Site Report: US Travel Systems, Former

Site Name:	US Travel Systems, Former
Address:	230 Old Steese Hwy, Fairbanks, AK 99701
File Number:	102.26.046
Hazard ID:	24310
Status:	Active
Staff:	Rebekah Reams, 9074512144 rebekah.reams@alaska.gov
Latitude:	64.848620
Longitude:	-147.703320
Horizontal Datum:

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

The site is a former Texaco station active from 1959 to 1983. Station facilities included five 4,000-gallon underground storage tanks (USTs); one 500-gallon used oil UST, two dispenser islands, product piping, and a station building. The USTs, piping and dispenser islands were removed without documentation or sampling and the excavation was reportedly backfilled with clean gravel. Site characterization and cleanup activities have included advancement of soil borings and installation of monitoring wells, groundwater monitoring, soil vapor assessments, and the installation and operation of an air sparge & soil vapor extraction system.

Action Information

Action Date	Action	Description	DEC Staff
2/7/1992	Site Added to Database		Former Staff
2/7/1992	Leaking Underground Storage Tank Release Confirmed - Petroleum	LUST Site created in CSP for source area ID 77735 ADD;	Former Staff
2/12/1992	Underground Storage Tank Site Characterization or Assessment	SA1R;	Former Staff
2/28/1992	Update or Other Action	RPS;	Former Staff
3/17/1992	Update or Other Action	TECH; Spoke about site to lawyer for PRP.	Former Staff
3/19/1992	Update or Other Action	TECH; Met w/property owner of USTravel Systems site. Explained/helped fillout UST Cleanup Grant Application package.	Former Staff
3/24/1992	Update or Other Action	NOR; Letter sent to validate release. Requested release investigation & cleanup.	Former Staff
8/3/1992	Update or Other Action	CORR; Thomas responded to attorney letter. Re: PRP liability.	Former Staff
8/28/1992	Update or Other Action	UPD; Hung reviewed.	Former Staff
10/14/1992	Update or Other Action	MEET; Thomas - met with property owner to discuss release investigation strategy.	Former Staff
10/26/1992	Update or Other Action	CORR; Thomas - Summarized outline of release investigation requirements.	Former Staff
11/19/1992	Underground Storage Tank Site Characterization or Assessment	SA1; Thomas - Received and reviewed draft proposal for SA/RI; approved w/4 conditions; requested revised draft, site is funded under UST FAP program.	Former Staff
11/19/1992	Underground Storage Tank Site Characterization or Assessment	SA1R; Thomas - Reviewed and conditionally approved draft proposal.	Former Staff
2/16/1993	Update or Other Action	MEET; THomas: met with J. Feist and S&W , reviewed and verbally approved modified work plan. Fianl version will be submitted next week.	Former Staff
3/15/1993	Update or Other Action	CORR; Thomas gave final approval of modified release investigation plan.	Former Staff
3/22/1993	Underground Storage Tank Site Characterization or Assessment	SA1; Thomas: S&W completed release investigation which included 7 borings, 4 of which were converted into MW's. Free product found in all wells ranging from sheen to 3.75" in DOT-MW. No waste oil constituents noted. Soils contaminated at varying levels in borings. Contamination more widespread than suspected. Hydraulic link to MAPCO unknown.	Former Staff
5/6/1993	Release Investigation	RELR; Thomas reviewed and approved release investigation. Suggested completing GW elevations & analyses and begin developing corrective action strategy to include plume delineation, tank removal, product recovery (where feasable). Will await to receive summary of GW data and list of treatment alternatives.	Former Staff
5/26/1993	Update or Other Action	MEET; Thomas met with Fiest/Davidson and S&W to discuss summary of Release investigation. ADEC suggested continuing collecting data on GW and begin a draft corrective action proposal. Final RI report will be submitted w/recommendation for cleanup. Talked with FAP people as well, to coordinate next year's funding request.	Former Staff
8/24/1993	Update or Other Action	MEET; Thomas met with US Travel to discuss S&W's Corrective Action plan, schedule and cost. Thomas will offer full tech review and comment shortly. Conceptually, plan looks good.	Former Staff
8/24/1993	Leaking Underground Storage Tank Corrective Action Underway	CAPR; Thomas reviewed and conditionally approved CAP for site. Plan calls for 3 additional MWs, and an air sarg/VES treatment system in situ. Plan also includes removal of 1-3 suspected in-place USTs. Tanks to be removed Fall '93, VES to be designed winter 93-94 and pilot and fianl snatem tested and installed spring '94.	Former Staff
9/10/1993	Leaking Underground Storage Tank Corrective Action Underway	LCAR; Thomas reviewed and approved revised corrective action plan for ground water remediation. Modifications to original plan included manual free product recovery, a contingency for haz wastes removed from waste oil tank, tank decommissioning notice, a pilot test for the AS/VES system, and excluded a well search. Thomas approved work elements and schedule. Forwarded plan to UST FAP for fiscal approval.	Former Staff
1/14/1994	Update or Other Action	RPL2; Peterson sent PRP-CS Database Notification Letter to RP requesting update and more environmental information. RP responded with completed information form.	Former Staff
6/6/1994	Update or Other Action	CORR; Wingerter sent letter informing RP of their financial liability under new ADEC cost recovery policy. State is authorized, under Section 9003(h) of the Resource Conservation and Recovery Act to take action on this LUST facility.	Former Staff
8/1/1994	Leaking Underground Storage Tank Cleanup Initiated - Petroleum	LCAU; Abandonned waste oil tank removed. AS/SVE system designed and installed. System should be on line by 2/95 to treat contaminated soil, ground water and free product.	Former Staff
8/24/1994	Underground Storage Tank Site Characterization or Assessment	SA1R; Thomas reviewed SA for 500 gallon used oil tank. Approx. 6 yards of contaminated soils removed and stockpiled. Exploratory trench dug as well to try and locate another suspected UST. Not found. 15 yards of soil from trench were stockpiled. All soils were brought to OIT for incineration. Soils beneath tank below cleanup levels; waste oil tank closed. Cleanup will continue on the rest of the property under the FAP grant.	Former Staff
9/16/1994	Leaking Underground Storage Tank Corrective Action Underway	CAPR; Thomas reviewed CAP for AS/SVE. Made a number of design comments that were addressed in phone conference with Shannon & Wilson. Only outstanding issue is VOC emmissions. Plan conditionally approved. System should be installed soon.	Former Staff
9/27/1994	Update or Other Action	CORR; Thomas sent correspondence to Alaska Environmental Specialists, stating that the Site Assessment information as provided is not adequate. Requested full SA/Tank closure/CAP within 30 days. Also spoke with AES that day and asked them to coordinate soil treatment with Kenai district. Plan as approved by ADEC not followed and therefore not approved.	Former Staff
10/3/1994	Update or Other Action	CORR; Thomas sent final approval letter for CAP. Contingency stated that of VOC emmissions exceeded, ADEC will ask for immediate correction.	Former Staff
1/13/1995	Update or Other Action	UPD; SITE SUMMARY: AS/SVE system by S&W about to go on line. Site has GW (product) in all corners of property. System should be operational shortly, afterwards, ADEC should receive quarterly ground water sample results. Watch for plume co-mingling from adjacent MAPCO station.	Former Staff
1/17/1996	Leaking Underground Storage Tank Corrective Action Underway	CAPR; Reviewed on-going CAP of SVE/Air Sparging & FA. Consulted w/RPCON on costs reduction. Decided to change schedule fr. quarterly to every 6 mos. for grd. water sampling effective 6/96. Wrote ltr. to RP/RPCON re-decision.	Former Staff
4/4/1997	Long Term Monitoring Established	Approved RPCON's 12/12/96 work plan for FAP. Unable to reduce lab costs due to reg requirement.	Former Staff
11/20/1997	Update or Other Action	ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: US TRAVEL SYSTEMS - DAVIDSON INC	Former Staff
12/1/1997	Long Term Monitoring Established	Approved '98 wk pl for FAP. Modification of MW 1 (VEW1b) since grd water changed direction to more westerly than NW. DOT road widening Proj. spring '98 will jeopardize half of MW1 w/proposed VEW1b. Also affect AIW-3, MW5, AIW-5 & MW2.	Former Staff
10/14/1998	Long Term Monitoring Established	Reviewed FY '99 wk pl for FAP. Approved except for some reductions in sampling schedule. MWs 4, 5 & 6 once/yr as Benzene high, MWs 1, 2 & 3 twice/yr as MW1 new air sparge/SV wells installed, MW 4 analyze w/602/601/624 (MW 2 & 3 show nothing) & discharge air sampling 2 quarters instead of 4. Road proj. not started.	Former Staff
1/31/2001	Update or Other Action	Groundwater monitoring report submitted. Event was scheduled for July 2000 but was postponed due to dewatering in the Old Steese Highway. Samples were collected from MW-2 and MW-3 on November 17. The rest of the samples were collected on December 1 following construction of the sewer line in the Old Steese. Seven wells contained benzene above cleanup levels; the maximum concentration was 1,010 ppb (in MW-3). EDB was detected in MW-4.	Janice Wiegers
1/23/2002	Document, Report, or Work plan Review - other	Summary report submitted under Grant 15274231. Conceptual Site Model included in report. On-site indoor air and excavation/trench workers identified as primary receptors.	Janice Wiegers
1/24/2002	Update or Other Action	Groundwater monitoring and well point installation report submitted. Groundwater samples and two slough samples were collected on July 30. Eight well points were installed on Santina's Flowers and Burger King properties and sampled on September 6 and 7. Benzene exceeded cleanup levels in MW-4 and MW-7 with a maximum concentration of 26.1 ppb in MW-4. Benzene exceeded cleanup levels in all well points except WP-1, with a maximum concentration of 520 ppb in WP-7. PCE exceeded cleanup levels in WP-6, but was attributed to a separate source. Slough water samples were collected in two places - no contaminants detected.	Janice Wiegers
