Site Report: Chevron #9-2114, Former Mike's University

Site Name:	Chevron #9-2114, Former Mike's University
Address:	3350 College Road , Fairbanks, AK 99709
File Number:	100.26.097
Hazard ID:	24327
Status:	Active
Staff:	Rebekah Reams, 9074512144 rebekah.reams@alaska.gov
Latitude:	64.857800
Longitude:	-147.799060
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 was the location of a former service station, constructed in 1964 and converted to Mike's University Chevron in 1974. Chevron leased the property between 1974 and 1986 to dispense gasoline and provide automobile services. The service station ceased operations in 1986. Seven underground storage tanks and two aboveground storage tanks were removed from the site. Approximately 800 tons of petroleum impacted soil were excavated from around the former USTs and the pump island in 2001. An air-sparge and soil vapor extraction (AS/SVE) system was installed in September 2002 and operated intermittently until February 2007. The AS/SVE system was replaced and upgraded in July 2009 and operated intermittently until November 2013. An additional 300 CY of contaminated soil was excavated at the site prior to the construction of a permanent restaurant building. Petroleum contaminated groundwater exceeding cleanup levels remains at the site and continues to impact groundwater quality downgradient of the site. Annual groundwater monitoring continues. Formerly known as Plywood Supply Bldg. File# 100.38.059

