68HE0923F0068↗
Tetra Tech, Inc. received this contract from Region 9 Contracting Office, Environmental Protection Agency: $266.1K obligated so far for special studies/analysis- environmental assessments. It runs to 2027-08-10.
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
- $266.1K
- Potential value
- $266.1K
- Ends
- 2027-08-10
Source: USAspending.gov prime award records (obligations: money committed, not outlays), data as of Oct 26, 2026.
Cite this page: SpendQuery, Award 68HE0923F0068, data as of Oct 26, 2026, https://spendquery.com/award?id=CONT_AWD_68HE0923F0068_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 TECHNICAL ASSISTANCE FOR OVERSIGHT OF THE POTENTIALLY RESPONSIBLE PARTY (PRP) WESTERN NUCLEAR. AS THEY PERFORM ENGINEERING EVALUATIONS/COST ANALYSES (EE/CAS) AND REMOVAL ACTIONS (RAS) IN THE MARIANO LAKE AREA OF THE EASTE
Up for re-bid: ends 2027-08-10. 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
- Pima, AZ · district AZ-06
Obligations by fiscal year
SpendQuery holds FY2023 on; earlier years are on USAspending.gov.
Subcontractors: where the money went next
No subawards reported for this award. Primes report subawards of $30,000 or more; many awards have none.
Every action
7 actions since 2023-08-11. Each is a modification or amendment with the money it added or took back.
| Date | Modification | Kind | Amount | What the agency wrote |
|---|---|---|---|---|
| 2026-07-31 | P00007 | Change order | $0 | THE PURPOSE OF THIS NO-COST, BILATERAL MODIFICATION IS TO EXTEND THE POP END DATE BY TWELVE (12) MONTHS FOR RUBY MINES - NAVAJO NATION AUM RESPONSE ASSESSMENT AND EVALUATION SERVICES (RAES) II FOR EPA FOR REGIONS 6 & 9.. |
| 2025-09-19 | P00006 | Supplemental agreement (work within scope) | $232.5K | THE PURPOSE OF THIS BILATERAL MODIFICATION IS TO INCORPORATE A REVISED SOW TO REFLECT ADJUSTMENTS REGARDING TECHNICAL SUPPORT FOR REMOVAL ACTIONS FOR ENGINEERING REVIEWS FOR THE 60% AND 95% CONSTRUCTION DESIGN DOCUMENTS AND RE-OBLIGATE FUNDING. |
| 2025-08-06 | P00005 | Supplemental agreement (work within scope) | -$232.5K | THE PURPOSE OF THIS BILATERAL MODIFICATION IS TO DEOBLIGATE FUNDS FROM SSID09ZDE AND EXTEND THE PERIOD OF PERFORMANCE (POP). |
| 2025-06-03 | P00003 | Administrative change | $0 | THE PURPOSE OF THIS UNILATERAL MOD IS TO REMOVE AN ALTERNATE TOCOR. CONTRACTOR PROVIDES ASSISTANCE FOR OVERSIGHT OF THE PRP - WESTERN NUCLEAR AS THEY PERFORM EE/CAS AND RAS IN THE MARIANO LAKE AREA OF THE EASTERN AGENCY NAVAJO NATION. |
| 2025-01-31 | P00002 | Administrative change | $0 | THE PURPOSE OF THIS UNILATERAL MOD IS TO ADD AN ALTERNATE TOCOR AND CHANGE THE SUPERFUND SITE IDENTIFIER (SSID). CONTRACTOR PROVIDES ASSISTANCE FOR OVERSIGHT OF THE PRP - WESTERN NUCLEAR AS THEY PERFORM EE/CAS AND RAS IN THE MARIANO LAKE AREA OF THE |
| 2024-10-17 | P00001 | Administrative change | $0 | THE PURPOSE OF THIS UNILATERAL MOD IS TO CHANGE THE PRIMARY TOCOR. CONTRACTOR PROVIDES ASSISTANCE FOR OVERSIGHT OF THE PRP - WESTERN NUCLEAR AS THEY PERFORM EE/CAS AND RAS IN THE MARIANO LAKE AREA OF THE EASTERN AGENCY NAVAJO NATION. |
| 2023-08-11 | 0 | $266.1K | THE CONTRACTOR SHALL PROVIDE TECHNICAL ASSISTANCE FOR OVERSIGHT OF THE POTENTIALLY RESPONSIBLE PARTY (PRP) WESTERN NUCLEAR. AS THEY PERFORM ENGINEERING EVALUATIONS/COST ANALYSES (EE/CAS) AND REMOVAL ACTIONS (RAS) IN THE MARIANO LAKE AREA OF THE EASTE |
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 ↗