68HE0923F0074↗
Tetra Tech, Inc. received this contract from Region 9 Contracting Office, Environmental Protection Agency: $10.66M obligated so far for special studies/analysis- environmental assessments. It runs to 2027-09-30.
Key facts · data as of Oct 26, 2026
- Recipient
- Tetra Tech, Inc.
- Awarding agency
- Environmental Protection Agency
- Contracting office
- Region 9 Contracting Office (68HE09)
- Obligated to date
- $10.66M
- Potential value
- $10.66M
- Ends
- 2027-09-30
Source: USAspending.gov prime award records (obligations: money committed, not outlays), data as of Oct 26, 2026.
Cite this page: SpendQuery, Award 68HE0923F0074, data as of Oct 26, 2026, https://spendquery.com/award?id=CONT_AWD_68HE0923F0074_6800_68HE0923D0002_6800
Tetra Tech, Inc.: all federal awards · Environmental Protection Agency: spending · Region 9 Contracting Office: what it buys · The follow-on: recompete brief
THE CONTRACTOR SHALL PROVIDE THE SUPPORT NEEDED FOR TECHNICAL DESIGN SERVICES,& PLANNING AND CONDUCTING CLEANUP VERIFICATION OF TCRAS, PILOT STUDIES, OR OTHER INTERIM ACTIONS AT TRONOX AUMS UNDER THE RAES II CONTRACT #68HE0923D0002 FOR EPA FOR RE
Up for re-bid: ends 2027-09-30. Recompete brief →
What it is
- Product or service
- Special Studies/Analysis- Environmental Assessments (PSC B510)
- Industry
- Environmental Consulting Services (NAICS 541620)
- Contracting office
- Region 9 Contracting Office (68HE09)
- Competition
- Full and open competition
- Pricing
- Time and materials
- How it was bought
- Single-award IDIQ · under 68HE0923D0002
- Where the work is
- Apache, AZ · district AZ-02
Obligations by fiscal year
SpendQuery holds FY2023 on; earlier years are on USAspending.gov.
Subcontractors: where the money went next
19 subawards totaling $2.47M (23.2% of what was obligated), as Tetra Tech, Inc. reported them. Primes report subawards of $30,000 or more; smaller ones and unreported ones aren't here.
| Subcontractor | Amount | Subawards | Where | First | Last |
|---|---|---|---|---|---|
| Iina Ba Inc | $1.04M | 8 | NM | 2024-04-01 | 2025-07-24 |
| Authentic Drilling LLC | $644.0K | 2 | CO | 2023-10-17 | 2024-09-27 |
| Riley Engineering, LLC | $347.4K | 2 | AZ | 2024-06-24 | 2025-02-18 |
| Environmental Restoration Group, Inc | $130.8K | 1 | NM | 2025-02-19 | 2025-02-19 |
| Alpha Analytical, Inc. | $94.5K | 1 | MN | 2023-11-09 | 2023-11-09 |
| RJ Lee Group Inc | $72.2K | 1 | PA | 2023-11-02 | 2023-11-02 |
| Equipco Rentals | $45.4K | 1 | CA | 2026-04-15 | 2026-04-15 |
| Advanced Terra Testing, Inc | $34.3K | 1 | CO | 2024-02-23 | 2024-02-23 |
| Veteran Drilling | $32.4K | 1 | CA | 2024-09-24 | 2024-09-24 |
| Lithified Technologies US, LLC | $31.0K | 1 | NM | 2024-02-27 | 2024-02-27 |
The largest single subawards
| Date | To | Amount | For |
|---|---|---|---|
| 2024-09-27 | Authentic Drilling, LLC | $445.1K | DRILLING FOR VOIDS, GEOTECH, AND INVESTIGATION FOR TO 18 |
| 2024-09-04 | Iina Ba Inc | $296.4K | TEAM SUB - LABOR AND FIELD EQUIPMENT SUPPORT |
| 2025-02-18 | Riley Engineering, LLC | $268.0K | TEAM SUB LABOR SUPPORT |
| 2024-04-01 | Iina Ba Inc | $203.5K | TEAM SUB - LABOR AND FIELD EQUIPMENT SUPPORT |
| 2023-10-17 | Authentic Drilling, LLC | $198.9K | DRILLING IN COVE, AZ |
| 2024-07-12 | Iina Ba Inc | $132.7K | TEAM SUB - LABOR AND FIELD EQUIPMENT SUPPORT |
| 2025-02-19 | Environmental Restoration Group, Inc | $130.8K | TEAM SUB LABOR AND EQUIPMENT RENTAL SUPPORT FOR TO-018 |
| 2025-02-10 | Iina Ba Inc | $104.9K | TEAM SUB - LABOR AND FIELD EQUIPMENT SUPPORT |
| 2023-11-09 | Pace Analytical Services, LLC | $94.5K | LAB ANALYSIS TO-018 |
| 2024-08-07 | Iina Ba Inc | $87.4K | TEAM SUB - LABOR AND FIELD EQUIPMENT SUPPORT |
| 2025-07-24 | Iina Ba Inc | $82.2K | TEAM SUBCONTRACT SUPPORT FOR LABOR AND EQUIPMENT FOR TREE WEIR SITE WORK |
| 2024-10-31 | Iina Ba Inc | $80.2K | TEAM SUB - LABOR AND FIELD EQUIPMENT SUPPORT |
| 2024-06-24 | Riley Engineering, LLC | $79.4K | TEAM SUB - LABOR SUPPORT |
| 2023-11-02 | RJ Lee Group Inc | $72.2K | GEOTECHNICAL LABORATORY SERVICES |
| 2024-12-10 | Iina Ba Inc | $53.6K | TEAM SUB - LABOR AND FIELD EQUIPMENT SUPPORT |
| 2026-04-15 | Equipco Rentals | $45.4K | CONTINUE WEATHER STATION RENTAL TRANSFER SUPPORT TO RAES2 TO-018 |
| 2024-02-23 | Advanced Terra Testing, Inc | $34.3K | GEOTECHNICAL LABORATORY SERVICES |
| 2024-09-24 | Veteran Drilling | $32.4K | DRILLING SERVICES FOR USE ON BURIAL CELL 39 IN THE LUKACHUKAI MOUNTAINS MINING DISTRICT. |
| 2024-02-27 | Lithified Technologies US, LLC | $31.0K | SOLIDIFICATION MIX DESIGN |
Every action
10 actions since 2023-09-29. Each is a modification or amendment with the money it added or took back.
