This paper presents a case study in the application of the batch activated sludge process. This particular application of this technology is somewhat unique in that it was instituted in place of a completely new physical/chemical treatment facility which was found to be incapable of meeting the permit requirements. To complicate the situation, the POTW to which the plant discharges was under consent order and absolutely could not permit excursions beyond specified limits. Plant shutdown was threatened. Although not uncommon to the consulting business, the project carried with it an almost impossible time constraint.