68HE0923F0051↗
Tetra Tech, Inc. received this contract from Region 9 Contracting Office, Environmental Protection Agency: $20.27M obligated so far for special studies/analysis- environmental assessments. It runs to 2027-11-30.
Key facts · data as of Oct 25, 2026
- Recipient
- Tetra Tech, Inc.
- Awarding agency
- Environmental Protection Agency
- Contracting office
- Region 9 Contracting Office (68HE09)
- Obligated to date
- $20.27M
- Potential value
- $20.27M
- Ends
- 2027-11-30
Source: USAspending.gov prime award records (obligations: money committed, not outlays), data as of Oct 25, 2026.
Cite this page: SpendQuery, Award 68HE0923F0051, data as of Oct 25, 2026, https://spendquery.com/award?id=CONT_AWD_68HE0923F0051_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 PERFORM REQUIRED TO CONDUCT THE ENGINEERING EVALUATION/COST ANALYSIS (EE/CA) AND RELATED TASKS AT THE FOLLOWING TRONOX ABANDONED URANIUM MINES LOCATED IN NAVAJO NATION'S NORTHERN AGENCY. THIS IS A TASK ORDER UNDER RAES 2 CON
Up for re-bid: ends 2027-11-30. 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
23 subawards totaling $3.81M (18.8% 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 |
|---|---|---|---|---|---|
| Dinetahdoo Cultural Resources LLC | $981.2K | 1 | NM | 2025-04-22 | 2025-04-22 |
| Environmental Restoration Group, Inc | $760.5K | 2 | NM | 2023-09-21 | 2024-02-21 |
| Sundance Consultants, LLC | $689.4K | 3 | ID | 2024-03-27 | 2026-02-26 |
| Environmental Data Services, Limited | $364.9K | 4 | PA | 2024-08-06 | 2025-08-26 |
| Gel Laboratories LLC | $195.9K | 2 | SC | 2024-08-07 | 2025-07-10 |
| Equipco Rentals | $166.0K | 1 | CA | 2026-04-15 | 2026-04-15 |
| Iina Ba Inc | $138.9K | 1 | NM | 2024-04-08 | 2024-04-08 |
| Bric LLC | $128.0K | 1 | AZ | 2023-10-20 | 2023-10-20 |
| The Gel Group, Inc | $106.5K | 1 | SC | 2023-09-12 | 2023-09-12 |
| Allterra Central | $105.2K | 3 | TX | 2024-03-27 | 2025-02-25 |
| Validata Chemical Services, Inc. | $51.6K | 1 | GA | 2023-09-12 | 2023-09-12 |
| Eco-Rental Solutions LLC | $49.1K | 1 | NY | 2024-05-02 | 2024-05-02 |
| Riley Engineering, LLC | $39.0K | 1 | AZ | 2025-01-06 | 2025-01-06 |
| Thermo Fisher Scientific Inc. | $38.8K | 1 | MA | 2023-08-29 | 2023-08-29 |
The largest single subawards
| Date | To | Amount | For |
|---|---|---|---|
| 2025-04-22 | Dinetahdoo Cultural Resources LLC | $981.2K | CULTURAL RESOURCE MONITORING AND SURVEYS, MODIFIED TO ADD SERVICES AND FUNDING |
| 2023-09-21 | Environmental Restoration Group, Inc | $635.2K | TEAM SUB LABOR AND CLIN EQUIPMENT RENTAL SUPPORTING TO-007 |
| 2024-04-05 | Sundance Consultants, LLC | $308.1K | MONITORING AND CULTURAL RESOURCES SURVEYS |
| 2024-03-27 | Sundance Consultants, LLC | $300.5K | MONITORING AND CULTURAL RESOURCES SURVEYS |
| 2026-04-15 | Equipco Rentals | $166.0K | CONTINUATION OF WEATHER STATIONS RENTAL - 24 MONTH TERM |
| 2025-08-26 | Environmental Data Services, Limited | $160.9K | LAB VALIDATION SERVICES |
| 2024-08-07 | Gel Laboratories LLC | $144.6K | LABORATORY ANALYTICAL SERVICES |
| 2024-04-08 | Iina Ba Inc | $138.9K | TEAM SUB LABOR AND FIELD EQUIPMENT RENTAL |
| 2023-10-20 | Bric LLC | $128.0K | CULTURAL SURVEYING/MONITORING SERVICES FOR TO-007 |
| 2024-02-21 | Environmental Restoration Group, Inc | $125.3K | TEAM SUB LABOR AND EQUIPMENT RENTAL SUPPORT |
| 2023-09-12 | The Gel Group, Inc | $106.5K | LABORATORY ANALYTICAL SERVICES |
| 2025-07-29 | Environmental Data Services, Limited | $81.1K | DATA VALIDATION SERVICES |