Action Information

Action Date	Action	Description	DEC Staff
3/25/1992	Site Visit	FI; Soil contamination: diesel range = 590-820ppm, gasoline range = 1700-10,000ppm. Chemist thinks may be "mineral spirits or stoddard solvent. Groundwater contamination: benzene = 240-3200ppb, toluene = 130-32,000ppb, e.benzene = 20-1800ppb, xylenes = 358-3300ppb.	Former Staff
5/12/1992	Site Added to Database		Former Staff
5/12/1992	Leaking Underground Storage Tank Release Confirmed - Petroleum	LUST Site created in CSP for source area ID 77720 ADD;	Former Staff
5/13/1992	Leaking Underground Storage Tank Cleanup Initiated - Petroleum	LCAU; Action Date is estimated for summer of 1996 for the removal of three USTs (see Site Assessment, August 1993). Gas Station Facility was removed in 1986. Six soil borings in 1993 confirmed soil and groundwater contamination. : LCAU date changed DB conversion	Former Staff
6/1/1993	Underground Storage Tank Site Characterization or Assessment	SA1; Thomas reports: Site Assessment undertaken by RZA AGRA for Chevron USA. Assessment included the boring of six holes and the installation of 3 monitor wells. Benzene identified in ground water from 230 to 26,000 ppb. Soil contamination also noted. Service station and tanks were removed from site in 1986. Some private wells may exist in the area.	Former Staff
11/18/1993	Underground Storage Tank Site Characterization or Assessment	SA1R; Thomas reports: Site Assessment reviewed and determined satisfactory. Cover letter of SA stated intent of Chevron to proceed with additional investigation. ADEC sent written response concurring with action. ADEC suggested source removal of contaminated soils in summer 1994. ADEC will wait for next assessment phase report.	Former Staff
4/22/1994	Update or Other Action	CORR; Thomas received and reviewed letter of intent from Chevron. Chevron plans to address ADEC's concerns about source removal. Chevron also submitted a work plan outline for Phase 2 SA. ADEC concurred with some sampling modifications. ADEC gave permission to Chevron to implement SA2 and send final report to ADEC. ADEC allowed Chevron to remove soils from treatment without a work plan so long as we were notified prior.	Former Staff
4/22/1994	Update or Other Action	UPD; Thomas noted: correct property owner is Mark Neilsen, 1410 Ivan's Alley, Fairbanks, 99709.	Former Staff
5/4/1994	Update or Other Action	RPL2; ADEC\Peterson sent PRP-CS Database Notification Letter requesting update and more environmental information concerning the contaminated site. Mike Oden from UAF Risk Management Department responded with information that UAF once thought of buying site, but does not own or have any interest in the property.	Former Staff
8/22/1994	Update or Other Action	UPD; DUPEE: Thoroughly reviewed and updated file to determine status of site. Informed case officers of any outstanding actions or possible follow up that needs to be completed. Emailed case officers the results of my review.	Former Staff
1/18/1995	Update or Other Action	UPD; SITE SUMMARY: Old UST system removed in 83-84. Retroactive site assessment being done be Chevron USA. Assessment shows considerable soil & GW impact. Chevron plans to do cleanup be designing in winter of 95 an AS/SVE system for installation & operation this summer (95). Need letter of intent to clean from Chevron.	Former Staff
5/20/1996	Update or Other Action	CORR; Letter to Chevron approving the reduction in frequency of groundwater monitoring from quarterly to annually (spring time). Five quarters of data available.	Former Staff
11/20/1997	Update or Other Action	ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: CHEVRON PRODUCTS COMPANY, INC/PERMITS DESK	Former Staff
1/8/2001	Update or Other Action	Reviewed May 2000 GW Monitor report. Sent AMEC (Doug Butyne) email concerning methods used. Also questions about MTBE.	Linda Nuechterlein
1/30/2001	Update or Other Action	Annual meeting with Chevron reps to review Alaska sites and set goals for 2001.	Linda Nuechterlein
4/16/2001	Update or Other Action	Sent follow-up letter for 4/10/01 email requesting: complete CAP be submitted by 5/15/01; GW monitoring of all wells in done May 2001; and that SA report for MW install last Aug was received.	Linda Nuechterlein
6/26/2001	Leaking Underground Storage Tank Corrective Action Underway	Conditional approval letter sent for installation of remediation system. Further site characterization required during 2001 work season.	Linda Nuechterlein
7/19/2001	Update or Other Action	Received Semi-annual GW Monitor report dated 7/19/01.	Linda Nuechterlein
8/3/2001	Update or Other Action	Chevron wants to postpone installation of AS/SVE this work season due to high bid results. Letter sent to Chevron which requires that remediation system be installed during 2001 work season. DEC will consider a smaller system this year with the remainder being installed 2002. See file, email summary of meeting with Chevron.	Linda Nuechterlein
3/29/2002	Update or Other Action	SECOR removed 1,2332 tons of impacted soil during test pit investigation and overexcavation of former USTs, pump island, waste oil tank, and heating oil tank. An additional tank was discovered, removed, and overexcavated.	Janice Wiegers
3/29/2002	Release Investigation	Update: Secor characterized on and off-site impacts through 42 geoprobe borings. Water samples indicate hydrocarbon plume extends 500 feet to the west. Soil impacts detected near the former tanks. Air sparging fence (11 sparge wells) installed for possible future use. Petroleum concentrations in groundwater were: benzene of 1.6 to 6,100 ppb; GRO of up to 110 ppm; DRO up to 33 ppm.	Janice Wiegers
8/21/2002	Update or Other Action	RECKEY has automatically been generated.	Cynthia Pring-Ham
6/10/2003	Update or Other Action	System installation report submitted. Dual-phase system consisting of 4 extraction wells (EW-1 through EW-4), high vacuum extraction blower, liquid/vapor separator, oil/water separator, air stripper, 15 HP air compressor, and 4 pneumatic submersible pumps. System was tested in October 2002 and experienced problems with freezing of the air vent lines in the submersible pumps. Air pressure will be reduced to 90 lbs to counter-act. System off for winter.	Janice Wiegers
6/18/2003	Document, Report, or Work plan Review - other	Spring monitoring report submitted. Sampling and system operation is now conducted by Oasis. Five wells sampled. Maximum concentrations were 55 ppm GRO (RM-4), 17 ppm DRO (RM-4), and 3,500 ppb RRO(RM-4).	Janice Wiegers
8/1/2003	Update or Other Action	Update: System was tested in spring and was working. System turned off to complete wastewater plan and discharge permit review. The discharge is to the sanitary sewer.	Janice Wiegers
8/18/2003	Document, Report, or Work plan Review - other	Second quarter remediation status report submitted. Multi-phase extraction system started on May 23. System was shutdown on June 24 during application for a non-domestic wastewater treatment permit.	Janice Wiegers
9/8/2003	Update or Other Action	Non-domestic wastewater permit application submitted by SECOR. Application under review by ADEC engineering staff in Soldotna.	Janice Wiegers
10/17/2003	Document, Report, or Work plan Review - other	Fall groundwater monitoring report submitted. Six wells sampled: MW-5 and MW-6 have been covered with asphalt. Maximum concentrations were 170 ppm GRO and 5,000 ppb benzene (MW-4).	Janice Wiegers
12/4/2003	Update or Other Action	ADEC met with Chevron Environmental Management Company for all Fairbanks sites. Action items for next year include evaluating if plume delineation is sufficient and survey monitoring wells.	Janice Wiegers
1/28/2004	Update or Other Action	Transferred DEC staff lead from John Carnahan	Cynthia Pring-Ham
2/5/2004	Document, Report, or Work plan Review - other	Remediation system report submitted. Non-domestic wastewater permit was approved in November 2003. System startup expected in spring when temperatures are high enough for operation.	Janice Wiegers
6/25/2004	Document, Report, or Work plan Review - other	Groundwater monitoring report submitted for March 29 and 30 sampling event. Results are within historical ranges, with the highest concentrations observed at MW-7 (DRO at 20 mg/L) and RM-4 (benzene at 6 mg/L and GRO at 48 mg/L).	Janice Wiegers
1/18/2005	Document, Report, or Work plan Review - other	Groundwater monitoring report submitted for September 30 sampling event. MW-5 and MW-6 were relocated (had been under asphalt) and wells were resurveyed. MW-6 contained increased benzene levels that are not consistent with the groundwater flow direction. Based on the groundwater flow, further delineation to the southwest may be necessary.	Janice Wiegers
8/23/2005	Document, Report, or Work plan Review - other	ADEC received SECOR's Second Quarter 2005 Remediation Status Report for the Former Chevron Service Station located at 3300 College Road. SECOR concludes that the DPET system removed an estimated 26.2 pounds of GRO and 3.1 pounds of total BTEX from the soil. They recommend the DPET system operate during the third quarter.	Deborah Williams
11/21/2005	Update or Other Action	ADEC received the Third Quarter 2005 Remediatio Systems Status Report for the former Mike's Chevron station. SECOR concluded that during the third quarter of 2005, the DPET system removed an estimated 19.5 pounds of GRO and 2.9 pounds of total BTEX from soil. They recommend that the DPET system operate through the fourth quarter of 2005. To date, approximately 524.9 pounds of GRO and approximately 42.2 pounds of BTEX have been removed from the soil.	Deborah Williams
12/23/2005	Update or Other Action	ADEC reviewed Semi-Annual Groundwater Monitoring Report for the Former Chevron site. Groundwater samples were collected from MW-2, MW-4, MW-5, MW-6, MW-7, RM-1, RM-4, RM-6 and RM-7A. GRO, DRO, and BTEX results generally reduced in levels. EDB was also analyzed for and concentration exceeded ADEC cleanup levels in MW-2, MW-4, and RM-4.	Deborah Williams
2/2/2006	Document, Report, or Work plan Review - other	ADEC received the report on the 4th quarter 2005 Remediation Systems Status report for the former Mike's Chevron site. Operation of the DPET system was initiated on May 27, 2003 and taken off-line on June 24, 2003 pending receipt of the wastewater discharge permit. Full time operation of the DPET system began on September 24, 2004. For the quarter the groundwater extraction was shut down because of odor complaints. During this quarter only 1.3 pounds of BTEX was removed from the soil. The total vapor extraction to date is 524.9 pounds of GRO and 43.5 pounds of BTEX. To date, the DPET system has extracted approximately 0.6 pounds of DRO, 55.5 pounds of GRO and 3 pounds of BTEX dissolved in the groundwater and discharged approximately 114,800 gallons of groundwater.	Deborah Williams
6/13/2006	Document, Report, or Work plan Review - other	ADEC received the First Semi-annual 2006 GW Monitoring report. Groundwater flow during this event was toward the SW at a gradient of 0.002 ft/ft. GRO was detected in five of the six samples at concentrations from 24 ug/L to 27,000 ug/L. DRO was detected in all six of the samples at concentrations ranging from 340 ug/L to 11,000 ug/L. Benzene was detected in five of the six samples ranging from 0.9 ug/L to 2,900 ug/L. RM-4 and RM-6 were analyzed for EDB and results indicated 18 ug/l in RM-4 and 0.031 ug/L in RM-6. Arsenic was also detected in RM-4 at 81.8 ug/L. Napthalene was also detected in RM-4 (320 ug/L) and RM-6 (280 ug/L).	Deborah Williams
11/17/2006	Document, Report, or Work plan Review - other	ADEC received the Second-annual 2006 Groundwater Monitoring Report for the former Mike's Chevron site. Sample results from RM-4, RM-6, RM-7A, MW-2 and MW-6 were greater than applicable ADEC cleanup levels. The DPE remedial system was shutdown for 10 months prior to the sampling event. And there is no evidence of rebound in dissolved hydrocarbon concentrations. The COPC screening was conducted for two quarters in RM-4 and RM-6. As a results of the sampling, BBLES recommends eliminating the following analyses: RRO, PAHs, seven VOCs with the exception of 1,2-Dichloroethane (1,2-DCA), and the eight RCRA metals with the exception of lead and arsenic.	Deborah Williams
1/18/2007	Update or Other Action	ADEC received a report from BBL regarding the status of the remediation at the site. According to the report, during the 4th quarter of 2006, the SVE system was operational approximately 23% of the time and removed an estimated 41 pounds of gasoline range organics (GRO). The tentative schedule is for additional site assessment and/or pilot testing for the summer of 2007, a peer review with Chevron's internal technology team, and a system install (if different technology will be used) in summer of 2008. If the results of the evaluation indicate that only moderate system adjustments will be sufficient for site remediation, then the modifications will be made in 2007.	Deborah Williams
3/12/2007	Exposure Tracking Model Ranking	Initial ranking completed.	Deborah Williams
5/23/2007	Update or Other Action	ADEC received the First semi-annual 2007 Groundwater Monitoring Report. The results indicated consistent results from previous events. Concentrations of GRO, DRO, benzene, toluene, ethylbenzene, EDB and TCE were greater than the applicable ADEC groundwater cleanup levels in at least one groundwater sample.	Deborah Williams
