| Action Date |
Action |
Description |
DEC Staff |
| 12/1/1995 |
Site Added to Database |
Site added to database. |
Bob Krogseng |
| 5/14/1996 |
Site Ranked Using the AHRM |
Site reranked to reflect some of Shannon and Wilson's ranking values. |
S&W |
| 8/8/1996 |
Site Ranked Using the AHRM |
Site reranked. |
Bob Krogseng |
| 9/19/1996 |
Site Ranked Using the AHRM |
Shannon and Wilson's ranking reviewed and site score updated. |
Bob Krogseng |
| 3/11/1998 |
Cleanup Plan Approved |
(Old R:Base Action Code = RAPA - Remedial Action Plan Approval). Staff approved Marathon's remediation plan to treat soils contaminated by an old gas condensate leak, by thermal remediation using the "HAVE" type process. Soils placed back into the excavation which reached to the normal water table will be required to be treated to level A. |
Bob Krogseng |
| 8/26/1998 |
Cleanup Plan Approved |
Reviewed and approved a Remedial Action Plan for removal of Natural Gas Condensate from soil and GW around Pad 14-6. The entire plan will be implemented in spring 1999. A plan for a test project will be submitted for installation before freezeup 1998. |
Donald Seagren |
| 12/14/1998 |
Cleanup Plan Approved |
Reviewed a draft High Vacuum Extraction System Long-Term Pilot Test work plan. Coordinated review with AOGC and AQ program. Pilot test work plan approved. |
Donald Seagren |
| 5/19/1999 |
Site Characterization Workplan Approved |
Approved work plan for installation of additional monitoring well. MW to be installed 2-3 June 99. |
Donald Seagren |
| 8/25/1999 |
Meeting or Teleconference Held |
Site inspection with Bob Menzie to observe spill cleanup and HVAS system. |
Donald Seagren |
| 10/25/1999 |
Update or Other Action |
Reviewed Second Quarter 1999 Remediation system Pilot Test Report. |
Donald Seagren |
| 11/16/1999 |
Update or Other Action |
Reviewed semi-annual ground water monitoring report. |
Donald Seagren |
| 10/23/2000 |
Update or Other Action |
Reviewed second quarter 2000 remediation system report. |
Donald Seagren |
| 12/6/2000 |
Update or Other Action |
Concurred with Marathon request to terminate monthly sampling and quarterly reporting on remediation system. Added time and expense was not providing any useful information. Semi-annual GW monitoring and reporting will continue |
Donald Seagren |
| 12/18/2000 |
Update or Other Action |
Reviewed project update summary for all Marathon sites in the Kenai Gas Field, Cannery Loop Unit and Beaver creek. Update summary was requested due to change in environmental personnel at Marathon |
Donald Seagren |
| 1/16/2001 |
Update or Other Action |
Reviewed GW monitoring Report and 3rd Quarter 2000 Remediation System Report |
Donald Seagren |
| 4/27/2001 |
Update or Other Action |
Reviewed Remediation System Report, Fourth Quarter 2000 |
Donald Seagren |
| 8/26/2002 |
Update or Other Action |
Review Semiannual GW monitoring Reports, July 01 and November 01. |
Donald Seagren |
| 1/6/2004 |
Update or Other Action |
Received and reviewed July and December 02 monitoring reports. |
Donald Seagren |
| 1/23/2004 |
Meeting or Teleconference Held |
Met with Eric Ward (Marathon). MW's re-surveyed during 2003. Remediation system to be re-started 24 January 04 @ 0900. Stressed importance of keeping remediation system functioning properly to control contaminant plume. |
Donald Seagren |
| 1/23/2004 |
Update or Other Action |
Reviewed June 03 monitoring report. Marathon to work on getting recovery system operating consistently to recover free product and control contaminant plume. |
Donald Seagren |
| 1/26/2004 |
Update or Other Action |
H2Oil Skid operated for 12.5 hours this past weekend. WW transfer issues appear resolved. System will be placed in continuous operations today. It will be monitored daily by operations staff and weekly by American Environmental. |
Donald Seagren |
| 2/3/2004 |
Update or Other Action |
Reviewed Marathon's response to 2002 monitoring report review comments. |
Donald Seagren |
| 3/9/2004 |
Update or Other Action |
