| Action Date |
Action |
Description |
DEC Staff |
| 3/8/2005 |
Site Added to Database |
DRO and benzene. Site reported to ADEC on 3/8/2005 by email summary prepared by Shannon & Wilson, indicating that a Phase II was conducted in February 2005. |
Sarah Cunningham |
| 10/19/2005 |
Offsite Soil or Groundwater Disposal Approved |
On 10/19/2005 ADEC approved transport of two drums of investigation-derived DRO-contaminated soil to Alaska Soil Recycling for thermal remediation. |
Former Staff |
| 11/4/2005 |
Update or Other Action |
ADEC received the October 2005 "Phase II ESA and Release Investigation, South Park Trailer Court, 3007 Arctic Boulevard" prepared by Shannon & Wilson (S&W) reporting work done from February to August 2005. Work included installing 3 temporary and 8 permanent groundwater monitoring wells; sampling soil and groundwater samples, including sampling an on-site soil stockpile; performing a limited drinking water well search; conducting a vertical survey of the monitoring wells; and performing a limited fuel pipeline survey. advancing 11 soil borings, |
Former Staff |
| 4/4/2007 |
Potentially Responsible Party/State Interest Letter |
ADEC letter sent dated 4/4/2007 notifying responsible party of cost recovery requirements.
|
Eileen Olson |
| 4/13/2007 |
Update or Other Action |
Initial ranking with ETM completed for source area id: 75089 name: Fuel pipeline system |
Eileen Olson |
| 4/13/2007 |
Document, Report, or Work plan Review - other |
ADEC review letter sent for "Phase II ESA and Release Investigation, October 2005." The report documented fuel contamination of soil and groundwater, with DRO and benzene concentrations exceeding site cleanup level. The contamination appears to be associated with an onsite, underground piped fuel distribution system that was abandoned in place. The full extent of the contamination has not been defined. ADEC's review letter requests a plan for additional site assessment, a drinking water well search, removal of all accessible heating fuel pipelines and evaluation of the associated pipeline corridors at the time of removal, and a sampling and analysis plan for the existing monitoring wells. ADEC also requested a copy of the Phase I ESA referenced in the subject report. |
Eileen Olson |
| 4/13/2007 |
Exposure Tracking Model Ranking |
Intitial Ranking Complete for Source Area: 75089 (Autogenerated Action) |
|
| 4/7/2009 |
Document, Report, or Work plan Review - other |
ADEC letter dated 4/7/2009 approves the "Release Investigation and Groundwater Monitoring" plan dated September 12, 2007 that proposes installing an additional monitoring well, sampling three existing monitoring wells and the new monitoring well, and sampling the onsite drinking water well. The letter includes the comment that some of the requirements of ADEC’s April 13, 2007 review letter have not been met and will need to be addressed in the future. |
Eileen Olson |
| 4/17/2009 |
Update or Other Action |
On 4/17/2009 ADEC received "Phase I Environmental Site Assessment . . . February 2005" prepared by Shannon & WIlson, Inc. ADEC requested the report in past correspondence; most recently in the plan review letter dated April 7, 2009. |
Eileen Olson |
| 5/4/2009 |
Meeting or Teleconference Held |
ADEC met at the site on 5/4/2009 with responsible party representatives, consultant Shannon & Wilson and neighboring property owners (Nancy Starn and son Bill Starn) to review the prospective location of a monitoring well on the neighbors' property. Placement of a monitoring well between the home and the contaminated monitoring well is warranted. The drinking water well on the Starn property is reportedly over 100 feet deep. |
Eileen Olson |
| 5/6/2009 |
Update or Other Action |
ADEC received emails dated May 6th & 7th 2009 from consultant S&W and the responsible party (RP) representative stating that contaminant sources are limited to lots owned by Bering LLC within the subdivided mobile home park, based on Shannon & Wilson’s October 2005 Phase II ESA and Release Investigation. The Phase II ESA identified petroleum hydrocarbon concentrations exceeding the applicable soil and groundwater cleanup criteria on Lots 6 and 8 of Block 6, along the northern boundary of West 30th Avenue. Target analytes in the soil and groundwater samples collected from borings and wells installed on other lots were either not detected or were at concentrations less than the cleanup criteria. The RP stated that the contaminated area is limited to Lots 5, 6, 7 & 8 of Block 6 owned by Bering, LLC (and not by Debenham Properties or Greenland, LLC; the latter owns the remaining lots which comprise South Park Estates trailer court). |
Eileen Olson |
| 5/8/2009 |
Document, Report, or Work plan Review - other |
