“New Diesel Particulate Matter Exposure Limit Now in Effect for BC Mines: What You Need to Know”5/18/2025  Effective May 1, 2025, British Columbia’s mines must comply with a new exposure limit for Diesel Particulate Matter (DPM), measured as Elemental Carbon. The updated limit is now set at 100 µg/m³ over a 10-hour work shift. This change marks a significant regulatory milestone under the Health, Safety and Reclamation Code for Mines in British Columbia (2024). At Western Health & Safety (WHS), we’re helping our clients understand what this means, how it impacts underground operations, and what immediate steps can be taken to ensure compliance and protect worker health. What has changed?The new Maximum Allowable Exposure (MAE) for Diesel Particulate Matter is now:
Why it mattersDPM is a known occupational carcinogen and is linked to respiratory and cardiovascular conditions, particularly among underground workers operating or working near diesel-powered equipment. Exceeding this limit:
What the Code RequiresUnder Part 2 – Occupational Health of the Code:
How WHS Can HelpWHS supports mining clients across BC in aligning with the new DPM standard by offering:
📞 Phone: 403.241.6889 📧 Email: [email protected] WHS – Western Health & Safety Protecting Workers. Supporting Compliance. Advancing Health in Mining.
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 Indoor carbon dioxide (CO₂) levels have long been used as a shorthand for indoor air quality (IAQ) and ventilation performance—but new guidance from ASHRAE (approved February 12, 2025) offers a more nuanced take. If you’re an HVAC professional, building designer, or facilities manager, this update could reshape how you monitor and manage indoor environments. In this post, we’ll unpack what ASHRAE’s updated position means, why it matters, and how you can align with best practices going forward. Why This Update MattersASHRAE has officially clarified that CO₂ is not a reliable, all-purpose indicator of indoor air quality. That’s a major shift in perception for many professionals and organizations that have relied on CO₂ levels as a go-to metric. Here’s what’s changing:
The Misconception: CO₂ = IAQ?Historically, CO₂ levels have been used to infer whether a room is "stuffy" or under-ventilated. But ASHRAE’s 2025 position document emphasizes this can be dangerously simplistic. While rising CO₂ concentrations may correlate with increasing levels of other indoor pollutants (because they all rise in poorly ventilated spaces), CO₂ is not the pollutant to worry about. In fact:
What ASHRAE Now RecommendsASHRAE's revised position includes several critical recommendations for research and practice: 1. Use CO₂ Only as a Supplemental Tool - CO₂ can still help assess outdoor air ventilation rates—but only if applied correctly, with validated assumptions and proper sensor placement. 2. Avoid Over-Reliance on CO₂ for Infection Control - CO₂ is often promoted as a proxy for airborne virus risk, but its relationship to disease transmission is complex and indirect. Infection risk also depends on occupancy patterns, space types, filtration systems, and more. 3. Do Not Use CO₂ to Justify Air Cleaning Alone - Technologies that remove only CO₂ may interfere with ventilation controls and give a false sense of safety about indoor air quality. Best Practices for Building ProfessionalsIf you work in HVAC, construction, education, healthcare, or real estate, here’s how to adapt:
A Future with Rising Outdoor CO₂As outdoor CO₂ levels continue to rise due to global climate change, indoor readings will shift as well. This reality makes it more important than ever to distinguish between indoor-generated CO₂ and ambient levels, especially when fine-tuning ventilation systems. Final ThoughtsASHRAE’s new position on indoor CO₂ is a call for smarter, more holistic air quality management. By understanding the limitations of CO₂ as an IAQ metric—and by investing in comprehensive, evidence-based monitoring—you can make better decisions for occupant health, safety, and performance.
