Attachment_04g_2015_IHS_of_93111 _93112_and_93113_Shops.pdf

2015 PERIODIC INDUSTRIAL HYGIENE SURVEY

OF

93111, 93112 and 93113

AIRCRAFT AND POWER PLANT ENGINE/COMPONENT CLEAN SHOPS

INDUSTRIAL HYGIENE DEPARTMENT

NAVAL HEALTH CLINIC

CHERRY POINT, NC 28533-0023

Enclosure (1)

TABLE OF CONTENTS

Page

Executive Summary 3

Evaluation Summary 4

PPE Recommendation Summary 6

93111 Aircraft Clean Shop 7

Ventilation Tables 2.1 to 2.4 17

93112 Power Plant Engine Clean Shop 21

Ventilation Table 3 30

93113 Component Clean Shop 32

Ventilation Tables 4.1 to 4.6 42

Glossary of Terms Appendix A

Customer Satisfaction/Complaint Form Appendix B

EXECUTIVE SUMMARY

The periodic industrial hygiene survey of 93111, 93112 and 93113 was conducted by Mr. John Williams, Industrial

Hygienist, in December 2015. The purpose of the survey is to evaluate any changes to work processes or work practices that have occurred since our previous survey in 2014.

Shop 93111/2/3 cleans, strips, and blasts all aircraft and components prior to inspection and paint.

Areas of particular concern or Command interest are as follows:

1. Medical Surveillance: DODINSTS 6055.5 requires a registry of personnel occupationally exposed to hazardous chemicals, physical or biological agents to be developed for each workplace surveyed. This registry is used to ensure that each employee potentially exposed to a health hazard is enrolled in the appropriate medical surveillance program, and is examined by an occupational health physician, audiologist, or other health care provider to detect any insidious or acute ill effects. The FRC East Division Secretary will compile the registries and schedule the required medical surveillance physicals with the Naval Health Clinic Occupational Medicine Department.

2. Personal Protective Equipment (PPE): Adequate PPE is available to all personnel. The PPE was observed in a clean and usable condition and properly stored. Personnel receive PPE training. PPE listed under “Existing

Controls” for the work processes lists all PPE that may be worn. Please refer to the PPE Recommendations

Summary (Table 1) for PPE requirements we recommend.

3. Emergency Eyewash/Shower Stations: Pressurized plumbed eyewash stations are provided in all areas where required and have been properly maintained. Stations are identified with a highly visible sign.

4. Thermal Stress: Personnel are subject to thermal stress in the work spaces. Ensure all personnel are trained in thermal stress recognition and prevention. Contact the FRCE Safety Office if assistance is required.

5. Hearing Conservation Program: Changes to the Navy Hearing Conservation Program were announced through BUMED Note 6260, dtd 13 Dec 2012. Changes include the new Navy Occupational Exposure Limit for

Noise, set at 85 dB(A) with a 3 dB exchange rate, and the hearing protection device requirements have changed.

Hearing protective devices (HPD) are required to be worn by all personnel whenever they work inside and/or enter designated noise hazardous areas. Employees are required to wear single HPD while operating or are near tools and/or equipment, regardless of duration, that produce SPL between 85 and 96 dB(A). Double hearing protection is required when noise levels, regardless of duration, are between 96 and 100 dB(A). For sound pressure levels greater than 100 dB(A), double hearing protection is required with administrative controls to bring the effective exposure to less than an 8-Hr TWA of 85 dB(A).

6. Design Review: Industrial hygienists are required to actively participate in all facility planning, design, construction, and acceptance projects including both special and military construction projects to ensure appropriate hazard control techniques are applied. Please ensure all special projects, engineering designs, and purchasing contracts involving potential health hazards such as toxic materials, radiation, noise, or other health hazards are sent to the Industrial Hygiene Department for review.

7. Customer Satisfaction/Complaint Form: A customer satisfaction/complaint form is found in Appendix B of this report. Please complete this form as deemed necessary and return to the Naval Health Clinic Industrial Hygiene

Department Head.

This report reflects conditions and operations at 93111/2/3 during the survey period. Periodic Industrial Hygiene

Surveys are required for most work places by DODINST 6055.5 and OPNAVINST 5100.23G. In addition, changes in procedures, processes, or workload that may significantly alter personnel exposures require more frequent evaluations. Supervisory personnel should be encouraged to notify the FRCE Safety Office when significant changes occur.

EVALUATION SUMMARY

PERIODIC INDUSTRIAL HYGIENE SURVEY

93111, 93112, and 93113

Aircraft and Power Plant Engine/Component Clean Shops

New or Significantly Modified Work Center Operations/Processes?

No significant changes in operations/processes were identified. *

The following changes were identified:

*For purposes of this survey, “significant changes” are defined as workplace modifications that require a change in recommended medical surveillance enrollment, personal protective equipment, or exposure control measures (ventilation, etc.).

Program Findings and Recommendations

1. Medical Surveillance Program Status: Medical surveillance requirements are included in each shop section report to ensure Medical Surveillance Program enrollment(s) for applicable shop personnel. The FRC East Division Secretaries will compile registries and schedule the required medical surveillance physicals with the Naval Health Clinic Occupational

Medicine Department.

No Medical Surveillance is Recommended.

Medical Surveillance is Recommended.

No Change in Medical Surveillance Recommendations.

Medical Surveillance Recommendations have changed as follows:

2. Hazardous Material Control and Management (HMC&M) Program:

AUL Y N N/A Accurate Y N

MSDS Files Y N N/A Accurate Y N

HAZMAT Training Required? Y N (Note: IH does not track training completion).

Other (lead, asbestos, etc.): See Below. Y N

Comments: Shop personnel potentially exposed to harmful physical, biological, chemical agents and noted reproductive hazards and carcinogens are required to receive hazard training in accordance with OPNAVINST 5100.23G. Hazards and corresponding work tasks are identified in each shop assessment.

3. Management of Reproductive Hazards:

Reproductive Hazards Present? Y N

Any change from previous survey? Y N

Comments: Reproductive hazards identified by the Navy and Marine Corps Public Health Center (NMCPHC) have been identified in these shops. It is recommended that wherever possible the work center reduce, minimize, and/or eliminate the reproductive hazards and personnel exposure.

