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Site Report: Shaw/TMS Anchorage Terminal

Site Name: Shaw/TMS Anchorage Terminal
Address: 5801 E. 4th Ave., Anchorage, AK 99504
File Number: 2100.26.171
Hazard ID: 24537
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 61.218970
Longitude: -149.772290
Horizontal Datum:WGS84

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

Former Laidlaw (First Student/First Group America) facility. A gasoline UST was removed in 1994. Soil and groundwater contamination was identified. Three monitoring wells were installed in 1997. Additional contaminated soil was removed in fall of 2002. Up to 0.175 mg/kg benzene (0.025 mg/kg benzene cleanup level) and non-detect (<3.69 mg/kg) GRO (300 mg/kg GRO cleanup level) left in the excavation. A replacement monitoring well (MW1R) was installed in 2003. Soil samples collected during the monitoring well installation in 2003 had up to 0.159 mg/kg benzene (0.025 mg/kg benzene cleanup level) at 15 feet below ground surface at soil/water interface. Groundwater monitoring continued until November 6, 2012 when benzene concentrations and other contaminants of concern in the groundwater were below Table C cleanup levels for one year. On November 4, 2013 soil samples were collected from three soil borings to assess current soil concentrations at the site. All soil samples were non detect (<0.0251 mg/kg) for benzene and other contaminants of concern. The remaining monitoring well (B3MW) was properly decommissioned on May 22, 2015. Recommend site for corrective action complete (closure) status.

