Action Date |
Action |
Description |
DEC Staff |
2/12/2013 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PERP staff Crystal Smith. Spill no. 12119928201; spill date = 10/8/12; substance = petroleum; quantity = unknown; source = Class V injection well. |
Mitzi Read |
2/19/2013 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
2/19/2013 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79406 name: Class V Injection Well |
Mitzi Read |
4/24/2013 |
Meeting or Teleconference Held |
Contaminated Sites Program project managers attended a meeting with Scott Gray and Kris Benson at the Southeast Regional Office in Juneau to discuss the dismantling of Class V Wells at ADOT&PF facilities and agreements made between ADOT&PF and EPA Compliance Office for the federal Underground Injection Well Program. The discussion covered two ADOT facilities in Southeast Alaska: Skagway and Wrangell where petroleum release from each of the systems is confirmed by validated soil data. |
Bruce Wanstall |
4/25/2013 |
Document, Report, or Work plan Review - other |
DEC has reviewed: Class V Injection Well Closure Report Wrangell Airport Sand and Chemical Storage Building Wrangell, Alaska (Report), dated January 30, 2012. R&M Consultants Inc. (R&M) completed the report documenting environmental assessment at the Wrangell site during a project to decommission a Class V Injection Well System.The site activity met the objectives of the project and review of the sample collection found that the number of representative samples collected is acceptable and the precision, accuracy and completeness of the resulting analytical data is generally sufficient to support the decision making process. In accordance with Title 18 Alaska Administrative Code (AAC) 75.360, qualified person(s) used data collection and field screening methods consistent with DEC methodology. Based on information in the Report, with the exception of the field preservation of volatile soil samples, the data meet field and laboratory report quality assurance criteria in Contaminated Sites Program guidance documents, therefore the Report is approved in accordance with 18 AAC 75.335(d). |
Bruce Wanstall |
6/14/2013 |
Update or Other Action |
R&M was able to obtain a letter from the laboratory stating that a lab technician made an error on the sample receipt form during the chain of custody transfer of the samples from R&M. DEC accepts this a data quality assurance clarification and as a result affirms that the GRO and VOC data in the R&M Report is not biased low and GRO and VOC compounds may be dropped from the analyte list for the pending groundwater investigation. DEC concurs with the recommendation in the R&M Report to dispose of soil stockpile at the City of Wrangell landfill.
DEC requested ADOT&PF submit a work plan to investigate groundwater for impacts from residual soil contamination remaining under the septic drain field. R&M Report data show total metals in soil are at levels within the range of background for the area and are removed as contaminants of concern. If future site activity exposes subsurface piping DOT will decommission the piping and collect laboratory samples to characterize remaining soil for contaminants of concern DRO & RRO. |
Bruce Wanstall |
7/12/2013 |
Update or Other Action |
In the approval letter for the R&M Report of site assessment in conjunction with demolition of the oil water separator and drain field, DEC requested that DOT investigate the extent of petroleum contamination in subsurface soil under the former OWS drain field. DEC prepared an ArcGIS map display of possible well locations and suggestions for drill boring & monitoring well plan for the DOT RFP. |
Bruce Wanstall |
12/13/2013 |
Offsite Soil or Groundwater Disposal Approved |
DEC authorized DOT to transport contaminated soil from the site and the City and Borough of Wrangell accepted the 5 cubic yards of waste material from the SE corner of the DOT Wrangell S&C Blg maintenance building to Wrangell's inert waste monofill adjacent to the City rifle range. |
Bruce Wanstall |
2/6/2014 |
Document, Report, or Work plan Review - other |
DEC evaluated a proposed groundwater investigation work plan and sent an approval letter with comment to DOT. |
Bruce Wanstall |
3/14/2014 |
Document, Report, or Work plan Review - other |