If your business operates in construction, manufacturing, agriculture, oil & gas, or chemical processing, it’s time to review workplace air quality and hazard assessments to ensure compliance with the new standards. What Are Occupational Exposure Limits (OELs)?Occupational Exposure Limits (OELs) define the maximum airborne concentration of hazardous chemicals that workers can be exposed to without adverse health effects. These limits help prevent long-term health risks and ensure workplace safety. Types of Exposure Limits:
Here is a link to the WorkSafeBC E-Limits 2025 WorkSafeBC Exposure Limit Updates: Chemicals AffectedThe latest WorkSafeBC updates include revised exposure limits for several industrial chemicals, solvents, and herbicides. Employers must take note of these changes to avoid regulatory penalties and protect worker health. 🧪 Diacetone Alcohol
WorkSafeBC Compliance: What Employers Must DoWith these new occupational exposure limits (OELs) in effect, employers must take immediate action to ensure compliance and protect workers from hazardous exposure. ✅ Steps to Stay Compliant:✔️ Conduct Workplace Air Quality Testing: Measure airborne chemical levels to ensure compliance. ✔️ Review Hazard Assessments: Identify areas with high-risk chemical exposure. ✔️ Implement Exposure Control Measures: Improve ventilation, provide PPE, and update safety protocols. ✔️ Train Employees: Educate workers on exposure risks, protective equipment, and emergency procedures. Failure to comply with these new regulations may result in penalties, legal consequences, and increased health risks for employees. Need Help Navigating These Changes?At WHS, we specialize in occupational hygiene assessments, air monitoring, and exposure control solutions. Our team stays up to date with WorkSafeBC regulations and ACGIH exposure limits to help businesses stay compliant and protect their workforce.
📞 Contact us today to schedule a consultation or workplace air quality assessment.  Air Sampling for Benzene The recent reduction of the ACGIH Threshold Limit Value (TLV) for benzene from 0.5 ppm to 0.02 ppm is a significant step forward in worker health and safety. This change particularly impacts federally regulated pipeline companies and oil and gas operations in Calgary and across British Columbia, where WorkSafeBC is in the process of adopting the revised TLV. As a certified industrial hygienist with over 20 years of experience, I have conducted extensive air sampling for benzene exposure in workplaces. The findings from recent sampling campaigns highlight the challenges employers face in meeting the updated benzene TLV and ensuring worker protection. Key Findings on Benzene Exposure
What Does This Mean for Employers in Calgary and Beyond?
The Role of Industrial Hygiene in Addressing Benzene ExposureAs an experienced industrial hygienist, I have a deep understanding of the complexities involved in monitoring and mitigating benzene exposure. My fieldwork in Calgary and BC has shown that proactive measures are essential to meet evolving safety standards. Employers should:
Taking ActionThe reduction in the benzene TLV highlights the critical need for updated monitoring practices and a renewed focus on worker safety. Employers in Calgary and BC must address these challenges head-on to ensure compliance and protect their workforce.
If you’re navigating the complexities of the revised TLV for benzene, I’m here to help. Let’s discuss how advanced air sampling strategies and expert guidance can ensure your workplace is safe and compliant.  Asbestos containing materials in my house When it comes to asbestos abatement, cutting corners can lead to disastrous consequences—both financially and emotionally. Unfortunately, many homeowners and businesses learn this the hard way when they hire unqualified contractors who fail to follow industry standards. At Western Health & Safety, we’ve seen firsthand how improper asbestos removal can spiral into a costly and stressful ordeal. In one such case, a family was forced to leave their home for three months, battling with their insurance company while enduring over $200,000 in abatement and surface sampling costs. The root cause? An abatement company that used untrained workers, skipped critical air sampling, and performed their own final inspections without involving a third-party consultant. This cautionary tale underscores the importance of hiring certified professionals and adhering to best practices in asbestos management. The Risks of Unqualified Asbestos ContractorsAsbestos abatement is a highly regulated process for a reason. When asbestos-containing materials (ACMs) are disturbed, they release microscopic fibers into the air that can cause serious health issues, including lung cancer, asbestosis, and mesothelioma. Proper containment, removal, and air sampling are essential to ensure that these fibers do not pose a risk to the occupants of the building. In this particular case, the abatement company failed on multiple fronts:
The Financial and Emotional TollThe consequences of these missteps were severe. The homeowners were displaced for three months, unable to return to their home while the situation was resolved. During this time, they faced a drawn-out battle with their insurance company, which was reluctant to cover the extensive costs of the abatement and surface sampling. In the end, over $200,000 was spent on remediation efforts before the family was finally allowed to move back in. This case highlights not only the financial burden of improper asbestos abatement but also the emotional toll it can take on homeowners. Being displaced from your home, especially for an extended period, is a stressful and disruptive experience. Add to that the uncertainty of whether your home is truly safe, and it becomes clear why proper oversight and professional standards are so critical. The Importance of Professional OversightAt Western Health & Safety, we believe that every asbestos abatement project should be conducted with the highest level of professionalism and care. This means:
Conclusion: Don’t Cut Corners on Asbestos AbatementAsbestos abatement is not an area where you can afford to cut corners. The risks are too high, both in terms of health and financial costs. At Western Health & Safety, we are committed to providing expert asbestos management services that prioritize safety, compliance, and peace of mind. Our team of certified professionals follows industry-leading protocols to ensure that every project is completed safely and efficiently.
