Chapter 3: Programs and Exposure Control Plans¶

Part 2: Exposure Control Plans¶

3.6 Silica Exposure Control Plan¶

3.6.1 Purpose and Scope¶

Respirable crystalline silica is serious lung hazard present in refractory materials used in thermal energy systems.

Applies to: Installation of refractory in boilers/heaters/furnaces, repair/patching of existing refractory linings, removal/demolition of refractory (tear-out), cutting/grinding/drilling of refractory, any activity generating airborne dust from silica-containing materials.

Silica-Containing Materials: Refractory bricks/blocks (firebrick, insulating brick), castable refractory (monolithic linings), ceramic fiber products (blanket, board, rope), mortar/grout for refractory installation, abrasive blasting materials (if used).

3.6.2 Health Effects and Regulatory Requirements¶

Crystalline silica becomes hazardous when particles small enough to be inhaled (respirable fraction - particles <10 microns).

Health Effects: Silicosis (progressive, incurable lung disease causing scarring, shortness of breath, increased infection risk, can be fatal), lung cancer (classified human carcinogen by IARC), COPD (emphysema, chronic bronchitis), kidney disease (chronic kidney disease, kidney failure), autoimmune disorders (rheumatoid arthritis, scleroderma, lupus).

Latency: Silicosis can develop after 10-20 years exposure. Early stages may be symptom-free. Once developed, irreversible. There is no safe level of silica exposure - control to lowest feasible level.

Regulatory: WorkSafe BC OHS Regulation, Part 5.48 (Respirable Crystalline Silica). WorkSafe BC OEL: 0.025 mg/m³ (8-hour TWA). ACGIH TLV: 0.025 mg/m³ (8-hour TWA).

3.6.3 Exposure Assessment¶

Exposure Level	Tasks
High	Dry cutting refractory (grinder, cut-off saw), dry drilling refractory, demolition/tear-out of linings (jackhammer, chipping hammer), dry sweeping/cleanup of dust, abrasive blasting of refractory
Moderate	Mixing refractory castable/mortar (dry powder airborne), installation with dry mortar, grinding/sanding installed refractory (finishing), chipping/chiseling small areas
Low	Installation of pre-cut materials (no cutting on site), wet cleanup methods (water suppression), installation of ceramic fiber (handling, placement)

3.6.4 Hierarchy of Controls¶

Elimination: Use pre-fabricated components (minimize on-site cutting), use silica-free/low-silica alternatives where feasible, plan work to minimize cutting/grinding/demolition.
Substitution: Substitute high-silica with lower-silica alternatives (where performance allows), use wet-mix refractory instead of dry-mix (reduces airborne dust).
Engineering Controls:
Wet methods: Water to suppress dust during cutting/drilling/grinding/demolition
- Water-fed grinders/saws
- Water spray during demolition
- Wet cleanup with HEPA vacuum OR wet mop
- Never dry sweep
Local exhaust ventilation: Dust collection at source
- Grinders/saws with integrated dust collection
- Portable HEPA vacuum systems attached to tools
General ventilation: Increase air movement to dilute airborne dust (supplement, not primary control)
Administrative Controls:
Limit duration of high-exposure tasks
Rotate workers to minimize individual exposure
Restrict access to work areas (keep non-essential personnel away)
Good housekeeping (frequent cleanup to prevent dust accumulation/re-suspension)
PPE:
Respiratory protection (Section 3.6.5 and Section 3.9)
Protective clothing to prevent dust on skin/clothing
Eye protection (safety glasses minimum, goggles if heavy dust)

PPE is LAST line of defense - engineering/administrative controls implemented first.

3.6.5 Respiratory Protection and Work Practices¶

Exposure Level	Minimum Respiratory Protection	Controls Required
Low (occasional, minimal dust)	N95 filtering facepiece (disposable)	Wet methods or pre-cut materials
Moderate (regular work, visible dust)	P100 filtering facepiece OR half-face elastomeric with P100	Wet methods + dust collection
High (demolition, heavy dust)	Half-face with P100 OR full-face with P100 OR PAPR with HEPA	Wet methods + containment + ventilation

All respiratory protection must comply with Respiratory Protection Program (Section 3.9). Fit testing required, medical clearance required, clean-shaven (no facial hair interfering with seal).

Work Practices: Before beginning: plan to minimize dust, ensure water supply available, verify dust collection equipment functional, set up containment if indoors, clear non-essential personnel, don respiratory protection/protective clothing. During: use wet methods consistently, position upwind when possible, take breaks in clean air, do not eat/drink/smoke in work area, monitor respirator seal/function. After: clean area with wet methods or HEPA vacuum, dispose of waste in sealed bags/containers, remove protective clothing before leaving (prevent contaminating vehicles/home), wash hands/face before eating/drinking/smoking, clean/dispose of respirator per manufacturer.

Personal Hygiene: Shower/change clothes at end of shift if heavily exposed, launder work clothes separately from family laundry, do not shake out dusty clothing (wet down first or vacuum with HEPA), do not bring contaminated clothing home (leave at work for laundering).

3.6.6 Air Monitoring and Medical Surveillance¶

Air Monitoring Conducted When: Silica work begins on new project/task, new materials/methods introduced, work conditions change significantly, workers report respiratory symptoms potentially related to silica.

