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.
TPO, PVC, EPDM. To the average buyer of roofing services, there appears to be a never ending march of an alphabet soup. If you are in the market for a new roof system or are responsible for maintaining an existing roof system, you have most likely heard of TPO membrane. TPO is a type of single ply roofing membrane. TPO is an acronym that stands for Thermoplastic Polyolefin. It is an abbreviated way of stating the primary chemical composition of the roof membrane.