| Action Date |
Action |
Description |
DEC Staff |
| 5/29/2001 |
Site Added to Database |
Petroleum contamination. Site originally included with the AT&T Annex Maintenance Facility site in the VCP. Sites were split at request of PacifiCorp. |
Bruce Wanstall |
| 1/9/2003 |
Site Ranked Using the AHRM |
Initial ranking. |
Anne Marie Palmieri |
| 2/27/2003 |
Update or Other Action |
Responsible Party field changed based on new information from PacificCorp Environmental Remediation Company. |
Elizabeth Stergiou |
| 5/25/2006 |
Update or Other Action |
Updated the RP information. |
Deborah Williams |
| 9/13/2006 |
Update or Other Action |
ADEC reviewed Alta Geosciences Inc. 2006 Site Characterization Report for the AT&T Fairbanks Warehouse site. According to the report, contaminated soil is located south of the motor pool. The contaminated soil (estimated at 300 to 600 cu yds) is present from less than 2.5 feet to approximately 10 or 12 feet bgs. The north, east, and west extents of contamination appear to be delineated but the southern extent is not well defined. Contamination extends greater than 20 feet south of the 1998 excavation and possibly onto the 30th Avenue right-of-way. There are limited groundwater impacts. DRO and benzene slightly exceed cleanup levels in the source area. Benzene exceeds the cleanup level for approximately 100 feet downgradient. |
Deborah Williams |
| 5/16/2007 |
Update or Other Action |
ADEC received the 2006 Soil Remediation report for the AT&T Fairbanks Warehouse site. The conclusions from the report for 2006 are the following: A total of 417 tons of DRO contaminated soil were exported offsite for thermal remediation. This brings the total volume of impacted soil removed from the site to approximately 1,027 tons of removed contaminated soil. 3,300 gallons of contaminated groundwater was extracted from the excavation and treated with the soil. Soil remains in the bottom of the excavation at levels up to 7,300 ppm DRO and 0.037 ppm benzene. Cleanup levels were reached along the north, west and southwest sides of the excavation. Contaminated groundwater remains along the southeast and east sides of the excavation area. The remaining impacted soils are approximately one to two feet in thickness and approximately 7 to 8 feet bgs. |
Deborah Williams |
| 4/15/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Tamara Cardona-Marek |
| 4/16/2008 |
Update or Other Action |
Added to file the 2007 Investigation Workplan. |
Tamara Cardona-Marek |
| 5/14/2008 |
Update or Other Action |
ADEC received the 2007 Groundwater Monitoring Report and 2007 Well Installation Report for the AT &T/ Alascom Warehouse site. |
Tamara Cardona-Marek |
| 10/29/2008 |
Meeting or Teleconference Held |
ADEC met with Alex Tula and Larry Bamberger (AT&T) to review status of the site. The addition of a monitoring well on the southwest corner of the property is currently being contemplated. Consultant will develop conceptual site model and do a well survey during this winter. ADEC would like to make sure there is no migration of contamination off-site. Source area continues to have DRO above cleanup levels, this is expected since there is contamination in the smear zone. |
Tamara Cardona-Marek |
| 6/26/2009 |
Document, Report, or Work plan Review - other |
ADEC received the 2008 Groundwater Monitoring Report. Well within the source area continues to exceed cleanup levels for DRO. DRO concentrations in downgradient wells are below the cleanup levels but have increased from previous events. |
Tamara Cardona-Marek |
| 6/26/2009 |
Proposed Plan |
ADEC received the Well Installation Work Plan for the installation of an additional monitoring well downgradient of the source area. The plan has been approved by ADEC. |
Tamara Cardona-Marek |
| 4/8/2010 |
Document, Report, or Work plan Review - other |
DEC received the 2009 Groundwater Monitoring Report for the Fairbanks Warehouse Site.
A new well was installed downgradient of the source area. DRO concentrations were only detected in well MW-7 located within the source area. DRO concentrations were slightly above cleanup levels (2.01 mg/L). No updated CSM was submitted with this monitoring event. |
Tamara Cardona-Marek |
| 4/13/2010 |
Update or Other Action |
DEC requested that ATT submit a request for a cleanup complete that includes an updated CSM, a summary of the history of the site, a summary of actions performed and any other relevant information that may assist in making a final determination at the site. |
Tamara Cardona-Marek |
| 6/22/2010 |
Update or Other Action |
Address has been updated from 717 30th Ave. to 704 30th Ave. based on the borough records for Rees Subdivision Lot 4. |
Tamara Cardona-Marek |
| 6/25/2010 |
Institutional Control Record Established |
1.Any future change in land use may impact the exposure assumptions cited in this document. If land use and/or ownership changes, current ICs may not be protective and DEC may require additional remediation and/or ICs. Therefore AT & T Inc. shall report to DEC every five years to document land use, or report as soon as AT & T becomes aware of any change in land ownership and/or use, if earlier. The report can be sent to the local DEC office or electronically to DEC.ICUnit@alaska.gov.
