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Closure Assessment Guidelines for Underground Storage Tanks in Indian Country

Region 4 is the implementing agency for USTs in Indian Country. This document contains the closure guidelines in Indian Country under the UST program authority. Distributed to UST owners/operators in Indian Country.

Closure Assessment Guidelines for Underground Storage Tanks in Indian Country (pdf) (1.22 MB, August 2018)

Closure Assessment Guidelines for Underground Storage Tanks in Indian Country

Underground Storage Tanks (USTs)