Action Information

Action Date Action Description DEC Staff
5/22/1997 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 78064 Former Staff
5/22/1997 Site Added to Database Former Staff
5/23/1997 Underground Storage Tank Site Characterization or Assessment Tank removal site assessment found soil and groundwater contamination. Robert Weimer
9/16/1997 Release Investigation 3 monitoring wells were installed. Robert Weimer
11/20/1997 Update or Other Action ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: BERT SHAW Former Staff
12/29/1997 Update or Other Action ADEC requests continued groundwater monitoring. Former Staff
3/25/1998 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Former Staff
3/29/2001 Update or Other Action Quarterly groundwater monitoring to continue. Robert Weimer
9/23/2002 Offsite Soil or Groundwater Disposal Approved Approved treatment of contaminated soil stockpile at ASR. Robert Weimer
10/15/2002 Document, Report, or Work plan Review - other Additional contamined soil was removed and placed in an on-site soil storage cell. Up to 0.175 mg/kg benzene and non-detect (<3.69 mg/kg) GRO left in the excavation at the soil/water interface (15 to 17 feet below ground surface). Robert Weimer
4/2/2003 Document, Report, or Work plan Review - other A replacement monitoring well was installed (MW1R). Up to 0.159 mg/kg benzene and non-detect (<1.86 mg/kg) GRO in soil at 15 feet below ground surface at soil/water interface. April 2, 2003 groundwater monitoring. Up to 36.7 ug/l benzene and 0.238 mg/l GRO in groundwater. Concentrations appear stable. Depth to groundwater was 8.80 to 9.47 feet below ground surface. Historically groundwater flow direction is to the southwest. Robert Weimer
6/25/2003 Document, Report, or Work plan Review - other June 25, 2003 groundwater monitoring. Up to 16.7 ug/l benzene and non-detect (<0.09 mg/l) GRO in groundwater. Concentrations appear stable. Depth to groundwater was 8.86 to 9.49 feet below ground surface. Historically groundwater flow direction is to the southwest. Robert Weimer
10/22/2003 Document, Report, or Work plan Review - other October 22, 2003 groundwater monitoring. Up to 17.5 ug/l benzene and non-detect (<0.09 mg/l) GRO in groundwater. Concentrations appear stable. Depth to groundwater was 8.65 to 9.29 feet below ground surface. Historically groundwater flow direction is to the southwest. Robert Weimer
12/18/2003 Document, Report, or Work plan Review - other ADEC approved decommissioning of 210 cubic yard stockpile and reduction of groundwater monitoring to semi-annual for BTEX in monitoring wells MW-1R and B3MW. Robert Weimer
1/23/2004 Document, Report, or Work plan Review - other January 23, 2004 groundwater monitoring. Up to 15.6 ug/l benzene and non-detect (<0.09 mg/l) GRO in groundwater. Concentrations appear stable. Depth to groundwater was 9.27 feet below ground surface. Historically groundwater flow direction is to the southwest. Robert Weimer
6/18/2004 Document, Report, or Work plan Review - other June 18, 2004 groundwater monitoring. Up to 13.8 ug/l benzene and non-detect (<0.09 mg/l) GRO in groundwater. Concentrations appear stable. Depth to groundwater was 8.54 to 9.00 feet below ground surface. Historically groundwater flow direction is to the southwest. Robert Weimer
8/26/2004 Update or Other Action Laidlaw continues to monitor the groundwater at this site. Robert Weimer
11/2/2004 Document, Report, or Work plan Review - other October 6, 2004 groundwater monitoring. Up to 13.8 ug/l benzene in the groundwater. Concentrations appear stable. Depth to groundwater was 7.85 to 8.47 feet below ground surface. Historically groundwater flow direction is to the southwest. Robert Weimer
10/21/2005 Update or Other Action Waiting on results for 2005 annual groundwater sampling. Robert Weimer
6/2/2008 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
3/3/2009 Update or Other Action Talked with Tim McQuaid with First Student (the RP for this site - they purchased Laidlaw), he will contact the past consultant to have them submit any reports since the October 2004 sampling and provide a plan for conducting future semi-annual groundwater sampling. Prior to closure they will also need to collect confirmation soil samples in accordance with an approved workplan, to show that the site soils meets site cleanup levels. Robert Weimer
6/22/2009 Update or Other Action Talked with Tim McQuaid with First Student (the RP for this site - they purchased Laidlaw), he said that Nal Cutshal with Strata Environmental has been assigned as the lead on this site. I talked with her and she is still waiting on copies on Laidlaws files on the site to forward on any reports after October 2004. She said that she will contact Greg D. with APC Services to start conducting as soon as possible semi-annual groundwater monitoring at the site. Robert Weimer
12/18/2009 Update or Other Action Received notification from Nan Cutshall that the new RP point of contact for this site is Todd Bachand of FirstGroup America Inc. Robert Weimer
1/11/2010 Meeting or Teleconference Held Talked with Todd Bachand of FirstGroup America Inc. He will contact Shannon & Wilson to submit to DEC any reports of work since October 2004. He will also submit a work plan for future monitoring. Robert Weimer
