Attachment_04n_2015_IHS_of_94400_Branch.pdf

2015 PERIODIC INDUSTRIAL HYGIENE SURVEY

OF

6.2.3.7

(94400) HYDRAULICS/PNEUMATICS COMPONENTS BRANCH

INDUSTRIAL HYGIENE DEPARTMENT

NAVAL HEALTH CLINIC

CHERRY POINT, NC 28533-0023

Enclosure (10)

TABLE OF CONTENTS

PAGE

Executive Summary 3

Evaluation Summary 4

94401 Valves and Regulators 6

94402 Starters and Turbines 11

94403 Engine Driven Compressor/gas Turbines 18

94404 Auxiliary Power Units/Fuel Accessories 22

94408 Hydraulic pumps, Propeller housing, and Hydraulic Actuator/Winches 35

Glossary of Terms Appendix A

Customer Satisfaction/Complaint Form Appendix B

EXECUTIVE SUMMARY

The periodic industrial hygiene survey of 6.2.3.7 (94400) Branch was conducted by Ralph

Rhodes, Industrial Hygienist, in December 2015. The purpose of the survey was to evaluate any changes to work processes or work practices that have occurred since the previous IH survey of

2013. A summary of program findings follows the Executive Summary. All personnel demonstrated a desire to maintain a safe and healthy work environment and as such there were few concerns to be addressed. The particular areas of interest to the 94400 Branch are as follows:

There were no findings that could not be addressed during the survey.

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. This information is provided in this survey report. The Division secretary will compile the registry and schedule the required medical surveillance physicals with the Naval

Health Clinic Occupational Medicine Department

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.

Customer Service Survey: A customer service survey is attached as Appendix B. Please have each supervisor from each shop complete the survey and return it via guard mail to: Naval Health

Clinic, Attn: Industrial Hygiene Department. This report reflects conditions and operations at the

94400 branch during the survey period. A periodic IH Survey is required for most work places by

DODINST 6055.5. 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

6.2.3.7

(94400) HYDRAULICS/PNEUMATICS COMPONENTS BRANCH

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. Attachment (4) provides a summary of current medical surveillance needs.

No Medical Surveillance is Recommended.

Medical Surveillance is Recommended.

No Change in Medical Surveillance Recommendations.

Medical Surveillance Recommendation changes

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): Y N

Comments: Shop personnel are potentially exposed to harmful physical, biological, and chemical agents as well as noted reproductive hazards and carcinogens. Personnel are required to receive hazard training in accordance with OPNAVINST

5100.23G.

3. Management of Reproductive Hazards:

Reproductive Hazards Present? Y N

Any change from previous survey? Y N

Comments: Noise, toluene, xylene and lead are reproductive hazards, identified in Individual Hazard Assessments. It is recommended that, wherever possible, the work center reduce, minimize, and/or eliminate the reproductive hazards and personnel exposure. Females who work with these materials should mention this to their prenatal medical care provider.

Significant health exposure should not result during normal shop operations.

4. Noise and Hearing Conservation Program (HCP):

Are personnel recommended for the HCP? Y N

Are personnel receiving audiograms? Y N N/A

Is hearing protection readily available? Y N N/A (cranial, muffs and plugs)

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

Comments: Continue use of hearing protection and participate in the Hearing Conservation Protection Program as specified.

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: At this time, there are no operations which require the use of a respirator in the 94400 Branch.

6. Ventilation:

Are ventilation systems used to control workplace exposures? Y N

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

Comments:

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: Ergonomic design of furniture was not optimal, however no musculoskeletal issues were found due to short durations and minimal repetition of work tasks. Most materials handling stressors are known and mitigated by use of lifting devices and safe manual lifting methods.

8. Other Applicable Programs:

Lead Control Asbestos Control

Carcinogens Other Class IV Visible Laser- Non Ionizing Radiation

Comments: lead is not present at or above the action level. Personnel report that as part of their training for soldering, they are familiar with the information on lead health hazards found in “Appendix A” of 29 CFR 1910.1025, the OSHA Lead

Standard. It is recommended that, wherever possible, the work center reduce, minimize, and/or eliminate the carcinogens and personnel exposures.

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

Additional Comments: Personnel demonstrated an active interest in promoting an effective health and safety program.

INDIVIDUAL HAZARD ASSESSMENT Date: December 2015

Industrial Hygienist: Ralph Rhodes

Organization: FRC East – Hydraulics/Pneumatics Components

Branch

Building Number: 137

Shop (WC)/Code: 94401 Valves and regulators

Supervisor: Gene Gillikin

Phone: 7114, 7974

Total Personnel, M/F: 23, 22/1

(no evening shift)

GENERAL SHOP OPERATIONS: This shop is responsible for the complete overhaul of aircraft valves and regulators from various aircraft and ground support equipment from all branches of the military, as well as foreign military services (FMS). Work consists of disassembly, inspection, and assembly of parts. The shop operates day and night shifts. Three personnel (2 test operators and 1 mechanic) work the night shift and perform component testing operations. All personnel are classified as

Pneudraulic Systems Mechanics (8255).

Employees certified to perform soldering, have received regular training on soldering and on the health hazards associated with working with lead, as per 29 CFR 1910.1025, Appendices A and B. The area is posted as required.

Available equipment, used as needed includes a drill press, acetylene torch, oven, and rotary wire brush.

Other noise hazardous tools may be used as required (e.g. grinders, impact guns).

Four personnel work at three hot air channel test stands for valves and regulators. They perform leak checks and repair of units at the stand. There is another test stand that does not use hot air, and is located in a separate room. Air pressures ranging from 280-600 psi and temperatures to 900 º F are common. Due to the heat involved, this task can be compared to working near a cooking grill. During adjustments hands may get within 10 inches of a 900 degree hot pipe. The operator is within 4 to 8 feet of the test unit. It takes up to 20 min for the equipment to reach operating temperature, and to 30 minutes to change the configuration and adapter pieces to test a different unit. One test run takes 10 minutes, longer if adjustments are required. Personnel wear full time hearing protection.