4/5/2002	Update or Other Action	Groundwater monitoring report submitted. Samples collected on February 22. Benzene exceeded cleanup levels in MW-3 and MW-6, with a maximum concentration of 1,700 ppb. In general, samples collected without purging. A sample collected at MW-3 with purging contained approximately 2x the benzene concentration as the no-purge sample. Slough contained 1.5 feet of ice and was not sampled.	Janice Wiegers
1/17/2003	Update or Other Action	Groundwater monitoring and slough sampling report submitted. Samples collected August 19 and 20. Maximum benzene concentration (280 ppb) in new off-site well MW-9. Maximum GRO (3.4 ppm) in MW-4. Solvents detected below cleanup levels in MW-9. Geochemical analysis of the groundwater suggests not enough oxidants present to biodegrade observed GRO concentrations.	Janice Wiegers
1/23/2003	Update or Other Action	Release investigation and CSM report submitted. MW-9 and MW-10 were installed. The system continues to remove VOCs, but appears to hve reached limits of effectiveness. However, benzene levels have fluctuated up to 1,700 ppb during recent groundwater sampling.	Janice Wiegers
5/20/2003	Document, Report, or Work plan Review - other	System performance report submitted. Evaluated system performance and conclude that GRO and benzene are dissolving into the groundwater from outside the radius of influence of the treatment wells. Cost of additional treatment wells may not be cost-effective. Enhanced bioremediation approach is planned for this site as a polishing step.	Janice Wiegers
10/27/2003	Update or Other Action	Bioremediation treatability study report submitted. No significant effects were found during bench-scale testing for adding nitrogen amendments. Nitrogen amendments not recommended.	Janice Wiegers
11/24/2003	Update or Other Action	Semiannual groundwater monitoring report submitted.	Janice Wiegers
1/14/2004	Update or Other Action	ChevronTexaco responds to PRP letter accepting responsibility for the contamination. Chevron will submit a plan to further evaluate the extent of impacted groundwater and to enhance the remediation system by the second quarter of 2005.	Janice Wiegers
3/5/2004	Document, Report, or Work plan Review - other	ADEC approves workplan for Indoor Air Quality assessment of the office building at 230 Old Steese.	Janice Wiegers
4/7/2004	Update or Other Action	Indoor air quality assessment plan submitted. Use of commercial exposure parameters proposed. DEC approves with use of more stringent parameters.	Janice Wiegers
6/14/2004	Update or Other Action	Indoor air quality assessment submitted. A limited ventilation and airflow evaluation was completed. Two indoor air and one outdoor air samples were collected in April and again in May. BTEX levels were below the DEC acceptable risk level but above the level typically used to indicate monitoring is needed. There was indication that contaminants could be from outdoor air.	Janice Wiegers
6/14/2004	Update or Other Action	Summary report for indoor air assessment submitted. Summarized indoor air data for all constituents tested.	Janice Wiegers
6/14/2004	Update or Other Action	Request for NFRAP submitted.	Janice Wiegers
6/14/2004	Document, Report, or Work plan Review - other	Report describing injection of oxygen releasing compound submitted. ORC was injected into 15 soil boring at 17 feet bgs in the former tank and dispenser island locations. Borings were space approximately 10 feet apart. ORC was also injected into sparge wells AIW-4, AIW-5, AIW-6, AIW-7, and AIW-8. Repairs to the sparge wells will be needed if the system is restarted.	Janice Wiegers
10/14/2004	Update or Other Action	PRP letter sent to ChevronTexaco following a meeting with the current landowners. Texaco was identified as the owners and operators of the USTs that resulted in the release. According to Mr. Davidson, he never operated the gas station and removed the USTs after buying the property.	Janice Wiegers
8/15/2005	Update or Other Action	Oasis submits groundwater monitoring report on behalf of ChevronTexaco. Tested for GRO and VOCs. EDB also tested with Method 504 in MW-4 and MW-8. MW-1, MW-2, MW-3, MW-4, MW-6, and MW-7 contained contaminant levels above the MCL. EDB was observed above the cleanup levels in MW-4 and MW-6. 1,2-DCA exceeded cleanup levels in MW-4. Based on previous discussions with Secor, ChevronTexaco plans to conduct several monitoring events to evaluate the groundwater quality after the system was shutdown before deciding what further action to take.	Janice Wiegers
12/19/2005	Document, Report, or Work plan Review - other	Oasis submits groundwater monitoring report for October sampling. Wells were resurveyed - groundwater flow direction was similar to historical directions. However, gradient may steepen near the slough. Contaminants were found in all nine wells sampled with the highest concentations in MW-4 and MW-6. VOCs and EDB (method 8011) were tested in select wells. EDB was the only analyte found above groundwater cleanup levels (in MW-4).	Janice Wiegers
6/29/2006	Update or Other Action	Dave Mongold is a prospective purchaser of the property and has hired an attorney, James DeWitt to inquire about liability issues with purchasing the property.	Deborah Williams
8/8/2006	Update or Other Action	ADEC received BBL's First Semi-Annual 2006 Groundwater Monitoring Report. GRO levels were detected in eight of the nine samples with concentrations ranging from 25 ug/L (MW-8) to 32,000 ug/L (MW-2 and MW-6). Benzene was detected in eight of the nine samples at concentrations ranging from 5.7 ug/L (MW-7) to 2,300 ug/L (MW-4). EDB was analyzed for in MW-1, MW-2, MW-3, MW-4, and MW-8. EDB was detected in samples above ADEC cleanup levels from MW-4 at 0.18 ug/L. Groundwater from MW-2 and MW-3 were analyzed for eight RCRA metals. Arsenic and lead was found above ADEC cleanup levels in both wells.	Deborah Williams
12/4/2006	Document, Report, or Work plan Review - other	ADEC reviewed the Second Semi-Annual 2006 Groundwater Monitoring Report for the US Travel site. GRO levels ranged from non-detect to 19,000 ppb, DRO ranged from 47 ppb to 5,000 ppb, and bezene ranged from 1 ppb to 1,600 ppb. MW-2 and MW-3 were sampled and analyzed for VOCs, metals, EDB and PAHs and they all met ADEC cleanup levels.	Deborah Williams
12/28/2006	Document, Report, or Work plan Review - other	ADEC received BBL's report entitled Additional Soil Characterization Report for the Former Texaco 21-1083 LUST site located at 230 Old Steese Highway. A Ground Penetrating Radar and Electromagnetic Survey was completed at the site. Also, 16 membrane interface probe (MIP) borings were completed and advanced to depths of up to 21-feet bgs. The MIP cross-sections showed that generally the VOCs are located in the smear zone from approximately 10-ft to 15-ft bgs or are associated with the impacted groundwater. MIP-16 which was located in the former north dispenser island had VOCs detected at depths as shallow as 8.5-feet bgs. Three confirmational borings were completed and co-located with a MIP boring. Confirmational soil samples were collected from the borings at 5-feet intervals. The laboratory analytical data confirm the MIP data. BBL concluded that the additional soil delineation showed hydrocarbon impact in the smear zone with the exception of the former north dispenser island area. They recommend that Anomaly A be further investigated to determine whether a UST is present or the anomaly was caused by impacted soil.	Deborah Williams
3/13/2007	Exposure Tracking Model Ranking	Initial ranking completed.	Deborah Williams
6/6/2007	Leaking Underground Storage Tank Corrective Action Underway	ADEC received and approved the ARCADIS BBLES Remediation Workplan, Former Chevron 211083, Fairbanks, Alaska dated May 17, 2007. Remediation workplan includes installation of 11 soil borings to be used as air sparge wells and 7 soil borings to be used as soil vapor extraction wells.	Tamara Cardona-Marek
6/8/2007	Update or Other Action	ADEC received ARCADIS BBLES First Semi-annual 2007 Groundwater Monitoring Report for the Former Chevron Facility 211083 site. According to the report, the analytical results of the March 2007 groundwater sampling event are consistent with previous events. During the monitoring event, concentrations of GRO, DRO, benzene, toluene, ethylbenzene, arsenic and lead were greater than the applicable ADEC groundwater cleanup levels in at least one groundwater sample.	Deborah Williams
12/10/2007	Update or Other Action	ADEC received ARCADIS BBLES First Semi-annual 2007 Groundwater Monitoring Report for the Former Chevron Facility 211083 site. According to the report, the analytical results of the March 2007 groundwater sampling event are consistent with previous events. During the monitoring event, concentrations of GRO, DRO, benzene, toluene, ethylbenzene, and EDB were greater than the applicable ADEC groundwater cleanup levels in at least one groundwater sample. EDB was detected in wells MW-4 and MW-6. Lead and arsenic did not exceed cleanup levels. ARCADIS recommends eliminating EDB sampling from wells MW1, MW2, MW3, MW7, MW8, MW9, and MW10. DEC approves eliminating EDB sampling from wells MW-1, MW-2, MW-7, MW-8 and MW-10.	Tamara Cardona-Marek
2/5/2008	Update or Other Action	DEC received the ARCADIS Remediation System Installation Report.	Tamara Cardona-Marek
6/25/2008	Update or Other Action	ADEC received the First Semi Annual 2008 Groundwater Monitoring Report for the former US Travel Site. Results are consistent with previous monitoring events. DRO, GRO, BTEX, EDB and lead exceeded the applicable GCL in at least two monitoring wells. New AS/SVE system was installed and began operating shortly after this monitoring event (4/9/2008).	Tamara Cardona-Marek
12/24/2008	Update or Other Action	ADEC received the 2008 Second Semi-Annual groundwater Monitoring Report for the US Travel site. DRO, GRO and BTEX has decreased from previous sampling event in wells MW-1, MW-4 and MW-6. Well MW-3 could not be sampled. Contaminants in well MW-5 maintained concentrations similar to previous sampling events. AS/SVE system has been working since April 2008.	Tamara Cardona-Marek
3/13/2009	Meeting or Teleconference Held	ADEC dicussed with Chevron and Arcadis the status of the site. AS/SVE system will continue to operate on the site. Arcadis will submit graphs and plume maps to show progress over time as part of the current year's tasks.	Tamara Cardona-Marek
6/8/2009	Update or Other Action	DEC received the First Quarter 2009 Remediation System Operation and Maintenance Report for the US Travel Site. System was operational for ablmost 100% of the planned operational period. No benzene detected in the air effluent samples. 39 pounds of GRO were removed during this reporting period.	Tamara Cardona-Marek
