D/2 Biological Solution becomes part of a Presidential Executive Order

The National Cemetery Administration now uses D/2.  Quote: "The NCA  entered into an agreement with the National Center for Preservation Technology and  Training, NPS, to evaluate marble cleaners in an effort to minimize damage to historic headstones. The 3-phase study began in 2004 and was completed in 2011. The best  - practice recommendations resulted in NCA's determination to use the preferred cleaner, D/2 Biological Solution…" (Page 3)

From Presidential Executive Order 13287, Preserve America  FY 2011 Triennial Report Department of Veteran Affairs.  

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