| | R7 START VI: LSASD SAFETY TRAINING | TETRA TECH, INC. | $80,000 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Apr 30, 2026 | Apr 30, 2026 | Jun 30, 2028 |
| | R7 START VI: REMOVAL SITE EVALUATION AT 10TH STREET SITE IN COLUMBUS, NEBRASKA | TETRA TECH, INC. | $38,711 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Apr 13, 2026 | Apr 13, 2026 | Sep 30, 2026 |
| | R7 START VI: PPE PREPAREDNESS SUPPORT LEVEL A TRAINING AND FACILITATION OF A HANDS-ON TRAINING EXERCISE | TETRA TECH, INC. | $49,818 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Mar 23, 2026 | Mar 23, 2026 | Mar 31, 2027 |
| | R7 START VI: IOWA ARMY AMMUNITION PLANT RESPONSE ACTIVITY TECHNICAL SUPPORT | TETRA TECH, INC. | $89,997 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Mar 20, 2026 | Mar 20, 2026 | Jun 1, 2026 |
| | R7 START VI: WORLD CUP 2026 SUPPORT | TETRA TECH, INC. | $302,373 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Mar 2, 2026 | Mar 2, 2026 | Sep 30, 2026 |
| | R7 START VI: OPA - ATLAS OIL SPILL | TETRA TECH, INC. | $60,141 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Feb 19, 2026 | Feb 19, 2026 | Jun 30, 2026 |
| | R7 START VI: SOIL AND GROUNDWATER SAMPLING FOR WEST BURLINGTON VOC | TETRA TECH, INC. | $23,088 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Feb 10, 2026 | Feb 10, 2026 | Aug 31, 2026 |
| | R7 START VI: REGION 9 LOS ANGELES WILDFIRE FEMA MISSION EATON PB SAMPLING | TETRA TECH, INC. | $60,641 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Jan 8, 2026 | Jan 8, 2026 | Jun 30, 2026 |
| | R7 START VI: NEWTON COUNTY MINE TAILINGS ALTERNATE WATER | TETRA TECH, INC. | $34,229 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Jan 5, 2026 | Jan 5, 2026 | Aug 31, 2027 |
| | R7 START VI: FORMER UNITED ZINC AND ASSOCIATED SMELTERS DATA SUPPORT, FIELD SAMPLING, AND TECHNICAL SUPPORT FOR REMEDIAL ACTIVITIES. | TETRA TECH, INC. | $300,799 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Oct 30, 2025 | Oct 30, 2025 | Oct 29, 2026 |
| | R7 START VI: PRELIMINARY ASSESSMENTS OF FORMER MARTINIZING DRY CLEANING PLANT | TETRA TECH, INC. | $63,137 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Oct 15, 2025 | Oct 15, 2025 | Sep 30, 2026 |
| | R7 START VI: REMOVAL SUPPORT FOR MERCURY-EARNSHAW STREET | TETRA TECH, INC. | $34,393 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Sep 30, 2025 | Sep 30, 2025 | Sep 25, 2026 |
| | R7 START VI: CONTRACT MANAGEMENT TO OVERALL START VI CONTRACT | TETRA TECH, INC. | $845,336 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Sep 29, 2025 | Jul 1, 2025 | Jun 30, 2028 |
| | AE SERVICES FOR REMEDIAL INVESTIGATION (RI) AND FEASIBILITY STUDY (FS) AT THE HISTORIC POTTERIES SUPERFUND SITE (SITE) OPERABLE UNIT 2 (OU2) | TETRA TECH, INC. | $1,903,379 | DEPT OF THE ARMY | ENVIRONMENTAL PROTECTION AGENCY | — | 541330Engineering Services | C219ARCHITECT AND ENGINEERING- GENERAL: OTHER | Sep 23, 2025 | Sep 23, 2025 | Sep 22, 2030 |
| | R7 START VI: EXPANDED SITE INVESTIGATION RUTH NORGE LANDERAMA | TETRA TECH, INC. | $59,732 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Sep 23, 2025 | Sep 23, 2025 | Sep 30, 2026 |
| | R7 START VI: HRS SUPPORT GENERAL MOTORS SIOUX CITY | TETRA TECH, INC. | $18,674 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Sep 18, 2025 | Sep 18, 2025 | Jun 30, 2026 |
| | R7 START VI: COMMUNITY ENGAGEMENT SUPPORT | TETRA TECH, INC. | $20,459 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Sep 15, 2025 | Sep 15, 2025 | Mar 6, 2027 |
| | R7 START VI:RA TECHNICAL SUPPORT, WASHINGTON COUNTY LEAD DISTRICTS - FURNACE CREEK & OLD MINES (OPTION) POTOSI | TETRA TECH, INC. | $861,623 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Sep 15, 2025 | Sep 15, 2025 | Jun 30, 2026 |
| | R7 START VI: PLANNING AND PREPAREDNESS/REGIONAL RESPONSE TEAM ACTIVITIES | TETRA TECH, INC. | $642,939 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Sep 5, 2025 | Sep 5, 2025 | Jun 30, 2028 |
| | R7 START VI: VIBURNUM TREND LEAD HAUL ROADS | TETRA TECH, INC. | $16,734 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Aug 26, 2025 | Aug 26, 2025 | Aug 25, 2026 |
| | R7 START VI: SUPPORT & MANAGEMENT NEBRASKA SUBAREA SUPPORT | TETRA TECH, INC. | $49,844 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Aug 25, 2025 | Aug 25, 2025 | Jun 30, 2028 |
| | R7 START VI: REMEDIATION ACTION BIG RIVER MINE TAILINGS | TETRA TECH, INC. | $515,919 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Aug 25, 2025 | Aug 25, 2025 | Aug 25, 2026 |
| | R7 START VI: SAMPLING AND ANALYSIS SUPPORT CHEROKEE COUNTY | TETRA TECH, INC. | $1,799,098 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Aug 25, 2025 | Aug 25, 2025 | Jun 30, 2028 |
| | R7 START VI: SUPPORT & MANAGEMENT GREATER ST. LOUIS SUBAREA SUPPORT | TETRA TECH, INC. | $63,000 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Aug 25, 2025 | Aug 25, 2025 | Jun 30, 2028 |
| | R7 START VI: RESIDENTIAL SAMPLING, ANALYSIS, AND DATABASE UPDATE FOR SOUTHWEST JEFFERSON COUNTY MINING | TETRA TECH, INC. | $1,018,925 | ENVIRONMENTAL PROTECTION AGENCY | ENVIRONMENTAL PROTECTION AGENCY | — | 541620Environmental Consulting Services | R429SUPPORT- PROFESSIONAL: EMERGENCY RESPONSE/DISASTER PLANNING/PREPAREDNESS SUPPORT | Aug 22, 2025 | Aug 22, 2025 | Jun 30, 2026 |