Methods: Personal breathing zone samples (pump/filter cassette worn by worker), area samples (stationary monitors), analysis by accredited laboratory (NIOSH Method 7500 or 7602), comparison to WorkSafe BC OEL (0.025 mg/m³ 8-hour TWA).

If Above OEL: Increase engineering controls (more water, better ventilation, dust collection), enhance administrative controls (reduce task duration, rotate workers), upgrade respiratory protection (higher APF), re-sample after implementing controls, repeat monitoring annually or when conditions change. Air monitoring records retained 30 years (worker exposure records).

Medical Surveillance Required For: Workers exposed at/above Action Level (0.0125 mg/m³, 50% of OEL) for 30+ days per year, workers using respirators for silica protection regularly, any worker showing symptoms.

Medical Surveillance Includes: Baseline medical exam before beginning silica work (medical history, chest X-ray, pulmonary function test, physical exam), periodic exams (every 3 years or more frequently if high exposure/symptoms), exit exam when leaving silica work (final X-ray, pulmonary function test). Medical surveillance conducted by physician or occupational health nurse familiar with silica health effects. Records retained employment duration + 30 years. If medical exam indicates silica-related health effects: remove worker from silica exposure (reassign to non-silica work), refer to specialist (pulmonologist), review/enhance exposure controls, increase frequency of medical surveillance for remaining silica workers.

3.6.7 Training and Documentation¶

Training - All Workers Performing Silica Work: Silica hazard awareness (health effects, OELs, tasks generating exposure, recognition of silica-containing materials), silica control measures (hierarchy, wet methods, dust collection operation/maintenance, good housekeeping), respiratory protection (Section 3.9, specific to respirators used, fit testing annually). Frequency: initial before beginning silica work, annual refresher, additional when new methods/materials introduced.

Records: Silica exposure assessment (tasks, materials, exposure levels), air monitoring results (personal/area samples), medical surveillance records (exams, X-rays, pulmonary function tests), training records, respiratory protection fit test records (Section 3.9), control measure effectiveness evaluations. Retention: Exposure/medical records: 30 years after termination. Training: employment + 2 years. Air monitoring: 30 years.

See: Silica Exposure Control Procedure (SI-001).

3.7 Asbestos Recognition and Management¶

3.7.1 Purpose and Scope¶

Asbestos is hazardous material that may be encountered in older thermal energy systems, particularly in insulation on boilers, heaters, piping, ductwork.

4Core does not perform asbestos abatement or removal. This program focuses on: recognition of potential ACM in work areas, procedures to avoid disturbing ACM, stop-work protocols when ACM encountered, coordination with qualified asbestos contractors for testing/removal.

3.7.2 Health Effects and Regulatory Requirements¶

Asbestos exposure causes serious, often fatal diseases: Asbestosis (scarring of lung tissue, progressive/incurable), lung cancer (increased risk, especially in smokers), mesothelioma (rare, aggressive cancer of lung/abdomen lining, almost always fatal), other cancers (larynx, ovary, gastrointestinal).

Key Characteristics: Long latency period (diseases develop 10-40 years after exposure), no safe level of asbestos exposure, cumulative risk (each exposure adds to lifetime risk), synergy with smoking (smoking + asbestos dramatically increases lung cancer risk). There is no treatment or cure for asbestos-related diseases.

Regulatory: WorkSafe BC OHS Regulation, Part 6.2 (Asbestos), Part 20.60 (Asbestos Surveys), BC Hazardous Waste Regulation (asbestos disposal).

3.7.3 Where Asbestos May Be Encountered¶

Probability	Locations in Thermal Energy Systems
High (Pre-1990)	Thermal insulation on boilers/heaters/tanks/vessels, pipe insulation (especially steam/high-temperature lines), gaskets/packing (valve packing, flange gaskets), boiler rope seals/door gaskets, refractory cement/coatings, spray-applied fireproofing (structural steel), thermal blankets/removable insulation covers
Moderate	Ceiling tiles/acoustic insulation in mechanical rooms, floor tiles/mastic in older facilities, roofing materials/siding, ductwork insulation/sealing materials

Asbestos Use in Canada: Pre-1990: commonly used. 1990-2018: declining but not prohibited. Post-2018: banned (but still present in older buildings/equipment).

Rule of Thumb: Assume all thermal insulation and gaskets in systems built before 1990 contain asbestos until proven otherwise by testing.

3.7.4 Roles and Responsibilities¶

Management: Ensure asbestos awareness training provided to all workers, stop work when ACM encountered/suspected, arrange for asbestos testing by qualified professionals, engage qualified asbestos contractors for abatement/removal, maintain records of testing/abatement.

Asbestos Recognition Specialist: Conduct visual assessment of work areas for potential ACM, recognize characteristics of asbestos-containing insulation/materials, advise supervisors/management when ACM suspected, recommend areas requiring testing before work proceeds, coordinate with qualified asbestos consultants for sampling/testing. Note: Robert Peacock has extensive experience in asbestos removal as Red Seal Heat & Frost Mechanical Insulator. This experience provides valuable recognition capability but does not authorize 4Core to perform asbestos abatement work.

