Petroleum Remediation Guidance Document Updates

The Petroleum Remediation Program has revised the following guidance documents:

• 3-01 Excavation of petroleum-contaminated soil
• 3-02 General excavation report worksheet
• 3-02a Corrective action excavation report worksheet
• 4-01a Vapor intrusion assessments performed during site investigations
• 4-04 Soil sample collection and analysis procedures
• 4-05 Groundwater sample collection and analysis procedures
• 4-21 Investigation requirements for ethanol-blended fuel releases
• 2-05 Release information worksheet

See below for a detailed list of revisions and updates.

This guidance is effective on August 2, 2022. Previous formats of the General excavation report worksheet and Corrective action excavation report worksheet will not be accepted after September 30^th, 2022. If you are starting a new Excavation report, please use the new formats immediately.

For questions regarding guidance documents 4-04 Soil sample collection and analysis procedures and 4-05 Groundwater sample collection and analysis procedures, please contact Victor Henao, 651-757-2204 or victor.henao@state.mn.us. Questions on the remaining documents can be directed to Chris McLain, 651-757-2562 or chris.mclain@state.mn.us.

 

Additional guidance document reminders:

• For all sites that have been assigned an MPCA leak site ID where emergency conditions were overseen by the Emergency Response Program, PRP report forms should be utilized to ensure maximum reimbursement eligibility from the Petrofund. The use of the Spill response reporting form (c-er4-14) is discouraged, a form used by the Emergency Response Program for cleanup of spills.
• The most current version of the Investigation report (c-prp4-06) is dated 6/15/21 and the most current version of the Monitoring report (c-prp4-08) is dated 3/2/21. Always use the most current version from the web, and not local copies you may have saved in your file structures.

• 3-01 Excavation of petroleum-contaminated soil
• In Section I.A, clarified expectations for excavation of soils meeting criteria in Table 1
• Added field screening measurement criteria of 200 ppmv to define “Grossly contaminated” soils in Table 1
• Clarified Section I.B, “Situations requiring a limited site investigation,” to indicate LSI necessary when excavation of 200 cubic yards or less does not remove all soils with field screening criteria matching Table 1 or analytical results of 100 mg/kg or greater
• Clarified Section I.D to indicate petroleum-saturated and grossly contaminated soils cannot be returned to the excavation basin
• Clarified Section II.B to indicate that petroleum-contaminated soils from underground storage tanks meeting the criteria in Table 1 should be excavated to a maximum of 200 cubic yards regardless of whether the site has former leaksites on it or if contamination is newly discovered upon tank removal/replacement
• Streamlined section II.C to indicate the same excavation practices for underground storage tanks should be used during aboveground storage tank replacements and removals/decommissioning
• Updated the flowchart in Appendix A to reflect the aforementioned clarifications
• 3-02 General excavation report worksheet – This form should be used when contaminated soil is discovered while replacing, removing, or closing tanks in place.
• Entire form updated to current agency style-guide standards
• Clarification made to introductory paragraph indicating when to use General excavation report worksheet vs Corrective action excavation report worksheet
• Section 1: revised to ask about product released and release report timing/justification
• Section 2: revised to guide decision-making for a Limited site investigation and be explicit about not returning petroleum-saturated or grossly contaminated soils to the excavation basin
• Section 3: revised to guide decision-making for a post-excavation boring
• Section 4: revised to ask about soil stockpiling if not treated or disposed of immediately
• Section 6: Tables updated to match tables in c-prp4-06 and c-prp4-08
• Section 7: Figures updated to require the use of aerial imagery and provide 3 discrete figures
• Section 8: Appendices updated to require the “Release information worksheet” (c-prp2-05), and automatically include the form at the end of the excavation report
• 3-02a Corrective action excavation report worksheet – This form should be used when contaminated soil is excavated from a recent release or an MPCA approved corrective action without replacing, removing, or closing tanks in place.
• Entire form updated to current agency style-guide standards
• Clarification made to introductory paragraph indicating when to use c-prp3-02a vs c-prp3-02
• Anatomy of the report revised to align with c-prp3-02
• Section 1: Corrective action information
• Section 2: Excavation information
• Section 3: Sampling information
• Section 4: Soil treatment or disposal information
• Section 5: Conclusions and recommendation
• Section 6: Tables
• Section 7: Figures
• Section 8: Appendices
• Section 1: revised to ask about product released
• Section 4: revised to ask about soil stockpiling if not treated or disposed of immediately
• Section 6: Tables updated to match tables in c-prp4-06 and c-prp4-08
• Section 7: Figures updated to require the use of aerial imagery and provide 3 discrete figures
• 4-01a Vapor intrusion assessments performed during site investigations
• Analysis of soil gas samples for fixed gases on the Minnesota Soil Gas List via EPA Method 3C (methane, oxygen, and carbon dioxide) is a requirement
• Option added for use of a landfill gas meter and multi-gas meters for direct reading methane in the field
• 4-04 Soil sample collection and analysis procedures
• Criteria and additional direction added regarding the use of diesel-range organics silica gel cleanup method analysis
• 4-05 Groundwater sample collection and analysis procedures
• Clarification added on the preferred use of pumps for groundwater sample collection, and the discouragement of the use of bailers
• Revision no longer allowing the use of interial pump/tubing and check value method of groundwater sample collection, to align with EPA sampling guidance
• Criteria and additional direction added regarding the use of diesel-range organics silica gel cleanup method analysis
• 4-21 Investigation requirements for ethanol-blended fuel releases
• No change to fact sheet content. Format updated to current agency style-guide standards.
• 2-05 Release information worksheet
• No change to form content. Date updated in footer after being added as a default appendix to c-prp3-02