6/9/2009	Update or Other Action	DEC received sample results from purge water and request for approval to transport through Emerald to Anchorage for disposal. DEC granted approval.	Tamara Cardona-Marek
6/30/2009	Offsite Soil or Groundwater Disposal Approved	Approval granted for disposal of 6 55 gal drums of soil originating from site. No contaminants above cleanup levels detected in composite samples.	Tamara Cardona-Marek
12/3/2009	Document, Report, or Work plan Review - other	DEC received and reviewed the First Semi-Annual 2009 groundwater monitoring report. Contaminant concentrations are consistent with previous monitoring events. MNA parameters were measured, however AS/SVE system is currently running. Arcadis recommended that monthly gauging is suspended. DEC agreed with the recommendation but requested that a graph and information documenting the trends observed is submitted. Chevron has changed consultants from Arcadis to CRA, therefore future reports and monitoring events will be done by CRA.	Tamara Cardona-Marek
12/4/2009	Document, Report, or Work plan Review - other	DEC received the second quarter operations and maintenance report for 2009 for the AS/SVE system. Approximately 165 pounds of GRO were removed from the subsurface during this reporting period.	Tamara Cardona-Marek
3/12/2010	Meeting or Teleconference Held	DEC met with Chevron and CRA to discuss actions for 2010. CRA proposes to conduct a rebound study and continue semi annual sampling to evaluate its effects. System will be restarted if conditions significantly rebound.	Tamara Cardona-Marek
2/10/2011	Document, Report, or Work plan Review - other	DEC received and reviewed the two Semiannual 2010 Groundwater Monitoring Reports for this facility.	Tamara Cardona-Marek
2/15/2011	Update or Other Action	CRA submitted responses to DEC comments on the 2010 Groundwater Monitoring Reports.	Tamara Cardona-Marek
2/24/2011	Meeting or Teleconference Held	DEC met with Chevron to discuss the proposed 2011 site activities. Semi annualgroundwater monitoring will continue . Possible rebound of contaminants will be evaluated. Conceptual site model will be updated.	Tamara Cardona-Marek
8/2/2011	Site Visit	Site visit with consultant and DEC intern to see remediation system.	Tamara Cardona-Marek
8/2/2011	Meeting or Teleconference Held	DEC met with Chevron and CRA to discuss status of site. Remediation system has been shutdown for rebound testing.	Tamara Cardona-Marek
8/5/2011	Document, Report, or Work plan Review - other	DEC received from CRA and reviewed the 2009 and 2010 Operations and Maintenance and Groundwater Monitoring Reports. Contaminant concentrations in groundwater have decreased, results of rebound test are pending.	Tamara Cardona-Marek
8/8/2011	Document, Report, or Work plan Review - other	DEC received from CRA and reviewed the First and Second Semi Annual 2010 Groundwater Monitoring Report.	Tamara Cardona-Marek
12/29/2011	Document, Report, or Work plan Review - other	DEC received the First and Second Semi Annual 2011 Groundwater Monitoring and Sampling Report for the former US Travel site. GRO exceeded the groundwater cleanup levels in wells MW-3 and MW-5 in both events and in MW-2 in one of the monitoring events; benzene exceeded cleanup levels in wells MW-1, MW-3 through MW-6, and in MW-9; DRO was exceeded in wells MW-3 through MW-6.	Tamara Cardona-Marek
12/31/2012	Document, Report, or Work plan Review - other	DEC received the Revised First semi-annual and the Second Semi-annual 2012 groundwater monitoring and sampling reports from CRA. Benzene, DRO, and GRO remain above groundwater cleanup levels in MW-2, MW-3, MW-4, MW-5, and MW-6. MW-1 and MW-9 had benzene above cleanup levels in June, but not in August. The air sparge/soil vapor extraction remediation system could not be restarted due to electrical issues and is currently under repair.	Robert Burgess
2/27/2013	Meeting or Teleconference Held	DEC met with Chevron and consultants. Discussed problems hindering the start-up of the remedial system on site. Electrical and program logic issues are holding up the re-start. CRA plans to continue to work on the system and hopes to either repair or begin to replace it by spring of 2013.	Robert Burgess
9/17/2013	Document, Report, or Work plan Review - other	DEC received the First Semi-Annual 2013 Groundwater Monitoring and Sampling Report. The remedial system was re-started in March 2013. The system has decreased concentrations in several wells compared to the most recent sampling events, however contaminants remain above cleanup levels in source area wells MW-1, MW-4, and MW-5, and in MW-9. The system will run for at least one year before evaluating rebound.	Robert Burgess
12/3/2013	Document, Report, or Work plan Review - other	DEC received the Second Semi-Annual 2013 Groundwater Monitoring and Sampling Report. Contaminant concentrations have decreased to levels below cleanup in all wells except MW-4, which contained DRO at 1.7 mg/L. Natural attenuation paramaters were measured despite the AS/SVE system operating. Air sparging has shifted conditions from highly reduced to more oxidizing.	Robert Burgess
1/27/2014	Document, Report, or Work plan Review - other	DEC reviewed and commented on the 1st semiannual 2013 remediation system operations and maintenance report. The system was restarted in March of 2013 and will run for at least one year before re-evaluating rebound.	Robert Burgess
2/26/2014	Meeting or Teleconference Held	DEC met with Chevron and their consultants for a project update and planning session. The effectiveness of the remedial system is declining and Chevron has requested removal of the system by July 1, 2014. Previous rebound tests showed minimal rebound; DEC agreed to review the data and respond to the request as soon as possible. A vapor intrusion assessment for the on-property building will be conducted after the system is shut down, since it will no longer be mitigating soil vapor. MNA sampling was discussed, and it was agreed that more data is needed before drawing conclusions about MNA at the site. The sampling schedule will be adjusted to allow for sampling during winter, when the aquifer is in a steady state.	Robert Burgess
4/10/2014	Update or Other Action	DEC approved the removal of the remedial system at the site with the condition that the vapor intrusion pathway be evaluated when the system is shut off, and that mitigation of this pathway is implemented if vapor intrusion is a risk.	Robert Burgess
4/15/2014	Update or Other Action	DEC received notice that the remedial system would be shut down this week in order to allow adequate time for equilibration before the soil vapor/vapor intrusion investigation.	Robert Burgess
5/8/2014	Site Visit	DEC project manager visited the site to observe groundwater sampling.	Robert Burgess
5/9/2014	Site Visit	DEC project manager visited the site to observe boring hole clearance for soil vapor probe installation as well as soil sampling from the base of the boreholes.	Robert Burgess
5/21/2014	Document, Report, or Work plan Review - other	DEC provided comments on the Soil Vapor Assessment Workplan.	Robert Burgess
5/28/2014	Document, Report, or Work plan Review - other	DEC approved the Soil Vapor Assessment workplan following comment resolution and revision. Three soil vapor probes will be installed near the slab-on-grade building to a depth of 8 feet to evaluate the presence of soil gas and likelihood of vapor intrusion.	Robert Burgess
6/2/2014	Site Visit	DEC staff Burgess and Wiegers visited the site to answer questions related to soil vapor sampling and to observe sampling of soil vapor probes.	Robert Burgess
6/16/2014	Document, Report, or Work plan Review - other	DEC project manager approved the Remedial System Decommissioning workplan.	Robert Burgess
2/24/2015	Meeting or Teleconference Held	ADEC project manager met with Chevron and CRA after providing comments to several reports, including the First and Second Semi-Annual Groundwater Monitoring Reports, the Remedial System Decommissioning Report, the Soil Vapor Assessment Report, and an updated conceptual site model. Revised reports will be submitted or comments will be incorporated into reports that include the second round of vapor sampling. Currently all of the equipment from the remedial system has been removed from the site and there is no evidence of rebound. Planned work is to analyze data from the second vapor sampling event, decommission vapor probes if below target levels, and continue semi-annual monitoring of groundwater.	Robert Burgess
3/9/2015	Document, Report, or Work plan Review - other	ADEC reviewed the revised First and Second Semiannual groundwater monitoring reports. Concentrations of hydrocarbons in groundwater remain stable following shutdown of the remedial system. Samples from source area wells continue to be slightly above cleanup levels; monitored natural attenuation will be employed at the site to ensure that concentrations continue to decrease through biodegradation.	Robert Burgess
5/13/2015	Document, Report, or Work plan Review - other	DEC approved the Soil Vapor Probe Decommissioning workplan and the Revised Groundwater Sampling Workplan.	Robert Burgess
2/11/2016	Document, Report, or Work plan Review - other	ADEC reviewed the August 2015 Soil Vapor Probe Decommissioning Report. Work conducted by GHD followed the approved work plan and field notes indicated the work included repairs to a decommissioned system well cement plug that had been damaged by a snow plow. Three soil vapor probes were decommissioned on May 28, 2015. Tubing was removed and bentonite was used to fill the boring. Gravel and asphalt were added to bring the fill up to grade. Decommissioning photos were requested.	Shawn Tisdell
2/11/2016	Document, Report, or Work plan Review - other	The December 31, 2015 Revised Conceptual Site Model was reviewed. ADEC indicated Noyes Slough must be considered a complete pathway for surface water ingestion, not incomplete as written in the report, as it can potentially be a source of drinking water, even though the water quality is poor.	Shawn Tisdell
2/12/2016	Document, Report, or Work plan Review - other	Decommissioning photos of soil vapor extraction wells received by DEC.	Shawn Tisdell
