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WEISEL THOMAS PARTNERS ASSET MANAGEMENT LLC
> ECOL
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 03/31/2013 | US ECOLOGY, INC. | ECOL | 0 | -388,494 | 0 | -9,145,000 | |
| 12/31/2012 | US ECOLOGY, INC. | ECOL | 388,494 | 28,665 | 9,145,000 | 1,380,000 | $23.54 |
| 09/30/2012 | US ECOLOGY, INC. | ECOL | 359,829 | 192,307 | 7,765,000 | 4,793,000 | $21.58 |
| 06/30/2012 | US ECOLOGY, INC. | ECOL | 167,522 | -28,236 | 2,972,000 | -1,284,000 | $17.74 |
| 03/31/2012 | US ECOLOGY, INC. | ECOL | 195,758 | 195,758 | 4,256,000 | 4,256,000 | $21.74 |
| 12/31/2011 | US ECOLOGY, INC. | ECOL | 0 | -121,609 | 0 | -1,881,000 | |
| 09/30/2011 | US ECOLOGY, INC. | ECOL | 121,609 | 68,663 | 1,881,000 | 976,000 | $15.47 |
| 06/30/2011 | US ECOLOGY, INC. | ECOL | 52,946 | -13,603 | 905,000 | -255,000 | $17.09 |
| 03/31/2011 | US ECOLOGY, INC. | ECOL | 66,549 | 66,549 | 1,160,000 | 1,160,000 | $17.43 |
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