PSC Z2LC: Repair or Alteration of Tunnels and Subsurface Structures
Z2LC is the product and service code (PSC) federal agencies use for “Repair or Alteration of Tunnels and Subsurface Structures”, in the “Maint, Alter, Repair Nonbuildings” group. Here are the contracts open under it now, the NAICS codes it pairs with, and who buys and wins this work.
- Open contracts now
- 1
- Federal contract spending, FY2025
- $5.7 million
- Share of contract dollars to small businesses, since FY2024
- 83%
Open count as of Oct 28, 2026, 5:43 PM ET. The search counts live, so its total can differ by a notice or two.
Where Z2LC sits in the PSC Manual
- Category: Service
- Group Z: Maint, Repair, Alter Real Property
- Group Z2: Maint, Alter, Repair Nonbuildings
- Code Z2LC: Repair or Alteration of Tunnels and Subsurface Structures
NAICS codes used with PSC Z2LC
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with Z2LC most often:
| NAICS | Industry | Spent, last 3 years | Open with PSC Z2LC |
|---|---|---|---|
| 236220 | Commercial and Institutional Building Construction | $16.9 million | — |
| 237110 | Water and Sewer Line and Related Structures Construction | $4.7 million | — |
| 541330 | Engineering Services | $4.5 million | — |
| 237310 | Highway, Street, and Bridge Construction | $175,000 | — |
| 237990 | Other Heavy and Civil Engineering Construction | $52,250 | 1 |
| 238110 | Poured Concrete Foundation and Structure Contractors | $24,900 | — |
Open contracts under each code, with any PSC: NAICS 236220 · NAICS 237110 · NAICS 541330 · NAICS 237310 · NAICS 237990 · NAICS 238110
Who buys under PSC Z2LC
Agencies with the most contract dollars under Z2LC over the last three fiscal years, per USAspending.gov. Each name links to that agency's open contracts and buying history:
| Agency | Obligated |
|---|---|
| Department of the Navy | $13.5 million |
| Department of the Army | $4.7 million |
| U.S. Customs and Border Protection | $4.5 million |
| Bureau of Reclamation | $3.1 million |
| Department of Veterans Affairs | $400,816 |
| Forest Service | $97,741 |
| Department of Energy | $52,250 |
| National Park Service | $24,900 |
Federal spending under PSC Z2LC by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $6.5 million |
| FY2025 | $5.7 million |
| FY2026 (incomplete) | $14.2 million |
Headline figures use FY2025, the last complete year. FY2026 is still incomplete and will rise until about early January 2027 as Defense data arrives: USAspending.gov publishes Defense contracts 90 days after they're signed.
Who wins PSC Z2LC contracts
| Company | Obligated, last 3 years |
|---|---|
| Encon Desbuild JV 3 LLC | $9.6 million |
| A & H-Ambica JV LLC | $4.6 million |
| Crosstek Solutions LLC | $4.5 million |
| Tsontos, Michael M., S.A. | $4.4 million |
| Tepa EC, LLC | $3.1 million |
| Buckeye Industrial Piping LLC | $400,816 |
| GSI Pacific Inc. | $201,960 |
| Garden of Eden Lawn Care LLC | $175,000 |
| Lacy Mechanical Inc | $97,741 |
| RBV Contracting Inc | $66,740 |
Linked names have a FedReady profile, which shows the NAICS codes a business is registered as small under. Most large companies have none.
Large prime contractors (companies that hold the contract with the agency) subcontract part of their work to small businesses. See which primes subcontract, by NAICS code.
Research PSC Z2LC work
By the NAICS codes this work goes with, the one with the most spending first: who won recently, contracts ending soon, agencies' planned buys and the large primes that subcontract it, nationwide. Each code shows only the pages that exist for it:
- 236220 Commercial and Institutional Building Construction: who won recently · contracts ending in the next 12 months · planned buys · large primes that subcontract
- 237110 Water and Sewer Line and Related Structures Construction: who won recently · contracts ending in the next 12 months · planned buys · large primes that subcontract
- 541330 Engineering Services: who won recently · contracts ending in the next 12 months · planned buys · large primes that subcontract
Related PSC codes
- Z211 Maint – Rep – Alt/Dams
- Z212 Maint – Rep – Alt/Canals
- Z213 Maint – Rep – Alt/Mine Fire Cont
- Z214 Maint – Rep – Alt/Mine Subsidence Cont
- Z215 Maint – Rep – Alt/Surface Mine Reclam
- Z216 Maint – Rep – Alt/Dredging
- Z217 Dredging, Incl. Dustpan and Sea – Going Hoppers
- Z219 Maint – Rep – Alt/Other Consv Structure
- Z221 Maint – Rep – Alt/Airport Service Roads
- Z222 Maint – Rep – Alt/Hwys – RDS – STS – BRDGS – Ra
Frequently asked questions
What is PSC Z2LC?
Z2LC is the service code in the federal Product and Service Code (PSC) Manual named “Repair or Alteration of Tunnels and Subsurface Structures”, under Z (Maint, Repair, Alter Real Property) and Z2 (Maint, Alter, Repair Nonbuildings). Agencies put a PSC on every contract to record what they bought.
What is the difference between a PSC and a NAICS code?
A PSC describes what the government is buying. A NAICS code describes the industry of the business doing the work, and it sets the SBA size standard for small business set-asides. Every contract notice has both.
Which NAICS code goes with PSC Z2LC?
Most federal contract dollars under PSC Z2LC go with NAICS 236220 (Commercial and Institutional Building Construction), according to USAspending.gov. The contracting officer picks the NAICS code for each solicitation, so check the notice.
How do I find contracts that use PSC Z2LC?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. 1 open notice uses PSC Z2LC right now. FedReady can match new ones to your business and email you, free.
Keep going
Sources: SAM.gov Contract Opportunities, USAspending.gov and the PSC Manual. How we count.