File number assigned and entered into the Fileroom DB and CS DB. |
Alyce Hughey |
| 5/25/2004 |
Update or Other Action |
Reviewed December 03 monitoring report. NAPL recovery system problems have been corrected and it is operational. MW 11 & 32 required repair or replacement. Discussed site with Eric Ward of Marathon. |
Donald Seagren |
| 6/24/2004 |
Update or Other Action |
Site inspection. looked at on-going improvements to NAPL recovery system. Discussed repairs to MWs and installation of additional MWs to fill in data gaps. Need to coordinate with COE due to wetlands. May be best to wait until winter for wetlands work. |
Donald Seagren |
| 7/6/2004 |
Update or Other Action |
Approved revised monitoring plan. Entire monitoring system is being reviewed. A plan is being developed to re-work and revise the monitoring system for this pad. |
Donald Seagren |
| 3/9/2005 |
Update or Other Action |
Approve work plan for the installation of 5 additional monitor wells. If monitoring data show the contaminant plume is expanding, additional corrective action measures will be required. |
Donald Seagren |
| 6/2/2005 |
Update or Other Action |
Reviewed July 04 monitoring report. Separate phase product found in 7 MWs. H2Oil remediation system only operated about half the time due to continuing operational problems. 5 additional MWs installed din spring 05 to better define plume and to replace 2 damaged MWs. |
Donald Seagren |
| 8/30/2005 |
GIS Position Updated |
Using Figures 1 and 2 from a July 2004 Monitoring Well Sampling Report Kenai Gas Field Pad 14-6, from American Environmental, dated May 2005, in conjunction with TopoZone Pro and the KPB Parcel Lookup, entered the coordinates for this site. Metadata includes No Topo Basemap, TopoZone Pro Street Map, Black and White Aerial Photo, on a Medium Size Map, View Scale 1:10,000, Coordinated Datum NAD83. High degree of confidence in accuracy of location. |
Alyce Hughey |
| 9/22/2005 |
Streamlined Cleanup Program |
Telephone call with Doug Kinnett & Jennifer Satterwhite, Will be excavating for footers for new WW building tomorrow, What to do with any contamianted soils. After discussion Marathon was told to use best professional judgement. Remove grossly contaminated soil if encountered. Otherwise it may be placed as fill inside foundation and be addressed at a later date. Marathon is developing contaminated soil management plan. |
Donald Seagren |
| 3/10/2006 |
Site Characterization Workplan Approved |
Reviewed and approved work & sampling plan to define the source and extent of the LNAPL plume at MW33. the information will be used to develop a corrective action plan. |
Donald Seagren |
| 10/5/2006 |
Site Characterization Report Approved |
Reviewed 06 Off-Pad LNAPL Site investigation report. the plume around MW33 has been defined. It appears to be from historical release rather than a recent release.The LNAPL plume appears to be from a former waste fluids pit that was located where the Saturn Compressor building is located now. Further study is planned to confirm plume stability as well as determining if there is a more cost effective approaches to remetiaing the hydrocarbons impacts. The current remediation system and monitoring well nextwork will be operated while investigating other remedial options. |
Donald Seagren |
| 4/4/2007 |
Exposure Tracking Model Ranking |
|
Donald Seagren |
| 4/5/2007 |
Update or Other Action |
Contamianted Soil Management Plan reviewed and approved. The management plan details how Marathon will handle contamianted soil discovered during normal maintenance operations on the pads. this plan will apply to all Marathon sites/facilities on the Peninsual. Review and approval coordiantes with PERP. |
Donald Seagren |
| 1/7/2008 |
Site Characterization Workplan Approved |
Review and approve Kenai Gas Field 14-6 Remediation and Groundwater Monitoring Work Plan Final Rev. 2, 11 December 07 |
Donald Seagren |
| 6/12/2008 |
Update or Other Action |
Site transferred from Don Seagren to Paul Horwath per Linda Nuechterlein. |