Supervisors: Consult with Asbestos Recognition Specialist before beginning work on pre-1990 equipment, stop work if ACM discovered/suspected, ensure workers do not disturb suspected ACM, coordinate with management for testing/abatement, ensure client notified if ACM discovered on their site.

Workers: Report any material suspected to be ACM to supervisor immediately, do not disturb/cut/drill/grind/remove any suspected ACM, leave area if ACM has been disturbed (dust/debris released), follow decontamination procedures if exposed.

3.7.5 Recognition and Procedures¶

Visual Indicators That Insulation MAY Contain Asbestos: - Appearance: White/gray/tan fibrous material (looks like cotton or wool), corrugated paper-like covering on pipe insulation ("hard paper jacket"), "mag block" insulation (white blocks with canvas or burlap covering), plaster-like coating on pipes/equipment (asbestos cement), rope-like gaskets on boiler doors/manways - Texture: Soft, fibrous, easily crumbles when touched (friable), hard plaster-like coating that may contain asbestos fibers - Age: Equipment/building constructed before 1990, original insulation on older boilers/heaters/piping - Labeling: Some ACM may be labeled "Caution: Contains Asbestos" or similar warning. Absence of label DOES NOT mean asbestos-free (labels often missing or painted over).

CRITICAL: Visual inspection alone CANNOT confirm presence or absence of asbestos. Laboratory testing is only definitive method.

Before Beginning Work on Pre-1990 Equipment: 1. Pre-Work Assessment: Asbestos Recognition Specialist [Title / Role here] inspects work area, identifies any materials suspected to be ACM, reviews available records (previous surveys, specifications). 2. Testing Decision: If ACM suspected: recommend testing before work proceeds. If work can be performed without disturbing suspected material: may proceed with caution (treat as ACM, avoid contact). If work will disturb suspected material: testing REQUIRED before proceeding. 3. Arrange Testing: Engage qualified asbestos consultant (designated under WorkSafe BC regulations), consultant collects samples following WorkSafe BC protocols, laboratory analysis by accredited lab (Polarized Light Microscopy - PLM method), testing typically 2-5 days for results. 4. Review Results: If asbestos confirmed: proceed to abatement (Step 5). If asbestos not detected: work may proceed (keep test report for records). 5. Abatement Coordination: Engage qualified asbestos abatement contractor (WorkSafe BC certified), contractor removes or encapsulates ACM per WorkSafe BC regulations, obtain clearance certificate from asbestos consultant (air testing confirms safe levels), 4Core work proceeds only after clearance obtained.

If ACM Discovered During Work (Unexpected Encounter): 1. STOP WORK IMMEDIATELY: Do not continue cutting/drilling/grinding/removing material, leave area to avoid further exposure, notify supervisor immediately. 2. Isolate Area: Prevent others from entering, post "Danger: Asbestos - Do Not Enter" signs, turn off ventilation systems if ACM dust may be circulating. 3. Assessment: Asbestos Recognition Specialist assesses situation, determines extent of disturbance (is dust/debris released?), identifies workers who may have been exposed. 4. Exposure Response: If ACM was disturbed (dust generated): exposed workers remove contaminated clothing carefully (minimize dust release), wash exposed skin with soap and water, document exposure (names, duration, extent), arrange medical surveillance if significant exposure suspected. If ACM not disturbed (discovered before contact): less urgent but still requires stop-work and testing. 5. Client Notification: Notify client/site owner immediately. ACM on their equipment/facility is their responsibility. Client must arrange testing/abatement. 6. Testing and Abatement: Follow Steps 3-5 from pre-work procedure above. WorkSafe BC notification may be required (consult with asbestos consultant). 7. Return to Work: Work resumes only after: ACM removed/encapsulated by qualified contractor, clearance certificate obtained (air testing shows safe levels), area cleaned and safe for re-entry.

Working Near Known ACM: If ACM present but work will not disturb it: Encapsulated/sealed ACM in good condition poses low risk if undisturbed, work may proceed IF no cutting/drilling/contact with ACM, mark ACM locations clearly to avoid accidental contact, periodic inspection to ensure encapsulation remains intact. Requirements: workers trained in asbestos awareness (recognize and avoid), clear boundaries established (barriers, signage), supervision to ensure ACM not contacted, stop-work procedure if ACM accidentally disturbed. If work will bring workers into close proximity: consider having ACM removed before work begins (safest option), or use engineering controls (barriers, local exhaust ventilation) and work practices to prevent contact.

3.7.6 Training and Documentation¶

Training - All 4Core Workers (Asbestos Awareness): Health effects of asbestos exposure, where asbestos may be encountered in our work, recognition of potential ACM (visual indicators), procedures when ACM suspected (stop work, notify supervisor), prohibition on disturbing suspected ACM, personal protection if ACM accidentally disturbed. Frequency: initial during orientation, refresher every 3 years.

Asbestos Recognition Specialist (Bob): Formal asbestos awareness training, leverages Red Seal Heat & Frost Insulator training and experience in asbestos removal, stays current on ACM recognition methods and WorkSafe BC requirements.