2/24/2016	Meeting or Teleconference Held	Teleconference meeting between ADEC and Chevron consultants from GHD. Reviewed completed work described in previous action comments. In 2016 GHD will continued semiannual groundwater monitoring and report submission.	Shawn Tisdell
3/4/2016	Document, Report, or Work plan Review - other	DEC has reviewed the Second Semi-Annual 2015 Groundwater Monitoring Report from GHD Services Inc. Past remediation at the site has significantly reduced groundwater contamination. However, groundwater contamination measured during the September 17, 2015 sampling event remains in excess of cleanup levels around the source area. Samples from MW-5, which is on the east edge of the source area and near the eastern property boundary, contained the highest levels of contaminants of concern (COCs). Monitoring of all site wells will continue for 2016 for COCs including GRO, DRO, benzene and include monitoring of groundwater flow direction and gradient.	Shawn Tisdell
8/1/2016	Document, Report, or Work plan Review - other	DEC received and reviewed 2016 Groundwater Monitoring and Sampling Work Plan. Sampling frequency will be reduced to once per year.	Shawn Tisdell
9/28/2016	Meeting or Teleconference Held	Meeting at the Fairbanks DEC office with representatives from Chevron and GHD. Post remediation borings to assess remaining soil contamination levels and MNA parameters was discussed. The impact of new cleanup levels from the updated regulation package will also need to be evaluated.	Shawn Tisdell
10/6/2016	Meeting or Teleconference Held	Meeting with RP and consultant on multiple Chevron sites to discuss current site status and upcoming site action.	Shawn Tisdell
11/29/2016	Document, Report, or Work plan Review - other	DEC reviewed the First Semiannual 2016 Groundwater Monitoring Report. Some rebound of hydrocarbon contaminant levels has occurred in the source area wells following the 2014 removal of the soil vapor extraction/air sparge system, however the levels remain significantly lower than before system operation. . Due to the observed rebound in contaminant concentrations in these wells, additional monitoring of the source area wells will be needed to satisfy closure conditions. DEC recommends providing additional lines of evidence to indicate closure criteria have been met.	Shawn Tisdell
7/6/2017	Document, Report, or Work plan Review - other	DEC staff reviewed a work plan titled "Site Assessment Work Plan" and approved of the work scope. This scope includes advancing six soil borings at down gradient locations to areas with previous cleanup level exceedances in order to assess attenuation in areas with previous exceedances and to evaluate post-remediation soil quality. This work is scheduled for the third quarter of 2017.	Shawn Tisdell
8/11/2017	Site Visit	DEC staff visited the site to observe a portion of the geotechnical survey being conducted in preparation for upcoming site assessment that will consist of installing 5 soil borings. The survey consisted of a technician from ULS Services Corp. who used a pipe locators and a ground penetrating radar system to identify potential obstructions and utilities in the proposed boring areas.	Shawn Tisdell
6/6/2018	Document, Report, or Work plan Review - other	Confirmation Assessment Report received by the DEC. On August 24, 2017, six borings were advanced to assess post-remediation soil quality. The consultant, GHD, indicates that petroleum hydrocarbons have been vertically delineated and do not extend beyond 22ft below ground surface. Residual contamination exceeding migration to groundwater cleanup levels remains at the capillary fringe near the former USTs. Pending the 2018 groundwater sampling results, GHD will evaluate a cleanup complete with institutional controls.	Shawn Tisdell
7/18/2018	Offsite Soil or Groundwater Disposal Approved	Transport approval provided for soil cuttings from test boreholes from site to Alaska Soil Recycling in Anchorage. Amount was 4.3 yards in 4 super sacks and 1 55-gal drum.	Shawn Tisdell
11/8/2018	Meeting or Teleconference Held	DEC staff met with Chevron and ARCADIS representatives to determine site status and discuss the path forward for multiple sites. Chevron is in the process of transferring site managers from GHD to ARCADIS.	Shawn Tisdell
5/3/2019	Document, Report, or Work plan Review - other	The DEC has determined that the groundwater monitoring work plan submitted for this site does not meet the minimum requirements as defined in DEC guidance and has requested that it be revised.	Shawn Tisdell
6/13/2019	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 77735 Underground Storage Tanks.	Shawn Tisdell
8/9/2019	Meeting or Teleconference Held	DEC staff met with Arcadis and Chevron representatives to discuss the current status and upcoming site cleanup goals for this site.	Shawn Tisdell
12/31/2019	Document, Report, or Work plan Review - other	DEC received the 2019 Annual Groundwater Monitoring Report	Rebekah Reams
3/5/2020	Document, Report, or Work plan Review - other	DEC received Site Groundwater Monitoring Work Plan	Rebekah Reams
4/24/2020	Document, Report, or Work plan Review - other	DEC provided comments on the 2019 Annual Groundwater Monitoring Report submitted December 31, 2019 and the Site Groundwater Monitoring Work Plan submitted March 5, 2020.	Rebekah Reams
6/23/2020	Document, Report, or Work plan Review - other	ADEC received the revised long term groundwater monitoring work plan. The work plan was originally submitted on March 5, 2020 and establishes annual groundwater sampling of monitoring wells at the site.	Rebekah Reams
1/15/2021	Meeting or Teleconference Held	DEC staff met with Chevron Environmental Management Company (CEMC) and Arcadis to discuss Chevron sites located in Alaska during the Annual Portfolio Meeting on January 14th and 15th, 2021.	Rebekah Reams
5/17/2021	Update or Other Action	As part of road widening activities, DOT excavated test pits to three feet below ground surface along Minnie Street and Old Steese Highway and sampled for VOCs and GRO, DRO, and RRO. Contaminants were not observed above DEC soil cleanup levels.	Rebekah Reams
7/20/2021	Document, Report, or Work plan Review - other	2020 Annual Groundwater Monitoring event was conducted on July 20th through 22nd, 2020. Groundwater samples were collected from monitoring wells MW-1 through MW-10. Samples were submitted to the laboratory for GRO, DRO, BTEX, EDB, and lead analysis. Groundwater flow direction was to the west-northwest and depth to groundwater was 9.00 to 12.60 feet below ground surface.	Rebekah Reams
3/30/2022	Document, Report, or Work plan Review - other	2021 Annual Groundwater Monitoring event was conducted on July 14th, 2021. Groundwater samples were collected from monitoring wells MW-1 through MW-4 and MW-6 through MW-10. Monitoring well MW-5 could not be located due to construction. Samples were submitted to the laboratory for GRO, DRO, BTEX, EDB, and lead analysis. Groundwater flow direction was to the west and depth to groundwater was 11.01 to 14.42 feet below ground surface.	Rebekah Reams
6/28/2022	Update or Other Action	DEC approved a request to discontinue sampling at monitoring wells MW-7, MW-8, MW-9, and MW-10 and to initiate biennial well surveys of the monitoring well network.	Rebekah Reams
9/29/2022	Document, Report, or Work plan Review - other	ADEC provided comments on the Treatment of Purge Water Utilizing Granular Activated Carbon (GAC) at Chevron Environmental Management Company Sites which includes standard operating procedures and breakthrough estimates proposed for use at this site.	Rebekah Reams
10/7/2022	Document, Report, or Work plan Review - other	DEC approved the Monitoring Well Abandonment Work Plan, which proposes to decommission monitoring wells MW-7, MW-8, MW-9, and MW-10. Contaminants of concern identified at these wells has included benzene, ethylbenzene, total xylenes, EDC, and naphthalene. No analytes have exceeded cleanup levels since September 2014.	Rebekah Reams
11/8/2022	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 77735 Underground Storage Tanks.	Rebekah Reams
11/15/2022	Document, Report, or Work plan Review - other	2022 Annual Groundwater Monitoring event was conducted on July 11th, 2022. Groundwater samples were collected from monitoring wells MW-1 through MW-4 and MW-6. Monitoring well MW-5 has been paved over. Samples were submitted to the laboratory for GRO, DRO, BTEX, EDB, and lead analysis. Groundwater flow direction was to the west and depth to groundwater was 10.13 to 13.54 feet below ground surface.	Rebekah Reams
11/15/2022	Document, Report, or Work plan Review - other	DEC reviewed the Monitoring Well Abandonment Report which documents the abandonment of monitoring wells MW-7, MW-8, MW-9, and MW-10.	Rebekah Reams
11/17/2022	Document, Report, or Work plan Review - other	DEC provided comments on the Conceptual Site Model report which summarizes site history, evaluates potential exposure pathways, identifies data gaps, and recommends next steps for the site.	Rebekah Reams
4/11/2023	Long Term Monitoring Workplan or Report Review	ADEC approved the Revised Groundwater Sampling Work Plan which proposes to expand the sampling plan to include analysis for DRO, GRO, BTEX, EDC, EDB, PCE, isopropylbenzene, methylene chloride, naphthalene, 1,1,2-trichloroethane 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, vinyl chloride, arsenic, and lead at monitoring wells MW-1 through MW-6 on an annual basis	Rebekah Reams
6/27/2023	Document, Report, or Work plan Review - other	ADEC approved the Revised Site Investigation Work Plan following comment resolution. This work plan proposes to advance 14 soil boring and convert one boring to a monitoring well in order to delineate soil and groundwater impacts at the site.	Rebekah Reams
9/7/2023	Offsite Soil or Groundwater Disposal Approved	ADEC approved transport of 73 gallons of purge water for off-site treatment and disposal	Rebekah Reams
1/18/2024	Long Term Monitoring Workplan or Report Review	2023 Annual Groundwater Monitoring event was conducted on July 26th, 2023 for monitoring wells MW-1 through MW-4, and MW-6 and on August 10th for newly installed wells MW-11 through MW-15. Depth to groundwater was 10.74 to 13.71 feet below ground surface. DRO, GRO, BTEX, naphthalene, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, arsenic and lead exceeded cleanup levels during this sampling event. DEC concurred with the recommendation to increase sampling frequency from an annual to a semi-annual schedule.	Rebekah Reams

