| Action Date |
Action |
Description |
DEC Staff |
| 4/10/1995 |
Site Added to Database |
|
Former Staff |
| 4/10/1995 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77623 ADD; |
Former Staff |
| 7/18/1995 |
Underground Storage Tank Site Characterization or Assessment |
SA1R; (2) 1,000-gal gasoline USTs removed 5/19/95. Analysis of soil samples were all below ADEC cleanup levels. Site located on same property as where RI planned. |
Former Staff |
| 7/20/1995 |
Release Investigation |
RELR; Mtg. held at request of RPCON. RPCON presents RI draft work plan for fuel station which sells gasoline & diesel for vehicles. Location of SBs, MWs and SVE piping discussed. All USTs have been retrofitted to meet '98 standards. Plan approved verbally. Final Plan submitted/approved DEC 8/1/95. |
Former Staff |
| 1/11/1996 |
Release Investigation |
SA2A; 11/95 Phase II submit. Test for soil/grd. water contam. under USTs. (9) SBs, (3) converted to MWs. Contam. localized to dispenser no. side area & atop silt layer 6' bgs. Benzene in grd water=5.9 ppb w/minor levels DRPH. Physical prop. soil/silty sand esp. when frozen make infiltra. releases minimal. |
Former Staff |
| 1/11/1996 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; 5/95 retrofit/upgrade USTs re-piping & CP. Wk. exposed USTs & piping. Soil contam. w/GRPH= 260-2,822 ppm & Benzene= 0.42-30.3 ppm. 285 cu. yds. contam. soil thermally treated. Array of 4"ID 0.01" slotted ABS piping installed in UST & dispenser areas for future remediation-vacuum/pressure connection to regen. blower. |
Former Staff |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: PETRO STAR FUEL INC |
Former Staff |
| 9/6/2002 |
Document, Report, or Work plan Review - other |
Release Investigation conducted in 2001 by installing wellpoints along west property boundary. MW-7 reported to contain 280 ppb benzene in April 2002, but was down to 10 ppb in July 2002. |
Janice Wiegers |
| 12/27/2002 |
Document, Report, or Work plan Review - other |
Conceptual Site Model submitted. Consultant recommends well search and evalution of soil around MW-7 to evaluate potential surface runoff effects. However, MW-7 is downgradient of former tanks south of station building. GRO remained in soil at 2,822 mg/kg following phase I - soil exposure pathways need to be assessed. |
Janice Wiegers |
| 4/30/2003 |
Update or Other Action |
Met with Walter Gore and Travis-Peterson, Inc. Discussed conceptual site model and additional work needed at this site for a NFRAP. TPI plans to submit NFRAP request during spring. Request will be evaluated at that time for completeness. |
Janice Wiegers |
| 5/12/2003 |
Document, Report, or Work plan Review - other |
Groundwater Sampling report submitted. MW-7 contained benzene at 487 ppb, an increase from previous results (April samples have had much higher results than September samples). |
Janice Wiegers |
| 10/21/2003 |
Document, Report, or Work plan Review - other |
Groundwater monitoring report submitted. Wells YG-1 and YG-2 were installed on downgradient property (Young's Gear). Well C-1 was also installed upgradient of MW-7. YG-1 contained benzene at 2000 ppb. YG-2, MW-7, and C-1 also contain benzene levels between 26 and 30 ppb. During a follow up discussion, the consultant indicated that a tracer test would be recommended to determine if the tanks were the source of the leak. |
Janice Wiegers |
| 10/31/2003 |
Document, Report, or Work plan Review - other |
Water well sampling report submitted. Drinking water samples were collected at 1711 and 3750 Bonita Street. Contaminants were not detected in either sample. |
Janice Wiegers |
| 3/31/2004 |
