| Action Date |
Action |
Description |
DEC Staff |
| 8/30/1993 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77870 GRO, BTEX, DRO contamination of soil and groundwater during gasoline/diesel UST removals. |
Former Staff |
| 8/30/1993 |
Site Added to Database |
|
Former Staff |
| 10/1/1993 |
Underground Storage Tank Site Characterization or Assessment |
UST Closure and Site Assessment Report recieved from Montgomery Watson. 4 UST's were removed, 3 contained leaded or unleaded gasoline, the 4th contained diesel. Sampling revealed significant contamination, extent not fully identified. Site is located along an impaired stream. |
Former Staff |
| 11/20/1993 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; 100 cubic yards of impacted soil was excavated and stored in a lined stockpile on-site. Additional contamination remains in the pit. : LCAU date changed DB conversion |
Former Staff |
| 5/4/1994 |
Leaking Underground Storage Tank Corrective Action Underway |
Letter issued to Montgomery Watson approving Corrective Action Workplan.. Copy of workplan not present in hard file 12/4/02. |
Bruce Wanstall |
| 7/7/1994 |
Update or Other Action |
Notice of Intent to Cost Recover sent to RP and copied to consultant. |
Former Staff |
| 7/7/1994 |
Document, Report, or Work plan Review - other |
CAP received from SBL.. Disapproval & comments letter requests that release investigation to characterize the contamination be completed prior to installation of remediation equipment. |
Former Staff |
| 11/25/1994 |
Document, Report, or Work plan Review - other |
SA and RI Report from SBL. Twenty four soil borings were advanced to collect 33 soil samples and 7 water samples from the 6 on-site groundwater monitoring wells for lab analysis. All water samples had GRO, 2 had DRO and an estimated 500 cubic yards of in situ soil are impacted by GRO up to 3000ppm and total BTEX up to 176ppm. |
Bruce Wanstall |
| 1/12/1995 |
Document, Report, or Work plan Review - other |
Letter accepts Release Investigation Report from SBL with no comment. Request for more study of CAP workplan that proposes in-situ air sparging of residual soil contamination and landspreading of stockpiled soils. |
Bruce Wanstall |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: HUGH N. GRANT |
Former Staff |
| 10/2/2001 |
Update or Other Action |
Changed Project Manager from Paul Horwath to Bill Janes |
Cynthia Pring-Ham |
| 3/6/2002 |
Update or Other Action |
Project Manager changed from Janes to Wanstall. Database updates and file tracked. |
Bruce Wanstall |
| 12/4/2002 |
Update or Other Action |
File review of site status, update database and RP contacts. Status of 100 cubic yards of impacted soil stockpiled on-site at UST closure is uncertain. |
Bruce Wanstall |
| 12/12/2002 |
Update or Other Action |
Facility inspection: cannot locate on-site soil stockpile, MW flush mounts uncertain. Manager agreed to have owner contact DEC |
Bruce Wanstall |
| 7/7/2003 |
Update or Other Action |
Made contact with facility manager who stated decision for further remedial action belongs to the owner. Manager had no knowledge of the fate of the soil stockpile. |
Bruce Wanstall |
| 7/28/2003 |
Update or Other Action |
Owner called to update staff on the status of the petroleum release event associated with closure of 4 USTs. He will contact a consultant to sample the monitioring wells on the property and assess status of the gas and diesel plumes. |
Bruce Wanstall |
| 5/19/2004 |
Site Visit |
Investigation into the fate of 100 cubic yards petroleum contaminated soil excavated during the removal of 4 USTs in 10/93. Site Assessment reports the soil was stored behind Grant's Plaza; UST excavation was lined and backfilled with clean soil. |
Bruce Wanstall |
| 9/14/2005 |
Site Visit |
Site inspection of the stream between the road and the retail gas station; no sheen observed or developed when sediments were disturbed. |
Bruce Wanstall |
| 9/16/2005 |
Update or Other Action |
Letter requesting additional site investigation and Corrective Action Plan sent to RP |
Bruce Wanstall |
| 2/7/2006 |
Update or Other Action |
jADEC letter requesting site investigation and monitoring of groundwater contamination was sent certified mail to the responsible party. |
Bruce Wanstall |
| 6/21/2006 |
Update or Other Action |
CDI 2006 and Bayliss 1994 data were compared to recommend to facility owner where the current release investigation focus should be. Sentinel wells along the property line to the south is needed since MW-21 was no longer productive. ADEC letter was prepared and sent to the facility owner. |
Bruce Wanstall |
| 6/21/2006 |
Document, Report, or Work plan Review - other |
Well Monitoring Sampling Report by Carson Dorn Inc from May 2006 found two productive wells; MW-4 sampled after 4 well volume purges had 33.8 ppm DRO. |
