TETRA TECH, INC.

ENVIRONMENTAL SERVICES AT ARMSTRONG FLIGHT RESEARCH CENTER (AFRC) UNDER THE NASA ENVIRONMENTAL SUPPORT SERVICES (NESS) BLANKET PURCHASE AGREEMENT (BPA).

PSC R425 "SUPPORT FOR NONPOINT SOURCE MANAGEMENT PROGRAM PRODUCTS" P00007 - INCREMENTAL FUNDING

R425 - NUTRIENT SCIENTIFIC TECHNICAL EXCHANGE PARTNERSHIP AND SUPPORT (N-STEPS) P00007 - UPDATE ALT COR

R1 BEAL MOUNTAIN MINE REVERSE OSMOSIS WATER TREATMENT (DE-SCOPE, DE-OB)

ENVIRONMENTAL RESPONSE TRAINING PROGRAM - LARGE BPA. CALL ORDER TO MAINTAIN ERTPVU.ORG PLATFORM AND WAREHOUSE STORAGE SPACE, CONSUMABLES & TRAINING MATERIALS FOR ERTP-L TRAININGS & EXERCISES. P00002: OBLIGATE INCREMENTAL FUNDING

EMERGENCY RESPONSE TEAM (ERT) TECHNICAL SUPPORT SERVICES. P00017: DEOBLIGATION OF FUNDING.

SUPPLEMENTAL ENVIRONMENTAL IMPACT STATEMENT AND OTHER NATIONAL ENVIRONMENTAL POLICY ACT RELATED SUPPORT SERVICES AT THE CARLSBAD FIELD OFFICE AND WASTE ISOLATION PILOT PLANT - THE PURPOSE OF THIS MODIFICATION IS FOR ADMINISTRATIVE PURPOSES ONLY TO UP

USEPA RAMS PRELIMINARY ASSESSMENT - FUNDING DEOBL

ENVIRONMENTAL RESPONSE TRAINING PROGRAM - LARGE BPA. LIMITED COMBINED ADMIN & OIL CALL ORDER P00001: OBLIGATE FUNDING IN THE AMOUNT OF $197,286.98

R425 - NUTRIENT FRAMEWORK TECHNICAL SUPPORT P00009- INCREMENTAL FUNDING

OLEM LARGE MISSION SUPPORT CALL ORDER TITLE: SUPPORT FOR BROWNFIELDS TRAINING

THE PURPOSE OF THIS PURCHASE REQUISITION IS TO EXECUTE A FINAL CLOSEOUT FOR IDQ GS00Q14OADU138, TASK ORDER 693JK423F65007N, IN ITS ENTIRETY.

ENVIRONMENTAL SERVICES AT ARMSTRONG FLIGHT RESEARCH CENTER (AFRC) UNDER THE NASA ENVIRONMENTAL SUPPORT SERVICES (NESS) BLANKET PURCHASE AGREEMENT (BPA).

THE PURPOSE OF THIS MODIFICATION IS TO EXERCISE OY3, ADD AN UPDATED SOO, INCREMENTALLY FUND OY3 CLINS.

EXERCISE OY2

MINIMUM GUARANTEE TASK ORDER

ENVIRONMENTAL COMPLIANCE DUE DILIGENCE REPORT, POLPIS ROAD VACANT LAND, NANTUCKET, MA.

ENVIRONMENTAL SERVICES AT STENNIS SPACE CENTER TO INCLUDE NASA SHARED SERVICES CENTER (NSSC) AND NATIONAL CENTER FOR CRITICAL INFORMATION PROCESSING AND STORAGE (NCCIPS).

THE PURPOSE OF THIS MODIFICATION IS TO DEOBLIGATE REMAINING FUNDS FOR CONTRACT CLOSEOUT. 47PB0123F0075, MOD PA0004 HEREBY DECREASES THE TOTAL OBLIGATED AMOUNT FROM $127,732.37 BY $214.57 TO $127,517.80. THE PERIOD OF PERFORMANCE REMAINS UNCHANGED.

