Montana Petroleum Tank Releases and Closures Analysis
The provided content details data on Montana's petroleum tank releases, confirmations, closures, and cleanup efforts from 1987 to 2020. It includes information on confirmed and resolved releases, annual averages, legacy releases, EPA regulations, risk-based corrective action guidance, and screening levels. The visuals illustrate the cumulative releases over the years and highlight the progress in resolving petroleum tank issues in Montana.
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Montanas Petroleum Tank Releases Confirmations and Closures 1987 thru 2020 Consultants Day, February 23, 2021 Jay Shearer, Project Officer, DEQ-PTCS, Billings MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
Petroleum Tank Cleanup Section updated1/29/2021 MT DEQ Petroleum Tank Releases Closed (Resolved) Open (Not Resolved) interval end 1524 1621 Confirmed Calendar Year Interval interval total 3754 621 382 4757 annual average interval total 2230 524 1076 3830 annual average Legacy Releases 1988 EPA Regulations * * 1987-99 2000-08 2009-20 Totals: 313 69 32 186 58 90 1999 Risked-Based Corrective Action (RBCA) Guidance 927 927 2009 updated Risked-Based Screening Levels (RBSLs) * Includes 21 Releases Confirmed and one (1) Release Closed during years prior to 1987
Releases Confirmed & Closed per Year 600 500 Releases, Annual number Confirmed Closed (Resolved) 1988 EPA Regulations 1999 RBCA Guidance & RBSLs 400 2009 RBSLs update 300 200 100 Legacy Releases 0 Years MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
Cumulative Releases Confirmed, Closed, & Open 5000 4757 4500 Releases, cumulative 2009 RBSLs updated 4000 3830 1988 EPA Regulations 3500 3000 1999 RBCA Guidance & RBSLS Confirmed Closed (Resolved) Open (Not Resolved) 2500 2000 1500 1000 927 (865 PTCS) 500 0 Years MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
Petroleum Tank Cleanup Section updated1/29/2021 MT DEQ Petroleum Tank Releases Closed (Resolved) Open (Not Resolved) interval end 1524 1621 Confirmed Calendar Year Interval interval total 3754 621 382 4757 annual average interval total 2230 524 1076 3830 annual average Legacy Releases 1988 EPA Regulations * * 1987-99 2000-08 2009-20 Totals: 313 69 32 186 58 90 1999 Risked-Based Corrective Action (RBCA) Guidance 927 927 2009 updated Risked-Based Screening Levels (RBSLs) * Includes 21 Releases Confirmed and one (1) Release Closed during years prior to 1987
All Petroleum Releases Confirmed thru 2020 Legacy Releases 4000 (1988 EPA Regs.) Releases, number Confirmed Confirmed 3754 3500 3000 2500 2000 1500 1000 1999 RBCA Guidance & RBSLs 621 500 2009 RBSLs Updated 382 0 1987-1999 2000-2008 2009-2020 Year Intervals MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
Releases Closed (resolved) vs Open (not resolved) 4000 Legacy Releases (1988 EPA Regs.) Releases, number Confirmed Closed (Resolved) Open (not Resolved) 3754: 3110 3500 3000 2500 2000 1500 1000 1999 RBCA Guidance & RBSLs 621: 2009 RBSLs Updated 500 644 17% 476 382: 242 140 37% 145 23% 0 1987-1999 2000-2008 Year Intervals 2009-2020 MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
Annual Closures of Legacy Releases 350 300 Closures, number / year Closed Legacy Releases: Confirmed 1987 - 1999 1988 EPA Regulations 250 1999 RBCA Guidance & RBSLs 200 2009 RBSLs updated 150 100 Legacy Releases 50 Confirmed 0 Year MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
Annual Closures of Legacy Releases 160 140 Closures, number / year Closed Legacy Releases: Confirmed 1987 - 1999 1999 RBCA Guidance & RBSLs 120 100 2009 RBSLs updated 80 60 40 20 0 Year MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
Annual Closures of Releases Confirmed 1987 - 2020 160 Closed Releases: Confirmed 2000 - 2020 140 Closures, number / year Closed Legacy Releases: Confirmed 1987 - 1999 120 1999 RBCA Guidance & RBSLs 100 2009 RBSLs updated 80 60 40 20 0 Year MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
Annual Closures of Releases Confirmed 1987 - 2020 160 Closed Releases: Confirmed 2000 - 2020 140 Closures, number / year 2009 RBSLs updated Closed Legacy Releases: Confirmed 1987 - 1999 1999 RBCA Guidance & RBSLs 120 100 Total Closed Releases: Confirmed 1987 - 2020 80 60 40 20 0 Year MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
Annual Closures of All Releases 1987 - 2020 350 Closed (Resolved) Releases 300 2013 Special Legislative Funding $400,000 (14 Closures) Closures, number / year 250 2016 Orphan Share Funding $1,483,000 (59 Closures) 200 2020 - 2021 Legislative Funding $1,000,000 150 100 50 0 Year MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
Cumulative Releases Confirmed vs Not Resolved 5000 4757 4500 Releases, cumulative 4000 Confirmed 3500 Open (Not Resolved) 3000 2500 2000 1500 44% 1000 927 (865 PTCS) 500 0 Years MT DEQ Petroleum Tank Cleanup Section, 1/29/2021
