisting Poles Near TelSO, §8611(a)
HIGHWAY MARKING, Traffic Control     CSO, §1598
HIGHWAYS AND ROADS
Bridges See BRIDGES
Construction
Flaggers  CSO, §1599
Employees exposed to Vehicle Traffic at Excavations CSO, §1541(d)
High Visibility Safety Apparel, Flaggers, warning garments CSO, §1599(d)
High Visibility Safety Apparel, Flaggers, during hours of darkness CSO, §1599(e)
High Visibility Safety Apparel, Flaggers, proper type CSO, §1599(f) 
Number of Flaggers CSO, §1599(a)
Traffic Control & Barricades, Public Streets & Highways  CSO, §1598
Private roadways haulage  CSO, §1590 
Traffic control  CSO, §1598
Culverts, Operating Internal Combustion Engines Inside  CSO, §1533(a)
Confined Space Requirements CSO, §1533(c)
Ventilation Requirements CSO, §1533(b)
Ventilation Systems, General Requirements CSO, §1530
Earth moving
Private roadways  CSO, §1590
Employees exposed to Vehicle Traffic at Excavations CSO, §1541(d)
Equipment Control CSO, §1590(c)
Explosives Used for See EXPLOSIVES
Logging roads
Bridge Construction & Maintenance LSSO, §6266
Construction of Roads  LSSO, §6265
Lighting  LSSO, §6267
Maintenance of  LSSO, §6265
Illumination during Nighttime Work LSSO, §6267
Road Construction & Maintenance LSSO, §6265
Mining roads private  MSO, §7014
Motor vehicles See MOTOR VEHICLES
Pipelines, Operating Internal Combustion Engines Inside  CSO, §1533(a)
Confined Space Requirements CSO, §1533(c)
Ventilation Requirements CSO, §1533(b)
Ventilation Systems, General Requirements CSO, §1530
Private mining roads
Construction and maintenance  MSO, §7014
Private roadways earth moving per CSO CSO, §1590
Private roadways earth moving per TSO TSO, §8484
Traffic control    CSO, §1598
Flaggers CSO, §1599
High Visibility Safety Apparel, Flaggers, warning garments CSO, §1599(d)
High Visibility Safety Apparel, Flaggers, during hours of darkness CSO, §1599(e)
High Visibility Safety Apparel, Flaggers, proper type CSO, §1599(f) 
Number of Flaggers CSO, §1599(a)
High Visibility Safety Apparel, Traffic Control   CSO, §1598(c)
High Visibility Safety Apparel, Traffic Control   CSO, §1598(d), (e), (f)
Vehicular traffic, Exposure to CSO, §1541(d)
private roads  TSO, §8484
HIGH WIND CONDITIONS, Work Stoppage TelSO, §8602(i)
HISTOTOMES See MICROTOMES
HITCHES & KNOTS, Illustrations CSO, §1938, Appx B, Plate B-25a
HIV See BLOODBORNE PATHOGENS
HOG MILLS, Woodworking Machines GISO, §4298
HOISTING EQUIPMENT & Cranes, per LSSO
Boom-type Machines LSSO, §6315(e)
Mobile Yarders & Loaders LSSO, §6304
HOISTING EQUIPMENT, & Cranes, per MSO MSO, §6982(g)
Cable attachment method  MSO, §7138
Cranes, per GISO MSO, §6982(g)
Design of Headframes MSO, §7128
Employee raising or lowering, Restrictions  MSO, §6982
Enlarging a Shaft  MSO, §7116
Exit, Shafts with One Exit   MSO, §7124
First-Class Hoists MSO, §7126
Use to Hoist Personnel Permitted  MSO, §7125
Hoist for Hoisting Personnel  MSO, §7125
Hoist Operator, Hoistman
Qualifications  MSO, §7150
Required to be on duty  MSO, §7149
Hoist Signal System  MSO, §7139
Dual Signaling System MSO, §7140
Hoisting Cables
Method of Attaching to Conveyance MSO, §7138
Safety Hook MSO, §7138(a)
Hoisting Equipment & Cranes, per GISO MSO, §6982(g)
Hoisting Equipment for Materials  MSO, §7120
Power-Driven Material Hoist MSO, §7121
Hoisting Practices MSO, Article 37
Hoisting Personnel, General MSO, §7147
Hoisting Tools & Materials MSO, §7148
Hoistmen Required on Duty MSO, §7149
Loading Personnel on Conveyance MSO, §7146
Qualified Hoistmen  MSO, §7150
Hoisting Ropes
Maintenance of Hoisting Rope MSO, §7136
Method of Attaching to Conveyance MSO, §7137
Safety Factor & Inspections MSO, §7135
Hoisting Signal Code MSO, §7141
Hoists MSO, §7123
Hoists at Shafts with One Exit MSO, §7124
Inspection, Equipment subject to wear  MSO, §7011
Lubricating Sheaves, Rollers & Hoisting Equipment MSO, §7143
Material hoists  MSO, §7120
Power-driven hoists  MSO, §7121
Operating controls  MSO, §7123
Parts Subject to Wear  MSO, §7011
Personnel Conveyances in Inclined Shaft MSO, §7133
Personnel Conveyances in Vertical Shaft  MSO, §7132
Personnel Hoisting MSO, §7125
Personnel Hoist, Class I, Specification MSO, §7126
Riding Loads, Employee raising or lowering, Restrictions  MSO, §6982(h)
Ropes
  Conveyance attachment method  MSO, §7137