Records: Asbestos awareness training records (all workers), asbestos testing reports (samples collected, laboratory results), asbestos abatement plans/clearance certificates (when abatement performed), exposure records (if workers exposed to ACM). Retention: Training: employment + 2 years. Testing/abatement: permanent (associated with specific equipment/facility). Exposure: 30 years after termination.

See: Asbestos Recognition Procedure (AS-001).

3.9 Respiratory Protection Program¶

3.9.1 Purpose and Scope¶

Respirators protect workers from inhaling hazardous airborne contaminants when engineering/administrative controls insufficient to reduce exposure to safe levels.

Applies when respirators used to protect against: Oxygen-deficient atmospheres (confined spaces), toxic gases/vapors (CO, H₂S, thermal oil vapor), welding fumes/combustion products, respirable crystalline silica (refractory dust), nuisance dusts/particulates, any other airborne contaminant requiring respiratory protection.

3.9.2 Regulatory Requirements and Hierarchy¶

WorkSafe BC OHS Regulation, Part 8 (Personal Protective Equipment)
CSA Z94.4 (Selection, Use, and Care of Respirators)
NIOSH 42 CFR Part 84 (Respirator Certification)

Respirators are LAST line of defense. Before requiring respirators: 1. Eliminate hazard (change process), 2. Substitute less hazardous materials, 3. Engineering controls (ventilation, dust suppression, local exhaust), 4. Administrative controls (limit exposure duration, rotate workers).

Respirators required when: Engineering/administrative controls insufficient to reduce exposure below OEL, during confined space entry (IDLH atmospheres), during implementation of engineering controls (interim protection), for emergency escape/rescue operations, when required by regulation (e.g., silica exposure above action level).

3.9.3 Roles and Responsibilities¶

Management: Provide appropriate respirators at no cost, ensure medical clearance obtained before use, ensure fit testing conducted before initial use and annually, provide training, maintain respirator inventory/replacement parts.

Safety Officer: Administer respiratory protection program, coordinate medical evaluations/fit testing, maintain training/fit test records, conduct program audits/effectiveness reviews, investigate failures/concerns.

Supervisors: Ensure workers use appropriate respirators for hazards present, verify workers medically cleared/fit tested before use, monitor proper donning/use/maintenance, ensure respirators available/in good condition, enforce use requirements.

Workers: Use respirators when required/as trained, perform user seal check each time respirator donned, inspect before each use (condition, function), maintain in clean/functional condition, report damaged/malfunctioning respirators immediately, store properly when not in use, maintain clean-shaven face (tight-fitting respirators require proper seal).

3.9.4 Types of Respirators¶

Type	APF	Use	Limitations
N95 Filtering Facepiece	10	Nuisance dust, low-level silica, welding fume (limited use)	No protection against gases/vapors, limited use time (becomes clogged or wet)
P100 Filtering Facepiece	10	Higher filtration (99.97%), oil-resistant	Same as N95 but better particulate filtration
Half-Face Elastomeric	10	Silica, welding fumes, organic vapors (with appropriate cartridge)	No eye protection, facial hair prevents seal
Full-Face Elastomeric	50	Higher exposure levels, eye protection needed	More expensive, requires more training, facial hair prevents seal
PAPR (Loose-fitting hood)	25	High-exposure silica, extended duration, workers who cannot achieve fit	Battery life, higher cost, more maintenance
PAPR (Tight-fitting full-face)	1000	Very high exposure levels	Battery life, cost, extensive training
SAR/SCBA	1000	IDLH atmospheres (confined spaces with O₂ deficiency or high toxics), emergency escape	Mobility restricted (airline), limited duration (SCBA cylinder), expensive, extensive training

APF = Assigned Protection Factor

3.9.5 Respirator Selection¶

Based on: 1. Hazard present (contaminant type), 2. Concentration level (air monitoring or reasonable worst-case estimate), 3. Exposure duration, 4. Work activity (physical exertion, mobility requirements), 5. Environmental conditions (temperature, humidity, confined space), 6. Worker factors (facial hair, eyeglasses, medical limitations).

Selection Process: 1. Identify Hazard: O₂-deficient (<19.5%) → SAR/SCBA required (APR will not work). IDLH atmosphere → SCBA or SAR with escape capability required. Particulate hazard (dust, silica, welding fume) → Particulate filter (N95, P100). Gas/vapor hazard (organic vapor, acid gas) → Gas/vapor cartridge (must match contaminant). Combination hazard → Combination cartridge (particulate + gas/vapor). 2. Determine Required APF: Calculate: Required APF = Exposure Concentration ÷ OEL. Example: Silica exposure 0.10 mg/m³, OEL 0.025 mg/m³ → Required APF = 4. Select respirator with APF ≥ required APF (N95 with APF 10 adequate; P100 with APF 10 provides higher filtration and preferred). 3. Select Respirator Type: Prefer higher APF when feasible (better margin of safety), consider comfort/practicality (worker more likely to wear comfortable respirator correctly), consider work environment (full-face for eye protection, PAPR for extended wear, SAR for confined space).