2/5/2010 Meeting or Teleconference Held Talked with Tim Riddle of Strata Environmental. He said they are contracting with Shannon & Wilson to do groundwater monitoring at the site late spring 2010. Robert Weimer
3/17/2010 Document, Report, or Work plan Review - other Review February 2010 semi-annual groundwater monitoring sampling work plan. Provide comments to RP's consultant. DEC requests 1,2-DCA and EDB sampling during the next groundwater monitoring event. DEC also requests complete copies of field notes with all future monitoring reports. DEC also requests that bailers or peristaltic pumps not be used for collecting volatile groundwater samples, due to the potential loss of volatiles using those methods, and that the consultant provide information on how the groundwater samples are to be collected at this site. Robert Weimer
4/16/2010 Update or Other Action Discussed site history and future site work with property owners attorney. The next groundwater monitoring event should happen soon. Generally they will need 4 quarterly groundwater monitoring events that meet cleanup levels to demonstrate that groundwater meets site cleanup levels. They will also need confirmation soil samples to show that the soil meets cleanup levels for site closure. Robert Weimer
5/5/2010 Site Characterization Workplan Approved Review and approve the May 3, 2010 revised groundwater monitoring workplan. The workplan calls for semi-annual sampling monitoring well MW1R for BTEX, 1,2-DCA and EDB; and monitoring well B3MW for BTEX. They plan to sample in May and October of 2010. Robert Weimer
10/13/2010 Site Characterization Report Approved May 11, 2010 groundwater monitoring. Up to 5.86 ug/l benzene in the groundwater. EDB and 1,2-DCA were non-detect. Concentrations have decreased in both monitoring wells sampled from the previous monitoring event. Depth to groundwater was 8.58 to 9.14 feet below ground surface. Historically groundwater flow direction is to the southwest. Robert Weimer
10/13/2010 Site Characterization Workplan Approved DEC approves request to suspend sampling groundwater for EDB and 1,2-DCA. They were both non-detect with detection limits below cleanup levels on May 11, 2010. Robert Weimer
10/14/2010 Update or Other Action DEC requested complete copies of field notes that were missing from the groundwater monitoring report. DEC received electronic copies later this day. Robert Weimer
10/14/2010 Site Visit DEC site visit to observe October 14, 2010 groundwater monitoring. Robert Weimer
2/1/2011 Document, Report, or Work plan Review - other October 14, 2010 groundwater monitoring. Up to 9.07 ug/l benzene in the groundwater. Concentrations have increased in one of the two monitoring wells sampled from the previous monitoring event. Depth to groundwater was 9.16 to 9.58 feet below ground surface. Historically groundwater flow direction is to the southwest. One monitoring well (B3MW) continues to exceed cleanup levels. Need two consecutive semi-annual groundwater monitoring events that meet cleanup levels and confirmation soil sampling demonstrating that the soil meets cleanup levels for corrective action complete status. Robert Weimer
2/2/2011 Update or Other Action DEC letter to First Group America (RP) requesting that monitoring well B3MW be sampled on a semi-annual basis (May and October) until there are two consecutive semi-annual monitoring events below cleanup levels. The letter also approves decommissioning the two other monitoring wells (MW1R and B2MW) and requests a workplan for the decommissioning and a schedule be submitted by June 1, 2011. The letter also requests, once the groundwater meets cleanup levels, a workplan for collecting confirmation soil samples. Robert Weimer
2/2/2011 Update or Other Action ADEC sends Notification of Intent to Cost Recover Letter to Current RP: First Group America (Laidlaw) who operated the gasoline tank system that had the release. Robert Weimer
2/2/2011 Exposure Tracking Model Ranking A new updated ranking with the Exposure Tracking Model (ETM) has been completed for source area 78064 1994 UST contamination. 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
9/28/2011 Document, Report, or Work plan Review - other June 6, 2011 groundwater monitoring. Up to 8.1 ug/l benzene in groundwater. Concentrations have decreased in the one monitoring well sampled (B3MW) from the previous monitoring event. Depth to groundwater was 9.66 feet below ground surface. Historically groundwater flow direction is to the southwest. Only one monitoring well (B3MW) exceeds default cleanup levels. DEC has requested two consecutive semi-annual groundwater monitoring events that meet cleanup levels and confirmation soil sampling demonstrating that the soil meets cleanup levels for corrective action complete status. Monitoring wells MW1R and B2MW were decommissioned on June 7, 2011. The next monitoring event is scheduled for October 2011. Robert Weimer
