Stock Trading History of Parry David M

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Parry David M since year 2005. The trader's CIK number is 1212692. At the time of this reporting, Parry David M is the EVP CHESI of Clean Harbors Inc . (stock ticker symbol CLHB). See this page for all insider trading activities at Clean Harbors Inc .

Stock purchases, sales, and option exercises reported by insider *Parry David M* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-08-29	CLHB	Clean Harbors Inc	Option Exercise	2,500	7.62	19,050
2008-08-29	CLHB	Clean Harbors Inc	Sale	2,500	82.08	205,200
2006-09-27	CLHB	Clean Harbors Inc	Sale	2,000	42.23	84,460
2006-09-27	CLHB	Clean Harbors Inc	Option Exercise	2,000	2.26	4,520
2006-08-21	CLHB	Clean Harbors Inc	Sale	5,000	41.45	207,250
2006-08-21	CLHB	Clean Harbors Inc	Option Exercise	5,000	2.06	10,325

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Parry David M (EVP CHESI of Clean Harbors Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.