CH2M HILL, INC

RAF DES NEW TASK ORDER FOR THE MONTROSE/DEL AMO MULTI-SITE. THE PURPOSE OF THIS TASK ORDER IS TO PROVIDE TECHNICAL SUPPORT TO EPA FOR OVERSIGHT OF THE REMEDIAL INVESTIGATION, REMEDIAL DESIGN, REMEDIAL ACTION, OPERATION AND MAINTENANCE, AND FIVE-YEAR

GREAT LAKES ARCHITECT AND ENGINEERING SERVICES (GLAES) II TASK ORDER - U.S. EPA REGION 5 ROUGE CONCRETE CHANNEL REMEDIAL DESIGN

RAF DES NEW TASK ORDER FOR IRON KING MINE-HUMBOLDT SMELTER REMEDIAL DESIGN/REMEDIAL ACTION SUPPORT

REMEDIAL ACQUISITION FRAMEWORK (RAF) DESIGN AND ENGINEERING SERVICES (DES) DES PROJECT TITLE: SOUTHSIDE CHATTANOOGA LEAD SITE (SSCL) REMEDIAL DESIGN (RD) AND REMEDIAL ACTION (RA) OVERSIGHT, CHATTANOOGA, HAMILTON COUNTY, TENNESSEE, REGION 4

TASK ORDER TITLE: REGION 6 (R6) REMEDIAL ACQUISITION FRAMEWORK (RAF) DESIGN AND ENGINEERING SERVICES (DES) TASK ORDER FOR AMERICAN CREOSOTE WINNFIELD SUPERFUND SITE IN WINNFIELD, LOUISIANA REMEDIAL DESIGN (RD) IMPLEMENTATION SUPPORT AND REMEDIAL ACTI

THE PURPOSE OF THIS PROCUREMENT IS TO AWARD THE DES INDUSTRIAL WASTE PROCESSING SITE TASK ORDER FOR RI/FS AND O&M.

R7 DES: BIG RIVER OU5 (DOE RUN) REMEDIAL INVESTIGATION / FEASIBILITY STUDY (RI/FS) TECHNICAL SUPPORT

RAF DES TASK ORDER FOR REMEDIAL DESIGN AND REMEDIAL ACTION SUPPORT SULPHUR BANK MERCURY MINE OU1 MODIFICATION IS TO MOD TO ADD FUNDING AND INCORPORATE THE CONTRACTORS CHANGE PROPOSAL.

BIL FUNDED TASK ORDER - JONES ROAD GROUND WATER PLUME (DES) THE PURPOSE OF THIS MODIFICATION: 1) EXERCISE OPTIONAL CLIN 0005 (TREATABILITY STUDIES, OPTIONAL TASK 4, SOW TASK 3) 2) OBLIGATE $36,389.04 TO FUND THE CLIN 0005

FRANKLIN STREET GROUNDWATER CONTAMINATION SUPERFUND SITE: REMEDIAL ACQUISITION FRAMEWORK (RAF), DESIGN AND ENGINEERING SERVICES (DES), CLIN 0002, REMEDIAL INVESTIGATION/FEASIBILITY STUDY (RI/FS) TASK ORDER THE PURPOSE OF MODIFICATION P00007: APPROVE

THE PURPOSE OF THIS MODIFICATION IS TO ADD SARAH KELL AS TOCOR AND REMOVE YARISSA MARTINEZ AS TOCOR.

THE PURPOSE OF THIS MODIFICATION IS TO EXERCISE OPTION PERIODS, OPTIONAL TASKS, AND INCREASE LEVEL OF EFFORT FOR DRILLING COSTS.

VELSICOL CHEMICAL CORP. SUPERFUND SITE: GREAT LAKES ARCHITECT ENGINEER SERVICES (GLAES II) RD THE PURPOSE OF MODIFICATION P00017 IS TO; 1) EXTEND POP TO JULY 10TH, 2026. THIS IS A NO COST MODIFICATION.

THE PURPOSE OF THIS MODIFICATION TO OBLIGATE FUNDING IN THE AMOUNT OF $300,745 TO INCREASE THE LOE AND EXERCISE AND FUND FOR OU1 FOCUSED FEASIBILITY STUDY, REMEDIAL ALTERNATIVES EVALUATION, PROJECT MANAGEMENT, AND DATA GAP STUDY.

RAF DES TASK ORDER FOR LIBBY GROUNDWATER CONTAMINATION SF SITE, SSID: 0820. OVERSIGHT OF PRP REMEDIAL DESIGN (RD), REMEDIAL ACTION (RA), AND OPERATION & MAINTENANCE (O&M).

COR: JOHN HILLENBRAND ALTERNATE TOCOR: ERIC CANTEENWALA PRIMARY PO (PRIMARY INVOICE APPROVER): LUKE GROENVELD ALTERNATE PO: LISA OUYANG

THE PURPOSE OF THIS MODIFICATION IS TO CORRECT POPS FOR SOME OPTIONAL TASKS

REMEDIAL ACTION (RA) VELSICOL BURN PIT SITE PERIOD OF PERFORMANCE EXTENSION APRIL 30, 2026 TO AUGUST 30, 2026

R10 DES: ASARCO SEDIMENTS OPERABLE UNIT 06 (OU06) COMMENCEMENT BAY NEARSHORE/TIDEFLATS SUPERFUND SITE MOD P00003: CHANGE ORDER TO EXERCISE OPTIONAL TASK

R10 DES: UPPER COLUMBIA RIVER RI/FS OVERSIGHT MOD P00006: CHANGE TASK ORDER CONTRACTING OFFICER REPRESENTATIVE

THE PURPOSE OF MODIFICATION P00011: 1) APPROVE RFI 004 FOR OVERSIGHT NEEDED UNDER TASK A7.1.3 OU1 CLIN 2002A COST $70,718.25 FEE $4,243.10

THE PURPOSE OF THIS MODIFICATION IS TO EXERCISE AND FUND LINE ITEM - 0007B AND ADD ADDITIONAL FUNDING TO 0006C, 0007C.

CA FLAP MRN CR107(1) MUIR WOODS ROAD: ENV AND PRELIM DESIGN THE PURPOSE OF THIS MODIFICATION IS TO INCORPORATE TAR CLAUSE 1252.232-70 ELECTRONIC SUBMISSION OF PAYMENT REQUESTS BY FULL TEXT.

THE PURPOSE OF THIS MODIFICATION IS TO CORRECT THE INVOICE APPROVERS IN EAS NOT COMPLETED UNDER MODIFICATION P00005.

EXERCISE OPTION PERIOD 2