CONFINED SPACE DEFINITION OSHA 29 CFR 1910.146

2. CONFINED SPACE HAZARDS ATMOSPHERIC HAZARDS OXYGEN DEFICIENCY OXYGEN ENRICHED TOXIC OR IRRITATING ATMOSPHERE PHYSICAL HAZARDS FIXED & PORTABLE MECHANICAL EQUIPMENT ELECTRICALLY ENERGIZED CONDUCTORS FLUIDS: LIQUIDS, POWDERS & GASES THERMAL CONDITION : HOT OR COLD ENGULFMENT BY FINELY DEVIDED MATERIAL IONIZING AND NON-IONIZING RADIATION CONTACT WITH CORROSIVE SUBSTANCES

3. OXYGEN-DEFICIENT (<19.5 %) & OXYGEN-ENRICHED (>23.5 %) ATMOSPHERE CAUSES OF OXYGEN DEFICIENT CONDITIONS CONSUMED BY CHEMICAL REACTIONS LIKE OXIDATION CONSUMPTION DUE TO RUSTING OR CORROSION CONSUMPTION BY FERMENTATION OF ORGANIC MATTER OXYGEN DISPLACEMENT BY NITROGEN OR INERT GAS ADSORPTION BY CARBON OR CHARCOAL CAUSES OF OXYGEN ENRICHED CONDITIONS LEAK THROUGH OXYGEN USAGE LINE COMPRESSED O2 USED TO DISLODGE WELDING SLAG LEAKING OXYGEN TUBING FROM CUTTING TORCH

4. FLAMMABLE ATMOSPHERE FLAMMABLE GASES AND VAPOURS FLASH POINT, FIRE POINT AND IGNITION POINT FLAMMABLE LIMITS LEL & UEL IGNITION ENERGY VAPOUR DENSITY EFFECTS OF TEMPERATURE & PRESSURE ON FLAMMABILITY COMBUSTIBLE DUSTS IGNITION SENSITIVITY IGNITION TEMPERATURE IGNITION ENERGY

5. SOURCES OF IGNITION OPEN FLAMES ELECTRICAL ARCING FRICTIONAL SPARKS HOT SURFACES STATIC ELECTRICITY CHEMICAL REACTIONS USE OF NON FLAMEPROOF ELECTRICAL EQUIPMENT

6. CONTROL OF IGNITION HAZARDS NON-SPARKING TOOLS APPROVED ELECTRICAL EQUIPMENT INTRINSICALLY SAFE EQUIPMENT EXPLOSION PROOF EQUIPMENT SPECIAL HOT WORK PRECAUTIONS VESSEL INERTING FOR EXTERIOR HOTWORK GAS CUTTING TORCHES AND THEIR VALVES HOSES AND REGULATORS COMPRESSED GAS CYLINDERS FIRE PREVENTION & PROTECTION

7. TOXIC ATMOSPHERES(GAS, DUST, FUME, MIST & VAPOURS) ASSESSING TOXIC ATMOSPHERES PREVIOUS CONTENTS POSSIBLE CHEMICAL REACTIONS OPERATIONS PERFORMED EX. SOLVENT CLEANING, PAINTING, DEGREASING, WELDING, BLASTING ETC. TOXICOLOGICAL PRINCIPLES TOXICITY VS HAZARDS DOSE RESPONSE LOCAL VS SYSTEMIC EFFECT ACUTE VS CRONIC EXPOSURES & EFFECTS EXPOSURE STANDARDS THRESHOLD LIMIT VALUES (TLVs) TIME WEIGHTED AVERAGES (TWAs) STEL, CEILING CONCENTRATIONS & IDLH

8. VESSEL ENTRY PROGRAM REQUIREMENT HAZARD IDENTIFICATION CHARACTERISTICS OF THE SPACE ATMOSPHERIC HAZARDS PHYSICAL HAZARDS OTHER CONSIDERATIONS DETERMINING THE REASON FOR ENTRY PHYSICAL CHARACTERISTIC SURVEY SIZE AND CONFIGURATION SPACE MOBILITY ATTACHED EQUIPMENT LIGHTING PREVIOUS CONTENTS DETERMINE OPERATIONS TO BE PERFORMED VISUAL INSPECTION

9. HAZARD CONTROL RANKING HAZARDS HAZARD SEVERITY PROBABILITY OF OCCURRENCE HAZARD ASSESSMENT GENERAL CONTROL STRATEGIES CONTROL OF UNAUTHORIZED ENTRY EXTERNAL HAZARD PROTECTION DRAINING AND FLUSHING TO REMOVE RESIDUE LOCKOUT-TAGOUT PROCEDURES DISCONNECTING AND BLANKING LINES PURGING AND VENTING PROTECTIVE EQUIPMENT