UNSPSC 71131100: Matrix stimulation services

Stimulation services using a process of injecting a fluid into the finer grained, interstitial particles that lie between larger particles or in which larger particles are embedded in sedimentary rocks such as sandstones and conglomerates.

UNSPSC 71131100 Matrix stimulation services is a Class code, but the recent state and local opportunities tagged to it show little alignment with the code's nominal scope. The opportunities instead span landfill gas collection infrastructure, park irrigation system installation, digester gas utilization project development, and municipal executive recruitment services—work that does not reflect matrix stimulation as typically understood in petroleum or geothermal reservoir enhancement contexts. The issuing bodies include special-purpose districts (Dalton-Whitfield Solid Waste Authority, Eastern Municipal Water District), municipalities (City of DeBary, City of College Park), and regional water authorities, suggesting the code may be misapplied across disparate infrastructure and services procurement.

The geographic spread includes Georgia (Dalton-Whitfield landfill gas system), Florida (DeBary park irrigation), California (EMWD digester gas utilization), and Georgia again (College Park executive search). Recent posted opportunities include the Dalton-Whitfield Solid Waste Authority's ITB for landfill gas collection and control system expansion at its Old Dixie Highway facility, due May 21, 2026, with a mandatory pre-proposal conference on May 1, 2026; the Eastern Municipal Water District's RFP for a long-term Design-Build-Finance-Own-Operate-Maintain digester gas utilization project across three regional water reclamation facilities, with proposal deadline April 13, 2026, and mandatory pre-proposal meeting March 9, 2026; and the City of DeBary's irrigation system improvement project at Rob Sullivan Park, though its bid due date (April 10, 2015) is historical and not current. The City of College Park issued an RFP for municipal executive search services on January 28, 2026, due February 18, 2026. Code activity under this classification appears sparse and mismatched to the code's technical definition, suggesting either systematic tagging error or that matrix stimulation is not a meaningful procurement driver in recent state and local solicitations reviewed.