Bruce Wanstall |
| 6/22/2006 |
Leaking Underground Storage Tank Corrective Action Underway |
April 2006 GMR by CDI states that the 100 cubic yard volume of contaminated material excavated in 1994 was used as sub-base under pavement for Canyon Drive during the construction of the housing development at the end of Thunder Mountain Road; this is beneficial use action that requires an ADEC approved engineered plan. Correspondence with the Storage Tank Program concerning this workplan is not availble in the site records. |
Bruce Wanstall |
| 11/27/2006 |
Update or Other Action |
Review Groundwater Monitoring Report for Quality Control Standards. |
Bruce Wanstall |
| 5/7/2007 |
Update or Other Action |
Update GIS data using ArcMap & aerial photograph features. Scale 1:1,000 & accuracy to 25 meters. |
Bruce Wanstall |
| 6/25/2007 |
Update or Other Action |
A cost recovery bill for $3,385.17 was sent by DOL to the responsible party to recover ADEC cost of cleanup project management; no travel was needed to manage this case. |
Bruce Wanstall |
| 7/30/2007 |
Update or Other Action |
Sampling of the monitoring wells is overdue; ADEC requested that arrangements be made promptly. |
Bruce Wanstall |
| 7/31/2007 |
Exposure Tracking Model Ranking |
ETM ranking results are that ground water ingestion and subsurface soil are the controlling exposure pathways; cleanup remedy site controls include limiting access to ground water and an asphalt cap over the residual contaminated area. |
Bruce Wanstall |
| 8/31/2007 |
Document, Report, or Work plan Review - other |
Review of the laboratory data from the August 2007 GnG ground water monitoring email report and found discrepancies in the lab report case narrative for quality control variances in DRO and RRO soil analyses; data usability may not be affected. |
Bruce Wanstall |
| 9/12/2007 |
Document, Report, or Work plan Review - other |
Scan the April 2006 GMR into PDF format; update records and evaluate ground water monitoring data for a trend in contaminantion levels for seasonal variation. Data gap for spring 2007 was due to heavy snow preventing access to the monitoring wells. |
Bruce Wanstall |
| 9/25/2007 |
Document, Report, or Work plan Review - other |
Discussion held with environmental consultant concerning the sampling schedule and the process to reach a conditional site closure with a long term monitoring plan and a decision matrix for eventual site closure. |
Bruce Wanstall |
| 11/7/2007 |
Document, Report, or Work plan Review - other |
Review the TMB data from VOC analysis on monitoring well samples from the summer 2007. Draft long term monitoring plan framework will focus on the DRO plume; site manager agreed with discontinuing VOCs from the analyte list. |
Bruce Wanstall |
| 1/14/2008 |
Document, Report, or Work plan Review - other |
Monitoring wells two, three and eleven were sampled in late November 2007. Laboratory tests on the water meet ADEC quality assurance/control standards. |
Bruce Wanstall |
| 1/15/2008 |
Document, Report, or Work plan Review - other |
Sample data from 2006 and 2007 GMRs were compared for consistency and trend analysis. MW-1 or MW-2 was not sampled in the fall 2007 GMR. MW-3 data (above regulatory screening levels) and MW-11 data (trace level detections only) are consistent and indicate stability over the period. |
Bruce Wanstall |
| 5/9/2008 |
Update or Other Action |
ADEC requested that the responsible party submit a workplan for sequential well sampling to establish a concentration trend for regulatory site closure. The Work Plan has not been received and the ground water monitoring schedule is delayed and overdue in violation of 18 AAC 75.325. Historical list of data was sent to the operator by email with a renewed request for a work plan. |
Bruce Wanstall |
| 10/27/2008 |
Long Term Monitoring Established |
ADEC approves the long term ground water monitoring plan proposal for the regulated UST facility. Previously installed monitoring wells were evaluated resulting in one productive well, MW-11. Three additional monitoring wells were installed and each well was sampled for BTEX, GRO, DRO, and RRO in 2006 and 2007 and additional sampling is scheduled in 2008. |
Bruce Wanstall |
| 11/3/2008 |
Document, Report, or Work plan Review - other |
ADEC received the August 2008 Gas n Go GMR from consulting engineer; the data meet ADEC QA criteria. The GRO, DRO and BTEX data are below instrument detection or show stable or decreasing concentrations in three monitoring bordering the salmon stream east of the active facility. The fourth well had an increase in all petroleum fractions but is located furthest from the stream and near an active fuel transfer island. |
