EA ENGINEERING, SCIENCE, AND TECHNOLOGY, INC., PBC

THE PURPOSE OF THIS UNILATERAL MODIFICATION IS TO DE-OBLIGATE UNUSED FUNDS IN PREPARATION FOR CLOSE-OUT.

MODIFICATION TO INCREASE THE LEVEL OF EFFORT (LOE) HOURS AND ADD INCREMENTAL FUNDING TO TASK 5.5.1.2

STATE ROAD 114 ESO THE PURPOSE OF THIS MODIFICATION IS TO EFFECTUATE AN APPROVED CHANGE ORDER INCREASING THE LEVEL OF EFFORT BY 1175 HOURS IN THE AMOUNT OF $121,764.69 FROM 1 OCTOBER 2025 TO 30 SEPTEMBER 2026.

THE FBI IS PURCHASING UXO TECHNICIAN SUPPORT SERVICES. THE UXO TECHNICIAN WILL BE ON LOCATION DURING ALL EXCAVATION FOR PROJECTS LOCATED IN THE AREA DESIGNATED BY MCBQ AS SITE UXO33. THE UXO TECHNICIAN WILL BE LOOKING FOR ANY UNEXPLODED MUNITIONS.

DEOBLIGATE FUNDS FROM THE FOLLOWING: CLIN TASK BALANCE 0001CA QAPP REVIEW $218.93 0005B TECH ASSISTANCE $6,610.42

TEN MILE DRAIN RA DEOBLIGATE EXCESS FUNDS

NEW RAF ESO TASK ORDER FOR BILLINGS PCE OU1&2, RI/FS THRU ROD.

68HE0322F0004 P0005, HARVEY & KNOTTS SUPERFUND SITE FUNDS CLIN 4.1, RI/FS IN THE AMOUNT OF $41,671.00.

KINNEYTOWN ELUTRIATE ANALYSIS CONTRACT FOR EPA REGION 1 TBA PROGRAM FOR SITE AT KINNEYTOWN DAM, CT

OPTION PERIOD 4/YEAR 5 C/O/RESTORATION, SUPPLEMENTAL AGREEMENT TO ADD FUNDING TO CLIN 0006.

PSC AJ13 GSA OASIS TO LAB AND FIELD STUDY SUPPORT RELATED TO PFAS RESEARCH OF INNOVATIVE MEASURES FOR CHARACTERIZING CONTAMINATED SEDIMENT SITES

R7 ESO: HASTINGS GROUNDWATER SITE COLORADO AVE. OU1 TECHNICAL SUPPORT FOLLOW ON MOD P00002: TERMINATE FOR THE CONVENIENCE OF THE GOVERNMENT

PSC AJ13 GSA OASIS TO LAB AND FIELD STUDY SUPPORT RELATED TO PFAS RESEARCH OF INNOVATIVE MEASURES FOR CHARACTERIZING CONTAMINATED SEDIMENT SITES

P00002 IS TO FUND CLINS/OPTIONAL TASKS

RES - DOVER GAS LIGHT CO.

ESO TASK ORDER TITLE: REGION 6 ESO REMEDIAL ACTION (RA) OVERSIGHT SUPPORT SERVICES AT THE EAST 67TH STREET GROUND WATER PLUME SUPERFUND SITE LOCATED IN ECTOR COUNTY, TEXAS MODIFICATION P00009 IS TO ADD FUNDING AND EXERCISE OPTIONAL TASK/CLINS.

VBI70 - RAF DES

EAST BASIN ROAD GROUNDWATER (A36K) OU01 $1,000,000.00 DES/EA ENGINEERING, CONTRACT: 68HE0318D0005, TASK ORDER: NEW GOVT RIFS: TO AWARD OF A NEW DES TASK ORDER FOR THE EAST BASIN ROAD GROUNDWATER SUPERFUND SITE. THIS WORK WILL INCLUDE A REMEDIAL IN

DESIGN AND ENGINEERING SERVICES. AFTERTHOUGHT MINE TECHNICAL SUPPORT, REMEDIAL INVESTIGATION FEASIBILITY STUDY. THE PURPOSE OF THIS TASK ORDER IS FOR THE CONTRACTOR TO PROVIDE TECHNICAL SUPPORT TO US EPA PER THE SOLICITATION.

