EH&E / Consumer Product Safety Commission Study Links Chinese Drywall to Corrosion in Homes

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Environmental Health & Engineering Inc. (EH&E), a leading Massachusetts-based engineering consulting firm, has completed a major indoor air quality study for the U.S. government which found a strong association between the presence of Chinese drywall, low level concentrations of hydrogen sulfide, and corrosion of metals in homes. The drywall issue has affected thousands of homes in the United States for more than two years.
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  Press Release - FinalEH&E / Consumer Product Safety Commission Study Links Chinese Drywallto Corrosion in HomesNeedham, Mass. – November 24, 2009 – Environmental Health & EngineeringInc. (EH&E), a leading Massachusetts-based engineering consulting firm, hascompleted a major indoor air quality study for the U.S. government which found astrong association between the presence of Chinese drywall, low level concentrationsof hydrogen sulfide, and corrosion of metals in homes. The drywall issue has affectedthousands of homes in the United States for more than two years.The five-month EH&E study included 51 homes in five southern states; 41 homeswhere property owners had reported corrosion of wiring or piping, and ten similarhomes about which no complaints had been filed. The following findings werepresented by John F. McCarthy, Sc.D., C.I.H., president of EH&E, in a Congressionalbriefing at the U.S. Capital on Monday, November 23, 2009: ã In homes with suspect drywall, the following conditions were determined: o High rates of sulfur-based corrosion on copper and silver test coupons. o Visible corrosion of copper wires in electrical outlets. o Low level concentrations of hydrogen sulfide gas. o Low ventilation rates. o Associations of corrosion with hydrogen sulfide concentrations in air,temperature and humidity. ã A reliable real-time method of “fingerprinting” suspect drywall using state-of-the-art inspection equipment was developed and validated.The EH&E presentation to Congress and report prepared for the Consumer ProductSafety Commission are available for review at this website:http://www.eheinc.com/cpsc_drywall.htm.EH&E was selected for the project based on its high level of building scienceexpertise and field experience in characterizing complex indoor environments and inhomes, schools, and offices. The company had been the prime contractor for indoorair quality to the U.S. Environmental Protection Agency, and two of its principals,John D. Spengler, Ph.D., and John F. McCarthy, Sc.D., C.I.H., edited what isconsidered the most comprehensive guide available today on indoor air quality,the “Indoor Air Quality Handbook”. About EH&E EH&E (www.eheinc.com) has provided an extensive range of analytical andengineering consulting services for over 20 years. Our team consists of more than 60experts with an outstanding record of providing solutions for complex issues thataffect the built environment. EH&E has a depth of knowledge and credibilityunmatched in the industry and our wealth of readily-accessible information hasbecome a powerful resource for our clients.###Press contact: David Shore, 781-247-4300,dshore@eheinc.com 
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