Common 4Core Selections: - Confined Space (O₂ Deficiency, IDLH): SAR with escape cylinder OR SCBA (APF 1000). Continuous atmospheric monitoring required, rescue plan required. - Silica (Refractory Work): Low: N95 (APF 10). Moderate: P100 OR half-face with P100 (APF 10). High: Full-face with P100 (APF 50) OR PAPR with HEPA (APF 25-1000). Wet methods/dust collection preferred; respirator as backup. - Welding Fumes: Light: P100 (APF 10). Heavy/confined space: Half-face with P100 (APF 10) OR welding helmet with PAPR (APF 25). Ventilation required; respirator as supplement. - Thermal Oil Vapors (Hot Work): Low vapor: Organic vapor cartridge, half-face (APF 10). Higher vapor: Organic vapor cartridge, full-face (APF 50). IDLH (high vapor, unknown concentration): SAR or SCBA (APF 1000). Atmosphere must be tested; if LEL >10% or unknown, use SAR/SCBA. Use of SAR/SCBA will be handled be experienced contractors as 4Core is not certifed to use this equipment.

3.9.6 Medical Clearance and Fit Testing¶

Medical Evaluation Required BEFORE: Initial use of any respirator (including N95), change to different respirator type, worker reports medical concerns related to use, supervisor/healthcare provider recommends evaluation.

Methods: Questionnaire (completed by worker, reviewed by PLHCP - Physician or Other Licensed Healthcare Professional), follow-up exam (if questionnaire indicates potential concerns - respiratory conditions, heart disease, claustrophobia).

Determines: Can worker safely wear respirator? Limitations on respirator type or duration? Accommodations needed (e.g., PAPR instead of tight-fitting)? Medical clearance: written statement from PLHCP that worker cleared to wear specific respirator type, valid indefinitely unless health status changes, re-evaluation required if worker reports difficulty breathing/dizziness/chest pain/symptoms while wearing. Confidentiality: medical evaluation results confidential between worker and PLHCP, only clearance status shared with employer ("cleared" or "not cleared" or "cleared with limitations").

Fit Testing Required for All Tight-Fitting Respirators: Initial fit test before first use (must pass with specific make/model/size), annual fit test (repeat at least every 12 months, more frequently if worker's physical condition changes significantly - weight gain/loss, dental work, facial scars).

Fit Test Methods: Quantitative (preferred): uses machine (PortaCount) to measure leakage, objective numerical result (fit factor), pass/fail based on fit factor: ≥100 for half-face, ≥500 for full-face, more reliable. Qualitative: uses test agent (sweet/bitter aerosol, irritant smoke), pass if worker cannot taste/smell test agent, subjective but acceptable for half-face (not full-face).

Fit Test Exercises: Normal breathing, deep breathing, turning head side-to-side, moving head up-and-down, talking, bending over, normal breathing. Simulates movements during actual work.

If Fit Test Fails: Try different size or model, check proper donning (straps adjusted, seal positioned correctly), check for facial hair/glasses interfering with seal, if cannot achieve fit: use PAPR with loose-fitting hood (no fit test required).

Facial Hair: Tight-fitting respirators require clean-shaven face where respirator seals to skin. Mustache acceptable if does not interfere with seal. Full beard prevents seal → cannot use tight-fitting respirator → use PAPR with loose-fitting hood.

3.9.7 Use Procedures and Maintenance¶

Before Each Use: 1. Inspect: Facepiece (cracks, tears, distortion, dirt buildup), straps (elasticity, attachment points intact), valves (exhalation valve for cracks, proper seating), filters/cartridges (damage, expiration date, change indicator if equipped), PAPR (battery charge, blower function, airflow). 2. Don: Position facepiece on face, ensure proper alignment, pull straps over head (do not cross straps), adjust for snug but comfortable fit (not overly tight), ensure no hair/clothing/glasses interfering with seal. 3. User Seal Check (CRITICAL - Do this EVERY time): Positive pressure check: cover exhalation valve, exhale gently - facepiece should bulge slightly, no air should leak out. Negative pressure check: cover filter/cartridge inlets, inhale gently - facepiece should collapse slightly against face, no air should leak in. If leakage detected: re-adjust straps and repeat seal check until proper seal achieved. If proper seal cannot be achieved: DO NOT USE - try different size/model or use alternative respirator type.

During Use: Monitor breathing resistance (if increases, cartridge may be clogged - replace), monitor for odor breakthrough (if smell contaminant, cartridge exhausted - replace immediately and exit area), re-perform seal check if respirator shifted or was adjusted, exit contaminated area immediately if respirator fails or worker experiences breathing difficulty/dizziness/symptoms.

After Use: Remove carefully (do not touch contaminated exterior), inspect for damage, clean and disinfect (reusable respirators), replace filters/cartridges if exhausted/contaminated, store properly (clean, dry location, protected from damage).

Cartridge/Filter Change-Out - Change When: Breathing resistance increases noticeably, odor/taste/irritation detected (contaminant breakthrough - immediate change required), manufacturer's recommended service life reached, visual inspection shows damage/contamination, end-of-service-life indicator (ESLI) activates (if equipped).

4Core Practice: Replace organic vapor cartridges daily when used for thermal oil vapor protection (do not rely on odor breakthrough - may not provide adequate warning), replace particulate filters when breathing resistance increases, maintain stock of spare filters/cartridges at all times.