| 2026-02-26 | Sundance Consultants, LLC | $80.7K | PROJECT: CULTURAL SERVICES AWARD FOR RAES2 TASK ORDER: BRODIE 1 MINE AND BLOCK K MINE LEASE. |
| 2024-08-06 | Environmental Data Services, Limited | $77.9K | DATA VALIDATION SERVICES |
| 2023-09-12 | Validata Chemical Services, Inc. | $51.6K | DATA VALIDATION SERVICES |
| 2025-07-10 | Gel Laboratories LLC | $51.3K | LABORATORY ANALYTICAL SERVICES |
| 2024-05-02 | Eco-Rental Solutions LLC | $49.1K | FIELD EQUIPMENT RENTAL |
| 2025-01-03 | Environmental Data Services, Limited | $45.0K | DATA VALIDATION SERVICES |
| 2025-01-06 | Riley Engineering, LLC | $39.0K | TEAM SUB LABOR SUPPORT |
| 2023-08-29 | Thermo Scientific Portable Analytical Instruments Inc. | $38.8K | EQUIPMENT RENTAL - XRF UNITS |
| 2024-03-27 | Allterra Central Inc | $35.2K | FIELD EQUIPMENT RENTAL - LONG TERM |
| 2024-03-27 | Allterra Central Inc | $35.2K | FIELD EQUIPMENT RENTAL - LONG TERM |
| 2025-02-25 | Allterra Central Inc | $34.8K | EQUIPMENT RENTAL |
Every action
8 actions since 2023-07-20. 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 | P00007 | Supplemental agreement (work within scope) | $4.99M | THE PURPOSE OF THIS BILATERAL MODIFICATION (P00007) IS TO INCREASE AND FUND LOE INCREASE AND POP EXTENSION FOR N. AGENCY EE/CA - TO #0007 (DO #68HE0923F0051) ON RAES2 CONTRACT #68HE0923D0002. |
| 2026-05-22 | P00006 | Supplemental agreement (work within scope) | $999.2K | THE PURPOSE OF THIS BILATERAL MODIFICATION IS TO INCREASE THE LOE FOR N. AGENCY EE/CA - TO #0007 (DO #68HE0923F0051) ON RAES2 CONTRACT #68HE0923D0002. |
| 2026-01-02 | P00005 | Administrative change | $0 | THE PURPOSE OF THIS NO-COST, UNILATERAL MODIFICATION IS TO CORRECT CLIN 0001 POP END DATE FOR N. AGENCY EE/CA - TO #0007 (DO #68HE0923F0051) ON RAES2 CONTRACT #68HE0923D0002. THIS EXTENDS THE PERIOD OF PERFORMANCE TO NOVEMBER 19, 2026. |
| 2025-10-15 | P00004 | Supplemental agreement (work within scope) | $0 | THE PURPOSE OF THIS BILATERAL MOD IS FOR A NO-COST TIME EXTENSION FOR N. AGENCY EE/CA - TO #0007 (DO #68HE0923F0051) ON RAES2 CONTRACT #68HE0923D0002. THIS EXTENDS THE PERIOD OF PERFORMANCE TO NOVEMBER 19, 2026. |
| 2025-04-02 | P00003 | Supplemental agreement (work within scope) | $4.96M | THE PURPOSE OF THIS BILATERAL MOD IS TO ADD SCOPE AND FUNDING TO CONDUCT EE/CAS IN NAVAJO NATION'S NORTHERN AGENCY. THIS IS A MOD 3 FOR TO 07 UNDER RAES 2 CONTRACT #68HE0923D0002. |
| 2024-08-02 | P00002 | Administrative change | $0 | THE PURPOSE OF THIS UNILATERAL MOD IS TO CHANGE ALTERNATE TOCORS FOR THIS TO TO CONDUCT EE/CAS IN NAVAJO NATION'S NORTHERN AGENCY. THIS IS A MOD P00002 FOR TO 07 UNDER RAES 2 CONTRACT #68HE0923D0002. |
| 2024-06-20 | P00001 | Supplemental agreement (work within scope) | $4.45M | THE CONTRACTOR SHALL PERFORM REQUIRED TO CONDUCT EE/CAS IN NAVAJO NATION'S NORTHERN AGENCY. THIS IS A MOD P00001 FOR TO 07 UNDER RAES 2 CONTRACT #68HE0923D0002. |
| 2023-07-20 | 0 | $4.87M | THE CONTRACTOR SHALL PERFORM REQUIRED TO CONDUCT THE ENGINEERING EVALUATION/COST ANALYSIS (EE/CA) AND RELATED TASKS AT THE FOLLOWING TRONOX ABANDONED URANIUM MINES LOCATED IN NAVAJO NATION'S NORTHERN AGENCY. THIS IS A TASK ORDER UNDER RAES 2 CON |
Source: USAspending.gov prime award transactions and FSRS subaward reports, as loaded by SpendQuery (data as of 2026-10-25). Amounts are obligations (money committed), not outlays. The official record on USAspending.gov ↗