SELMA PRESSURE TREATING SUPERFUND SITE THROUGH SITE-SPECIFIC TECHNICAL ASSISTANCE TO CONDUCT EPA-LEAD REMEDIAL INVESTIGATION/FEASIBILITY STUDY, ENGINEERING EVALUATION AND COST ANALYSIS, AND/OR REMOVAL ACTION PHASES AS REQUIRED BY THE COMPREHENSIVE EN

LOWER ROUGE RIVER - OLD CHANNEL (LRROC) REMEDIAL ACTION (RA) OVERSIGHT AND SPLIT SAMPLING MODIFICATION P00006 - FUNDING ACTION ONLY

THIS MODIFICATION EXTENDS THE PERIOD OF PERFORMANCE END DATE FROM OCTOBER 25, 2025 TO OCTOBER 25, 2027 TO SUPPORT THE REMAINING DOR SERVICES THROUGHOUT THE OU2 RA CONSTRUCTION AND ADDS FUNDS IN THE AMOUNT OF $167,200.74 FOR ADDITIONAL PROJECT MANAGEM

NEW DES TASK ORDER - BLUE LEDGE MINE (SSID 09MM) - THE PURPOSE OF THIS MODIFICATION IS TO OBLIGATE BASE YEAR OPTION TASKS PERIOD OF PERFORMANCE 09/26/2024 - 09/25/2026.

RAF ESO TASK ORDER LORENTZ BARREL AND DRUM OVERSIGHT AND RA SUPPORT BILATERAL MODIFICATION FOR CHANGE ORDER 2.

RAF DES TASK ORDER FOR COPPER BLUFF MINE REMEDIAL INVESTIGATION/FEASIBILITY STUDY (RI/FS) - THE PURPOSE OF THIS MODIFICATION IS TO FUND LINE ITEM 0038 WHICH IS NOT FUNDED IN MOD 1.

KEYSTONE OU1 RA OBLIGATE FUNDS, EXTEND POP, AND APPROVE RFI 001

MONITOR DEVICES REMEDIAL ACTION

NPS CONTAMINATED SITE CLEANUP BPA - GOLD HILL DEBRIS REMOVAL - WRST

WATSON JOHNSON LANDFILL TASK ORDER UNDER THE DES CLIN 0001 SUITE OF CONTRACTS.

NPS CONTAMINATED SITE CLEANUP BPA - GAAR VAPOR SAMPLING

CONDUCT GROUNDWATER MONITORING AT THREE LOCATIONS WITHIN BROOKS CAMP IN KATMAI NP, ALASKA.

OPTION PERIOD 2/YEAR 3, WS/SCSA SF, DEOBLIGATION OF NO-YEAR FUNDS AND PERIOD OF PERFORMANCE EXTENSION, OUT TO 01 MARCH 2026.

PSC AJ13 GSA OASIS TO LAB AND FIELD STUDY SUPPORT RELATED TO PFAS RESEARCH OF INNOVATIVE MEASURES FOR CHARACTERIZING CONTAMINATED SEDIMENT SITES

RAF DES TASK ORDER FOR COPPER BLUFF MINE REMEDIAL INVESTIGATION/FEASIBILITY STUDY (RI/FS) - THE PURPOSE OF THIS MODIFICATION IS TO CORRECT FUNDING BY DE-OB.

DEOBLIGATE EXCESS OPTION YEAR 2 FUNDS IN THE AMOUNT OF $

REMEDIAL ACQUISITION FRAMEWORK (RAF), DESIGN AND ENGINEERING SERVICES (DES) SULPHUR BANKS RESIDENTIAL RD. THE PURPOSE OF THIS MODIFICATION IS FOR A 3 MONTH EXTENSION FOR THE PERIOD OF PERFORMANCE 12/10/25 - 3/10/26.