ENVIRONMENTAL RESPONSE TRAINING PROGRAM - LARGE BPA. LIMITED COMBINED ADMIN & OIL CALL ORDER P00003: OBLIGATE FUNDING

F115 - OFFICE OF GRANTS AND DEBARMENT'S MISSION SUPPORT

ENVIRONMENTAL RESPONSE TRAINING PROGRAM - LARGE BPA. LIMITED COMBINED ADMIN & OIL CALL ORDER P00002: OBLIGATE FUNDING

R425 - NUTRIENT SCIENTIFIC TECHNICAL EXCHANGE PARTNERSHIP AND SUPPORT (N-STEPS) P00006 - EXERCISE OPTION 2

R425 MINNESOTA SULFATE WATER QUALITY SAMPLING PROJECT P00002 - EXERCISE OPTION 2

BASE INTEGRATED ENVIRONMENTAL SUPPORT TASKS (BIEST)FOR TINKER AIR FORCE BASE, OKLAHOMA - EXERCISE OPTION 21

R425 - TOTAL MAXIMUM DAILY LOADS (TMDLS) SUPPORT FOR ALASKA, IDAHO, OREGON, AND WASHINGTON WATERS P00015 = INCREMENTAL FUNDING

W81EWF51770246

THE PURPOSE OF THE MODIFICATION IS TO EXERCISE PERIOD ONE BY EXTENDING THE TERMS OF THE CONTRACT FROM 9/29/2025 - 9/28/2026.

NYS LEAD AND COPPER SERVICE LINE INVENTORY

TECHNICAL SUPPORT SERVICES FOR NATIONAL ENVIRONMENTAL POLICY ACT (NEPA) COMPLIANCE ASSOCIATED WITH THE PIT PRODUCTION PROGRAM

THE PURPOSE OF THIS MODIFICATION IS TO ADD AN ADDITIONAL TASK TO THE SOW. THIS ADDITIONAL TASK WILL BE UNDER CLIN 00004 WITH A CEILING AND OBLIGATION $52,954.79.

THE PURPOSE OF THIS MODIFICATION IS TO EXERCISE OY3, ADD AN UPDATED SOO, INCREMENTALLY FUND OY3 CLINS.

SHARED EARLY WARNING SYSTEMS 3 (SEWS 3) ADD TIKTOCK CLAUSE 52.204-27

TRAINING ON RESILIENCE AND NATURAL DISASTER DEBRIS MANAGEMENT OFFICE OF LAND AND EMERGENCY MANAGEMENT (OLEM) MISSION SUPPORT SERVICES

SHARED EARLY WARNING SYSTEMS 3 (SEWS 3) ADD TIKTOCK CLAUSE 52.204-27

ENVIRONMENTAL RESPONSE TRAINING PROGRAM - LARGE BPA. LIMITED COMBINED ADMIN & OIL CALL ORDER APPROVE WORK PLAN AND COST ESTIMATE AND INCORPORATE IN NEW CALL ORDER

THE PURPOSE OF THIS MODIFICATION IS TO INCREASE WORK FOR THE NEPA DOCUMENTATION AND ANALYSIS AND ENVIRONMENTAL BASELINE SURVEY UPDATE FOR RE-ALIGNMENT AND CLOSURE (BRAC) ACTIONS AT SAVANNA ARMY DEPOT ACTIVITY (SVDA), IL, PROJECT.

SHARED EARLY WARNING SYSTEMS 3 (SEWS 3) ADD TIKTOCK CLAUSE 52.204-27

SHARED EARLY WARNING SYSTEMS 3 (SEWS 3) ADD TIKTOCK CLAUSE 52.204-27

ENVIRONMENTAL RESPONSE TRAINING PROGRAM - LARGE MOD P00003: DE-OBLIGATE UN-USED FUNDING IN THE AMOUNT OF $8,377.56.

ENVIRONMENTAL SERVICES CONTRACT II (ESC) II

BRIDGE INSPECTION

MODIFICATION TO EXERCISE OPTION YEAR FOR INVASIVE CARP REGIONAL COORDINATING COMMITTEE MISSION SUPPORT

TECHNICAL SUPPORT SERVICES FOR NATIONAL ENVIRONMENTAL POLICY ACT (NEPA) COMPLIANCE ASSOCIATED WITH THE LOS ALAMOS NATIONAL LABORATORY

BUILDER SUSTAINMENT MANAGEMENT SYSTEM (SMS) IMPLEMENTATION FOR INSTALLATION MANAGEMENT COMMAND (IMCOM) AT ID-R BATCH 2 + JACKSON

TINKER BIEST

MULTI ENVIRONMENTAL SERVICES FOR UNITED KINGDOM (UK)

3RD EXERCISE OPTION _ENERGY MANAGER_ KUNSAN REM AND OSAN REM

POST-CERTIFICATE COMPLIANCE INSPECTIONS

THE PURPOSE OF THIS MODIFICATION IS TO INCORPORATE NESHAP REGULATION INTO STATEMENT OF WORK AND TESTING THE OPERATIONAL PERFORMANCE OF EXISTING EXTRACTION WELLS AT THE NORTHEAST AREA. ALL CHANGES WILL REFLECT IAW REVISED APPENDIX A SOW.