Oregon Administrative Rules › Chapter 437 - DEPARTMENT OF CONSUMER AND BUSINESS SERVICES, OREGON OCCUPATIONAL SAFETY AND HEALTH DIVISION › Division 2 - GENERAL OCCUPATIONAL SAFETY AND HEALTH RULES › Section 437-002-0364 - Oregon Rules for MOCA (4,4'-Methylene Bis (2-chloroaniline))

Current through Register Vol. 63, No. 7, July 1, 2024
(1) Application.
			 This rule applies to any areas in which MOCA (4,4'-Methylene bis
			 (2-chloroaniline)) (CAS# 101-14-4) is manufactured, processed, repackaged,
			 released, handled, or stored, but shall not apply to transhipment in sealed
			 containers, except for the labeling requirements under OAR
			 437-002-0364(5)(b),
			 (c), and (d).
(2) Definitions:
"Absolute filter" is one capable of retaining 99.97 percent of
				a monodisperse aerosol of 0.3 µm particles.
"Administrator" means the Administrator of the Oregon
				Occupational Safety and Health Division, or any person directed to act for the
				Administrator.
"Authorized employee" means an employee whose duties require
				them to be in the regulated area and who has been specifically assigned by the
				employer.
"Clean change room" means a room where employees put on clean
				clothing and/or protective equipment in an environment free of MOCA. The clean
				change room shall be contiguous to and have an entry from a shower room, when
				the shower room facilities are otherwise required in this rule.
"Closed system" means an operation involving MOCA where
				containment prevents the release of MOCA into regulated areas, non-regulated
				areas, or the external environment.
"Decontamination" means the inactivation of MOCA or its safe
				disposal.
"Disposal" means the safe removal of MOCA from the work
				environment.
"Emergency" means an unforeseen circumstance or set of
				circumstances resulting in the release of MOCA which may result in exposure to
				or contact with MOCA.
"External environment" means any environment external to
				regulated and non-regulated areas.
"Isolated system" means a fully enclosed structure other than
				the vessel of containment of MOCA which is impervious to the passage of MOCA
				and which would prevent the entry of MOCA into regulated areas, non-regulated
				areas, or the external environment, should leakage or spillage from the vessel
				of containment occur.
"Laboratory type hood" is a device enclosed on three sides and
				the top and bottom, designed and maintained so as to draw air inward at an
				average linear face velocity of 150 feet per minute with a minimum of 125 feet
				per minute; designed, constructed, and maintained in such a way that an
				operation involving MOCA within the hood does not require the insertion of any
				portion of any employee's body other than their hands and arms.
"Non-regulated area" means any area under the control of the
				employer where entry and exit is neither restricted nor controlled.
"Open-vessel system" means an operation involving MOCA in an
				open vessel, which is not in an isolated system, a laboratory type hood, nor in
				any other system affording equivalent protection against the entry of MOCA into
				regulated areas, non-regulated areas, or the external environment.
"Protective clothing" means clothing designed to protect an
				employee against contact with or exposure to MOCA.
"Regulated area" means an area where entry and exit is
				restricted and controlled.
(3)
			 Requirements for areas containing MOCA.
(a) A
			 regulated area shall be established by an employer where MOCA is manufactured,
			 processed, used, repackaged, released, handled or stored. All such areas shall
			 be controlled in accordance with the requirements for the following category or
			 categories describing the operation involved:
(A) Isolated systems. Employees working with
			 MOCA within an isolated system, such as a "glove box" shall wash their hands
			 and arms upon completion of the assigned task and before engaging in other
			 activities not associated with the isolated system.
(B) Closed system operation. Within regulated
			 areas where MOCA is stored in sealed containers, or contained in a closed
			 system, including piping systems, with any sample ports or openings closed
			 while MOCA is contained within:
(i) Access
			 shall be restricted to authorized employees only; and
(ii) Employees shall be required to wash
			 hands, forearms, face and neck upon each exit from the regulated areas, close
			 to the point of exit and before engaging in other activities.
(C) Open vessel system operations.
			 Open vessel system operations as defined in OAR
			 437-002-0364(2)
 
