Process Safety with Trish & Traci

On a sunny summer day in 2007 near Wichita, Kansas, a tanker truck was offloading naphthalene into a stainless-steel tank at a solvent tank farm when the container spontaneously ignited, catching fire and exploding, shooting projectiles in the air. This led to the evacuation of thousands in a nearby community. While there were no casualties, the explosion destroyed the entire storage facility, luckily not causing any injuries or fatalities in the nearby community.  An investigation determined that electrostatic charge buildup had caused a spark that ignited a solvent-air mixer in the vapor space in the vessel receiving naphtha from the tanker truck. In this episode, Traci Purdum, CP's editor-in-chief, reads an article from authors Tom Patnaik and Christian Stentzel -- both of Thaletec. The article was published May 21, 2025.

Risk assessment should still be a manual process, but AI can streamline data collection to enable sound engineering judgments. In this episode,  Trish and Traci welcome guest Dheerajkumar Narang, whose research examines how AI and machine learning can enhance process safety compliance. Traditional compliance methods are time-consuming and fragmented across different systems, while AI can automate data collection, identify leading indicators and predict compliance outcomes. Key challenges include system integration with legacy infrastructure and maintaining domain expertise for regulatory updates. AI should streamline processes to allow operators to focus on critical tasks.

In this episode, Trish and Traci discuss the catastrophic failure at Queensland's Callide Power Station C4 on May 25, 2021, which caused power outages for 470,000 people.  During a routine switching operation to replace DC battery systems, a voltage drop was misinterpreted as an AC fault, triggering a cascading failure. Both AC and DC systems failed, leaving the turbine without lubrication while it continued spinning backwards at 3,000 RPM. The incident demonstrates that process safety principles apply beyond traditional chemical plants to any high-hazard environment. Key lessons include proper hazard identification, functioning safety controls, and maintaining culture, leadership, accountability and governance in safety management.

This In Case You Missed It episode brings the written word to life. Today, Trish Kerin, the director of Lead Like Kerin, and Stay Safe columnist for Chemical Processing, will read her column “Wield Questions to Learn and Teach”  “Curiosity killed the cat, but satisfaction brought him back.” – A proverb made modern by Eugene O'Neill. Have you ever asked a question at work and were surprised by the answer? Over the course of my career, this has happened many times. Sometimes, the answer was genuinely new to me. Other times, I was surprised that someone thought the answer they provided was legitimate. In both cases, I learned something.  Written By: Trish Kerin Read By: Trish Kerin  Read Article HERE 

Remembering the human toll of Texas City and Deepwater Horizon and applying those lessons learned can prevent similar tragedies. In this episode, Trish and Traci discuss two major BP incidents: the 2005 Texas City Refinery explosion that killed 15 workers when an overfilled tower created a geyser of hot raffinate that ignited, and the 2010 Deepwater Horizon explosion that killed 11 workers and caused the largest U.S. marine oil spill when cement failed to properly seal a well. Key factors included faulty equipment, misleading indicators, inappropriate safety messaging and failure to learn from near-misses. These tragedies led to industry-wide improvements, including standardized process safety metrics, occupied building risk assessments, and better hazard management.

Have you ever done a double-take when looking at an inspection photograph? I certainly did when an engineer at a valve manufacturer sent me an inspection photograph and asked, “See anything wrong with this picture?” “Yeah,” I replied. Someone had installed two expansion relief valves back-to-back on the body bleed of a twin-seated plug valve used for isolation in our gasoline tank farm. The valve casting safety port was cracked because expansion flow was choked. “Dumb, really dumb,” I remarked. How did this get by?

In this podcast, Trish and Traci discuss the importance of storytelling in process safety. Trish shares two influential stories from her career and personal life. She outlines effective storytelling using the "four Cs": context, conflict, conclusion, and call to action. She emphasizes starting with a memorable moment to engage audiences, matching tone to content gravity, and personalizing stories.

Welcome to the In Case You Missed It edition of Process Safety with Trish and Traci -- the podcast that aims to share insights from past incidents to help avoid future events.  This In Case You Missed It episode brings the written word to life. Today, Trish Kerin, the director of Lead Like Kerin and Stay Safe columnist for Chemical Processing will read her column “An Engineer's Process Safety Evolution.” 

