Underground Storage Tank Product Piping Removal and Replacement Helena HQ

The Montana Department of Transportation is seeking a qualified contractor to remove and replace all product piping associated with two underground storage tanks at its Helena Headquarters, install new leak‑detection sensors and over‑fill alarms, and perform the necessary concrete and back‑fill work. The scope is delivered as a single lump‑sum price and must be completed no later than 13 Nov 2026. • Remove existing double‑wall flexible piping (~100–120 ft) for both gasoline and diesel tanks, including concrete demolition as needed. • Install new 1½‑inch APT‑approved piping, STP sump sensors (2), under‑dispenser sensors (4), and Veeder‑Root over‑fill alarms. • Provide all labor, materials, equipment, permitting (DEQ), testing, programming of the ATG system, and final documentation. • Work must occur within weekday hours (7 am‑9 pm) and may require weekend approval; no work on state holidays.