Water injection pump test cell – (This operation is not presently being done) Two personnel run pumps in an enclosed room. Each pump has a minimum of 10 runs with 4 minutes rest between each run. A valid run requires 530º to 600 o F air and pressure up to 500 psi to be flowing through the pump. The process generates excessive noise however the operator remains outside the enclosure during testing. This operation occurs 10 to 12 times a qtr. And is presently off line.

Airflow measurements collected during this survey period for the local exhaust system indicate adequate capture velocity. Measurement results can be found in the ventilation hood/systems evaluations at the end of this report section. Flow was found to meet the recommended rate for this equipment.

Results from a recent FRC East Safety and Health Division noise level survey for the hot air channel test stand room indicate that personnel require double hearing protection when working within 4 ft. of a noise source (Memorandum to Industrial Components Repair and Modification Division Director, code 6.2.3, Ser Code 6.5.1-PKJ/18b-10186, dated 4 Aug 2010).

HEALTH HAZARDOUS

STRESSORS AND

ASSOCIATED OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

WORKERS

CONTROLS

EXPOSURE

ASSESSMENT (1)

Component disassembly, inspection, assembly, testing -musculoskeletal stress. Hand tools are used.

Daily to 6 hours 23 SOP Acceptable. Force required, postures observed and amount repetition are all within a mild range for personnel

Component disassembly, inspection, assembly - skin exposure to hydraulic fluid and petroleum lubricants (Aero

Kroil, silicone grease, engine oil, Teflon grease, petrolatum, Synthetic grease, Anti-seize cmpd., Solid film lubricant, lubriplate, cutting fluid)

Daily, residual amounts in disassembly, matls. applied only in small amounts (<1/2 oz.) for assembly up to

10 times a day for less than 5 minutes each

23 Nitrile gloves Acceptable. Materials are mild irritants, small duration of use.

Component assembly - skin exposure to VOCs, sealants and adhesives (RTV 3145 sealant, locktite 272, Silicone primer 2 pt

RTV, cyanocrylate glue, torque seal, edge sealer (xylene (repro)), epoxy kit, locktight 242 and 272, humiseal, isopropyl alcohol, ) applied only in small amounts

(3 oz.) for assembly up to 4 times a day for less than 5 minutes each

23 Nitrile gloves Acceptable. Materials are mild irritants.

Component assembly aerosol can spray painting – skin and inhalation exposure to organic solvents, xylene (repro hazard), and toluene (repro hazard)

Less than 1 20

oz. can per month used, <5 minutes per occasion.

23 Done at nearby spray booth

Acceptable. Local ventilation and short duration of use.

Component assembly application of Alodine – skin exposure to chromate compounds. Use of SemPens

(one per month)

Used 8 times a month, less than

1 minute

23 Nitrile gloves, safety glasses

Acceptable. Very short duration, low vaporization potential

Component assembly application of Alodine – skin exposure to chromate compounds. Dipping parts in alodine solution, near H 46 hangar area. Parts are small.

Less than 1 min per occasion, dip and rinse, up to 2 times a month

23 Chemical goggles, splash shield, heavy nitrile gloves, rubber apron.

Local exhaust ventilation

Acceptable. Very short duration.

Assembly – skin exposure to hot metal parts. Handling of parts

Heated in oven and by torch.

Daily to 4 times, 5 min each

23 Insulated gloves Acceptable, provided proper gloves are worn, SOP followed.

Parts cleaning – eye exposure to debris. use of rotary steel and brass wire brushes

3X/week, 5 min.

each

23 Safety goggles Acceptable with use of eye protection. No significant problems found.

Soldering – inhalation of flux combustion vapor (640 flux).

Soldering done only on specific components

<3min mins/occasion, 1-3 occasions/day

Ambient ventilation

Acceptable. Very short exposure

Soldering – Inhalation and ingestion of lead (repro)

<3min mins/occasion, 1-3

Acceptable based upon sampling results from similar operations.

Very short exposure

ASSOCIATED OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

Testing valves and regulators – noise.

Daily 8 to 12 hours, depending on work load

7 Double Hearing protection (muffs and plugs), SOP and training

Unacceptable. Single and double hearing protection required in test cells, double for within 4 ft of noise source in hot air channel testing area. Personnel should remain in hearing conservation program.

Testing valves and regulators – skin and whole body exposure to heat, occasional use of dry ice.

Daily 8 to 12 hours, depending on work load

7 Leather &

Thermal gloves, SOPs, safety glasses, pedestal fans

Unacceptable. Temperatures in these areas get uncomfortably warm (see note below).

Acceptable for dry ice use with

PPE and SOP.

Exposure Monitoring – none required.

Recommended Medical Surveillance Programs – Noise (503) for test cell operators, and for personnel operating pneumatic tools or working around nearby noise hazardous processes for up to one hr. a day, for 30 or more days a year.

