Security Management Department - Building 302
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The following hazards have been identifed during the most recent routine Industrial Hygiene survey conducted 9 and 10 September 2015. The routine industrial hygiene survey process evaluates potential hazards to employees based on existing operations at the time of the survey. It is the responsibility of the Lab/Space Manager to report any changes in/new operations that could alter/introduce health hazards and exposures involved so that the new conditions and resulting exposures can be properly evaluated. To report changes, complete this form and email to Safety@nps.edu for review. The NPS Safety Office will then contact the servicing BUMED Industrial Hygienist for possible further actions.
Examples of changes that the need to be reported include the following:
- new operations with suspected health hazards are performed
- new chemical products are used
- an increase in major chemical usage
- new equipment with potential noise hazards is used
- other new equipment posing suspected or known health hazards, such as lasers, is used
- exposure frequency and time changes of operations with potential or known health hazards
- a change in local exhaust ventilation systems
Full Industrial Hygiene Reports for this space may be found at this page.
- This department provides students with access to classified information and computer systems, controls all classified material, and processes security investigations and clearances.
- Several paper shredding machines of the same manufacturer and model are used to shred documents.
- A paper mulching machine located in a separate room is used to destroy classified documents. A vacuum/filter dust bag system is attached to the machine during this process to reduce the amount of airborne dust generated by the process. A Shop Vac vacuum is used to clean up any accumulated dust on surfaces after the mulching process is complete. The ductwork leading from the vacuum system serves as an automatic procedure to minimize the buildup of dust on room surfaces generated by the mulching process.
- Hard disk drives (HDs) are very occasionally destroyed by use of the Room B05 ITACS STBL Section’s Disk Mutilator and Degausser machines, and DVD Shredder Destroyer machine.
Engineering/Work Practice Controls:
- Calculations indicate the operator of the paper mulching machine will be overexposed to noise if usage exceeds 1 hour, 45 minutes per day since the very high noise level will exceed the attenuation afforded by wearing of both Howard Leight Thunder 29 ear muffs (manufacturer NRR of 30 dB) and fitted, reusable ear plugs. It is recommended that the users maintain a log of the mulching machine’s use to include the date and total time of usage for that day to serve as documentation that the 1 hour, 45-minute time limit is not exceeded. If the department cannot comply with this administrative exposure control and needs to perform mulching for longer time periods, contact the Industrial Hygienist to schedule personal noise monitoring (noise dosimetry) so that the operator’s actual 8-hour average noise exposure can be better defined through quantitative means rather than being estimated through calculations using the measured noise level and estimated duration of operation.
- A vacuum system is attached by ductwork to the bottom of the paper mulching drum to minimize the amount of airborne dust created. A dust filter bag is attached to the vacuum system to collect most of the dust located inside the machine and created during the mulching process.
Respiratory Protection Program:
Operations requiring the use of respirators are not performed in this space.
One Employee electively wears either 3M Model 8210 or Moldex Model 2200 N95 disposable respirators during mulching and when removing the 8-foot tall dust collection bag (for placement on a cart for disposal of the very fine dust created in an outside dumpster). Based on monitoring data collected during a virtually identical process performed at the NPS Library, nuisance dust exposures are expected to be insignificant, and respirator usage is optional.
Any employee wishing to wear a respirator (including dust masks) must contact the NPS Respiratory Protection Program Manager (RPPM) to recieve OSHA mandated training (Per OSHA 1910.134 App D) and approval.
Lead Control Program:
There is no lead present in this space.