Alyce Hughey |
| 3/6/2009 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 73411 name: Unknown release & sheening in wetlands |
Janice Wiegers |
| 12/4/2009 |
Document, Report, or Work plan Review - other |
Reviewed the 2008 Groundwater Monitoring and LNAPL Recovery Report, dated September 24, 2009, from OASIS Environmental for Paul Horwath. The groundwater sampling results indicates that concentration and migration trends are not changing at the site. The laboratory analytical results for DRO and Benzene and a Mann-Kendall statistical trend analysis confirm a stable plume and a slightly downward trend in DRO and Benzene concentrations. The surface water samples taken to the west of the pad detected only Toluene and only one sample detected above the groundwater quality standards. Of the three surface soil samples taken to the west of the pad, all three samples detected DRO above the soil cleanup levels, and one sample detected Toluene above the soil cleanup levels. The data results for the continuous groundwater level monitoring indicated that the lowest groundwater levels were mid to late March and the highest groundwater levels were in mid October. The data results for the groundwater levels and LNAPL thickness monitoring indicated that seven monitoring wells had a measurable product of 0.3 feet or greater. The data results of the LNAPL Baildown Testing indicated that of the eleven tests conducted, only one, completed at monitoring well MW-21 in February 2008 resulted in a recovery rate exceeding the minimal effective recovery rate of 0.005 gallons per hour within a 12-hour period. The total amount of free product recovery at the site to date using the High-Vacuum Extraction System and Petropore Passive Skimmers is approximately 843 gallons. |
Alyce Hughey |
| 10/6/2011 |
Document, Report, or Work plan Review - other |
Reviewed the September 7, 2011 Monitoring Well MW-19 Decommissioning Report - Kenai Gas Field Pad 14-6, and prepared by OASIS Environmental for Paul Horwath. On August 30, 2011 monitoring well MW-19 was decommissioned to allow for the construction of a new structure in this location. |
Alyce Hughey |
| 2/22/2012 |
Document, Report, or Work plan Review - other |
Reviewed the 2010 Groundwater Monitoring Summary, dated April 14, 2011, from OASIS Environmental. The groundwater sampling results indicates stable concentrations within the sampled wells; however the amount of measureable product within the wells containing product has increased with product thickness from 0.01 to 2.1 feet of product. Three surface water samples were taken to the west of the pad, with one sample detecting total aqueous hydrocarbons and total aromatic hydrocarbons exceeding the Alaska’s water quality standards at 0.015 mg/L. Three surface soil samples were taken to the west of the pad, with two samples detected DRO above the soil cleanup levels, at 430 mg/kg and 560 mg/kg. |
Alyce Hughey |
| 2/23/2012 |
Document, Report, or Work plan Review - other |
Reviewed the Groundwater/Surface Water Hydrology Evaluation Report, dated May 18, 2011, from OASIS Environmental. The data collected shows that the ground does not freeze to a substantial depth and completely thaws prior to seasonal high groundwater level that occurs in May, and the ground is not frozen during the other high groundwater levels in the fall. The frozen soil conditions were limited to the upper 1.5 feet of soil with soil temperatures below 0 degrees celsius starting from mid January and completely thawed by mid April. |
Alyce Hughey |
| 8/24/2012 |
Document, Report, or Work plan Review - other |