4. Noise and Hearing Conservation Program (HCP):

Are personnel recommended for the HCP? Y N

Are personnel receiving audiograms? Y N N/A (Note: IH does not track training completion)

Is hearing protection readily available? Y N N/A

Is hearing protection used? Y N N/A Not Available for Observation

Comments: All personnel in 93111, 93112, and 93113 are in the Hearing Conversation and Noise Medical Surveillance

Programs.

5. Respiratory Protection:

Are respirators used to control workplace exposures? Y N

Are they effective? Y N N/A

Is the Respiratory Protection Program satisfactory? Y N N/A

Comments: Respiratory protection is required for all walk-in blast operations. An FRCE safety representative manages the

Respiratory Protection Program including training, fit testing, and respirator selection requirements.

6. Ventilation:

Are ventilation systems used to control workplace exposures? Y N

Are the systems effective and operating properly? Y N N/A

Comments: Not all systems provide the minimum recommended capture velocity. Please refer to the ventilation tables located behind the individual shop hazard assessment. Contact Engineering to improve ventilation.

7. Ergonomics:

Ergonomic risk factors were identified pertaining to shop work office/computer work

Available equipment/furniture incorporates good ergonomic design? Y N N/A

Ergonomic training recommended? Y N (Note: IH does not track training completion)

Comments and/or Recommendations: Adjustable tables and adjustable chairs and stools were observed. Personnel are at risk of developing Work Related Musculoskeletal Disorders (WMSDs) as they are exposed to multiple risk factors including awkward postures, standing for long periods of time, and moderate vibration. Recommend all personnel receive ergonomics training including specific guidance identified in OPNAVINST 5100.23G, Ch. 23. Contact the FRCE Ergonomics Program

Manager for assistance with this training.

8. Other Applicable Programs:

Lead Control

Asbestos Control

Carcinogens

Other

Comments: Stressors identified as known or suspected carcinogens by the Occupational Safety and Health Administration

(OSHA), the National Toxicology Program (NTP), the International Agency for Research on Cancer (IARC), and the

American Conference of Governmental Industrial Hygienists (ACGIH) are noted throughout this report.

Consultative or Special Surveys/Findings Since the Previous Survey: (check if none)

Changes to Specific Workplace Evaluations and Monitoring Plan

1. Workplace Assessments:

No significant change to workplace assessment information was identified.

The following significant workplace assessment changes were identified:

Comments:

2. Exposure Assessment:

New exposure data were obtained since the prior evaluation and are summarized below.

No change in any exposure assessment was identified as part of the survey or from sampling data.

The following changes in exposure assessments were identified:

Comments: Personnel exceed the Permissible Exposure Limit (PEL) for hexavalent chromium and cadmium during walk-in blast operations. Semiannual monitoring is required.

3. Findings and Recommendations:

There were no significant findings identified during this survey that require corrective action.

The following significant findings were identified:

Comments:

4. Exposure Monitoring Plan. Required Exposure Monitoring requests are located in the report.

Exposure monitoring needs were identified.

No Exposure monitoring needs were identified.

There are no changes to the previous Exposure Monitoring Plan.

Comments: Please contact the Naval Health Clinic Industrial Hygiene office 466-4564 to schedule requested exposure monitoring identified in this report.

Table 1

PERSONAL PROTECTIVE EQUIPMENT (PPE) RECOMMENDATIONS SUMMARY

WORK PROCESS HEARING

PROTECTI

ON

FACE

AND/OR

EYE

PROTECTI

ON

CLOTHING

PROTECTI

ON

HAND

PROTECTI

ON

RESPIRATORY

PROTECTION

93111 MeCl

Aircraft and

Component

Stripping

Single Safety glasses w/face-shield if respirator not worn

Chemical resistant apron

Butyl rubber gloves over

Nitrile

Full-face supplied-air required for interior aircraft stripping; voluntary use for exterior and component stripping operations in well ventilated areas

93112 MeCl

Component

Stripping

Single Safety glasses with faceshield

Chemical resistant apron

Butyl rubber gloves

Not required

Glove Box Blasting Single Safety glasses Not Required Nitrile gloves Not required

Glove Box Blast

Collection Tray

Dump

Single Safety glasses Tyvek coveralls

Nitrile gloves Half-face Class 100

Walk-in Blasting Single N/A Tyvek coveralls

Cotton or

Nitrile gloves

Supplied-air hood

Walk-in Blasting

Cleanup

Single Safety glasses Tyvek coveralls

Cotton or

Nitrile gloves

Half-face Class 100

Corrosion Removal

Using Wire Wheels

Single Safety glasses Tyvek coveralls

Nitrile gloves Half-face Class 100

All other

Clean Operations

Single;

Double w/ compressed air use

Safety glasses w/face shield or safety goggles

Chemical resistant apron

Nitrile, Neoprene or

Otto Fuel

Gloves

Not Required

N/A – Not Applicable due to full-face respirator use

Protective footwear is required at all times.

Clothing Protection:

A chemical resistant apron worn over cloth coveralls is recommended to prevent/minimize skin contact with chemicals for work processes with splash hazards.

Tyvek coveralls worn alone during walk-in blast operations provide adequate protection to prevent/minimize skin contact with dusts. Cloth coveralls alone do not offer the same level of protection against particulate hazards; we recommend Tyvek coveralls over cloth coveralls during walk-in blast operations if wearing cloth coveralls is desired.

Note: PPE requirements are located in the shop hazard assessment.

INDIVIDUAL HAZARD ASSESSMENT DATE: December 2015

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93111 Aircraft Clean Shop

Bldg: 137, 3766, & 4034

Supervisor: Mark Karam

Phone: 464-7923

Total Personnel: 20 M/F: 20/0

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal operations on aircraft and components.

Personnel rotate through the various work processes identified below.

-Work processes are organized by location.

WORK PROCESS

HEALTH HAZARDS/ STRESSORS

FREQ/

DURA-

TION

NO.

OF

PERS

CONTROLS

EXPOSURE

ASSESSMENT

Operating Noise Hazardous

Equipment (Abrasive Blasting &

Pressure Spray)

Noise

7 hrs/ shift/

20 Earplugs and/or muffs UNACCEPTABLE: Based on previous noise sampling data

Personnel working with noise hazardous equipment or in designated noise hazardous areas should continue wearing appropriate hearing protection.

Continue enrollment of all personnel in the Noise Medical

Surveillance Program.

