自社株取引日	役員・従業員名	役員・従業員の役職	株式の種類	売却／購入	株数	株価
2008-03-04	TREVATHAN, JAMES E JR	Senior Vice President	普通株式	売却	390	$32.77
2008-03-03	WEIDMAN, MARK A	President, Wheelabrator	普通株式	売却	346	$32.92
2008-03-03	ROBERTSON, GREG A	VP, Chief Accounting Officer	普通株式	購入	1,852	$0.00
2008-02-21	AARDSMA, DAVID A	Sr. VP, Sales and Marketing	普通株式	購入	3598	$0.00
2008-02-20	ROBERTSON, GREG A	VP, Chief Accounting Officer	普通株式	売却	386	$33.42
2008-02-20	FRAZIER, BRETT W	Senior Vice President	普通株式	売却	156	$33.42
2008-02-20	WOODS, DUANE C	Senior Vice President	普通株式	売却	1,003	$33.42
2008-02-20	WITTENBRAKER, RICK L	SVP and General Counsel	普通株式	売却	618	$33.42
2008-02-20	AARDSMA, DAVID A	Sr. VP, Sales and Marketing	普通株式	売却	618	$33.42
2008-02-20	ODONNELL, LAWRENCE III	President and COO	普通株式	売却	2,160	$33.42
2008-02-20	SIMPSON, ROBERT G	SVP, Chief Financial Officer	普通株式	売却	1,697	$33.42
2008-02-20	STEINER, DAVID P	Director, Chief Executive Officer	普通株式	売却	450	$33.42
2008-02-19	CADDELL, LYNN M	Senior Vice President	普通株式	購入	6,083	$33.83
2008-02-19	TREVATHAN, JAMES E JR	Senior Vice President	普通株式	購入	9,882	$33.83
2008-02-19	TREVATHAN, JAMES E JR	Senior Vice President	普通株式	売却	2,614	$33.83
2008-02-19	SIMPSON, ROBERT G	SVP, Chief Financial Officer	普通株式	購入	16,722	$33.83
2008-02-19	SIMPSON, ROBERT G	SVP, Chief Financial Officer	普通株式	売却	4,423	$33.83
2008-02-19	ROBERTSON, GREG A	VP, Chief Accounting Officer	普通株式	購入	3,803	$33.83