If you’re facing an asbestos issue in your home or workplace, don’t leave it to chance. Contact Western Health & Safety today for a consultation and let us help you navigate the complexities of asbestos abatement with confidence.  Welding operations, particularly Flux Core Arc Welding (FCAW), can expose workers to hazardous substances, including manganese, a metal commonly found in welding fumes. Prolonged exposure to manganese can lead to serious health issues, including neurological disorders such as manganism, which affects motor skills and cognitive function. A comprehensive statistical analysis was conducted to assess manganese exposure among workers involved in welding, brazing, grinding, and gouging. This analysis is crucial in applying the ALARA (As Low As Reasonably Achievable) principle to minimize exposure to manganese and protect worker health. In this blog post, we will explore the findings from our recent project, focusing on the variability in manganese exposure across different worker groups and the importance of tailored control measures to reduce exposure. Manganese Exposure: A Statistical OverviewA total of 32 samples were collected and analyzed to determine the concentration of manganese in the air. The results revealed significant variability in exposure levels across different worker groups, underscoring the need for customized control strategies. All Samples
Exposure by Worker GroupBoilermakers
Millwrights
Fire Watches - in Confined Spaces
Confined Space Stand By Workers
Implementing the ALARA PrincipleThe findings from the project underscore the necessity of adhering to the ALARA (As Low As Reasonably Achievable) principle when managing manganese exposure in welding operations. The variability in exposure levels across different worker groups highlights the importance of implementing a comprehensive set of control measures, including:
Continuous Monitoring and AssessmentThe variability in manganese exposure levels across different worker groups at the project highlights the importance of continuous monitoring and assessment. Regular air sampling and exposure assessments are essential to ensure that control measures remain effective and that workers are adequately protected from hazardous substances like manganese. At Western Health & Safety (WHS), we specialize in conducting comprehensive welding fume exposure assessments, including monitoring for manganese and other hazardous substances. Our team of Certified Industrial Hygienists works closely with clients to develop tailored solutions that meet the specific needs of their workplace, ensuring compliance with safety regulations and protecting worker health. ConclusionManganese exposure during welding, particularly in Flux Core Arc Welding (FCAW), poses significant health risks to workers. The findings from the project demonstrate the variability in exposure levels across different worker groups, emphasizing the need for tailored control measures and adherence to the ALARA principle. By implementing a combination of engineering controls, administrative controls, and PPE, employers can effectively manage and minimize workers' exposure to manganese, ensuring a safer and healthier workplace.
