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Site Report: Tesoro - Olson Gas Services Store #1

Site Name: Tesoro - Olson Gas Services Store #1
Address: 3607 Spenard Rd.; , Anchorage, AK 99503
File Number: 2100.26.072
Hazard ID: 23592
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 61.187558
Longitude: -149.908585
Horizontal Datum:NAD83

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.

Problems/Comments

In 1987 gasoline odors were noted during utility work along the road next to this property. On January 3, 1993 the station was closed and the tanks had their remaining product reoved. On April 21, 1995 Randy Hahn of Korovin Corporation (who had operated the facility since 1989) entered into a Compliance Order By Consent (COBC) with the State of Alaska. The COBC calls for the removal of the existing underground storage tank system, site assessment, and any necessary cleanup. Later in 1995 nine underground storage tanks and their associated piping was removed, and contaminated soil was encountered. In 1996 three monitoring wells were installed and groundwater contamination was identified. Later in 1996 a wind turbine vapor extraction system began operation. In 1997 three additional monitoring wells were installed. In 1998 some free product was found in one monitoring well on the property. In 2001 a blower was hooked up to the vapor extraction piping to enhance the remediation of the site. In September 2001 additional contaminated soil (1,120 tons) was excavated in the former tank and dispenser areas. Up to 28.6 mg/kg benzene, 8,410 mg/kg GRO, and 9,520 mg/kg DRO was left in place after the excavation. The excavated contaminated soil (1,120 tons) was thermally treated at ASR. Groundwater was encountered in the excavation at 12 feet below ground surface. Additional remediation piping and remediation system access manholes were installed in the excavation before backfilling. Later in 2001 one additional monitoring was installed. In 2003 the soil vapor extraction/air sparing system began operation to treat soil and groundwater at this site. Also in 2003 two additional monitoring wells were installed at this site. In 2013 three additional monitoring wells were installed and six soil borings were sampled as part of a brownfield assessment. Several drinking water wells in the area have been sampled and have not shown contamination over drinking water standards. The general groundwater flow direction is to the northwest to southwest. The March 2015 Targeted Brownfields Assessment report and earlier assessment reports have identified areas of the site that have not been sufficiently characterized as to the nature and extent of the contamination, this includes numerous surface stained areas contaminated by petroleum or other hazardous substances, building drain systems and their associated piping, the underground garage area, drum storage areas, lead contamination under former dispensers, and contamination under/near the existing structures that are all slated to be removed in preparation for site development. The full extent of the soil and groundwater contamination at this site has not been defined. Contamination extends off property to the south and west. The full extent of the groundwater contamination has not been defined (monitoring well MW-14 at the western edge of the 3608 Spenard Road property exceeds cleanup levels).

Action Information

Action Date Action Description DEC Staff
10/31/1988 Site Visit Citizen's complaint that during the construction of a water main along Chugach Street in the Summer 1987 that strong gasoline odors were encountered near the Olson's #1 gas station. ADEC State inspection on October 31, 1988 found site had surface contamination and could possibly be a leaking underground storage tank site. Former Staff
5/7/1990 Update or Other Action ADEC letter to Randy Hahn of Korovin Corporation requesting site assessment of his facility. He has operated the service station since 1989. Robert Weimer
8/14/1990 Update or Other Action Letter from State Department of Law to Randy Hahn's (Korovin Corporations) attorney, that Korovin Corporation as the operator of the Olson's Gas Service facility is liable for contamination at that site. The letter request that Korovin Corporation, as current operator of the facility, undertake assessment and any needed remediation as requested in the ADEC letter of May 7, 1990. Robert Weimer
11/27/1990 Document, Report, or Work plan Review - other Tank tightness test was conducted on all of the tanks and lines at the site. All tanks and lines tested tight, but there is still evidence of contamination associated with the underground storage tank system. Robert Weimer
1/26/1993 Update or Other Action ADEC receives notification that the service station closed on January 3, 1993, and the tanks had fuel pumped out to less than 1/2 inch of product in each tank. Robert Weimer
1/26/1993 Update or Other Action ADEC letter to Randy Hahn of Korovin Corporation to conduct a release investigation for this site. Robert Weimer
2/18/1993 Meeting or Teleconference Held The owner of a private well at 1204 West 36th Avenue says she will be having her well tested for possible fuel contamination. Robert Weimer
4/2/1993 Update or Other Action Second ADEC letter to Randy Hahn of Korovin Corporation requesting a release investigation. He has operated the service station since 1989. Robert Weimer
6/25/1993 Enforcement Action A Compliance Order was issued by EPA based on a June 25, 1993 facility inspection. The inspection found that 5 underground storage tank systems were out of compliance because they have out of service for more than 12 months and these tank systems need proper closure and site assessment. Robert Weimer
7/8/1994 Update or Other Action EPA follow up letter regarding a Compliance Order was issued by EPA based on a June 25, 1993 facility inspection. The RP, Randy Hahn has still not complied with the order. Robert Weimer
4/21/1995 Enforcement Action Randy Hahn of Korovin Corporation signs and enters into a Compliance Order By Consent (COBC) with the State of Alaska to conduct investigation, monitoring, cleanup, and reporting at the Olson's #1 (3607 Spenard Road) and the Olson's #2 (854 East 36th Avenue) sites. The terms of the COBC are binding on any future lessees, operators, and owners of those properties. Robert Weimer
5/5/1995 Enforcement Action ADEC issues a Notice of Violation (NOV) to the current operator of the facility Alpina Auto Repair for numerous violations of the State underground storage tank regulations and Alaska Statues 46.03.405(2) and 46.03.380(b)(3). Robert Weimer
5/25/1995 Document, Report, or Work plan Review - other ADEC approves a remedial investigation workplan. The plan proposes to remove and assess 8 underground storage tanks, 3 dispenser islands, and associated piping. Robert Weimer
9/14/1995 Leaking Underground Storage Tank Cleanup Initiated - Petroleum LUST corrective action underway. Former Staff
9/14/1995 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77909 ADEC receives notification that contaminated soil was encountered during the removal of the tanks and piping at this site. Robert Weimer
9/14/1995 Site Added to Database Former Staff
9/19/1995 Underground Storage Tank Site Characterization or Assessment Between September 13 and 19, 1995 nine underground storage tanks, and associated piping and dispensers were removed and assessed. Groundwater was encountered at 15.5 feet below ground surface. Up to 23,800 mg/kg DRO, 5,194 mg/kg GRO, 65.6 mg/kg benzene, and 540 mg/kg Lead remain in the in-situ soil at the site. 50 tons of diesel contaminated soil, 30 tons of gasoline contaminated soil, and 20 tons of used oil contaminated soils are currently stockpiled at the site. Former Staff