3/9/2012 Document, Report, or Work plan Review - other October 25, 2011 groundwater monitoring. Up to 5.7 ug/l benzene in groundwater. Concentrations have decreased in the one monitoring well sampled (B3MW) from the previous monitoring event. Depth to groundwater was 9.51 feet below ground surface. Historically groundwater flow direction is to the southwest. Only one monitoring well (B3MW) exceeds default cleanup levels. DEC has requested two consecutive semi-annual groundwater monitoring events that meet cleanup levels and confirmation soil sampling demonstrating that the soil meets cleanup levels for corrective action complete status. Report approved. Robert Weimer
3/16/2012 Update or Other Action DEC letter to First Group America (RP) requesting that monitoring well B3MW be sampled on a semi-annual basis (May and October) until there are two consecutive semi-annual monitoring events below cleanup levels. The letter also requests, once the groundwater meets cleanup levels, a workplan for collecting confirmation soil samples. Robert Weimer
8/21/2012 Document, Report, or Work plan Review - other June 12, 2012 groundwater monitoring. Up to 4.1 ug/l benzene in groundwater. Concentrations have decreased in the one monitoring well sampled (B3MW) from the previous monitoring event. Depth to groundwater was 9.02 feet below ground surface. Historically groundwater flow direction is to the southwest. DEC has requested two consecutive semi-annual groundwater monitoring events that meet cleanup levels and confirmation soil sampling demonstrating that the soil meets cleanup levels for corrective action complete status. Robert Weimer
2/19/2013 Update or Other Action As per the DEC letter of March 16, 2012 there needs to be confirmation soil samples collected in accordance with an approved work plan to evaluate the site for closure. RP's consultant is to submit the work plan. Robert Weimer
3/4/2013 Document, Report, or Work plan Review - other November 6, 2012 groundwater monitoring. Up to 3.5 ug/l benzene in groundwater. Concentrations have decreased in the one monitoring well sampled (B3MW) from the previous monitoring event. Depth to groundwater was 9.04 feet below ground surface. Historically groundwater flow direction is to the southwest. The monitoring well was purged prior to sampling and the samples were collected using a low flow in well pump. DEC has requested confirmation soil sampling to demonstrate that the soil meets cleanup levels for corrective action complete status. The consultant is to provide a work plan for the soil sampling soon. Robert Weimer
4/17/2013 Update or Other Action Based on current groundwater sampling data DEC is approving suspending, until further notice, groundwater sampling at this site. Based on the results of the confirmation soil sampling some long-term groundwater monitoring may need to continue if a soil source remains at this site, so the monitoring wells are not currently approved to be decommissioned. Robert Weimer
6/12/2013 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78064 1994 UST contamination. Robert Weimer
10/2/2013 Document, Report, or Work plan Review - other DEC conditionally approves work plan for sampling 3 soil borings to take confirmation soil samples to assess for contamination at B1MW, B3MW, and MW-1R that had previously has soil contamination remaining over Method 2 cleanup levels. The condition of the approval is that the soil boring next to MW-1R be placed to the southwest of MW-1R. Robert Weimer
10/23/2014 Document, Report, or Work plan Review - other DEC has no objection to decommissioning the remaining monitoring well in accordance with the linked September 2013 Monitoring Well Guidance. The consultant is to provide documention when that has been completed. Robert Weimer
10/24/2014 Document, Report, or Work plan Review - other On November 4, 2013 soil samples were collected from three soil borings to assess current soil concentrations at the site. All soil samples were non detect (<0.0251 mg/kg) for benzene and other contaminants of concern. Recommend site for corrective action complete (closure) status once we have documentation that the remaining monitoring well has been properly decommissioned. Robert Weimer
7/29/2015 Update or Other Action Received documentation that the last remaining monitoring well B3MW was decommissioned by GeoTek Alaska on May 22, 2015 in accordance with the ADEC September 2013 Monitoring Well Guidance. Robert Weimer
7/29/2015 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78064 1994 UST contamination. Robert Weimer
9/26/2015 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed a review of the environmental records associated with the Shaw /TMS Anchorage Terminal site located 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. Chelsy Passmore

Contaminant Information

Name Level Description Media Comments
Benzene < Table C Groundwater

Control Type

Type Details
No ICs Required

Requirements

Description Details
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)

No associated sites were found.

Missing Location Data

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State of Alaska Department of Environmental Conservation

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Phone: 907-465-5066
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