Consultant Shannon & Wilson notified ADEC by telephone on May 8, 2009 that approximately 9 inches of free product was encountered in B6MW during a sampling event on May 7th. A follow-up email dated May 15th by the consultant documented the conversation, including the discovery of free product and plan to measure and recover product from the well on a weekly basis. |
Eileen Olson |
| 11/12/2009 |
Update or Other Action |
On 11/12/2009 ADEC received a groundwater monitoring letter report dated August 26, 2009. |
Eileen Olson |
| 1/28/2010 |
Document, Report, or Work plan Review - other |
ADEC letter dated 1/28/2010 reviews the "Groundwater Monitoring, 3007 Arctic Boulevard" report dated August 26, 2009 and received 11/12/2009. The report presents the results of May through August 2009 groundwater monitoring at Block 6 and Block 10, Lot 1 Northern Lights Subdivision. ADEC's letter requests a plan to resume groundwater monitoring, measurement and removal of free product (if present) from wells, with groundwater monitoring to begin by May 15, 2010. Sampling reported in the report was done on May 7, 2009. Free-phase product was present in Well B6MW and product recovery from the well was evaluated over an approximately 2 month period following the May sampling, with product thickness decreasing from approximately 7 inches to less than one inch during that period. Well B5MW was sampled on 5/7/2009 and contained 2.28 mg/L DRO exceeding the cleanup level of 1.5 mg/L. Well B5MW was sampled once previously at the time of installation on 5/24/2005 and exceeded cleanup levels for DRO. |
Eileen Olson |
| 8/24/2010 |
Document, Report, or Work plan Review - other |
ADEC's letter dated 8/24/2010 approved the plan for "Product Recovery and Groundwater Monitoring" also dated August 24, 2010 with the conditions that the responsible party report data regarding free product measurement and removal during the first of the two planned monitoring events to ADEC within two weeks of collection. |
Eileen Olson |
| 8/31/2010 |
Update or Other Action |
Consultant Shannon & Wilson reported in an email dated 8/31/2010 that 5 of the 8 exiting monitoring wells were located on the property and sampled on 8/27/2010. Monitoring Wells B9MW and B11MW could not be located, and Well B6MW contained 0.47 foot free-phase product. The free-phase product thickness was reduced to 0.02 foot in Well B6MW after bailing approximately 2.5 gallons of product/water mixture. Groundwater samples were collected from five wells (Wells B4MW, B5MW, B7MW, B8MW, and B10MW), which were located and did not contain product. Monitoring and recovering product from Well B6MW will be continued on a weekly basis.
|
Eileen Olson |
| 1/6/2012 |
Update or Other Action |
On 1/6/2012 ADEC received the "Groundwater Monitoring and Product Recovery, 3007 Arctic Boulevard, Anchorage" report dated December 20, 2011 by Shannon & Wilson. Bering LLC owns Block 6, Lots 5-8, and Greenland LLC owns Block 6, Lots 2,3,4,9,10 and 11 and Block 10, Lot 1. The report summarizes past environmental actions at the site and reports on two groundwater monitoring events, the first including wells B4MW, B5MW, B6MW, B7MW, B8MW and B10MW on August 27, 2010 and the second including wells B5MW and B8MW on May 26, 2011 as proposed in the approved work plan. The groundwater in B6MW was not sampled as it contained free product; however product monitoring and removal from the well were performed from August 27, 2010 through August 9, 2011 with the free product thickness measurable and diminishing over time during 18 monitoring events until the last event on August 9, 2011 when a sheen was present, but no measurable product. |
Eileen Olson |
| 7/2/2012 |
Update or Other Action |
ADEC received ML&P (Municipal Light & Power) documentation by email of screening and sampling 110 CY of stockpiled excess soil to be transported offsite for unrestricted use. Work was done in accordance with an approved Soil Management Plan that included contingencies in the event contamination was encountered. Contamination was not encountered during ML&P's work, nor were groundwater nor underground fuel pipelines encountered during the work, all completed between May and July 2012. Approximately 90 CY of the excess soil was excavated during construction of two underground concrete vaults on property adjacent to the site, to the northwest, to a depth of 9.5 feet. The additional approximately 20 CY of excess soil that was screened and sampled was removed from an approximately 45-foot-long utility trench excavated to a depth of 3.25 feet within the site. The areas excavated during the MLP work are shown on Figure 2 of the "Soil Management Plan for ML&P Substation 22 Construction Project, Anchorage, Alaska, Final, May 2012" prepared by SLR.