2.A Notice of Environmental Contamination (deed notice) shall be recorded in the State Recorder’s Office and a copy of that recorded notice be provided to DEC by August 15, 2010 that identifies the nature and extent of contamination at the property and any conditions that the owners and operators are subject to in accordance with this decision document (Attachment C).
3.Installation of any drinking water well or groundwater monitoring wells will require approval from DEC.
4.Any proposal to transport soil or groundwater off site requires DEC approval in accordance with 18 AAC 75.325 (i). A “site” [as defined by 18 AAC 75.990 (115)] means an area that is contaminated, including areas contaminated by the migration of hazardous substances from a source area, regardless of property ownership.
5.Remaining soil contamination is located between the warehouse building (and possibly underneath) and 30th Avenue. When the building is removed and the soil becomes accessible, the soil must be evaluated and contamination addressed in accordance with a DEC approved work plan.
6.Groundwater monitoring well MW-7 must remain in place and be sampled every two years for DRO and BTEX beginning in 2011 until two consecutive events show that contaminants are below the established cleanup levels. All other wells must be decommissioned (now or after the monitoring is finalized) in accordance with DEC guidance, and documented in a report submitted to DEC. A report for the groundwater monitoring must be provided to DEC by December 31st of each year that monitoring occurs.
7.Movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 water quality standards is prohibited. |
Tamara Cardona-Marek |
| 6/25/2010 |
Cleanup Complete Determination Issued |
DEC has granted a cleanup complete with institutional controls determination |
Tamara Cardona-Marek |
| 8/4/2010 |
Update or Other Action |
ATT called to indicate they will be submitting the institutional control agreement past the requested date. |
Tamara Cardona-Marek |
| 3/2/2011 |
Document, Report, or Work plan Review - other |
DEC received from Alta Geosciences a 2010 Groundwater Monitoring Report. Well MW-7 was sampled for DRO, the sample contained 2.31 mg/L DRO. No BTEX analysis was performed and no duplicate sampled was collected. This sampling event was not part of the requirements of the cleanup complete determination. The monitoring requirement of the Cleanup Complete with Institutional Controls determination will begin in 2011.
All other monitoring wells have been decommissioned. |
Tamara Cardona-Marek |
| 3/31/2011 |
Institutional Control Compliance Review |
IC review conducted.
|
Erik Norberg |
| 2/1/2012 |
Update or Other Action |
Staff changed from Cardona-Marek to IC Unit. |
Evonne Reese |
| 2/2/2012 |
Update or Other Action |
Sent IC reminder letter to the RP. |
Evonne Reese |
| 5/7/2012 |
Document, Report, or Work plan Review - other |
DEC received the 2011 Groundwater Monitoring Report. DRO was detected in well MW-7 above the cleanup levels at concentrations of 1.52 and 2.13 mg/L (duplicate sample). No BTEX were detected. The next monitoring event is expected to occur in 2013. |
Tamara Cardona-Marek |
| 12/4/2013 |
Update or Other Action |
Site symbol visually adjusted using ArcGIS and documents from file. 12/04/13; MLB. 64.819459, -147.717210. |
Michelle Barnes |
| 5/2/2014 |
Document, Report, or Work plan Review - other |
ADEC received the 2013 Groundwater Monitoring Report. DRO was detected in well MW-7 above the cleanup levels at concentrations of 1.41 and 1.96 mg/L (duplicate sample). BTEX data have met ADEC's groundwater cleanup criteria for two successive events (2011 and 2013) and therefore MW-7 will be sampled for DRO only in the future. Next monitoring event expected to occur in 2015. |
Kristin Thompson |
| 5/13/2016 |
Institutional Control Compliance Review |
IC compliance review conducted. IC reminder letter requesting the 2015 groundwater monitoring results was issued to the landowner on this date. Reminder system set to follow-up in one month. |
Kristin Thompson |
| 7/25/2016 |
Institutional Control Update |
In response to the IC reminder letter, a representative of the landowner contacted ADEC. The 2015 sampling event has been conducted and the consultant is in the process of completing and submitting the report to ADEC. |