10/26/1995 Leaking Underground Storage Tank Corrective Action Underway ADEC approves thermal treatment of 50 tons of diesel contaminated soil and 30 tons of gasoline contaminated soil. The 20 tons of used oil contaminated soil needs further sampling. Former Staff
10/27/1995 Update or Other Action Randy Hahn of Korovin Corporation requests an emergency grant from the State Board of Storage Tank Assistance. The request is denied on November 27, 1995 because it does not meet emergency grant requirements. Former Staff
11/9/1995 Update or Other Action ADEC letter approves UST site assessment report, and requests submittal of a corrective action plan and release investigation workplan by December 9, 1995. Former Staff
1/12/1996 Document, Report, or Work plan Review - other ADEC conditionally approves workplan for release investigation and corrective action. Former Staff
2/9/1996 Document, Report, or Work plan Review - other ADEC receives results of the air sparging and soil vapor extraction pilot test. Robert Weimer
5/17/1996 Document, Report, or Work plan Review - other On May 17, 1996 three monitoring wells were installed at this site. Up to 105 mg/kg DRO, 1,000 mg/kg GRO, 55.4 mg/kg benzene in the soil samples collected. Up to 47.4 mg/l DRO, 231 mg/l GRO, and 35.2 mg/l benzene in the groundwater. Depth to groundwater was between 10.77 to 12.08 feet below ground surface. Groundwater flow direction was to the northwest. Robert Weimer
6/10/1996 Document, Report, or Work plan Review - other ADEC conditionally approves corrective action plan. The corrective action plan proposes installation of air sparge/vapor extraction system. Robert Weimer
6/21/1996 Offsite Soil or Groundwater Disposal Approved ADEC approves thermal treatment of ten drums of drill cuttings at ASR. Robert Weimer
9/13/1996 Offsite Soil or Groundwater Disposal Approved ADEC approves the thermal treatment of 1 drum of contaminated drill cuttings at ASR. Robert Weimer
9/25/1996 Update or Other Action ADEC approves workplan for the installation of an air sparging/vapor extraction treatment system at this site. Robert Weimer
10/21/1996 Update or Other Action ADEC letter requesting additional monitoring wells and pilot testing information by November 29, 1996. Robert Weimer
10/22/1996 Offsite Soil or Groundwater Disposal Approved ADEC approves the thermal treatment of 20 tons of used oil contaminated soil at ASR. Robert Weimer
11/18/1996 Document, Report, or Work plan Review - other November 18, 1996 groundwater monitoring event. Up to 32.6 mg/l benzene, 197 mg/l GRO, and 6.85 mg/l DRO in the groundwater. Contamination levels increased in some of the monitoring wells. Groundwater flow direction was to the northwest. Depth to water was 9.15 to 11.2 feet below ground surface. Robert Weimer
11/29/1996 Document, Report, or Work plan Review - other ADEC receives results of soil vapor extraction pilot testing. Robert Weimer
1/15/1997 Update or Other Action ADEC conditionally approves corrective action plan. The plan calls for continued operation of the soil vapor extraction system. Robert Weimer
4/11/1997 Update or Other Action Talked with RP's consultant. She said no work has been done since November of 1996. Robert Weimer
4/14/1997 Enforcement Action ADEC issues a Notice of Violation to Randy Hahn of Korovin Corporation for failure to conduct groundwater monitoring and submit remediation system reports. Robert Weimer
5/9/1997 Document, Report, or Work plan Review - other May 9, 1997 groundwater monitoring event. Up to 28.6 mg/l benzene, 190 mg/l GRO, and 8.12 mg/l DRO in the groundwater. Contamination levels increased in some of the monitoring wells. Groundwater flow direction was to the west. Depth to water was 5.7 to 9.87 feet below ground surface. Robert Weimer
5/28/1997 Update or Other Action ADEC letter requesting corrective action and additional monitoring wells by June 30, 1997. Robert Weimer
6/19/1997 Document, Report, or Work plan Review - other Three additional monitoring wells (MW-4, MW-5, MW-6) were installed. Monitoring wells MW-5 and MW-6 were installed across the street to the west. Monitoring well MW-4 was installed on property in the northwest corner. Up to non detect (<0.0577 mg/kg) benzene, 2.03 mg/kg GRO, and 7.04 mg/kg DRO in the soils. Up to 0.00657 mg/l benzene, non detect (<0.04 mg/l) GRO, and 4.09 mg/l DRO in the groundwater in those 3 monitoring wells. The groundwater results are biased low because of failure to preserve the samples. Robert Weimer
7/1/1997 Update or Other Action ADEC receives notification that 59.25 tons of contaminated soil was delivered to CleanSoils for thermal treatment. Also that the bioventing system was installed on June 29, 1997. Robert Weimer
11/7/1997 Document, Report, or Work plan Review - other November 7, 1997 groundwater monitoring event. Up to 20 mg/l benzene, 159 mg/l GRO, and 13 mg/l DRO in the groundwater. Contamination levels increased in some of the monitoring wells. Groundwater flow direction was to the west by southwest. Depth to water was 10.5 to 12 feet below ground surface. Robert Weimer
11/20/1997 Potentially Responsible Party/State Interest Letter ADEC sends Notification of Intent to Cost Recover Letter to Current Operator: ALPINA AUTO REPAIR C/0 RASIM KADIM Former Staff
11/24/1997 Meeting or Teleconference Held Rasim Kadim (the current operator of the facility) called and said Randy Hahn is the repsonsible party for cost recovery. Former Staff
12/17/1997 Enforcement Action ADEC sends a Notice Of Violation (NOV) to Randy Hahn of the Korovin Corporation for failure to do quarterly system monitoring, and air monitoring for the remediation system. Robert Weimer
1/20/1998 Document, Report, or Work plan Review - other RP submits results of the soil vapor extraction testing and air monitoring. The current system consists of underground piping using 4 wind turbines to extract vapors from the subsurface. Robert Weimer
2/20/1998 Document, Report, or Work plan Review - other February 20, 1998 groundwater monitoring event. Up to 24.0 mg/l benzene, 240 mg/l GRO, and 36 mg/l DRO in the groundwater. Monitoring well MW-3 had 0.05 feet (0.6 inches) of product. Contamination levels increased in some of the monitoring wells. Groundwater flow direction was to the southwest. Depth to water was 11.04 to 12.93 feet below ground surface. Robert Weimer
4/13/1998 Document, Report, or Work plan Review - other Report on the free product recovery in monitoring well MW-3. Between 0.25 inches to 1.5 inches of product was observed prior to bailing. On April 6, 1998 the monitoring well only had a light sheen. Robert Weimer
6/18/1998 Document, Report, or Work plan Review - other June 18, 1998 groundwater monitoring event. Up to 19.0 mg/l benzene, 180 mg/l GRO, and 17.7 mg/l DRO in the groundwater. Contamination levels increased in some of the monitoring wells. Monitoring well MW-3 had a sheen on the groundwater. Groundwater flow direction was to the southwest. Robert Weimer
7/30/1998 Update or Other Action ADEC letter approving reduction in groundwater monitoring for DRO. ADEC request collecting field measurements to determine the effective radius of influence of the existing remediation system. Robert Weimer
8/31/1999 Offsite Soil or Groundwater Disposal Approved ADEC approves thermal treatment of 9 drums of contaminated soil. Robert Weimer
