TITLE:	ES&H Manual
DOCUMENT ID:	6630 Appendix T1 Engineering Controls – Fixed and Portable Exhaust Ventilation

1.0 Purpose

Whenever respiratory hazards cannot feasibly be mitigated through material substitution, engineering controls (in the form of fixed and/or portable exhaust ventilation) are the preferred methods. This appendix provides how to determine if engineering controls are required; appropriate use parameters; and repair, maintenance, and inspection schedules.

2.0 Scope

This appendix covers fixed and portable exhaust ventilation available at Jefferson Lab. Table 1 provides the minimum capture velocities required to mitigate a hazard for a typical condition. These are representative conditions found at Jefferson Lab, other conditions may apply. Contact Industrial Hygiene if there is concern regarding your specific condition.

Table 1 - Fixed and Portable Exhaust

Condition Examples	Contaminant Velocity	Minimum Capture Velocity (feet per minute)
Vapors from degreasing, or soldering	No significant velocity	50–100
Spray paint booths, welding, solvent, and acid work	Low initial velocity	100–200
Spray painting into shallow booths, container filling, and crushing	Significant velocity	200–500
Grinding, and abrasive-blasting	High velocity	500–2000

This appendix is written in coordination with ES&H Manual Chapter 6630 Respiratory Protection Program. All applicable content within the chapter applies to the process steps outlined in this appendix.

3.0 Responsibilities

NOTE: Management authority may be delegated to a task qualified Jefferson Lab employee at the discretion of the responsible manager.

3.1 Anyone at Jefferson Lab

· Request an equipment/area hazard evaluation from Industrial Hygiene if you have concerns regarding air quality.

· Use exhaust ventilation in accordance with intended condition.

· Submit a Facilities Management Work Request when equipment is not performing up to standards.

3.2 Facilities Management

· Repair exhaust ventilation as requested and maintain per manufacturer’s recommendations.

· Contact Industrial Hygiene when repair/maintenance activities have been performed.

3.3 Industrial Hygiene

· Recommend appropriate mitigation (including material substitution) for respiratory hazards in accordance with findings from the hazard evaluation.

· Perform and record exhaust ventilation inspections.

4.0 Process Steps

Figure 1 - Exhaust Ventilation Determination Process

4.1 Determining Need

In accordance with your Task Hazard Analysis, request a hazard evaluation for the work condition. When mitigation method is determined, follow the applicable instructions detailed in Table 2.

Table 2 - Instructions per Mitigation Method

IF	THEN
Material Substitution	Substitute material, and continue work.
Fixed Exhaust Ventilation Required* (e.g., chemical fume hood, capture hood, stud hood)	Submit a Facilities Management Work Request. (See ES&H Manual Chapter 3110 Facilities Design Review).
Portable Exhaust Ventilation Required (e.g., smoke eaters, HEPA vacuums)	Obtain system training, and continue work.
*All fixed exhaust units are installed by Facilities Management.

4.2 Use of Fixed Exhaust Ventilation

4.2.1 Prior to use:

· Read and abide by the manufacturer’s instructions.

· Ensure airflow is adequate for the condition.

· Read the Inspection Label (Figure 2):

o Ensure inspection is valid within one year of previous inspection. Contact Industrial Hygiene if out of date.

o Set work up to abide by:

§ appropriate sash height

§ working capture distances

Figure 2 - Example Fume Hood Inspection Label

Chemical Fume Hood Inspection Label

4.2.2 During use:

Abide by the following controls outlined in Table 3.

Table 3 – Fixed Exhaust Ventilation Controls

Parameter	Control
Face Velocity	· Maintain appropriate sash height or working capture distances. · Maintain the hood sash at the smallest practicable open area. · Use the sash as a protective shield.
Cross Drafts	Position material to minimize cross drafts.
Turbulence and/or Dead Spots	Minimize by: · Regulating face velocity · Placing items at least 6-inches from the opening. · Raising bulky objects off the work surface.
Capture Velocity	100% capture is required.
Storage	Hoods are not to be used for: · Routine storage or · Evaporation of spent chemicals.
Body Positioning	Keep head and body out of the pathway between contaminant/condition and capture. Never place your head inside a fume hood when chemicals are in use!
Personal Protective Equipment	Dependent on condition. See ES&H Manual Chapter 6620 Personal Protective Equipment Program for more information.