Maintenance  MSO, §7136
Safety factor and inspections  MSO, §7135
Safe Practices  MSO, §7147
Shaft Conveyances, General MSO, §7129
Shaft Tracks MSO, §7131
Shaft conveyances  MSO, §7129
Shaft Guides MSO, §7130
Inclined shafts  MSO, §7133
Loading workers  MSO, §7146
Shaft Tracks MSO, §7131
Vertical shafts  MSO, §7132
Worker Transport  MSO, §7147
Signals, Hoisting   MSO, §7139
Code, Hoisting Signal MSO, §7141
Dual signaling systems  MSO, §7140
Station Signal Board  MSO, §7142
Sinking a Shafts  MSO, §7116
Station Signal Boards MSO, §7142
Tools and materials  MSO, §7148
Whims & Windlasses MSO, §7122
HOISTING EQUIPMENT, per TelSO TelSO, §8611
Clearances to High-Voltage Conductors / Equipment TelSO, §8611(a)
Handling Poles Near High-Voltage TelSO, §8611(a)
Handling Poles Near High-Voltage TelSO, §8611(a), (b)
HOISTING OPERATIONS, per TSO
Engineers TSO, §8499
Equipment & Systems TSO, §8495
Hoisting Systems Inspections TSO, §8495
Inspections  TSO, §8501
Medical examination form TSO, §8568, Appx C
Operations  TSO, §8500
Shafts under construction  TSO, §8494
Signals  TSO, §8498
Vertical access shafts  TSO, §8493
Wire rope and sheaves  TSO, §8497 
HOISTS, Auxiliary Equipment & Operations
General Requirements See under CRANES & Other Hoisting Equipment, General
Brakes  GISO, §4971
Bulk cargo handling devices, Examination  GISO, §5024
Testing, Exempt  GISO, §5024
Capacity Marking  GISO, §4973
Chains, Hoisting Chains & Ropes GISO, §4980
End attachment  GISO, §4981
Control Equipments GISO, §4975
Definitions  GISO, §4885 
Electrical Requirements per ESO See HOISTS, Electrical Requirements per ESO
End Attachments GISO, §4981
Explosives, Hoisting, Transportation of GISO, §5265
Fire Extinguisher Requirement GISO, §4997
Hoist Trolley Frames GISO, §4972
Hoisting Chains GISO, §4980
Hoisting Equipment    GISO, §4884(c)
Hoisting Operations GISO, §4985
Hoisting Ropes GISO, §4980
Inspection Requirements GISO, §5031 
Annual GISO, §5021
After Storage Period   GISO, §5031(e)
Certification GISO, §5031(c)
Certification GISO, §5031(d)
Daily GISO, §5031(b)
Damaged Booms GISO, §5035
Every 4 years, Proof Load Testing GISO, §5022
Periodic, Minimum 4x per Year GISO, §5031(c)
Record keeping  GISO, §5031(c)(4)
Reports  GISO, §5031(c)(4)
Storage, After 1 Mount or More   GISO, §5031(e)
Written Inspection Log  GISO, §5031(d)(3)
Limit Device GISO, §4970
Load Handling GISO, §4999
Overhead Loads GISO, §5002
Rigging by Qualified Person (Rigger) GISO, §4999(a)
Marine terminal operations 
Hoisting Equipment GISO, §3472
Certification of Hoisting Equipment GISO, §3473
Hooks, Slings, Bridles & Fittings GISO, §3474
Mobile Towers, Hoists & Similar Equipment GISO, §4986
Operating Rules GISO, Article 98
Applications / Scope  GISO, §4990
Booms  GISO, §4992
Bulk storage, Manual Personnel Hoist  GISO, §3482(c)
Crane or Derrick Suspended Personnel Platform GISO, §5004(d)
Driver Position, during loading GISO, §4996
Fire Extinguisher GISO, §4997
Floor-Operated Cranes GISO, §5009
Handling Loads GISO, §4999
High Voltage Lines, Accident Prevention GISO, §5003
Hoisting  GISO, §4994
Limit Switches, testing GISO, §5000
Operator Certification, Mobile & Tower Cranes GISO, §5006.1   
Operator Qualifications GISO, §5006
Operating Practices GISO, §5008
Outriggers, use of See Outriggers, this Heading
Overhead Loads  GISO, §5002
Refueling GISO, §4998
Riding loads Prohibited GISO, §4995
Rigging by Qualified Person (Rigger) GISO, §4999(a)
Side-boom Cranes, Subject to CSO  CSO, §1694
Signal Requirements GISO, §5001
Hand Signals, Cranes GISO, §5001, Plate I 
Hand Signals, Boom Equipments GISO, §5001, Plate I
Swing (Rotation)  GISO, §4993
Suspended Personnel Platform, Crane or Derrick GISO, §5004(d)
Travel  GISO, §4991
Accident Avoidance, During Travel GISO, §4991(a)
Empty Hook, Block, Restraining / Securing During Travel GISO, §4991(b)
Operator Qualifications GISO, §5006
Overhead Loads GISO, §5002
Overhead high-voltage lines prevention of accidents  GISO, §5003
Refueling engines  GISO, §4998
Riding on  GISO, §4995
Rigging by Qualified Person (Rigger) GISO, §4999(a)
Ropes, Hoisting  GISO, §4980
End attachment  GISO, §4981
Sheave Nip-Points GISO, §4984
Sheaves  GISO, §4977
Nip-points  GISO, §4984
Slings GISO, Article 101
Application & Scope  GISO, §5040
Definitions  GISO, §5041