5/11/2000 Enforcement Action ADEC sends a Notice Of Violation (NOV) to Randy Hahn of the Korovin Corporation for failure to do quarterly groundwater and system monitoring, quarterly Compliance Order By Consent (COBC) status reports, and radius of influence study for the proposed remediation system. Former Staff
6/1/2000 Document, Report, or Work plan Review - other Report of results of radius of influence study and May 17, 2000 groundwater monitoring results. Up to 30.8 mg/l benzene, 220 mg/l GRO, and 8.76 mg/l DRO in the groundwater. Contamination levels increased in one of the monitoring wells. A drinking water well at 3609 Spenard Road was sampled and was non-detect for VOCs, GRO, and DRO. Groundwater flow direction was to the west. Depth to water was 9.33 to 11.51 feet below ground surface. Robert Weimer
8/31/2000 Document, Report, or Work plan Review - other August 31, 2000 groundwater monitoring event. Up to 14.5 mg/l benzene, 187 mg/l GRO, and 9.12 mg/l DRO in the groundwater. Contamination levels increased in some of the monitoring wells. A drinking water well at 3609 Spenard Road was sampled and was non-detect for VOCs, GRO, and DRO. Groundwater flow direction was to the west by northwest. Depth to water was 9.72 to 10.94 feet below ground surface. Robert Weimer
9/27/2000 Update or Other Action ADEC letter noting that the overdue quarterly compliance order by consent quarterly reports submitted on August 3, 2000 were incomplete. Complete status reports are to be submitted by October 27, 2000. Robert Weimer
9/28/2000 Meeting or Teleconference Held Meeting with RP's consultant to discuss future site work at Olson's #1 & #2 sites. Robert Weimer
10/17/2000 Document, Report, or Work plan Review - other Vapor extraction pilot test conducted at the site. Estimate radius of influence is 61 feet. Robert Weimer
1/5/2001 Document, Report, or Work plan Review - other January 5, 2001 groundwater monitoring event. Up to 21.7 mg/l benzene, 211 mg/l GRO, and 11.3 mg/l DRO in the groundwater. Contamination levels increased in some of the monitoring wells. Groundwater flow direction was to the southwest. Depth to water was 10.13 to 11.92 feet below ground surface. The bioventing system (1/2 horsepower blower hooked up to 3 soil vapor extraction wells) continues operation. Robert Weimer
3/1/2001 Document, Report, or Work plan Review - other On January 19, 2001 three of the drinking water wells were sampled and on February 8, 2001 the other two drinking water wells were sampled. All samples were non-detect except for the drinking water well at 3737 McCain that had 0.206 ug/l benzene (5 ug/l drinking water standard). Robert Weimer
4/19/2001 Update or Other Action ADEC letter requesting continued groundwater monitoring, additional monitoring wells, supplemental drinking water well search and sampling, and utilities information. Robert Weimer
4/27/2001 Document, Report, or Work plan Review - other April 27, 2001 groundwater monitoring event. Up to 18.8 mg/l benzene, 202 mg/l GRO, and 11.7 mg/l DRO in the groundwater. Contamination levels decreased in the monitoring wells. Groundwater flow direction was to the west. Depth to water was 9.37 to 11.49 feet below ground surface. The bioventing system (1/2 horsepower blower hooked up to 3 soil vapor extraction wells) continues operation. Robert Weimer
6/1/2001 Document, Report, or Work plan Review - other A supplemental well search of drinking water wells within a 500 foot radius of the site was submitted. Five drinking water wells identified in that area. City water (AWWU) provides drinking water to most of the lots in the area. Robert Weimer
8/7/2001 Document, Report, or Work plan Review - other On August 7, 2001 a monitoring well was installed (MW-7). The soil samples were non-detect for BTEX, GRO, and DRO. The groundwater sample was non-detect for BTEX and GRO, but had 0.726 mg/l DRO. Robert Weimer
9/7/2001 Document, Report, or Work plan Review - other From September 4 through 7, 2001 additional contaminated soil was excavated in the former tank and dispenser areas. Up to 28.6 mg/kg benzene, 8,410 mg/kg GRO, and 9,520 mg/kg DRO left in the excavation after removal of 1,120 tons of contaminated soil that was thermally treated at ASR. Groundwater was encountered in the excavation at 12 feet below ground surface. Remediation piping and remediation access manholes were installed in the excavation before backfilling. Robert Weimer
10/30/2001 Document, Report, or Work plan Review - other October 30, 2001 groundwater monitoring event. Up to 15 mg/l benzene, 126 mg/l GRO, and 7.8 mg/l DRO in the groundwater. Contamination levels increased in some of the monitoring wells. Groundwater flow direction was to the west. Depth to water was 9.1 to 12.25 feet below ground surface. Only the drinking water well at 3609 Spenard Road was sampled and it was non-detect for VOCs, GRO, and DRO. Robert Weimer
1/16/2002 Document, Report, or Work plan Review - other Report of the results of the March 25, 2002 sampling of two drinking water wells in the area. 3801 McCain Loop had 0.00051 mg/l methylene chloride, 0.00879 mg/l GRO, and non detect (<0.505 mg/l) DRO and 3609 Spenard Road had 0.00054 mg/l methylene chloride, 0.00726 mg/l GRO, and non detect (<0.505 mg/l) DRO. The trip blank contained detectable GRO at 0.00952 mg/l. They were not able to get a water sample for 3737 McCain Loop and 1204 Willshire Avenue. Robert Weimer
3/21/2002 Document, Report, or Work plan Review - other ADEC letter conditionally approving workplan to conduct pilot testing for proposed remediation system, and to sample groundwater. Robert Weimer
5/9/2002 Document, Report, or Work plan Review - other May 9, 2002 groundwater monitoring event. Up to 7.07 mg/l benzene, 130 mg/l GRO, and 3.41 mg/l DRO in the groundwater. Contamination levels increased in some of the monitoring wells. Groundwater flow direction was to the west. Depth to water was 8.86 to 10.95 feet below ground surface. Only the drinking water well at 3609 Spenard Road was sampled and it was non-detect for VOCs, GRO, and DRO. The report states that the other drinking water well residents were not available to have their wells sampled. Robert Weimer
6/7/2002 Document, Report, or Work plan Review - other Air sparging pilot test was conducted between May 31, 2002 and June 7,2002. Estimated radius of influence was 4 to 5 feet. Robert Weimer
8/26/2002 Document, Report, or Work plan Review - other August 26, 2002 groundwater monitoring event. Up to 4.48 mg/l benzene, 126 mg/l GRO, and 4.67 mg/l DRO in the groundwater. Contamination levels increased in some of the monitoring wells. Groundwater flow direction was to the west by northwest. Depth to water was 7.89 to 11.38 feet below ground surface. Only the on property drinking water well (at 3609 Spenard Road) was sampled and it was non-detect for VOCs. Robert Weimer
10/7/2002 Leaking Underground Storage Tank Corrective Action Underway ADEC approves workplan for the installation of an airsparging/vapor extraction system at the site. Robert Weimer
12/18/2002 Update or Other Action Two furthest downgradient monitoring wells have increasing contamination over cleanup levels. ADEC letter requests installation of additional monitoring wells to define extent of the contamination from this site by February 1, 2003. The letter also request submittal of the soil and groundwater results by March 1, 2003. Robert Weimer