Action Date

Action

Description

DEC Staff

2/7/1992

Site Added to Database

Former Staff

2/7/1992

Leaking Underground Storage Tank Release Confirmed - Petroleum

LUST Site created in CSP for source area ID 77735 ADD;

Former Staff

2/12/1992

Underground Storage Tank Site Characterization or Assessment

SA1R;

Former Staff

2/28/1992

Update or Other Action

RPS;

Former Staff

3/17/1992

Update or Other Action

TECH; Spoke about site to lawyer for PRP.

Former Staff

3/19/1992

Update or Other Action

TECH; Met w/property owner of USTravel Systems site. Explained/helped fillout UST Cleanup Grant Application package.

Former Staff

3/24/1992

Update or Other Action

NOR; Letter sent to validate release. Requested release investigation & cleanup.

Former Staff

8/3/1992

Update or Other Action

CORR; Thomas responded to attorney letter. Re: PRP liability.

Former Staff

8/28/1992

Update or Other Action

UPD; Hung reviewed.

Former Staff

10/14/1992

Update or Other Action

MEET; Thomas - met with property owner to discuss release investigation strategy.

Former Staff

10/26/1992

Update or Other Action

CORR; Thomas - Summarized outline of release investigation requirements.

Former Staff

11/19/1992

Underground Storage Tank Site Characterization or Assessment

SA1; Thomas - Received and reviewed draft proposal for SA/RI; approved w/4 conditions; requested revised draft, site is funded under UST FAP program.

Former Staff

11/19/1992

Underground Storage Tank Site Characterization or Assessment

SA1R; Thomas - Reviewed and conditionally approved draft proposal.

Former Staff

2/16/1993

Update or Other Action

MEET; THomas: met with J. Feist and S&W , reviewed and verbally approved modified work plan. Fianl version will be submitted next week.

Former Staff

3/15/1993

Update or Other Action

CORR; Thomas gave final approval of modified release investigation plan.

Former Staff

3/22/1993

Underground Storage Tank Site Characterization or Assessment

SA1; Thomas: S&W completed release investigation which included 7 borings, 4 of which were converted into MW's. Free product found in all wells ranging from sheen to 3.75" in DOT-MW. No waste oil constituents noted. Soils contaminated at varying levels in borings. Contamination more widespread than suspected. Hydraulic link to MAPCO unknown.

Former Staff

5/6/1993

Release Investigation

RELR; Thomas reviewed and approved release investigation. Suggested completing GW elevations & analyses and begin developing corrective action strategy to include plume delineation, tank removal, product recovery (where feasable). Will await to receive summary of GW data and list of treatment alternatives.

Former Staff

5/26/1993

Update or Other Action

MEET; Thomas met with Fiest/Davidson and S&W to discuss summary of Release investigation. ADEC suggested continuing collecting data on GW and begin a draft corrective action proposal. Final RI report will be submitted w/recommendation for cleanup. Talked with FAP people as well, to coordinate next year's funding request.

Former Staff

8/24/1993

Update or Other Action

MEET; Thomas met with US Travel to discuss S&W's Corrective Action plan, schedule and cost. Thomas will offer full tech review and comment shortly. Conceptually, plan looks good.

Former Staff

8/24/1993

Leaking Underground Storage Tank Corrective Action Underway

CAPR; Thomas reviewed and conditionally approved CAP for site. Plan calls for 3 additional MWs, and an air sarg/VES treatment system in situ. Plan also includes removal of 1-3 suspected in-place USTs. Tanks to be removed Fall '93, VES to be designed winter 93-94 and pilot and fianl snatem tested and installed spring '94.

Former Staff

9/10/1993

Leaking Underground Storage Tank Corrective Action Underway

LCAR; Thomas reviewed and approved revised corrective action plan for ground water remediation. Modifications to original plan included manual free product recovery, a contingency for haz wastes removed from waste oil tank, tank decommissioning notice, a pilot test for the AS/VES system, and excluded a well search. Thomas approved work elements and schedule. Forwarded plan to UST FAP for fiscal approval.

Former Staff

1/14/1994

Update or Other Action

RPL2; Peterson sent PRP-CS Database Notification Letter to RP requesting update and more environmental information. RP responded with completed information form.

Former Staff

6/6/1994

Update or Other Action

CORR; Wingerter sent letter informing RP of their financial liability under new ADEC cost recovery policy. State is authorized, under Section 9003(h) of the Resource Conservation and Recovery Act to take action on this LUST facility.

Former Staff

8/1/1994

Leaking Underground Storage Tank Cleanup Initiated - Petroleum

LCAU; Abandonned waste oil tank removed. AS/SVE system designed and installed. System should be on line by 2/95 to treat contaminated soil, ground water and free product.

Former Staff

8/24/1994

Underground Storage Tank Site Characterization or Assessment

SA1R; Thomas reviewed SA for 500 gallon used oil tank. Approx. 6 yards of contaminated soils removed and stockpiled. Exploratory trench dug as well to try and locate another suspected UST. Not found. 15 yards of soil from trench were stockpiled. All soils were brought to OIT for incineration. Soils beneath tank below cleanup levels; waste oil tank closed. Cleanup will continue on the rest of the property under the FAP grant.

Former Staff

9/16/1994

Leaking Underground Storage Tank Corrective Action Underway

CAPR; Thomas reviewed CAP for AS/SVE. Made a number of design comments that were addressed in phone conference with Shannon & Wilson. Only outstanding issue is VOC emmissions. Plan conditionally approved. System should be installed soon.

Former Staff

9/27/1994

Update or Other Action

CORR; Thomas sent correspondence to Alaska Environmental Specialists, stating that the Site Assessment information as provided is not adequate. Requested full SA/Tank closure/CAP within 30 days. Also spoke with AES that day and asked them to coordinate soil treatment with Kenai district. Plan as approved by ADEC not followed and therefore not approved.

Former Staff

10/3/1994

Update or Other Action

CORR; Thomas sent final approval letter for CAP. Contingency stated that of VOC emmissions exceeded, ADEC will ask for immediate correction.

Former Staff

1/13/1995

Update or Other Action

UPD; SITE SUMMARY: AS/SVE system by S&W about to go on line. Site has GW (product) in all corners of property. System should be operational shortly, afterwards, ADEC should receive quarterly ground water sample results. Watch for plume co-mingling from adjacent MAPCO station.

Former Staff

1/17/1996

Leaking Underground Storage Tank Corrective Action Underway

CAPR; Reviewed on-going CAP of SVE/Air Sparging & FA. Consulted w/RPCON on costs reduction. Decided to change schedule fr. quarterly to every 6 mos. for grd. water sampling effective 6/96. Wrote ltr. to RP/RPCON re-decision.

Former Staff

4/4/1997

Long Term Monitoring Established

Approved RPCON's 12/12/96 work plan for FAP. Unable to reduce lab costs due to reg requirement.

Former Staff

11/20/1997

Update or Other Action

ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: US TRAVEL SYSTEMS - DAVIDSON INC

Former Staff

12/1/1997

Long Term Monitoring Established

Approved '98 wk pl for FAP. Modification of MW 1 (VEW1b) since grd water changed direction to more westerly than NW. DOT road widening Proj. spring '98 will jeopardize half of MW1 w/proposed VEW1b. Also affect AIW-3, MW5, AIW-5 & MW2.

Former Staff

10/14/1998

Long Term Monitoring Established

Reviewed FY '99 wk pl for FAP. Approved except for some reductions in sampling schedule. MWs 4, 5 & 6 once/yr as Benzene high, MWs 1, 2 & 3 twice/yr as MW1 new air sparge/SV wells installed, MW 4 analyze w/602/601/624 (MW 2 & 3 show nothing) & discharge air sampling 2 quarters instead of 4. Road proj. not started.

Former Staff

1/31/2001

Update or Other Action

Groundwater monitoring report submitted. Event was scheduled for July 2000 but was postponed due to dewatering in the Old Steese Highway. Samples were collected from MW-2 and MW-3 on November 17. The rest of the samples were collected on December 1 following construction of the sewer line in the Old Steese. Seven wells contained benzene above cleanup levels; the maximum concentration was 1,010 ppb (in MW-3). EDB was detected in MW-4.

Janice Wiegers

1/23/2002

Document, Report, or Work plan Review - other

Summary report submitted under Grant 15274231. Conceptual Site Model included in report. On-site indoor air and excavation/trench workers identified as primary receptors.

Janice Wiegers

1/24/2002

Update or Other Action

Groundwater monitoring and well point installation report submitted. Groundwater samples and two slough samples were collected on July 30. Eight well points were installed on Santina's Flowers and Burger King properties and sampled on September 6 and 7. Benzene exceeded cleanup levels in MW-4 and MW-7 with a maximum concentration of 26.1 ppb in MW-4. Benzene exceeded cleanup levels in all well points except WP-1, with a maximum concentration of 520 ppb in WP-7. PCE exceeded cleanup levels in WP-6, but was attributed to a separate source. Slough water samples were collected in two places - no contaminants detected.

Janice Wiegers

4/5/2002

Update or Other Action

Groundwater monitoring report submitted. Samples collected on February 22. Benzene exceeded cleanup levels in MW-3 and MW-6, with a maximum concentration of 1,700 ppb. In general, samples collected without purging. A sample collected at MW-3 with purging contained approximately 2x the benzene concentration as the no-purge sample. Slough contained 1.5 feet of ice and was not sampled.

Janice Wiegers

1/17/2003

Update or Other Action

Groundwater monitoring and slough sampling report submitted. Samples collected August 19 and 20. Maximum benzene concentration (280 ppb) in new off-site well MW-9. Maximum GRO (3.4 ppm) in MW-4. Solvents detected below cleanup levels in MW-9. Geochemical analysis of the groundwater suggests not enough oxidants present to biodegrade observed GRO concentrations.

Janice Wiegers

1/23/2003

Update or Other Action

Release investigation and CSM report submitted. MW-9 and MW-10 were installed. The system continues to remove VOCs, but appears to hve reached limits of effectiveness. However, benzene levels have fluctuated up to 1,700 ppb during recent groundwater sampling.

