Re: Chinese Drywall

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I was informed about some misinformation that has been
posted on this chat board and was asked to report the facts
in case there are actually researchers and scientists that
read posts on this chat board.

Contrary to the erroneous claims of anonymous posters on
this chat board, there have been high levels of hydrogen
sulfide gas COMMONLY found in the air in homes in Louisiana
and Florida as well as carbonyl sulfide and carbon disulfide
when Chinese drywall has been used in the construction of
homes.

Contrary to misinformation posted on this chatboard,
hydrogen sulfide is not only commonly found in the air from
Chinese drywall samples, when sampling is done properly, but
in high concentrations causing nose bleeds and burning the
eyes, nose and throats of people living in the homes. I have
taken hundreds of samples from homes in several states and
the results are consistent. Iron disulfide is a contaminant
in Chinese drywall with levels up to 2,400 ppm, while US
drywall will average 349 ppm based on my sampling. Strontium
sulfide levels, another contaminant,are many times higher in
Chinese drywall compared to US drywall according to testing
using XRF technology. This compound is known to produce
hydrogen sulfide gas.

The Agency for Toxic Substances and Disease Registry,
Public Health Service, U. S. Dept. of Health and Human
Services has published a minimum risk level of only 0.020 ppm
in the air while EPA has established a chronic inhalation
reference concentration of 0.002 mg/cubic meter of air in a
home base on a no adverse effect level (NOAEL) of 13.9
mg/cubic meter of air. ( 0.001 ppm = 0.002 mg/cubic meter of
air.) These air levels are often exceeded in homes containing
Chinese drywall and inhalation is the primary method of
exposure with hydrogen sulfide gas.

I hope these facts clear up some of the misinformation
concerning Chinese drywall is case there are scientists and
researchers that read this chat board.

Dr. Richard Lipsey (904) 398-2168
550 Water St, #1230, Jacksonville, FL 32202
Toxicologist and former Univ. Florida Professor, Toxicology,
& Adj Prof, Univ. N. FL, teaching OSHA HazMat certification,
Fla. Comm. College Jax, Institute of Occ. Safety & Health,
Florida Poison Info Center, Jax., Clinical Tox Advisory Comm.
www.richardlipsey.com