Document, Report, or Work plan Review - other |
Groundwater monitoring report submitted. MW-7 and YG1 contained benzene above cleanup levels; 746 and 266 ppb, respectively. Some wells were not sampled. Well maintenance is needed. |
Janice Wiegers |
| 10/1/2004 |
Document, Report, or Work plan Review - other |
ADEC received the Semi-Annual Groundwater Sampling for August 26, 2004 for the Sourdough Fuel Station. All the samples collected from the wells were analyzed for DRO, GRO and BTEX. The wells with contaminants that exceed ADEC Cleanup Levels are the following: MW-7 (0.0192 mg/L benzene), B-1 (1.67 mg/L DRO), YG-1 (1.58 mg/L DRO, 14.5 mg/L GRO, 2.3 mg/L benzene, 2.52 mg/L toluene), YG-2 (0.0585 mg/L benzene). |
Deborah Williams |
| 5/3/2005 |
Update or Other Action |
Update GIS, and review report . Topozone Pro Aerial Photos, NAD 83. |
Kim DeRuyter |
| 7/5/2005 |
Document, Report, or Work plan Review - other |
GW monitoring report received today. Boring 1 & 2, MW-6 remain below cleanup levels. MW-7 and YG1 & YG2 remain elevated. |
Kim DeRuyter |
| 1/27/2006 |
Update or Other Action |
PM met with consulting staff to discuss the site. The spring monitoring event will include sampling for VOCs to determine if lead scavengers and MTBE are contaminants of concern at this site. Continuous data loggers will be placed in 4 wells to better delineate ground water gradients in the area. |
Kim DeRuyter |
| 2/1/2006 |
Update or Other Action |
Received corrected groundwater monitoring data. Incorrect data tables were attached to the Oct 2005 report. Most notibale change is the MW-7 near the property boundary was ND for benzene. |
Kim DeRuyter |
| 3/6/2006 |
Update or Other Action |
Conceptual Site Model and summary of recent monitoring well data received. |
Kim DeRuyter |
| 3/21/2006 |
Update or Other Action |
Received e-mail sampling plan. New well points and dataloggers proposed in the December meeting have been removed from the 2006 workplan. Sent letter outlining requirements for site characterization. |
Kim DeRuyter |
| 5/24/2006 |
Document, Report, or Work plan Review - other |
Spring 2006 GW Monitoring Report received, no significant changes, except that lead was detected at 40 ug/L, above the 15 ug/L in MW-7. VOC samples from MW-7 and YG-2 were non-detect for all analytes. MW-7 was non-detect for PAH analytes. |
Kim DeRuyter |
| 6/1/2006 |
Site Visit |
Met with Petro Star Government Compliance and Safety Director, Lisa Lewis and TPECI staff to discuss delineation of contamination associated with MW-7. Petro Star believes this contamination is defusing from an off site source. |
Kim DeRuyter |
| 9/12/2006 |
Document, Report, or Work plan Review - other |
Received the August 15, 2006 groundwater monitoring report. Only MW C-1 was above the cleanup level for benzene at 6.28 ug/L. |
Kim DeRuyter |
| 10/13/2006 |
Document, Report, or Work plan Review - other |
GORE Sorb Soil Gas Monitoring report received. Soil gas concentrations are highest in the ditch along Van Horn near YG-2, and onsite near the service station tanks. However, not enough data points were collected to characterize on-site contamination. Moderately high concentrations were observed on the bulk fuel site as well, but again, not enough data points were collected to adequately characterize the site. |
Kim DeRuyter |
| 1/18/2007 |
Update or Other Action |
Sent letter rejecting the CC request and recommending continued semi annual monitoring. |
Kim DeRuyter |
| 2/5/2007 |
Update or Other Action |
ADOT is planning to work on the Van Horn and Lathrop intersection this year. They are awate of the contamination. Melody Debenham is the ADOT contact.