Illustrations
Quadruple Sling, links and chains GISO, §5049, Figure S-1
Quadruple Sling, handles GISO, §5049, Figure S-2
Quadruple Sling, Metal Mesh Sling GISO, §5049, Figure S-3
Basic Sling Configurations GISO, §5049, Figure S-4
Sling Configurations with Angled Legs GISO, §5049, Figure S-5
Basic Synthetic Web Sling Configuration GISO, §5049, Figure S-6
Alloy Steel Chain Slings GISO, §5044
Identifications / Markings GISO, §5044(a)
Heated / Heating of GISO, §5044(f)
Defective Hooks & Rings  GISO, §5049 
Fiber Rope Slings, Synthetic & Natural GISO, §5047
Inspections  GISO, §5043
Metal Mesh Slings GISO, §5046
Natural fiber rope slings  GISO, §5047
Identifications / Markings GISO, §5047(g)
Quadruple Slings, Illustration  GISO, §5049, Figure S-1
Rated Capacities
Alloy steel chain slings GISO, §5049, Table S-1
Wrought iron chain GISO, §5049, Table S-2
Single leg slings, plow steel grade rope w/fiber core GISO, §5049, Table S-3
Single leg slings, plow steel grade rope w/independent wire rope core GISO, §5049, Table S-4
Single leg slings, cable laid rope, mechanical splice only GISO, §5049, Table S-5
Single leg slings, braided rope GISO, §5049, Table S-6
2-leg and 3-leg bridle slings, plow steel grade rope w/fiber core GISO, §5049, Table S-7
2-leg and 3-leg bridle slings, plow steel grade rope w/wire rope core GISO, §5049, Table S-8
2-leg and 3-leg bridle slings, cable laid rope, mechanical splice only GISO, §5049, Table S-9
2-leg and 3-leg bridle slings, braided rope GISO, §5049, Table S-10
Strand laid grommet, hand tucked GISO, §5049, Table S-11
Cable laid grommet hand tucked GISO, §5049, Table S-12
Strand laid endless slings, mechanical joint GISO, §5049, Table S-13
Cable laid endless slings, mechanical joint GISO, §5049, Table S-14
Cable type classifications and designations GISO, §5049, Table S-15
Fabric construction GISO, §5049, Table S-16
Carbon steel and stainless steel metal mesh slings GISO, §5049, Table S-17
Manila rope slings GISO, §5049, Table S-18
Nylon rope slings GISO, §5049, Table S-19
Polyester rope slings GISO, §5049, Table S-20
Polypropylene rope slings GISO, §5049, Table S-21
Synthetic web slings, 1,000 lbs. per inch of width GISO, §5049, Table S-22
Synthetic web slings, 1,200 lbs. per inch of width GISO, §5049, Table S-23
Synthetic web slings, 1,600 lbs. per inch of width GISO, §5049, Table S-24
Rings, Defective  GISO, §5049
Safe Operating Practices GISO, §5042
Shackles GISO, §5049(g)
Identifications / Markings GISO, §5049(g)(1), (2), (3)
Loading, Not in Excess of Recommended Safe Working Load GISO, §5049(g)(2)
Safe Working Loads GISO, §5049, Table S-25
Ship building, Repair, & Breaking Operations
Compliant with GISO, Articles 96 &101  SSO, §8379(a)
Use of Slings & Pendants SSO, §8379
Handling materials  SSO, §8381
Materials Requirements  SSO, §8380
Pendent Requirements, Two Required  SSO, §8380
Securing and fastening materials  SSO, §8383
Synthetic Web Slings GISO, §5048
Identifications / Markings GISO, §5048(a)
Wire Rope Slings GISO, §5045
Identifications / Markings GISO, §5045(g)
Stops  GISO, §4974
Testing  GISO, Article 99
Accessory Gear GISO, §5022
Brakes GISO, §4994(c)
Bulk Cargo Handling Devises GISO, §5024
Certificates GISO, §5025
Certificate of Testing GISO, §4885 Plate V
Initial Use or After Repair, When Testing is Required  GISO, §5020
Equipment over Three Tons Rated Capacity GISO, §5021
Examination of Bulk Cargo Handling Devices GISO, §5024
Operational Testing GISO, §5020
Over 3 tons rated capacity GISO, §5021  
Proof Load Testing & Examination
Cranes & Accessory Gear GISO, §5022
Derricks & Accessory Gear GISO, §5023
Safe Working Loads Determination GISO, §5026
Safe Working Loads Increase GISO, §5028
Safe Working Loads Reduction GISO, §5027
Test Weights GISO, §5022.1
Tramways  GISO, §4987
Trolley frames  GISO, §4972
Warning Device GISO, §4976
HOISTS, Construction Material See CONSTRUCTION MATERIAL HOIST
HOISTS, Electrical Requirements per ESO ESO-LV, Article 74
Access to Control Cabinets, Space Clearance ESO-LV, §2561.3
Application / Scope ESO-LV, §2561.1
Combustible Materials, Work over  ESO-LV, §2561.2
Disconnecting Means
Cranes & Hoists ESO-LV, §2561.32
Runway Conductor  ESO-LV, §2561.31
Energized Parts, Access ESO-LV, §2561.3