Cleaning Reusable Respirators: After each day's use (if used by one person), before different worker uses (if shared - NOT preferred practice), as needed during use (if contaminated). Procedure: 1. Remove filters and cartridges, 2. Disassemble facepiece per manufacturer, 3. Wash facepiece/components in warm water with mild detergent, 4. Rinse thoroughly with clean water, 5. Wipe with disinfectant (quaternary ammonium solution, alcohol wipes), 6. Air dry completely (do not use heat - can damage components), 7. Reassemble, 8. Inspect all components for damage, 9. Install new filters/cartridges, 10. Store in clean, dry, sealed container (plastic bag or case).

Storage: Store in clean, dry location, protect from physical damage/sunlight/extreme temperatures/chemicals, store SCBA cylinders upright/fully charged, do not hang respirators by straps (can stretch and distort).

3.9.8 Training and Documentation¶

Training - All Workers Using Respirators: Initial respirator training (why necessary, how works/limitations, how to inspect/put on/remove/check fit, how to perform user seal check, how to recognize when cartridge needs changing, proper maintenance/storage, medical signs/symptoms limiting effective use, responsibilities under this program), respirator-specific training (specific instructions for make/model worker will use, how to change cartridges/filters, how to clean/disinfect, emergency procedures). Frequency: initial before first use, annual refresher, additional when new respirator type introduced or when worker demonstrates lack of understanding. Confined Space SAR/SCBA: extended training (significantly more complex), includes emergency procedures/cylinder change/emergency escape, practical exercises with equipment.

Records: Medical clearance records (confidential, maintained by PLHCP or Safety Officer), fit test records (worker name, date, respirator make/model/size, pass/fail, fit factor), training records (worker name, date, topics covered, trainer), respirator inventory/issuance log, cartridge change-out logs, program evaluation reports. Retention: Medical clearance: employment + 30 years. Fit test: employment + 2 years. Training: employment + 2 years.

See: Respiratory Protection Procedure (RP-001).

3.10 Heat and Cold Stress Management¶

3.10.1 Purpose and Scope¶

Work in thermal energy systems exposes workers to extreme temperatures that can cause heat-related illness or cold stress injuries.

Applies to: Work inside boilers/heaters/confined spaces with elevated temperatures, work in cold environments (outdoor winter work, cold storage facilities), work with hot surfaces/fluids (thermal oil 200-400°C), use of protective clothing increasing heat stress risk.

3.10.2 Heat and Cold Stress - Health Effects¶

Condition	Symptoms	Treatment
HEAT RASH	Skin irritation from excessive sweating, red bumps/blisters, itching	Cool area, keep dry, loose clothing
HEAT CRAMPS	Muscle cramps (legs, arms, abdomen) from electrolyte loss, heavy sweating, fatigue	Move to cool area, drink electrolyte solution, rest
HEAT EXHAUSTION	Heavy sweating, weakness, dizziness, nausea, headache, pale skin, rapid pulse	Move to cool area, loosen clothing, drink cool water, wet skin with cool water. Seek medical attention - can progress to heat stroke
HEAT STROKE	High body temperature (>40°C), confusion, loss of consciousness, hot dry skin OR profuse sweating, rapid pulse, seizures	CALL 911 IMMEDIATELY, move to cool area, cool body with water/ice, do not give fluids if unconscious. Can be fatal
HYPOTHERMIA	Shivering, confusion, slurred speech, drowsiness, loss of coordination, body temperature <35°C	Move to warm area, remove wet clothing, warm gradually (blankets, warm drinks), seek medical attention. Severe (no shivering, unconscious): CALL 911, warm carefully (do not rub or use direct heat)
FROSTBITE	Numbness, tingling, pale/waxy skin, hard/frozen tissue (fingers, toes, ears, nose)	Move to warm area, immerse in warm (not hot) water 40-42°C, do not rub/massage, seek medical attention. Do not rewarm if possibility of refreezing (causes more damage)

Risk Factors - Heat: High air temperature/humidity (inside boilers, summer outdoor work), radiant heat sources (hot surfaces, flames, sunlight), physical exertion (heavy work increases metabolic heat production), protective clothing (coveralls, respirators reduce body's ability to cool), lack of acclimatization, dehydration, age/fitness level/medications/health conditions.

Risk Factors - Cold: Low air temperature/wind chill, wet clothing or skin (water conducts heat away), contact with cold surfaces (metal, frozen ground), inadequate clothing/protective equipment, fatigue/dehydration/poor nutrition, underlying health conditions/medications.

3.10.3 Temperature Stress Controls¶

Engineering Controls: Heat: ventilation (increase air movement, exhaust hot air, supply cool air), reflective barriers/shielding (block radiant heat from hot surfaces), cooling systems (fans, air conditioning, spot coolers), cool water supply (drinking water, cooling stations). Cold: heated work areas (shelters, enclosures, heated vehicles), wind barriers (tarps, walls, fencing), insulated floors/mats (prevent heat loss through feet), warm water supply (drinking, handwashing).