Chemical Paint Stripping Operations

Aircraft/components are stripped of paint in the Strip Barn (Bldg. 137) using a benzyl alcohol stripper. Benzyl alcohol stripper is initially mechanically sprayed on aircraft/components.

-Methylene chloride (MeCl) mild stripper use on aircraft has dramatically decreased since 2006 due to benzyl alcohol substitution and since the majority of the workload has been over-paints instead of full-paints.

Mild Stripper (Cee-BeeA-292):

Methylene Chloride, Toluene*, Ethanol, Methanol

3-4 aircraft/ month/

4 workers/

8-16 shifts/ aircraft components

3-4 days/week/ workers/6-7 hrs/shift

20 Full-face airline respirator, OV full-face or half-face respirator, faceshield, Tyvek coveralls, nitrile/butyl rubber/neoprene gloves, steel toe rubber boots, exhaust (dilution) ventilation

UNACCEPTABLE:

It is IMPERATIVE that personnel never conduct MeCl pump spray operations since compliance controls per 29 CFR

1910.1052 have been lifted.

Since Silver Shield gloves are never worn during MeCl stripping operations, personnel should always be double-gloved during MeCl strip operations.

Additionally, personnel should remove/replace the outer gloves with a clean pair at least every hour if they become contaminated.

If respiratory protection is not worn during MeCl stripping operations, ensure a faceshield is worn to minimize facial skin contact.

Ensure the doors to the Strip

Barn are closed for optimum

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93111 Aircraft Clean Shop

Bldg: 137, 3766, & 4034

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal operations on aircraft and components.

FREQ/

DURA-

TION

NO.

OF

ventilation performance during

MeCl stripping operations.

-Continue enrollment of personnel in the Respirator User

Medical Surveillance Program.

Spraying Wheel Well (Flat Well)

Cleaner/Degreaser

Personnel mechanically pump spray degreaser on aircraft and components during induction cleaning. The aircraft is then steam cleaned with detergent after a dwell time and rinsed with water.

Aliphatic Hydrocarbons (MIL-PRF-

85570, TYPE V)

Skin and eye irritation

Daily/10-15 min. spray time/

15 min.-

2-3 hrs dwell

20 Chemical splash goggles, safety glasses w/faceshield, cotton coveralls, Tyvek coveralls, nitrile gloves, steel toe rubber boots, exhaust (dilution) ventilation

ACCEPTABLE: Based on existing controls and PPE use.

Spraying 62-SD Corrosion Removing

Compound Type I (“Cleaner

Brightener”)

Personnel dilute one, five-gallon can of corrosion removing compound (a phosphoric acid based solution) with water (1:5) in a 30-gallon drum.

Personnel then mechanically pump spray the solution on the bare metal of aircraft and components after cleaning operations have taken place. The solution is rubbed into the aircraft during the 15 min. wait time using cleaning pads attached to a broom handle and then rinsed off with water.

-Full-face protection is worn during the pump spray step.

3-4 times a week/

20-30 min.

/aircraft

20 Chemical splash goggles, safety glasses w/faceshield, cotton coveralls, Tyvek coveralls, nitrile gloves, steel toe rubber boots, half or full-face negative pressure particulate (P100) respirators, exhaust(dilution)

ACCEPTABLE:

Respiratory protection is not required based on current air sampling results; however, respirators are recommended due to the irritant nature of the solution.

Initial exposure monitoring was conducted 02 August 2000 (Log

#s 00-0985-0989). Results for phosphoric acid were below the

PEL and AL. Respiratory protection is not required based on current air sampling results;

however, respirators are recommended due to the irritant nature of the solution.

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93111 Aircraft Clean Shop

Bldg: 137, 3766, & 4034

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal operations on aircraft and components.

FREQ/

DURA-

TION

NO.

OF

Continue enrollment of

Medical Surveillance Program.

Alodine Corrosion Resistant

Treatments

Alodine T 5900 RTU (Chromium hydroxide sulfate <1%)

Alodine 1201 (MIL-C-5541, <1% chromic acid)

Alodine is applied to aircraft/components to provide corrosion resistance prior to paint. Alodine T 5900 RTU is applied to aircraft/components using a pump spray method for 5-15 minute application time.

Aircraft and components both have a 10-minute dwell time after application.

After dwell time, aircraft/components are rinsed off with water.

CH-46 A/C rails are cleaned with soapy water and then bottle sprayed with

Alodine 1201 (10 minutes max), or the

Alodine 1201 is sprayed on cheesecloth and wiped on the rails.

3-4 times/week/

1 hour

20 Chemical splash goggles, safety glasses w/faceshield, nitrile gloves, cotton coveralls, Tyvek coveralls, steel toe rubber boots, exhaust (dilution)

Overexposures are not expected based on short duration, <1% chromic acid in Alodine 1201, and excellent natural/general ventilation. Respiratory protection is not required.

Personnel should continue wearing the listed PPE to prevent skin and eye contact. If inhalation irritation occurs, personnel should wear a NIOSH certified particulate respirator for voluntary use.

Hexavalent chromium compounds are known human carcinogens.

Alodine may cause irritation to the skin and eyes.

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93111 Aircraft Clean Shop

Bldg: 137, 3766, & 4034

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal operations on aircraft and components.

FREQ/

DURA-

TION

NO.

OF

Cleaning Operations

Personnel mop clean a detergent and water based solution on aircraft prior to

Final Finish. Isopropyl alcohol is sprayed on and scrubbed using cheesecloth or a wire brush to remove tape and glue residue.

A 55-gallon drum of MIL-PFR-680 is used to degrease/clean hubs. A hoist is provided for lifting. Soak time on average is 10-15 minutes. A wire brush is used when needed. Compressed air is used to dry. If hub is going to NDI, a

MIL-PRF-680 film is sprayed.

A/C Cleaning Compound (MIL-PRF-

85570D, TYPE II): Aliphatic Petroleum

Hydrocarbon, Solvent Naphtha;

Isopropyl Alcohol 99%; MIL-PRF-680;

Skin irritation

Daily/6 hrs/shift

1/2 hr/aircraft

(alcohol use)

20 Chemical splash goggles, safety glasses w/faceshield, nitrile gloves, cotton coveralls, Tyvek coveralls, chemical splash apron, steel toe rubber boots, earplugs, dilution

Due to short duration, small quantities of alcohol used, and sampling conducted on similar operations well below the AL, no over-exposures are expected and respiratory protection is not required.