Limit Switch Requirement ESO-LV, §2561.55
Location Requirement ESO-LV, §2561.2
Magnets, Lifting ESO-LV, §2561.7
Motor, Separate Controls for Each  ESO-LV, §2561.51
Remote Control Circuits ESO-LV, §2561.8
Wiring Method, Enclosures / Raceways ESO-LV, §2561.11
Work Space Clearance ESO-LV, §2561.3
HOISTS, Equipment, & Practices, per MSO  MSO, Article 36
Cable attachment method  MSO, §7138
Design of Headframes MSO, §7128
Employee raising or lowering, Restrictions  MSO, §6982
Enlarging a Shaft  MSO, §7116
Exit, Shafts with One Exit   MSO, §7124
First-Class Hoists MSO, §7126
Use to Hoist Personnel Permitted  MSO, §7125
Hoist for Hoisting Personnel  MSO, §7125
Hoist Operator, Hoistman
Qualifications  MSO, §7150
Required to be on duty  MSO, §7149
Hoist Signal System  MSO, §7139
Dual Signaling System MSO, §7140
Hoisting Cables
Method of Attaching to Conveyance MSO, §7138
Safety Hook MSO, §7138(a)
Hoisting Equipment for Materials  MSO, §7120
Power-Driven Material Hoist MSO, §7121
Hoisting Practices MSO, Article 37
Hoisting Personnel, General MSO, §7147
Hoisting Tools & Materials MSO, §7148
Hoistmen Required on Duty MSO, §7149
Loading Personnel on Conveyance MSO, §7146
Qualified Hoistmen  MSO, §7150
Hoisting Ropes
Maintenance of Hoisting Rope MSO, §7136
Method of Attaching to Conveyance MSO, §7137
Safety Factor & Inspections MSO, §7135
Hoisting Signal Code MSO, §7141
Hoists MSO, §7123
Hoists at Shafts with One Exit MSO, §7124
Inspection, Equipment subject to wear  MSO, §7011
Lubricating Sheaves, Rollers & Hoisting Equipment MSO, §7143
Material hoists  MSO, §7120
Power-driven hoists  MSO, §7121
Operating controls  MSO, §7123
Parts Subject to Wear  MSO, §7011
Personnel Conveyances in Inclined Shaft MSO, §7133
Personnel Conveyances in Vertical Shaft  MSO, §7132
Personnel Hoisting MSO, §7125
Personnel Hoist, Class I, Specification MSO, §7126
Riding Loads, Employee raising or lowering, Restrictions  MSO, §6982(h)
Ropes
  Conveyance attachment method  MSO, §7137
Maintenance  MSO, §7136
Safety factor and inspections  MSO, §7135
Safe Practices  MSO, §7147
Shaft Conveyances, General MSO, §7129
Shaft Tracks MSO, §7131
Shaft conveyances  MSO, §7129
Shaft Guides MSO, §7130
Inclined shafts  MSO, §7133
Loading workers  MSO, §7146
Shaft Tracks MSO, §7131
Vertical shafts  MSO, §7132
Worker Transport  MSO, §7147
Signals, Hoisting   MSO, §7139
Code, Hoisting Signal MSO, §7141
Dual signaling systems  MSO, §7140
Station Signal Board  MSO, §7142
Sinking a Shafts  MSO, §7116
Station Signal Boards MSO, §7142
Tools and materials  MSO, §7148
Whims & Windlasses MSO, §7122
HOISTS, Oil & Gas Production & Development, per PSO-D&P 
Hand Line  PSO-D&P, §6655(b)
Hoisting Employees, Prohibition PSO-D&P, §6655(c)
Exception to Prohibition to Hoist Employees PSO-D&P, §6655(c)
Weight indicators  PSO-D&P, §6690
Wire rope lines  PSO-D&P, §6640
Reeving of Hoisting Line  PSO-D&P, §6655(a)
HOISTS, Personnel, Construction Hoist, per CSO
ANSI 10.4-1973 CSO, §1604 
                       CSO, §1604.30
Application / Scope CSO, §1604.1(a)
Prohibitions CSO, §1604.1(a)(3)
Prohibitions CSO, §1604.1(a)(4)
Related Standards CSO, §1604.2
Building Trigger Height   CSO, §1630(a)
Belt-type man-lifts, Endless, Prohibited  CSO, §1604.1(a)(3)
Brakes, Drive Machine CSO, §1604.22(g)
Brakes, Driving Machines CSO, §1604.24(g)
Buffers, Car & Counterweight CSO, §1604.14
Spring Buffers  CSO, §1604.4
Capacity & Loading  CSO, §1604.21
Car & Counterweight
Car & Counterweight Buffers  CSO, §1604.14 
Car Doors, Gates & Electrical Contacts CSO, §1604.18
Car Enclosures  CSO, §1604.17
Car Frames & Platforms  CSO, §1604.16
Car Safeties  CSO, §1604.19
Clearances, Horizontal CSO, §1604.11
Clearances & Run-bys CSO, §1604.10
Counterbalancing on another, Prohibited  CSO, §1604.15
Counterweight Requirements CSO, §1604.15
Guarding of Counterweight CSO, §1604.12
Guide Members, Supports, Fastenings CSO, §1604.13
Guides CSO, §1604.13
Location of Counterweight CSO, §1604.12
  Sectional counterweights  CSO, §1604.15
Clearances
Bottom and top  CSO, §1604.10
    Car counterweight and counterweight screen; between  CSO, §1604.15
Horizontal    CSO, §1604.11
Compartments  CSO, §1604.17
Construction of Personnel Hoist  CSO, §1604.5
Controls & Operating Devices CSO, §1604.24
Control Equipment, Access to  CSO, §1604.9