12/20/2007	Update or Other Action	ADEC received the Second Semi-Annual 2007 Groundwater Monitoring Report. Analytical results are consistent with previous monitoring events. Concentrations of GRO, DRO, benzene , toluene, ethylbenzene, and EDB were greater than the applicable DEC cleanup level in at least one groundwater sample. ARCADIS recommends using low flow sampling techniques in monitoring wells MW-1R and MW-5 through MW-10 during the next sampling event in the spring of 2008.	Tamara Cardona-Marek
1/4/2008	Update or Other Action	DEC concurs with ARCADIS BBL's decision to do low flow sampling during the next sampling event in the spring of 2008.	Tamara Cardona-Marek
1/30/2008	Underground Storage Tank Site Characterization or Assessment	ADEC received the ARCADIS 2007 Site Assessment Report for the Former Chevron Facility 92114 (Former Mike's Chevron). Additional soil delineation took place through the analysis of 4 soil borings and the soil resulting from 5 new well installations. DRO and benzene exceeded cleanup levels in several of the soil samples. DRO, GRO, benzene, toluene and ethylbenzene cleanup levels were also exceeded in at least one of the gw samples from the newly installed wells. No exceedances were observed in well MW-10. ARCADIS recommends continuation of the semi-annual sampling program.	Tamara Cardona-Marek
6/24/2008	Update or Other Action	DEC received Arcadis First Semi-Annual 2008 groundwater Monitoring Report for former Chevron Facility 92114. Analytical results are generally consistent with previous sampling events. GRO, DRO, BTEX, TCE, EDC, Ar and Pb were greater than their ADEC cleanup level in at least one groundwater sample. Low flow sampling techniques were not able to be used during this event but will be used in the fall sampling event.	Tamara Cardona-Marek
8/29/2008	Update or Other Action	Approved transport and diposal of contaminated soil resulting from Summer 2008 drilling activities.	Tamara Cardona-Marek
9/16/2008	Update or Other Action	ADEC received the Discharge monitoring Report from the pump test performed between 8/1 and 8/5. Two effluent samples were collected no violations to the discharge permit reported. DRO ranged from 82-2500 ug/L, GRO from 100-600 ug/L and BTEX up to 300ug/L.	Tamara Cardona-Marek
12/22/2008	Update or Other Action	ADEC received the 2008 Site Assessment and Second Semi-Annual Groundwater Monitoring Report. Newly installed well MW-11 samples (soil and groundwater) contained the highest concentrations of DRO, GRO and BTEX. Arcadis concludes that the DPE system is not feasible at this location and that an AS/SVE system would be a successful remediation strategy. They also recommend continued semi-annual sampling using low flow sampling techniques.	Tamara Cardona-Marek
3/13/2009	Meeting or Teleconference Held	Arcadis held a conference call on 2/26 to discuss the status and future actions at Chevron sites. Installation of an AS system is being discussed between Arcadis and Chevron for this site. No SVE system is planned as part of this approach at this time.Drilling may start as early as June 2009.	Tamara Cardona-Marek
5/19/2009	Document, Report, or Work plan Review - other	ADEC received and reviewed the Corrective Action Plan for the Former Mike's Chevron Site. Original CAP included only air sparging. ADEC requested CAP be modified to include SVE also to prevent unknown migration of vapors. CAP will be modified to include SVE.	Tamara Cardona-Marek
5/19/2009	Update or Other Action	A request for purgewater diposal was sent to DEC and approved. Water contained GRO and benzene above cleanup levels.	Tamara Cardona-Marek
6/1/2009	Document, Report, or Work plan Review - other	ADEC received modified CAP including AS/SVE system. Proposed SVE system includes only 3 extraction wells, AS system is composed of 19 wells. ADEC is waiting for engineering review to provide comments to Arcadis.	Tamara Cardona-Marek
6/9/2009	Update or Other Action	Arcadis/ Chevron began drilling operations on site for proposed AS/SVE system. Final CAP has not been approved by DEC yet.	Tamara Cardona-Marek
6/18/2009	Document, Report, or Work plan Review - other	ADEC contacted Arcadis/ Chevron to request a modified CAP. Current CAP will not be approved as proposed, additional SVE wells are requested by ADEC.	Tamara Cardona-Marek
6/30/2009	Meeting or Teleconference Held	DEC discussed with Arcadis the modified corrective action plan for the AS/ SVE system. A new modified vesrion will be submitted sometime before July 15th. Changes have been discussed with DEC engineer and project manager. Trenching is scheduled to begin on July 7th and last for about 2 weeks. New system is scheduled to arrive on July 15th.	Tamara Cardona-Marek
6/30/2009	Offsite Soil or Groundwater Disposal Approved	Transport and disposal of waste water resulting from air knife activities atthe site is approved. 18- 55 gal drums will be transported to Anchorage and disposed by Emerald. Analytical samples indicates some of the drums contain DRO above groundwater cleanup levels.	Tamara Cardona-Marek
7/16/2009	Update or Other Action	A 1000 diesel tank (heating oil?) was found during trenching activities. Tank was found on adjacent property and it was full of fuel. Fuel will be pumped out and recycled by Emerald.	Tamara Cardona-Marek
7/31/2009	Update or Other Action	A second tank was located during removal of the first tank. Second tank was approximately 1500-2000 gal. Tank was not registered (possibly due to its age). Property owner removed tank, Arcadis screened excavation and found no contamination. Some soil contamination was detected on top of the tank prior to removal, contaminated soil was stockpiled adjacent to soil from trenching activities.	Tamara Cardona-Marek
8/20/2009	Cleanup Plan Approved	Revised 2009 Corrective Action Plan received and approved.	Tamara Cardona-Marek
10/20/2009	Update or Other Action	Soil stockpiled from tank removal (approx. 3 cubic yards) was screened by Nortech. No contamination detected, therefore no lab samples collected. All three PID levels were between 3.2-4 ppm , no visible staining or odors detected.	Tamara Cardona-Marek
12/1/2009	Document, Report, or Work plan Review - other	DEC received and reviewed the First Semi Annual 2009 Groundwater Monitoring and MNA results. Contaminant concentrations are consistent with previous low water events. Highest contamination is found in MW-11. MNA parameters suggest that anaerobic conditions are present inside and outside of the hydrocarbon plume. ORP and alkalinity measurements also indicate anaerobic biodegradation. Sulfate, ferrous iron and methane were also measured, some of these parameters were consistent with anaerobic degradation; however, additional data will need to be collected to identify trends.	Tamara Cardona-Marek
2/4/2010	Document, Report, or Work plan Review - other	DEC received and reviewed the Second Semi Annual 2009 Groundwater Monitoring and Geochemical Parameter Monitoring Report. GRO, DRO, benzene. EDB and EDC continue to be above cleanup levels in some of the wells. No other VOC's or MTBE were detected in any of the wells. Most contaminated well was MW-8. No information indicating if the AS/SVE was turned off prior to sampling. No information on the baseline MNA parameters prior to system startup.	Tamara Cardona-Marek
3/12/2010	Meeting or Teleconference Held	DEC met with Chevron and Arcadis to discuss 2010 actions. A request for no-purge sampling will be submitted. Rebound study recommended for 2010. Semi annual groundwater monitoring will continue. DEC requested a COC table and to eliminate the analysis of those that have been determined to not be present.	Tamara Cardona-Marek
5/26/2010	Update or Other Action	DEC requested that Chevron sample for sulfolane one well within the source area to determine if sulfolane may be a COC.	Tamara Cardona-Marek
7/13/2010	Offsite Soil or Groundwater Disposal Approved	Approved transport and disposal to Anchorage by Emerald of 5 gallons of purgewater.	Tamara Cardona-Marek
8/13/2010	Document, Report, or Work plan Review - other	DEC received and commented on proposed System Rebound Test Workplan submitted by Arcadis. System is expected to be shutdown to observe the effects on groundwater concentrations.	Tamara Cardona-Marek
8/25/2010	Cleanup Plan Approved	DEC approved workplan for rebound test.	Tamara Cardona-Marek
10/13/2010	Document, Report, or Work plan Review - other	DEC received the Second Quarter 2010 Remediation System Operations and Maintenance Report. System operated 64% of the planned operational period. Approximately 97 pounds of GRO were removed during this period .	Tamara Cardona-Marek
11/17/2010	Document, Report, or Work plan Review - other	DEC received the First Semi Annual 2010 Groundwater Monitoring Report. DRO exceeded cleanup levels in well RM-6. Benzene exceeded cleanup levels in wells MW-8 and RM-7A.	Tamara Cardona-Marek
2/8/2011	Document, Report, or Work plan Review - other	DEC received and reviewed the Second Semi Annual 2010 Groundwater Monitoring Report. Groundwater samples for wells MW-1R, MW-4R and RM-6 exceeded the DRO cleanup level. None of the samples exceeded the GRO cleanup level. Samples from wells MW-8 amd RM-7A exceeded the benzene cleanup level. EDB was above the cleanup level in well MW-4R. The AS/SVE system was shutdown in August/2010 to evaluate rebound. Results of this test are pending.	Tamara Cardona-Marek
2/24/2011	Meeting or Teleconference Held	DEC met with Chevron to discuss the proposed 2011 site activities. Post-rebound test groundwater sampling planned for the spring/summer. DRO contamination exceeding cleanup levels is present onsite. No offsite contamination above cleanup levels.	Tamara Cardona-Marek
3/29/2011	Document, Report, or Work plan Review - other	DEC received and reviewed the Third quarter 2010 Remediation System Operations and Maintenance Report.	Tamara Cardona-Marek
7/11/2011	Update or Other Action	DEC received a letter from Chevron informing us of the contact changes.	Tamara Cardona-Marek
11/28/2011	Document, Report, or Work plan Review - other	DEC received and reviewed the Third Quarter 2011 Remediation System Operations and Maintenance Report. A request for a second rebound test is expected.	Tamara Cardona-Marek
1/4/2012	Update or Other Action	DEC received the Air Sparge and Soil Venting System Rebound Study Shutdown Request from Arcadis. DEC approves request.	Tamara Cardona-Marek
2/21/2012	Document, Report, or Work plan Review - other	DEC received the Second Semi Annual 2011 Groundwater Monitoring Report. Some of the DRO samples were mistakenly field filtered.	Tamara Cardona-Marek
2/28/2012	Document, Report, or Work plan Review - other	DEC received and reviewed the Fourth Quarter 2011 Remediation System Operations and Maintenance Report. System was re-started from August-November 2011.	Tamara Cardona-Marek
6/19/2012	Update or Other Action	DEC received letter from Arcadis with new Chevron contact information.	Tamara Cardona-Marek
8/10/2012	Site Characterization Workplan Approved	DEC approved the vapor intrusion evaluation proposed by Arcadis. Vapor probes will be installed within the footprint of the structure planned to be built at the site to evaluate vapor intrusion potential to the new structure.	Tamara Cardona-Marek
8/14/2012	Site Visit	DEC project managers and QA/QC officer visited the site while Arcadis was sampling the vapor probes installed to evaluate for vapor intrusion potential.	Tamara Cardona-Marek
8/23/2012	Offsite Soil or Groundwater Disposal Approved	DEC approved offsite disposal of purge water produced during sampling.	Tamara Cardona-Marek
8/30/2012	Document, Report, or Work plan Review - other	DEC received and reviewed the final (revised) Soil Management Plan for the construction work that is planned to start on September 3rd.	Tamara Cardona-Marek
9/4/2012	Site Visit	Exacavation for construction of a building is ongoing. Arcadis is on site to screen and segregate any potentially contaminated soil during excavation. Excavation area seems to be as deep as 5 feet. Stockpiles have been properly placed over a liner.	Tamara Cardona-Marek
9/6/2012	Document, Report, or Work plan Review - other	DEC received and reviewed the First Semi Annual 2012 Groundwater Monitoring Report. GRO and benzene concentrations seem to have rebounded in monitoring wells MW-1R, MW-11, and RM-4. Other monitoring wells seem to have concentrations consistent with previous monitoring events.	Tamara Cardona-Marek
11/13/2012	Update or Other Action	DEC received the First Semi-annual 2012 Groundwater Monitoring Report from Arcadis.	Tamara Cardona-Marek
12/20/2012	Document, Report, or Work plan Review - other	DEC received the soil excavation report from ARCADIS. Soil was segregated into two stockpiles based on field screening with PID; the "clean" stockpile (stockpile 1) contained approximately 40 cubic yards of soil and the potentially contaminated stockpile (stockpile 2) was comprised of approximately 4 cy. Confirmation sampling from both stockpiles indicated that no contamination was present above cleanup levels. The majority of stockpile 1 was transported to the woodway and spread on their parking lot with ADEC approval. The rest was re-used on site. Stockpile 2 remains on site.	Robert Burgess
1/14/2013	Document, Report, or Work plan Review - other	DEC received and reviewed the 2013 Soil Vapor Investigation Report. The work addressed the potential for vapor intrustion at the new Pita Place restaurant on site. Soil gas probes did not detect any volatile compounds above vapor intrustion target levels. GRO was detected at 570 ug/m^3 in vapor probes VP-1 and VP-2 at a depth of 5 feet. At 10 feet, GRO was detected at 1,100 ug/m^3 in VP-1, was not detected in VP-2 and was detected at 570 ug/m^3 in VP-3. ARCADIS concluded that vapor intrusion is not a concern for the new building.	Robert Burgess