A former Formula One engineer has developed an AI copilot that can suggest questions, reference incident databases and provide support. But don't worry,  humans still have the last word.

Safety experts share strategies to revitalize job hazard analysis programs. A piece of paper won't save your life, but what's on that paper could.   Trish and Traci, along with guest Valerie Stakes, discuss five steps to improve job hazard analysis (JHA) programs: honest program evaluation, form clarity, embedding JHAs in other documents, improved training and increasing visibility through collaboration.

We've extracted a few gems from the 2024 season of Process Safety with Trish & Traci. Listen in as we discuss recurring accidents, emergency systems and organizational learning.

This In Case You Missed It episode brings the written word to life. Today, Trish Kerin, Chemical Processing's Stay Safe columnist, will read her column “Process Safety Lessons from Bhopal 40 Years Later” Written By: Trish Kerin Read By: Trish Kerin  Read Article 

The Bhopal tragedy of 1984 at a Union Carbide pesticide plant in India killed thousands of people. The incident resulted from multiple safety failures: contaminated methyl isocyanate (MIC) storage, disabled safety systems and poor plant management. It led to significant changes in process safety, including the development of OSHA's Process Safety Management standard, the Center for Chemical Process Safety, and international safety directives like the Seveso protocol. Chemical engineer Ramin Abhari has created graphic novels to communicate the lessons learned, emphasizing the importance of inherently safer design, proper management of change and maintaining critical safety systems during plant decommissioning.

In this episode, Trish and Traci discuss the 1984 Mexico City LPG disaster in Mexico, where a pipe burst at a Pemex facility. This led to a massive explosion equivalent to five Hiroshima bombs. A combination of factors, including poor management of change, inadequate fireproofing and proximity to residential areas, resulted in 500 deaths. Key lessons included the importance of proper land use planning, risk assessment and fire protection.

Chemical Processing recently hosted a webinar on the importance of process safety during transient operations. Normal operations include continuous and batch processes, while abnormal situations involve plant upsets or deviations from typical parameters. Loss of control can lead to unscheduled shutdowns, and emergency situations may require immediate action. For all scenarios, proper instrumentation, risk assessment and decision-making are critical.   Trish Kerin, director of the IChemE Safety Centre and co-host of the Process Safety with Trish & Traci podcast series, served as the subject matter expert and emphasized that process safety revolves around leadership, focusing on knowledge, engineering, systems and human factors. 

Welcome to the In Case You Missed It edition of Process Safety with Trish and Traci -- the podcast that aims to share insights from past incidents to help avoid future events. I'm Traci Purdum, EIC of Chemical Processing. Please subscribe to this free podcast on your favorite platform to continue learning with Trish & me in this series. This In Case You Missed It episode brings the written word to life. Today, Trish Kerin, the director of IChemE Safety Centre, and Stay Safe columnist for Chemical Processing, will read her column “Knowledge Is Power – Or Is It?” "Knowledge is power" — a phrase commonly attributed to Francis Bacon's 1597 work Meditationes Sacrae — has endured for centuries, echoed by influential figures like Thomas Jefferson. However, this adage, while impactful, may only scratch the surface of a deeper truth. When it comes to process safety, we need people to understand a range of aspects, from the basis of design to the operating philosophy. In other words, we need them to have knowledge.  Written By: Trish Kerin Read By: Trish Kerin  Read Article HERE 

On the 35th anniversary of the deadly event we examine how routine maintenance can go horribly wrong.

Welcome to the In Case You Missed It edition of Process Safety with Trish and Traci -- the podcast that aims to share insights from past incidents to help avoid future events. I'm Traci Purdum, EIC of Chemical Processing. This In Case You Missed It episode brings the written word to life. Today, I will be reading a column by our editor at large Sean Ottewell “Safety Lessons from the Great Molasses Flood of 1919” -- Discover the catastrophic events of the Great Molasses Flood, where engineering failures led to a deadly wave of syrup in Boston's North End. Written By: Seán Ottewell, editor-at-large Read By: Traci Purdum, editor-in-chief  Read Article HERE https://www.chemicalprocessing.com/voices/ottewell/article/55055791/safety-lessons-from-the-great-molasses-flood-of-1919

In this episode of Process Safety with Trish and Traci we interview Fiona Erskine, an engineer and crime novelist who has a passion for process safety. Fiona discusses balancing her engineering career with writing and how she uses her novels to educate readers about process safety and engineering concepts. Her Dr. Jaq Silver series combines thrilling plots with accurate technical details, making complex topics accessible to non-experts.

