CLEAN HARBORS INC — Director's Dealing 2013

May 7, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CLEAN HARBORS INC (CLH)
CIK: 0000822818
Period of Report: 2013-05-06

Reporting Person: TWOHIG MICHAEL J (EVP (CHESI))

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-06	Common Stock	A	1540	$.00	Acquired	21253	Direct
2013-05-06	Common Stock	A	2053	$.00	Acquired	23306	Direct

Footnotes

F1: Restricted Stock Award vesting as to 60% on March 15, 2016; 20% on March 15, 2017; and 20% on March 15, 2018

F2: Performance-Based Restricted Stock Award that will vest, depending on achievement of goals, as to 33% on March 15, 2015; 33% on December 15, 2015; and 34% on December 15, 2016