'melody_debenham@dot.state.ak.us' |
Kim DeRuyter |
| 2/8/2007 |
Long Term Monitoring Established |
The site management plan for the Van Horn Road Retail Fuel Station will include sample collection from monitor wells MW-6, MW-7, and C-1. Samples will be collected on a one time per year basis, and analyzed for DRO, GRO and BETX analytes. Wells B-1, B-2, and MW-1 should be properly decommissioned during the summer of 2007. A conditional closure status will be evaluated for this site when 3 consecutive sampling events indicate that groundwater in all perimeter wells has consistently met Table C cleanup levels. |
Kim DeRuyter |
| 2/13/2007 |
Exposure Tracking Model Ranking |
Baseline ranking completed based on current site conditions. |
Kim DeRuyter |
| 10/25/2007 |
Update or Other Action |
Received 2007 annual GW monitoring report. Nondetect in MW-6 &7, C-1 above MCL at 6.28-9.02 ug/L. |
Former Staff |
| 10/13/2008 |
Document, Report, or Work plan Review - other |
Received the 2008 Groundwater Monitoring Report from Travis/Peterson. DRO, BTEX, and GRO are below cleanup levels in monitoring wells MW6, MW7 and C1. ADEC will consider a cleanup complete action after 3 sampling events return results below cleanup levels. DEC requested lead analysis to be added to the next monitoring event since it was previously (2006) detected in MW7 above cleanup levels. DEC also requested an updated CSM. |
Tamara Cardona-Marek |
| 12/18/2008 |
Meeting or Teleconference Held |
ADEC discussed with Petro Star all Sourdough Fuel sites. The Former Fairbanks Fuel site is under annual long term monitoring. Wells MW6, MW7 and C-1 should be sampled again in 2009 and analyzed for lead. |
Tamara Cardona-Marek |
| 4/16/2009 |
Meeting or Teleconference Held |
ADEC met with Petro Star and TPECI after an in-depth file review of this facility. File review revealed data gaps and inconsitencies in the data that warrant additional site characterization .ADEC requested that a plan for additional investigation is submitted. Investigation should identify sources and delineate contaminant plume on and offsite. |
Tamara Cardona-Marek |
| 3/19/2010 |
Meeting or Teleconference Held |
DEC met with Petro Star and TPECI to discuss status of site. Depth of screens in long term monitoring wells has been verified with a camera.
The outstanding issues at this site include defining and investigating potential source areas such as tanks, piping, fueling islands and whether a preferential pathway exists along the north perimeter of the site. TPECI and DEC will work together to revise the site work plan and better define specific goals for this site and how they can be met with a cost effective sampling approach keeping in mind that the ultimate goal for this site is closure. ADEC mentioned using a geo-probe for quicker and cheaper sampling for both soil and groundwater as an investigative method rather than split spoon sampling and installation of monitoring wells. |
Tamara Cardona-Marek |
| 5/26/2010 |
Update or Other Action |
DEC requested that Petro Star sample for sulfolane one well within the source area to determine if sulfolane may be a COC. |
Tamara Cardona-Marek |
| 6/4/2010 |
Meeting or Teleconference Held |
DEC met with TPECI to discuss revisions to work plan. UST removal requirements must be separate from any additional characterization required by CS. Petro Star must comply with the requirements of a tank removal per UST Program. |
Tamara Cardona-Marek |
| 6/4/2010 |
Proposed Plan |
TPECI submitted a workplan for the removal of the tanks and additional assessment. |
Tamara Cardona-Marek |
| 10/6/2010 |
Document, Report, or Work plan Review - other |
DEC received and reviewed the 2010 UST Removal Site Characterization Report. DEC commented on the report and requested several revisions including a QA/QC narrative and the depth of where the sidewall samples were collected, among others. |
Tamara Cardona-Marek |
| 8/31/2011 |
Site Characterization Workplan Approved |
DEC received and reviewed the additional release investigation work plan for the site. This work plan will fill the remaining data gaps identified by the UST Program on the release investigation and tank removal from 2010. It will also fill-in the data gaps regarding source areas and preferential pathways identified by the Contaminated Sites Program. Work is scheduled to be completed in the Fall of 2011. |
