Petroleum Underground Storage Tanks: Closure Assessment Sample Collection and Over-Excavation
This guidance document is advisory in nature but is binding on an agency until amended by such agency. A guidance document does not include internal procedural documents that only affect the internal operations of the agency and does not impose additional requirements or penalties on regulated parties or include confidential information or rules and regulations made in accordance with the Administrative Procedure Act. If you believe that this guidance document imposes additional requirements or penalties on regulated parties, you may request a review of the document.

Form #: 01-117 Guidance Documents Revised: 10/4/23


This guidance pertains to the sampling of media following the removal or replacement of underground storage tanks (USTs) and/or ancillary equipment (e.g., piping, dispensers) as well as management options for those soils contaminated by petroleum hydrocarbons (hereafter referred to as petroleum) that primarily resulted from UST system releases. Its purpose is to provide guidance concerning soil sample collection, laboratory analysis methods, over-excavation of contaminated soil, management of contaminated soil, and reporting.

This document integrates the regulations contained within Chapter 10 of the State Fire Marshal’s (SFM) Title 159 – Nebraska Administrative Code Rules and Regulations Underground Storage Tanks concerning closure requirements, the Nebraska Department of Environment and Energy’s (hereafter referred to as NDEE or Department) guidance for voluntary over-excavation below leaking USTs (LUSTs) and/or ancillary equipment, and actions considered eligible for reimbursement under NDEE’s Title 200 - Reasonable Rate Schedule and Reimbursement Guidance Manual as established under NDEE’s Title 200 - Rules and Regulations for Petroleum Release Remedial Action Reimbursement Fund). Any questions about or requests of variance to the SFM’s Title 159 rules and regulations can only be approved by the SFM.

Questions concerning over-excavation, sampling methodologies and NDEE’s Title 200 reimbursement should be directed to NDEE Petroleum Remediation (PR) Section (402) 471-2186 or

Other relevant NDEE regulations include:
Although this guidance makes reference to regulations and may include excerpts from regulations, it is not a regulation itself. Its purpose is to help the public understand the coordination and application of NDEE and SFM regulations and guidance concerning releases of petroleum from UST systems.

Produced by:
Nebraska Department of Environment and Energy
P.O. Box 98922
Lincoln, NE 68509-8922

phone (402) 471-2186

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