1. USE THE FOLLOWING EXPOSURE CODES:

ACCEPTABLE – ONE WHERE THE IH WILL NOT EXPECT THE SIMILARLY EXPOSED GROUP (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

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

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

CARCINOGEN

Table 1 - Identified sources of noise for shop 94401

1. Single hearing protection required Double hearing protection required (above 104 dBA)

a. Furnace controller f. air nozzle

b. Flow stands Air channel g. Impact gun

c. Air channel 3 h. Router

d. Test stand 2 i. Grinder (35461)

e. CH53 fuel flow test stand

j. Valve channel 1

k. Water injection test

l. Grinder (320084)

NAVAL HEALTH CLINIC, CHERRY POINT, NC 28533-0023

VENTILATION HOOD/SYSTEMS EVALUATION

ACTIVITY: FRCE Supv./Phone: Gene Gillikin /7114 Log #: 16v-172

SECTION I - HOOD/SYSTEM LOCATION valves and regulator shop, side room

Shop: 94401 Bldg: 137

SECTION II – INSTRUMENTATION Make: TSI S/N: 8005 Model: 9535 Cal. Date: Jan 2015

SECTION III - HOOD/SYSTEM EVALUATION Contaminant(s) Controlled: LEAD, flux vapor

SYSTEM DIAGRAM

(not to scale)

MEASUREMENTS

HOOD# DIMENSIONS

(FT)

FACE

AREA

(SQ FT)

AVERAGE

CAPTURE

VELOCITY

(FPM)

RECOMMENDED

CAPTURE/SLOT AIR

VELOCITY (FPM)

AIR CURRENT

FLOW

(smoke tube)

137-

D175

-- -- 47 (at vise)

(was 73 in 2013)

*100-200 Moderate

Upper slot

3 X 1.5 4.5 Slot velocity

1400 (2210 in

2013)

2000 (slot)

Lower slot

3 X 1.5 4.5 Slot velocity

1300 (1920 in

2000 (slot)

SECTION IV - COMMENTS: Pencil solder station. Measurements were taken at the vise which is 13" from the nearest slot (lower), and at each slot. *Per ACGIH Ventilation Manual, 25th Ed., Table 3-1, released at low velocity into moderately still air. Ventilation is below recommended values.

Surveyed by: Ralph Rhodes Date: 19 Dec 2015

Vise (x) is centered 13” from the lower slot

Work bench x

ACTIVITY: FRCE Supv./Phone: Gene Gillikin /7971 Log #: 16v-173

SECTION I - HOOD/SYSTEM LOCATION Side Room, shop 94401 Shop: 94401 Bldg: 137

SECTION III - HOOD/SYSTEM EVALUATION Contaminant(s) Controlled: Metal Dusts

LEFT RIGHT

HOOD#

DIMEN.

(FT)

FACE

AREA

(SQ FT)

CAPTURE.

(FPM)

RECOMMENDED

CAPTURE RATE

(CFM) *

AIR CURRENT

FLOW

(smoke tube)

USN:

*3656 &

D = .25 .20

Duct LEFT 400

(510 in 2014)

RIGHT 575

(580 in 2014)

Moderate

Vent face L 158 (170 in

R 248 (245 in 2013)

SECTION IV - COMMENTS: *Required for Buffing/Polishing Wheels up to 9" diameter (poor enclosure) per

ACGIH Ventilation Manual 25

TH

Edition (Pg. 10-142). Measure duct within ½ in. of face. Ventilation meets recommended capture velocity.

Surveyed by: Ralph Rhodes Date: 16 Dec 2015

MOTOR

Organization: FRC East – Hydraulics/Pneumatics Components

Branch

Building Number: 137

Shop (WC)/Code: 94402 Starters and Turbines

Supervisor: Joey Whitford

Phone: 7944

Total Personnel, M/F: 12, 11/1

GENERAL SHOP OPERATIONS: This shop is responsible for the disassembly, maintenance, modification, assembly, and testing of aircraft starters, turbines, turbo fans, oil coolers, and blowers.

Testing and troubleshooting is done on systems that are designed to adjust automatically to factors such as temperature, humidity, pressure velocity, or rate of change of velocity, or having sensing devices which provide feedback system information on the systems performance.

-Machine Shop Work Area: One artisan is assigned to this work area. Shop equipment includes lathes, a drill press, hydraulic press, a mill, various drills and sanding disks, and hand tools. An oven is used to facilitate the fitting together of parts. This equipment is used on an as needed basis according to workload. The majority of parts reworked in this area are steel and aluminum. Most of the drilling and grinding is performed by the machinist. However, occasionally one additional shop employee may grind and/or sand on aircraft parts (aluminum valve bodies).

The shop operates 2 starter test cells and one cooling turbine test cell. The Air Cycle Machine test cell has 12 different test stands, each individually wheeled in to be used when required.

Metal grinding is conducted in conjunction with the starter and turbine balancing process. The size of area to be grinded varies from <1” to 24” inches based on component and the type of material. Three types of pneumatic grinding tools are used dependent on the type of surface and area to be removed: (1) a

Dynabrade sanding belt, (2) a Dotco chipper, (3) a grinding pencil. All grinding tools are noise hazardous and single hearing protection is required during use. Personnel exposures are expected to exceed the 8hr

TWA of 84 dBA for noise.

The balancing room has been moved to a different room. The downdraft table in the old location is now occasionally used by 94408 for stationary sleeve sanding. Two portable ventilation units with extendable ducts are now used in the new facility. The new air balance machine room includes a hydraulic press, drill press, and six balance test stands. Balancing is done for shops 94404, 03 and 02. (See comments under workplace monitoring, end of Hazard Assessment table.)

Sound level readings taken during run up of turbines has resulted in levels above 104 dBA inside the balance room, above 85dBA just outside the room, and 88 dBA outside the door to NDI. Personnel working in these areas should be wearing hearing protection during operations, double for inside the balance room.

Employees certified to perform soldering, have received regular training on soldering and on the health

STRESSORS AND ASSOCIATED

OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

Disassembly, assembly, testing – noise (Single Hearing prot. sources:

Pistol Grip Drill, Pencil Grinder, Straight router, Air Nozzle, File, doubl hearing prot. sources:

Grinder, Entering & operating Test

Cells, Balancer)

20 min to 4 hours daily

8 Ear plugs, muffs.

Unacceptable. Hearing protection required as noted.

Personnel should be enrolled in hearing conservation medical surveillance program.

Disassembly, inspection, assembly and testing - musculoskeletal stress.

Hand tools are used, and lifts of 30 or

40 lbs. occasionally required

Daily to 6 hours 8 SOP and training

Acceptable. Force required, postures observed and amount repetition are all within an acceptable range for personnel. No significant concerns were found.