Based on short duration and dilution ventilation, overexposures are not expected and respiratory protection is not required for MIL-PFR-680 use.

The primary industrial hygiene concern with this operation is skin irritation. The listed PPE is adequate when worn to prevent skin and eye contact.

New Plastic Media Blast (PMB)

Facility

(Bldg. 4034)

Aircraft (H-53, H-46, UH-1, AH-1) and large components are blasted in the PMB hangar (Bldg. 4034). Inhalation hazards in this operation are exposures to nuisance dusts, lead, cadmium, and hexavalent chromium compounds.

6 hrs/shift/ intermittent

2-3 times per week

20 3M blasting hood w/continuous supplied-air, Tyvek coveralls, cloth coveralls, cotton gloves, steel toe safety shoes, earplugs, ventilated hangar

UNACCEPTABLE: CEM

results for cadmium and chromium VI continue to exceed the PEL.

Per 29 CFR 1910.1025 and 29

CFR 1910.1027 (OSHA Lead and Cadmium Standards), assure that employees do not enter the clean change room and break room with protective work clothing or equipment unless

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93111 Aircraft Clean Shop

Bldg: 137, 3766, & 4034

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal operations on aircraft and components.

FREQ/

DURA-

TION

NO.

OF

Exhaust ventilation measurements were taken and found to be adequate to maintain operator visibility and to control escape of contaminants into adjacent work areas (see Table 2.2).

Supplied-air blasting hoods are required during abrasive blast operations.

Lead*, Cadmium*, Chromium VI, Nuisance Particulates, Noise

Cadmium and hexavalent chromium carcinogens. Lead is reasonably anticipated to be a human carcinogen.

surface dust has been removed by HEPA vacuuming or some other method without dispersing

it. Additionally, contaminated surfaces in the clean change room and break room should be cleaned by vacuuming or other methods that minimize the likelihood of the dust becoming airborne.

Assure employees wash their hands and faces prior to eating, drinking, smoking, chewing tobacco or gum, or applying cosmetics.

personnel in the Respirator User, Cadmium, and Chromic

Acid/Chromium VI Medical

Surveillance Programs based on current and past overexposures.

CEM is required semiannually to track exposure variables and review hygiene and medical surveillance requirements.

While lead is still detectable and a potential hazard during walk-in abrasive blast operations, CEM results have not exceeded the AL since 2007. Blasters no longer require enrollment in Lead

Medical Surveillance Program.

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93111 Aircraft Clean Shop

Bldg: 137, 3766, & 4034

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal operations on aircraft and components.

FREQ/

DURA-

TION

NO.

OF

Media Addition & PMB Cleanup

Personnel pour new media through the grates. HEPA vacuums are used to remove spent blast media from the interior of the aircraft. Compressed air is used to blow down components to remove spent media in inaccessible areas. Personnel sweep and occasionally use compressed air to move spent blast media into the grates that surround the concrete pad.

-Blasting helmets are worn when using compressed air during cleanup. Half-face respirators with P100 filters are used during sweeping and vacuuming operations.

carcinogens. Lead is reasonably anticipated to be a human carcinogen.

1-1.5 hr/ combined time b/w

2-4 employees

20 Safety glasses w/sideshields, Tyvek coveralls, cotton gloves, steel toe safety shoes, 3M blasting helmet w/continuous supplied-air, half-face P100 respirators, earplugs, blast facility

UNACCEPTABLE based on potential to exceed results for cadmium and chromium VI.

Respiratory protection is required based on the potential to exceed the AL. Based on current air sampling results, personnel may downgrade to half-face

P100 respirators and safety glasses w/sideshields during cleanup.

Ensure personnel wear the listed

PPE.

Per 29 CFR 1910.1025 (OSHA

Lead Standard), “Floors and other surfaces where lead accumulates may not be cleaned by the use of compressed air.” In addition, “Shoveling, dry or wet sweeping, and brushing may be used only where vacuuming or other equally effective methods have been tried and found not to be effective.”

Glass Bead Blast (GBB) Operations

(Bldg. 3766)

Personnel perform GBB operations on the exterior of H-53s, H-46s, large

Up to 6 hrs/shift/ intermittent

20 3M blasting hood w/continuous supplied air, half-face particulate respirator, Tyvek

UNACCEPTABLE:

CEM results for cadmium and

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93111 Aircraft Clean Shop

Bldg: 137, 3766, & 4034

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal operations on aircraft and components.

FREQ/

DURA-

TION

NO.

OF

components, and some AH-1s and UH-

1s. Interior aircraft GBB operations are less frequently conducted since the amount of corrosion does not normally warrant being blasted.

Compressed air is used to remove dust during cleanup.

Personnel have not removed smeared lead from P-3 Blade Taper Bores since the 2008 IH survey.

carcinogens. Lead is reasonably anticipated to be a human carcinogen.

coveralls, cotton gloves, steel toe safety shoes, safety glasses w/sideshields, earplugs

Supplied-air blasting hoods are required during abrasive blast operations.

While lead is still detectable and a potential hazard during walk-in abrasive blast operations, CEM results have not exceeded the AL since 2007. Blasters no longer require enrollment in the Lead

During the final stages of cleanup, personnel may down-grade to half-face P100 respirators and safety glasses w/sideshields only after the bulk of the cleanup is complete.

other surfaces where lead accumulates may not be cleaned by the use of compressed air.” In addition, “Shoveling, dry or wet sweeping, and brushing may be used only where vacuuming or other equally effective methods

Cadmium, and Chromic

Acid/Chromium VI Medical

Surveillance Programs.

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93111 Aircraft Clean Shop

Bldg: 137, 3766, & 4034

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal operations on aircraft and components.

FREQ/

DURA-

TION

NO.

OF

Corrosion Removal Using Wire

Wheels

(Bldg. 137 – Strip Barn)

Personnel spot remove minor corrosion using pneumatic wire wheels during

Final Clean when corrosion is found.

This process normally lasts <10 minutes.

carcinogens. Lead is reasonably anticipated to be a human carcinogen

<10 mins/ rarely done

20 Half-face P100, nitrile gloves, safety shoes, safety glasses w/sideshields, Tyvek coveralls, earplugs

UNCERTAIN: Based on short duration and infrequency of operation, overexposures to cadmium and chromium VI dusts are not expected. Respiratory protection should be worn since this process has not been sampled to quantify exposure due to non-routine work practice.

wearing the listed PPE.

