On July 5, the Montgomery County Council voted in favor of an 1,800 tons-per-day trash incinerator, and the importation of trash into Montgomery County. Trash importation was an amendment introduced by council member Bruce Adams to reassure bondholders that recycling will not deprive this massive incinerator of fuel. But the citizens of this county should be aware that:

1) Council member Adams claims that the capacity of the incinerator has been ''down-sized to 1,800 tons per day.'' In 1986, County Executive Charles W. Gilchrist stated in a memorandum to the council that the RRF (resource recovery facility) should be sized at a nominal 1,800 tons per day. This incinerator has not been, and was never intended to be, down-sized.

2) A financial study by a Department of Environmental Protection consultant was presented for the first time to the county council on the day of the public hearing, as the council members were leaving. The cost information was withheld from the public hearing.

3) During the following work sessions the council made no reference to this report, nor, with the exception of council members William Hanna and Ike Leggett, did any council member express any concern about the burden of such a monstrous debt. The consultant's estimate of the net operating cost of the mass-burn proposal is three billion dollars, or exactly, $3,076,900,000 over 20 years.

4) The Post has failed to question the wisdom of the council in assuming a multibillion-dollar debt shielded from public eyes. It did not publish citizens' estimates, which have turned out to be accurate. Everyone seems anxious to reassure the bondholders. Nobody, except private citizens, have warned the taxpayers of this mass-burn financial trap.

On July 5, the trap closed on Montgomery County.

OLIVIER DE MESSIERES Waste Control Coalition Boyd