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"Identification"
CPSC
The identification process is two steps:
(1) an initial or threshold inspection
 visual signs
of metal corrosion
evidence of
drywall installation during the relevant time period
(2) the identification of corroborating evidence or characteristics.
CPSC Identification Protocols
http://www.cpsc.gov/info/drywall/InterimIDGuidance012810.pdf
Physical
indicators
Smell
Colors on sheetrock
paper
Names on back
of sheetrock
Eagle emblem
Smell
Blackened wires
Tarnishing of
any exposed or unexposed metals
Lighting problems
Wiring in electronics
and appliances
Stove elements
A/C & electrical
failures
Hurricane -
Flood - Storm homes
New or remodels
since 2001
Peak years 2003
to 2007
Who
Made This Problem?
The
following list identifies the top 10 drywall samples tested that
had the highest emissions of hydrogen sulfide, along with the identity
of the manufacturer of the drywall and the year of manufacture,
from highest to lowest.
Knauf
Plasterboard (Tianjin) Co. Ltd.: (year of manufacture 2005) China
Taian Taishan
Plasterboard Co. Ltd.: (2006) China
Shandong Taihe
Dongxin Co.: (2005) China
Knauf Plasterboard
(Tianjin) Co. Ltd.: (2006) China
Taian Taishan
Plasterboard Co. Ltd.: (2006) China
Taian Taishan
Plasterboard Co. Ltd.: (2006) China
Shandong Chenxiang
GBM Co. Ltd. (C&K Gypsum Board): (2006) China
Beijing New
Building Materials (BNBM): (2009) China
Taian Taishan
Plasterboard Co. Ltd.: (2009) China
Shandong Taihe
Dongxin Co.: (2009) China
Source CPSC.gov
Other
Chinese drywall samples had low or no detectable emissions of hydrogen
sulfide as did the drywall samples tested that were manufactured
domestically.
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Knauf
Plasterboard Tianjin
Tiger
ShiGao JianCa
USG Corporation
Guangdong Knauf
Knauf Plasterboard (Wuhu)
CertainTeed Corp.
Georgia Pacific Corp.
Dragon Brand, Beijing New Building Materials Co.
CertainTeed Corp.
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Pingyi
Baier Building Materials Co. Ltd.
Panel Rey S.A.
Lafarge North America
National Gypsum Company
National Gypsum Company
Georgia Pacific Corp
Pabco Gypsum
Temple-Inland Inc
USG Corporation |
This
consortium has tested patch and badge type H2SO testers in several
homes with no conclusive or satisfying results and would advise
not depending on them for identification.
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