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by Sanjeev Saraf Leave a Comment

SO2 Vs. H2S: Which Is More Toxic?

SO2 Vs. H2S: Which Is More Toxic?

I noticed that API-14C recommends monitoring of 2-ppm (and higher) SO2 levels. I felt this was a really low threshold value for SO2 .

What surprised me further is that the Immediately Dangerous to Life or Health (IDLH) value for SO2 is 100-ppm…same as H2S!

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Symptoms Of Oxygen Deficient Atmosphere

Symptoms Of Oxygen Deficient Atmosphere

Oxygen Deficient Atmosphere (<19.5%)

Oxygen Concentration (% Volume)Symptoms of acute exposure
15-19May impair coordination. Decreased ability to perform tasks
12-15Impaired coordination, perception, and judgment
10-12Increased breathing rate, poor coordination and judgment, lips slightly blue
8-10Mental failure, fainting, unconsciousness, ashen face, blueness of lips, nausea, upset stomach and vomiting
6-88 minute exposure: may be fatal in 50-100%; 6 minute exposure: may be fatal in 25-50%; 4-5 minutes exposure: Recovery with treatment
4-6Coma in 40-seconds, followed by convulsions, breathing failure, death

Source: Compressed Natural Gas Safety Bulletin, SB-2, 1992.

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Nitrogen Asphyxiation Hazards

Nitrogen Asphyxiation Hazards

We all know that air is mostly nitrogen…79% to be precise. What may not be a common knoweldge is that colorless odorless Nitrogen has led to asphyxiation and fatalities and is a risk particularly for personnel working in confined spaces and personnel utilizing breathing air systems.

According to the Chemical Safety Board (CSB) research there were 80 nitrogen asphyxiation fatalities between 1992-2002. This translates to one nitrogen asphyxiation death every seven weeks. Approximately, 10% of fatalities were due to attempts to rescue person in confined spaces.

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Safety Rap

Safety Rap

Take a look at the following video from Dominion Power:

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Indoor Dispersion: A Simple Model To Estimate Indoor Concentrations

Indoor Dispersion: A Simple Model To Estimate Indoor Concentrations

While evaluating impact of a toxic release, you may be interested in how the concentration of the toxicant increases in a room and its impact on indoor personnel. For example, if there is a H2S release in the plant and you want to estimate the increase in concentration in a nearby office building.

I want to share a simple model to estimate indoor concentrations following an outdoor toxic release. [Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

RFID: Potential Ignition Source

RFID: Potential Ignition Source

Earlier I had written about the use of RFID for tracking hazardous substances. One of the readers, Sujith, wrote to me that RFID can be a ignition source and thus pose a potential for fire/explosion.

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf 1 Comment

Value Of Life

Value Of Life

As safety professionals, we are often required to consider value of life in decision making.

So, what is the economic value of a life? According to the U.S. Department of Transportation (DOT), it is $5.8 million [in 2010]. Click on the link below to read more…

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Worker Safety? There’s An App For That!

Worker Safety? There’s An App For That!

I have always been fascinated by Apple products. Apple’s iPhone besides providing the “cool” touchscreen also lets developers create customized applications. Here are a few safety applications you may find useful:

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Risk And Safety

Risk And Safety

I had been  away from writing blog posts for last 3 months or so…mainly because of my travel to S. Korea. I have also been kept busy working on adding advanced features to Risk and Safety site. I will unveil them in the coming few months.

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Use Of RFID In Process Safety: Track Hazardous Chemicals And Track Personnel

Use Of RFID In Process Safety: Track Hazardous Chemicals And Track Personnel

RFID stands for Radio-Frequency IDentification. It is a small electronic device that consist of a chip (capable of carrying 2000 bytes of data) and an antenna.

A RFID device provides a unique identifier and serves the same purpose as a bar code on a consumer product or a magnetic strip on the back of a credit card.

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Is Safety Training Helpful?

Is Safety Training Helpful?

Workplace Safety training is a big industry…every year companies are spending millions of dollars on training their employees.

I have always doubted the efficacy of repetitive and boring training sessions whether personal or virtual (Will your Refresher Training Work?). What is more surprising is that organizations are increasing their training budget without evaluating efficacy of their training program.

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Exploding Concrete

Exploding Concrete

I recently came across a very interesting incident involving foam concrete.

Foam concrete is produced by mechanical mixing of foam prepared in advance with concrete mixture, and not with the help of chemical reactions. At the incident site, two workers were removing steelwork using angle grinders while the foam concrete was settling. There was an explosion injuring the two workers.

Foam concrete produces hydrogen which is highly flammable.

To know more about foam concrete hazards, click on the link below.

Health and Safety Alert on Foam Concrete Fire Hazards

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Biodiesel Incidents Trend

Biodiesel Incidents Trend

Based on incident data in biodiesel facilities, I had written that the biodiesel industry in the US is experiencing an incidentevery two-and-a-half months, i.e. approx. 10 weeks.

Here are incidents following my May 2009 blog post on biodiesel incident frequency.

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Near-Miss(Es)!!!

Near-Miss(Es)!!!

A friend of mine, Dr. Ben Thomas, recently forwarded me a video showing a man escaping incident in matter of seconds.

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

by Sanjeev Saraf Leave a Comment

Is Workplace Safety Merely Common Sense?

Is Workplace Safety Merely Common Sense?

Surprisingly, many organization and professionals believe that safety can be achieved by common sense. Here is an excellent article from Kevin Jones’ Safety at Work blog about common sense and safety:

[Read more…]

Filed Under: Articles, on Risk & Safety, Operational Risk Process Safety

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