1/23/2003 Document, Report, or Work plan Review - other January 23, 2003 groundwater monitoring event. Up to 1.88 mg/l benzene, 120 mg/l GRO, and 3.12 mg/l DRO in the groundwater. Contamination levels decreased in most of the monitoring wells. Groundwater flow direction was to the northwest. Depth to water was 7.96 to 11.4 feet below ground surface. The monitoring wells were sampling by using a bailer after three well volumes were removed. Only the drinking water wells at 3609 Spenard Road and 3801 McCain Loop were sampled and they were both non-detect for VOCs and DRO. Robert Weimer
1/27/2003 Document, Report, or Work plan Review - other ADEC letter approves workplan to install two additional monitoring wells. Robert Weimer
3/4/2003 Document, Report, or Work plan Review - other Two additional off property monitoring wells were installed on March 4, 2003. Soil samples collected were non-detect for BTEX, GRO, and DRO. The groundwater samples collected had up to 0.631 mg/l benzene, 37.9 mg/l GRO, and 1.36 mg/l DRO. Robert Weimer
4/10/2003 Document, Report, or Work plan Review - other April 10, 2003 groundwater monitoring event. Up to 1.40 mg/l benzene, 92.1 mg/l GRO, and 2.27 mg/l DRO in the groundwater. Contamination levels decreased in most of the monitoring wells. Groundwater flow direction was to the west. Depth to water was 8.12 to 11.52 feet below ground surface. The monitoring wells were sampling by using a bailer after three well volumes were removed. Only the drinking water well at 3609 Spenard Road was sampled and it was non-detect for VOCs and DRO. Robert Weimer
5/5/2003 Update or Other Action ADEC approves thermal treatment of 1 drum of drill cuttings at ASR. Robert Weimer
5/15/2003 Document, Report, or Work plan Review - other Air sparge/vapor extraction system begins operation. The system includes 6 air sparge/vapor extraction wells. Robert Weimer
6/3/2003 Update or Other Action ADEC letter requests installation of additional monitoring wells to define the extent of the groundwater contamination off-property by July 18, 2003, with the results of the soil and groundwater sampling by August 18, 2003. ADEC also requests that the drinking water well at 3801 McCain Loop be sampled as soon as possible because it was not sampled during the April 10, 2003 groundwater monitoring event. Robert Weimer
6/30/2003 Update or Other Action ADEC approves a 1 month extension for the installation of additional monitoring wells to define the extent of the groundwater contamination off-property by August 18, 2003, with the results of the soil and groundwater sampling by September 18, 2003. Robert Weimer
9/30/2003 Meeting or Teleconference Held Meeting with RP's consultant. They confirmed that the remediation system is up and running. They said the have just completed another groundwater monitoring event (August 28, 2003). Robert Weimer
10/9/2003 Meeting or Teleconference Held Discussed with RP (Randy Hahn) that he can't wait until spring of 2004 to install additional monitoring wells requested, they need to be installed as soon as possible. He said that he intends to switch consultant on this site. Robert Weimer
12/8/2003 Document, Report, or Work plan Review - other Received August 28, 2003 groundwater monitoring event report. Up to 1.33 mg/l benzene, 118 mg/l GRO, and 2.28 mg/l DRO in the groundwater. Contamination levels decreased in most of the monitoring wells. Groundwater flow direction was to the west by southwest. Depth to water was 10.04 to 11.62 feet below ground surface. The monitoring wells were sampling by using a bailer after three well volumes were removed. Air sparge/vapor extraction system is operating 24 hours a day. Only the drinking water wells at 3609 Spenard Road (on property well) and 3801 McCain Loop were sampled and they were both non-detect for VOCs and DRO. Robert Weimer
2/22/2008 Exposure Tracking Model Ranking Site ranked on the new Exposure Tracking Model (ETM). The ETM is a new site ranking system that looks at, based on available data, the potential exposure pathways for the contamination remaining at the site. Robert Weimer
5/30/2008 Meeting or Teleconference Held Contacted RP to get information on site status. He said he will submit the most recent groundwater monitoring report. We discussed that as per the site COBC he needs to continue to do the monitoring, assessment, and cleanup of the sites. Robert Weimer
1/8/2009 Document, Report, or Work plan Review - other June 14, 2006 groundwater monitoring event. Up to 0.306 mg/l benzene, 31.5 mg/l GRO, and 2.21 mg/l DRO in the groundwater of the three monitoring wells sampled. Contamination levels increased in monitoring wells MW-3 for benzene and MW-4 for DRO from the previous monitoring event. Depth to water was 9.45 to 11.90 feet below ground surface. Groundwater flowed towards the west. Historically the groundwater has flowed to the southwest and northwest. On June 15, 2006 the system was adjusted from sparging and vapor extracting only AS-2/SVE-2 and AS-3/SVE-3 to AS/SVE wells 1, 4, 5, and 6 which resulted in a significant increase in SVE flow rate and contaminant concentration in the vapors according to the report. The air sparge/vapor extraction system (AS/VES) was operating 24 hours a day. An estimated 0.01 pounds of benzene and 2.57 pounds of GRO are being removed per day based on the June 19, 2006 air sample collected from the AS/VES system. No drinking water wells were sampled this monitoring event. Robert Weimer
1/8/2009 Meeting or Teleconference Held Contacted RP to get information on site status. He said he will submit a work plan soon for conducting groundwater monitoring and remediation system monitoring and conduct the monitoring. Robert Weimer
1/12/2009 Update or Other Action LUST site created in CSP database for source area 2001 UST system contamination, 78679 Robert Weimer
1/12/2009 Institutional Control Record Established Institutional Controls established and entered into the database. Robert Weimer
3/3/2009 Document, Report, or Work plan Review - other ADEC conditionally approves Work Plan Proposal for 2009. They are to repair the soil vapor extraction system, operate/monitor the soil vapor extraction/air sparge system, monitor all 9 monitoring wells on a quarterly basis, sample the 4 nearby drinking water wells on a quarterly basis, submit quarterly Compliance Order By Consent (COBC) reports, and install/sample additional monitoring wells to help define the extent of the contamination from this site. The results of the additional monitoring wells are to be submitted by May 17, 2009. The quarterly COBC and groundwater/drinking water monitoring are to be submitted by May 2, 2009. Robert Weimer
8/14/2009 Document, Report, or Work plan Review - other On August 7, 2009 received at report of the June 18, 2009 groundwater sampling of six monitoring wells (MW-2, MW-3, MW-4, MW-5, MW-7, and MW-9), and two drinking water wells (3801 McCain Loop Road and 3609 Spenard Road). They could not get access to sample the drinking water wells at 3737 McCain Loop and 1204 Willshire Avenue. Up to 470 ug/l benzene, 1640 ug/l ethylbenzene, 49 mg/l GRO, and 3.85 mg/l DRO were found in the monitoring wells sampled. Monitoring well MW-4 had the highest concentrations of benzene and GRO since it was installed in 1997. The two drinking water wells were non-detect for VOC's, GRO, and DRO. Depth to water was 9.31 to 11.38 feet below ground surface. Groundwater flow direction was toward the west. Three of the monitoring wells and two of the drinking water wells were not sampled during this event. Robert Weimer