Reviewed the 2011 Groundwater and Surface Water Monitoring Report, Kenai Gas Field Pad 14-6, dated April 11, 2012, prepared by OASIS Environmental. The 2011 surface water sampling was conducted on October 16, 2011 from samples SW-1 through SW-8, and the groundwater monitoring event was performed on October 24, 2011 through October 27, 2011. Monitoring wells MW-1, MW-2, MW-3, MW-13, MW-14, MW-15, MW-21, MW-33 and MW-41 were not sampled due to the presence of LNAPL. Surface water sample SW-1 detected Toluene at 0.0015 mg/L, and surface water sample SW-8 also detected Toluene at 0.0023 mg/L. All other surface water samples did not detect any of the analytes. Product thickness increased by 0.03 to 3.16 feet and in two wells a decrease in thickness was seen by 0.31 to 0.57 feet within MW-1, MW-2, MW-3, MW-13, MW-14, MW-15, MW-21, MW-41, RW-1 and RW-2. DRO concentrations ranged from Non-detect to 26 mg/L in sampled wells, and benzene ranged from Non-detect to 0.011 mg/L in sampled wells. |
Alyce Hughey |
| 6/13/2013 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 73411 Unknown release & sheening in wetlands. |
Paul Horwath |
| 9/27/2013 |
Site Visit |
Inspect surrounding wetland during a time of reportedly high groundwater in the K-Beach area. Purpose was to observe elevation of surface water in the wetland, and to see if any petroleum sheen was visible off the pad in the location of confirmed LNAPL. |
Paul Horwath |
| 12/30/2013 |
Document, Report, or Work plan Review - other |
Reviewed the 2012 Groundwater Monitoring, Surface Water Monitoring, and LNAPL Delineation Report, dated January 15, 2013, prepared by Weston Solutions. The 2012 surface water sampling was conducted on September 24, 2012, and the groundwater monitoring event was performed on September 18, 2012 through September 25, 2012. The Retention Basin Temporary Well Points were installed and gauged on May 25, 2012 through August 31, 2012. Monitoring wells MW-1, MW-2, MW-3, MW-13, MW-14, MW-15, MW-21, MW-33, MW-41, RW-1 and RW-2 were not sampled due to the presence of LNAPL. Monitoring well MW-17 was not sampled because it was frost heaved. Surface water sample SW-7 detected Toluene at 0.0018 mg/L, with PAH’s being detected in all the surface water samples. All surface water samples evaluated for TAH and TAqH met the surface water quality standards. Product thickness in wells ranged from 0.03 to 5.47 feet in gauged wells. The DRO concentrations ranged from non-detect to 27 mg/L and Benzene concentrations ranged from non-detect to 0.036 mg/L. Results of the Retention Basin LNAPL Evaluation performed in the thirty-three temporary well points gauged a total of 6 times between June 2, and August 31, 2012, along with wells MW-4, MW-27, MW-29, MW-33, MW-40 and MW-41 showed that TP-30 had 0.03 feet of product on 6-2-12, and 0.01 feet on 6-14-12 and 8-9-12, TP-17 had 0.01 feet on 6-2-12, and the monitoring wells gauged showed that MW-33 had 0.03 to 0.24 feet of product and MW-41 had 2.36 to 3.35 feet of product. |
Alyce Hughey |
| 9/2/2015 |
Update or Other Action |
Issued approval to transport contaminated soil over to Pad 41-18 for Class II downhole injections. Contaminated soil was excavated during utility burial work. |
Paul Horwath |
| 1/24/2017 |
Document, Report, or Work plan Review - other |
Review and issue a response to ERM’s August 26, 2016 letter, Subject: Groundwater Elevations at KGF 14-6, concerning the LNAPL recovery efforts at Pad 14-6. Request clarification and identification of GW elevations which would be cause for further LNAPL recovery testing. |
Paul Horwath |
| 3/28/2017 |
Update or Other Action |
Received Hilcorp's and ERM's Response to Comments on Groundwater Elevations at
Kenai Gas Fields 14-6 letter report. |
Paul Horwath |
| 8/4/2017 |
Update or Other Action |
Held a teleconference call with Greg Rutkowski, Kelley Nixon, and Stephen Witzmann, to discuss and explore options for LNAPL recovery testing at Pad 14-6. Discussed some alternative approaches, aside form the historical H2Oil system. |
Paul Horwath |
| 9/27/2017 |
Document, Report, or Work plan Review - other |
Issued conditional approval of the 2017 GW Monitoring Work Plan, which was prepared for Hilcorp by Brice. |
Paul Horwath |
| 10/6/2017 |
Site Characterization Workplan Approved |
Approved Brice's 2017 Groundwater Monitoring Work Plan (amended). |
Paul Horwath |
| 6/25/2019 |
