Letterle & Associates, Inc.

Environmental ServicesPennsylvania, United States11-50 Employees

Letterle & Associates, Inc. is a veteran-owned environmental consulting and remediation firm based in Allison Park, Pennsylvania, with additional offices in Franklin and Bellefonte. It specializes in investigating and remediating petroleum releases at storage-tank sites, guiding cleanup decisions. The company operates as a Pennsylvania LLC that is registered to do business in West Virginia and holds a West Virginia contractor's license.

Letterle serves clients in Pennsylvania, West Virginia, and Maryland and has a growing focus on regulatory compliance, including NPDES permitting, spill plans, and waste reporting. Its caseload includes more than 100 storage-tank release sites, with the majority funded by the Pennsylvania Underground Storage Tank Indemnification Fund or private insurance. The firm emphasizes remediation approaches that balance effectiveness with cost considerations to support redevelopment of devalued properties.

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