S.D. Admin. R. 20:51:31:27
General Authority: SDCL 36-11-2.2, 36-11-11(1).
Law Implemented: SDCL 36-11-11.
Note: It is recommended that this be done using a pressure gauge or a velocity meter installed between the buffer area and ante area. In absence of a pressure gauge or velocity meter, unidirectional flow and velocity should be tested and documented semi-annually at the time of hood and room certification.