Counterbalancing Cars, Prohibition  CSO, §1604.15
Counterweights 
Buffers  CSO, §1604.14
Clearance to Cab & Hoistway CSO, §1604.15(a) 
Clearances, Horizontal CSO, §1604.11
Clearances & Run-bys CSO, §1604.10
Design Requirements CSO, §1604.15(b)
Guarding of Counterweight CSO, §1604.12
Guide Members, Supports, Fastenings CSO, §1604.13
Location of Counterweight CSO, §1604.12
Ropes  CSO, §1604.25
Rope Connections CSO, §1604.25(a), (i)
Rope Inspections CSO, §1604.25(j)
Design  CSO, §1604.15
Disabling Safety Devices, Prohibition CSO, §1604.19(b)
Disconnecting means  CSO, §1604.24
Dismantling of Hoist  CSO, §1604.5(e)
Door locking devices  CSO, §1604.6
Driving Machines, Sheaves, & Drums CSO, §1604.22
Drums, Driving Machines, & Sheaves CSO, §1604.22
Electrical Wiring, Fittings, Fixtures  CSO, §1604.8
Elevators, used as Construction Personnel Hoist   CSO, §1604.4
Emergency Stop Switch  CSO, §1604.24(b)(4)
Engineering supervision  CSO, §1604.1(c)
Erection of Hoist  CSO, §1604.5(e)
Factor of Safety CSO, §1604.22(i)
Flooring Over Hoistway CSO, §1604.7
Foundations CSO, §1604.7
Supported by CSO, §1604.5(d)
Lubrication  CSO, §1604.27(a)
Governors  CSO, §1604.20
Guys, Wire Rope CSO, §1604.5(d)(2)  
Safeties  CSO, §1604.19
Hoisting Ropes,  CSO, §1604.25
Rope Connections CSO, §1604.5  
Hoistway Doors & Door Locks  CSO, §1604.6
Hoistway enclosures CSO, §1604.5
Inspection & Tests  CSO, §1604.26
Inspections  CSO, §1604.26
Fees  CSO, §1604.29(b)
Ropes  CSO, §1604.25
Lighting of Machinery & Control Spaces CSO, §1604.9
Machinery & Control Equipment
Access to  CSO, §1604.9(a)
Lighting of  CSO, §1604.9(c)
Unauthorized Person, Protection from  CSO, §1604.9(b)
Weather, Protection from  CSO, §1604.9(b)
Maintenance  CSO, §1604.27
Man-lifts, Endless Belt-type, Prohibited  CSO, §1604.1(a)(3)
Masts construction  CSO, §1604.5
Materials Carrying in  CSO, §1604.28
New installations, Inspections of CSO, §1604.26
Non-Guided Hoists, Prohibited  CSO, §1604.1(a)(4)
Oil buffers  CSO, §1604.14
Operating Devices & Control  CSO, §1604.24
Operation of Personnel Hoist CSO, §1604.26
Carrying Materials CSO, §1604.28
Overhead Beams CSO, §1604.7
Permanent Elevators, Temporary Use of CSO, §1604.4
Permit to Operate  CSO, §1604.29
Platforms  CSO, §1604.16
Inside net platform area determination  CSO, §1604.21
Protection of Control Equipment  CSO, §1604.9
Rack & Pinion Drive CSO, §1604.22(h)
Ropes  CSO, §1604.25
Rope Connections CSO, §1604.25(a), (i)
Rope Inspections CSO, §1604.25(j)
Runbys  CSO, §1604.10
Safety Devices CSO, §1604.19 
Disabling Safety Devices, Prohibition CSO, §1604.27(b)
Speed governors  CSO, §1604.20
Sectional counterweights  CSO, §1604.15
Sheaves, Driving Machines, & Drums CSO, §1604.22
Speed, Car  CSO, §1604.22(c)
Speed governors  CSO, §1604.20
Spring buffers  CSO, §1604.14
Stopping devices& Switches  CSO, §1604.23
Supports  CSO, §1604.5(d)
Suspension means  CSO, §1604.25(a)
Terminal Stopping Devices  CSO, §1604.23
Tests  CSO, §1604.26
Towers, Masts, Hoistway Enclosures  CSO, §1604.5
Unauthorized Person, Protection from  CSO, §1604.9(b)
Use of Hoists for Carrying Materials CSO, §1604.28
Voltages, Inside Cars & Hoistways  CSO, §1604.24(c)
Weather, Protection from  CSO, §1604.9(b)
Winding Drums CSO, §1604.22(b)
Wire-Rope Guided Hoists, Prohibited  CSO, §1604.1(a)(4)
Workers, Elevators for CSO, § 1630
Worms & Worm Drives CSO, §1604.22(e)
HOISTS, Personnel, Construction Hoist, at Tunneling Operations TSO, §8495(a)(18)
HOISTS, Personnel Hoist, at Mining Operations
Hoist for Hoisting Personnel  MSO, §7125
Hoist Signal System  MSO, §7139
Dual Signaling System MSO, §7140
Hoisting Cables
Method of Attaching to Conveyance MSO, §7138
Safety Hook MSO, §7138(a)
Use of Material Hoist Prohibited MSO, §7121(a)
Hoisting Practices MSO, Article 37
Loading Men on Personnel Hoist (Conveyance) MSO, §7146
Hoisting Personnel, General MSO, §7147
HOISTS, Trough, Food Service GISO, §4535
HOISTWAY, Elevator See also under ELEVATORS
HOLDERS, Toilet Paper   GISO, §3457(c)(3)(C)
HOLDING FURNACES, Die Casting GISO, §4266
HOLES, Guarding of Floor Openings   GISO, §3212
HOODS, Enclosures
Abrasive Blasting Operations GISO, §5151
Enclosures, Blast-Cleaning GISO, §5151(a)
Abrasive Wheels
Hoods, Protective GISO, §3577(b), (c)
