Laboratory chemicals stored in a research building at the University of California, Davis, and that are no longer useful will be destroyed on Saturday, Jan. 30. The daylong procedure will involve detonation of the chemicals near an intramural sports field behind the Fire and Police Building. Traffic on Hutchison Drive and La Rue Road may be controlled and Kleiber Hall Drive will be closed. Briggs Hall, site of the stored chemicals, will be vacated during the procedure. The chemical involved, diethyl ether, is a compound often used in biological experiments to extract fat from animal tissue. However, as the chemical ages it accumulates a contaminant, analogous to metal accumulating rust. This mixture is potentially explosive if severely jarred. Fire officials on a campus hazardous materials team have discussed disposal procedures with the Sacramento Fire Department's hazardous materials response team, local police and hazardous materials experts and a technical adviser from Aerojet. Although diethyl ether is commonplace in laboratories, the amount involved in this disposal is unusually large. Officials believe detonation is the safest disposal method for handling the 12 5-gallon containers and one 1-gallon container. The specialists organized for the disposal Saturday, Jan. 30, will follow all safety precautions. Using special containment equipment, they will carry the containers individually to a prepared location near the intramural field bordered by Hutchison Drive and La Rue Road. There they will detonate the chemicals. The procedure is expected to begin at 7 a.m. and end about nine hours later.