4.5 A graduated cylinder or other volumetric measuring device of at least 50 milliliters in volume with an accuracy of at least plus or minus milliliters. The person conducting the test shall review the MSDS for aqueous ammonia. Since the established permissible exposure limit for ammonia is 35 ppm as a 15 minute STEL, only persons wearing a positive pressure self-contained breathing apparatus or a positive pressure supplied air respirator shall be in the chamber. Normally only the person wearing the totally-encapsulating suit will be inside the chamber. 5.3 A method to monitor the suited individual must be used during this test.
Visual contact is the simplest but other methods using communication devices are acceptable.
5.5 Individuals shall be medically screened for the use of respiratory protection and checked for allergies to ammonia before participating in this test procedure. Measure the test area to the nearest foot and calculate its volume in cubic feet. Multiply the test area volume by 0.2 milliliters of concentrated aqueous ammonia solution per cubic foot of test area volume to determine the approximate volume of concentrated aqueous ammonia required to generate 1000 ppm in the test area. Measure this volume from the supply of concentrated aqueous ammonia and place it into a closed plastic container. Place the container, several high range ammonia detector tubes, and the pump in the clean test pan and locate it near the test area entry door so that the suited individual has easy access to these supplies.