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.
Back to articles. TPO stands for thermoplastic polyolefin and is a type of synthetic material often used in the construction of commercial and even some RV roofs. Roofing systems typically consist of three elements: a structural deck, a thermal insulation barrier and a waterproofing membrane.PO stands for thermoplastic polyolefin and is a type of synthetic material often used in the construction of commercial and even some RV roofs. Roofing systems typically consist of three elements: a structural deck, a thermal insulation barrier and a waterproofing membrane.