Disassembly – inhalation of asbestos fibers.

Weekly to 45 min.

8 SOP and training

Acceptable. Fewer of these parts in the system, past sampling indicates exposure well below established exposure limits.

Disassembly, inspection, assembly -skin exposure to hydraulic fluid and petroleum lubricants (Aero Kroil, silicone grease, molybdenum disulfide, Magnalube G, royco 27 grease, engine oil, Teflon grease, petrolatum, Synthetic grease, Anti-seize cmpd., Solid film lubricant, permaslik G, assembly fluid)

Daily, residual amounts in disassembly, applied only in small amounts

(<1 oz.) for assembly up to 4 times a day for less than 5 minutes each

8 Nitrile gloves Acceptable. Materials are mild irritants.

Assembly - skin exposure to sealants and adhesives (Locktite 272, RTV

3145 and 162, Leak detector, Isopropyl alcohol, Silicone primer 2 pt RTV, Desoto PRC-High Solids

Epoxy Polyamide Primer Sempens, hatloc 3212, adhesive C-111, edge sealer (xylene (repro)), crazy glue) applied only in small amounts

(3 oz.) for assembly up to 4 times a day for less than 5 minutes each

12 Nitrile gloves Acceptable. Materials are mild irritants.

Assembly – skin exposure to hot metal parts. Handling of parts Heated in oven and by torch.

Daily to 4 times, 5 min each

12 Insulated gloves Acceptable, provided proper gloves are worn, SOP followed.

Assembly aerosol can spray painting – skin and inhalation exposure to organic solvents, xylene

(repro hazard), and toluene (repro hazard)

1 or 2, 20 oz.

cans per month used, <5 minutes per occasion.

12 Outside ambient air, chemical splash goggles

Acceptable. Ample ambient ventilation and short duration of use.

Assembly application of Alodine – skin exposure to chromate compounds. Two part epoxy is mixed daily and used by all artisans in small amounts (< 1sq. in.).

1- 1.5 oz kit daily is shared for all shop applications.

12 Nitrile gloves Acceptable. Small amounts, short duration of use.

OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

Parts cleaning – Skin and inhalation exposure to Stoddard solvent. Use of glove box unit.

5 to 15 min. per job. Up to 3 times a day

8 Local exhaust ventilation, nitrile gloves, safety glasses

Skin and inhalation exposure acceptable with use of ventilation and PPE. Stoddard solvent is a mild skin irritant.

Machine shop – skin exposure to cutting fluid and alcohol.

Daily 1- 5 min.

up to 4 times

1 Safety glasses, Nitrile gloves

Acceptable. Mild hazard, short duration, small quantities.

Machine shop – eye, skin and inhalation exposure to metal dust and cuttings.

Daily 1- 5 min.

up to 4 times

1 Safety glasses, Nitrile gloves

Acceptable. Mild hazard, short duration, small quantities. 1 in. rotary disk pad used for grinding.

Balancing Room: Metal Grinding

Operations – eye and inhalation exposure to Metal dusts, (primary -aluminum, titanium, rarely - stainless steel, cadmium, hexavalent Chrome.

Magnesium possible, but none in past two years)

Hexavalent Chromium (VI), Noise, Ergonomic concerns

Avg. 1 minute per occasion, to

15 times a day

1 Natural and mechanical ventilation, nitrile gloves, Safety glasses, goggles and face shield; Tyvek coat, hearing protection, plugs and muffs

Acceptable. Grinding is done using portable ventilation units, historical air sampling results well below

Occupational Exposure limits for Cadmium, Chromium.

The amount of these metals that is removed is very small.

Balancing Room, balancing and grinding – noise. Turbine operation up to 4 hrs./day, 10 days/month

1 Double hearing protection

(plugs, muffs) for turbine noise.

Unacceptable. Turbine Sound level readings exceeded 104 dBA for up to 4 hours.

Balancing Room, sempen or epoxy primer application – skin and inhalation exposure to chromates.

Brush apply material to bare metal

(<1 sq. inch)

Less than 1 min.

5 times a week

1- 1.5 oz kit daily is shared for all shop applications

1 Nitrile gloves Acceptable. Air sampling results well below

Occupational Exposure limits for Chromate

Soldering – inhalation of flux combustion vapor. Skin contact and ingestion of lead (repro) solder only on specific components

5-10 mins/occasion, 1-3

Acceptable. Very short exposure

Operating Cooling Turbine, and

Starter Test Stand – noise.

8 hours a day 3 Nitrile gloves, safety shoes, earplugs/muffs, safety glasses

Unacceptable. Double Hearing protection required while equipment is running.

Enrollment in hearing conservation medical surveillance program is required.

Operating Cooling Turbine, and

Starter Test Stand – musculoskeletal stress (lifting, push/pull of test stands in and out of cells)

To 40 lbs. 4 or 5 times a day

3 Training, SOP Acceptable, no significant concerns were found except for starter test stands. One stand weighs 2200 lbs and is maneuvered by hand into and out of the cell. Recommend investigating possibility of using a two wheel powered dolley.

OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

Operating Cooling Turbine, and

Starter Test Stand – skin exposure to hydraulic fluid, grease, and oil

To 8 hrs. a day 3 Nitrile gloves Acceptable. Materials are mild irritants.

Exposure Monitoring – no operations were identified that required exposure monitoring.

Recommended Medical Surveillance Programs – Noise (503) for test cell operators, and for personnel operating pneumatic tools or working around nearby noise hazardous processes for up to one hr. a day, for 30 or more days a year.