5/17/2013	Meeting or Teleconference Held	DEC project managers met via teleconference with ARCADIS project manager Russ Greisler. DEC approved of removing MW-5 and MW-7 from annual monitoring due to historical low contaminant concentrations in these wells over several years. MW-10 was damaged during Pita Place construction activities and will also be removed from the sampling regime, as it has had a long history of non-detects and is upgradient of current contamination. ARCADIS will survey the site to locate MW-10 and decommission it properly. ARCADIS proposed to restart AS/SVE system, but to leave certain legs of the system off due to low concentrations of volatile contaminants during rebound testing. DEC committed to making a decision on whether or not certain legs can remain inactive after the 2013 monitoring event.	Robert Burgess
5/29/2013	Site Visit	Site visit by DEC project manager. ARCADIS staff are conducting an evaluation of the remediation system components in anticipation of restarting the system later this summer. The contaminated soil stockpile as well as several drums containing soil cuttings and groundwater remain on site but their transport and disposal is being coordinated. Several monitoring wells in the vicinity of the new Pita Place building may have been covered by gravel. Groundwater monitoring is scheduled to take place on June 6-7.	Robert Burgess
6/10/2013	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 77720 Underground Storage Tanks Release.	Robert Burgess
2/24/2014	Document, Report, or Work plan Review - other	DEC reviewed the Second Semi-Annual 2013 Groudnwater Monitoring report. The report indicates that concentrations of benzene, GRO, and DRO have decreased below cleanup levels in most wells. Benzene and DRO were each detected above cleanup levels in a single well.	Robert Burgess
3/12/2014	Document, Report, or Work plan Review - other	DEC reviewed the Fourth Quarter 2013 Remediation System Operations and Maintenance report. The report documents decreasing rates of removal of COCs at the site.	Robert Burgess
3/21/2014	Meeting or Teleconference Held	DEC met with ARCADIS to discuss the current status of the site and future plans. ARCADIS and Chevron are trying to get a cleanup complete status by 2016. An agreement was made to eliminate lead and VOCs except for EDB from the monitoring program. It was also agreed that MW-6 and MW-7 could be removed from the monitoring program entirely, since they have not had contaminants above cleanup levels for several years. MW-5 will be kept in the monitoring program as a downgradient sentinel well. ARCADIS project manager requested the removal of the AS/SVE system at the site due to decreasing rates of contaminant removal. DEC agreed to the removal following a formal request letter. DEC also agreed to initiate a file review to assess closure needs.	Robert Burgess
5/20/2014	Update or Other Action	DEC reviewed and approved the Remediation Termination and System Transfer Request. The AS/SVE system will be decommissioned and its components will be moved to another Chevron site (FAIR Unocal, 328 1/2 Driveway St.) in Fairbanks.	Robert Burgess
10/13/2015	Document, Report, or Work plan Review - other	DEC reviewed the First Semi-Annual 2015 monitoring report. Groundwater samples indicate that significant rebound has occurred since removal of the remedial system, with some wells previously showing concentrations below cleanup levels now indicating that they contain benzene and/or GRO at concentrations well above cleanup levels. The plume appears to be small and possibly isolated to the southernmost wells on the property.	Robert Burgess
3/4/2016	Document, Report, or Work plan Review - other	DEC has reviewed the Second Semi-Annual 2015 Groundwater Monitoring Report. Contaminants in several of the on-site and off-site wells continue to exceed DEC cleanup levels but remain at significantly lower concentrations than were observed prior to installation of the remediation system. Groundwater flow direction and gradient is consistent with historical data, towards the west-southwest. Over 2 years have passed since the AS/SV remediation system was shut down. As we continue to see contaminant levels exceeding DEC cleanup levels it appears necessary to reassess the most appropriate action to move the site towards closure.	Shawn Tisdell
8/1/2016	Document, Report, or Work plan Review - other	DEC received First Semi-annual 2016 Groundwater Monitoring Report. Report reviewed and comments provided, awaiting response from consultant.	Shawn Tisdell
5/31/2017	Document, Report, or Work plan Review - other	DEC reviewed the Second Semi-Annual 2016 Groundwater Monitoring Report. The report indicates that the highest petroleum contaminant levels remain near the source area with the exception of diesel range organics (DRO) that was observed in MW-6 which is located over 500 feet west and downgradient from the source area. Groundwater flow direction and gradient is consistent with historical data, towards the west-southwest. Monitoring wells on the south and eastern property boundaries had cleanup level exceedances of DRO and benzene. A June 2017 monitoring sampling event is approved and a meeting with affiliated parties to discuss additional site characterization is requested.	Shawn Tisdell
8/14/2017	Site Visit	DEC staff observed sampling well MW-1R for DRO, GRO and BTEX. A small diameter bladder pump was used to collect samples from wells which were difficult to sample using the standard pump. Heat trace line and frost prevented water sampling from several wells during a previous attempt.	Shawn Tisdell
2/2/2018	Update or Other Action	Received 2017 Groundwater Monitoring Report for review.	Shawn Tisdell
7/18/2018	Site Visit	DEC staff observed portions of the 2018 groundwater sampling event. Several damaged well monuments were observed. Arcadis staff will document the damage and prepare to repair or remove the wells before the 2018 winter season.	Shawn Tisdell
7/25/2018	Document, Report, or Work plan Review - other	DEC staff reviewed and provided comments to the 2017 Groundwater Monitoring Report. This report suggests that contamination associated with the petroleum hydrocarbons from the former service station have decreased and are adequately assessed, and includes a request to conduct annual groundwater sampling during the second quarter of each year for nine monitoring wells and the decommissioning of two recovery system wells that are damaged and are not being used in the groundwater monitoring program. A work plan was requested by the DEC to provide details of the well decommissioning and other repairs to environmental infrastructure.	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
4/24/2020	Document, Report, or Work plan Review - other	DEC provided comments on the 2019 Annual Groundwater Monitoring Report submitted by Arcadis on December 31, 2020.	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
8/2/2021	Document, Report, or Work plan Review - other	2020 Annual Groundwater Monitoring event was conducted on July 25th & 27th, 2020. Groundwater samples were collected from monitoring wells MW-4R, MW-9, and RM-7A. Wells RM-4 and RM-6 were not accessible during this sampling event. Samples were submitted to the laboratory for GRO, DRO, BTEX, MTBE, and PAHs. Groundwater flow direction was to the south-southeast and depth to groundwater was 3.00 to 12.59 feet below ground surface.	Rebekah Reams
11/2/2021	Document, Report, or Work plan Review - other	2021 Annual Groundwater Monitoring event was conducted on July 13th, 2021. Groundwater samples were collected from monitoring wells MW-1R, MW-9, RM-4, and RM-7A using. Monitoring wells MW-4R, MW-6, MW-11, and RM-6 were obstructed by ice and could not be sampled. Monitoring well MW-7 could not be located. Samples were submitted to the laboratory for GRO, DRO, BTEX, and MTBE. Groundwater flow direction was to the west-southwest and depth to groundwater was 12.42 to 14.61 feet below ground surface.	Rebekah Reams
6/9/2022	Document, Report, or Work plan Review - other	DEC reviewed the Site Groundwater Monitoring Work Plan dated May 24, 2022. This work plan proposes to establish semi-annual sampling of site monitoring wells MW-1R, MW-2, MW-4R, MW-5, MW-6, MW-7, MW-8, MW-9, MW-11, RM-4, RM-6, and RM-7A.	Rebekah Reams
7/11/2022	Document, Report, or Work plan Review - other	DEC approved the Revised Site Groundwater Monitoring Work Plan with the condition that a well survey be completed during the two-year period the work plan is in place due to the length of time since the most recent survey was completed and with consideration for the presence of permafrost at the site that may impact site wells. This work plan proposes to establish semi-annual sampling of site monitoring wells MW-1R, MW-2, MW-4R, MW-5, MW-6, MW-7, MW-8, MW-9, MW-11, RM-4, RM-6, and RM-7A.	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
8/4/2023	Long Term Monitoring Workplan or Report Review	ADEC approved the Groundwater Analyte Reduction Request and Well Repair Work Plan following comment resolution. This work plan proposes to repair or replace damaged site wells and update the analytes included in the sampling plan.	Rebekah Reams
8/7/2023	Long Term Monitoring Workplan or Report Review	2023 First Semi-Annual Groundwater Monitoring event was conducted on June 11th, 2023. Groundwater samples were collected from monitoring wells MW-4R, MW-5, MW-7, MW-8, MW-9, MW-11, RM-4, and RM-7A. Monitoring wells MW-1R, MW-2, MW-6, and RM-6 were obstructed and were not gauged or sampled. Samples were submitted to the laboratory for GRO, DRO, VOCs, and PAHs. Groundwater flow direction was to the south-southeast and depth to groundwater was 11.82 to 14.15 feet below ground surface.	Rebekah Reams
10/12/2023	Offsite Soil or Groundwater Disposal Approved	ADEC approved transport of two 55-gallon drums of water and one 55-gallons of soil investigation derived waste.	Rebekah Reams
11/1/2023	Document, Report, or Work plan Review - other	ADEC approved the Addendum to Groundwater Analyte Adjustment Request and Well Repair Work Plan - Revision 2 which proposes to decommission air sparge/soil vapor extraction (AS/SVE) wells EW-1 through EW-4, SV-2, AS-4, AS-8 through AS-11, and AS-14 through AS-17 that were associated with the AS/SVE system that was decommissioned and removed from the site in 2014.	Rebekah Reams
1/12/2024	Long Term Monitoring Workplan or Report Review	2023 Second Semi-Annual Groundwater Monitoring event was conducted on October 8th, 2023. Groundwater samples were collected from monitoring wells MW-1R, MW-4R, MW-5, MW-6R, MW-7, MW-8, MW-9, MW-11, RM-4, and RM-7A. Monitoring well MW-2 was obstructed. RM-6R could not be located under snow and ice. Samples were submitted to the laboratory for GRO, DRO, lead and select VOCs and PAHs. Groundwater flow direction was to the south-southeast and depth to groundwater was 11.87 to 13.90 feet below ground surface.	Rebekah Reams
9/9/2024	Offsite Soil or Groundwater Disposal Approved	ADEC approved offsite transport of 20 gallons of decontamination and purge water generated June 2024	Rebekah Reams
9/25/2024	Meeting or Teleconference Held	ADEC staff met with Chevron and their consultant for an annual portfolio meeting to discuss site status, upcoming document submittals, pending reviews, and general updates for Chevron's contaminated sites throughout the state.	Rebekah Reams
11/7/2024	Long Term Monitoring Workplan or Report Review	2024 First Semi-Annual Groundwater Monitoring event was conducted on June 2nd, 2024. Groundwater samples were collected from monitoring wells MW-4R, MW-6R, MW-9, MW-11, RM-4, RM-6A, and RM-7A. Monitoring wells MW-1R and MW-5 were frozen and were not gauged or sampled. Samples were submitted to the laboratory for GRO, DRO, VOCs, PAHs, lead, and arsenic. Groundwater flow direction was to the south-southeast and depth to groundwater was 13.02 to 15.43 feet below ground surface.	Rebekah Reams
11/14/2024	Document, Report, or Work plan Review - other	ADEC reviewed the 2023 Well Decommissioning and Installation Report which documents the redevelopment of MW-4R and RM-4, the decommissioning and replacement of MW-6 and RM-6, and the decommissioning of former air sparge well AS-13. Soil samples collected during the installation of replacement wells MW-6R and RM-6R reported all results below cleanup levels with the exception of arsenic and chromium which were attributed to naturally occurring background concentrations. Groundwater samples collected from the repaired wells RM-4 and MW-4R reported several analytes above cleanup levels and new replacement wells RM-6R and MW-6R were below cleanup levels for all analytes. All site wells were surveyed during this field work.	Rebekah Reams
11/15/2024	Long Term Monitoring Workplan or Report Review	2024 Second Semi-Annual Groundwater Monitoring event was conducted on September 16 and 17, 2024. Groundwater samples were collected from monitoring wells MW-4R, MW-6R, MW-9, MW-11, RM-4, RM-6R, and RM-7A. Monitoring well MW-1R was not sampled or gauged due to ponding water in the parking lot that submerged the well vault. Samples were submitted to the laboratory for GRO, DRO, select VOCs and PAHs, lead, and arsenic. Groundwater flow direction was to the south and depth to groundwater was 10.91 to 13.03 feet below ground surface.	Rebekah Reams