Ventilation & Personal Protective Equipment GISO, §5152
Branch Duct Performance Requirements GISO, §5152(b)
Exhaust Volume GISO, §5152, Tables V1-5
Hood or Enclosure Requirement GISO, §5152(a)
Hood Performance Requirements GISO, §5152(b)
Hood Design GISO, §5152(c)
Hoods, Illustrations GISO, §5152, Fig. V-1--V-8
Portable Grinder & Polishers GISO, §5152(d)
Dipping / Immersion Tanks, Open-Surface, Ventilation Equipment GISO, §5154
Application GISO, §5154(a)
Classification of Tanks GISO, §5154(b)
Cleaning Equipment, Spray GISO, §5154(i)
Hazard Determination GISO, §5154, Table V-7
Vapor & Gas Evolution Rate  GISO, §5154, Table V-8
Control Methods, Other GISO, §5154(g)
Control Requirements GISO, §5154(c)
Velocity, Control GISO, §5154, Table V-9
Degreasing Equipment, Spray GISO, §5154(i)
Degreasing Equipment, Vapor GISO, §5154(h)
Hood Classification GISO, §5154(d)
Food & Tobacco Machines
Hoods, for Pan Washing Tanks GISO, §4538
Grinders, Abrasive Wheels, Protective Hoods GISO, §3577(b), (c)
Laboratory-Type Hoods 
Ventilation Requirements GISO, §5154.1
Application / Scope GISO, §5154.1(a)
Definitions GISO, §5154.1(b)
Operation Requirements GISO, §5154.1(d)
Operator Qualifications GISO, §5154.1(f)
Special Requirements GISO, §5154.1(e)
Ventilation Rates GISO, §5154.1(c)
  Mechanical Ventilation Systems  GISO, §5143
Metal Working Machines, Circular metal-cutting saws  GISO, §4231
Pan Washing Tanks, Food Service GISO, §4538
Radial Arm Saws, Woodworking GISO, §4309
Guard, Hood Enclosure    GISO, §4309(a)
Table Saws, Hood     GISO, §4300.1
Woodworking Machines, Hoods GISO, §4296
HOOK, Crane
Damage, Repair and Testing GISO, §5049
Damaged, Removal from Service Criteria  GISO, §5031(d)(1)
Inspection for Cracks, Deformation GISO, §5031(b)(4)
Lighting /Illumination of GISO, §4940
Safety Type Hooks, Overhead Loads GISO, §5002
HOOKAH DIVING  GISO, §6056(a)(5) 
Definition of GISO, §6051
HOPPERS, Bins & Bunkers
Construction Operations, at CSO, §1548
Curbs, Protecting  GISO, §3481(d) 
Engulfment Hazard Protection Requirements GISO, §3482
Fall Protection  GISO, §3481(a), (b), (e) 
Sawmills, Comply with GISO §3482 GISO, §6368(b)
Vehicle Bumper Stops  GISO, §3481(c) 
HORIZONTAL LIFELINES CSO, §1670(d)(1), (2)
HORIZONTAL PULL SAWS (See also Radial Arm Saw), Woodworking GISO, §4309 
HORIZONTAL ROTARY SPREADERS    GISO, §3442
HORIZONTAL SLIDING GATES GISO, §3324
Employee Instruction, Safe Operation of Gate GISO, §3324(c)
Installation, Maintenance, Construction of GISO, §3324(b)
Repairs By Qualified Person GISO, §3324(d)
Stops and Travel Limits GISO, §3324(a)
HORNS, Warning Devices   
Haulage & Earth Movers CSO, §1592(c)
Back-up Alarms CSO, §1592(a)
Forklifts, Warning Devices   GISO, §3661(c)
Industrial Tractors GISO, §3661
Automotive Trucks GISO, §3706(a)
Back-up Alarms GISO, §3706(b)
Vehicles, Employee Transport  GISO, §3702(b)
HORSE SCAFFOLDS CSO, §1647
                Illustration CSO, §1938, Appx B, Plate B-41
HOSE, Fire Hose & Standpipe Systems GISO, §6165
HOSE, Rotary & Circulating Hose & Standpipe Systems PSO-D&P, §6609
HOSES
Air & Life Steam  GISO, §3300
Air & Water, Securing on elevated locations CSO, §1700
Fire Hose Systems GISO, §6165
Mining Operations, Air hose requirements  GISO, §6997
Oil & Gas Well Operations, Steam hose requirements  PSO-D&P, §6781
Oil & Gas Refinery Operations, Standpipe requirements  PSO-R,T&H, §6609
Ship Building Repair & Breaking Operations
Steam hose requirements  SSO, §8378
Welding fuel hose requirements  SSO, §8394
HOT CHAMBER MACHINE CONTROLS, Die Casting GISO, §4261
HOT LIQUIDS, Protection from Hazardous Liquids GISO, §3302
Cover or Otherwise Guarded GISO, §3302(a)
Personal Protective Equipment GISO, §3302(b)
HOT MOPPING, Asphalt Roofing
Asphalt Fumes, Airborne Contaminant, Exposure limit  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Asphalt & Pitch Kettles CSO, §1726
Buckets, Kettles & Tankers, Handling of CSO, §1725
Handling CSO, §1725
Hot Asphalt & Hot Pitch Buckets  CSO, §1729
Kettles Mounted on Elevated Truck Beds  CSO, §1727
Specifications of Kettles CSO, §1726(a)-(c)
Specifications of Buckets and Gallows-Type Frames CSO, §1729
Fire Extinguisher CSO, §1726(d)
Mounted on Truck Beds CSO, §1727
Tar Pitch, Handling of CSO, §1728
HOT, PIPES & SURFACES GISO, §3308
