or shipyard, an appropriate work request must be submitted using the Ships’ Maintenance and Material Management (3-M) Manual, OPNAVINST 4790.4. HAZARDOUS MATERIAL STORAGE Certain materials with inherent hazardous properties require special stowage facilities and handling precautions. Afloat hazardous material stowage is more restrictive than shore requirements for damage control purposes. Storage requirements for each type of material are provided in OPNAVINST 5100.19, chapters C23 and D15, on the Material Safety Data Sheet (MSDS), and in NAVSUP Publication 573. MSDSs are available on the Hazardous Material Information System (HMIS), which replaced the Consolidated Hazardous Item List (CHIL). The HMIS is distributed on compact disk-read only memory (CD-ROM) format only. The HMIS in compact disk (CD) format contains both the DOD 6050.5L and DOD 6050.5LR. The CD format is issued quarterly. Each issue contains updates in its entirety. The HMIS provides the users the information needed to properly manage hazardous materials. ‘The system provides Material Safety Data Sheets (MSDSs) for standard stock numbered items, and a wide range of information concerning safety, health, packaging, and labeling. The HMIS gives a Hazard Characteristic Code (HCC) for each item, which defines the storage requirements. The HMIS also lists the transportation information and disposal code for each item. The disposal code indicates the pretreatment method and ultimate disposal action prescribed for spilled, spoiled, or other waste quantities of the item to which it applies. The HMIS does not contain information for items procured through open purchase. The Ships Hazardous Material List (SHML) is a record of the hazardous material (HM) carried aboard U.S. Navy ships for which there exists a valid requirement. The SHML provides ships with the capability of determining which hazardous materials are authorized for shipboard use to preclude stocking of materials for which the ship has no use. Materials which do not appear on the SHML should be suspect of being in excess and should not be ordered. A SHML Feedback Report can be submitted to add items to the SHML if a valid requirement exists. Quantities of materials are not provided in the SHML, nor is the SHML to be used as specific to a ship or ship class. The SHML is a list of HM that any ship with a valid need is authorized to have on board. The Material Safety Data Sheet (MSDS) in the HMIS will state in the first section whether or not the item is authorized by the SHML. NOTE: The SHML in CD format has been incorporated into the Hazardous Material Control and Management Program (HMC&M). The HMC&M in CD format contains the SHML, HMIS, and Hazardous Material User’s Guide (I-MUG). To report SHML inconsistencies or new products, use the feedback report, NAVSUP Form 1400. This form is included in the SHML on the CD and an example is illustrated in chapter 2 of NAVSUP P-485. If the item to be reported has an assigned national stock number (NSN) and application data, but not listed in SHML, submit the report directly to Naval Inventory Control Point-Mechanicsburg (NAVICP-MECH). This type of report does not require the commanding officer’s (CO’s) approval. Send an info copy of the report to the applicable type commander (TYCOM). The report for items that do not have assigned NSNS or application data and not listed in the SHML will require the CO’s approval. The report must be signed by the CO and submitted to NAVICP-MECH via the TYCOM. When procuring nonstandard HM, the request must include a copy of the approved SHML Feedback Report. The approved report will serve as required certification to procure the nonstandard HM that is not listed in the SHML. SHIPBOARD HAZARDOUS MATERIAL STOWAGE Shipboard stowage facilities commonly used for hazardous items are discussed in the following paragraphs. NOTE: FOR THE HAZARD CHAR- ACTERISTIC CODES (HCC’S) OR SMCC’S FOR THE FOLLOWING ITEMS, SEE OPNAVINST 5100.19, APPENDIX B3-E. FLAMMABLE LIQUIDS STOREROOMS The flammable liquids storeroom is normally located at either end of the ship, below the full-load waterline, not adjacent to a magazine, and is equipped with an automatic fire alarm and fire extinguishing system. This type of storeroom should also be equipped with incandescent and explosion-proof overhead lights (protected by lamp guards), with the switch located outside the compartment, and nonsparking vent fans 2-14