Envirogen, Inc.. The Company's principal activities are the commercial remediation, waste treatment and research activities to determine when advanced biological treatment systems are appropriate to treat hazardous waste. The products and services of the Company are classified under commercial operations and research and development services. Commercial operations is comprised of business units which offer products and services to address the hazardous waste clean-up and treatment needs of a variety of customers. The developmental efforts focus on identifying and developing innovative techniques to address pollution problems through the isolation of naturally occurring organisms, enhancement of their performance and the design of advanced systems to optimize their activity for the biodegradation of various compounds in soil, water and air. Commercial operations accounted for 93% of 2001 revenues and research and development services, 7%.