| Action Date |
Action |
Description |
DEC Staff |
| 11/8/1999 |
Site Added to Database |
|
Former Staff |
| 11/8/1999 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77808 (Added by System) |
Former Staff |
| 11/9/1999 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
|
Former Staff |
| 3/7/2000 |
Underground Storage Tank Site Characterization or Assessment |
SA Report submitted |
Lynne Bush |
| 7/5/2000 |
Update or Other Action |
Transferred to Pikul. New File # is CS 100.200. |
Lynne Bush |
| 7/5/2000 |
Update or Other Action |
Letter to Hillborn, transferring site to CSRP. Dave Pikul is now Project Manager. |
Lynne Bush |
| 7/15/2000 |
Update or Other Action |
Piping is still in ground. Letter to Hillborn requesting piping removal and associated SA. |
Lynne Bush |
| 3/20/2001 |
Update or Other Action |
CS Program has taken the lead on this site. The contact person is Scott Pexton. The remaining piping has yet to be removed. This will be incorporated into the next phase of the CS work at the site. Please note that STP is still very involved, we just agreed to one point of contact. Site rescored. |
Lynne Bush |
| 8/21/2002 |
Update or Other Action |
RECKEY has automatically been generated. |
Cynthia Pring-Ham |
| 1/21/2005 |
Update or Other Action |
staff changed from Bush to Blessing |
Jim Frechione |
| 8/26/2005 |
Update or Other Action |
File number updated. Combined CS and LUST file, filed under CS number 2107.38.003. |
Aggie Blandford |
| 10/30/2005 |
Update or Other Action |
Approved of Resotration Science and Engineering's request to spread stockpile of formerly contaminated soil on-site. |
Todd Blessing |
| 2/2/2007 |
Update or Other Action |
Reviewed water well study report, which was prepared d by Restoration Science and Engineering (RSE). This report documented the results of a review of state and federal water well records within a ¼ mile radius of the former Sanden Fuel Facility. RSE’s investigation revealed that all wells within a ¼ mile radius of the former Sanden Fuel Facility are served by Anchorage Waste Water and Utility (AWWU) water. In addition, all areas of development within 500 feet radius of the former Sanden Fuel Facility were confirmed to be utilizing AWWU water. RSE concluded in their study that wells on Lots 3, 6, and 7, need field truthing to confirm that they are not used for potable water purposes.
At this time, the Department requests that you hire a qualified impartial third party to develop and submit a site investigation work plan to the Department by May 30, 2007. The work plan should, at a minimum, define the means and methods to do the following:
install at least two monitor wells to define the extent of groundwater contamination originating from the former Sanden Fuel facility;
determine the localized groundwater flow direction;
collect groundwater samples from all existing and newly installed monitor wells to be analyzed for GRO, DRO, benzene, toluene, ethylbenzene, and xylenes; and field truth the usage of wells located on Lots 3, 6, and 7 Block 2, Schroeder Subdivision |
Todd Blessing |
| 4/6/2007 |
Exposure Tracking Model Ranking |
Initial ranking |
Todd Blessing |
| 7/26/2007 |
Update or Other Action |
DEC reviewed and conditionally approved site characterization work plan. The work plan was dated July 12, 2007 and prepared by Restoration Science and Engineering (RSE) in response to the Department's letter dated February 2, 2007. Within the work plan RSE proposes to do the following:
1) Install three groundwater monitor wells, and subsequently sample the groundwater in the newly installed wells to test for contaminants of concern at a DEC approved laboratory.
2) Field truth the usage of wells located on Lots 3, 5, and 7, Block 2, Schroeder Subdivision.
3) Construct a Conceptual Site Model (CSM) showing groundwater gradient.
4) Issue a site investigation report within 60 days from the conclusion of groundwater sampling.
CSP approves of the work plan, dated July 12, 2007, as written with the following modifications:
1) Collect two soil samples from each soil boring advanced at the subject site; one sample will be collected from surface soil (i.e. depth of 0 to 2 foot bgs) while the other sample will be collected from subsurface soil (i.e. depth of 2 to 15 foot bgs); soil samples collected from subsurface soil can be selected based on field screening results; soil samples will be analyzed for GRO, DRO, and BTEX at a DEC approved laboratory.