Action Date

Action

Description

DEC Staff

3/25/1992

Site Visit

FI; Soil contamination: diesel range = 590-820ppm, gasoline range = 1700-10,000ppm. Chemist thinks may be "mineral spirits or stoddard solvent. Groundwater contamination: benzene = 240-3200ppb, toluene = 130-32,000ppb, e.benzene = 20-1800ppb, xylenes = 358-3300ppb.

Former Staff

5/12/1992

Site Added to Database

Former Staff

5/12/1992

Leaking Underground Storage Tank Release Confirmed - Petroleum

LUST Site created in CSP for source area ID 77720 ADD;

Former Staff

5/13/1992

Leaking Underground Storage Tank Cleanup Initiated - Petroleum

LCAU; Action Date is estimated for summer of 1996 for the removal of three USTs (see Site Assessment, August 1993). Gas Station Facility was removed in 1986. Six soil borings in 1993 confirmed soil and groundwater contamination. : LCAU date changed DB conversion

Former Staff

6/1/1993

Underground Storage Tank Site Characterization or Assessment

SA1; Thomas reports: Site Assessment undertaken by RZA AGRA for Chevron USA. Assessment included the boring of six holes and the installation of 3 monitor wells. Benzene identified in ground water from 230 to 26,000 ppb. Soil contamination also noted. Service station and tanks were removed from site in 1986. Some private wells may exist in the area.

Former Staff

11/18/1993

Underground Storage Tank Site Characterization or Assessment

SA1R; Thomas reports: Site Assessment reviewed and determined satisfactory. Cover letter of SA stated intent of Chevron to proceed with additional investigation. ADEC sent written response concurring with action. ADEC suggested source removal of contaminated soils in summer 1994. ADEC will wait for next assessment phase report.

Former Staff

4/22/1994

Update or Other Action

CORR; Thomas received and reviewed letter of intent from Chevron. Chevron plans to address ADEC's concerns about source removal. Chevron also submitted a work plan outline for Phase 2 SA. ADEC concurred with some sampling modifications. ADEC gave permission to Chevron to implement SA2 and send final report to ADEC. ADEC allowed Chevron to remove soils from treatment without a work plan so long as we were notified prior.

Former Staff

4/22/1994

Update or Other Action

UPD; Thomas noted: correct property owner is Mark Neilsen, 1410 Ivan's Alley, Fairbanks, 99709.

Former Staff

5/4/1994

Update or Other Action

RPL2; ADEC\Peterson sent PRP-CS Database Notification Letter requesting update and more environmental information concerning the contaminated site. Mike Oden from UAF Risk Management Department responded with information that UAF once thought of buying site, but does not own or have any interest in the property.

Former Staff

8/22/1994

Update or Other Action

UPD; DUPEE: Thoroughly reviewed and updated file to determine status of site. Informed case officers of any outstanding actions or possible follow up that needs to be completed. Emailed case officers the results of my review.

Former Staff

1/18/1995

Update or Other Action

UPD; SITE SUMMARY: Old UST system removed in 83-84. Retroactive site assessment being done be Chevron USA. Assessment shows considerable soil & GW impact. Chevron plans to do cleanup be designing in winter of 95 an AS/SVE system for installation & operation this summer (95). Need letter of intent to clean from Chevron.

Former Staff

5/20/1996

Update or Other Action

CORR; Letter to Chevron approving the reduction in frequency of groundwater monitoring from quarterly to annually (spring time). Five quarters of data available.

Former Staff

11/20/1997

Update or Other Action

ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: CHEVRON PRODUCTS COMPANY, INC/PERMITS DESK

Former Staff

1/8/2001

Update or Other Action

Reviewed May 2000 GW Monitor report. Sent AMEC (Doug Butyne) email concerning methods used. Also questions about MTBE.

Linda Nuechterlein

1/30/2001

Update or Other Action

Annual meeting with Chevron reps to review Alaska sites and set goals for 2001.

Linda Nuechterlein

4/16/2001

Update or Other Action

Sent follow-up letter for 4/10/01 email requesting: complete CAP be submitted by 5/15/01; GW monitoring of all wells in done May 2001; and that SA report for MW install last Aug was received.

Linda Nuechterlein

6/26/2001

Leaking Underground Storage Tank Corrective Action Underway

Conditional approval letter sent for installation of remediation system. Further site characterization required during 2001 work season.

Linda Nuechterlein

7/19/2001

Update or Other Action

Received Semi-annual GW Monitor report dated 7/19/01.

Linda Nuechterlein

8/3/2001

Update or Other Action

Chevron wants to postpone installation of AS/SVE this work season due to high bid results. Letter sent to Chevron which requires that remediation system be installed during 2001 work season. DEC will consider a smaller system this year with the remainder being installed 2002. See file, email summary of meeting with Chevron.

Linda Nuechterlein

3/29/2002

Update or Other Action

SECOR removed 1,2332 tons of impacted soil during test pit investigation and overexcavation of former USTs, pump island, waste oil tank, and heating oil tank. An additional tank was discovered, removed, and overexcavated.

Janice Wiegers

3/29/2002

Release Investigation

Update: Secor characterized on and off-site impacts through 42 geoprobe borings. Water samples indicate hydrocarbon plume extends 500 feet to the west. Soil impacts detected near the former tanks. Air sparging fence (11 sparge wells) installed for possible future use. Petroleum concentrations in groundwater were: benzene of 1.6 to 6,100 ppb; GRO of up to 110 ppm; DRO up to 33 ppm.

Janice Wiegers

8/21/2002

Update or Other Action

RECKEY has automatically been generated.

Cynthia Pring-Ham

6/10/2003

Update or Other Action

System installation report submitted. Dual-phase system consisting of 4 extraction wells (EW-1 through EW-4), high vacuum extraction blower, liquid/vapor separator, oil/water separator, air stripper, 15 HP air compressor, and 4 pneumatic submersible pumps. System was tested in October 2002 and experienced problems with freezing of the air vent lines in the submersible pumps. Air pressure will be reduced to 90 lbs to counter-act. System off for winter.

Janice Wiegers

6/18/2003

Document, Report, or Work plan Review - other

Spring monitoring report submitted. Sampling and system operation is now conducted by Oasis. Five wells sampled. Maximum concentrations were 55 ppm GRO (RM-4), 17 ppm DRO (RM-4), and 3,500 ppb RRO(RM-4).

Janice Wiegers

8/1/2003

Update or Other Action

Update: System was tested in spring and was working. System turned off to complete wastewater plan and discharge permit review. The discharge is to the sanitary sewer.

Janice Wiegers

8/18/2003

Document, Report, or Work plan Review - other

Second quarter remediation status report submitted. Multi-phase extraction system started on May 23. System was shutdown on June 24 during application for a non-domestic wastewater treatment permit.

Janice Wiegers

9/8/2003

Update or Other Action

Non-domestic wastewater permit application submitted by SECOR. Application under review by ADEC engineering staff in Soldotna.

Janice Wiegers

10/17/2003

Document, Report, or Work plan Review - other

Fall groundwater monitoring report submitted. Six wells sampled: MW-5 and MW-6 have been covered with asphalt. Maximum concentrations were 170 ppm GRO and 5,000 ppb benzene (MW-4).

Janice Wiegers

12/4/2003

Update or Other Action

ADEC met with Chevron Environmental Management Company for all Fairbanks sites. Action items for next year include evaluating if plume delineation is sufficient and survey monitoring wells.

Janice Wiegers

1/28/2004

Update or Other Action

Transferred DEC staff lead from John Carnahan

Cynthia Pring-Ham

2/5/2004

Document, Report, or Work plan Review - other

Remediation system report submitted. Non-domestic wastewater permit was approved in November 2003. System startup expected in spring when temperatures are high enough for operation.

Janice Wiegers

6/25/2004

Document, Report, or Work plan Review - other

Groundwater monitoring report submitted for March 29 and 30 sampling event. Results are within historical ranges, with the highest concentrations observed at MW-7 (DRO at 20 mg/L) and RM-4 (benzene at 6 mg/L and GRO at 48 mg/L).

Janice Wiegers

1/18/2005

Document, Report, or Work plan Review - other

Groundwater monitoring report submitted for September 30 sampling event. MW-5 and MW-6 were relocated (had been under asphalt) and wells were resurveyed. MW-6 contained increased benzene levels that are not consistent with the groundwater flow direction. Based on the groundwater flow, further delineation to the southwest may be necessary.

Janice Wiegers

8/23/2005

Document, Report, or Work plan Review - other

ADEC received SECOR's Second Quarter 2005 Remediation Status Report for the Former Chevron Service Station located at 3300 College Road. SECOR concludes that the DPET system removed an estimated 26.2 pounds of GRO and 3.1 pounds of total BTEX from the soil. They recommend the DPET system operate during the third quarter.

Deborah Williams

11/21/2005

Update or Other Action

ADEC received the Third Quarter 2005 Remediatio Systems Status Report for the former Mike's Chevron station. SECOR concluded that during the third quarter of 2005, the DPET system removed an estimated 19.5 pounds of GRO and 2.9 pounds of total BTEX from soil. They recommend that the DPET system operate through the fourth quarter of 2005. To date, approximately 524.9 pounds of GRO and approximately 42.2 pounds of BTEX have been removed from the soil.

Deborah Williams

12/23/2005

Update or Other Action

ADEC reviewed Semi-Annual Groundwater Monitoring Report for the Former Chevron site. Groundwater samples were collected from MW-2, MW-4, MW-5, MW-6, MW-7, RM-1, RM-4, RM-6 and RM-7A. GRO, DRO, and BTEX results generally reduced in levels. EDB was also analyzed for and concentration exceeded ADEC cleanup levels in MW-2, MW-4, and RM-4.