9/11/2009 Meeting or Teleconference Held Discuss site with RP's consultant. Discuss ADEC letter to be sent out today. ADEC letter dated 9/11/09 requests monitoring of all 9 monitoring wells on a quarterly basis for BTEX, GRO, and DRO; sampling the 4 nearby drinking water wells on a quarterly basis for VOCs (524.2), GRO, and DRO; submit quarterly Compliance Order By Consent (COBC) reports; install/sample 2+ additional monitoring wells to help define the extent of the contamination from this site; and operation of the sites air sparging system. The results of the additional monitoring wells are to be submitted by November 20, 2009. The quarterly COBC, operation of the air sparge system, and groundwater/drinking water monitoring are to be submitted by November 1, 2009. The letter requests a minimum of 3 more quarterly events before evaluation for reduction in groundwater monitoring. The ADEC letter noted several additional violations of the COBC and 18 AAC 78 by the RP for failure to conduct work and submit reports as requested. Robert Weimer
8/6/2010 Update or Other Action To date the responsible party has not submitted any of the information or site work requested in the September 11, 2009 letter. Robert Weimer
1/21/2011 Document, Report, or Work plan Review - other Received information on a Phase I Assessment that was done on the property across the street at 3604 Spenard Road. They also installed 4 monitoring wells and sampled them in December 2010 or January 2011. They showed up to 139 ug/l benzene and 12 mg/l GRO in the groundwater. The highest concentrations were to the north and south of monitoring well MW5 that is also on the 3604 Spenard Road property in 1997. MW5 had 123 ug/l benzene and 6.14 mg/l GRO when last sampled on June 18, 2009. Robert Weimer
6/10/2011 Update or Other Action DEC and Cook Inlet Housing Authority entered into a PPA on June 10, 2011 for two properties (3600 and 3604 Spenard Road) across the street from the Olson #1 site (3607 Spenard Road). Both of these properties are down gradient from the Olson #1 site and have documented contamination that appears to have originated from the Olson #1 site. Robert Weimer
10/28/2011 Update or Other Action To date the responsible party has not submitted any of the information or site work requested in the September 11, 2009 letter. Robert Weimer
11/8/2011 Update or Other Action On November 8, 2011 the Alaska Department of Law sent a letter to Randy Hahn (property owner and RP) giving him Notice of Potential Liability. The letter requests payment of unpaid state oversight costs and requests he conduct the site work requested by DEC. The letter notes potential attorney fees and COBC penalties for past and current violations. Robert Weimer
11/15/2011 Update or Other Action ADEC letter dated November 15, 2011 requests monitoring of all 9 monitoring wells on a quarterly basis for BTEX, GRO, and DRO; sampling the 4 nearby drinking water wells on a quarterly basis for VOCs (524.2), GRO, and DRO; submit quarterly Compliance Order By Consent (COBC) reports; install/sample 2+ additional monitoring wells to help define the extent of the contamination from this site; and operation of the sites air sparging system. The results of the additional monitoring wells are to be submitted by January 19, 2012. The quarterly COBC submitted by November 25, 2011. The operation of the air sparge system by December 19, 2011, and groundwater/drinking water monitoring are to be submitted by January 19, 2012. The letter requests a minimum of 3 more quarterly events before evaluation for reduction in groundwater monitoring. The ADEC letter noted several additional violations of the COBC and 18 AAC 78 by the RP for failure to conduct work and submit reports as requested. Robert Weimer
7/23/2012 Brownfields Award Received approval from Mary Goolie that the site is eligible for brownfield funding through DEC's STRP Program. Site is proposed for Phase I Environmental Site Assessment and general evaluation of cleanup requirements for FY 2013. EPA State and Tribal Response Program (STRP) funds $64,039 awarded to Cook Inlet Housing Authority for Alpina Site aka Tesoro - Olson Gas Services Store #1. NTP# 18400212052. John Carnahan
10/1/2012 Document, Report, or Work plan Review - other Final report consisting of 'Phase I ESA' submitted and approved by R&R Program. John Carnahan
10/31/2012 Document, Report, or Work plan Review - other Final report consisting 'Additional Environmental Assessment Report,' received and approved by R&R Program. John Carnahan
1/15/2013 Update or Other Action Additional site assessment activities proposed through R&R (brownfield) program to support CIHA evaluation of property prior to potential purchase. John Carnahan
2/5/2013 Meeting or Teleconference Held Meeting with CIHA, S&W, and DEC staff to discuss potential assessment activities at the site. Review information to date, recent assessment and Phase I, and discuss potential site activities in future Site Assessment through R&R (brownfield) Program. John Carnahan
2/19/2013 Document, Report, or Work plan Review - other DEC approves the February 15, 2013 site characterization work plan from the prospective purchasers consultant. The plan proposes to sample 6 soil borings, install 3 monitoring wells, sample the 3 new and 7 existing monitoring wells, sample the 5 drinking water wells in the area, and to install and sample 3 sets of 2 nested soil gas sampling points. Robert Weimer
3/13/2013 Document, Report, or Work plan Review - other Phase I Environmental Site Assessment conducted in August/September 2012. On August 17, 2012 a site walk through was conducted. The report noted that structures were on the property prior to natural gas and city sewer and water service. Numerous drums and surface stains were noted. Robert Weimer
3/13/2013 Conceptual Site Model Submitted CSM submitted by prospective purchaser. The CSM identified current exposure pathways for surface soil, subsurface soil, groundwater, indoor air and outdoor air. Robert Weimer
3/21/2013 Update or Other Action EPA awards a Targeted Brownfield Assessment for the Spenard Road site, with official notification being sent to CIHA on this day. John Carnahan
5/3/2013 Update or Other Action DEC receives notification that additional site characterization work has started by the prospective purchaser. The work includes sampling 6 soil borings, installing 3 monitoring wells, sampling the 3 new and 7 existing monitoring wells, sampling the 5 drinking water wells in the area, and to installing and sampling 3 sets of 2 nested soil gas sampling points. Groundwater analysis is to include BTEX, GRO, DRO, and VOCs (method 8260B) in select wells. Drinking water well analysis is to include GRO, DRO, and VOCs (method 524.2). Soil analysis is to include GRO, DRO, RRO, and VOCs (method 8260B), with select locations also analyzed for PAHs, RCRA metals, and PCBs. Robert Weimer
6/18/2013 Offsite Soil or Groundwater Disposal Approved DEC approves the off-site treatment/disposal of two drums of contaminated purge water and three drums of contamianted soil cuttings that were generated during the May 2-3, 2013 sampling conducted by the prospective purchasers consultant. The water will be treated at Emerald and the soil will be disposed of at Columbia Ridge Landfill. Robert Weimer
8/14/2013 Update or Other Action On August 14, 2013 DEC signed a Prospective Purchaser Agreement (PPA) with Cook Inlet Housing Authority (CIHA). The PPA calls for CIHA to submit a groundwater monitoring well and drinking water well sampling plan by October 1, 2013, a work plan for additional cleanup and site characterization by May 1, 2014, and implement the cleanup and site characterization work plan by July 1, 2014. Robert Weimer
