The Final Demand-Intermediate Demand (FD-ID) system replaced the Producer Price Index (PPI) Stage-of-Processing (SOP) system as PPIs primary aggregation system with the release of data for January 2014. The FD-ID system expands coverage beyond that of the SOP system through the addition of services, construction, exports, and government purchases.
Ammonia Levels. Ammonia Levels. Ammonia smell in urine means possible health dangers, especially to rabbits. But here's a way to reduce or eliminate ammonia fumes and levels safely and easily.mmonia Levels. Ammonia smell in urine means possible health dangers, especially to rabbits. But here's a way to reduce or eliminate ammonia fumes and levels safely and easily.
A common statement heard from growers is âI have a little. ammonia in my house but itâs not bad.â The truth of the matter is that at levels of. 50 ppm ammonia or lower, most growers are not able to smell harmful levels of am-. monia in the house. Theoretically, the human nose can detect ammonia at around. 20 ppm.