Our tendency to underestimate the likelihood of rare occurrences can lead us to dismiss the possibility of process safety incidents. This In Case You Missed It episode brings the written word to life. Today, Trish Kerin, the director of IChemE Safety Centre and Stay Safe columnist for Chemical Processing, will read her column “It's Not Impossible That It's Possible” Written By: Trish Kerin Read By: Trish Kerin  Read Article HERE 

The standard's industry-agnostic approach, its potential to influence global PSM practices and its role in setting benchmarks for organizations not covered by traditional legislation will impact safety practices worldwide. In this episode, Trish & Traci discuss the Canadian Process Safety Management (PSM) standard CSA Z767, the world's first national PSM standard. Adrian Pierorazio and Parnian Jadidian — part of the team that crafted the standard — explain its development, starting as a guideline and evolving into a national standard to provide a unified framework for PSM across various industries in Canada. The standard was updated in 2024 to incorporate industry feedback and expand key sections.

The plant floor at the West Pharmaceuticals facility in Kingston, N.C., was kept spotless to meet hygiene requirements. However, combustible polyethylene dust accumulated in the suspended ceiling. This led to a dust explosion on January 29, 2003, that killed six workers, injured 38, and destroyed the plant. The U.S. Chemical Safety and Hazard Investigation Board (CSB) couldn't identify the ignition source. As I noted in a previous column, the CSB blames dust explosions for numerous fatalities at many plants. Let's get into how to identify the risks of dust fires and explosions. Written By: Dirk Willard Read By: Traci Purdum  Read Article HERE 

Control system failures, alarm floods, maintenance issues and emergency response factored into this non-deadly incident.

In this guest podcast episode from our sister publication Processing, Senior Editor Nate Todd interviews Chris Cloney of Dust Safety Science. In this episode, we discover that awareness of dust hazards varies globally, often spiking after major incidents but waning over time. The company tracks dust-related incidents annually, noting significant events like the 2023 grain silo explosion in Brazil. Common hazards involve grain, wood and metal dusts, with equipment like dust collectors and silos frequently implicated. Emerging industries like 3D printing and robotics present new challenges. Dust Safety Science emphasizes ongoing education and risk assessment to prevent future incidents.

The U.S. Chemical Safety Board identified five issues with the 2019 Philadelphia Energy Solutions Refinery fire and explosion: mechanical integrity, outdated equipment, lack of remote emergency isolation valves, safeguard reliability and the need for inherently safer design. https://www.chemicalprocessing.com/podcast/process-safety-with-trish-and-traci

Understanding the two kinds of change, deliberate and creeping, will aid you in keeping your facility a safe place to work. As we look back 50 years, we can see both deliberate and creeping change played significant roles in the catastrophic explosion and fire that tore through the Nypro plant in Flixborough, U.K., resulting in the tragic loss of 28 lives and leaving 89 others injured.

The Flixborough disaster in 1974 resulted in 28 fatalities and significant damage, leading to the introduction of management of change processes, improved asset integrity practices, emphasis on competency management, and enhanced control room safety measures. This landmark incident highlighted the importance of multidisciplinary collaboration and continues to serve as a lesson in process safety.

Time is critical when tracking down hazardous substances. Whether it's trying to mitigate safety incidents before they happen or being able to tap all the pertinent information during an emergency involving a chemical spill, fire or natural disaster, having an efficient way to trace every ingredient is paramount. This crossover episode first appeared in our Distilled podcast series. 

In this episode, Trish & Traci interview Stephen J. Wallace, a former investigator with the U.S. Chemical Safety Board and author of the book "Hazardous Lies." Wallace offers insights into the world of process safety investigations and the motivation behind his fictional thriller. Wallace draws from his real-life experiences to craft a realistic portrayal of the challenges faced by investigators, including companies' attempts to hide the truth, ethical dilemmas and the courage required to uncover the root causes of accidents.