8/23/2013 Document, Report, or Work plan Review - other DEC provided comments on the August 15, 2013 Proposed Sampling Approach for the Targeted Brownfields Assessment (TBA) proposed to be conducted in the Fall of 2013. Robert Weimer
9/5/2013 Document, Report, or Work plan Review - other DEC provided comments on the August 29, 2013 Revised Proposed Sampling Approach for the Targeted Brownfields Assessment (TBA) proposed to be conducted in the Fall of 2013. Robert Weimer
9/30/2013 Update or Other Action DEC approves request from CIHA for an extension from October 1, 2013 to October 31, 2013 to submit a work plan for conducting long term groundwater and drinking water well sampling as specified in 19a of the Prospective Purchaser Agreement (PPA). Robert Weimer
11/1/2013 Update or Other Action DEC approves request from CIHA for an extension from October 1, 2013 to November 10, 2013 to submit a work plan for conducting long term groundwater and drinking water well sampling as specified in 19a of the Prospective Purchaser Agreement (PPA). Robert Weimer
11/1/2013 Update or Other Action DEC receives a notification that they were not able to use an in-well pump in the temporary monitoring wells. Because they used a peristaltic pump to collect the groundwater samples, the VOC samples from the temporary monitoring wells are considered biased low. Robert Weimer
1/6/2014 Document, Report, or Work plan Review - other CIHA submitted a November 22, 2013 Groundwater and Drinking Water Sampling Plan. The plan proposes to sample the on and off property monitoring wells and drinking water wells in the Fall of 2014 to supplement the Fall 2013, Spring 2014, and Summer 2014 sampling events being conducted under the EPA Targeted Brownfields Assessment (TBA). DEC requested that CIHA submit a revised work plan by February 1, 2014 that includes the following information/modifications: 1. As per item 17 in the PPA a written cost estimate needs to be included with any work plan. Please provide this with the revised work plan. 2. Because we do not have the results of the Fall 2013, Spring 2014, and Summer 2014 sampling events the Fall 2014 sampling event needs to include the same sampling proposed for the Summer 2014 sampling event in Table 1 of the work plan. 3. Once we have the results of the site sampling through the Summer 2014 you can propose for DEC review and approval a reduction in the monitoring for the Fall 2014 event. Any reduction will be based on a review of all site sampling, not just the results of the Summer 2014 sampling event. 4. Sample Collection Methods – The submersible pump intake needs to be as close as possible to the surface of the groundwater in each monitoring well. This needs to be demonstrated in the field notes and the monitoring report. Robert Weimer
4/9/2014 Document, Report, or Work plan Review - other On October/November 2013 eleven borings (SP01 through SP11) and four monitoring wells (MW-15 through MW-18) around the property were installed and sampled. Groundwater samples were collected from temporary well points in the eleven soil borings, and fourteen monitoring wells (MW-1 through MW-5, MW-7, MW-9, MW-10, and MW-13 through MW-18). Groundwater flow direction was west by northwest. Up to 42.3 mg/kg Chromium, 13.3 mg/kg Naphthalene, 0.023 mg/kg PCBs, 2,400 mg/kg DRO, 6,100 mg/kg RRO, 8,300 mg/kg GRO, 1,300 mg/kg 1,2,4-Trimethylbenzene, 430 mg/kg 1,3,5-Trimethylbenzene, and 5.9 mg/kg benzene in the soil samples collected. Up to 8.5 mg/l DRO, 11 mg/l RRO, 87 mg/l GRO, 4.8 mg/l 1,2,4-Trimethylbenzene, 19.2 ug/l lead, 11 ug/l 1,2-Dichloroethane, and 2,200 ug/l benzene in the groundwater samples collected. The report also identified large areas of petroleum surface staining on the property. Robert Weimer
7/30/2014 Document, Report, or Work plan Review - other Groundwater samples were collected in May 2014 from thirteen monitoring wells. Up to 9.9 mg/l DRO, 0.84 mg/l RRO, 90 mg/l GRO, and 2,800 ug/l benzene in the groundwater samples collected. The next groundwater monitoring event is scheduled for August 2014. Since volatile samples were collected using a peristaltic pump in the temporary well points their results are considered biased low. Robert Weimer
12/23/2014 Document, Report, or Work plan Review - other Reviewed Revised Groundwater and Drinking Water Sampling Plan for the Former Olson’s Tesoro Gas Services Store #1. The work plan recommends a reduced sampling and analytical schedule based on recent and historical groundwater monitoring results. The following wells will be sampled in the 4th quarter of 2014: MW-2, 3, 4, 5, 10, 14, 15, 16, 17 and 18. Drinking water samples will be collected from wells at 1204 Wilshire, 3740 McCain Loop, and 3801 McCain Loop. The estimated costs for this monitoring event and reporting is $15,056. Bill O'Connell
2/3/2015 Offsite Soil or Groundwater Disposal Approved DEC approves the off-site treatment/disposal of one drum of contaminated purge water that was generated during the December 30-31, 2014 sampling conducted by the prospective purchasers consultant. The water will be treated at Emerald. Robert Weimer
6/18/2015 Document, Report, or Work plan Review - other December 30-31, 2014 groundwater monitoring event. Up to 3.34 mg/l DRO, non detect (<1.65 mg/l) RRO, 50.3 mg/l GRO, and 1,640 ug/l benzene in the groundwater samples collected. Concentrations increased in 1 of the 10 monitoring wells sampled, but 5 of the monitoring wells were not sampled at the correct interval so additional wells may be increasing. The monitoring wells were sampled using a low flow submersible pump after purging the wells. Depth to water was 4.77 to 11.44 feet below ground surface. Groundwater flow direction was to the west. Given the groundwater flow direction to the west the extent of the groundwater contamination has not been defined down gradient of off-property monitoring well MW-14 which had 145 ug/l benzene. Robert Weimer
6/18/2015 Document, Report, or Work plan Review - other January 2, 2015 drinking water well sampling. Only the well at 3801 McCain Loop was sampled. It was non-detect for GRO, DRO, RRO, benzene, and VOCs. The 3609 Spenard Road, 1204 Wilshire Avenue, and 3740 McCain Loop drinking water wells were not sampled because the buildings are not occupied or don't have power to the well. Robert Weimer
6/18/2015 Conceptual Site Model Submitted May 2015 conceptual site model identified complete or potentially complete pathways for soil, groundwater, indoor air, and outdoor air. Robert Weimer
9/15/2015 Document, Report, or Work plan Review - other Reviewed Additional Site Characterization Plan for former Olson’s Tesoro #1. The objectives of the additional investigation are to delineate the extent of contaminated soil to the south/southwest of the site, collect additional data at contaminant source areas, install one additional monitoring well, and sample existing well MW-14 to document contaminant trends. Ten direct-push boreholes will be advanced to 20 feet bgs and 5 additional boreholes will be advanced to 5 feet bgs. Two soil samples will be collected from each 20 foot borehole and one from each 5 foot borehole, with an additional four samples to-be-collected as necessary to define the extent of contamination. The new monitoring well, MW-19, will be placed in the Chugach Way ROW across from the site to evaluate the extent of contamination in this area. Bill O'Connell
