Ventilation for Painting in Enclosed Spaces Daniel O. Chute, CIH, - - PowerPoint PPT Presentation

Ventilation for Painting in Enclosed Spaces

Daniel O. Chute, CIH, CSP BSI EHS Services And Solutions Reston, Virginia Daniel.Chute@bsigroup.com 703-689-9482

2018 MCA Annual Seminar Nashville, TN July 29 – August 1, 2018

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Background

Ventilating Shipboard spray painting with portable blowers is problematic Many coatings systems have reactant materials with low exposure limits, so control to applicable limits in these conditions can be especially difficult Without good sampling information, it is difficult to ensure that the respirator is providing adequate protection for the broader range of potential airborne contaminants in these situations. Air sampling for these components is technically challenging/expensive for individual yards. A panel project with industry-wide participation would provide representative data that may be used by all shipyards to ensure current knowledge and application of best practices for health and safety management

Ventilation for Painting in Enclosed Spaces

NSRP RISK MANAGEMENT PANEL PROJECT, 2012-456

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Ventilation for Painting in Enclosed Spaces

Surface ships and submarines

Work included

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Ventilation for Painting in Enclosed Spaces Brush and spray applications Work included

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Ventilation for Painting in Enclosed Spaces

Ships afloat and subsections under construction

Work included

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Ventilation for Painting in Enclosed Spaces

Small tight compartments

Work included

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Large enclosed blast and paint facilities Ventilation for Painting in Enclosed Spaces Work included

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Ventilation for Painting in Enclosed Spaces

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Ventilation for Painting in Enclosed Spaces

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BAE Southeast Jacksonville, FL Huntington Ingalls Industries Newport News Shipbuilding Newport News, VA NASSCO San Diego, CA Norfolk Naval Shipyard Portsmouth, VA

Assistance with technical research, data analysis and periodic reviews

Navy and Marine Corps Public Health Center, Portsmouth, VA

Ventilation for Painting in Enclosed Spaces Shipyard Participants

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Project Overview

Shipboard painting often done in tight enclosed spaces.

The work is difficult to adequately ventilate for:

Effective control of visibility, Flammability and health hazards

This is due to:

Irregular space configurations, Limited access and egress A satisfactory staging area for fans and blowers A variety of paint application equipment and methods A complex variety of paint formulations and potential airborne contaminants

Work will frequently use moveable temporary shipboard ventilation systems

Ventilation for Painting in Enclosed Spaces

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Ventilation for Painting in Enclosed Spaces

Moveable temporary shipboard ventilation systems

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Project Overview

Fully enclosed blast and paint facilities have also been constructed in some shipyards.

Ventilation for Painting in Enclosed Spaces

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Ventilation for Painting in Enclosed Spaces

Project Overview

Spray application

• Requires continuous attention to the control of the work area and airflow

volumes.

• May produce reactant materials with very low exposure limits.

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Noise Control for Portable Ventilation Blowers Related Project

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Ventilation for Painting in Enclosed Spaces

Project Goals and Objectives

A. Define representative exposure conditions and control challenges encountered in effectively ventilating shipyard painting operations B. Collect representative air samples to define actual exposure conditions and effective control practices available to shipyards under several different combinations of coating application, space configuration and ventilation use. C. Prepare and present a report describing the areas evaluated, materials and equipment used and comparing the air sampling results to applicable Occupational Exposure Limits as a measure of effectiveness

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Ventilation for Painting in Enclosed Spaces Sampling Summary

Total Particulates 1-Butanol (n-Butyl Alcohol)

m-XDA Titanium Dioxide

Ethyl Benzene

Xylene

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Ventilation for Painting in Enclosed Spaces

Coatings Applied

FastClad

SeaGuard 5000 Intershield 300V

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Ventilation for Painting in Enclosed Spaces

Coatings Applied

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Ventilation for Painting in Enclosed Spaces

Coatings Applied

FastClad

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Ventilation for Painting in Enclosed Spaces

Coatings Applied

Intershield 300V

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Ventilation for Painting in Enclosed Spaces

Coatings Applied

SeaGuard 5000

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Ventilation for Painting in Enclosed Spaces

Coatings Applied

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Ventilation for Painting in Enclosed Spaces

Coatings Applied

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Ventilation for Painting in Enclosed Spaces

Ventilation in Use

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• Flexible exhaust duct
• Ship subsection in large enclosed, ventilated paint/blast facility

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Ventilation for Painting in Enclosed Spaces

*Following results reported directly to Shipyard Point of Contact *Data is “sanitized” for presentation and analysis

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Ventilation for Painting in Enclosed Spaces

a) Description of space or compartment to be painted b) Dimensions and volume of affected area c) Coating systems being applied d) Coating application method e) Number of painters in the affected space f) Description of tools and equipment in use g) Personal protective equipment in use h) Description of ventilation system(s) in use i) Airflow velocity (fpm) and volume (cfm) measured in the affected areas being painted j) Airborne contaminant measurements, both in laboratory reported units (ppm

• r mg/m3 of air, etc…) and, where

possible, expressed as a percentage of applicable Occupational Exposure Limit, such as PEL or TLV. k) Other work, activity or conditions in the vicinity of painting that may affect the measurement or later application of these results.

Field Work in Each Location

• Three days on site •Two days of Full Shift Air Sampling (Solvents/Solids)

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Ventilation for Painting in Enclosed Spaces

Organic Vapor Passive Air Monitoring Badges Active Monitoring for Particulates

Organic Vapor Passive Air Monitoring badge uses a single charcoal sorbent wafer for easy collection of organic vapors with analysis by gas chromatography.