Janice Wiegers

5/20/2003

Document, Report, or Work plan Review - other

System performance report submitted. Evaluated system performance and conclude that GRO and benzene are dissolving into the groundwater from outside the radius of influence of the treatment wells. Cost of additional treatment wells may not be cost-effective. Enhanced bioremediation approach is planned for this site as a polishing step.

Janice Wiegers

10/27/2003

Update or Other Action

Bioremediation treatability study report submitted. No significant effects were found during bench-scale testing for adding nitrogen amendments. Nitrogen amendments not recommended.

Janice Wiegers

11/24/2003

Update or Other Action

Semiannual groundwater monitoring report submitted.

Janice Wiegers

1/14/2004

Update or Other Action

ChevronTexaco responds to PRP letter accepting responsibility for the contamination. Chevron will submit a plan to further evaluate the extent of impacted groundwater and to enhance the remediation system by the second quarter of 2005.

Janice Wiegers

3/5/2004

Document, Report, or Work plan Review - other

ADEC approves workplan for Indoor Air Quality assessment of the office building at 230 Old Steese.

Janice Wiegers

4/7/2004

Update or Other Action

Indoor air quality assessment plan submitted. Use of commercial exposure parameters proposed. DEC approves with use of more stringent parameters.

Janice Wiegers

6/14/2004

Update or Other Action

Indoor air quality assessment submitted. A limited ventilation and airflow evaluation was completed. Two indoor air and one outdoor air samples were collected in April and again in May. BTEX levels were below the DEC acceptable risk level but above the level typically used to indicate monitoring is needed. There was indication that contaminants could be from outdoor air.

Janice Wiegers

6/14/2004

Update or Other Action

Summary report for indoor air assessment submitted. Summarized indoor air data for all constituents tested.

Janice Wiegers

6/14/2004

Update or Other Action

Request for NFRAP submitted.

Janice Wiegers

6/14/2004

Document, Report, or Work plan Review - other

Report describing injection of oxygen releasing compound submitted. ORC was injected into 15 soil boring at 17 feet bgs in the former tank and dispenser island locations. Borings were space approximately 10 feet apart. ORC was also injected into sparge wells AIW-4, AIW-5, AIW-6, AIW-7, and AIW-8. Repairs to the sparge wells will be needed if the system is restarted.

Janice Wiegers

10/14/2004

Update or Other Action

PRP letter sent to ChevronTexaco following a meeting with the current landowners. Texaco was identified as the owners and operators of the USTs that resulted in the release. According to Mr. Davidson, he never operated the gas station and removed the USTs after buying the property.

Janice Wiegers

8/15/2005

Update or Other Action

Oasis submits groundwater monitoring report on behalf of ChevronTexaco. Tested for GRO and VOCs. EDB also tested with Method 504 in MW-4 and MW-8. MW-1, MW-2, MW-3, MW-4, MW-6, and MW-7 contained contaminant levels above the MCL. EDB was observed above the cleanup levels in MW-4 and MW-6. 1,2-DCA exceeded cleanup levels in MW-4. Based on previous discussions with Secor, ChevronTexaco plans to conduct several monitoring events to evaluate the groundwater quality after the system was shutdown before deciding what further action to take.

Janice Wiegers

12/19/2005

Document, Report, or Work plan Review - other

Oasis submits groundwater monitoring report for October sampling. Wells were resurveyed - groundwater flow direction was similar to historical directions. However, gradient may steepen near the slough. Contaminants were found in all nine wells sampled with the highest concentations in MW-4 and MW-6. VOCs and EDB (method 8011) were tested in select wells. EDB was the only analyte found above groundwater cleanup levels (in MW-4).

Janice Wiegers

6/29/2006

Update or Other Action

Dave Mongold is a prospective purchaser of the property and has hired an attorney, James DeWitt to inquire about liability issues with purchasing the property.

Deborah Williams

8/8/2006

Update or Other Action

ADEC received BBL's First Semi-Annual 2006 Groundwater Monitoring Report. GRO levels were detected in eight of the nine samples with concentrations ranging from 25 ug/L (MW-8) to 32,000 ug/L (MW-2 and MW-6). Benzene was detected in eight of the nine samples at concentrations ranging from 5.7 ug/L (MW-7) to 2,300 ug/L (MW-4). EDB was analyzed for in MW-1, MW-2, MW-3, MW-4, and MW-8. EDB was detected in samples above ADEC cleanup levels from MW-4 at 0.18 ug/L. Groundwater from MW-2 and MW-3 were analyzed for eight RCRA metals. Arsenic and lead was found above ADEC cleanup levels in both wells.

Deborah Williams

12/4/2006

Document, Report, or Work plan Review - other

ADEC reviewed the Second Semi-Annual 2006 Groundwater Monitoring Report for the US Travel site. GRO levels ranged from non-detect to 19,000 ppb, DRO ranged from 47 ppb to 5,000 ppb, and bezene ranged from 1 ppb to 1,600 ppb. MW-2 and MW-3 were sampled and analyzed for VOCs, metals, EDB and PAHs and they all met ADEC cleanup levels.

Deborah Williams

12/28/2006

Document, Report, or Work plan Review - other

ADEC received BBL's report entitled Additional Soil Characterization Report for the Former Texaco 21-1083 LUST site located at 230 Old Steese Highway. A Ground Penetrating Radar and Electromagnetic Survey was completed at the site. Also, 16 membrane interface probe (MIP) borings were completed and advanced to depths of up to 21-feet bgs. The MIP cross-sections showed that generally the VOCs are located in the smear zone from approximately 10-ft to 15-ft bgs or are associated with the impacted groundwater. MIP-16 which was located in the former north dispenser island had VOCs detected at depths as shallow as 8.5-feet bgs. Three confirmational borings were completed and co-located with a MIP boring. Confirmational soil samples were collected from the borings at 5-feet intervals. The laboratory analytical data confirm the MIP data. BBL concluded that the additional soil delineation showed hydrocarbon impact in the smear zone with the exception of the former north dispenser island area. They recommend that Anomaly A be further investigated to determine whether a UST is present or the anomaly was caused by impacted soil.

Deborah Williams

3/13/2007

Exposure Tracking Model Ranking

Initial ranking completed.

Deborah Williams

6/6/2007

Leaking Underground Storage Tank Corrective Action Underway

ADEC received and approved the ARCADIS BBLES Remediation Workplan, Former Chevron 211083, Fairbanks, Alaska dated May 17, 2007. Remediation workplan includes installation of 11 soil borings to be used as air sparge wells and 7 soil borings to be used as soil vapor extraction wells.

Tamara Cardona-Marek

6/8/2007

Update or Other Action

Deborah Williams

12/10/2007

Update or Other Action

ADEC received ARCADIS BBLES First Semi-annual 2007 Groundwater Monitoring Report for the Former Chevron Facility 211083 site. According to the report, the analytical results of the March 2007 groundwater sampling event are consistent with previous events. During the monitoring event, concentrations of GRO, DRO, benzene, toluene, ethylbenzene, and EDB were greater than the applicable ADEC groundwater cleanup levels in at least one groundwater sample. EDB was detected in wells MW-4 and MW-6. Lead and arsenic did not exceed cleanup levels. ARCADIS recommends eliminating EDB sampling from wells MW1, MW2, MW3, MW7, MW8, MW9, and MW10. DEC approves eliminating EDB sampling from wells MW-1, MW-2, MW-7, MW-8 and MW-10.

Tamara Cardona-Marek

2/5/2008

Update or Other Action

DEC received the ARCADIS Remediation System Installation Report.

Tamara Cardona-Marek

6/25/2008

Update or Other Action

ADEC received the First Semi Annual 2008 Groundwater Monitoring Report for the former US Travel Site. Results are consistent with previous monitoring events. DRO, GRO, BTEX, EDB and lead exceeded the applicable GCL in at least two monitoring wells. New AS/SVE system was installed and began operating shortly after this monitoring event (4/9/2008).

Tamara Cardona-Marek

12/24/2008

Update or Other Action

ADEC received the 2008 Second Semi-Annual groundwater Monitoring Report for the US Travel site. DRO, GRO and BTEX has decreased from previous sampling event in wells MW-1, MW-4 and MW-6. Well MW-3 could not be sampled. Contaminants in well MW-5 maintained concentrations similar to previous sampling events. AS/SVE system has been working since April 2008.

Tamara Cardona-Marek

3/13/2009

Meeting or Teleconference Held

ADEC dicussed with Chevron and Arcadis the status of the site. AS/SVE system will continue to operate on the site. Arcadis will submit graphs and plume maps to show progress over time as part of the current year's tasks.

Tamara Cardona-Marek

6/8/2009

Update or Other Action

DEC received the First Quarter 2009 Remediation System Operation and Maintenance Report for the US Travel Site. System was operational for ablmost 100% of the planned operational period. No benzene detected in the air effluent samples. 39 pounds of GRO were removed during this reporting period.

Tamara Cardona-Marek

6/9/2009

Update or Other Action

DEC received sample results from purge water and request for approval to transport through Emerald to Anchorage for disposal. DEC granted approval.

Tamara Cardona-Marek

6/30/2009

Offsite Soil or Groundwater Disposal Approved

Approval granted for disposal of 6 55 gal drums of soil originating from site. No contaminants above cleanup levels detected in composite samples.

Tamara Cardona-Marek

12/3/2009

Document, Report, or Work plan Review - other

DEC received and reviewed the First Semi-Annual 2009 groundwater monitoring report. Contaminant concentrations are consistent with previous monitoring events. MNA parameters were measured, however AS/SVE system is currently running. Arcadis recommended that monthly gauging is suspended. DEC agreed with the recommendation but requested that a graph and information documenting the trends observed is submitted. Chevron has changed consultants from Arcadis to CRA, therefore future reports and monitoring events will be done by CRA.