| Date | Modification | Kind | Amount | What the agency wrote |
|---|---|---|---|---|
| 2026-08-21 | P00009 | Supplemental agreement (work within scope) | $0 | THE PURPOSE OF THIS MODIFICATION (P00009) IS TO EXTEND THE TASK ORDER'S PERIOD OF PERFORMANCE UNDER THE NAVAJO NATION AUM RESPONSE ASSESSMENT AND EVALUATION SERVICES (RAES) II FOR EPA FOR REGIONS 6 & 9. |
| 2026-05-29 | P00008 | Supplemental agreement (work within scope) | $0 | THE PURPOSE OF THIS MODIFICATION IS TO INCORPORATE A REVISED STATEMENT OF WORK AND ADD AN ALTERNATE TASK ORDER COR (TOCOR). |
| 2025-12-17 | P00007 | Administrative change | $0 | THE PURPOSE OF THIS MODIFICATION IS TO ADD AN ADDITIONAL ALTERNATE TOCOR. |
| 2025-10-28 | P00006 | Administrative change | $0 | THE PURPOSE OF THIS MODIFICATION IS TO NOMINATE AN ALTERNATE COR/INVOICE APPROVER. |
| 2025-06-02 | P00005 | Supplemental agreement (work within scope) | $3.31M | THE PURPOSE OF THIS BILATERAL MOD IS TO ADD SCOPE AND FUNDING. THE CONTRACTOR SHALL PROVIDE THE SUPPORT NEEDED FOR INTERIM ACTIONS AT TRONOX AUMS UNDER THE RAES II CONTRACT #68HE0923D0002 FOR EPA FOR REGIONS 6 AND 9. MOD P00005. |
| 2024-11-26 | P00004 | Administrative change | $0 | THE PURPOSE OF THIS UNILATERAL ADMINISTRATIVE MODIFICATION IS TO CORRECT LINE ITEM POPS. THE CONTRACTOR SHALL PROVIDE THE SUPPORT NEEDED FOR INTERIM ACTIONS AT TRONOX AUMS UNDER THE RAES II CONTRACT #68HE0923D0002 FOR EPA FOR REGIONS 6 AND 9. MOD P00 |
| 2024-07-26 | P00003 | Supplemental agreement (work within scope) | $988.7K | THE PURPOSE OF THIS MODIFICATION IS TO INCORPORATE CHANGES PER THE REVISED SOW AND TETRA TECH WP/CE. THE CONTRACTOR SHALL PROVIDE THE SUPPORT NEEDED FOR INTERIM ACTIONS AT TRONOX AUMS UNDER THE RAES II CONTRACT #68HE0923D0002 FOR EPA FOR REGIONS 6 AN |
| 2024-05-29 | P00002 | Change order | $1.90M | THE PURPOSE OF THIS MODIFICATION IS TO INCORPORATE CHANGES PER THE REVISED SOW AND TETRA TECH WP/CE. THE CONTRACTOR SHALL PROVIDE THE SUPPORT NEEDED FOR INTERIM ACTIONS AT TRONOX AUMS UNDER THE RAES II CONTRACT #68HE0923D0002 FOR EPA FOR REGIONS 6 AN |
| 2023-11-17 | P00001 | Administrative change | $0 | THE PURPOSE OF THIS ADMIN MOD IS TO ADD A COR. THE CONTRACTOR SHALL PROVIDE THE SUPPORT NEEDED FOR INTERIM ACTIONS AT TRONOX AUMS UNDER THE RAES II CONTRACT #68HE0923D0002 FOR EPA FOR REGIONS 6 AND 9. |
| 2023-09-29 | 0 | $4.45M | THE CONTRACTOR SHALL PROVIDE THE SUPPORT NEEDED FOR TECHNICAL DESIGN SERVICES,& PLANNING AND CONDUCTING CLEANUP VERIFICATION OF TCRAS, PILOT STUDIES, OR OTHER INTERIM ACTIONS AT TRONOX AUMS UNDER THE RAES II CONTRACT #68HE0923D0002 FOR EPA FOR RE |
Source: USAspending.gov prime award transactions and FSRS subaward reports, as loaded by SpendQuery (data as of 2026-10-26). Amounts are obligations (money committed), not outlays. The official record on USAspending.gov ↗