| Action Date |
Action |
Description |
DEC Staff |
| 7/10/2014 |
Site Characterization Workplan Approved |
Approved work plan for site characterization activities to determine extent of petroleum contamination remaining on site. |
Melody Debenham |
| 7/15/2014 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PERP staff Gay Harpole. Spill no. 13269921801; spill date = 6/10/13; substance = diesel; quantity = unknown. |
Mitzi Read |
| 7/16/2014 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 7/16/2014 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79648 name: Above Ground Diesel Heating Oil Tank & Fuel Lines |
Mitzi Read |
| 8/20/2014 |
Site Visit |
Site visit with NPS staff and contractors. Field screening and soil sampling performed to delineate the limits of remaining petroleum contamination. |
Melody Debenham |
| 9/30/2014 |
Potentially Responsible Party/State Interest Letter |
Potentially responsible party letter sent to the National Park Service. |
Melody Debenham |
| 12/17/2014 |
Site Characterization Report Approved |
Approved final Report for Nonvianuk Ranger Cabin Soil and Groundwater Site Assessment 2014 describing soil sampling at the former above ground storage tank location. Soil sample results indicate approximately 3 cubic yards of petroleum contaminated soil remain on-site. The sample from 1.5 feet had a maximum concentration of 28,000 mg/kg DRO. The sample from the same location at a depth of 5 feet was non-detect for DRO. Groundwater was anticipated to be 2.5 feet below the ground surface, however once on site, it was determined that groundwater is an estimated 15 feet below the ground surface. No groundwater was encountered. |
Melody Debenham |
| 9/15/2015 |
Document, Report, or Work plan Review - other |
Approved final 2015 work plan for Katmai Petroleum Sites including Brooks Camp North, Brooks Camp Parking Lot, Brooks Lake, and Nonvianuk Ranger Cabin. Work at Nonvianuk Ranger Cabin includes adding fertilizer to the remaining petroleum contaminated soil. |
Melody Debenham |
| 11/30/2015 |
Document, Report, or Work plan Review - other |
Approved final 2015 Nonvianuk Ranger Cabin Trip Report documenting on-site treatment of petroleum contaminated soil by incorporating fertilizer. |
Melody Debenham |
| 7/13/2016 |
Document, Report, or Work plan Review - other |
Approved final work plan for soil sampling to determine the remaining level of diesel range organics. |
Melody Debenham |
| 11/1/2016 |
Document, Report, or Work plan Review - other |
Approved final report documenting soil sampling at Nonvianuk Ranger Cabin. Contaminated soil remains above the cleanup level in the southwest corner of the excavation. |
Melody Debenham |
| 8/15/2017 |
Cleanup Plan Approved |
Although a current consensus on cleanup level goals has yet to be achieved, DEC approved the remediation actions within this soil remediation work plan. The National Park Service has not used Migration to Groundwater cleanup level goals at this site as groundwater is unlikely to be used, however DEC will require demonstration of groundwater protectiveness. |
Gretchen Caudill |
| 9/22/2017 |
Document, Report, or Work plan Review - other |
DEC Approval – 2017 Nonvianuk Ranger Cabin Trip Report. Thirty pounds of PersulfOx® were added to an excavated area of soil identified to exceed 18 AAC 75.341, Table B2 Ingestion cleanup levels and 25 pounds were added to the remaining impacted area. NPS recommends evaluation of soils in 2018 for volatile organic compounds, diesel range organics, and polycyclic aromatic hydrocarbons. DEC recommends analytical soil samples be taken throughout impacted area in 2018, to include the newly ursine-disturbed area, to fully assess remaining contamination on site. |
Gretchen Caudill |
| 6/8/2018 |
Document, Report, or Work plan Review - other |
DEC Comments - Draft Work Plan - Nonvianuk Ranger Cabin Soil Sampling. The work plan details the follow up sampling of soils in the in situ remediation area adjacent to the cabin. DEC is concerned the full extent of contamination above MTGW cleanup levels has still not been delineated and the groundwater pathway remains a data gap. |
Gretchen Caudill |
| 7/3/2018 |
Document, Report, or Work plan Review - other |
DEC Approval - Nonvianuk Ranger Cabin Soil Sampling Work Plan |
Gretchen Caudill |
| 8/10/2018 |
Update or Other Action |
DEC Approval – Work Plan Addendum. This work plan addendum details additional soil sampling at deeper intervals within the remediation area to evaluate the potential for contamination to reach groundwater. |
Gretchen Caudill |
| 11/30/2018 |
Document, Report, or Work plan Review - other |
DEC Approval – 2018 Nonvianuk Ranger Cabin Soil Sampling Report. This report details soil sampling within the remediation area at the ranger cabin to evaluate the effects of in situ treatment of contaminated soils. Five soil samples were taken at surface locations and four soil samples were taken at a depth of five feet. Samples were analyzed for DRO, VOCs, and PAHs. VOCs and PAHs were not detected in any samples and the detected concentrations of DRO in surface soil have decreased since the last analytical sampling event. DRO concentrations at five feet were below cleanup levels indicating a limited pathway for contamination to reach groundwater. The National Park Service has requested that DEC consider a closure with no further action required decision for the site. |
Gretchen Caudill |
| 11/22/2019 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79648 Above Ground Diesel Heating Oil Tank & Fuel Lines. |
Tim Sharp |
| 12/17/2019 |
Cleanup Complete Determination Issued |
The remediation at this site is complete. All soil samples have shown contaminant concentrations below site specific cleanup levels. |
Tim Sharp |
