Stock Trading History of Gerstenberg Eric W

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 Gerstenberg Eric W since year 2005. The trader's CIK number is 1211558. At the time of this reporting, Gerstenberg Eric W is the Exec. Vice President (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 *Gerstenberg Eric W* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-08-22	CLHB	Clean Harbors Inc	Sale	8,000	79.20	633,600
2008-08-22	CLHB	Clean Harbors Inc	Option Exercise	8,000	12.98	103,840
2007-04-04	CLHB	Clean Harbors Inc	Sale	8,000	45.00	360,000
2007-04-04	CLHB	Clean Harbors Inc	Option Exercise	8,000	12.98	103,840
2006-09-26	CLHB	Clean Harbors Inc	Sale	1,000	41.86	41,860
2006-09-26	CLHB	Clean Harbors Inc	Option Exercise	1,000	2.26	2,260
2006-05-05	CLHB	Clean Harbors Inc	Option Exercise	8,000	12.98	103,840

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 Gerstenberg Eric W (Exec. Vice President (CHESI) of Clean Harbors Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.