MIL-PRF-24699A (SH)
6.3 Fabrication. There are many material combinations that potentially could meet the requirements of
this document. Two possible material combinations are as follows. Type I barrier material may consist of barium
sulfate-loaded vinyl with fibrous glass cloth facing. Type II barrier material may consist of wire screen mesh, hot
roll bonded to lead sheathing. However, if barrier materials are fabricated from these components, there is no
assurance that they will meet all the requirements of this document.
6.4 Material safety data sheets. Contracting officers will identify those activities requiring copies of
completed Material Safety Data Sheets prepared in accordance with FED-STD-313. In order to obtain the MSDS,
FAR clause 52.223-3 must be in the contract.
6.5 Toxicity evaluation. The NAVENVIRHLTHCEN requires sufficient information to permit a HHA of
the product. Any questions concerning toxicity, information required to conduct a HHA, and requests for a HHA
should be addressed to the Commanding Officer, Navy Environmental Health Center, ATTN: Hazardous Materials
Department, Industrial Hygiene Directorate, 620 John Paul Jones Circle, Suite 1100, Portsmouth, VA 20378-
2103. Upon receipt of the HHA, a copy should be provided to Commander, Naval Sea Systems Command, ATTN:
SEA 05M3, 1333 Isaac Hull Ave., SE, Stop 5133, Washington Navy Yard, DC 20376-5133.
6.6 Off-gassing. Materials to be installed in submarines are to be controlled to prevent off-gassing, which
contaminates the atmosphere and results in health hazards to personnel or deleterious effects on machinery. These
controls are accomplished through the Submarine Material Control Program, which is described in the Nuclear
Powered Submarine Atmosphere Control Manual, NAVSEA Technical Manual S9510-AB-ATM-010 Rev 2. Under
the Submarine Material Control Program, all materials considered for use on submarines require certification and
assignment of a usage category. Under the certification process, candidate materials are selected by Navy
activities or contractors, and a request for certification is submitted to Commander, Naval Sea Systems Command,
ATTN: SEA 05Z9, 1333 Isaac Hull Ave., SE, Stop 5122, Washington Navy Yard DC 20376-5122. The certification
request is accompanied by detailed information, including descriptions of the material. A chemical analysis is
conducted, which is normally accomplished through off-gas testing. The off-gas test is required to be conducted in
a Government approved laboratory designated by the preparing activity. Information pertaining to this test
requirement may be obtained from Commander, Naval Sea Systems Command, ATTN: SEA 05Z9, 1333 Isaac Hull
Ave., SE, Stop 5160, Washington Navy Yard, DC 20376-5160. Based on the chemical analysis results, a usage
category is assigned to the material defining whether, and to what extent, the material may be used on submarines.
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