Continue enrollment in the

Respirator User Medical

Recommendations:

-Personnel are expected to routinely exceed the 8-hour TWA for noise. Hearing protection is required in designated noise hazardous areas. Continue enrollment of all employees noted in report in Noise Medical Surveillance Program (503). Continue enrollment of all noted employees in Medical Surveillance Programs: Respirator Use (716), Isocyanates (196), Chromic

Acid/Chromium IV (133), and Cadmium (124).

POTENTIAL REPRODUCTIVE HAZARDS

Potential Hazard *M/F/D Operation Duration

Lead M/F/D Blasting operations 6 hrs/shift

Cadmium M/D Blasting operations 6 hrs/shift

Toluene D MeCl Chemical Stripping varies

* M=Male/F=Female/D=Developmental

*The asterisked potential health hazard(s) has been classified as a known occupational reproductive hazard in NEHC-

TM-OEM 6260.01A, April 2006. Work practices to minimize employee exposures to the asterisked stressors should be followed to the maximum extent practicable. Individuals with questions concerning reproductive issues are encouraged to consult with Naval Health Clinic Cherry Point, Occupational Medicine Department physician or private physician.

RECOMMENDED MEDICAL SURVEILLANCE PROGRAMS

Recommended Program Work Operation # Emp. Rationale

#503 - Noise Blasting, Sweeping, A/C

Washing, Spray Cleaning

All Exceeds NOEL for noise

#716 - Respirator User Chemical Stripping, Blasting, Corrosion Removal Using

Wire Wheels

20 Required program

#133 - Chromic Acid/

Chromium VI

Blasting 20 Compliance

#124 - Cadmium Blasting 20 Compliance

EXPOSURE ASSESSMENT

Are employees potentially exposed to toxic chemicals or hazardous physical agents?

Yes X No__

If no, provide rationale:

COMPLIANCE EXPOSURE MONITORING DATA

Organization: FRCE 6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop (WC)/Code: 93111 Aircraft/Component Clean, Strip, & Corrosion Control Shop/Bldgs. 3766

& 4034

Supv./Phone: Mark Karam/7923

Date/Type/IH: December 2015/Periodic/John Williams

Operation Potential Hazard # Samples Sample

Location

Method Sample

Freq

ManH r/Year

GBB Aircraft &

Components

(Bldg. 3766)

Cadmium

CrVI

Lead

1 worker BZ F 2 16

PMB Aircraft &

Components

(Bldg. 4034)

Cadmium

CrVI

Lead

1 worker BZ F 2 16

*If exposure monitoring is required, contact the Naval Health Clinic, Industrial Hygiene Department (ext.

2441/4564), prior to the next evolution of the above operations for evaluation/sampling.

Table 2.1

INDUSTRIAL HYGIENE DEPARTMENT

NAVAL HEALTH CLINIC, CHERRY POINT, NC 28533-0023

VENTILATION HOOD/SYSTEMS EVALUATION

Activity:

FRCE Supv./Phone: Mark Karam/7923 Log # 15-0246

SECTION I – HOOD/SYSTEM LOCATION

Shop:

93111 Aircraft Clean Shop

Bldg. 137

SECTION II – INSTRUMENTATION

Make:

TSI

VelociCalc

Model: 9535 Calibration Date: Jan. 2015

SECTION III – HOOD SYSTEM/EVALUATION (STRIP BARN)

Contaminant(s) Controlled: Methylene Chloride, Phosphoric Acid, Chromic Acid, etc.

MEASUREMENTS

HOOD # DIMENSIONS

(FT)

AREA

(SQ FT)

CAPTURE

VELOCITY

(FPM)

RECOMMENDED

CAPTURE

VELOCITY (FPM)*

AIR CURRENT

SMOKE

EXHAUST

Strip

Barn

167 x 120 20040 80 50-100 N/A

SECTION IV - COMMENTS: *Recommended capture velocity, per ACGIH Ventilation Manual, with contaminant released with practically no velocity into quiet air. Twelve cross sectional readings were taken approximately 5’ up from floor with the hangar doors closed. This is a large hangar bay and the ventilation system provides dilution ventilation.

Ventilation meets recommended capture velocity.

Surveyed by: John Williams Date: December 2015

Table 2.2

INDUSTRIAL HYGIENE DEPARTMENT

FRCE Supv./Phone: Mark Karam/7923 Log # 15-0247

Bldg. 4034

SECTION III – HOOD SYSTEM/EVALUATION (New PMB Facility)

Contaminant(s) Controlled: Lead, Cadmium, Chromium, Chromates, etc.

SYSTEM DIAGRAM

(Not to scale)

HOOD # DIMENSIO

NS

(FT)

AREA

(SQ FT)

CAPTURE

VELOCITY

(FPM)

RECOMMEND

ED CAPTURE

VELOCITY

*(FPM)

SMOKE TUBE

Hangar 70 x 65 4550 100 100 N/A

SECTION IV - COMMENTS: *Recommended crossdraft capture velocity, per ACGIH Ventilation Manual. This system is adequate to maintain operator visibility and to control escape of contaminants into adjacent work areas.

Appropriate NIOSH certified respiratory protection must still be worn. Ventilation meets recommended capture velocity.

Concrete

Pad where aircraft sits

Table 2.3

INDUSTRIAL HYGIENE DEPARTMENT

FRCE Supv./Phone: Mark Karam/7923 Log# 15-0248

Bldg. 3766

SECTION III – HOOD SYSTEM/EVALUATION (Corrosion Barn)

(FT)

AREA

(SQ FT)

CAPTURE

VELOCITY

(FPM)

RECOMMENDED

CAPTURE

VELOCITY

*(FPM)

SMOKE

TUBE

GBB

Hangar

54x16 864 88 100 Fair

SECTION IV - COMMENTS: *Recommended crossdraft capture velocity, per ACGIH Ventilation Manual to maintain operator visibility and to control escape of contaminants into adjacent work areas. Appropriate NIOSH certified respiratory protection must still be worn. Ventilation is slightly below recommended capture velocity.