DEC sent approval to DOT&PF by email regarding the final version of the workplan to advance borings, install wells and investigate groundwater for contamination. DOT&PF will collect soil samples from the borings and from the wells after completion for DRO and RRO analysis. |
Bruce Wanstall |
6/11/2014 |
Site Visit |
DEC performed a brief inspection of the drainfield excavation and contaminated soil removal site at the maintenance facility. Monitor wells are scheduled to be installed in 2014 |
Bruce Wanstall |
1/30/2015 |
Site Characterization Report Approved |
DEC has evaluated the Site Characterization Sampling Report by R&M Consulting and provides approval and comment by letter sent by electronic and regular mail today. The volume of soil in the vadose zone under the sewer drain field mound is not estimated and has not been directly characterized for contamination by sampling and analysis. The inaccessible subsurface soil is characterized using groundwater data. Uncertainty exists regarding petroleum fluids that may remain in the intact eastern effluent pit located under the sewer drain field mound. DEC requests ADOT&PF perform biannual groundwater characterization sampling beginning in 2015 with biennial reporting beginning in 2016. Report evaluation by DEC will determine a schedule for future long term monitoring. Analyze samples for DRO and RRO; cleanup levels are 1.5 milligrams per liter (mg/L) and 1.1 mg/L respectively, as listed in 18 AAC 75.345(b)(1) Table C.
|
Bruce Wanstall |
2/4/2015 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79406 Class V Injection Well. Contamination is present in subsurface soil at concentrations > the MTG DRO cleanup level, > the ingestion RRO cleanup level and DRO/RRO in groundwater < Table C cleanup levels. |
Bruce Wanstall |
12/10/2015 |
Document, Report, or Work plan Review - other |
DEC reviewed and by letter approved in accordance with 18 AAC 75.335(d) Draft Groundwater Monitoring Spring 2015 Wrangell Airport Sand and Chemical Storage Building Former Class V Injection Well by R&M Consultants, Inc. documenting groundwater sampling at the referenced Site. DRO and RRO concentrations in the groundwater samples from all three wells were below the laboratory reporting limits and the respective Method Two Table C cleanup levels. DEC requested ADOT&PF submit for approval a plan to decommission the wells. |
Bruce Wanstall |
5/5/2016 |
Document, Report, or Work plan Review - other |
DEC approved the ADOT&PF Decommissioning Report for three site groundwater monitoring wells in accordance with DEC guidance specifications. |
Bruce Wanstall |
5/5/2016 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79406 Class V Injection Well. |
Bruce Wanstall |
9/21/2016 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Bruce Wanstall |
9/21/2016 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79406 Class V Injection Well. |
Bruce Wanstall |
9/28/2016 |
Cleanup Complete Determination Issued |
DEC has determined that contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment. No further action will be required as long as the institutional controls are maintained and effective and no new information becomes available that indicates contamination poses an unacceptable risk. |
Bruce Wanstall |
9/28/2016 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79406 Class V Injection Well. |
Bruce Wanstall |
10/6/2016 |
Institutional Control Compliance Review |
IC compliance review conducted. Staff changed from Bruce Wanstall to IC Unit. Closure documentation uploaded to the database. Reminder system set to follow-up on the ICs Agreement page and the recorded deed notice in one month. Subsequent compliance reviews will occur every five years. |
Kristin Thompson |
11/14/2016 |
Institutional Control Update |
Recorded deed notice received. |
Kristin Thompson |
11/23/2016 |
Institutional Control Update |
IC reminder letter issued requesting the ICs Agreement Page be signed and returned. |
Kristin Thompson |
11/23/2016 |
Institutional Control Update |
Spoke with an ADOT&PF representative regarding the ICs on this site. They did not sign the ICs Agreement Page, but are aware of the conditions placed on the site. ADEC will issue an IC reminder letter on a scheduled basis, every five years. |
Kristin Thompson |
7/16/2024 |
Institutional Control Compliance Review |
IC compliance review completed on this date. An IC reminder letter was e-mailed to the landowner. The next review will be in five years’ time. |
Gaige Robinson |