to  reporting  the  work  completed  or  signing  off  the VIDS/MAF. If the tool cannot be located, notify the maintenance officer or assistant maintenance officer via the work center supervisor and maintenance control to ensure that the aircraft or equipment is not released. If the tool cannot be located after the maintenance officer’s   directed   search,   the   person   doing   the investigation will personally sign a statement in the Corrective Action block of the VIDS/MAF that a lost tool  investigation  was  conducted  and  that  the  tool  could not be found. Subsequently, the normal VIDS/MAF completion  process  will  be  followed. The flight engineer/crew chief (senior maintenance man  in  the  absence  of  an  assigned  crew  chief)  will assume  the  responsibilities  of  the  work  center supervisor applicable to the TCP in the event of in-flight maintenance or maintenance performed on the aircraft at other than home station. OCCUPATIONAL AWARENESS Learning   Objective:   Identify  sources  of information  regarding  hazards  within  the  AM rating  and  recognize  terms  applicable  to hazardous situations and materials. Many different materials are used in the workplace. Some are hazardous. You must know where to retrieve information on these materials used in and around naval aircraft.  The  MIMs  give  information  on  correct maintenance  practices,  but  may  not  always  give complete   information   regarding   necessary   safety practices. The   Navy   Occupational   Safety   and   Health (NAVOSH) program was established to inform workers about  hazards  and  the  measures  necessary  to  control them.  The  Department  of  Defense  has  established  the Hazardous  Material  Information  System  (HMIS), which is designed to acquire, store, and disseminate data on  hazardous  material  procured  for  use.  The  primary source  for  you  to  get  the  necessary  information  before beginning  any  operation  involving  the  use  of  hazardous material is the Material Safety Data Sheet (MSDS). The MSDS, known as Form OSHA-20, is shown in figure 3-2.  This  nine-section  form  informs  you  of  hazards involved,  symptoms  of  exposure,  protective  measures required, and procedures to be followed in case of spills, fire, overexposure, or other emergency situations. The maintenance of safe and healthful working con- ditions is a chain-of-command responsibility. Imple- mentation begins with the individual sailor and extends to  the  commanding  officer.  The  chain-of-command responsibilities  are  covered  in  OPNAVINST  5100.19B and   OPNAVINST   5100.23B. Work center supervisors are responsible for training work  center  personnel  in  the  use  of  the  MSDS. Furthermore,  they  must  ensure  that  personnel  under their supervision have been trained on the hazards associated with the material and are equipped with the proper   protective   equipment   prior   to   using   any hazardous  materials. All sections of the MSDS form are important, and contain  information  to  accomplish  a  task  without causing damage to equipment or personnel. Always ensure that you are using the correct MSDS with the material being used. You should check the MILSPEC, part number, federal stock number, and the name of the manufacturer.  Never  use  the  MSDS  with  different manufacturers. The formula for a given product may differ and still meet the specifications requirements. The handling  and  safety  requirements  will  effectively change  based  on  different  manufacturers. Threshold Limit Value (TLV) in sections II and V of  the  MSDS  are  established  by  the  American Conference  of  Governmental  Industrial  Hygienists (CGIH). TLVS refer to airborne concentrations of a substance  and  represent  conditions  that  nearly  all workers may be exposed, day after day, without adverse effects. You should know the effects of overexposure and  the  emergency  procedures  required  prior  to  using any material. We have been taught about incompatibility, such as the mixing of oil and oxygen. Section VI (Reactivity Data) of the MSDS contains a list of materials and conditions to avoid that could cause special hazards. Prompt cleanup of spills and leaks will lessen the chance of personnel and the environment being harmed. Section VII (Spill or Leak Procedures) of the MSDS lists the required  steps  to  be  taken  for  cleanup  and  proper disposal   methods. You should familiarize yourself and comply with section VIII (Special Protective Information) of the MSDS. In doing so, you will protect yourself and others from dangerous exposure. Some protective equipments are complex and require special training in proper use and care. Never use a respirator that you have not been tit-tested to wear. Always check to see that the cartridge installed meets the requirements of the MSDS. If you use a respirator you have not been trained for or fitted to, or with the wrong cartridge installed, it can be as dangerous to your health as wearing no protection at all. 3-3