1. USE THE FOLLOWING EXPOSURE CODES:

ACCEPTABLE – ONE WHERE THE IH WILL NOT EXPECT THE SIMILARLY EXPOSED GROUP (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

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

ACTIVITY: FRCE Supv./Phone: Joey Whitford /4-7973 Log #: 16v-174

SECTION I - HOOD/SYSTEM LOCATION Starter and turbine shop/grinding room

Shop: 94402 Bldg: 137

SECTION III - HOOD/SYSTEM EVALUATION

Contaminant(s) Controlled: metal dusts/stainless steel, aluminum, & magnesium

(grille) (FT)

FACE AREA

(SQ FT)

CAPTURE

VELOCITY

(FPM) AVG)

*RECOMMENDED

CAPTURE VEL.

SMOKE TUBE

TEST

137-D41 or

70456

4.5 x 2 9

(Was 215 in 2013)

150-200* Rapid

Downdraft vent is partially covered by stationary sleeve spinner equipment.

SECTION IV - COMMENTS: Downdraft table with a hood at one end. The measurements were taken at the operator’s breathing zone. *Recommended capture velocity per ACGIH Ventilation Manual, 25th Ed., VS-80-18, P.

10-40, and Table 3-1, released at low velocity into moderately still air. Ventilation meets recommended capture velocity.

ACTIVITY: FRCE Supv./Phone: Joey Whitford /4-7973 Log #: 16v-175

SECTION I - HOOD/SYSTEM LOCATION Shop: 94402 Bldg: 137

SECTION III - HOOD/SYSTEM EVALUATION Contaminant(s) Controlled: PD-680, Isopropyl Alcohol

(FT)

FACE AREA

(SQ FT)

CAPTURE

VELOCITY

(FPM)(AVG)

RECOMMENDED

CAPTURE

VELOCITY

SMOKE TUBE

TEST

137-D39 2.3 X 2.7 6.2 174 (145 in 2013) *100-200 FPM Rapid

SECTION IV - COMMENTS: *Per ACGIH Manual of Industrial Ventilation, 25th Ed., Table 3-1, released at low velocity into moderately still air. There are two pots filled with clear cleaning fluid for small parts. The booth has two metal grated filters to exhaust the vapors. Ventilation meets recommended capture velocity.

ACTIVITY: FRCE Supv./Phone: Joey Whitford /4-7973 Log #: 16v-176

SECTION I - HOOD/SYSTEM LOCATION Shop: 94402 Bldg: 137

SECTION III - HOOD/SYSTEM EVALUATION Contaminant(s) Controlled: LEAD, flux vapor

Table top unit, adjustable and flexible tube

FACE AREA

(SQ FT)

CAPTURE

VELOCITY

(FPM)(AVG)

RECOMMENDED

CAPTURE

VELOCITY

SMOKE TUBE

TEST

n/a 2 in dia duct 0.0281 23 fpm at 5 in.

(was 43 in 2013)

1330 at face

*100-200 FPM Rapid

SECTION IV - COMMENTS: *Per ACGIH Manual of Industrial Ventilation, 25th Ed., Table 3-1, released at low velocity into moderately still air.

Organization: FRC East – Hydraulics/Pneumatics Components

Branch

Building Number: 137, 133

Shop (WC)/Code: 94403 Engine driven compressors, Gas Turbines

Supervisor: Rashida Williams

Phone: 7972

Total Personnel, M/F: 17, 16/1

GENERAL SHOP OPERATIONS: Check, test, repair, overhaul and modify various engine driven components in direct support of the aircraft line, GSE, customer service, and all branches of the military, as well as foreign military services (FMS). The shop also performs maintenance, repair and testing on engine driven compressors (EDCs) and cabin pressure regulators and valves. The shop is divided into three areas: EDC Disassembly & Assembly Area, EDC test cells 3,4, and 5, GTC and APU test cells 7,8, & 9, and the Vacuum Chamber in hot air channel test cell 4. The Mark IV test cell operation outside is being moved to cells 7,8,and 9. Test stands are used daily by four employees who are permanently assigned to this area to test EDCs under various flight conditions (flight altitude and pressure). Four vacuum chamber test stands test cockpit cabin air pressure regulators and valves at various atmospheric pressures to simulate flight conditions. The test stands are maintained and operated in an area located inside Shop 94101 Hot Air Channel Test Stand room.

The total work evolution of the regulators and valves involves a check-in test, disassembly and re-assembly, and check out test on each component. It takes approximately 5 hours to disassemble/reassemble each component and 30 mins to 2.5 hours to test them.

The EDC test stand, and Hot Air Channel Test room are designated noise hazardous areas. Hearing protection is worn when operators enter the test cell during the run. If larger scale adjustments are required, the test stands are turned off prior to entering.

Gas turbine starters for the AV8 are tested in a self-contained conex style unit located just outside building 137. Two employees run this operation, which takes 5 to 6 hours for one unit. The shop reports testing at a rate of 3 to 10 units a month. Less than 30 percent of test units will have issues which require longer testing time. This process accomplishes “seal cuts” on the unit. Carbon combustion products are produced in the process. The GTS exhaust vents out the side wall. PPE used is the same as for other test cells and should be adequate for this operation.

Employees certified to perform soldering, have received regular training on soldering and on the health

Results from an FRC East Safety and Health Division noise level survey for the hot air channel test stand room indicate that personnel require double hearing protection when working within 4 ft. of a noise source (Memorandum to Industrial Components Repair and Modification Division Director, code 6.2.3, Ser Code 6.5.1-PKJ/18b-10186, dated 4 Aug 2010).

ASSOCIATED OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

Disassembly, assembly, testing

– noise (Single Hearing prot.

sources: Varsol spray booth, Pistol grip drill, straight router, pencil grinder, engraving pencil

90 degree router, Compressed air blower doubl hearing prot. sources:

vacuum chamber testing, working within 4 ft. of hot air channel test stand room noise sources.

20 min to 4 hours daily

17 Ear plugs, muffs. Unacceptable. Hearing protection required as noted. Personnel should be enrolled in hearing conservation medical surveillance program.

