[en] The US Environmental Protection Agency (USEPA) has reported that stormwater runoff is a major cause of pollution and use impairment to waters of the nation. Diffuse pollution sources (stormwater runoff) are increasingly important as controls for industrial process dischargers. On November 16, 1990 the Federal Clean Water Act National Pollutant Discharge Elimination System (NPDES) rules governing the discharge of stormwater were published (56 FR 40948). These rules potentially affect every type of business enterprise conducting work ''associated with industrial activity.'' Dischargers of stormwater associated with industrial activity ar required to either seek coverage under a federal or state general permit using notice of intent, apply for an individual permit, or apply for a permit through a two-part group application process. Conoco, Inc. Supply and Transportation (S and T) elected the latter alternative to attempt to comply with these new evolving complex, broad-ranging permitting requirements. This paper discusses specific details of S and T's strategy, BMP designs, data acquisition activities, monitoring results, as well as economic impacts on the corporation as a result of storm water permit requirements. S and T operates approximately 170 unique wholly and jointly owned petroleum product storage and transport facilities across the nation. Approximately one-third of these facilities were subject to stormwater permit application requirements