Deborah Williams

2/2/2006

Document, Report, or Work plan Review - other

ADEC received the report on the 4th quarter 2005 Remediation Systems Status report for the former Mike's Chevron site. Operation of the DPET system was initiated on May 27, 2003 and taken off-line on June 24, 2003 pending receipt of the wastewater discharge permit. Full time operation of the DPET system began on September 24, 2004. For the quarter the groundwater extraction was shut down because of odor complaints. During this quarter only 1.3 pounds of BTEX was removed from the soil. The total vapor extraction to date is 524.9 pounds of GRO and 43.5 pounds of BTEX. To date, the DPET system has extracted approximately 0.6 pounds of DRO, 55.5 pounds of GRO and 3 pounds of BTEX dissolved in the groundwater and discharged approximately 114,800 gallons of groundwater.

Deborah Williams

6/13/2006

Document, Report, or Work plan Review - other

ADEC received the First Semi-annual 2006 GW Monitoring report. Groundwater flow during this event was toward the SW at a gradient of 0.002 ft/ft. GRO was detected in five of the six samples at concentrations from 24 ug/L to 27,000 ug/L. DRO was detected in all six of the samples at concentrations ranging from 340 ug/L to 11,000 ug/L. Benzene was detected in five of the six samples ranging from 0.9 ug/L to 2,900 ug/L. RM-4 and RM-6 were analyzed for EDB and results indicated 18 ug/l in RM-4 and 0.031 ug/L in RM-6. Arsenic was also detected in RM-4 at 81.8 ug/L. Napthalene was also detected in RM-4 (320 ug/L) and RM-6 (280 ug/L).

Deborah Williams

11/17/2006

Document, Report, or Work plan Review - other

ADEC received the Second-annual 2006 Groundwater Monitoring Report for the former Mike's Chevron site. Sample results from RM-4, RM-6, RM-7A, MW-2 and MW-6 were greater than applicable ADEC cleanup levels. The DPE remedial system was shutdown for 10 months prior to the sampling event. And there is no evidence of rebound in dissolved hydrocarbon concentrations. The COPC screening was conducted for two quarters in RM-4 and RM-6. As a results of the sampling, BBLES recommends eliminating the following analyses: RRO, PAHs, seven VOCs with the exception of 1,2-Dichloroethane (1,2-DCA), and the eight RCRA metals with the exception of lead and arsenic.

Deborah Williams

1/18/2007

Update or Other Action

ADEC received a report from BBL regarding the status of the remediation at the site. According to the report, during the 4th quarter of 2006, the SVE system was operational approximately 23% of the time and removed an estimated 41 pounds of gasoline range organics (GRO). The tentative schedule is for additional site assessment and/or pilot testing for the summer of 2007, a peer review with Chevron's internal technology team, and a system install (if different technology will be used) in summer of 2008. If the results of the evaluation indicate that only moderate system adjustments will be sufficient for site remediation, then the modifications will be made in 2007.

Deborah Williams

3/12/2007

Exposure Tracking Model Ranking

Initial ranking completed.

Deborah Williams

5/23/2007

Update or Other Action

ADEC received the First semi-annual 2007 Groundwater Monitoring Report. The results indicated consistent results from previous events. Concentrations of GRO, DRO, benzene, toluene, ethylbenzene, EDB and TCE were greater than the applicable ADEC groundwater cleanup levels in at least one groundwater sample.

Deborah Williams

12/20/2007

Update or Other Action

ADEC received the Second Semi-Annual 2007 Groundwater Monitoring Report. Analytical results are consistent with previous monitoring events. Concentrations of GRO, DRO, benzene , toluene, ethylbenzene, and EDB were greater than the applicable DEC cleanup level in at least one groundwater sample. ARCADIS recommends using low flow sampling techniques in monitoring wells MW-1R and MW-5 through MW-10 during the next sampling event in the spring of 2008.

Tamara Cardona-Marek

1/4/2008

Update or Other Action

DEC concurs with ARCADIS BBL's decision to do low flow sampling during the next sampling event in the spring of 2008.

Tamara Cardona-Marek

1/30/2008

Underground Storage Tank Site Characterization or Assessment

ADEC received the ARCADIS 2007 Site Assessment Report for the Former Chevron Facility 92114 (Former Mike's Chevron). Additional soil delineation took place through the analysis of 4 soil borings and the soil resulting from 5 new well installations. DRO and benzene exceeded cleanup levels in several of the soil samples. DRO, GRO, benzene, toluene and ethylbenzene cleanup levels were also exceeded in at least one of the gw samples from the newly installed wells. No exceedances were observed in well MW-10. ARCADIS recommends continuation of the semi-annual sampling program.

Tamara Cardona-Marek

6/24/2008

Update or Other Action

DEC received Arcadis First Semi-Annual 2008 groundwater Monitoring Report for former Chevron Facility 92114. Analytical results are generally consistent with previous sampling events. GRO, DRO, BTEX, TCE, EDC, Ar and Pb were greater than their ADEC cleanup level in at least one groundwater sample. Low flow sampling techniques were not able to be used during this event but will be used in the fall sampling event.

Tamara Cardona-Marek

8/29/2008

Update or Other Action

Approved transport and diposal of contaminated soil resulting from Summer 2008 drilling activities.

Tamara Cardona-Marek

9/16/2008

Update or Other Action

ADEC received the Discharge monitoring Report from the pump test performed between 8/1 and 8/5. Two effluent samples were collected no violations to the discharge permit reported. DRO ranged from 82-2500 ug/L, GRO from 100-600 ug/L and BTEX up to 300ug/L.

Tamara Cardona-Marek

12/22/2008

Update or Other Action

ADEC received the 2008 Site Assessment and Second Semi-Annual Groundwater Monitoring Report. Newly installed well MW-11 samples (soil and groundwater) contained the highest concentrations of DRO, GRO and BTEX. Arcadis concludes that the DPE system is not feasible at this location and that an AS/SVE system would be a successful remediation strategy. They also recommend continued semi-annual sampling using low flow sampling techniques.

Tamara Cardona-Marek

3/13/2009

Meeting or Teleconference Held

Arcadis held a conference call on 2/26 to discuss the status and future actions at Chevron sites. Installation of an AS system is being discussed between Arcadis and Chevron for this site. No SVE system is planned as part of this approach at this time.Drilling may start as early as June 2009.

Tamara Cardona-Marek

5/19/2009

Document, Report, or Work plan Review - other

ADEC received and reviewed the Corrective Action Plan for the Former Mike's Chevron Site. Original CAP included only air sparging. ADEC requested CAP be modified to include SVE also to prevent unknown migration of vapors. CAP will be modified to include SVE.

Tamara Cardona-Marek

5/19/2009

Update or Other Action

A request for purgewater diposal was sent to DEC and approved. Water contained GRO and benzene above cleanup levels.

Tamara Cardona-Marek

6/1/2009

Document, Report, or Work plan Review - other

ADEC received modified CAP including AS/SVE system. Proposed SVE system includes only 3 extraction wells, AS system is composed of 19 wells. ADEC is waiting for engineering review to provide comments to Arcadis.

Tamara Cardona-Marek

6/9/2009

Update or Other Action

Arcadis/ Chevron began drilling operations on site for proposed AS/SVE system. Final CAP has not been approved by DEC yet.

Tamara Cardona-Marek

6/18/2009

Document, Report, or Work plan Review - other

ADEC contacted Arcadis/ Chevron to request a modified CAP. Current CAP will not be approved as proposed, additional SVE wells are requested by ADEC.

Tamara Cardona-Marek

6/30/2009

Meeting or Teleconference Held

DEC discussed with Arcadis the modified corrective action plan for the AS/ SVE system. A new modified vesrion will be submitted sometime before July 15th. Changes have been discussed with DEC engineer and project manager. Trenching is scheduled to begin on July 7th and last for about 2 weeks. New system is scheduled to arrive on July 15th.

Tamara Cardona-Marek

6/30/2009

Offsite Soil or Groundwater Disposal Approved

Transport and disposal of waste water resulting from air knife activities atthe site is approved. 18- 55 gal drums will be transported to Anchorage and disposed by Emerald. Analytical samples indicates some of the drums contain DRO above groundwater cleanup levels.

Tamara Cardona-Marek

7/16/2009

Update or Other Action

A 1000 diesel tank (heating oil?) was found during trenching activities. Tank was found on adjacent property and it was full of fuel. Fuel will be pumped out and recycled by Emerald.

Tamara Cardona-Marek

7/31/2009

Update or Other Action

A second tank was located during removal of the first tank. Second tank was approximately 1500-2000 gal. Tank was not registered (possibly due to its age). Property owner removed tank, Arcadis screened excavation and found no contamination. Some soil contamination was detected on top of the tank prior to removal, contaminated soil was stockpiled adjacent to soil from trenching activities.

Tamara Cardona-Marek

8/20/2009

Cleanup Plan Approved

Revised 2009 Corrective Action Plan received and approved.

Tamara Cardona-Marek

10/20/2009

Update or Other Action

Soil stockpiled from tank removal (approx. 3 cubic yards) was screened by Nortech. No contamination detected, therefore no lab samples collected. All three PID levels were between 3.2-4 ppm , no visible staining or odors detected.

Tamara Cardona-Marek

12/1/2009

Document, Report, or Work plan Review - other

DEC received and reviewed the First Semi Annual 2009 Groundwater Monitoring and MNA results. Contaminant concentrations are consistent with previous low water events. Highest contamination is found in MW-11. MNA parameters suggest that anaerobic conditions are present inside and outside of the hydrocarbon plume. ORP and alkalinity measurements also indicate anaerobic biodegradation. Sulfate, ferrous iron and methane were also measured, some of these parameters were consistent with anaerobic degradation; however, additional data will need to be collected to identify trends.

Tamara Cardona-Marek

2/4/2010

Document, Report, or Work plan Review - other

DEC received and reviewed the Second Semi Annual 2009 Groundwater Monitoring and Geochemical Parameter Monitoring Report. GRO, DRO, benzene. EDB and EDC continue to be above cleanup levels in some of the wells. No other VOC's or MTBE were detected in any of the wells. Most contaminated well was MW-8. No information indicating if the AS/SVE was turned off prior to sampling. No information on the baseline MNA parameters prior to system startup.