Kristin Thompson |
| 8/18/2016 |
Document, Report, or Work plan Review - other |
ADEC received the 2015 Groundwater Monitoring Report submitted by Alta Geosciences, Inc. Monitoring well MW-7 was sampled on July 15, 2015. A duplicate sample was also collected. Samples were analyzed for DRO. Both samples were slightly above ADEC cleanup levels (3.21 mg/L DRO in MW-7, and 3.29 mg/L DRO in duplicate sample). The next groundwater monitoring event is expected to occur in 2017. |
Kristin Thompson |
| 9/1/2016 |
Update or Other Action |
Received updated contact information and updated the affiliates. |
Kristin Thompson |
| 7/19/2017 |
Institutional Control Compliance Review |
IC compliance review conducted. As established in the 2010 Cleanup Complete with ICs Determination, a Notice of Environmental Contamination was required to be recorded in the State Recorder's Office. However, it appears this document was never recorded as requested. A letter was issued to the landowner this date, explaining ADEC's determination to file the deed notice on their behalf. If the landowner does not respond with questions or concerns by September 1st, ADEC will proceed with filing of the deed notice in the Fairbanks Recording District. |
Kristin Thompson |
| 9/7/2017 |
Institutional Control Update |
ADEC mailed the NEC for filing in the Fairbanks District of the State Recorder's Office on this date. |
Kristin Thompson |
| 5/30/2018 |
Institutional Control Update |
Emailed the consultant this date to request the 2017 groundwater monitoring report. |
Kristin Thompson |
| 5/30/2018 |
Institutional Control Update |
The consultant responded to let us know that the 2017 groundwater monitoring report is currently with the client for final review and should be sent out to ADEC in a week. |
Kristin Thompson |
| 7/12/2018 |
Document, Report, or Work plan Review - other |
ADEC received the 2017 Groundwater Monitoring Report submitted by Alta Geosciences, Inc. Monitoring well MW-7 was sampled on July 14, 2017. A duplicate sample was also collected. Samples were analyzed for DRO. Both samples were slightly above ADEC cleanup levels (2.83 mg/L DRO in MW-7, and 2.71 mg/L DRO in duplicate sample). These concentrations show a decrease from the 2015 sampling. The next groundwater monitoring event is expected to occur in 2019. |
Evonne Reese |
| 10/24/2019 |
Document, Report, or Work plan Review - other |
ADEC received the 2019 Groundwater Monitoring Report submitted by Alta Geosciences, Inc. Monitoring well MW-7 was sampled on September 8, 2019. A duplicate sample was also collected. Samples were analyzed for DRO. Both sample concentrations were below ADEC cleanup levels (1.0 mg/L DRO in MW-7, and 0.940 mg/L DRO in duplicate sample). These levels show a decrease from the 2017 sampling. The next groundwater monitoring event is expected to occur in 2021. According to the 2010 Cleanup Complete documentation, before groundwater monitoring requirements can be removed two consecutive events must demonstrate that contaminants are below the established cleanup levels. |
Evonne Reese |
| 11/30/2022 |
Long Term Monitoring Workplan or Report Review |
DEC received the 2021 Groundwater Monitoring Report submitted by Alta Geosciences, Inc. Monitoring well MW-7 was sampled on October 4, 2021. A duplicate sample was also collected. Samples were analyzed for DRO. Both sample concentrations were below ADEC cleanup levels. Since two consecutive events have demonstrated that contaminants are below the established cleanup levels, future groundwater monitoring requirements are rescinded. The monitoring well should be decommissioned within the next year.
|
Evonne Reese |
| 12/6/2022 |
Institutional Control Compliance Review |
IC compliance review completed and a letter was issued to AT&T informing them that future groundwater monitoring requirements are rescinded and also as a reminder of remaining ICs. |
Evonne Reese |
| 12/6/2022 |
Institutional Control Update |
Approved a groundwater well decommissioning plan on this date. This plan was designed based on the DEC 2013 Groundwater Well Guidance. |
Evonne Reese |
| 9/21/2023 |
Document, Report, or Work plan Review - other |
Received the September 2023 Groundwater Well Decommissioning Report on this date. The onsite well was successfully decommissioned. |
Evonne Reese |