			 are prohibited.
(D) Transfer from a
			 closed system, charging or discharging point operations, or otherwise opening a
			 closed system. In operations involving "laboratory type hoods," or in locations
			 where MOCA is contained in an otherwise "closed system," but is transferred,
			 charged, or discharged into other normally closed containers, the provisions of
			 this rule shall apply.
(i) Access shall be
			 restricted to authorized employees only.
(ii) Each operation shall be provided with
			 continuous local exhaust ventilation so that air movement is always from
			 ordinary work areas to the operation. Exhaust air shall not be discharged to
			 regulated areas, non-regulated areas or the external environment unless
			 decontaminated. Clean make-up air shall be introduced in sufficient volume to
			 maintain the correct operation of the local exhaust system.
(iii) Employees shall be provided with, and
			 required to wear, clean, full body protective clothing (smocks, coveralls, or
			 long-sleeved shirt and pants), shoe covers and gloves prior to entering the
			 regulated area.
(iv) Employees
			 engaged in MOCA handling operations must be provided and required to wear and
			 use respiratory protection, in accordance with OAR 437, Division 2/I, Personal
			 Protective Equipment, 1910.134, Respiratory Protection.
(v) Prior to each exit from a regulated area,
			 employees shall be required to remove and leave protective clothing and
			 equipment at the point of exit and at the last exit of the day, to place used
			 clothing and equipment in impervious containers at the point of exit for
			 purposes of decontamination or disposal. The contents of such impervious
			 containers shall be identified, as required under OAR
			 437-002-0364(5)(b),
			 (c) and (d).
(vi) Employees shall be required to wash
			 hands, forearms, face and neck on each exit from the regulated area, close to
			 the point of exit, and before engaging in other activities.
(vii) Employees shall be required to shower
			 after the last exit of the day.
(viii) Drinking fountains are prohibited in
			 the regulated area.
(E)
			 Maintenance and decontamination activities. In cleanup of leaks or spills,
			 maintenance or repair operations on contaminated systems or equipment, or any
			 operations involving work in an area where direct contact with MOCA could
			 result, each authorized employee entering that area shall:
(i) Be provided with and required to wear
			 clean, impervious garments, including gloves, boots and continuous-air supplied
			 hood in accordance with OAR 437, Division 2/I, Personal Protective Equipment;
(ii) Be decontaminated before
			 removing the protective garments and hood; and
(iii) Be required to shower upon removing the
			 protective garments and hood.
(F) Premixed solutions. Where MOCA is present
			 only in a single solution at a temperature not exceeding 220° F, the
			 establishment of a regulated area is not required; however:
(i) Only authorized employees shall be
			 permitted to handle such materials;
(ii) Each day employees shall be provided
			 with and required to wear a clean change of protective clothing (smocks,
			 coveralls, or long-sleeved shirts and pants), gloves, and other protective
			 garments and equipment necessary to prevent contact with the solution in the
			 process used;
(iii) Employees
			 shall be required to remove and leave protective clothing and equipment when
			 leaving the work area at the end of the work day, or at any time solution is
			 spilled on such clothing or equipment. Used clothing and equipment shall be
			 placed in impervious containers for purposes of decontamination or disposal.
			 The contents of such impervious containers shall be identified, as required
			 under OAR
			 437-002-0364(5)(b),
			 (c) and (d).
(iv) Employees shall be required to wash
			 hands and face after removing such clothing and equipment and before engaging
			 in other activities;
(v) Employees
			 assigned to work covered by OAR
			 437-002-0364(3)(a)(F)
 
			 shall be deemed to be working in regulated areas for the purposes of OAR
			 437-002-0364(4)(a);
			 (b)(A), (B); (c)(C), (D), and
			 437-002-0364(5)
			 through (7).
(vi) Work areas where solution may be spilled
			 shall be:
(I) Covered daily or after any
			 spill with a clean covering; or
(II) Cleaned thoroughly daily and after any
			 spill.