May 4, 2010. Agency FOIA professionals typically find that working collaboratively and sharing experiences with fellow access professionals can be quite beneficial. To facilitate the exchange of ideas and information between agencies, OIP is convening two FOIA Working Groups. As agencies enter into their second year of work in improving the administration of the FOIA in accordance with the President's Memorandum on the FOIA and the Attorney General's FOIA Guidelines, this is an appropriate time for agencies to build on the successes of one another.
In a concerted effort to learn more. about the weathering characteristics. of TPO (thermoplastic polyolefin) sin -. gle ply roof membranes, WSRCA. began an in situ testing program dur -. ing the year 2000.
It cannot be compacted, and is spread rather than rolled. The British Standard for this type of roofing is BS 8218 :1998 Code of practice for mastic asphalt roofing. Single Ply-are flexible sheets composed predominately of synthetic polymer. Thickness is in the range 1.1mm to 2mm.