A static Random Access Memory has a sense enable circuit. The present invention additionally provides a method and apparatus for monitoring cleanup from a leveling off of viscosity or density over time, measuring or estimating bubble point for formation fluid, measuring or estimating dew point for formation fluid, and determining the onset of asphaltene precipitation. The first compartment serves for interaction between the water and at least one species of aerobic heterotrophic microorganism which are adapted to break down one or more organic contaminants in the contaminated water. Suitable materials for the buffer layer that have been found to be effective include silicon oxide and silicon oxynitride with the latter offering some additional advantages over the former. The substrate containing glass forming raw materials may be formed so as to have a Young’s modulus of 110 or higher.