Disassembly – inhalation of asbestos fibers.

Weekly to 45 min.

17 SOP and training Acceptable. Fewer of these parts in the system, past sampling indicates exposure well below established exposure limits.

Disassembly, inspection, assembly and testing -musculoskeletal stress. Hand tools are used, and lifts of 30 or

40 lbs. occasionally required

Daily to 6 hours 17 SOP and training Acceptable. Force required, postures observed and amount repetition are all within an acceptable range for personnel. No significant concerns were found.

Cleaning and testing of units – skin, eye, and inhalation exposure to acetone, alcohol.

Wipe cleaning of components.

Daily to 5 hours 17 Nitrile gloves Acceptable. Compounds are mild irritants.

Parts cleaning – Skin and inhalation exposure to Stoddard solvent. Use of glove box unit.

job. 1 or 2x/day per person

17 Local exhaust ventilation, nitrile gloves, safety glasses.

Skin and inhalation exposure acceptable with use of ventilation and PPE. Stoddard solvent is a mild skin irritant.

Disassembly, inspection, assembly - skin exposure to hydraulic fluid and petroleum lubricants (Aero Kroil, silicone grease, engine oil, Teflon grease, petrolatum, Synthetic grease, Anti-seize cmpd.)

disassembly, applied only in small amounts

(<1 oz.) for assembly up to 4 times a day for less than 5 minutes each

15 Nitrile gloves Acceptable. Materials are mild irritants.

ASSOCIATED OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

Assembly - skin exposure to sealants and adhesives (Locktite

272, RTV 3145 sealant, Leak detector, Isopropyl alcohol, Silicone primer 2 pt RTV, Desoto PRC-High Solids Epoxy

Polyamide Primer Sempens*, crazy glue) applied only in small amounts

(<1 oz.) for assembly up to 4 times a day for less than 5 minutes each

17 Nitrile gloves Acceptable. Materials are mild irritants.

Assembly – skin exposure to hot metal parts. Handling of parts

Heated in oven.

Daily to 4 times, 5 min each

17 Insulated gloves Acceptable, provided proper gloves are worn, SOP followed.

Assembly aerosol can spray painting – skin and inhalation exposure to organic solvents, xylene (repro hazard), and toluene (repro hazard)

1, 20 oz. cans per month used, <5 minutes per occasion.

16 Use of paint booth, chemical splash goggles

Acceptable. Adequate ventilation and short duration of use.

Assembly aerosol can spray painting primer – skin and inhalation exposure to Chromate compounds.

1 or 2, 20 oz.

cans per month used, <5 minutes per occasion.

17 Outside ambient air, chemical splash goggles

Acceptable. Ample ambient ventilation and short duration of use.

Assembly, application of epoxy primer – skin and inhalation exposure to chromates. Brush apply material to bare metal (<1 sq. inch)

Less than 1 min.

5 times a week

1- 1.5 oz kit daily is shared for all shop applications

17 safety glasses, nitrile gloves

Acceptable. Air sampling results well below Occupational Exposure limits for Chromate

Parts cleaning – inhalation of metal dust. Use of rotary wire brush in balance room.

5 min as needed once a month

17 Local exhaust ventilation, safety glasses

Acceptable. Use of local exhaust and minimal duration of time.

Parts cleaning – noise. Use of varsol glove box unit.

times a day

17 none Acceptable - Booth has been replaced by glove box unit. No significant noise exposure

Parts cleaning – Skin and inhalation exposure to Stoddard solvent. Use of glove box unit.

times a day

17 Local exhaust ventilation, nitrile gloves, safety glasses, goggles and face shield

Skin and inhalation exposure acceptable. Stoddard solvent is a mild skin irritant.

EDC Test Stand & EDC

Components Test Stand – skin and inhalation exposure to isopropyl alcohol, oil, fuel, hydraulic fluid, or Stoddard solvent when testing components or cleanup of area.

Intermittently to

6 hours daily.

Cleanup takes about 20 minutes every 4 to 6 days

6 Exhaust ventilation, nitrile gloves, leather work gloves, safety goggles

Acceptable. Mild irritant, airborne aerosols happen only if there is a leak (very infrequently).

EDC Test Stand & EDC

Components Test Stand – noise

Intermittently to

6 hours daily

6 Sound proof test cell, single hearing protection

Unacceptable. Single hearing protection required as noted.

Personnel should be enrolled in hearing conservation medical surveillance program.

EDC Test Stand & EDC

Components Test Stand – heat

Intermittently to

6 hours daily

6 leather gloves, cool down time

Acceptable. No significant exposure concerns were found.

ASSOCIATED OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

EDC Test Stand & EDC

Components Test Stand – musculoskeletal stress. Moving

4 to 500 pounds of equipment

Intermittently to

6 hours daily

6 Overhead crane, lift table, SOP

Acceptable. Difficult tasks are known and managed using assistance and lifting aids.

Vacuum chamber testing -noise

1 to 3 times a week

3 Double hearing protection (Ear plugs and ear muffs)

Unacceptable. Sound levels reach

104 dBA, requires double hearing protection (ear plugs and ear muffs), enrollment in hearing conservation medical surveillance program.

Soldering – inhalation of flux combustion vapor. Soldering flux.

5-10 mins/occasion, 1-3 occasions/day

9 (3 in EDC and 6 in fuel control accessories area)

Mechanical

Exhaust

Ventilation, Safety glasses

Acceptable. Very short exposure

Soldering – Skin contact and ingestion of lead (repro) 60/40 solder

1-3 occasions/day

9 (3 in EDC and 6 in fuel control accessories area)

Mechanical

Exhaust

Ventilation, Safety glasses, lead hazard training

Recommendation: Follow the guidance provided in the referenced table and follow up on evaluating and repairing the air conditioning unit.

Recommended Medical Surveillance Programs – Noise (503) for Work with noise hazardous equipment, and for test stand and vacuum chamber testing.