Tamara Cardona-Marek

3/12/2010

Meeting or Teleconference Held

DEC met with Chevron and Arcadis to discuss 2010 actions. A request for no-purge sampling will be submitted. Rebound study recommended for 2010. Semi annual groundwater monitoring will continue. DEC requested a COC table and to eliminate the analysis of those that have been determined to not be present.

Tamara Cardona-Marek

5/26/2010

Update or Other Action

DEC requested that Chevron sample for sulfolane one well within the source area to determine if sulfolane may be a COC.

Tamara Cardona-Marek

7/13/2010

Offsite Soil or Groundwater Disposal Approved

Approved transport and disposal to Anchorage by Emerald of 5 gallons of purgewater.

Tamara Cardona-Marek

8/13/2010

Document, Report, or Work plan Review - other

DEC received and commented on proposed System Rebound Test Workplan submitted by Arcadis. System is expected to be shutdown to observe the effects on groundwater concentrations.

Tamara Cardona-Marek

8/25/2010

Cleanup Plan Approved

DEC approved workplan for rebound test.

Tamara Cardona-Marek

10/13/2010

Document, Report, or Work plan Review - other

DEC received the Second Quarter 2010 Remediation System Operations and Maintenance Report. System operated 64% of the planned operational period. Approximately 97 pounds of GRO were removed during this period .

Tamara Cardona-Marek

11/17/2010

Document, Report, or Work plan Review - other

DEC received the First Semi Annual 2010 Groundwater Monitoring Report. DRO exceeded cleanup levels in well RM-6. Benzene exceeded cleanup levels in wells MW-8 and RM-7A.

Tamara Cardona-Marek

2/8/2011

Document, Report, or Work plan Review - other

DEC received and reviewed the Second Semi Annual 2010 Groundwater Monitoring Report. Groundwater samples for wells MW-1R, MW-4R and RM-6 exceeded the DRO cleanup level. None of the samples exceeded the GRO cleanup level. Samples from wells MW-8 amd RM-7A exceeded the benzene cleanup level. EDB was above the cleanup level in well MW-4R. The AS/SVE system was shutdown in August/2010 to evaluate rebound. Results of this test are pending.

Tamara Cardona-Marek

2/24/2011

Meeting or Teleconference Held

DEC met with Chevron to discuss the proposed 2011 site activities. Post-rebound test groundwater sampling planned for the spring/summer. DRO contamination exceeding cleanup levels is present onsite. No offsite contamination above cleanup levels.

Tamara Cardona-Marek

3/29/2011

Document, Report, or Work plan Review - other

DEC received and reviewed the Third quarter 2010 Remediation System Operations and Maintenance Report.

Tamara Cardona-Marek

7/11/2011

Update or Other Action

DEC received a letter from Chevron informing us of the contact changes.

Tamara Cardona-Marek

11/28/2011

Document, Report, or Work plan Review - other

DEC received and reviewed the Third Quarter 2011 Remediation System Operations and Maintenance Report. A request for a second rebound test is expected.

Tamara Cardona-Marek

1/4/2012

Update or Other Action

DEC received the Air Sparge and Soil Venting System Rebound Study Shutdown Request from Arcadis. DEC approves request.

Tamara Cardona-Marek

2/21/2012

Document, Report, or Work plan Review - other

DEC received the Second Semi Annual 2011 Groundwater Monitoring Report. Some of the DRO samples were mistakenly field filtered.

Tamara Cardona-Marek

2/28/2012

Document, Report, or Work plan Review - other

DEC received and reviewed the Fourth Quarter 2011 Remediation System Operations and Maintenance Report. System was re-started from August-November 2011.

Tamara Cardona-Marek

6/19/2012

Update or Other Action

DEC received letter from Arcadis with new Chevron contact information.

Tamara Cardona-Marek

8/10/2012

Site Characterization Workplan Approved

DEC approved the vapor intrusion evaluation proposed by Arcadis. Vapor probes will be installed within the footprint of the structure planned to be built at the site to evaluate vapor intrusion potential to the new structure.

Tamara Cardona-Marek

8/14/2012

Site Visit

DEC project managers and QA/QC officer visited the site while Arcadis was sampling the vapor probes installed to evaluate for vapor intrusion potential.

Tamara Cardona-Marek

8/23/2012

Offsite Soil or Groundwater Disposal Approved

DEC approved offsite disposal of purge water produced during sampling.

Tamara Cardona-Marek

8/30/2012

Document, Report, or Work plan Review - other

DEC received and reviewed the final (revised) Soil Management Plan for the construction work that is planned to start on September 3rd.

Tamara Cardona-Marek

9/4/2012

Site Visit

Exacavation for construction of a building is ongoing. Arcadis is on site to screen and segregate any potentially contaminated soil during excavation. Excavation area seems to be as deep as 5 feet. Stockpiles have been properly placed over a liner.

Tamara Cardona-Marek

9/6/2012

Document, Report, or Work plan Review - other

DEC received and reviewed the First Semi Annual 2012 Groundwater Monitoring Report. GRO and benzene concentrations seem to have rebounded in monitoring wells MW-1R, MW-11, and RM-4. Other monitoring wells seem to have concentrations consistent with previous monitoring events.

Tamara Cardona-Marek

11/13/2012

Update or Other Action

DEC received the First Semi-annual 2012 Groundwater Monitoring Report from Arcadis.

Tamara Cardona-Marek

12/20/2012

Document, Report, or Work plan Review - other

DEC received the soil excavation report from ARCADIS. Soil was segregated into two stockpiles based on field screening with PID; the "clean" stockpile (stockpile 1) contained approximately 40 cubic yards of soil and the potentially contaminated stockpile (stockpile 2) was comprised of approximately 4 cy. Confirmation sampling from both stockpiles indicated that no contamination was present above cleanup levels. The majority of stockpile 1 was transported to the woodway and spread on their parking lot with ADEC approval. The rest was re-used on site. Stockpile 2 remains on site.

Robert Burgess

1/14/2013

Document, Report, or Work plan Review - other

DEC received and reviewed the 2013 Soil Vapor Investigation Report. The work addressed the potential for vapor intrustion at the new Pita Place restaurant on site. Soil gas probes did not detect any volatile compounds above vapor intrustion target levels. GRO was detected at 570 ug/m^3 in vapor probes VP-1 and VP-2 at a depth of 5 feet. At 10 feet, GRO was detected at 1,100 ug/m^3 in VP-1, was not detected in VP-2 and was detected at 570 ug/m^3 in VP-3. ARCADIS concluded that vapor intrusion is not a concern for the new building.

Robert Burgess

5/17/2013

Meeting or Teleconference Held

DEC project managers met via teleconference with ARCADIS project manager Russ Greisler. DEC approved of removing MW-5 and MW-7 from annual monitoring due to historical low contaminant concentrations in these wells over several years. MW-10 was damaged during Pita Place construction activities and will also be removed from the sampling regime, as it has had a long history of non-detects and is upgradient of current contamination. ARCADIS will survey the site to locate MW-10 and decommission it properly. ARCADIS proposed to restart AS/SVE system, but to leave certain legs of the system off due to low concentrations of volatile contaminants during rebound testing. DEC committed to making a decision on whether or not certain legs can remain inactive after the 2013 monitoring event.

Robert Burgess

5/29/2013

Site Visit

Site visit by DEC project manager. ARCADIS staff are conducting an evaluation of the remediation system components in anticipation of restarting the system later this summer. The contaminated soil stockpile as well as several drums containing soil cuttings and groundwater remain on site but their transport and disposal is being coordinated. Several monitoring wells in the vicinity of the new Pita Place building may have been covered by gravel. Groundwater monitoring is scheduled to take place on June 6-7.

Robert Burgess

6/10/2013

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 77720 Underground Storage Tanks Release.

Robert Burgess

2/24/2014

Document, Report, or Work plan Review - other

DEC reviewed the Second Semi-Annual 2013 Groudnwater Monitoring report. The report indicates that concentrations of benzene, GRO, and DRO have decreased below cleanup levels in most wells. Benzene and DRO were each detected above cleanup levels in a single well.

Robert Burgess

3/12/2014

Document, Report, or Work plan Review - other

DEC reviewed the Fourth Quarter 2013 Remediation System Operations and Maintenance report. The report documents decreasing rates of removal of COCs at the site.

Robert Burgess

3/21/2014

Meeting or Teleconference Held

DEC met with ARCADIS to discuss the current status of the site and future plans. ARCADIS and Chevron are trying to get a cleanup complete status by 2016. An agreement was made to eliminate lead and VOCs except for EDB from the monitoring program. It was also agreed that MW-6 and MW-7 could be removed from the monitoring program entirely, since they have not had contaminants above cleanup levels for several years. MW-5 will be kept in the monitoring program as a downgradient sentinel well. ARCADIS project manager requested the removal of the AS/SVE system at the site due to decreasing rates of contaminant removal. DEC agreed to the removal following a formal request letter. DEC also agreed to initiate a file review to assess closure needs.

Robert Burgess

5/20/2014

Update or Other Action

DEC reviewed and approved the Remediation Termination and System Transfer Request. The AS/SVE system will be decommissioned and its components will be moved to another Chevron site (FAIR Unocal, 328 1/2 Driveway St.) in Fairbanks.

Robert Burgess

10/13/2015

Document, Report, or Work plan Review - other

DEC reviewed the First Semi-Annual 2015 monitoring report. Groundwater samples indicate that significant rebound has occurred since removal of the remedial system, with some wells previously showing concentrations below cleanup levels now indicating that they contain benzene and/or GRO at concentrations well above cleanup levels. The plume appears to be small and possibly isolated to the southernmost wells on the property.

