Dec 28, 2000

Microbics Negotiating Agreement for Mexico Wastewater Treatment

Waste Management, Inc., a wholly owned subsidiary of U.S. Microbics, Inc.,
announced the negotiation of a license agreement with Cyla Engenieria, S. A. De.
C. V., a partnership headquartered in Mexicali, Baja, Calif., through which
Sub-Surface’s Wasteline proprietary microbial products for enhancing
wastewater treatment plant operation and industrial sewage treatment would be
marketed and distributed throughout Mexico.

Engenieria received permits from Mexico's Secretaria de Relationes Exteriores to
provide engineering support to businesses and governmental agencies in Mexico
including importation and sale of proprietary microbial blends provided by

municipal wastewater treatment plants and industrial wastewater producers are
exceeding treatment system capacity and are facing multimillion dollar
investments for new treatment plants.

license agreement is expected to provide Cyla Engenieria and its U.S. affiliate
a license to market and distribute U.S. Microbics Wasteline products throughout
Mexico, Arizona and California.

U.S. Microbics, Inc.)