FY25 FIVE-YEAR REVIEWS AT MULTISITE SUPERFUND SITES SUPPORT. THE PURPOSE OF THIS MODIFICATION IS INCLUDE AN INCREASE TO OPERATING INDUSTRIES INC.

RAF DES TASK ORDER FOR ARGONAUT MINE RI/FS- THE PURPOSE OF THIS MODIFICATION IS TO EXERCISE OPTION YEAR 1 FOR THE PERIOD OF PERFORMANCE SEPTEMBER 30, 2025 - SEPTEMBER 29, 2026.

RAVENSWOOD PCE - MOD 16 EA ENVIRONMENTAL SERVICES AND OPERATIONS (ESO) THE PURPOSE OF THIS TASK ORDER IS TO OPERATE AND MAINTAIN THE IN-SITU AIR SPARGING WITH SOIL VAPOR EXTRACTION (AS/SVE) SYSTEM AS PART OF THE GROUNDWATER REMEDY WITHIN OPERABL

RAF DES TASK ORDER FOR COPPER BLUFF MINE REMEDIAL INVESTIGATION/FEASIBILITY STUDY (RI/FS) - THE PURPOSE OF THIS MODIFICATION IS TO EXERCISE AND FUND OPT 1.

MCCOLL FULLERTON SUPERFUND SITE TECHNICAL OVERSIGHT SUPPORT. THE PURPOSE OF THIS MODIFICATION IS TO CORRECT THE AMOUNT DISPLAYED IN BLOCK 17H OF THE OF347, FROM $2,001,064.86 TO $2,261,283.47.

OKLAHOMA/ARKANSAS GROUP OPTIMIZED REMEDIATION CONTRACT (ORC), MOD P00010 - EX OPTIONS AND EXTEND POP.

NORTH 5TH STREET GROUNDWATER CONTAMINATION SUPERFUND SITE: REGION 5, SUPERFUND & GREAT LAKES ARCHITECTURE & ENGINEERING SERVICES (SFGLAES), SEMD, EA (68HE0523D0006), REMEDIAL INVESTIGATION (RI) TASK ORDER

PHASE I REMEDIAL INVESTIGATION OF PER- AND POLYFLUOROALKYL SUBSTANCES (PFAS) AT JOINT BASE ANDREWS, MARYLAND

THE PURPOSE OF THIS BILATERAL MODIFICATION IS TO EXERCISE OPTIONAL CLIN 0007 AND 0009. THE NOTICE OF INTENT TO EXERCISE OPTIONS, INCLUDING ADJUSTING THE CLIN 0009 PERIOD OF PERFORMANCE START FROM 5 SEPTEMBER 2026 TO 5 SEPTEMBER 2025

REMEDIATION SERVICES AT FORMER NIKE BATTERY PR-58 AND DISASTER VILLAGE TRAINING AREA OF THE FORMERLY USED DEFENSE SITE IN NORTH KINGSTOWN, RHODE ISLAND.

SPRING PARK MUNICIPAL WELL FIELD (C51T): REGION 5, SFGLAES, SEMD, EA (68HE0523D0006), RI/FS TO

THE PURPOSE OF THIS ADMINISTRATIVE MODIFICATION IS TO EXTENDED OPERATION OF THE IN-SITU THERMAL TREATMENT (ISTT) SYSTEM TO TREAT ALL THE CONTAMINANT MASS TO MEET THE CRITERIA ESTABLISHED IN THE PWS IN A TIMELY MANNER. THIS IS A REMEDIATION ACTION

INTERIM SOIL REMEDIAL ACTIONS AND GROUNDWATER MONITORING FORMER FUEL DISPENSER ISLAND SITE CUSICK SURVIVAL SCHOOL, FAIRCHILD AFB, PEND OREILLE COUNTY, WASHINGTON

FY25 FIVE-YEAR REVIEWS AT MULTISITE SUPERFUND SITES SUPPORT. THE PURPOSE OF THIS MODIFICATION IS TO ADD FUNDING TO PHOENIX-GOODYEAR AIRPORT NORTH AND SOUTH.