HOT WEATHER, Heat Illness Prevention, Outdoor GISO, §3395
Access to Drinking Water GISO, §3395(c)
Maintenance of GISO, §3457(c)(3)
Access to Shade GISO, §3395(d)
>85°,  Shade Requirements GISO, §3395(d)(1)
≤85°,  Shade Requirements GISO, §3395(d)(2)
Agricultural Industry, Subject to Standard GISO, §3395(a)(2)(A)
Application & Scope GISO, §3395(a)(2)
Construction Industry, Subject to Standard GISO, §3395(a)(2)(B)
Cool-down Rest Period, Permitted at all Times GISO, §3395(d)(3)
Definitions GISO, §3395(b)
Drinking Water, Access to GISO, §3395(c)
Maintenance of GISO, §3457(c)(3)
High-Heat Procedure GISO, §3395(e)
Landscaping Industry, Subject to Standard GISO, §3395(a)(2)(C)
Landscaping Defined GISO, §3395(b)
Oil & Gas Extraction Industry, Subject to Standard GISO, §3395(a)(2)(D)
Rest Period, Cool-down, Permitted at all Times GISO, §3395(d)(3)
Temperature Triggers
>85°,  Shade Requirements GISO, §3395(d)(1)
≤85°,  Shade Requirements GISO, §3395(d)(2)
95°,  High-Heat Procedure GISO, §3395(e)
Training GISO, §3395(f)
Transportation of Agri-Products, Construction & other Heavy Materials, Subject to Standard GISO, §3395(a)(2)(E)
Exception, Operators in Air-conditioned Vehicles GISO, §3395(a)(2)(E)
HOT WORK, Procedures & Permits, per PSO-R,T&H PSO-R,T&H, §6777
Process Safety Management Requirement of GISO, §5189(k)
HOTELS, Storage of Class I, Class II  & Class IIIA Liquids  GISO, §5537
HOUSEHOLD APPLIANCES See APPLIANCES
HOUSEKEEPING, Site Cleaning, General, per CSO CSO, §1513
Asbestos work CSO, §1529
Cadmium-related work CSO, §1532 
HOUSEKEEPING, Site Cleaning, General, per GISO GISO, §3273(a) 
Fire Prevention Plan      GISO, §3221(c)
Sanitation Requirements    GISO, §3362(e)
HOUSEKEEPING, Site Cleaning, General, per SSO
Ship Building Worksites SSO, §8391
HOUSE-MOVING, Energized Electrical Power Lines, Working above ESO-HV, §2946
HUMAN IMMUNODEFICIENCY VIRUS (HIV) See BLOODBORNE PATHOGENS
HVAC SYSTEMS, Minimum Ventilation Requirements GISO, §5142
General System Requirements GISO, §5143
Inspections & Maintenance GISO, §5142(b)
Record keeping requirements GISO, §5142(b)(2), (3)
Operated during work hours GISO, §5142(a)
HYDRAULIC AUTOMOTIVE LIFTS    
Definition, Automotive Lift GISO, §3541
Air Tank, Working Pressure & Corrosion Protection GISO, §3546
Control Mechanism GISO, §3544
Descent Speed GISO, §3549
Design GISO, §3542(a)-(c)
Inspection, Operation, Maintenance GISO, §3542(d)
Marking / Labeling Requirements GISO, §3543 
Oil Measurement GISO, §3545
Oil Tank, Working Pressure & Corrosion Protection GISO, §3546
Working Area, Under Lift GISO, §3547
Supports, Chassis & Axle GISO, §3548
HYDRAULIC CRANES & Excavators    See also CRANES, Specific Heading
Application & Purpose GISO, §4945
General Requirements See under CRANES
Boom Hoist & Supporting Mechanism GISO, §4949
Brakes, Travel GISO, §4953
Controls  GISO, §4952
Electrical Requirements per ESO See CRANES & HOISTS, Requirements per ESO
General Operating Requirements GISO, §4954
Hoist Mechanism GISO, §4946
Hydraulic Relief Valves GISO, §4955
Illustration of Hydraulic Cranes GISO, §4885, Plate I, Fig. 14
Load Lowering  GISO, §4947
Operating Rules See under CRANES
Operator Qualifications GISO, §5006
Outrigger Use GISO, §4954(a)
Swing Lock & Swing Brake GISO, §4951
Telescopic Boom, Indicator GISO, §4954
HYDRAULIC DUMBWAITERS  ElevSO, §3079
HYDRAULIC ELEVATORS See under ELEVATORS
HYDRAULIC EQUIPMENT      GISO, §4196
HYDRAULIC MATERIAL LIFTS ElevSO, §3081
HYDRAULIC POWER PRESSES      GISO, §4189
Guarding of GISO, §4215
HYDRAULIC SHORING    CSO, §1541.1(c)(1)
                              See also EXCAVATION
HYDRAULIC POWER HAND TOOLS CSO, §1707(c)
HYDRAULIC MONITOR, per MSO MSO, §6998
HYDRAZINE
Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HYDROCARBONS
Breathing Air, Permissible Content GISO, §5144(i)(1)
Loading & Unloading PSO-R,T&H, §6881
HYDROCHLORIC ACID
Process safety management for acutely hazardous substances  GISO, §5189, Appx A
HYDROFLUORIC ACID
Process safely management for acutely hazardous substances  GISO, §5189, Appx A
HYDROGEN  GISO, Article 138
Electrical Systems Requirements GISO, §5489 
Gaseous Hydrogen (GH) Systems
Building, Design Requirements GISO, §5475
Consumer Sites, at  GISO, §5465
Design Considerations at Specific Locations GISO, §5474