2) Complete a data review of the CSP checklist for each laboratory data deliverable received.
3) Notify CSP at least two days prior to commencement of field work to allow CSP staff to inspect the work activities. |
Todd Blessing |
| 1/17/2008 |
Update or Other Action |
DEC staff approved of Restoration Science and Engineering's proposal to amend work plan approved on July 26, 2007 to install a downgradient monitor well (i.e. RSE-3) to a new location (on top of a bluff). |
Todd Blessing |
| 10/23/2008 |
Site Characterization Report Approved |
DEC has reviewed Restoration Science and Engineer’s (RSE’s) “Site Characterization Sampling Results of Groundwater at the Former Sanden Fuel Facility and Field Truth of the Usage Status of Water Wells”, dated October 13, 2008. Within this report, RSE presented the sampling results for two groundwater monitoring events. RSE also collected information regarding the usage of existing drinking water wells located on Lots 3, 6, and 7, Block 2, Schroeder Subdivision, Eagle River. Groundwater samples were analyzed for GRO, DRO, RRO and BTEX. DRO and GRO were the only contaminants of concern that were detected at levels that exceed DEC cleanup levels. GRO levels ranged from nondetect to 3.32 mg/L, while DRO levels ranged from nondetect to 210 mg/L. RSE personnel met with the owners of Lot 6, Block 2 and confirmed that a former drinking water well was disconnected. RSE personnel were unable to meet with the owners of Lot 7, Block 2 to confirm that they are utilizing Municipal water. DEC issued a letter on October 23, 2008 commenting on this report and requesting that Mr. Hillborn's consultant conduct an analysis of groundwater concentration trends over time to determine if the groundwater contaminant plume is steady state or declining. DEC also requested a long term groundwater monitoring plan by February 27, 2009. |
Todd Blessing |
| 7/30/2009 |
Update or Other Action |
Updated exposure tracking model results. |
Todd Blessing |
| 8/10/2009 |
Cleanup Complete Determination Issued |
The ADEC has determined there is no unacceptable risk to human health or the environment, and this site will be granted a Corrective Action Complete with ICs determination subject to the following.
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 ADEC may require additional remediation and/or ICs. Therefore, John Hillborn shall report to ADEC every two years to document land use, or report as soon as he becomes aware of any change in land ownership and/or use, if earlier. The report can be sent to the local ADEC 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 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.
3. Future installation of groundwater wells will require approval from ADEC.
4. The monitoring wells installed at the property and the surrounding area may be utilized for area-wide groundwater monitoring as part of a required long term groundwater monitoring plan. However, any monitoring wells (MWs) that are not needed for area-wide monitoring must be decommissioned in accordance with ADEC guidance as soon as it is determined MWs are no longer needed.
5. Any proposal to transport soil or groundwater off site requires ADEC 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. (See attached site figure.)
6. Movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 water quality standards is prohibited.
|
Todd Blessing |
| 8/10/2009 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Todd Blessing |
| 6/30/2011 |
Update or Other Action |
Transferred Project Manager to IC Unit |
Bianca Reece |
| 11/5/2012 |
Institutional Control Compliance Review |
IC review conducted and reminder system set up to check on areawide groundwater monitoring. |
Evonne Reese |
| 12/4/2013 |
Institutional Control Update |
An IC reminder letter was issued to the responsible party on this date. |
Kristin Thompson |
| 8/8/2016 |
Institutional Control Compliance Review |
During an IC compliance review it was discovered that this site is associated with another site having the same file number, known as Former Sanden Fuel (Hazard ID: 1214). These two sites will be managed together from here on out. The IC reminder letter that was issued in December 2013 for this site now also applies to the Former Sanden Fuel site. The reminder system has been re-set for both sites for their five-year follow-up to occur at the end of 2018. |
Kristin Thompson |
| 2/6/2017 |
Institutional Control Update |
This property has been purchased by the Panda Express Corporation. There are plans in the works to demolish the current building and construct a new building that will house a Chinese restaurant. There should be two groundwater wells on the property. The plan is to take samples from each well before considering decommissioning. A workplan will be issued that addresses the management of any contaminated soil encountered during construction, the groundwater wells, and also a Class 5 injection well that will be property characterized and decommissioned according to federal requirements. The new property owners are aware of the history of the property use (gas station) and are willing to cooperate with ADEC in making sure that ICs remain protective. |
Evonne Reese |
| 3/20/2017 |
Document, Report, or Work plan Review - other |
Approved a soil management plan submitted by Restoration Science & Engineering for Panda Express that is intended to meet the institutional controls requirement in regards to complying with ICs while redeveloping property. Construction is due to begin sometime in the spring. The property redevelopment will include the demolition of the existing building, construction of a Panda Restaurant building, and creation of a parking lot area surrounding the new facility. Any soils encountered that are determined to be potentially impacted with be placed within a liked secondary containment area to await proper disposal. Once the excavation is completed and all impacted soils have been segregated soil samples will be collected according to the Field Sampling Guidance. Once characterized the soil will be transported to Alaska Soil Recycling for thermal treatment. |
Evonne Reese |
| 3/20/2017 |
Institutional Control Update |
There is a floor drain remaining on this property which is considered an UIC (Underground Injection Control) so is regulated by the EPA. RSE will submit a UIC Characterization and closure workplan to the appropriate department at EPA.
|
Evonne Reese |
| 3/20/2017 |
Institutional Control Update |
It is believed that there are two groundwater monitoring wells left on this property. During redevelopment activities, a sample will be taken from each well according to the 2016 Field Sampling Guidance and then the wells will be decommissioned according to the 2013 Monitoring Well Guidance. A sampling plan has been requested.
|
Evonne Reese |
| 3/30/2017 |
Institutional Control Update |
Received a copy of the approval sent to Panda Restaurant Group from EPA for the closure plan of the UIC ID No. AK020P5-30-13850. |
Evonne Reese |
| 4/17/2017 |
Institutional Control Update |
I approved a groundwater well sampling and decommissioning report on this date. The sampling will include the wells on the Former Sanden property along with one well on the adjacent Loch Ness property. The Loch Ness well will not be decommissioned, but the wells on the Former Sanden property will be decommissioned. |
Evonne Reese |
| 5/1/2017 |
Document, Report, or Work plan Review - other |
On April 21, 2017 RSE sampled groundwater monitoring wells RSE-1, RSE-2, and B4MW (located on the adjacent Loch Ness property). RSE-1 and B4MW resulted in detections of DRO and RRO exceeding ADEC groundwater cleanup standards. However, ADEC approved decommissioning of wells RSE-1 and RSE-2 since they could be an obstruction to the construction project at the former Sanden Property. Normally with DRO concentrations as high as this last sampling event showed, we would not approve the decommissioning of the wells, but we know that they could be an obstruction for the construction project. We may need to consider reinstallation at a future date once the project is completed. Once we have the larger project report with sampling data and conclusions to evaluate, we can decide at that time. Also approved the purge water from the groundwater sampling event be filtered through granular activated carbon and surface discharged, as long as the GAC water isn't poured out in the vicinity of any surface water or other sensitive area. Well decommissioning is planned for May 4, 2017. |
Evonne Reese |
| 5/31/2017 |
Institutional Control Update |
Received an update from Restoration Science & Engineering (RSE) regarding the first day of the construction to convert this property to a Panda Express Restaurant. Soil adjacent to the former dispenser was found to have a hydrocarbon odor. In addition, on the north side of the existing building a 300 gallon UST was discovered that is mostly empty of fuel. It is believed that the UST is a heating oil tank but the bottom residual contents will be sampled to verify the tank's purpose. After the tank was removed the soil was placed back into the excavation. RSE has requested that the area be re-excavated in order to take confirmation samples from the soil around the former tank. There was also a small amount of contamination under some piping that field screening showed mildly elevated concentrations. Approximately one cubic yard of contaminated soil was excavated from this location and placed on and also covered with visqueen. A sample was taken at the bottom of this excavation location and resulted in a field screening of non-detect. Future updates on the site progress will continue. Site soil remediation and characterization plans were approved via email by Bill O'Connell, Contaminated Sites Program Manager. |
Evonne Reese |
| 6/5/2017 |
Institutional Control Update |
On May 30, 2017 RSE returned to the project site and re-excavated the area previously containing the removed underground storage tank. All PID field screening readings were less than 1 ppmv. RSE submitted two (2) laboratory bottom samples to SGS and one (1) blind duplicate. Samples were analyzed for DRO, RRO, GRO and BTEX. All results were below ADEC Method 2 Soil Cleanup Levels.