Administrative Controls: Heat: work during cooler parts of day (early morning, late afternoon) when possible, acclimatization period (gradually increase work duration in heat over 5-7 days), work/rest schedules (limit continuous work time, mandatory rest breaks in cool area), buddy system (workers watch each other for signs), rotate workers (limit individual exposure duration), reduce work rate (slower pace reduces metabolic heat). Cold: limit exposure duration (shorter work periods in extreme cold), warm-up breaks (mandatory breaks in heated area), buddy system, schedule work during warmer parts of day when possible, provide hot drinks and warm meals.

Work/Rest Schedule Guidelines: High Heat: WBGT (Wet Bulb Globe Temperature) >30°C, moderate work: 50% work / 50% rest each hour. WBGT >32°C, moderate work: 25% work / 75% rest. WBGT >30°C, heavy work: 25% work / 75% rest. Adjust based on worker response. Extreme Cold: Temperature <-20°C with wind: Limit continuous outdoor work to 30 minutes, 10-minute warm-up break in heated shelter. Temperature <-30°C: Limit outdoor work to 15 minutes, 15-minute warm-up break. Adjust based on wind chill, worker response, physical activity level.

Personal Measures: Heat: Hydration (drink water frequently - 1 cup every 15-20 minutes during heat exposure, do not wait until thirsty), clothing (light-colored, loose-fitting, breathable when possible - balance with need for FR clothing), cooling garments (cooling vests, neck wraps, bandanas soaked in cool water), rest breaks (take breaks in cool, shaded area, remove PPE during breaks), monitor symptoms (be alert for signs in self/coworkers). Acclimatization: new workers or workers returning after absence (>1 week) - gradual increase. Day 1: 50% of normal work duration. Day 2-3: 60-70%. Day 4-5: 80-90%. Day 6+: full work duration (continue to monitor).

Cold: Layered clothing (base layer - moisture-wicking, insulation layer - fleece/wool, outer layer - wind/waterproof), head protection (insulated hat or balaclava - large heat loss through head), hand protection (insulated gloves, mittens - warmer than gloves, keep dry), foot protection (insulated boots, moisture-wicking socks, change wet socks), face protection (balaclava, face mask, goggles - prevent frostbite on exposed skin), keep dry (change wet clothing immediately - wet clothing loses insulating value), stay active (movement generates body heat but avoid sweating - wet skin loses heat), hydration (drink warm fluids regularly - dehydration increases cold stress risk), nutrition (eat regular meals and snacks - body needs calories to generate heat).

3.10.4 Monitoring, Emergency Response, Training, and Documentation¶

Monitoring: Supervisors must: monitor weather conditions (temperature, humidity, wind chill), observe workers for signs of heat or cold stress, enforce work/rest schedules, provide access to cool or warm areas for breaks, ensure adequate water or warm fluids available, modify work plans when extreme conditions present. Workers must: monitor themselves and coworkers for symptoms, report symptoms immediately (do not "tough it out"), take breaks as scheduled (do not skip breaks), hydrate regularly (water for heat, warm fluids for cold), adjust clothing layers as needed.

Emergency Response: Heat stroke or severe hypothermia: call 911, begin first aid immediately. Heat exhaustion or mild hypothermia: move to cool/warm area, provide fluids, monitor, seek medical attention if not improving. Frostbite: rewarm gradually, seek medical attention (do not rewarm if risk of refreezing).

Training - All Workers: Recognition of heat and cold stress symptoms (in self and others), risk factors and prevention measures, work/rest schedules and why important, proper clothing and hydration, first aid and emergency response, importance of buddy system and reporting symptoms.

Records: Training records, incident reports (heat or cold stress illness), weather monitoring logs (when working in extreme conditions).

See: Heat and Cold Stress Procedure (HC-001).

3.11 Hearing Conservation Program¶

3.11.1 Purpose and Scope¶

Noise exposure from equipment operation, grinding, compressed air use can cause permanent hearing loss.

Applies to: Work in areas with noise levels ≥85 dBA (8-hour TWA), use of loud equipment (grinders, air tools, impact wrenches, compressed air), work inside boilers/confined spaces with echoing/amplified sound.

3.11.2 Health Effects and Regulatory Requirements¶

Noise-Induced Hearing Loss (NIHL): Permanent damage to inner ear (cochlea) from excessive noise exposure, progressive and irreversible (cannot be corrected with surgery or hearing aids), gradual onset (years of exposure) OR sudden (single loud noise, explosion), may also cause tinnitus (ringing in ears).

Non-Auditory Effects: Increased stress, fatigue, difficulty concentrating, communication difficulties (cannot hear warnings or instructions), increased accident risk.

Regulatory: WorkSafe BC OHS Regulation, Part 7 (Noise, Vibration, Radiation, and Temperature). WorkSafe BC OELs: 85 dBA (8-hour TWA) - Action Level (hearing conservation program required), 90 dBA (8-hour TWA) - Permissible Exposure Limit (must reduce below this level).

3.11.3 Noise Exposure and Controls¶

Noise Levels in 4Core Work: Grinders, cut-off saws: 95-105 dBA. Air tools (impact wrench, air hammer): 95-110 dBA. Compressed air blow-off: 95-105 dBA. Inside boilers/confined spaces with equipment running: 90-100+ dBA (sound echoes and amplifies). General work areas (client facilities): variable, 75-95 dBA depending on equipment operating.

