Representative Sample 03 : A sample of two sprinkler heads per floor or individual riser, in any case not less than four, or one percent of the number of sprinkler heads per system, whichever is greater
Environmental Health and Safety, Glossary, University of Chicago, Illinois, USA 2010. http://safety.uchicago.edu/tools/glossary.shtml, (Ergo - Amer) {753}