|
Eileen Olson |
| 5/22/2013 |
Meeting or Teleconference Held |
Staff met with owner and environmental consultant EMI to discuss next steps in completing site characterization. |
Eileen Olson |
| 3/15/2016 |
Document, Report, or Work plan Review - other |
ADEC letter dated 3/15/2016 requests additional site characterization. |
Eileen Olson |
| 7/19/2018 |
Document, Report, or Work plan Review - other |
On 6/26/2018 the work plan titled "Work Plan for a Buried Fuel Pipeline Removal, South Park Estates Mobile Home Park, Anchorage, Alaska; ADEC File No. 2100.38.454" was received from
Shannon & Wilson, Inc. The work plan proposed the work to remove a buried fuel pipeline and field screen the soil around the area of the pipeline. On 7/19/18 ADEC provided comments on the work plan and requested that a revised work plan be submitted by 8/10/18. |
Catherine Beatty |
| 7/25/2018 |
Update or Other Action |
ADEC provided a response to the work plan response to comments (RTC) received from the consultant. ADEC and the consultant are in general agreement on proposed updates to the work plan and an updated work plan will be submitted in the near future. |
Catherine Beatty |
| 7/30/2018 |
Document, Report, or Work plan Review - other |
ADEC approved the work plan titled “Revised Work Plan for a Buried Fuel Pipeline Removal, South Park Estates Mobile Home Park, Anchorage, Alaska; ADEC File No. 2100.38.454”. Work is tentatively scheduled to begin on August 8, 2018. |
Catherine Beatty |
| 9/4/2018 |
Brownfields Award |
Site awarded Targeted Brownfields Assessment by EPA. Field work expected to commence Summer 2019. |
Lisa Griswold |
| 2/21/2019 |
Meeting or Teleconference Held |
Meeting between MOA, EPA, ADEC and Landowner held on this date to discuss the scope of a Targeted Brownfields Assessment. The proposed work includes soil borings and temporary well point installation to sample the soil and groundwater in areas previously identified as impacted from a historic fuel line. The property is identified in MOA's 2040 Land Use Plan as being part of the Central Spenard Reinvestment Focus Area, and as such, is considered to be a within a priority redevelopment zone. |
Lisa Griswold |
| 3/12/2019 |
Document, Report, or Work plan Review - other |
ADEC provides comment of the report titled "Buried Fuel Pipeline Removal" dated 10/28/18. |
Kara Kusche |
| 3/12/2019 |
Update or Other Action |
Received clarification on comments via email from consultant. |
Kara Kusche |
| 3/13/2019 |
Site Characterization Report Approved |
ADEC approves the report titled "Buried Fuel Pipeline Removal" dated 10/28/18. This report documents the removal of 1,600 feet of buried pipelines as well as screening and sampling results. |
Kara Kusche |
| 9/2/2019 |
Update or Other Action |
ADEC received a Targeted Brownfields Assessment for the South Park Estates Mobile Home Park in Anchorage, Alaska, from the Environmental Protection Agency. CSP will review the assessment, and coordinate with Municipality of Anchorage and the RP. |
Randy Guintu |
| 2/27/2020 |
Document, Report, or Work plan Review - other |
The ADEC received a work plan to conduct additional site characterization activities. |
Randy Guintu |
| 3/3/2020 |
Document, Report, or Work plan Review - other |
The CSP reviewed a additional site characterization work plan, and submitted a comment letter via email to the RP. |
Randy Guintu |
| 3/6/2020 |
Site Characterization Workplan Approved |
The CSP received a response to comment letter, and revised work plan. With the information received, the work plan was approved. |
Randy Guintu |
| 5/22/2020 |
Document, Report, or Work plan Review - other |
Shannon & Wilson submitted an additional site characterization report. |
Randy Guintu |
| 9/1/2020 |
Site Characterization Report Approved |
The ADEC issued an approval letter for the Additional Site Characterization Report dated May 22, 2020. |
Randy Guintu |
| 6/28/2022 |
Update or Other Action |
ADEC sent the RP comments on the “Site Characterization and Corrective Action Plan, South Park Estates Mobile Home Park”, April 2022. ADEC requested an update work plan be submitted for review. |
Alena Voigt |
| 7/11/2022 |
Site Characterization Workplan Approved |
The ADEC approved Shannon & Wilson's Site Characterization and Corrective Action Work Plan on 07/08/2022. |
Alena Voigt |