NOTE:

If at any time your exhaust ventilation is not functioning adequately:

· Discontinue use.

· Submit a Facilities Management Work Request for repair or maintenance.

· After repairs have been made, contact Industrial Hygiene to ensure adequate air flow.

4.2.3 Inspection:

Industrial Hygiene performs the following inspections on exhaust ventilation:

· Before initial start-up

· Annually thereafter

· After any adjustment, modification, or maintenance

Requirements based on inspection results are outlined in Table 4 below:

Table 4 – Fixed Exhaust Inspection Findings

If the Hood	Then
Passes inspection	· An appropriate hood inspection label is provided.
Does not pass inspection	· The hood is placed out of service. · A Facilities Management Work Request is submitted. · Another inspection is scheduled after repair of unit.

4.3 Use of Portable Exhaust Ventilation (HEPA Vacuum/Smoke Eater):

4.3.1 Prior to use:

· Obtain HEPA vacuum/smoke eater from IH.

· Select HEPA vacuum/smoke eater appropriate for task (seek assistance from IH for selection)

o Lead vacuums

o Particulate vacuum (general dusts & silica)

o Smoke eaters (selection based on type of welding/grinding)

· Read the Inspection Label (Figure 3):

o Ensure inspection is valid within one year of previous inspection. Contact Industrial Hygiene if out of date.

o Set work up to abide by:

§ working capture distances

Figure 3 - Example HEPA Vacuum / Smoke Eater Inspection Labels

HEPA Vacuum Certification Label

Inspection Label on Smoke Eater

4.3.2 During use (HEPA vacuums):

· Operate vacuum directly onto surface cleaning or point of dust capture.

· Do not open collection bag or HEPA filter (return to IH for maintenance).

· If dropped do not use; return unit to IH.

· Store HEPA vacuum parts (power cord, hoses, etc.) as appropriate for vacuum.

· Return HEPA vacuum to IH when work is complete.

· NOTE: IH HEPA vacuum must not be used in Radiologically Controlled Areas. Contact RADCON for assistance if HEPA vacuum is needed in a Radiologically Controlled Area.

4.3.3 During use (smoke eaters):

Abide by the following controls outlined in Table 5.

Table 5 - Portable Exhaust Ventilation Controls

Parameter	Control
Face Velocity	Maintain appropriate working capture distances.
Cross Drafts	Position material to minimize cross drafts.
Turbulence and/or Dead Spots	Minimize by: · Regulating face velocity. · Raising bulky objects off the work surface.
Capture Velocity	100% capture is required.
Body Positioning	Keep head and body out of the pathway between contaminant/condition and capture.
Personal Protective Equipment	Dependent on condition. See ES&H Manual Chapter 6620 Personal Protective Equipment Program for more information.

5.0 Reference(s):

· Industrial Ventilation, A Manual of Recommended Practice – 26th edition

6.0 Revision Summary

Revision 1.3 – 02/21/20 – Periodic Review; minor edits to Section 4.3.2 per CATS# STR-2019-10-06

Periodic Review – 06/08/18 – No changes per TPOC

Periodic Review – 06/08/17 – No changes per TPOC

Periodic Review – 04/11/16 – No changes per TPOC

Revision 1.2 – 04/08/15 – Periodic Review; minor edits with no substantive changes

Revision 1.1 – 09/04/13 – Periodic Review; Changed title to reflect content; updated flowchart; added examples to mitigation methods; added new process steps for HEPA vacuums/smoke eaters per J.Williams

Revision 1.0 – 08/11/11 – Updated to reflect current laboratory operations.

ISSUING AUTHORITY	TECHNICAL POINT-OF-CONTACT	APPROVAL DATE	REVIEW DATE (Annual Review Required)	REV.
ES&H Division	Jennifer Williams	02/21/20	02/21/21	1.3

This document is controlled as an on line file. It may be printed but the print copy is not a controlled document. It is the user’s responsibility to ensure that the document is the same revision as the current on line file. This copy was printed on 2/21/2020.