Tamara Cardona-Marek

12/4/2009

Document, Report, or Work plan Review - other

DEC received the second quarter operations and maintenance report for 2009 for the AS/SVE system. Approximately 165 pounds of GRO were removed from the subsurface during this reporting period.

Tamara Cardona-Marek

3/12/2010

Meeting or Teleconference Held

DEC met with Chevron and CRA to discuss actions for 2010. CRA proposes to conduct a rebound study and continue semi annual sampling to evaluate its effects. System will be restarted if conditions significantly rebound.

Tamara Cardona-Marek

2/10/2011

Document, Report, or Work plan Review - other

DEC received and reviewed the two Semiannual 2010 Groundwater Monitoring Reports for this facility.

Tamara Cardona-Marek

2/15/2011

Update or Other Action

CRA submitted responses to DEC comments on the 2010 Groundwater Monitoring Reports.

Tamara Cardona-Marek

2/24/2011

Meeting or Teleconference Held

DEC met with Chevron to discuss the proposed 2011 site activities. Semi annualgroundwater monitoring will continue . Possible rebound of contaminants will be evaluated. Conceptual site model will be updated.

Tamara Cardona-Marek

8/2/2011

Site Visit

Site visit with consultant and DEC intern to see remediation system.

Tamara Cardona-Marek

8/2/2011

Meeting or Teleconference Held

DEC met with Chevron and CRA to discuss status of site. Remediation system has been shutdown for rebound testing.

Tamara Cardona-Marek

8/5/2011

Document, Report, or Work plan Review - other

DEC received from CRA and reviewed the 2009 and 2010 Operations and Maintenance and Groundwater Monitoring Reports. Contaminant concentrations in groundwater have decreased, results of rebound test are pending.

Tamara Cardona-Marek

8/8/2011

Document, Report, or Work plan Review - other

DEC received from CRA and reviewed the First and Second Semi Annual 2010 Groundwater Monitoring Report.

Tamara Cardona-Marek

12/29/2011

Document, Report, or Work plan Review - other

DEC received the First and Second Semi Annual 2011 Groundwater Monitoring and Sampling Report for the former US Travel site. GRO exceeded the groundwater cleanup levels in wells MW-3 and MW-5 in both events and in MW-2 in one of the monitoring events; benzene exceeded cleanup levels in wells MW-1, MW-3 through MW-6, and in MW-9; DRO was exceeded in wells MW-3 through MW-6.

Tamara Cardona-Marek

12/31/2012

Document, Report, or Work plan Review - other

DEC received the Revised First semi-annual and the Second Semi-annual 2012 groundwater monitoring and sampling reports from CRA. Benzene, DRO, and GRO remain above groundwater cleanup levels in MW-2, MW-3, MW-4, MW-5, and MW-6. MW-1 and MW-9 had benzene above cleanup levels in June, but not in August. The air sparge/soil vapor extraction remediation system could not be restarted due to electrical issues and is currently under repair.

Robert Burgess

2/27/2013

Meeting or Teleconference Held

DEC met with Chevron and consultants. Discussed problems hindering the start-up of the remedial system on site. Electrical and program logic issues are holding up the re-start. CRA plans to continue to work on the system and hopes to either repair or begin to replace it by spring of 2013.

Robert Burgess

9/17/2013

Document, Report, or Work plan Review - other

DEC received the First Semi-Annual 2013 Groundwater Monitoring and Sampling Report. The remedial system was re-started in March 2013. The system has decreased concentrations in several wells compared to the most recent sampling events, however contaminants remain above cleanup levels in source area wells MW-1, MW-4, and MW-5, and in MW-9. The system will run for at least one year before evaluating rebound.

Robert Burgess

12/3/2013

Document, Report, or Work plan Review - other

DEC received the Second Semi-Annual 2013 Groundwater Monitoring and Sampling Report. Contaminant concentrations have decreased to levels below cleanup in all wells except MW-4, which contained DRO at 1.7 mg/L. Natural attenuation paramaters were measured despite the AS/SVE system operating. Air sparging has shifted conditions from highly reduced to more oxidizing.

Robert Burgess

1/27/2014

Document, Report, or Work plan Review - other

DEC reviewed and commented on the 1st semiannual 2013 remediation system operations and maintenance report. The system was restarted in March of 2013 and will run for at least one year before re-evaluating rebound.

Robert Burgess

2/26/2014

Meeting or Teleconference Held

DEC met with Chevron and their consultants for a project update and planning session. The effectiveness of the remedial system is declining and Chevron has requested removal of the system by July 1, 2014. Previous rebound tests showed minimal rebound; DEC agreed to review the data and respond to the request as soon as possible. A vapor intrusion assessment for the on-property building will be conducted after the system is shut down, since it will no longer be mitigating soil vapor. MNA sampling was discussed, and it was agreed that more data is needed before drawing conclusions about MNA at the site. The sampling schedule will be adjusted to allow for sampling during winter, when the aquifer is in a steady state.

Robert Burgess

4/10/2014

Update or Other Action

DEC approved the removal of the remedial system at the site with the condition that the vapor intrusion pathway be evaluated when the system is shut off, and that mitigation of this pathway is implemented if vapor intrusion is a risk.

Robert Burgess

4/15/2014

Update or Other Action

DEC received notice that the remedial system would be shut down this week in order to allow adequate time for equilibration before the soil vapor/vapor intrusion investigation.

Robert Burgess

5/8/2014

Site Visit

DEC project manager visited the site to observe groundwater sampling.

Robert Burgess

5/9/2014

Site Visit

DEC project manager visited the site to observe boring hole clearance for soil vapor probe installation as well as soil sampling from the base of the boreholes.

Robert Burgess

5/21/2014

Document, Report, or Work plan Review - other

DEC provided comments on the Soil Vapor Assessment Workplan.

Robert Burgess

5/28/2014

Document, Report, or Work plan Review - other

DEC approved the Soil Vapor Assessment workplan following comment resolution and revision. Three soil vapor probes will be installed near the slab-on-grade building to a depth of 8 feet to evaluate the presence of soil gas and likelihood of vapor intrusion.

Robert Burgess

6/2/2014

Site Visit

DEC staff Burgess and Wiegers visited the site to answer questions related to soil vapor sampling and to observe sampling of soil vapor probes.

Robert Burgess

6/16/2014

Document, Report, or Work plan Review - other

DEC project manager approved the Remedial System Decommissioning workplan.

Robert Burgess

2/24/2015

Meeting or Teleconference Held

ADEC project manager met with Chevron and CRA after providing comments to several reports, including the First and Second Semi-Annual Groundwater Monitoring Reports, the Remedial System Decommissioning Report, the Soil Vapor Assessment Report, and an updated conceptual site model. Revised reports will be submitted or comments will be incorporated into reports that include the second round of vapor sampling. Currently all of the equipment from the remedial system has been removed from the site and there is no evidence of rebound. Planned work is to analyze data from the second vapor sampling event, decommission vapor probes if below target levels, and continue semi-annual monitoring of groundwater.

Robert Burgess

3/9/2015

Document, Report, or Work plan Review - other

ADEC reviewed the revised First and Second Semiannual groundwater monitoring reports. Concentrations of hydrocarbons in groundwater remain stable following shutdown of the remedial system. Samples from source area wells continue to be slightly above cleanup levels; monitored natural attenuation will be employed at the site to ensure that concentrations continue to decrease through biodegradation.

Robert Burgess

5/13/2015

Document, Report, or Work plan Review - other

DEC approved the Soil Vapor Probe Decommissioning workplan and the Revised Groundwater Sampling Workplan.

Robert Burgess

2/11/2016

Document, Report, or Work plan Review - other

ADEC reviewed the August 2015 Soil Vapor Probe Decommissioning Report. Work conducted by GHD followed the approved work plan and field notes indicated the work included repairs to a decommissioned system well cement plug that had been damaged by a snow plow. Three soil vapor probes were decommissioned on May 28, 2015. Tubing was removed and bentonite was used to fill the boring. Gravel and asphalt were added to bring the fill up to grade. Decommissioning photos were requested.

Shawn Tisdell

2/11/2016

Document, Report, or Work plan Review - other

The December 31, 2015 Revised Conceptual Site Model was reviewed. ADEC indicated Noyes Slough must be considered a complete pathway for surface water ingestion, not incomplete as written in the report, as it can potentially be a source of drinking water, even though the water quality is poor.

Shawn Tisdell

2/12/2016

Document, Report, or Work plan Review - other

Decommissioning photos of soil vapor extraction wells received by DEC.

Shawn Tisdell

2/24/2016

Meeting or Teleconference Held

Teleconference meeting between ADEC and Chevron consultants from GHD. Reviewed completed work described in previous action comments. In 2016 GHD will continued semiannual groundwater monitoring and report submission.

Shawn Tisdell

3/4/2016

Document, Report, or Work plan Review - other

DEC has reviewed the Second Semi-Annual 2015 Groundwater Monitoring Report from GHD Services Inc. Past remediation at the site has significantly reduced groundwater contamination. However, groundwater contamination measured during the September 17, 2015 sampling event remains in excess of cleanup levels around the source area. Samples from MW-5, which is on the east edge of the source area and near the eastern property boundary, contained the highest levels of contaminants of concern (COCs). Monitoring of all site wells will continue for 2016 for COCs including GRO, DRO, benzene and include monitoring of groundwater flow direction and gradient.

Shawn Tisdell

8/1/2016

Document, Report, or Work plan Review - other

DEC received and reviewed 2016 Groundwater Monitoring and Sampling Work Plan. Sampling frequency will be reduced to once per year.

Shawn Tisdell

9/28/2016

Meeting or Teleconference Held

Meeting at the Fairbanks DEC office with representatives from Chevron and GHD. Post remediation borings to assess remaining soil contamination levels and MNA parameters was discussed. The impact of new cleanup levels from the updated regulation package will also need to be evaluated.

Shawn Tisdell

10/6/2016

Meeting or Teleconference Held

Meeting with RP and consultant on multiple Chevron sites to discuss current site status and upcoming site action.

