| Date | Event |
| 9-Nov-09 | CLEAN HARBORS INC Files SEC form 10-Q, Quarterly Report |
| 4-Nov-09 | Clean Harbors Earnings Call scheduled for 9:00 am ET today |
| 4-Nov-09 | CLEAN HARBORS INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 30-Sep-09 | CLEAN HARBORS INC Files SEC form 8-K/A, Financial Statements and Exhibits |
| 21-Sep-09 | CLEAN HARBORS INC Files SEC form 8-K/A, Financial Statements and Exhibits |
| 20-Aug-09 | CLEAN HARBORS INC Files SEC form 8-K, Entry into a Material Definitive Agreement, Creation of a Direct Financial Obli |
| 7-Aug-09 | CLEAN HARBORS INC Files SEC form 10-Q, Quarterly Report |
| 3-Aug-09 | CLEAN HARBORS INC Files SEC form 8-K, Financial Statements and Exhibits |
| 3-Aug-09 | Clean Harbors Earnings Call scheduled for 9:00 am ET today |
| 14-May-09 | CLEAN HARBORS INC Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and Exhibits |
| 8-May-09 | CLEAN HARBORS INC Files SEC form 10-Q, Quarterly Report |
| 6-May-09 | CLEAN HARBORS INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 30-Apr-09 | CLEAN HARBORS INC Files SEC form 8-K, Entry into a Material Definitive Agreement, Unregistered Sale of Equity Securit |
| 16-Mar-09 | Price hit new 52-week low ($40.90) |
| 13-Mar-09 | CLEAN HARBORS INC Files SEC form 8-K, Change in Directors or Principal Officers, Other Events, Financial Statements a |
| 12-Mar-09 | Price hit new 52-week low ($41.70) |
| 10-Mar-09 | Price hit new 52-week low ($41.88) |
| 9-Mar-09 | CLEAN HARBORS INC Files SEC form 8-K, Change in Directors or Principal Officers |
| 2-Mar-09 | CLEAN HARBORS INC Files SEC form 10-K, Annual Report |
| 25-Feb-09 | CLEAN HARBORS INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 8-Jan-09 | CLEAN HARBORS INC Files SEC form 8-K, Change in Directors or Principal Officers |
| 15-Dec-08 | CLEAN HARBORS INC Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and Exhibits |
| 3-Dec-08 | CLEAN HARBORS INC Files SEC form 8-K, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; |