|
Evonne Reese |
| 6/5/2017 |
Offsite Soil or Groundwater Disposal Approved |
The transport and disposal of the contaminated soil stockpile (~ 3 cubic yards) generated during the recent construction and investigation was approved by Bill O'Connell, Contaminated Sites Program Manager. |
Evonne Reese |
| 6/12/2017 |
Institutional Control Update |
Site construction continues. An additional UST was discovered on this date located on the east portion of the lot 25 feet from the sidewalk, near the entrance to the property approximately one foot below ground surface. The tank remains in the soil waiting for assessment. If contamination is encountered the contractors will stockpile the impacted soil and collect samples for laboratory analysis. |
Evonne Reese |
| 7/19/2017 |
Institutional Control Update |
Received an update from the consultant on recent site work. The second tank was removed and the soil surrounding the tank was found to have DRO impacts that exceeded migration to groundwater levels, but did not exceed inhalation or ingestion cleanup levels. The consultant performed a drinking water well search of the area and determined that the shallow unconfined groundwater on the project site is not used as a drinking water source. In the near future the site characterization details from the recent site work will be compiled into a report which includes project conclusions and recommendations.
|
Evonne Reese |
| 8/4/2017 |
Document, Report, or Work plan Review - other |
Received a copy of an underground injection control Class V Injection Well Closure Report which was sent to EPA on July 31, 2017 by Panda Express' consultant Restoration Science & Engineering. |
Evonne Reese |
| 8/24/2017 |
Document, Report, or Work plan Review - other |
Reviewed a soil management reported dated August 7, 2017 which detailed the excavation activities on May 25th, May 30th, and June 21, 2017. The construction activities were the start of a project to construct a new parking lot with asphalt paving and a building which will house a Panda Express restaurant. This site record was closed with remaining institutional control (IC) requirements in 2009. The IC requirements were placed on the property to protect people from the risk of exposure. DEC and the consultants/contractors involved with the construction were aware that contamination would most likely be encountered in the subsurface soil. The appropriate number of samples were taken from each tank area along with the tank piping. Laboratory analyses were performed for DRO, GRO, and BTEX in all samples. Closure samples collected from UST-2 yielded DRO results above the most stringent ADEC cleanup levels, with concentrations up to 1,690 mg/kg DRO. Samples for the in-soil tank piping showed benzene, ethylbenzene, and total xylenes above the most stringent cleanup levels. About 5 cubic yards of petroleum contaminated soil was removed and properly disposed of with DEC approval. DEC agrees with the report conclusion that the paving on the property, along with the ICs already in place should continue to provide protection from the risk of exposure. |
Evonne Reese |
| 8/25/2017 |
Document, Report, or Work plan Review - other |
Reviewed a groundwater monitoring and well decommissioning report. Monitoring wells RSE-1, RSE-2, and B4MW were sampled for GRO, DRO, RRO, and BTEX on April 21, 2017. All analyte concentrations were below Table C cleanup levels for RSE-2. DRO and RRO were above Table C cleanup levels for RSE-1 and B4MW. All sample results for GRO and BTEX were below the Table C cleanup levels. Monitoring wells RSE-1 and RSE-2 were decommissioned to assist in the redevelopment of the property. Monitoring well B4MW (located on adjacent condominium property) was left in place. |
Evonne Reese |
| 2/26/2019 |
Institutional Control Compliance Review |
IC compliance review conducted. The Affiliates information for landowner was verified with the Municipality of Anchorage. The next compliance review and reminder letter will be completed in 3 years time. |
Evonne Reese |
| 6/17/2024 |
Institutional Control Compliance Review |
IC compliance review completed on this date. An IC reminder letter was issued to the landowner. The next review will be in five years’ time. |
Gaige Robinson |