11/9/2015 Document, Report, or Work plan Review - other Reviewed Work Plan for Interim Removal Action and Soil Disposal, Former Olson’s Tesoro. During demolition work at the site, two hydraulic rams were discovered under the concrete slab at the former shop. Based on evidence of petroleum contamination, approximately 35 cubic yards of contaminated soil was excavated and stockpiled. Excavation confirmation samples collected from 3-5 feet bgs as well as samples of the stockpiled soil contained concentrations of DRO, RRO, benzene, PCE, and TCE above ADEC soil cleanup levels. One sample from the stockpile also contained lead at 599 mg/kg and is being tested for TCLP lead to evaluate disposal options. None of the soil is considered listed waste under RCRA based on reported discussions with EPA Region X. The Work Plan proposes removing additional contaminated soil from the hydraulic ram area and disposing of all soil at an approved facility, based on characterization. Excavation will focus on the top 5 feet of soil to prepare for future development activities, however excavation may extend to 10 feet bgs. The Work Plan states that impacted soil is likely to remain following the removal activities. Confirmation soil samples will be collected from the limits of the excavation in accordance with the Field Sampling Guidance. Contaminated soil will be transported offsite for disposal based on sampling results. Bill O'Connell
2/23/2016 Document, Report, or Work plan Review - other Environmental management plan approved for 3608 Spenard Road. See file #2100.26.595. Bill O'Connell
3/11/2016 Document, Report, or Work plan Review - other Reviewed work plan to decommission monitoring wells. MW-1, MW-2, MW-3, MW-6, MW-7, MW-9, MW-13, and MW-16 will be decommissioned in accordance with ADEC guidance. These wells have generally either not contained contamination above cleanup levels, were used for plume delineation, or are no longer needed. Bill O'Connell
3/16/2016 Document, Report, or Work plan Review - other Reviewed Work Plan for 2016 Quarterly Groundwater Monitoring. Monitoring wells MW-14, MW-15, and MW-19 will be sampled in April and July, 2016. The need for a fourth quarter sampling event will be determined based on the results of previous sampling events. Samples from MW-14 and MW-19 will be analyzed for GRO and BTEX, the sample from MW-15 will be analyzed for GRO and VOCs. If solvents are not detected in MW-15, this well will be removed from the 2016 sampling program. If solvents are detected in MW-15, MW-5 will be added to the sampling program to evaluate the extent of solvent contamination. Bill O'Connell
4/5/2016 Document, Report, or Work plan Review - other Reviewed Work Plan for Limited Removal Action and Soil Disposal at the former Olsons #1/Alpina site. The objectives of this project are to excavate chlorinated solvent contaminated soil from near a hydraulic ram at the former shop, excavate petroleum and solvent contaminated soil from the top 5 feet from several areas and characterize and dispose of 25 cubic yard stockpile generated during previous activities at the site. Chlorinated compounds above the cleanup level in soil will be removed from an approximate 600-800 square foot area near the former hydraulic ram as defined by previous site investigations. The depth of the excavation is estimated at 5-10 feet and the total volume of soil to be excavated is estimated at 80-110 cy. The excavation base and sidewalls will be screened in the field and sampled to evaluate remaining contaminant concentrations. Samples will be analyzed on a rush basis and additional soil will be excavated if contamination remains. If not, the excavation will be sampled per the 2016 Field Sampling Guidance. Stockpiled soil resulting from the excavation will also be sampled per the Field Sampling Guidance. Excavation will also occur at two hot spot areas identified during previous investigations near borehole locations PB10 and GB-08 to a depth of approximately 5 feet. The 25 cy stockpile currently on site will be sampled for disposal at the Anchorage Regional Landfill (ARL) be collecting one composite sample. Disposal options for additional soil excavated during these activities will be determined after excavation is complete and may include disposal at ARL, thermal treatment, or disposal at an out-of-state RCRA subtitle D landfill. Bill O'Connell
4/12/2016 Document, Report, or Work plan Review - other Reviewed Additional Site Characterization and Interim Removal Action report for 3607/3609 Spenard Road. Activities included the installation and sampling of one new monitoring well, MW-19 and the sampling of existing well MW-14, advancing and sampling soil borings, and the excavation of contaminated soil associated with two hydraulic rams beneath the former Shop Building. Soil borings were advanced and sampled to enhance the understanding of the extent of soil contamination at the former dry well, at an area north of the former Shop, near the primary UST source area, and near an area where contaminated soil had been previously excavated. The initial excavation of contaminated soil from beneath the former Shop included the removal and stockpiling of approximately 45 cubic yards of visibly contaminated soil. Confirmation samples indicated petroleum hydrocarbons and chlorinated solvents remained in soil above cleanup levels at the base and south sidewall of the initial excavation. Additional excavation removed another 20 cy of contaminated soil. Confirmation samples collected from the base and sidewalls following the final excavation contained DRO up to 1,220 mg/kg, PCE up to 0.672 mg/kg, and TCE up to 0.049 mg/kg. Due to the presence of chlorinated solvents and elevated petroleum concentrations, excavated soil was disposed of at Columbia Ridge Landfill in Oregon. New monitoring well MW-19 was installed across Chugach Way from the site to delineate the extent of groundwater impacts in this direction and groundwater samples were collected from the new well and also MW-14 located on the downgradient edge of the plume across Spenard Road. A soil sample collected during the installation of MW-19 did not contain contaminants above cleanup levels. Groundwater samples contained benzene above the cleanup at MW-14 (0.009 mg/l) and at MW-19 (0.0118 mg/l) Fourteen soil borings were advanced and sampled at several locations in an effort to better understand contaminant distribution at the site. Samples collected from these boreholes indicated petroleum and solvent contamination remains at the location of the former drywell beneath the former building and petroleum contamination remains north of the former Shop Building, in the vicinity of the former UST excavation and in other discrete areas. Bill O'Connell
4/21/2016 Document, Report, or Work plan Review - other Monitoring wells MW-1, MW-2, MW-3, MW-6, MW-7, MW-9, MW-13 and MW-16 were decommissioned in accordance with ADEC Guidance. Three additional wells of unknown origin located on the 3608 Spenard Road property were also decommissioned. Bill O'Connell
5/23/2016 Document, Report, or Work plan Review - other Monitoring well MW-5 was sampled on April 6, 2016 in support of the planned installation of a geothermal well field on the former PJ's property. Groundwater samples were collected from both the upper and lower portions of the water column. BTEX and 1,2-dichloroethane were detected in both samples but at concentrations below cleanup levels. Bill O'Connell