If you are concerned about manganese exposure in your workplace, contact Western Health & Safety today for a comprehensive welding fume exposure assessment. Our team of experts is here to help you protect your workforce and ensure compliance with occupational health standards. In today’s world, creating safe, healthy, and sustainable buildings is more important than ever. Whether you're a building owner, facility manager, or an industrial hygienist, understanding the various building standards available can help you make informed decisions that benefit both occupants and the environment. Four key frameworks that guide building design and operation are WELL, LEED, ASHRAE, and the Alberta Infrastructure Guidelines. Each of these standards has a unique focus and offers distinct benefits. Let’s explore the differences and advantages of each. WELL Building StandardThe WELL Building Standard is a performance-based system that focuses on the health and well-being of building occupants. It is designed to enhance human health through building design, operation, and behavior. Key Focus Areas:
LEED (Leadership in Energy and Environmental Design)LEED is one of the most widely recognized green building certification systems in the world. It focuses on sustainability across various aspects of building design, construction, and operation. Key Focus Areas:
ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers)ASHRAE provides technical standards and guidelines primarily focused on HVAC (heating, ventilation, and air conditioning) systems and energy efficiency. ASHRAE standards are widely adopted in building codes and are essential for ensuring safe and efficient building operations. Key Standards:
Alberta Infrastructure GuidelinesThe Alberta Infrastructure Guidelines are specific to government-owned and supported infrastructure in Alberta, Canada. These guidelines ensure that public buildings meet safety, functionality, and sustainability requirements. Key Focus Areas:
Comparing the StandardsWhile all four frameworks aim to improve building performance, they each have a unique focus:
Which Standard is Right for Your Building?Choosing the right standard depends on your project’s goals:
ConclusionsEach of these standards--WELL, LEED, ASHRAE, and the Alberta Infrastructure Guidelines—offers unique benefits that can enhance building design, operation, and occupant well-being. By understanding their differences, you can select the most appropriate framework for your project, ensuring that your building meets its specific goals for health, sustainability, and performance.
Whether you’re looking to improve indoor air quality, reduce energy consumption, or create a healthier environment for occupants, these standards provide the tools and guidance needed to achieve success.  In the aftermath of a fire, many property owners face overwhelming damage to their buildings and possessions. However, the visible destruction is only part of the problem. Hidden dangers, such as soot, ash, and other combustion by-products, can linger long after the flames have been extinguished, posing serious risks to both property and human health. This is where professional smoke and fire damage assessments become essential. At Western Health & Safety (WHS), we specialize in providing comprehensive smoke and fire damage assessment services, with a strong emphasis on industrial hygiene. Our team, led by certified industrial hygienists, is dedicated to ensuring the safety of your property and the well-being of its occupants by using the latest testing methods and technologies to uncover the full extent of fire-related damage, including harmful substances like asbestos, lead, and mercury. Why Are Smoke and Fire Damage Assessments Necessary?Fire doesn’t just destroy—its aftermath can leave behind harmful particulates, including soot, char, and ash, that can contaminate air, surfaces, and even HVAC systems. Additionally, fires can disturb hazardous materials like asbestos and release dangerous heavy metals such as lead and mercury into the environment. If these materials are not properly identified and remediated, they can lead to long-term health issues, including respiratory problems, neurological damage, and other serious conditions. Furthermore, lingering contaminants can accelerate the corrosion of building materials, leading to structural weaknesses over time. What WHS Provides: Comprehensive Damage AssessmentsOur smoke and fire damage services are designed to go beyond the visible surface. Here's how we help:
The WHS Difference: Expertise in Industrial HygieneWith years of experience in Alberta and BC, WHS stands out by offering personalized, field-driven solutions that larger multidisciplinary firms may overlook. Our team of certified industrial hygienists brings extensive expertise in industrial hygiene, specializing in the detection and control of hazardous materials such as asbestos, lead, and mercury. Our hands-on approach and boutique services mean we are fully dedicated to identifying and addressing even the most complex fire damage scenarios. We stay up-to-date with the latest methodologies and technologies, ensuring that our clients receive accurate and timely assessments. Protecting Your Property, Protecting Your HealthAt WHS, our mission is to safeguard both property and public health by reducing exposure to toxic substances resulting from fires. Our smoke and fire damage assessments are designed to help property owners, facility managers, and contractors understand the full impact of fire damage, including the disturbance of hazardous materials like asbestos, lead, and mercury. By taking proactive steps to restore safety and health to the affected areas, we ensure that your property is not only restored but also made safe for future use.