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

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

Organization: FRC East – Hydraulics/Pneumatics Components Branch

Building Number: 137, 133

Shop (WC)/Code: 94404 Auxiliary Power Units/Fuel Accessories

Supervisor: Kenneth Lane

Phone: 7971

Total Personnel, M/F: 19, 17/2 (no evening shift)

GENERAL SHOP OPERATIONS:

This section is responsible for the complete overhaul of aircraft fuel controls and accessories such as valves, manifolds, regulators (low and high pressure) from various aircraft and ground support equipment.

Work consists of disassembly, inspection, assembly, and testing of parts. Components are tested at fuel test stands in bldg. 133.

Components are checked, tested, repaired, overhauled and modified in direct support of the aircraft line, GSE, customer service, and all branches of the military, as well as foreign military services (FMS). Also supports the Presidential Support Program (Gold Plate) with APU, fuel controls, fuel accessories, and various aircraft components.

APUs for the V-22 aircraft are assembled and disassembled in a room off of the main isle toward the H-

53 hangar. The test stands are used daily by four employees who are permanently assigned to this area to test EDCs under various flight conditions (flight altitude and pressure). The test stand has two test areas and a control room. The Vacuum Chamber area is located in Shop 94401's Hot Air Channel Test Stand room. Four vacuum chamber test stands test cockpit cabin air pressure regulators and valves at various atmospheric pressures to simulate flight conditions. The test stands are maintained and operated by one employee in an area located inside Shop 94101 Hot Air Channel Test Stand room.

Personnel spend approximately 8 hours disassembling a unit, up to 16 or more hours repairing and replacing parts, 20 hours for assembly, and 7 hours (average) to test and certify.

The cleaning and stripping area, the EDC test stand, and Hot Air Channel Test room are designated noise hazardous areas.

The shop maintains three APU test stands in the test cell area behind Shop 94404 adjacent to three Gas

Turbine Compressor (GTC) Test Stand Rooms. The console/control rooms are shared with both (APU/&

GTC mechanics). There is minor difference in the operation of the APU test cells and the GTC test cells.

Testing is performed daily. These test cells are accessed through a sound proof door. Soundproof walls and doors also separate the control room and the actual test cells. The test cells and control areas are designated and labeled as noise hazardous areas. Based on Sound pressure level measurements (SPL), hearing protection is not required in the control room. However, SPLs above 104 dBA were measured inside the operating test cell; therefore, double hearing protection is required when entering the operating test cell, if the device undergoing testing is powered up. A plumbed emergency eyewash/& shower is located outside of the test stand rooms (next to test cells # 8 & 9). The test stand and test stand area are appropriately identified as noise hazardous (above the NAVOSH noise hazard standard of 84 dBA).

Maintenance Division replaces the oil filters and performs maintenance on the test stands when required.

Each test stand contains supply and exhaust air ducting to remove oil mist and combustion gasses generated during the testing cycles.

Artisans assigned to the fuel controls area maintain and operate four fuel control test stands and one accessories test stand, all located in building 133. Two Bauer Fuel Control and Accessory stands and one

36200 APU Fuel Control stand are used to test APU fuel control valves. They have both a purge vent for the machine electrical controls, and a local exhaust vent in the operator’s work position.

-A Mark IV test stand tests fuel nozzles for delivery accuracy using a closed loop system.

-Calibrating fluid is used during the testing of fuel controls and accessories. The stands have built in and portable drip pans, and each has an attached ventilation system. All stands include a small vent at the drip pan except the Mark IV stand. Measurement results for these ventilation systems can be found at the end of this survey report. Measurement results indicate that these test stands meet the recommended capture velocity.

-Based on a qualitative evaluation of this ventilation system and short task duration of the accessories test stand testing procedure, personnel exposures to organic vapors (fuel vapor and Stoddard Solvent and other calibration fluid ingredients) are expected to be well below NAVOSH limits. Respiratory protection and exposure monitoring are not required.

-Employees add approximately 5-10 gallons of calibrating fluid to the test stands per month using an enclosed delivery device. They position a 55-gallon drum on a mobile cart near the test stands and connect a delivery hose to the test stand. A low-pressure air device mechanism is used to activate the flow of fluid from the drum to the test stands. Employees wear appropriate eye protection (safety glasses, goggles, and face shield) during this process. Based on existing controls, personnel exposures to organic vapors are expected to be well below NAVOSH limits.

-Sound pressure level (SPL) measurements were collected during a previous IH walk through during the operation of the P102C test stand. Results avg. 84-87 dBA in the general worker’s hearing zone area.

Employees certified to perform soldering, receive regular training on soldering and on the health hazards associated with working with lead, as per 29 CFR 1910.1025, Appendices A and B. The area is posted as required.

ASSOCIATED OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

Disassembly, assembly, testing

– noise Single Hearing prot.

sources: Pistol grip drill, straight router, pencil grinder, engraving pencil 90 degree router, Compressed air blower doubl hearing prot. sources:

vacuum chamber testing

20 min to 4 hours daily

19 Ear plugs, muffs. Unacceptable. Hearing protection required as noted.

Personnel should be enrolled in hearing conservation medical surveillance program.

Disassembly, inspection, assembly and testing -musculoskeletal stress. Hand tools are used, and lifts of 30 or

40 lbs. occasionally required

Daily to 6 hours 19 SOP and training Acceptable. Required force, postures observed and amount repetition are all within an acceptable range for personnel.

No significant concerns were found.

ASSOCIATED OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

Disassembly, inspection, assembly - skin exposure to hydraulic fluid and petroleum lubricants (Aero Kroil, silicone grease, engine oil, Teflon grease, petrolatum, Synthetic grease, Anti-seize cmpd., haccol 3212 lubricant, clover alumimum oxide grease mix (lapping cmpd)

43431 grease, tribolube II & III) disassembly, applied only in small amounts

(3 oz.) for assembly up to 4 times a day for less than 5 minutes each

19 Nitrile gloves Acceptable. Materials are mild irritants, used for short periods of time.

Cleaning and testing of units – skin, eye, and inhalation exposure to acetone, alcohol.