The incident at Formosa Plastics in 2004 highlighted critical lessons in process safety. Human factors, communication gaps and inadequate equipment played significant roles in the death of five workers.

This In Case You Missed It episode of Process Safety with Trish & Traci brings the written word to life. Today, I will be reading an excerpt from a column written a few years ago by John Bresland, president of Process Safety Risk Assessment LLC and former chair of the United States Chemical Safety Board. The column  “10 Rules To Succeed at Process Safety Management." Written by: John Bresland Read by: Traci Purdum URL: https://www.chemicalprocessing.com/safety-security/fire-explosion-protection/article/11321430/10-rules-to-succeed-at-process-safety-management-chemical-processing

It's crucial to operate within our professional boundaries and effectively mitigate risks when operating beyond them. In this In Case You Missed It episode, Trish Kerin, director of the IChemE Safety Centre, reads her most recent column: Embrace Challenges, Recognize Limits, Manage Risks

In this episode, we offer 7 steps for better cybersecurity. If you are a process control engineer, an IT professional in a company with an automation division, or a business manager responsible for safety or security, you may be wondering how your organization can get moving on more robust cybersecurity practices. View the transcript for links to all the materials mentioned in this podcast. https://www.chemicalprocessing.com/process-safety-w-trish-traci/article/33038811/tipisodes-7-steps-to-better-cybersecurity

Boeing was known for its engineering excellence until a focus on profitability took over. Properly documenting management of change and recognizing weak signals could have prevented tragedy. In this episode of Process Safety with Trish & Traci, we discuss the aviation industry's Boeing 737 MAX crisis and how it revealed critical management failures, emphasizing the importance of rigorous management of change, prioritizing safety over profitability and identifying weak signals. The mishaps stemmed from design flaws and inadequate pilot training, highlighting the need for systemic improvements to prevent similar tragedies. Lessons extend to other industries, emphasizing proactive risk mitigation and a culture of safety.

A hazard and operability study (HAZOP) mostly is a safety design check, not a design development review. Making and finalizing major design choices should occur long before a HAZOP. In this In Case You Missed It Episode, Traci Purdum reads a column from Plant InSites columnist Andrew Sloley.   Written By: Andrew Sloley Read By: Traci Purdum  Read Article: https://www.chemicalprocessing.com/voices/plant-insites/article/21437737/use-hazops-properly

In today's episode, Trish and Traci discuss inherently safer design principles, emphasizing proactive safety measures. Trish shares examples, such as separating hazardous substances from work areas and minimizing potential risks through thoughtful design choices. They highlight challenges like maintaining design integrity throughout project phases and stress the importance of documenting safety rationale for future reference. The discussion extends to the intersection of inherently safer design with sustainability, emphasizing the need for ongoing vigilance and communication to ensure safer facilities and environments.

Daily experiences vary, but key events hold lessons. Reflection is vital for learning and shaping success.   Written By: Trish Kerin Read By: Trish Kerin  Read Article HERE https://www.chemicalprocessing.com/voices/stay-safe/article/33018718/the-difference-between-experiences-and-learning-in-process-safety

In their podcast, Trish and Traci discuss the importance of commemorating anniversaries of incidents, emphasizing the need to learn from the past. Trish highlights two reasons for reflection: learning from past events to prevent recurrence and honoring those who lost their lives. They delve into various historical incidents, such as the IChemE Safety Centre's 10th anniversary, the LNG explosion in Algeria, the Boston molasses spill, the flour dust explosion in Germany, the Valdez oil spill, Flixborough, the Phillips Petroleum incident in Texas, and the 40-year anniversary of the Bhopal disaster. The discussion underscores the ongoing relevance of these incidents and the importance of continuous learning in process safety.

