Quoted:
D2 Biological Control
If you don't know what you're doing you can cause irreparable damage.
You can rely on GD, or use what those below use.
Users Of D/2
Organizations
Alabama Cemetery Preservation Alliance
Alabama Historical Commission
Architect of the Capital
Colonial Williamsburg Foundation
Department of Veterans Affairs
Frank Lloyd Wright Foundation
Georgia Municipal Cemetery Association
Indiana Department of Natural Resources
National Park Service
Oregon Historical Commission
Smithsonian Institute
Texas Historical Commission
Sites
Biltmore Estate
DuPont Estate
Fort at Old San Juan, Puerto Rico
Harper’s Ferry
LBJ Library
Monticello
Mount Vernon
San Juan Capistrano
The Alamo
The White House
U.S. Capitol
U.S. Customs House
U.S. Supreme Court
Vizcaya Mansion
Washington Monument
Watts Towers
Museums
Holocaust Museum, DC
Metropolitan Museum of Art, NY
Museum of Natural History, NY
Museum of the American Indian, DC
National Portrait Gallery, DC
New York Public Library, NY
State Capitols
Florida State Capitol
Louisiana State Capitol
Mississippi State Capitol
Montana State Capitol
Universities
Columbia University
Dartmouth College
Harvard University
Loyola University
Princeton University
Rice University
Rochester University
Rowan University
U.S. Military Academy at Westpoint
U.S. Navel Academy at Annapolis
University of Maryland
Yale University
[b]Cemeteries[b/]
(All Civil War National Cemeteries)
Andrew Johnson National Cemetery
Antietem National Cemetery
Arlington National Cemetery
Congressional Cemetery, DC
Gettysburg National Cemetery
Mount Auburn Cemetery, MA
Natchez National Cemetery
Old Burial Hill, Plymouth, MA
Swan Point Cemetery, RI
Thomas Jefferson Cemetery
Tomb of the Unknown Soldier
Vicksburg National Cemetery
Woodlawn Cemetery, NY
More information on cleaning gravestones