I have written a lot about the hazards of “pressure testing” piping, and in all of those posts I have stated how much “safer” Hydrostatic Testing is, compared to pneumatic testing. But this fatal accident shows us that even hydrostatic testing comes with fatal risks. During a hydrostatic pressure test of a fire suppression system,…...
The AT&T Standard Section 620-140-501 (often referred to as Bell System Practice, or BSP, 620-140-501), published in June 1976, is a foundational safety document for the telecommunications industry. It outlines the strict procedures for testing, purging, and ventilating manholes and other confined spaces before and during employee entry. Because telecommunications workers frequently operate in underground…...
I have a 10,000-gallon storage tank that I need to ventilate with forced-air ventilation. My program states I need to achieve at least 7 air changes per hour. What CFM blower do I need to achieve this? This is the question I asked Google Gemini 3.1 Pro, and I’ll be damned, it was SPOT ON!…...
Bear with me on this, as I know this is getting deeper than most think about Respiratory Protection. But the vast majority of the people I train and fit test are personnel who enter/work in IDLH environments, so I get very picky about my RP practices. OSHA’s long-standing Fit Test Procedures in Mandatory Appendix A…...
On February 4, 2004, a 23-year-old tank mechanic died from lack of oxygen after entering a chemical transport tank prior to a scheduled inspection. The employer was a longtime Oregon company, based in Portland, specializing in the manufacture and maintenance of transportation tanks. At the time, the firm had 5 factories and 11 sales branches…...
On August 11, 2003, a 50-year-old production worker was seriously burned and died 5 days later from a fire that resulted when stored wood flour exploded at a wood-flour mill. The employer is a wood-flour mill that grinds paper-mill waste into a fine powder, and bags and stores it as a marketable product for a…...
In September 2010, a 48-year-old male worker (Victim I) employed by a village Department of Public Works (DPW) and a 51-year-old male volunteer firefighter (Victim II) of the village Fire Department (FD) died after entering a sewer manhole. The manhole was located behind the firehouse. The Fire Chief and a firefighter were called in by…...
On September 16, 2024, a 20-year-old male wash bay attendant (victim) attempted to utilize an electric grease gun to apply grease to the rear axle of a liquid petroleum gas (LPG) tank trailer. As the victim activated the grease gun, a spark ignited the butane gas that was actively escaping the cargo tank, instantly engulfing…...
DISCLAIMER: I am NOT an Industrial Hygienist, so seek help elsewhere if you find this post intriguing. How many of you use the 95th Confidence Interval in your “Data Sampling”? Whether it’s personal sampling, area sampling, or any sampling looking for safety data, do you attempt to achieve the 95th confidence interval? A 95% confidence…...
The following are highlights from the 2025 summary of injuries and fatalities associated with agricultural confined spaces: CLICK HERE for the full 2025 report… Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here...
Choosing between methane and pentane for calibrating a direct-reading combustible gas indicator (CGI) depends primarily on your specific application, the target hazards in your environment, and sensor technology constraints. But there are BOTH a “Pentane Advantage” and a “Methane Advantage” Match the Target Gas (Best Practice for Specific Hazards)… Membership Required You must be a...
When you pump reactive, highly polar, or oxidizing gases like chlorine (Cl2), chlorine dioxide (ClO2), or ammonia (NH3) through standard silicone, polyurethane, or Tygon tubing, the tubing acts like a chemical absorber/scrubber. The gas is actively consumed or trapped by the hose before it ever reaches the instrument’s sensors. This creates severe process safety and…...
