From 2002-05, the last variance period, the airport reduced the amount of land close to the airport affected by noise through its acoustical treatment program from 214 acres to 61 acres, Gill said.
The airport helps outfit 175 residential units a year in the affected area with sound-proofing measures and about 600 units remain untreated, Gill said.
During the previous variance period, the airport received nearly $40 million in federal and airport funding for the acoustical treatment program and, with continued funding, could soundproof all homes by 2011, he said.