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Saturday, September 08, 2007

Measured Levels of Hydrogen Sulfide

This graph depicts hydrogen sulfide (H2S) levels measured at the dewatering site on Woodbine Ct. on September 7, 2007 starting at approximately 7PM.

(click graph to enlarge)

The variations in measures (from near zero to the near-lethal levels of 139PPM) are due to the distances from the sources of the effluent to the measuring device.

The highest levels were taken 1-2 feet from the source, the measures of 2-4PPM were taken as far away as approximately 100 feet from the source. The mid-range toxic levels were taken approximately 20-40 feet from the source.

Please refer to the studies (on this blog) as to the health effects of exposure to hydrogen sulfide at these levels.

Updated on September 9, 2007. The following are the videos taken of the above contamination site.


  • I hope that you intend to notify the media. They may be our only hope. I am sure that you realize that the city will try to discredit your findings. I would hope that you are absolutely confidant that the meter used was calibrated accurately. I would also hope that you had more than one meter from another manufacturer to further demonstrate the levels of hydrogen sulfide found. Unfortunately I believe that the city will attack your methods and the equipment used.
    Environ is probably in their back pocket. This is a horrendous situation with gruesome consequences.

    By Anonymous Anonymous, at Saturday, September 08, 2007 8:05:00 PM  

  • agreed and understood. given the cost of the device , one - for a limited time - is the best that can be done at this time. but you are correct - two at the same time is essential for a sound study. i have asked the manufacturer to provide documentation certifying accuracy and calibration. i suspect it is because subsequent readings at another site that has been pumping for over a week yielded much smaller reading (i will post these later today).

    and yes, the city will attack anything that does not fall into their plan of commercialization at all costs. because after all that is why the city is doing this project - health and sanitation are irrelevant. but ... since the city has no credibility with honest, rational open-minded people, its almost like a badge of honor.

    thank you for the post.

    By Blogger Dr. Mario, at Sunday, September 09, 2007 9:11:00 AM  

  • The Department of Health and Human Services has established 0.02 ppm (that's 2 one-hundreths of a part per million or 20 parts per billion) as the level that provides an acceptable risk (MRL or minimum risk level) to adults in good health who are breathing it for a period of 15 days.

    Ed Foster

    By Anonymous CARES-CHAIR, at Sunday, September 09, 2007 8:26:00 PM  

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