(a) Definition. Chemicals used in concrete etching as well as to remove petroleum-based soils, lubricants, paints, mastics, organic soils, rust, and dirt from concrete, asphalt, stone and other hard porous surfaces. Products within this item include only those marketed for use in commercial or residential construction or industrial applications.

(b) Minimum biobased content. The Federal preferred procurement product must have a minimum biobased content of at least 70 percent, which shall be based on the amount of qualifying biobased carbon in the product as a percent of the weight (mass) of the total organic carbon in the finished product.

(c) Preference compliance date. No later than July 23, 2012, procuring agencies, in accordance with this part, will give a procurement preference for qualifying biobased concrete and asphalt cleaners. By that date, Federal agencies that have the responsibility for drafting or reviewing specifications for items to be procured shall ensure that the relevant specifications require the use of biobased concrete and asphalt cleaners.