Don’t let hidden fire damage and hazardous materials affect the safety of your home or business. Contact WHS today to schedule a professional fire damage assessment, and let us help you ensure your property is safe, clean, and secure.  At Western Health & Safety, we prioritize the well-being of workers across various industries by providing top-notch occupational hygiene services. One critical aspect of our services is the accurate assessment of noise exposure, which is vital for protecting workers' hearing and overall health. In this blog post, we'll walk you through our comprehensive Noise Dosimetry Standard Operating Procedure (SOP), detailing how we conduct noise assessments to ensure compliance with safety standards and regulations. NOISE DOSIMTERY PROTOCOLSThe primary goal of our Noise Dosimetry Protocols is to outline a clear and consistent method for measuring workers' exposure to noise levels. By adhering to this Protocol, we can provide reliable data that informs our clients' decisions on managing noise risks in the workplace. This SOP applies to all noise dosimetry activities we conduct, covering both individual and group assessments, including the determination of Similar Exposure Groups (SEGs). WHS Sampling protocol is compliant with the CSA Z107.56-18 - Measurement of noise exposure, and NIOSH Guide to Occupational Exposure Sampling (Leidel et al., 1977). Similar Exposure Groups (SEGs)SEGs are essential in noise exposure assessment, as they group workers who have similar noise exposure levels due to comparable tasks, work areas, and equipment usage. To accurately determine SEGs, we consider several factors:
Sampling StrategyTo ensure accurate measurements, we use calibrated sound level meters and dosimeters. Our sampling strategy involves determining the appropriate number of samples based on group size. For instance:
ENSURING PRECISION AND ACCURACYOur data analysis process follows a precise measurement procedure:
We combine individual Leq measurements to determine the group's exposure level, using the following formula:  COMPRESHENSIVE REPORTINGOur reports include all mandatory elements, such as compliance statements, measurement dates, worker details, and equipment used. Optional elements like product characteristics and extraneous noise sources are also documented. This thorough reporting ensures that our clients have all the necessary information to understand and manage noise exposure risks effectively. We uphold rigorous quality control and assurance standards, ensuring consistency in measurement procedures and data accuracy. Any deviations from the standard procedure are documented and justified. STAYING CURRENT WITH STANDRARDSWe align our SOP with industry standards, including the CSA Z107.56-18 - Measurement of noise exposure and the NIOSH Guide to Occupational Exposure Sampling. Our SOP is reviewed annually or whenever significant changes occur in work processes or regulations. CONCLUSIONSAt Western Health & Safety, our commitment to excellence extends to every project we undertake. By following our detailed Noise Dosimetry SOP, we ensure that all noise exposure assessments are accurate, reliable, and compliant with the latest standards. This dedication helps us protect workers' health and safety, fostering safer and healthier workplaces across all industries.
Workplace safety is paramount in ensuring the health and well-being of employees and the efficiency of operations. In Calgary, a city known for its diverse industries including oil and gas, construction, and manufacturing, enhancing workplace safety is crucial. Integrating Industrial Hygiene (IH) with Human and Organizational Performance (HOP) offers a comprehensive approach to improving safety outcomes. UNDERSTANDING INDUSTRIAL HYGIENEIndustrial Hygiene focuses on identifying, evaluating, and controlling environmental factors that may cause illness, injury, or discomfort in the workplace. Key aspects include:
Exploring Human and Organizational Performance (HOP)HOP is a systems-based approach to safety that emphasizes understanding human behavior and organizational factors that influence performance. Core principles of HOP include:
Integrating IH with HOPCombining IH with HOP creates a robust safety framework that addresses both environmental hazards and human factors. Key integration strategies include:
CASE STUDY: IMPLEMENTING IH & HOP IN CALGARY OIL & GAS INDUSTRYScenario: A Calgary-based oil and gas company aimed to reduce incidents of chemical exposure and improve overall safety culture. Approach:
The integration of IH and HOP led to a significant reduction in chemical exposure incidents and fostered a culture of safety and continuous improvement. CONCLUSIONS:Integrating Industrial Hygiene with Human and Organizational Performance provides a comprehensive approach to workplace safety in Calgary. By addressing both environmental hazards and human factors, organizations can create safer work environments, reduce incidents, and promote a culture of continuous learning and improvement. This holistic approach not only protects employees but also enhances overall operational efficiency and productivity.
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