Noise Monitoring: Area monitoring (sound level meter) to identify high-noise areas, personal monitoring (dosimeter worn by worker) to measure individual exposure, conducted when new equipment introduced or work conditions change, annual monitoring if exposures near or above 85 dBA.

Controls: Engineering: use quieter equipment (electric tools instead of pneumatic when possible), maintain equipment (worn bearings, loose parts increase noise), isolate noise sources (barriers, enclosures), use sound-absorbing materials in confined spaces (where feasible). Administrative: limit time in high-noise areas (reduce exposure duration), rotate workers (share noise exposure), schedule noisy work when fewer workers present. Hearing Protection (PPE): required when noise exposure ≥85 dBA, provided at no cost, selection based on noise level and worker preference (comfort = more likely to wear).

3.11.4 Hearing Protection Devices¶

Type	NRR	Pros	Cons
Foam Earplugs (Disposable)	29-33 dB	Inexpensive, comfortable, compatible with most PPE	Requires proper insertion (training needed), single-use
Reusable Earplugs (Pre-molded)	24-30 dB	Reusable (washable), easier insertion than foam	Must fit properly (multiple sizes available)
Custom-Molded Earplugs	25-30 dB	Excellent fit and comfort, long-lasting	More expensive, requires professional fitting
Earmuffs	22-33 dB	Easy to put on and remove, adjustable, visible (supervisors can see worn)	Bulky, may interfere with other PPE (hard hat, safety glasses), uncomfortable in hot weather

Dual Protection (Earplugs + Earmuffs): Required when noise levels >105 dBA. Provides additional protection (NRR does not simply add - use calculation per WorkSafe BC).

Note on NRR: Noise Reduction Rating is laboratory-tested value. Real-world protection is lower. WorkSafe BC de-rating: Subtract 7 dB from manufacturer's NRR, then subtract that value from noise exposure. Example: 95 dBA noise level, earplug with NRR 30 → (30 - 7) = 23 dB reduction → 95 - 23 = 72 dBA actual exposure.

Requirements: Hearing protection REQUIRED: noise exposure ≥85 dBA (8-hour TWA), any time grinding/using air tools/compressed air blow-off, inside confined spaces with equipment operating, any area posted with "Hearing Protection Required" signage. Proper use: insert/position correctly (earplugs must be fully inserted, earmuffs must seal around ears), wear continuously during noise exposure (even brief removal reduces effectiveness significantly), inspect before use (earmuff cushions intact, earplugs clean and pliable), replace worn or damaged, clean reusable earplugs or earmuffs regularly. Maintenance: Earplugs (disposable foam discarded after each use, reusable washed with soap and water), earmuffs (wipe cushions with disinfectant, replace cushions when worn or torn, store in case when not in use).

3.11.5 Audiometric Testing, Training, and Documentation¶

Baseline Audiogram: Hearing test conducted before beginning noise-exposed work, establishes worker's normal hearing threshold, identifies pre-existing hearing loss.

Annual Audiogram: Repeat hearing test annually for workers with noise exposure ≥85 dBA, compares to baseline to detect changes in hearing (Standard Threshold Shift - STS).

If Hearing Loss Detected (STS): Notify worker of test results, re-fit hearing protection (ensure proper fit and adequate NRR), increase use of engineering/administrative controls if feasible, medical referral if significant hearing loss (rule out medical causes).

Audiometric Testing: Conducted by qualified audiometric technician or occupational health clinic, worker must avoid loud noise exposure for 14 hours before test (allows ears to recover), confidential (results provided to worker and retained by employer).

Training - All Workers in Noise-Exposed Areas: Health effects of noise exposure (hearing loss, tinnitus), noise sources and exposure levels in their work, purpose of hearing conservation program, types of hearing protection available and how to use properly, importance of audiometric testing, how to report hearing protection problems or hearing changes. Frequency: initial before noise exposure, annual refresher.

Records: Noise monitoring results (area and personal dosimetry), audiometric test results (baseline and annual - confidential), hearing protection issuance records, training records. Retention: Noise exposure: employment + 2 years. Audiometric test results: employment + 30 years (medical records). Training: employment + 2 years.

See: Hearing Conservation Procedure (HC-002).

End of Chapter 3, Part 2¶

Summary - Part 2 Covered:

3.6 Silica Exposure Control Plan (Refractory work)
3.7 Asbestos Recognition and Management (Bob's expertise, stop-work protocols)
3.9 Respiratory Protection Program (Comprehensive - links to confined space, silica, welding)
3.10 Heat and Cold Stress (Boiler work, winter outdoor work)
3.11 Hearing Conservation (Grinders, air tools, confined space noise)

Document Control

Field	Value
Version	0.9-DRAFT
Effective Date	December 2025
Next Review	December 2026
Approved By	[All 4 Owners]
Safety Officer	Rodney Peters

Company Information: - Business Name: 4Core Energy & Maintenance Ltd. - Address: [To Be Added] - Industry: Energy and mechanical system maintenance, retrofits and troubleshooting - WorkSafe BC Account: [Account Number]