CLEAN HARBORS INC

Ticker: CLH CUSIP: 184496107 Class: EQTY

IRONWOOD INVESTMENT MANAGEMENT LLC's Holding History (CIK: 0001127761)

Note: Option positions (PUT/CALL) are excluded.

Q4 2013

Shares 9,350 Value ($000) $561 Avg Close $57.66 Range $51.77 - $64.12

Q3 2013

Shares 9,350 Value ($000) $548 Avg Close $55.80 Range $50.23 - $59.80

Q2 2013

Shares 9,350 Value ($000) $472 Avg Close $55.73 Range $50.37 - $61.28

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2013	9,350	$561	$57.66	$51.77 - $64.12
Q3 2013	9,350	$548	$55.80	$50.23 - $59.80
Q2 2013	9,350	$472	$55.73	$50.37 - $61.28