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Multi-Function Ventilation Meter

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Entry No. Description of Space Estimated Size or Volume of Affected Space in ft3 Number of painters Application method Coating Products Applied Exposure Monitoring for Personal or Area Sample Air monitoring result Duration, Minutes OSHA PEL TWA for each contaminant tested ACGIH TLV * = Ceiling Limit TWA Result above or below PEL (8 hr) (+)or(-) Ventilation Methods Air fixture/inlet in work area Airflow in cfm Notes and comments Title Description 30 Ship Subsection 600,000 6 Spray Intershield 300V Total Particulate Personal 1.7 368 15mg/m3 1* 1.3 (-) Perimeter Push Pull NO/Side Walls Only 9750 Large, Sealed Blast & Paint Facility Mixer 31 LET Tank 200 1 Brush/ Roll F150 1-Butanol Personal 4.3ppm 110 100ppm 20ppm 1 (-) LEV 6" FlexDuct 600 Open Top, LET Tank, Removed from Ship, Painted in Shop NR 32 LET Tank 200 1 Brush/ Roll F150 1-Butanol Area 13ppm 111 100ppm 20ppm 3 (-) LEV 6" FlexDuct 600 Open Top, LET Tank, Removed from Ship, Painted in Shop NR 33 LET Tank 200 1 Brush/ Roll F153 1-Butanol Personal 4.9ppm 322 100ppm 20ppm 3.3 (-) LEV 6" FlexDuct 510 Open Top, LET Tank, Removed from Ship, Painted in Shop NR 34 LET Tank 200 1 Brush/ Roll F153 1-Butanol Area 8.1ppm 320 100ppm 20ppm 5.4 (-) LEV 6" FlexDuct 510 Open Top, LET Tank, Removed from Ship, Painted in Shop NR 35 VOID 175 2 Spray FastClad m-XDA Personal 0.15ppm 17 none 0.1ppm Ceiling Limit *0.15pp m (+) LEV 6" FlexDuct 106 New Construction Ship Subsection - IN Spray er 36 VOID 175 2 Spray FastClad m-XDA Personal <0.06ppm 17 none 0.1ppm Ceiling Limit *<0.06 (-) LEV 6" FlexDuct 106 New Construction Ship Subsection - OUT Helper 1*: 2013 ACGIH TLV, Appendix B, 3mg/m3 Respirable, 10mg/m3 Inhalable. Not compatible with OSHA

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FIELD TEST DATA

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Ventilation for Painting in Enclosed Spaces

Figure 8: Range of Volume - Enclosed Shipboard Ventilated Spaces

150 175 3200 175 200 200 1600 1800 1000 2000 3000 Shipboard Ventilated Spaces Cubic Feet

Range of Volume - Size of Ventilated Spaces 150 175 175 200 200 1600 1800 3200 1 2 3 4 5 6 7 8

* This excludes the Facility with 600,000

cubic feet of ventilated area.

Findings

• Ventilated work areas tested ranged from 150

ft3 to 600,000 ft3; A 4000-fold size difference!

• Control of airborne contaminants within OSHA

PEL limits is difficult- but often achievable

• Respirators, personal protective clothing and

equipment were observed to be used effectively where needed to control painters’ exposure below applicable OSHA limits

• Portable ventilation blower and flexible

ductwork performance was highly variable

• Fixed ventilation systems in enclosed blast and

paint buildings were observed to be more effective in preventing outdoor emissions than controlling interior breathing zone exposures

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Ventilation for Painting in Enclosed Spaces

Figure 14: Results by Compound - Xylene

13 79 281 447 6.7 153 120 115 116 95 100ppm = PEL, TLV 50 100 150 200 250 300 350 400 450 1 2 3 4 5 6 7 8 9 10 Sample # ppm

Samples

• f Xylene

PEL, TLV

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Ventilation for Painting in Enclosed Spaces

Figure 15: Results by Compound - Total Particulate

9.1 8.6 2.8 13 1.3 4.2 0.5 2.2 5.6 15 = PEL 10 = TLV, Inhalable 3 = TLV, Respirable 5 10 15 20 1 2 3 4 5 6 7 8 9 10 Sample # mg/m3 Samples of Total Particulate PEL TLV, Inhalable TLV, Respirable

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Ventilation for Painting in Enclosed Spaces

Figure 9: Air Exchange Rates

83.9 0.9 61.5 29.6 9.6 0.4 0.3 1.7 0.7 10 20 30 40 50 60 70 80 1 2 3 4 5 6 7 8 9

Ventilated Area Minutes

Air Exchange Rates # Area ft3 1 150ft3 2 175ft3 3 175ft3 4 200ft3 5 200ft3 6 1600ft3 7 3200ft3 8 600000ft3 9 600000ft3

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Ventilation for Painting in Enclosed Spaces

Inconsistent Performance and Maintenance

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Ventilation for Painting in Enclosed Spaces

Recommendations

• Periodically review and evaluate ventilation blowers and system

performance to ensure predictable and consistent airflow volumes

• Adopt and maintain equipment installation and maintenance procedures

to maximize system performance and minimize friction losses and leakage

• Ensure that painters and associated trades who require ventilation

understand and apply best practices for maximum benefit

• Evaluate the need and implement effective measures for supplemental

ventilation for breathing zone hazard control in enclosed blast and paint facilities

• Maintain flammable solvent concentrations well below the 10% LEL

and IDLH limits

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Ventilation for Painting in Enclosed Spaces

Complete Report Available Online 2012- Painting Ventilation Enclosed Spaces Final Report

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Ventilation for Painting in Enclosed Spaces

Any Questions ????????