Sulfuric acid contaminated with byproducts of chloromethane scrubbing is regenerated for reuse in the scrubbing process by diluting with water to not lower than about a 55 weight percent concentration, heating the diluted acid to boiling at not more than about 135\xb0 C. The method can be embodied in instructions stored on a computer-readable medium. The method also includes forming a memory gate between the spaced-apart sourcedrain structures and forming a control gate disposed operatively over the memory gate. Other rogue containment methods involve wireless techniques for containing the effect of rogue access points. The interconnect connector can operate in two modes, a single mode and a differential mode. As the vertical wall moves past the stops there is a snap.