5/27/2016 Document, Report, or Work plan Review - other ADEC issued two approvals for the management of contaminated material during site development activities. One is an Environmental Management Plan for site grading activities at the source property at 3607 Spenard Rd. that provides for the handling and disposal of potentially contaminated soil generated during site grading activities; the other is an addendum to the Soils Management Plan for 3608 Spenard Road that was approved in February 2016. The addendum provides details on the management and disposal of potentially contaminated soil and groundwater that will be generated during the installation of 22 geothermal wells on the property. Bill O'Connell
8/9/2016 Document, Report, or Work plan Review - other Reviewed work plan for decommissioning of air sparge and SVE wells at 3607 and 3609 Spenard Rd. Wells will be decommissioned in accordance with ADEC guidance Bill O'Connell
10/26/2016 Update or Other Action Cook Inlet Housing Association was awarded an EPA Brownfield Cleanup grant to assist in the cleanup and redevelopment of this site. To document their proposed activities, CIHA prepared an Analysis of Brownfield Cleanup Alternatives, a Remedial Design Document, and a Cleanup Action Plan, all of which were approved by DEC and EPA. The grant will be used to transport and dispose of soils contaminated with petroleum, solvents, and lead that were generated during site grading and cleanup activities, Bill O'Connell
1/9/2017 Update or Other Action Reviewed Limited Removal Action Report for 3607 and 3609 Spenard Rd. The objectives of the project were to excavate near surface soil contaminated with chlorinated compounds (primarily tetrachloroethylene or PCE) and/or petroleum from several source areas. At the former hydraulic ram area, approximately 250 cubic yards (cy) of soil contaminated with petroleum and chlorinated compounds was excavated and stockpiled onsite. Confirmation samples contained TCE and petroleum compounds above cleanup levels in base and sidewall samples. Hotspot excavations were conducted at 5 discrete locations. At former Boring GB-08, 10 CY of PCE contaminated soil was excavated and stockpiled onsite. Confirmation samples contained PCE above the cleanup level in in sidewall samples. At former Boring PB10, 40 cy of petroleum contaminated soil was excavated and stockpiled onsite. Confirmation samples did not contain contaminants above cleanup levels. At former Boring GB-09, 10 cy of petroleum contaminated soil was excavated and stockpiled onsite. Confirmation samples did not contain contaminants above cleanup levels. At former Boring PB7, 5 cy of petroleum contaminated soil was excavated and placed into a container for offsite disposal. Confirmation samples contained DRO above the cleanup level. At former Boring PB2, 10 cy of petroleum contaminated soil was excavated and stockpiled onsite. Confirmation samples contained DRO and RRO above the cleanup levels. Contaminated soil was disposed of at Anchorage Regional Landfill if suitable, otherwise soil was disposed of at Columbia Ridge Landfill in Oregon. Bill O'Connell
2/22/2017 Update or Other Action Reviewed 2016 Quarterly Monitoring Report for 3607 and 3609 Spenard (aka Olson’s #1, Alpina). Activities included the replacement of monitoring well MW-14 with MW-14r which was destroyed during construction activities at the site and the collection of groundwater samples from up to four wells on three occasions, April, July, and December. First quarter results from 2016 were submitted previously. Samples were collected from MW-5, MW-14, MW-14r, MW-15, and MW-19. MW-15 nearest to the source areas contained petroleum and solvent contamination at concentrations above groundwater cleanup levels on the two occasions it was sampled in April and June. Downgradient wells MW-5 and Mw-14r did not contain contaminants above groundwater cleanup levels during the December sampling event. Bill O'Connell
3/29/2017 Document, Report, or Work plan Review - other Reviewed Work Plan for 2017 Groundwater Monitoring and Well Decommissioning. One sample will be collected from well MW-14r and analyzed for GRO and VOCs. If the results are below cleanup levels, this well along with MW-3, MW-4, MW-5, MW-10, MW-14r, MW-15, MW-17, MW-18, and MW-19 will be decommissioned in accordance with ADEC guidance. Bill O'Connell
4/4/2017 Document, Report, or Work plan Review - other Reviewed 2016 Field Screening and Soil Disposal Report from Former Olson’s Gas Services Store #1. The report documents the removal, field screening and disposal of contaminated and clean soil generated during site grading activities. The objective of soil removal was to prepare the site for redevelopment. Field work was conducted from July through October 2016. Approximately 2,100 cubic yards of soil was separated into 18 individual stockpiles that were field screened and sampled to characterize the soil for disposal. Approximately 500 cy of clean soil was used to backfill open excavations, 820 cy of petroleum contaminated soil was transported to ASR for thermal treatment, 320 cy of solvent and petroleum contaminated soil was transported to ASR for thermal treatment, and 465 cy of clean soil was disposed of at the Anchorage regional landfill. Soil containing solvents that was treated at ASR was sampled for dioxins after treatment. Dioxins were not detected above the DEC cleanup level. Bill O'Connell
5/25/2017 Document, Report, or Work plan Review - other Reviewed April 2017 Groundwater sampling and monitoring well decommissioning report. One sample was collected from monitoring well MW-14r. After data indicated that contaminant concentrations were below cleanup levels, DEC gave approval to decommission all remaining monitoring wells at the site. All remaining wells were located and decommissioned except MW-15, which is presumed to have been destroyed during site grading activities. Bill O'Connell
6/5/2017 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 77909 2001 UST system contamination. Bill O'Connell
10/24/2017 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation, Contaminated Sites Program (DEC) has completed a review of the environmental records associated with the Tesoro - Olson Gas Services Store #1 located at 3607 Spenard Road in Anchorage, Alaska. Based on the information provided to date, it has been determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment and no further remedial action will be required as long as the institutional controls are maintained and effective and no new information becomes available that indicates residual contamination poses an unacceptable risk. Bill O'Connell
4/12/2021 Document, Report, or Work plan Review - other Soil and Water Management Plan approved on this date. Bill O'Connell

Contaminant Information

Name Level Description Media Comments
Benzene > Table C Groundwater
Benzene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
GRO > Table C Groundwater
GRO > Human Health/Ingestion/Inhalation Soil
DRO > Table C Groundwater
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
Notice of Environmental Contamination

Requirements

Description Details
Other On April 21, 1995 Randy Hahn of Korovin Corporation enters into a Compliance Order By Consent (COBC) with the State of Alaska. The COBC calls for the removal of the existing underground storage tank system, site assessment, and any necessary cleanup.
Advance approval required to transport soil or groundwater off-site.
Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70)
Hazard ID Site Name File Number
26079 Spenard Area Assessment 2100.57.018
26484 Commercial Property - 3608 Spenard Road 2100.26.595

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