FILTERS

Table 2.4

INDUSTRIAL HYGIENE DEPARTMENT

FRCE Supv./Phone: Mark Karam/7923 Log# 15-0249

Bldg. 133

SECTION III – HOOD SYSTEM/EVALUATION (Outside Walk-In Blasting Booth)

(FT)

AREA

(SQ FT)

CAPTURE

VELOCITY

(FPM)

RECOMMEND

ED CAPTURE

VELOCITY

*(FPM)

SMOKE TUBE

65923-

082892

10x30 300 123 100 N/A

SECTION IV - COMMENTS: *Recommended crossdraft capture velocity, per ACGIH Ventilation

Manual to maintain operator visibility and to control escape of contaminants into adjacent work areas.

Appropriate NIOSH certified respiratory protection must still be worn. Ventilation meets recommended capture velocity.

FILTERS

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93112 Power Plant Engine Clean Shop

Bldg: 133

Supervisor: Rickie Newsome

Phone: 464-7906

Total Personnel: 17 M/F: 16/1

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal on engine and transmission components.

FREQ/

DURA-

TION

NO.

OF

Operation of Noise Hazardous

Equipment

Personnel work in designated noise hazardous areas. Noise hazardous tools and equipment are labeled with

NAVMED 6260 series Noise Hazardous

Warning Decals. Personnel are expected to routinely exceed the 8-hour TWA of

85 dBA for noise.

7 hrs/shift All Earplugs and/or

UNACCEPTABLE: Noise designated noise hazardous areas should continue wearing appropriate hearing protection.

Continue enrollment of all personnel in the Noise Medical

Engine Clean Line

There are a total of nine 2,350-gallon tanks, 6 chemical and 3 water rinse tanks. Steel engine parts are cleaned in a series of vented chemical tanks. The 1st stage tank is dedicated to seremetel coated parts only.

Personnel are potentially exposed to chemical contents when loading and unloading components, taking weekly lab samples, and adding chemicals from a 55-gallon drum using a pump/hose.

Parts remain in tanks for approximately

30-45 minutes and during this time tanks are covered. Parts are rinsed in between chemical tanks. Two overhead 1-ton hoists are used to place loads into the tanks.

Noise ranging from 90 to 110 dBA is generated when parts are dried off with compressed air.

Alkaline Descaler T4181-L Rust

Remover: water, sodium hydroxide, triethanolamine, sodium gluconate (50%)

5 hrs/shift/ intermittent

17 Nitrile gloves, Otto fuel gloves, Tyvek coveralls, chemical resistant aprons, chemical splash goggles, safety glasses w/faceshield, steel toe rubber boots, local exhaust ventilation, earplugs

ACCEPTABLE

Due to some exhaust ventilation, short duration of time spent over open tanks, and work practices, inhalation overexposures are not expected. Respiratory protection and chemical medical surveillance are not required.

PPE is adequate to prevent skin and eye contact. Ventilation should still be improved.

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93112 Power Plant Engine Clean Shop

Bldg: 133

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal on engine and transmission components.

FREQ/

DURA-

TION

NO.

OF

Alkaline Cleaner T4338L: sodium hydroxide and water

Sodium Permanganate Cleaner T4338L

Scale-Gone #5 Descaler: ammonium hydroxyacetate, ammonium citrate, hydroxyacetic acid, N-N-diethylhydroxylamine

Liquid Alkaline Cleaner Rust Bloc

M5941: proprietary ingredient, tetrapotassium pyrophosphate, molybdenum

Varsol Spray Booths & Parts

Washers

Personnel clean small components using high-pressure varsol spray in three glove box units (1 in Big Shop; 2 in Small

Shop). The vented (non-glovebox) spray booth located in the Small Shop is no longer used by 93112 personnel.

One small automated parts washer is located in the Small Shop and two large parts washers are located in the Big

Shop. This part washes formerly used

Daraclean 282 but have been replaced with Ardrox 6333A,which is a potassium hydroxide based detergent.

Varsol spray and a 225-gallon dip tank are used to clean and flush oil passages from transmission gearboxes.

Up to 7 hrs/ shift

17 Nitrile gloves, green fuel gloves, chemical resistant aprons, cotton coveralls, Tyvek jacket, chemical splash goggles, safety glasses w/face shield, steel toe rubber boots, exhaust ventilation, Exposure monitoring (EM) was conducted on 11 May 2004 (Log

#s 04-0393-0394) in the Small

Shop prior to acquiring glove box units. Results for Stoddard solvent were below applicable standards. Overexposures are not expected during manual varsol spray operations based on exhaust ventilation, sampling results, and PPE worn.

Respiratory protection and chemical medical surveillance are not required.

Noise dosimetry was conducted on 6 May 2004 (log #s 04-0389-

0390). Results for noise exceeded the NOEL (Navy

Occupational Exposure Limit).

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93112 Power Plant Engine Clean Shop

Bldg: 133

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal on engine and transmission components.

FREQ/

DURA-

TION

NO.

OF

PPE worn consisted of disposable earplugs.

Compressed air was used to dry components. Sound levels exceeded 104 dBA. Single hearing protection is adequate when spraying varsol. Double hearing protection is required when sound levels, regardless of duration, exceed 104 dBA.

Ensure personnel wear a combination of insert type and circumaural types of hearing protection when using compressed air to dry components. Continue enrollment of personnel in the

Noise Medical Surveillance

Program.

Ultrasonic Cleaning Tanks

Envirosolv 654CR solvent (VOCs)

Out of Service

Ultrasonic Cleaning Tanks have been out of service for the past year. Contact Industrial

Hygiene for reassessment before using again.

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93112 Power Plant Engine Clean Shop

Bldg: 133

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal on engine and transmission components.

FREQ/

DURA-

TION

NO.

OF

Glove Box Blasting

Six glove box blast units are located in the Big Shop, which include one aluminum oxide, two glass bead, two plastic media, and a new “magic blast” media unit. This new media removes resin from gearboxes vice having the components chemically stripped in the ethanolamine tank in Bldg. 137.

All blasting machines are used on a continuous basis. All machines are labeled noise hazardous and operators were observed wearing hearing protection.

Nickel, Zinc, Nuisance Particulates, 7 hrs/shift 17 Safety glasses w/side shields, steel toe safety shoes, Tyvek coveralls, cotton gloves, nitrile gloves, half-mask

P100 filter respirator, earplugs

Air sampling was conducted on

February 1998 (Log #s 98-0103-

0106) during glass bead and aluminum oxide blasting operations. Results for lead, cadmium, chromium metal, nickel, and nuisance dusts were well below the PEL and AL.