Wipe cleaning of components, less than 4 oz used per day

Daily to 5 hours 19

Nitrile gloves Acceptable. Materials are mild irritants, used for short periods of time.

Parts cleaning – eye and skin exposure to acid solution. Use of descaler acid tank, dip and rinse, located at the clean shop.

May require some wire brushing.

10 minutes or less, to 4 times/week

14 Nitrile gloves, goggles, face shield, rubber apron

Acceptable. Controls and work method reduce potential for exposure. Very short duration.

Parts cleaning – Skin and inhalation exposure to Stoddard solvent. Use of varsol glove box booth.

times a day

14 Local exhaust ventilation, nitrile gloves, safety glasses, goggles and face shield, rubber apron.

Skin and inhalation exposure acceptable. Stoddard solvent is a mild skin irritant.

Parts cleaning – Skin and inhalation exposure to Stoddard solvent. Transferring used fluid to hazmat area, and refilling with new fluid is done by Hazmat personnel. 4 gallons replaced per occasion.

15 min. per job.

Up to 2 times a week

3 face shield, nitrile gloves, and sometimes a chemical splash apron

Skin and inhalation exposure acceptable with use of ventilation and PPE. Stoddard solvent is a mild skin irritant.

Assembly - skin exposure to sealants and adhesives (Locktite

272, RTV 3145 sealant, Leak detector, Isopropyl alcohol, Silicone primer 2 pt RTV, Desoto PRC-High Solids Epoxy

Polyamide Primer Sempens*, crazy glue) applied only in small amounts

(3 oz.) for assembly up to 4 times a day for less than 5 minutes each

19 Nitrile gloves Acceptable. Materials are mild irritants.

Assembly – skin exposure to hot and cold metal parts. Handling of parts Heated in oven, or cooled with dry ice.

Daily to 4 times, 5 min each

19 Cryogenic gloves and heat Insulated gloves

Acceptable, provided proper gloves are worn, SOP followed.

Assembly aerosol can spray painting – skin and inhalation exposure to organic solvents, xylene (repro hazard), and toluene (repro hazard)

1 or 2, 20 oz.

cans per month used, <5 minutes per occasion.

19 Ventilated Spray booth, chemical splash goggles

Acceptable. Ample ventilation and short duration of use.

Assembly aerosol can spray painting primer – skin and inhalation exposure to Chromate compounds.

1 or 2, 20 oz.

cans per month used, <5 minutes per occasion.

19 Ventilated spray booth, chemical splash goggles

Acceptable. Ample ventilation and short duration of use.

STRESSORS AND

ASSOCIATED OPERATIONS

DURATION/

FREQUENCY

NUMBER

OF

Assembly, Balancing room application of chromate primer with epoxy paint and sempens – skin an inhalation exposure to chromate compounds. Shop uses 1 2oz kit a month, 1 sempen/month monthly, less than 5 square inches

9 Local exhaust ventilation, safety glasses, nitrile gloves

Acceptable. Sampling for similar operation results were well below Navy and OSHA exposure limits

Balancing Room: Metal

Grinding Operations – eye and inhalation exposure to Metal dusts, (aluminum, titanium, stainless steel, cadmium, hexavalent Chrome magnesium possible, but none in past three years)

Hexavalent Chromium (VI), Noise, Ergonomic concerns

Daily, 7 hrs. 9 Natural and mechanical ventilation, nitrile gloves, Safety glasses, goggles and face shield; Tyvek coat, hearing protection, plugs and muffs, safety shoes

Acceptable. Grinding is done using a portable local exhaust unit, 90 percent is aluminum or titanium. air sampling results well below Occupational

Exposure limits for Cadmium, Chromium

Balancing Room, balancing and grinding – noise. Grinding and Turbine operation

To 4 hours a day 9 Double hearing protection (plugs, muffs)

Unacceptable. Turbine Sound level readings exceeded 104 dBA for up to 4 hours. Double hearing protection required.

Balancing Room, balancing and grinding – inhalation of metal dust from general sweeping, cleaning.

30 minutes a week

9 none Acceptable based on small amounts, limited duration.

Balancing Room, balancing and grinding – inhalation of metal dust while grinding on metals.

To 5 minutes each, up to 6 times daily

9 Local exhaust ventilation

Acceptable. Local exhaust ventilation is used for operation.

Tested and found to be within recommended capture values.

Operating Test Stands – skin and inhalation exposure to fuel, hydraulic fluid, Stoddard solvent, and 23699 synthetic oil aerosol. Occurs during connection, disconnection, equipment adjustments, and test cell clean up (20-30 min a day).

Intermittently to

6 hours daily

3 APU; 3-5

GTC; 3 fuel accessories

Exhaust ventilation Acceptable. Mild irritant, airborne aerosols happen if there is a leak, LC2, and GSE APUs produce oil mist. Synthetic aircraft engine oil is added directly into the compressor oil tank utilizing a self-contained oil dispensing system. Each test stand contains supply and exhaust air ducting to remove oil mist and combustion gasses generated during the testing cycles.

Operating Test Stands – skin and inhalation exposure to isopropyl alcohol. Cleaning connections, approximately 1oz per test cycle

Intermittently to

2 hours daily

3 APU; 3-5

GTC; 3 fuel accessories

Nitrile gloves, ambient ventilation

Acceptable. Short duration and amount, mild irritant.

Operating Test Stands – noise Intermittently to

6 hours daily

4 Ear plugs and ear muffs

Unacceptable. Sound levels reach 104 dBA, requires double hearing protection (ear plugs and ear muffs),…