Stock Trading History of Oconnor William F

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 Oconnor William F since year 2005. The trader's CIK number is 1286510. At the time of this reporting, Oconnor William F is the SVP Risk Management 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 *Oconnor William F* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-06-05	CLHB	Clean Harbors Inc	Sale	4,000	73.21	292,840
2008-06-05	CLHB	Clean Harbors Inc	Option Exercise	4,000	12.98	51,920
2008-01-17	CLHB	Clean Harbors Inc	Sale	334	55.32	18,476
2007-07-12	CLHB	Clean Harbors Inc	Sale	52	52.84	2,747
2007-07-12	CLHB	Clean Harbors Inc	Option Exercise	2,000	12.98	25,960
2007-03-27	CLHB	Clean Harbors Inc	Sale	334	46.69	15,594
2006-04-05	CLHB	Clean Harbors Inc	Sale	5,000	31.11	155,550
2006-04-05	CLHB	Clean Harbors Inc	Option Exercise	5,000	12.98	64,900

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 Oconnor William F (SVP Risk Management CHESI of Clean Harbors Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.