A defective address information encoding method for a memory array is provided. The method and apparatus allows a receiver to recognize data in a packet lost due to data loss occurring in a network. The light source is capable of transmitting a light beam modulated according to a modulation scheme for information transmission. A plurality of high efficiency particulate air filters is positioned in the housing downstream of the filter bags with respect to the flow of air through the housing. The container has a mechanically operated sealing mechanism that allows a user to seal the waste storage film by depressing an actuator.