Based on historical air sampling data and enclosed methods, respiratory protection and chemical medical surveillance are not required during glove box blasting operations.

Outside Walk-In Blast Booth

New blast booth was installed during

May 2011 timeframe and has been in use beginning in 2015. The booth uses both

“magic” and plastic media.

carcinogens. Lead is reasonably anticipated to be a human carcinogen

2 hrs/ shift/

17 3M blast hood w/continuous supplied air, Tyvek coveralls, gloves, local exhaust ventilation, earplugs

UNACCEPTABLE: CEM

results for cadmium and other surfaces where lead accumulates may not be cleaned by the use of compressed air.” In addition, “Shoveling, dry or wet sweeping, and brushing may be used only where vacuuming or other equally effective methods

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93112 Power Plant Engine Clean Shop

Bldg: 133

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal on engine and transmission components.

FREQ/

DURA-

TION

NO.

OF

-Personnel may use half mask particulate-filter respirators and safety glasses with side shields during cleanup only.

Cadmium, and Chromic

Acid/Chromium VI Medical

CEM results

Steam Rack

The steam rack is located outside the building across from the walk-in PMB booth. Steam from the station’s steam lines is used for cleaning inside the open-end garage. Two glove box soda blasters

(40-50 psi) and two manual soda spray units (1000-1400 psi) provide additional cleaning with wet sodium carbonate. A

1000-lb hoist is provided.

Aircraft Cleaner Type II: hydrocarbons;

Sodium Carbonate; Noise

7 hrs/shift/

17 Chemical splash goggles, safety glasses w/faceshield, cotton coveralls, plastic aprons, nitrile gloves, Otto fuel gloves, steel toe rubber boots, natural

Due to excellent natural ventilation, inhalation exposures are not expected. PPE is adequate when worn to prevent skin and eye contact.

Respiratory protection and

Floor coated with anti-slip coating due to personnel concern regarding floor slipperiness.

wearing the above listed PPE.

Hydrofluoroether Vapor Degreasing

(HFE-72DE Cleaning Compound)

The vapor degreaser removes oils from

93202 metal spray components. The

2-3 hrs/shift/ intermittent

17 Safety glasses w/side shields, face shield, Otto fuel gloves, steel toe rubber boots, general

Due to dilution ventilation and cooling coils that minimize the vapors from rising into the

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93112 Power Plant Engine Clean Shop

Bldg: 133

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal on engine and transmission components.

FREQ/

DURA-

TION

NO.

OF

degreaser is a two-sided tank heated between 114-116 F with the same chemical contents on both sides.

Components laden with heavy greases/oils are placed in a basket and dipped/submerged on the “dirty” right side for 20 minutes, submerged on the left “clean” side for 10 minutes, and then raised into the vapor zone to dry and drain for 15 minutes.

Components having only light oils are placed in a basket and lowered above the chemical line in the vapor zone and cleaned for 20 minutes, submerged on the clean side for 10 minutes, and then

Methyl nonafluoroisobutylether, Methyl nonafluorobutyl ether ventilation, cooling coils, earplugs employee’s breathing zone, inhalation exposures are not expected. HFE-72DE can irritate skin and eyes if contact occurs.

Personnel add one 55-gallon drum of chemicals approximately every three months. Chemicals are pumped from the drum with a hose into the left side of the tank and overflows to the right side.

Approximately every 2 years, a complete build-up is required that consists of adding 12, 55-gallon drums.

Based on PPE worn, pump additions, cooling coils, and good general ventilation, overexposures are not expected.

Respiratory protection is not required.

Recommendations:

- Personnel are expected to routinely exceed the 8-hour TWA for noise. Hearing protection is required in designated noise hazardous areas. Continue enrollment of all employees noted in report in Noise Medical Surveillance Program (503). Continue enrollment of all noted employees in Medical Surveillance Programs: Respirator Use (716), Isocyanates (196), Chromic

Acid/Chromium IV (133), and Cadmium (124).

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93112 Power Plant Engine Clean Shop

Bldg: 133

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal on engine and transmission components.

FREQ/

DURA-

TION

NO.

OF

EXPOSURE CODES:

ACCEPTABLE – ONE WHERE THE IH WILL NOT EXPECT THE SEG TO BE EXPOSED ABOVE THE

SELECTED OEL.

UNCERTAIN – ADDITIONAL DATA NEED TO BE COLLECTED TO CLARIFY THE EXPOSURE ASSESSMENT. THE

IH SHOULD MAKE AN INTERIM EXPOSURE ASSESSMENT BASED ON OBSERVATION OF THE PROCESS AND/OR

PROFESSIONAL JUDGMENT.

UNACCEPTABLE – ONE WHERE THE IH WILL EXPECT THE SEG TO BE EXPOSED ABOVE THE SELECTED OEL.

SKIN – THE MATERIAL POSES A SKIN ABSORPTION HAZARD

REPRODUCTIVE HAZARD – THE MATERIAL IS A NAVY-RECOGNIZED REPRODUCTIVE HAZARD

CARCINOGEN – THE MATERIAL CONTAINS > 0.1% OF AN OSHA, ACGIH, IARC, OR NTP-RECOGNIZED

CARCINOGEN

Lead M/F/D Blasting operations 5-6 hrs/day

Cadmium M/D Blasting operations 5-6 hrs/day

*The asterisked potential health hazard(s) has been classified as a known occupational reproductive hazard in NEHC-TM-OEM 6260.01A, April 2006. Work practices to minimize employee exposures to the asterisked stressors should be followed to the maximum extent practicable. Individuals with questions concerning reproductive issues are encouraged to consult with Naval Health Clinic Cherry Point, Occupational Medicine

Department physician or private physician.

#503 - Noise Blasting & Parts Cleaning All Exceeds 85 dBA TWA for noise >30 days/year

#716 - Respirator User Walk-In PMB; Dump spent media from glove box collection trays

17 Required Program

#133 - Chromic Acid/

Chromium VI

Walk-In PMB 17 Compliance

#124 - Cadmium Walk-In PMB

17 Compliance

Shop (WC)/Code: 93112 Power Plant Engine Clean Shop/Bldg. 133

Supv./Phone: Rickie Newsome/7906

Operation Potential Hazard #

Samples

Sample

Location

Method Sample

Freq

ManH r/Year

PMB Components

(Walk-In Blast Booth)

*Compliance

*Cadmium

*CrVI

1 worker BZ F 2

I=Intermittent DR=Direct Reading BZ=Breathing Zone HZ=Hearing Zone

C=Continuous BI=Bubbler/Impinger PD=Personal Dos. AT=Adsorption Tube

Y=Yes/N=No IT=Indicator Tube GA=General Area SZ=Source Zone

F=Filter O=Other

*If exposure monitoring is required, contact the Naval Health Clinic, Industrial Hygiene Department (ext.