Welcome to the crossover edition of Process Safety with Trish and Traci -- the podcast that aims to share insights from past incidents to help avoid future events. I'm Traci Purdum, EIC of Chemical Processing. Today's crossover is from our Chemical Processing Distilled podcast series. I recently spoke with Dave Strobhar, founder and principal human factors engineer for Beville Engineering. We discussed Unlocking Efficiency By Reducing Emergency Procedures. This conversation struck me as a perfect addition to the Trish & Traci series, so without further adieu, let's listen in.

In this episode, Trish and Traci, along with guest Melissa Humphries, discuss the challenges of intuitively understanding uncertainty and likelihoods in risk assessments. They highlight the common pitfalls of dismissing low-likelihood events and the impact of human nature on risk perception. Melissa explains statistical concepts like risk and uncertainty, emphasizing the importance of communicating findings effectively. They delve into the role of statistical methods in identifying influential factors affecting risk and stress the need for storytelling and stakeholder engagement in conveying complex statistical results.

This In Case You Missed It episode brings the written word to life. Today, Trish Kerin, the director of IChemE Safety Centre, and Stay Safe columnist for Chemical Processing, will read her column “Reflecting On Tragedy Can Improve Process Safety,” which appeared in the December 2023 edition of our magazine. Written By: Trish Kerin Read By: Trish Kerin  Read Article HERE 

In the podcast episode, Traci and Trish discuss the 31st anniversary of the La Mède Refinery explosion in France, detailing the events and the consequences, including six fatalities and significant financial loss. Trish emphasizes the importance of rigorous corrosion inspection programs and the need for comprehensive risk assessments in facility design. They explore legal implications, questioning the attribution of blame to specific individuals. The conversation shifts to the need for explosion-proof control rooms and considerations for retrofitting existing facilities. Traci raises the importance of space between units to prevent a domino effect during explosions, and Trish highlights various mitigation measures, including advanced firefighting techniques and vapor barriers. The episode underscores the continual evolution of safety technologies and emphasizes the importance of embracing new developments to enhance facility safety.

This episode discusses the 1989 Pasadena chemical plant explosion that claimed 23 lives. The incident led to the modernization of process safety measures in the U.S. Trish and Traci emphasize the importance of dedicated firewater systems, meticulous maintenance procedures, and strategies to combat complacency. They also explore the use of case studies and emphasize the positive legacy of Mary Kay O'Connor in promoting process safety. Subscribe to stay informed and visit chemicalprocessing.com for additional resources.

A deep understanding of risks empowers us to make informed decisions

Plants with good safety performance can become complacent over time, and lessons learned from incidents are often forgotten. It's crucial to instill and maintain a culture of constant unease to ensure ongoing safety. According to the article, Former chair of the UK's Health and Safety Executive Judith Hackitt bluntly warns: “Be clear that your role is to create unease, not to provide false (re)assurance.”

In any facility, we always need to consider the risks and ensure we are managing them with appropriate controls to ensure process safety. Especially when we make changes, we need to ensure that different circumstances are considered.

In this episode, we discuss risk assessment. The chemical industry is a high-hazard industry. That does not mean it has to be high-risk. We have to effectively manage risk to prevent an incident, and then if prevention fails, mitigate the consequences. If we get this wrong, people die. 

In our latest episode, we sit down with Dr. Cheryl Bodnar, one of the brilliant minds behind "Contents Under Pressure," an immersive game designed to teach process safety. Discover the story behind the game and its impact on education and industry. https://contentsunderpressure.engineering.uconn.edu/ Transcript: https://chemicalprocessing.com/33010965

By following these tips, chemical facilities can enhance the effectiveness of their process-hazard reviews in the Management of Change (MoC) process, minimizing the risk of missing critical safety considerations and ensuring a robust safety management system.

In Case You Missed It edition of Process Safety with Trish and Traci. In Case You Missed It brings the written word to life. In today's episode, Trish Kerin, the director of IChemE Safety Centre, and Stay Safe columnist for Chemical Processing, will read her column “Prepare For The Worst”, which appeared in the August 2023 edition of Chemical Processing magazine. She explains how safety training saved her from dying during a scuba diving mishap

The tragedy exposed various deficiencies in safety management and emergency response. It remains a stark reminder of the importance of rigorous risk assessment, effective control measures, continuous monitoring of safety systems, and fostering a culture where workers feel empowered to stop unsafe work.