DHS 157.27(3)(c) (c) A licensee shall also consider limitations appropriate to the type and mode of use. When selecting respiratory devices the licensee shall provide for vision correction, adequate communication, low temperature work environments, and the concurrent use of other safety or radiological protection equipment. The licensee shall use equipment in such a way as not to interfere with the proper operation of the respirator.

DHS 157.27(3)(d) (d) Standby rescue persons are required whenever one-piece atmosphere-supplying suits, or any combination of supplied air respiratory protection device and personnel protective equipment are used from which an unaided individual would have difficulty extricating himself or herself. The standby persons shall be equipped with respiratory protection devices or other apparatus appropriate for the potential hazards. The standby rescue persons shall observe or otherwise maintain continuous communication with the workers via visual, voice, signal line, telephone, radio, or other suitable means, and be immediately available to assist them in case of a failure of the air supply or for any other reason that requires relief from distress. A sufficient number of standby rescue persons shall be immediately available to assist all users of this type of equipment and to provide effective emergency rescue if needed.

DHS 157.27 Note Note: Examples of means of continuous communication are visual, voice, signal line, telephone, radio or other suitable means.

DHS 157.27(3)(e) (e) Atmosphere-supplying respirators shall be supplied with respirable air that meets the following requirements:

DHS 157.27(3)(e)1. 1. Oxygen content of 19.5-23.5 percent.

DHS 157.27(3)(e)2. 2. Condensed hydrocarbon content of 5 milligrams per cubic meter of air or less.

DHS 157.27(3)(e)3. 3. Carbon monoxide content of 10 ppm or less.

DHS 157.27(3)(e)4. 4. Carbon dioxide content of 1,000 ppm or less.

DHS 157.27(3)(e)5. 5. Lack of noticeable odor.

DHS 157.27(3)(f) (f) A licensee or registrant shall ensure that no objects, materials or substances, such as facial hair, or any conditions that interfere with the face to facepiece seal or valve function, and that are under the control of the respirator wearer, are present between the skin of the wearer’s face and the sealing surface of a tight-fitting respirator facepiece.

DHS 157.27(3)(g) (g) In estimating the dose to individuals from intake of airborne radioactive materials, the concentration of radioactive material in the air that is inhaled when respirators are worn is initially assumed to be the ambient concentration in air without respiratory protection, divided by the assigned protection factor. If the dose is later found to be greater than the estimated dose, the corrected value must be used. If the dose is later found to be less than the estimated dose, the corrected value may be used.

DHS 157.27(4) (4) Application for use of higher assigned protection factors.

DHS 157.27(4)(a) (a) A licensee or registrant shall obtain authorization from the department before using assigned protection factors in excess of those specified in ch. DHS 157 Appendix D.

DHS 157.27(4)(b) (b) The department may authorize a licensee or registrant to use higher assigned protection factors on receipt of an application that meets the following criteria:

DHS 157.27(4)(b)1. 1. Describes the situation for which a need exists for higher protection factors.

DHS 157.27(4)(b)2. 2. Demonstrates that the respiratory protection equipment provides these higher protection factors under the proposed conditions of use.

DHS 157.27 History History: CR 01-108: cr. Register July 2002 No. 559, eff. 8-1-02; correction in (4) (a) made under s. 35.17, Stats., Register January 2018 No. 745.

DHS 157.28 DHS 157.28 Storage and control of licensed or registered sources of radiation.

DHS 157.28(1) (1) Security and control of licensed or registered radioactive material.

DHS 157.28(1)(a) (a) Security of stored radioactive material. A licensee or registrant shall secure licensed or registered radioactive material that is stored in an unrestricted area from unauthorized removal or access.

DHS 157.28(1)(b) (b) Control of radioactive material not in storage. A licensee or registrant shall maintain constant surveillance, or use devices or administrative procedures, to prevent unauthorized use of licensed or registered radioactive material that is in an unrestricted area and that is not in storage.

DHS 157.28(2) (2) Security and control of registered radiation machines.

DHS 157.28(2)(a) (a) A registrant shall secure registered radiation machines from unauthorized removal.

DHS 157.28(2)(b) (b) A registrant shall use devices or administrative procedures to prevent unauthorized use of registered radiation machines.

DHS 157.28 History History: CR 01-108: cr. Register July 2002 No. 559, eff. 8-1-02; CR 06-021: am. (1) (a) Register October 2006 No. 610, eff. 11-1-06.

DHS 157.29 DHS 157.29 Precautionary procedures.

DHS 157.29(1) (1) Caution signs.

DHS 157.29(1)(a) (a) Standard radiation symbol. Unless otherwise authorized by the department, the standard radiation symbol shall use the colors magenta, purple or black on a yellow background and shall be the 3-bladed design depicted in Figure DHS 157.29.

Figure DHS 157.29. Radiation Symbol