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Procurement references

Industries (NAICS)

Product & service codes

Federal Acquisition Regulation

Small business size standards

Your research

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Product & service codes

Product & service codes

Construction of Tunnels and Subsurface Structures

PSC Y1LC

Official source

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Source date: Apr 8, 2025

Record identifier

Y1LC

Independent research for federal contractors.
Not affiliated with the U.S. government.

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