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North Pole Refinery Maps

Updated: July 16, 2018

Notes
  • A dashed or solid line generally outlines the approximate extent of the plume.
  • On any given map, the most recent results are shown, however not all wells are/were sampled each quarter. Units are in µg/L or micrograms per liter; one µg/L = one part per billion or ppb.
  • Maps are from the 3rd quarter unless otherwise indicated. The 3rd quarter sample event is generally the most comprehensive.

Most Recent Maps Offsite (the plume area)

2018 North Pole Water Water System Expansion Project (PDF 1.3M) February 2018, showing the plume area based on monitoring in 2017 and the current construction zones for water service expansion.

thumbnail map of study area - sulfolane contamination

2017: Annual 2017 Approximate Extent of Sulfolane Impacts (PDF 788K)

From Flint Hills’ Annual 2017 Offsite Groundwater Monitoring Report. (Figure 3-5)

thumbnail map of study area - sulfolane contamination

2017: Annual 2017 Private Well Sulfolane Results (PDF 788K)

From Flint Hills’ Annual 2017 Offsite Groundwater Monitoring Report. (Figure A-2)

thumbnail map of Proposed North Pole distribution system area - sulfolane contamination

2016 Potable Water Solutions Provided by Flint Hills Resources (PDF 822K)

From Flint Hills' Alternative Water Solutions Program 2016 Annual Report.

thumbnail map of study area - sulfolane contamination

2016 3rd Quarter: Approximate Extent of Sulfolane Impacts in Offsite Monitoring Wells and Private Wells (PDF 788K)

From Flint Hills’ 2nd Semiannual 2016 Offsite Groundwater Monitoring Report. (Figure 3-5)

thumbnail map of study area - sulfolane contamination

2016 3rd Quarter: Offsite Sulfolane Trends, Monitoring Wells and Private Wells (PDF 741K)

From Flint Hills’ 2nd Semiannual 2016 Offsite Groundwater Monitoring Report.(Figure 1-A)

Most Recent Maps onsite - former refinery property

thumbnail map of Proposed North Pole distribution system area - sulfolane contamination

2017 1st Quarter Sulfolane Concentrations on the Former Refinery Property (PDF 572K)

From Flint Hills' First Semiannual 2017 Onsite Groundwater Monitoring Report. (Figure 3-9)

thumbnail map of study area - sulfolane contamination

2017 1st Quarter Benzene Concentrations on the Former Refinery Property (PDF 601K)

From Flint Hills' First Semiannual 2017 Onsite Groundwater Monitoring Report. (Figure 3-8)

thumbnail map of Proposed North Pole distribution system area - sulfolane contamination

2016 3rd Quarter Sulfolane Concentrations on the Former Refinery Property (PDF 1.2M)

From Flint Hills' Second Semiannual 2016 Onsite Groundwater Monitoring Report. (Figure 3-10)

thumbnail map of study area - sulfolane contamination

2016 3rd Quarter Benzene Concentrations on the Former Refinery Property (PDF 678K)

From Flint Hills' Second Semiannual 2016 Onsite Groundwater Monitoring Report. (Figure 3-9)

Earlier Maps

Maps Primarily Showing Conditions off the Refinery Property (plume area)

Year Map Desc/Download Resource File type/size
2015 Approximate extent of sulfolane impacts in offsite monitoring wells and private wells, 3rd Quarter Second Semiannual 2015 Offsite Groundwater Monitoring Report (Figure 4-9) PDF 821K
2015 Private well sulfolane results, 3rd Quarter Second Semiannual 2015 Offsite Groundwater Monitoring Report (Figure 3-1) PDF 676K
2015 Offsite sulfolane trends, monitoring wells and private wells,3rd Quarter Second Semiannual 2015 Offsite Groundwater Monitoring Report (Figure 1-A) PDF 741K
2014 Private well search areas and sulfolane results -Sulfolane concentrations in private wells Third Quarter 2014 Monitoring Report (Figure 3-1) PDF 705K
2013 Trends in sulfolane concentrations (increasing, decreasing, or stable) in private wells and monitoring wells Third Quarter 2013 Groundwater Monitoring Report PDF 764K
2013 Private Well Search Areas and Sulfolane Results -Sulfolane concentrations in private wells Third Quarter 2013 Groundwater Monitoring Report (Figure 3-1) PDF 715K
2013 Sulfolane concentrations - 10-55 feet below water table Third Quarter 2013 Groundwater Monitoring Report (Figure 4-11) PDF 715K
2012 Sulfolane concentrations at the water table Fourth Quarter 2012 Monitoring Report (Figure 4-13) PDF 630K
2011 Sulfolane concentrations in groundwater for select monitoring wells - 10-55 feet below the water table, 4th Quarter Map created by DEC as an Open House display PDF 1.4M
2011 Sulfolane concentrations in groundwater for select monitoring wells - at the Water Table, 4th Quarter Map created by DEC as an Open House display PDF 1.4M
2011 Sulfolane Concentrations in Off-Refinery Monitoring Wells (November 2010 through January 2011), First Quarter Map created by DEC PDF 2.5M
2010 Area of concern with monitoring data - April 14, 2010 Map created by DEC PDF 1.8M
2009 December Sample Results - Delineation wells. Samples were analyzed by two different laboratories, SGS and Pace Shannon & Wilson, Fig. 1-A PDF 170K
2009 Monitoring wells from the Ford subdivision - Nov. 24, 2009. Additional Monitoring wells, proposed for DEC approval, are marked in yellow. Flint Hills Resources PDF 568K

Maps Primarily Showing Conditions on the Former Refinery Property

Year Map Desc/Download Resource File type/size
2015 Sulfolane Concentrations on the former Refinery Property, 3rd Quarter Flint Hills' Second Semiannual 2015 Onsite Groundwater Monitoring Report (figure 4-14) PDF 706K
2015 Benzene Concentrations on the former Refinery Property, 3rd Quarter Flint Hills' Second Semiannual 2015 Onsite Groundwater Monitoring Report (figure 4-13) PDF 797K
2012 Benzene concentrations in groundwater monitoring wells on the refinery property 4th Quarter 2012 Groundwater Monitoring Report (Figure 4-9) PDF 530K
2011 Sulfolane Concentrations in On-Refinery Monitoring Wells (November 2010 through January 2011) Map created by DEC PDF 4.7M

More Information

More analytical maps and data are available at the DEC office in Fairbanks:

  • DEC Contaminated Sites Program
  • 610 University Ave.
  • Fairbanks, AK  99709-3643
  • Main phone: 907-451-2143
  • Fax: 907-451-5105

Division Address

  • Department of Environmental Conservation
  • Division of Spill Prevention and Response
  • 410 Willoughby Ave., Ste. 302
  • PO Box 111800
  • Juneau, AK 99811-1800