Tamara Cardona-Marek |
| 9/20/2011 |
Site Visit |
Site visit prior to site work to confirm soil boring locations and changes due to piping and electrical lines. |
Tamara Cardona-Marek |
| 5/27/2014 |
Meeting or Teleconference Held |
DEC and Petro Star met to discuss several sites. This site is being managed with the adjacent site, (former) Tanana Petroleum, Inc. Bulk Fuel. DEC is awaiting product recovery data as well as a report on transducers installed at the site in 2012. Petro Star indicated that no product was recovered in 2014 due to there being minimal product present. The transducers should provide data that will allow an evaluation of seasonal shifts in groundwater gradients and elevation, providing a better understanding of groundwater at the site. Additional assessment needs will be determined following a report on the transducer data. |
Robert Burgess |
| 8/23/2016 |
Document, Report, or Work plan Review - other |
DEC issued a conditional approval of the Sampling and Analysis Plan submitted by Travis/Peterson and Petro Star. The work plan proposed to install and sample a single temporary well point in the location of the original release (former tank location). Approval conditions included sampling of all monitoring wells present at the site to compare downgradient concentrations, and proper waste handling and disposal. |
Robert Burgess |
| 4/28/2017 |
Document, Report, or Work plan Review - other |
DEC received the Site Characterization Groundwater Monitoring Report |
Robert Burgess |
| 5/8/2017 |
Meeting or Teleconference Held |
DEC met with Petro Star and Shannon & Wilson, Inc. to discuss ongoing progress and plans at several sites. |
Robert Burgess |
| 5/23/2018 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77623 USTs and dispenser island. |
Robert Burgess |
| 10/1/2018 |
Document, Report, or Work plan Review - other |
DEC received the Site History Review and 2018 Groundwater Monitoring Results report from Shannon & Wilson, Inc. The report documents activities at the site dating back to 1995, including multiple tank and system upgrades, replacements, and removals as well as associated release investigations, site characterization, and corrective action. The report also documents results of sampling remaining site monitoring wells in summer of 2018. |
Robert Burgess |
| 6/24/2019 |
Site Characterization Workplan Approved |
DEC approved the 2019 Site Characterization Work Plan submitted by Shannon & Wilson, Inc. The plan describes the installation of monitoring wells, temporary wells, and soil borings to better delineate the extent of contamination in soil and groundwater. |
Robert Burgess |
| 8/20/2019 |
Offsite Soil or Groundwater Disposal Approved |
DEC approved the disposal of approximately 40 gallons of purge water generated from temporary well point sampling activities. Water will be transported to the Petro Star refinery in North Pole and processed through the oil-water separator. |
Robert Burgess |
| 2/24/2020 |
Document, Report, or Work plan Review - other |
Shannon & Wilson submitted the 2019 Site Characterization report which documented site history, sampling of monitoring wells and a new soil boring in summer of 2019, and requested site closure based on an updated CSM and the most recent site characterization data. |
Robert Burgess |
| 4/14/2020 |
Site Characterization Report Approved |
DEC reviewed the 2019 Site Characterization report. This report combined with the site history background described in the referenced 2018 Site History Review and Groundwater Monitoring Results report provide a complete picture of the history of release investigation, site characterization, and corrective action that has occurred over the site's 26 year history. The report includes a request for site closure based on most recent data and an updated conceptual site model (CSM). |
Robert Burgess |
| 5/24/2021 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77623 USTs and dispenser island. |
Robert Burgess |
| 5/25/2021 |
Cleanup Complete Determination Issued |
The DEC issued a cleanup complete determination for the site following a closure request and justification that was included in the 2019 Site Characterization Report. The most recent analytical data shows that no unacceptable risk to human health or the environment remains at the site. See closure letter for details. |
Robert Burgess |
