Archive for the ‘Toxicity’ Category
Thursday, October 7th, 2010
EPA announced that the promulgation of National Emission Standards for Hazardous Air Pollutants (NESHAP) for industrial, commercial, and institutional boilers and process heaters is postponed to January 16, 2011. The regulation, commonly referred to as Boiler MACT, will affect approx. 13,500 boilers at various facilities deemed to be major sources of hazardous air pollutants (HAPs).
The ...
Posted in Health, Regulations, Toxicity | 1 Comment »
Monday, August 23rd, 2010
OSHA is asking stakeholders to identify hazardous chemicals they believe are most in need of action.
Why?
"OSHA realizes the inadequacy of many of its Permissible Exposure Limits (PELs) and is seeking creative solutions, both long term and short term, to address this inadequacy."
For the benefit of the readers of the ...
Posted in HSE, Industrial Hygiene, Regulations, Toxicity | 1 Comment »
Thursday, July 29th, 2010
A few weeks ago, I had written a post comparing threshold exposure values for SO2 and H2S. After that post, Lee Pharis, one of the blog readers, forwarded me an email describing the new EPA standard for SO2 exposure.
EPA has set the one-hour SO2 health standard at 75 parts per ...
Posted in Regulations, Toxicity | 1 Comment »
Friday, June 25th, 2010
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!
Intuitively, I did not think SO2 was as toxic ...
Posted in Consequence Modeling, Dispersion, Toxicity | 3 Comments »
Wednesday, June 23rd, 2010
[Table = 13]
Source: Compressed Natural Gas Safety Bulletin, SB-2, 1992.
Posted in Confined Space, Health, Process Safety, Toxicity | 1 Comment »
Friday, July 31st, 2009
On the morning of July 19, a fire in CITGO's Corpus Christi refinery injured a worker. The incident occurred in the alkylation unit of the refinery.
The refinery used Hydrogen Fluoride (HF) as a catalyst for alklyation . Typically in the alkylation process, isobutane and olefins are combined (in presence of ...
Posted in Chemical Accidents, Inherent Safety, Toxicity | 4 Comments »
