A method and apparatus for a dedicated cache memory are described. An accumulation of bio-gases is held captive between the membrane cover and the liquid surface in a central region of the reservoir relative to the gas passage, by a flap-valve attachment condition extending between the accumulation of bio-gases and the gas passage. A second database is populated with one or more business rules, wherein each business rule is associated with one or more of the indexed objects. The WTRU releases the ARQH-ARQ process if an acknowledgement message has been received, and retransmits the data if a non-acknowledgement message or no feedback information has been received in a predetermined time period while incrementing a transmission counter in the WTRU.