Shawn Tisdell

11/29/2016

Document, Report, or Work plan Review - other

DEC reviewed the First Semiannual 2016 Groundwater Monitoring Report. Some rebound of hydrocarbon contaminant levels has occurred in the source area wells following the 2014 removal of the soil vapor extraction/air sparge system, however the levels remain significantly lower than before system operation. . Due to the observed rebound in contaminant concentrations in these wells, additional monitoring of the source area wells will be needed to satisfy closure conditions. DEC recommends providing additional lines of evidence to indicate closure criteria have been met.

Shawn Tisdell

7/6/2017

Document, Report, or Work plan Review - other

DEC staff reviewed a work plan titled "Site Assessment Work Plan" and approved of the work scope. This scope includes advancing six soil borings at down gradient locations to areas with previous cleanup level exceedances in order to assess attenuation in areas with previous exceedances and to evaluate post-remediation soil quality. This work is scheduled for the third quarter of 2017.

Shawn Tisdell

8/11/2017

Site Visit

DEC staff visited the site to observe a portion of the geotechnical survey being conducted in preparation for upcoming site assessment that will consist of installing 5 soil borings. The survey consisted of a technician from ULS Services Corp. who used a pipe locators and a ground penetrating radar system to identify potential obstructions and utilities in the proposed boring areas.

Shawn Tisdell

6/6/2018

Document, Report, or Work plan Review - other

Confirmation Assessment Report received by the DEC. On August 24, 2017, six borings were advanced to assess post-remediation soil quality. The consultant, GHD, indicates that petroleum hydrocarbons have been vertically delineated and do not extend beyond 22ft below ground surface. Residual contamination exceeding migration to groundwater cleanup levels remains at the capillary fringe near the former USTs. Pending the 2018 groundwater sampling results, GHD will evaluate a cleanup complete with institutional controls.

Shawn Tisdell

7/18/2018

Offsite Soil or Groundwater Disposal Approved

Transport approval provided for soil cuttings from test boreholes from site to Alaska Soil Recycling in Anchorage. Amount was 4.3 yards in 4 super sacks and 1 55-gal drum.

Shawn Tisdell

11/8/2018

Meeting or Teleconference Held

DEC staff met with Chevron and ARCADIS representatives to determine site status and discuss the path forward for multiple sites. Chevron is in the process of transferring site managers from GHD to ARCADIS.

Shawn Tisdell

5/3/2019

Document, Report, or Work plan Review - other

The DEC has determined that the groundwater monitoring work plan submitted for this site does not meet the minimum requirements as defined in DEC guidance and has requested that it be revised.

Shawn Tisdell

6/13/2019

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 77735 Underground Storage Tanks.

Shawn Tisdell

8/9/2019

Meeting or Teleconference Held

DEC staff met with Arcadis and Chevron representatives to discuss the current status and upcoming site cleanup goals for this site.

Shawn Tisdell

12/31/2019

Document, Report, or Work plan Review - other

DEC received the 2019 Annual Groundwater Monitoring Report

Rebekah Reams

3/5/2020

Document, Report, or Work plan Review - other

DEC received Site Groundwater Monitoring Work Plan

Rebekah Reams

4/24/2020

Document, Report, or Work plan Review - other

DEC provided comments on the 2019 Annual Groundwater Monitoring Report submitted December 31, 2019 and the Site Groundwater Monitoring Work Plan submitted March 5, 2020.

Rebekah Reams

6/23/2020

Document, Report, or Work plan Review - other

ADEC received the revised long term groundwater monitoring work plan. The work plan was originally submitted on March 5, 2020 and establishes annual groundwater sampling of monitoring wells at the site.

Rebekah Reams

1/15/2021

Meeting or Teleconference Held

DEC staff met with Chevron Environmental Management Company (CEMC) and Arcadis to discuss Chevron sites located in Alaska during the Annual Portfolio Meeting on January 14th and 15th, 2021.

Rebekah Reams

5/17/2021

Update or Other Action

As part of road widening activities, DOT excavated test pits to three feet below ground surface along Minnie Street and Old Steese Highway and sampled for VOCs and GRO, DRO, and RRO. Contaminants were not observed above DEC soil cleanup levels.

Rebekah Reams

7/20/2021

Document, Report, or Work plan Review - other

2020 Annual Groundwater Monitoring event was conducted on July 20th through 22nd, 2020. Groundwater samples were collected from monitoring wells MW-1 through MW-10. Samples were submitted to the laboratory for GRO, DRO, BTEX, EDB, and lead analysis. Groundwater flow direction was to the west-northwest and depth to groundwater was 9.00 to 12.60 feet below ground surface.

Rebekah Reams

3/30/2022

Document, Report, or Work plan Review - other

2021 Annual Groundwater Monitoring event was conducted on July 14th, 2021. Groundwater samples were collected from monitoring wells MW-1 through MW-4 and MW-6 through MW-10. Monitoring well MW-5 could not be located due to construction. Samples were submitted to the laboratory for GRO, DRO, BTEX, EDB, and lead analysis. Groundwater flow direction was to the west and depth to groundwater was 11.01 to 14.42 feet below ground surface.

Rebekah Reams

6/28/2022

Update or Other Action

DEC approved a request to discontinue sampling at monitoring wells MW-7, MW-8, MW-9, and MW-10 and to initiate biennial well surveys of the monitoring well network.

Rebekah Reams

9/29/2022

Document, Report, or Work plan Review - other

ADEC provided comments on the Treatment of Purge Water Utilizing Granular Activated Carbon (GAC) at Chevron Environmental Management Company Sites which includes standard operating procedures and breakthrough estimates proposed for use at this site.

Rebekah Reams

10/7/2022

Document, Report, or Work plan Review - other

DEC approved the Monitoring Well Abandonment Work Plan, which proposes to decommission monitoring wells MW-7, MW-8, MW-9, and MW-10. Contaminants of concern identified at these wells has included benzene, ethylbenzene, total xylenes, EDC, and naphthalene. No analytes have exceeded cleanup levels since September 2014.

Rebekah Reams

11/8/2022

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 77735 Underground Storage Tanks.

Rebekah Reams

11/15/2022

Document, Report, or Work plan Review - other

2022 Annual Groundwater Monitoring event was conducted on July 11th, 2022. Groundwater samples were collected from monitoring wells MW-1 through MW-4 and MW-6. Monitoring well MW-5 has been paved over. Samples were submitted to the laboratory for GRO, DRO, BTEX, EDB, and lead analysis. Groundwater flow direction was to the west and depth to groundwater was 10.13 to 13.54 feet below ground surface.

Rebekah Reams

11/15/2022

Document, Report, or Work plan Review - other

DEC reviewed the Monitoring Well Abandonment Report which documents the abandonment of monitoring wells MW-7, MW-8, MW-9, and MW-10.

Rebekah Reams

11/17/2022

Document, Report, or Work plan Review - other

DEC provided comments on the Conceptual Site Model report which summarizes site history, evaluates potential exposure pathways, identifies data gaps, and recommends next steps for the site.

Rebekah Reams

4/11/2023

Long Term Monitoring Workplan or Report Review

ADEC approved the Revised Groundwater Sampling Work Plan which proposes to expand the sampling plan to include analysis for DRO, GRO, BTEX, EDC, EDB, PCE, isopropylbenzene, methylene chloride, naphthalene, 1,1,2-trichloroethane 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, vinyl chloride, arsenic, and lead at monitoring wells MW-1 through MW-6 on an annual basis

Rebekah Reams

6/27/2023

Document, Report, or Work plan Review - other

ADEC approved the Revised Site Investigation Work Plan following comment resolution. This work plan proposes to advance 14 soil boring and convert one boring to a monitoring well in order to delineate soil and groundwater impacts at the site.

Rebekah Reams

9/7/2023

Offsite Soil or Groundwater Disposal Approved

ADEC approved transport of 73 gallons of purge water for off-site treatment and disposal

Rebekah Reams

1/18/2024

Long Term Monitoring Workplan or Report Review

2023 Annual Groundwater Monitoring event was conducted on July 26th, 2023 for monitoring wells MW-1 through MW-4, and MW-6 and on August 10th for newly installed wells MW-11 through MW-15. Depth to groundwater was 10.74 to 13.71 feet below ground surface. DRO, GRO, BTEX, naphthalene, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, arsenic and lead exceeded cleanup levels during this sampling event. DEC concurred with the recommendation to increase sampling frequency from an annual to a semi-annual schedule.

Rebekah Reams

Contaminant Information

Name

Level Description

Media

Comments

Control Type

Type

Details

Requirements

Description

Details

2023 Annual Groundwater Monitoring Report

1991 DOT Hazardous Materials Investigation Report

2004 Evaluation of Potential IAQ Impacts Report

2002 Results of Monitoring Well and Temporary Well Point Sampling

2001 Results of Monitoring Well Sampling

2007 Second Semi-Annual Groundwater Monitoring Report

2008 First Semi-Annual Groundwater Monitoring Report

2008 Remediation System Installation Report

2006 Additional Soil Characterization Report

1994 UST Closure Report

2003 Release Investigation Report

2018 Groundwater Monitoring Report

2018 Soil Assessment Report

Site Summary

No associated sites were found.

Missing Location Data

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Alaska Department of Environmental Conservation

Site Report: US Travel Systems, Former

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

2023 Annual Groundwater Monitoring Report

1991 DOT Hazardous Materials Investigation Report

2004 Evaluation of Potential IAQ Impacts Report

2002 Results of Monitoring Well and Temporary Well Point Sampling

2001 Results of Monitoring Well Sampling

2007 Second Semi-Annual Groundwater Monitoring Report

2008 First Semi-Annual Groundwater Monitoring Report

2008 Remediation System Installation Report

2006 Additional Soil Characterization Report

1994 UST Closure Report

2003 Release Investigation Report

2018 Groundwater Monitoring Report

2018 Soil Assessment Report

Site Summary

Missing Location Data

State of Alaska Department of Environmental Conservation