Hearing Conservation Program:
Exposure to hazardous noise levels is limited to operation of the paper mulching machine. The entrance to the mulching room is properly posted as a noise hazardous area with a large NAVMED 6260/2 sign that notes required use of double hearing protection per BUMEDNOTE 6260 BUMED-M44 of 26 May 15, enclosure (1), paragraphs 5 and 6. Supplemental smaller NAVMED 6260/2A noise hazard labels are also attached to the mulching machine. The current survey identified that only one worker currently performs this work, and because his 8-hour average exposure is significant, he is required to continue:
- receiving annual audiograms (hearing tests) as required by OPNAVINST 5100.23G, Chapter 18, Section 1806
- receiving annual hearing conservation training as required by OPNAVINST 5100.23G, Chapter 18, Section 1808
- wearing of both ear plugs and muffs during operation of the mulching machine as required by 29 CFR 1910.134, enclosure (1), paragraphs 5 and 6.
- Maintain a use log to assure users do not exceed 1 hour and 45 minutes of use per day as described above under the Engineering Controls Section.
Other measured non-hazardous noise:
The most recent IH survey newly identified the occasional use of the hard disk drive mutilator machine belonging to the ITACS Department’s STBL section located in Room B05; although its momentary (approximate one-second duration) noise level reaches 92 dBA (which is above the Navy criterion level of 85 dBA outlined in BUMEDNOTE 6260 BUMED-M44 of 26 May 15, enclosure (1), paragraph 1), hearing protection is deemed unnecessary during its operation as allowed by OPNAVINST 5100.23G, Chapter 18, paragraph 1804b(3) due to its extremely short total exposure time per day (at most 3 to 5 times per day for a total of less than 10 seconds per day).
The measured noise levels of the following equipment are below the Navy criterion level outlined in BUMEDNOTE 6260 BUMED-M44 of 26 May 15, enclosure (1), paragraph 2, and thus do not require the use of hearing protection during operation:
- Shop Vac vacuum used for dust cleanup in the mulching room and other locations within the department
- paper shredding machines (of the same manufacturer and model) located in two hallway locations and in the front office (Room B13).
- the department’s computer server rooms
- the ITACS STBL section’s Room B05 DVD/CD shredding and degaussing machines occasionally used by the department member who operates the mulching machine
Personal Protective Equipment (PPE):
|Paper Mulching||Ear Muffs AND Ear Plugs|
Use of PPE during other operations to control exposure to occupational health hazards is unnecessary. The measured nuisance dust exposure level during operation of a similar paper destroying machine used in the Dudley Knox Library is below the OEL; therefore, similar levels are expected during this department’s paper mulching process.
Occupational Reproductive Hazards Program:
Per OPNAVINST, Chapter 29, the only reproductive hazard posed is noise from use of the paper mulching machine, which presents a reproductive hazard only to pregnant women.
Pregnant women, or who are trying to achieve pregnancy regardless of military or civilian status, should inform their attending health professional(s) that they perform any of these processes that exposes them to potential female, pregnant female, or developmental reproductive hazards and follow any medical guidelines provided. Female (military) students performing any of the above processes involving female, developmental, or pregnant female hazards must inform their supervisor as soon as possible that they are pregnant. They and their supervisors must then complete the Developmental Hazard Worker’s Statement Form and Supervisor’s Statement Forms. The student then must be scheduled for an appointment with an Occupational Health Physician, during which the form needs to be submitted and reviewed. All guidance provided by this process must be followed, and pregnant women should avoid or at least minimize work with the chemical products listed above that pose potential female, pregnant female, or developmental hazards, as well as avoid or at least minimize exposure while present during noise hazardous processes.
- OPNAVINST 6000.1C, para 101e(3), Appendix B, and Appendix C
- NMCPHC Technical Manual NMCPHC-TM-OEM 6260.01C,Section XII
- OPNAVINST 5100.23G, Ch 29, Para 2903d(3)
No chemical carcinogens present in this space.
Hazardous Communications (HAZCOM):
- Information on Safety Data Sheets (SDS) and how to read them is found on the NPS HAZCOM page.
- A full listing of Safety Data Sheets by storage location at NPS may be found on our SDS page
The Security Management Department does not use any chemical products except those associated with office functions, and are therefore exempt from most of the requirements of OPNAVINST 5100.23G, Chapter 7 and (c).