Robert Burgess

3/4/2016

Document, Report, or Work plan Review - other

DEC has reviewed the Second Semi-Annual 2015 Groundwater Monitoring Report. Contaminants in several of the on-site and off-site wells continue to exceed DEC cleanup levels but remain at significantly lower concentrations than were observed prior to installation of the remediation system. Groundwater flow direction and gradient is consistent with historical data, towards the west-southwest. Over 2 years have passed since the AS/SV remediation system was shut down. As we continue to see contaminant levels exceeding DEC cleanup levels it appears necessary to reassess the most appropriate action to move the site towards closure.

Shawn Tisdell

8/1/2016

Document, Report, or Work plan Review - other

DEC received First Semi-annual 2016 Groundwater Monitoring Report. Report reviewed and comments provided, awaiting response from consultant.

Shawn Tisdell

5/31/2017

Document, Report, or Work plan Review - other

DEC reviewed the Second Semi-Annual 2016 Groundwater Monitoring Report. The report indicates that the highest petroleum contaminant levels remain near the source area with the exception of diesel range organics (DRO) that was observed in MW-6 which is located over 500 feet west and downgradient from the source area. Groundwater flow direction and gradient is consistent with historical data, towards the west-southwest. Monitoring wells on the south and eastern property boundaries had cleanup level exceedances of DRO and benzene. A June 2017 monitoring sampling event is approved and a meeting with affiliated parties to discuss additional site characterization is requested.

Shawn Tisdell

8/14/2017

Site Visit

DEC staff observed sampling well MW-1R for DRO, GRO and BTEX. A small diameter bladder pump was used to collect samples from wells which were difficult to sample using the standard pump. Heat trace line and frost prevented water sampling from several wells during a previous attempt.

Shawn Tisdell

2/2/2018

Update or Other Action

Received 2017 Groundwater Monitoring Report for review.

Shawn Tisdell

7/18/2018

Site Visit

DEC staff observed portions of the 2018 groundwater sampling event. Several damaged well monuments were observed. Arcadis staff will document the damage and prepare to repair or remove the wells before the 2018 winter season.

Shawn Tisdell

7/25/2018

Document, Report, or Work plan Review - other

DEC staff reviewed and provided comments to the 2017 Groundwater Monitoring Report. This report suggests that contamination associated with the petroleum hydrocarbons from the former service station have decreased and are adequately assessed, and includes a request to conduct annual groundwater sampling during the second quarter of each year for nine monitoring wells and the decommissioning of two recovery system wells that are damaged and are not being used in the groundwater monitoring program. A work plan was requested by the DEC to provide details of the well decommissioning and other repairs to environmental infrastructure.

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

4/24/2020

Document, Report, or Work plan Review - other

DEC provided comments on the 2019 Annual Groundwater Monitoring Report submitted by Arcadis on December 31, 2020.

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

8/2/2021

Document, Report, or Work plan Review - other

2020 Annual Groundwater Monitoring event was conducted on July 25th & 27th, 2020. Groundwater samples were collected from monitoring wells MW-4R, MW-9, and RM-7A. Wells RM-4 and RM-6 were not accessible during this sampling event. Samples were submitted to the laboratory for GRO, DRO, BTEX, MTBE, and PAHs. Groundwater flow direction was to the south-southeast and depth to groundwater was 3.00 to 12.59 feet below ground surface.

Rebekah Reams

11/2/2021

Document, Report, or Work plan Review - other

2021 Annual Groundwater Monitoring event was conducted on July 13th, 2021. Groundwater samples were collected from monitoring wells MW-1R, MW-9, RM-4, and RM-7A using. Monitoring wells MW-4R, MW-6, MW-11, and RM-6 were obstructed by ice and could not be sampled. Monitoring well MW-7 could not be located. Samples were submitted to the laboratory for GRO, DRO, BTEX, and MTBE. Groundwater flow direction was to the west-southwest and depth to groundwater was 12.42 to 14.61 feet below ground surface.

Rebekah Reams

6/9/2022

Document, Report, or Work plan Review - other

DEC reviewed the Site Groundwater Monitoring Work Plan dated May 24, 2022. This work plan proposes to establish semi-annual sampling of site monitoring wells MW-1R, MW-2, MW-4R, MW-5, MW-6, MW-7, MW-8, MW-9, MW-11, RM-4, RM-6, and RM-7A.

Rebekah Reams

7/11/2022

Document, Report, or Work plan Review - other

DEC approved the Revised Site Groundwater Monitoring Work Plan with the condition that a well survey be completed during the two-year period the work plan is in place due to the length of time since the most recent survey was completed and with consideration for the presence of permafrost at the site that may impact site wells. This work plan proposes to establish semi-annual sampling of site monitoring wells MW-1R, MW-2, MW-4R, MW-5, MW-6, MW-7, MW-8, MW-9, MW-11, RM-4, RM-6, and RM-7A.

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

8/4/2023

Long Term Monitoring Workplan or Report Review

ADEC approved the Groundwater Analyte Reduction Request and Well Repair Work Plan following comment resolution. This work plan proposes to repair or replace damaged site wells and update the analytes included in the sampling plan.

Rebekah Reams

8/7/2023

Long Term Monitoring Workplan or Report Review

2023 First Semi-Annual Groundwater Monitoring event was conducted on June 11th, 2023. Groundwater samples were collected from monitoring wells MW-4R, MW-5, MW-7, MW-8, MW-9, MW-11, RM-4, and RM-7A. Monitoring wells MW-1R, MW-2, MW-6, and RM-6 were obstructed and were not gauged or sampled. Samples were submitted to the laboratory for GRO, DRO, VOCs, and PAHs. Groundwater flow direction was to the south-southeast and depth to groundwater was 11.82 to 14.15 feet below ground surface.

Rebekah Reams

10/12/2023

Offsite Soil or Groundwater Disposal Approved

ADEC approved transport of two 55-gallon drums of water and one 55-gallons of soil investigation derived waste.

Rebekah Reams

11/1/2023

Document, Report, or Work plan Review - other

ADEC approved the Addendum to Groundwater Analyte Adjustment Request and Well Repair Work Plan - Revision 2 which proposes to decommission air sparge/soil vapor extraction (AS/SVE) wells EW-1 through EW-4, SV-2, AS-4, AS-8 through AS-11, and AS-14 through AS-17 that were associated with the AS/SVE system that was decommissioned and removed from the site in 2014.

Rebekah Reams

1/12/2024

Long Term Monitoring Workplan or Report Review

2023 Second Semi-Annual Groundwater Monitoring event was conducted on October 8th, 2023. Groundwater samples were collected from monitoring wells MW-1R, MW-4R, MW-5, MW-6R, MW-7, MW-8, MW-9, MW-11, RM-4, and RM-7A. Monitoring well MW-2 was obstructed. RM-6R could not be located under snow and ice. Samples were submitted to the laboratory for GRO, DRO, lead and select VOCs and PAHs. Groundwater flow direction was to the south-southeast and depth to groundwater was 11.87 to 13.90 feet below ground surface.

Rebekah Reams

9/9/2024

Offsite Soil or Groundwater Disposal Approved

ADEC approved offsite transport of 20 gallons of decontamination and purge water generated June 2024

Rebekah Reams

9/25/2024

Meeting or Teleconference Held

ADEC staff met with Chevron and their consultant for an annual portfolio meeting to discuss site status, upcoming document submittals, pending reviews, and general updates for Chevron's contaminated sites throughout the state.

Rebekah Reams

11/7/2024

Long Term Monitoring Workplan or Report Review

2024 First Semi-Annual Groundwater Monitoring event was conducted on June 2nd, 2024. Groundwater samples were collected from monitoring wells MW-4R, MW-6R, MW-9, MW-11, RM-4, RM-6A, and RM-7A. Monitoring wells MW-1R and MW-5 were frozen and were not gauged or sampled. Samples were submitted to the laboratory for GRO, DRO, VOCs, PAHs, lead, and arsenic. Groundwater flow direction was to the south-southeast and depth to groundwater was 13.02 to 15.43 feet below ground surface.

Rebekah Reams

11/14/2024

Document, Report, or Work plan Review - other

ADEC reviewed the 2023 Well Decommissioning and Installation Report which documents the redevelopment of MW-4R and RM-4, the decommissioning and replacement of MW-6 and RM-6, and the decommissioning of former air sparge well AS-13. Soil samples collected during the installation of replacement wells MW-6R and RM-6R reported all results below cleanup levels with the exception of arsenic and chromium which were attributed to naturally occurring background concentrations. Groundwater samples collected from the repaired wells RM-4 and MW-4R reported several analytes above cleanup levels and new replacement wells RM-6R and MW-6R were below cleanup levels for all analytes. All site wells were surveyed during this field work.

Rebekah Reams

11/15/2024

Long Term Monitoring Workplan or Report Review

2024 Second Semi-Annual Groundwater Monitoring event was conducted on September 16 and 17, 2024. Groundwater samples were collected from monitoring wells MW-4R, MW-6R, MW-9, MW-11, RM-4, RM-6R, and RM-7A. Monitoring well MW-1R was not sampled or gauged due to ponding water in the parking lot that submerged the well vault. Samples were submitted to the laboratory for GRO, DRO, select VOCs and PAHs, lead, and arsenic. Groundwater flow direction was to the south and depth to groundwater was 10.91 to 13.03 feet below ground surface.

Rebekah Reams

Contaminant Information

Name

Level Description

Media

Comments

Control Type

Type

Details

Requirements

Description

Details

2008 Site Assessment and Second Semi-Annual Groundwater Monitoring Report

2012 Soil Excavation Report

2007 Site Assessment Report

2002 Remedial Soils Excavation and UST Removal

No associated sites were found.

Missing Location Data

Because the GIS location data for this site has not been entered, we cannot direct you to its position on the map. Click "Continue" to proceed to the Contaminated Sites Web Map or "Close" to return to the site report.

Continue Close

Alaska Department of Environmental Conservation

Site Report: Chevron #9-2114, Former Mike's University

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

2008 Site Assessment and Second Semi-Annual Groundwater Monitoring Report

2012 Soil Excavation Report

2007 Site Assessment Report

2002 Remedial Soils Excavation and UST Removal

Missing Location Data

State of Alaska Department of Environmental Conservation