Design Requirements, Gaseous Hydrogen GISO, §5466
Determination by total contained volume GISO, §5473
Equipment Assembly GISO, §5469
GH Systems at Consumer Sites GISO, §5465
Location of Gaseous Hydrogen Systems GISO, §5472
Design Considerations at Specific Locations GISO, §5474
Maintenance GISO, §5478 
Marking of Storage Locations GISO, §5470
Operating Instructions GISO, §5477 
Piping tubing and fittings  GISO, §5485
Rooms, Special, Requirements GISO, §5476
Safety Relief Devices GISO, §5467
Separate buildings  GISO, §5475
Special Requirements GISO, §5473
Special Rooms  GISO, §5476
Storage Locations, Marking of GISO, §5470
Testing, Piping tubing and fittings GISO, §5471
Ventilation  GISO, §5473
Liquefied Hydrogen (LH) Systems
Bonding, Container & Associated Piping GISO, §5490 
Buildings, Separate GISO, §5495 
Consumer sites  GISO, §5480
Container Supports, Permanently Installed  GISO, §5482 
Bonding and grounding GISO, §5490
Marking of GISO, §5483
Safety Relief Devices GISO, §5484
Design Considerations at Specific Locations GISO, §5494 
Design Requirements, Liquefied Hydrogen GISO, §5481 
Electrical wiring and equipment  GISO, §5489
Equipment Assembly GISO, §5486 
Grounding, Container & Associated Piping GISO, §5490 
Handling of Liquefied Hydrogen  GISO, §5493 
Liquefied Hydrogen Vaporizers GISO, §5488 
LH Systems at Consumer Sites GISO, §5480 
Maintenance of GISO, §5498 
Marking of Containers containing GISO, §5483 
Operating Instructions GISO, §5497 
Piping tubing and fittings  GISO, §5485
Testing GISO, §5487
Field erected Piping GISO, §5487(a) 
Rooms, Special GISO, §5496 
Safety Relief Devices for LH Container GISO, §5484 
Separate Buildings GISO, §5495 
Specific Requirements GISO, §5492 
Storage Requirements GISO, §5492 
Storage Location of Liquefied Hydrogen GISO, §5491 
Supports, Permanently Installed Containers  GISO, §5482 
Vaporizers GISO, §5488 
Signs, Hydrogen Storage locations  GISO, §5470
Testing
Containers, Previously Out of Service  GISO, §5487(b) 
Field erected Piping GISO, §5487(a) 
Piping, Tubing & Fittings, After Installation,  GISO, §5471 
Vaporizers, Liquefied Hydrogen GISO, §5488 
Yard surfaces below piping construction  GISO, §5494
HYDROGENATED TERPHENYLS
Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HYDROGEN BROMIDE
Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management for acutely hazardous substances  GISO, §5189, Appx A
HYDROGEN CHLORIDE
Exposure limits  GISO, §5155, & Appx A
Hazard of, During Fires involving Methylene chloride #NAME?
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management for acutely hazardous substances  GISO, §5189, Appx A
HYDROGEN CYANIDE
Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management for acutely hazardous substances  GISO, §5189, Appx A
HYDROGEN FLUORIDE
Airborne Contaminant, Exposure limit GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management for acutely hazardous substances  GISO, §5189, Appx A
HYDROGEN GAS       See HYDROGEN
HYDROGEN PEROXIDE
Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management for acutely hazardous substances  GISO, §5189, Appx A
HYDROGEN SELENIDE
Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management for acutely hazardous substances  GISO, §5189, Appx A
HYDROGEN SULFIDE
Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
Process safety management for acutely hazardous substances  GISO, §5189, Appx A
HYDROGEN SULFIDE, per TSO TSO, §8424(d)
HYDRO-PNEUMATIC LIFT, Automotive Lifts See GISO, Article 19
Definition, Automotive Lift GISO, §3541(e)
Air Tank, Working Pressure & Corrosion Protection GISO, §3546
Control Mechanism GISO, §3544
Descent Speed GISO, §3549
Design GISO, §3542(a)-(c)
Inspection, Operation, Maintenance GISO, §3542(d)
Marking / Labeling Requirements GISO, §3543 
Oil Measurement GISO, §3545
Oil Tank, Working Pressure & Corrosion Protection GISO, §3546
Working Area, Under Lift GISO, §3547
Supports, Chassis & Axle GISO, §3548
HYDROQUINONE
Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1
HYDROSTATIC TESTING     GISO, §4653
HYDROXYLAMINE
Process safety management for acutely hazardous substances  GISO, §5189, Appx A 
HYDROXYPROPYL ACRYLATE
Exposure limits  GISO, §5155, & Appx A
Listed, Permissible Exposure Limits GISO, §5155, Table AC-1