CH2M HILL, INC.

EMERGING CONTAMINANTS INVESTIGATION AT JOINT BASE CAPE COD, MASSACHUSETTS

TASK ORDER TITLE: REMEDIAL DESIGN (RD) TASK ORDER FOR THE AMERICAN CREOSOTE SITE THE PURPOSE OF THIS MODIFICATION NO. 16 IS TO MAKE AN ADMINISTRATIVE CORRECTION TO THE TASK ORDER AWARD AMOUNT AND OBLIGATION AMOUNT.

JASPER CREOSOTING LTRA THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE FUNDS.

TAR CREEK OU5 RIFS THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE FUNDS.

TAR CREEK OU4 SOURCE MATERIAL RA THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE FUNDS.

HART CREOSOTING LTRA THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE FUNDS.

GAY MINE RI/FS OVERSIGHT MOD P00010: DE-OBLIGATE EXCESS FUNDS AND CLOSE OUT

UPPER COLUMBIA RIVER SITE - MOD P00016: DE-OBLIGATE EXCESS FUNDS AND CLOSE TASK ORDER

PREPARE THE 2020 FIVE-YEAR REVIEW REPORT FOR THE BUNKER HILL/COEUR D'ALENE BASIN SUPERFUND SITE MOD P00003: DE-OBLIGATE EXCESS FUNDS AND CLOSE OUT

REMEDIAL ACTION OVERSIGHT FOR MIDNITE MINE SUPERFUND SITE P00012: DE-OBLIGATE EXCESS FUNDS AND CLOSE OUT

WARM SPRINGS PONDS O&M OVERSIGHT P00011: DE-OBLIGATE EXCESS FUNDS AND CLOSE OUT THE TASK ORDER

BALLARD MINE SF SITE: TECHNICAL SUPPORT FOR OVERSIGHT OF PRP-LEAD CERCLA RI/FS P00009: CORRECT ACCOUNTING CODES FOR THIS EXPIRED TASK ORDER

TASK ORDER TITLE: GRANTS CHLORINATED SOLEVENTS THE PURPOSE OF THIS MODIFICATION NO. 20 IS TO DE-OBLIGATE FUNDS AND REDUCE EXPENDITURE LIMIT/CEILING FROM THIS EXPIRED TASK ORDER.