Bruce Wanstall |
| 10/23/2009 |
Document, Report, or Work plan Review - other |
DEC concurs with the conclusions in the CDI Report; compared with historical test sample data for the Gas N Go facility, the 2008 data have GRO, DRO and BTEX concentrations in monitoring wells MW-1, MW-2 and MW-11 as stable or decreasing. The same comparison for monitoring well MW-3, however shows an increase in most of the petroleum analytes. The spatial distribution of data indicates that residual soil and ground water contamination in the subsurface at MW-3 is not migrating in the direction the salmon stream east of the property. With this in mind, the DEC agrees with reducing the frequency of ground water monitoring to every three years. |
Bruce Wanstall |
| 8/9/2011 |
Document, Report, or Work plan Review - other |
DEC approved the May 2011 Groundwater Sampling at Gas N Go Fuel Station Report by Carson Dorn Inc. The data collection and field methods are consistent with DEC methodology in the approved Long-Term Monitoring Well Sampling Plan. The data meet DEC field and laboratory report quality assurance criteria in CS Program guidance documents and the UST Procedures Manual. DEC concurs with the conclusions in the Report that the trend in sample data for samples from monitoring wells MW-1, MW-2 and MW-11 has been either below instrument detection or stable to decreasing concentrations for the GRO, DRO and BTEX analytical parameters. The trend in sample data for monitoring well MW-3 shows a decrease in the GRO, DRO, benzene, toluene and total xylene concentrations from 2008, however ethylbenzene concentrations in the MW-3 sample went up in 2011 but the concentration is still less than one tenth of the 18 AAC 75.345 Table C cleanup level. |
Bruce Wanstall |
| 9/26/2012 |
Long Term Monitoring Established |
The next sampling event to monitor groundwater contamination at the active retail gas station is scheduled for 2014. Task tracker notification to the project manager is set up for June, 2014. |
Bruce Wanstall |
| 6/30/2014 |
Update or Other Action |
Consistent with a schedule in the DEC approved Long Term Monitoring Plan and Closure Determination with ICs agreement signed and submitted by DJG Development (Gas N Go), Carson Dorn Inc sampled the monitor wells and submitted to DEC electronic and hard copy of a Groundwater Monitoring Report. |
Bruce Wanstall |
| 7/23/2014 |
Site Visit |
DEC inspected the monitor wells and the site and confirms that conditions are as described in the sampling report by Carson Dorn Inc. |
Bruce Wanstall |
| 7/24/2014 |
Document, Report, or Work plan Review - other |
In accordance with requirements in 18 AAC 78.090 and 18 AAC 78.620, DEC approves the Report on monitoring groundwater contamination. The concentrations of DRO and benzene in the sample from monitor well MW-3 are above the groundwater cleanup levels. The concentrations of residual range hydrocarbons (RRO) and benzene in the field duplicate sample from monitor well MW-3 are above the groundwater cleanup levels. GRO, ethylbenzene and total xylenes were detected in the sample from well MW-3 at concentrations above the laboratory reporting limit and below cleanup levels. Benzene was detected in the sample from well MW-2 above the laboratory reporting limit and below cleanup levels. Analyte concentrations in samples MW-1 and MW-11 were all below the laboratory reporting limits and cleanup levels in 2011 and 2014. In accordance with the long-term monitoring plan for this site, one set of samples will be collected at the four wells on a three-year interval until cleanup standards have been consistently met at all wells. In the next sampling event, currently scheduled for June 2017, DEC requests that a field duplicate sample once again be collected from monitor well MW-3 and RRO be added as a contaminant of concern for well MW-3. If any of the wells are damaged between now and the 2017 sampling season, DEC requests that Gas N Go make arrangements to repair or replace the well prior to the scheduled sampling event so that none of the locations are lost and no interruption in the scheduled event occurs. |
Bruce Wanstall |
| 6/15/2015 |
Potentially Responsible Party/State Interest Letter |
draft PRP Notice letter and send certified return receipt requested mail to the facility manager at Gas N Go. |
Bruce Wanstall |
| 2/15/2017 |
Update or Other Action |
In accordance with the long-term monitoring plan for this site, one set of samples will be collected at the four wells on a three-year interval until cleanup standards have been consistently met at all wells. The next round of samples is scheduled to be collected in 2017. |
Bruce Wanstall |
| 12/15/2017 |
Update or Other Action |
Requested a work plan this date for the following items:
1. Gasoline range organics (GRO) in soil is present above the maximum allowable concentration.
2. The extent of groundwater contamination has not been delineated.
3. The presence of lead and polycyclic aromatic hydrocarbons (PAHs) in groundwater and soil is unknown.
|
Danielle Duncan |
| 8/13/2018 |
Site Characterization Report Approved |
Approved the 2018 Groundwater Sampling Report this date. The results found no contaminants above ADEC cleanup levels for all the wells except for MW-3. MW-3 had GRO, DRO, benzene, ethylbenzene, and xylenes above ADEC cleanup levels. |
Danielle Duncan |
| 3/21/2019 |
Site Characterization Workplan Approved |
Approved the Sampling and Analysis Plan (SAP) this date. Seven groundwater monitoring wells will be installed using a drill rig and Geoprobe 2 inch prepack wells. The soil and groundwater samples will be analyzed for gasoline range organics (GRO), diesel range organics (DRO), volatile organic compounds (VOCs), lead, and polycyclic aromatic hydrocarbons (PAHs). Note that to reduce cost, PAHs, lead, and VOCs may be analyzed on 10% of the soil and groundwater samples provided these are from the most highly contaminated samples. The borings and groundwater monitoring wells are going to be placed in the two areas having the highest levels of contamination and in locations for delineation purposes. |
Danielle Duncan |
| 6/4/2019 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77870 USTs. |
Danielle Duncan |
| 9/19/2019 |
Update or Other Action |
The consultant is waiting for the driller to be available to do the work likely this weekend or next - Denali Drilling. |
Danielle Duncan |
| 4/24/2020 |
Site Characterization Report Approved |
ADEC received and approved the “Site Investigation Report Gas N Go Fuel Station Juneau, Alaska” dated February 2020 and revised April 2020. The report summarized further characterization of subsurface soil and groundwater contamination. |
Rachael Petraeus |
| 6/30/2020 |
Document, Report, or Work plan Review - other |
On June 30, 3030 ADEC received a draft "Sampling and Analysis Plan (SAP) Gas N Go Fuel Station Juneau". The plan summarizes continued soil and groundwater sampling activities to delineate the extent of contamination impacts in soil and groundwater. |
Rachael Petraeus |
| 7/6/2020 |
Document, Report, or Work plan Review - other |
ADEC issues comments on the “Sampling and Analysis Plan (SAP) Gas N Go Fuel Station Juneau” dated June 2020. The work plan describes sampling of on-site soil and groundwater for known contaminants of concern (COCs) present in concentrations above ADEC cleanup levels. Soil COCs include GRO, DRO, 1-methylnaphthalene, 2-methylnaphthalene, naphthalene, 1,2,4-trimethylbenzene, ethylbenzene, and n-propylbenzene in soil. Groundwater COCs include GRO, DRO, 1-methylnaphthalene, 2-methylnaphthalene, naphthalene, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, benzene, ethylbenzene, and m-Xylene & p-Xylene. |
Rachael Petraeus |
| 7/13/2020 |
Site Characterization Workplan Approved |
On July 13, 2020 ADEC approved “Sampling and Analysis Plan (SAP) Gas N Go Fuel Station Juneau” dated June 2020. The work plan describes sampling of on-site soil and groundwater for known contaminants of concern (COCs) present in concentrations above ADEC cleanup levels. Soil COCs include GRO, DRO, 1-methylnaphthalene, 2-methylnaphthalene, naphthalene, 1,2,4-trimethylbenzene, ethylbenzene, and n-propylbenzene in soil. Groundwater COCs include GRO, DRO, 1-methylnaphthalene, 2-methylnaphthalene, naphthalene, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, benzene, ethylbenzene, and m-Xylene & p-Xylene. |
Rachael Petraeus |
| 9/27/2021 |
Document, Report, or Work plan Review - other |
Om September 27, 2021, ADEC received "Site Investigation Report Gas N Go Fuel Station Juneau" dated September 2021. The report summarizes soil and groundwater sample results that further delineated the extent of subsurface soil and groundwater contamination. Samples were analyzed for DRO, GRO, VOC and PAHs. |
Rachael Petraeus |
| 7/11/2022 |
Site Characterization Report Approved |
The ADEC approved the "Site Investigation Report", submitted Oct 2021. |
Flannery Ballard |