Table 3

INDUSTRIAL HYGIENE DEPARTMENT

FRCE Supv./Phone: Rickie Newsome/7906 Log # 15-0249/54

93112 Power Plant Engine Clean Shop Bldg. 133

Model: 9535 Calibration Date: Sept. 2015

SECTION III – HOOD SYSTEM/EVALUATION (ENGINE CLEAN LINE/PUSH-PULL)

Contaminant(s) Controlled: see table

TANK

TANK USAGE TANK CONTENTS EXHAUST

FLOW

RATE

(ft/min)

RECOMMENDED

EXHAUST FLOW

RATE

(ft/min)*

AIR

CURRENT

SMOKE

EXHAUST

st

Stage

F

Alkaline

Descaler T4181-

L Rust Remover water sodium hydroxide triethanolamine sodium gluconate(50%)

Out of

Service

N/A N/A nd

Stage1

88F

Alkaline

Descaler T4181-

L Rust Remover water sodium hydroxide triethanolamine sodium gluconate(50%)

50 100 Fair th

89F

Alkaline

Cleaner T4338L sodium hydroxide water sodium permanganate

72 100 Fair

TANK

TANK USAGE TANK CONTENTS EXHAUST

FLOW

RATE

(ft/min)

RECOMMENDED

EXHAUST FLOW

RATE

(ft/min)*

AIR

CURRENT

SMOKE

EXHAUST

89F

Scale-Gone #5

Descaler ammonium hydroxyacetate ammonium citrate hydroxyacetic acid

N-N-diethylhydroxylamine

68 100 Fair

90F

Alkaline

Descaler T4181-

L Rust Remover water sodium hydroxide triethanolamine sodium gluconate(50%)

70 100 Fair

66F

Liquid Alkaline

Cleaner Rust

Bloc M5941 proprietary ingredient tetrapotassium pyrophosphate molybdenum

74 100 Fair

SECTION IV – COMMENTS: *While the 75-90 cfm/ft2 exhaust flow rate has been successful, it is believed that a minimum exhaust flow rate of 100 cfm/ft2 tank area for simple low activity processes should be considered, per ACGIH Ventilation Manual and notes below.

-The primary purpose of the exhaust hood is to receive and remove the contaminant laden air flow supplied by the jet. However, where the process configuration causes jet deflection or spillage, or emits contaminants at a high rate such as air agitation, higher exhaust flows may be necessary for contaminant capture. Therefore, 100 cfm/ft2 is recommended instead of 75 cfm/ft2. Ventilation systems do not meet recommended capture velocity.

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93113 Component Clean Shop

Bldg: 137 & 4032

Supervisor: Vince Burden

Phone: 464-7927

Total Personnel: 17 M/F: 17/0

OPERATIONS: Performs clean, plastic media blast (PMB), and corrosion removal on components.

FREQ/

DURA-

TION

NO.

OF

Operation of Noise Hazardous

Equipment

Personnel work in designated noise hazardous areas. Noise hazardous tools and equipment are labeled with

NAVMED 6260 series Noise Hazardous

Warning Decals. Personnel are expected to routinely exceed the 8-hour TWA of

85 dBA for noise.

7 hrs/shift/

17 Earplugs and/or designated noise hazardous areas should continue wearing appropriate hearing protection.

Continue enrollment of all personnel in the Noise Medical

Hand Cleaning & Chemical Stripping

Small Components

(Small Strip/Bldg. 137)

Small aircraft components are cleaned with detergent and mild paint stripper in four cleaning booths.

-A glove box varsol booth and two varsol soaking tanks all use MIL-PRF-

680. The varsol soaking tanks use a hose flush system and minor wire brushing if needed.

-Methylene chloride (MeCl) mild stripper is used on components after they have been stripped in the large stripper tank when residual paint remains.

MeCl is always applied with a paint brush (never sprayed) and then loose paint is manually removed with a scrapper or wire brush. Components are then washed off with water and detergent using a high-pressure sprayer. Total process time can be up to 5 hrs and includes application/soak/brush/rinse

7 hrs/shift 17 Chemical splash goggles, safety glasses w/faceshield, cloth coveralls, plastic apron, Tyvek coveralls, nitrile gloves, steel toe safety shoes, local exhaust ventilation, Based on exposure monitoring results in 93111, local exhaust ventilation, and method of application, overexposures to methylene chloride are not expected. Respiratory protection and chemical medical surveillance are not required.

Ventilation (see Table 4.1) is adequate to control methylene chloride vapors.

Recorded By: John Williams

Command: FRCE

6.2.5.2 INDUSTRIAL BULK PROCESSES BRANCH

Shop: 93113 Component Clean Shop

Bldg: 137 & 4032

FREQ/

DURA-

TION

NO.

OF

times.

Methylene chloride is a suspected animal carcinogen.

Large Heated Automated Stripper

Tank

Personnel load and remove baskets of parts from the heated (160-180F) stripper tank. Normally, parts are loaded by 1030 and removed the next morning.

Worker exposure is limited to when parts are entered into or removed from the tank.

Cee Bee A-427

2200 Gallon

A-145

3-4 baskets

/shift/3-4 hrs each strip time

17 Chemical splash goggles, safety glasses w/faceshield, cloth coveralls, plastic apron, Tyvek coveralls, nitrile gloves, steel toe safety shoes, local exhaust ventilation, closed lid tank, Noise ranging from 90 to 110 dBA is generated when parts are dried off with compressed air.

Double hearing protection is required when sound levels exceed 96 dBA. Personnel shall wear double hearing protection when using compressed air to dry parts.

Baseline exposure monitoring was conducted 02 August 2001

(Log # 01-0425).

Results for ethanolamine were below the PEL and AL. Based on short exposure time over tank, closed lid tank, adequate local exhaust ventilation, and current air sampling results, overexposures to ethanolamine are not expected and respiratory protection is not required.

Ventilation (see Table 4.2) is adequate to control…