X0306 4 2016-01-04 0000742126 US ECOLOGY, INC. ECOL 0001369458 Feeler Jeffrey R 251 E. FRONT ST. SUITE 400 BOISE ID 83702 1 1 President and CEO Common Stock 2016-01-04 4 A 0 10700 0 A 57831 D Common Stock Option 35.05 2016-01-04 4 A 0 18800 0 A 2017-01-04 2026-01-03 Common Stock 18800 18800 D Performance Stock Units 2016-01-04 4 A 0 6400 0 A 2018-12-31 Common Stock 6400 6400 D Restricted stock issued pursuant to US Ecology, Inc. Omnibus Incentive Plan, vesting after the third year anniversary. Issued pursuant to US Ecology, Inc. Omnibus Incentive Plan, vesting annually over three years. Grant of Performance Stock Units. Each performance stock unit represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the performance stock units. The actual number of shares to be delivered in settlement of the performance stock units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the performance stock units. The performance stock units will settle as soon as practicable after December 31, 2018. /s/ Jeffrey R. Feeler 2016-01-05