Update or Other Action |
Site location was updated on this date. Coordinates for this site are used to determine the presence and position of the site on BLM’s ANCSA Conveyed Land web map. |
Rebekah Reams |
| 7/2/2019 |
Document, Report, or Work plan Review - other |
ADEC approved the 2019 Groundwater Monitoring Program Work Plan, which was prepared by Brice Environmental, as amended by the Brice Environmental June 24th response to ADEC's June 21st work plan review comments. |
Paul Horwath |
| 3/16/2020 |
Document, Report, or Work plan Review - other |
Reviewed the 2019 KGF Groundwater Monitoring Program Report. The elimination of KGF14-6 monitoring wells MW-1, MW-3, MW-14, MW-15 and MW-21 removed the ability to monitor or estimate the concentration of several feet of free product hydrocarbon on the KGF 14-6 pad. Historical data for these monitoring wells should be maintained in the data tables, along with well locations on the maps to aid in the understanding of future impacts and to the understanding of pad dynamics.
|
Peter Campbell |
| 3/3/2021 |
Document, Report, or Work plan Review - other |
Review Contaminated Soil and Water Management Plan for Flow Line Upgrades (February 2021) |
Peter Campbell |
| 3/15/2021 |
Document, Report, or Work plan Review - other |
Flow Line Soil Management Plan Approval |
Peter Campbell |
| 7/8/2021 |
Document, Report, or Work plan Review - other |
Contaminated Soil and Water Management Plan for KGF 14-6 Pig Launcher Excavations ADEC Approval |
Peter Campbell |
| 9/8/2021 |
Document, Report, or Work plan Review - other |
Review and approve 2021 work plan. |
Peter Campbell |
| 3/15/2022 |
Document, Report, or Work plan Review - other |
The elimination of KGF14-6 monitoring wells MW-1, MW-3, MW-14, MW-15 and MW-21 removed the ability to monitor or estimate the concentration of free product hydrocarbon on the KGF 14-6 pad. Require that historical data for these monitoring wells should be maintained in the data tables, along with well locations on the maps to aid in the understanding of potential future impacts and the understanding of pad conditions. Toluene has been detected in all of the surface water sampling locations. Toluene is a component of contamination at the site, but no other components are present in the surface water. This does seem like an anomaly. Hilcorp should consider sampling surficial pore water within the surface peat to determine if contaminates are present. |
Peter Campbell |
| 5/16/2023 |
Document, Report, or Work plan Review - other |
Reviewed 2023 Groundwater Monitoring Program Draft Work Plan Addendum and did not approve the Kenai Gas field plan for 2023. The KGF 14-6 plan was not approved because DEC will require the addition of an analyte, 1,4 Dioxane to four monitoring wells. This testing is to determine if historical glycol releases have impacted groundwater that is moving to the wetlands. 1,4 Dioxane is a degradation product of both ethylene and propylene glycol. |
Peter Campbell |
| 6/28/2023 |
Site Visit |
Pad inspection with DEC staff, Hilcorp Safety and consultant. |
Peter Campbell |
| 3/14/2024 |
Meeting or Teleconference Held |
Meet with Hilcorp to discuss 2024 cathodic protection actions that will involve trenching across 14-6. Hilcorp presented the planned pathway of the trenches. Discussed potential areas of significant soil and groundwater impacts in the trenching path. Hilcorp plans on managing excavation with the same methods established in previous digs. Excavate soils and place next to open trench. If grossly impacted soils are encountered notify DEC. Place impacted soils back into excavation in the order they were removed from the ground ("dirty soils first in and covered with clean soils"). Water will be sent to the Grind and Inject facility. If significant product is encountered, they have been advised to berm the source area trench to stop product from moving over the entire trench. A construction report has been requested to document impacts. |
Peter Campbell |
