This treatment plant, with some modifications, has an existing discharge permit and outfall and available capacity to meet the future needs of the 23 municipalities.

Airport deicing effluent guidelines - Airports are required to obtain stormwater discharge permits and ensure that wastes from deicing operations are properly collected and treated.

Laidlaw, now the Safety-Kleen Corporation, an industrial and hazardous waste management service based in Columbia, S.C., subsequently closed the incinerator but retained its discharge permit.

But a district can request hearings on matters concerning discharge permits, a procedure the environmentalists fear will be used to delay the capping of nitrogen levels.

The discharge permit gives the establishment a legal right to dispose their waste water in the Laguna de Bay region.

Ms. Kurtz said the draft of a new discharge permit includes more stringent requirements for pollution control and monitoring than the one issued in 1984.

The Corps of Engineers began to issue the new discharge permits, but in 1971 a legal challenge halted the program.

Although the Field Lab is under current criticism for violating almost 50 discharge permits, state agencies have been silent on the issue.

Recently, lawyers disclosed to the California State Water Resources Control Board that over 80 exceedances of Boeing's discharge permits were found in the preceding year alone.

In 1981 there were well over 800 industrial facilities in the state with Federal and state surface-water discharge permits.