Skip to content Skip to content

Alaska Department of Environmental Conservation

You are here: DEC / SPAR / CSP / SPAR Online Services / Contaminated Sites Search / Site Report

Site Report: ARRC Anchorage Terminal Reserve GW Area 1

Site Name: ARRC Anchorage Terminal Reserve GW Area 1
Address: 1749, 1849, and 1850 Ship Avenue, Anchorage, AK 99501
File Number: 2100.38.447
Hazard ID: 25404
Status: Active
Staff: Michael Hooper, 9074515174 michael.hooper@alaska.gov
Latitude: 61.223824
Longitude: -149.846212
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

Remedial Investigation ARRC Anchorage Terminal Reserve U.S. EPA Docket No. CERCLA 10-2004-0065, submitted by ENSR and recieved by the ADEC on this date. This site is located at the Groundwater Area 1 in the Anchorage Terminal Reserve. The area is characterized by a TCE plume, which starts at Sitka Street next to Karen's RV (LP-072) and flows west towards Ship Creek, passing through the Mushroom Yard/ Taylor Leasing LP-125) and passing through the Blackard Property (AKA Mat-Su Incorporated). The highest concentration of TCE in the groundwater (GW) is located at Karen's RV along Sitka street at 0.27 mg/L. TCE concentrations up to 0.070 mg/L remain in the GW at the Mushroom yard: in the middle of the property between lots 2 & 3; and along the north edge of the property line. TCE concentrations up to 0.031 mg/L remain in the GW at the Blackard Property just NW of the property line. Subslab soil gas contains TCE up to 3,900 ug/m^3. For more information consult CS file # 2100.38.447 ARRC Anchorage Terminal Reserve.

Action Information

Action Date Action Description DEC Staff
10/23/2007 Site Characterization Report Approved On this date ADEC received the Site Characterization Solvent Groundwater Plume North Sitka Street and Spar Avenue Area submitted by Shannon & Wilson and dated October 2007. The purpose of the investigation was to evaluate soil and groundwater upgradient of Karen’s RV Ground Water Area 1 plume for a potential upgradient source area. Eleven soil borings were advanced along Railroad Spur, Spar Avenue, and North Sitka Street and completed as temporary well points. Soil samples collected at the groundwater interface at a depth of 3 to 5 feet bgs and 5 to 8 feet bgs from 5 out of the 11 borings contained TCE above migration to groundwater cleanup levels (note: reporting limit exceeded cleanup levels in four ND borings). The most contaminated soil sample was collected from B1 just northeast of monitoring well DPB21 with TCE at 0.364 mg/kg. DPB21, located at Karen’s RV, has historically been the most contaminated for TCE. Three out of the 11 well point samples collected contained TCE above Table C cleanup levels. The most contaminated monitoring well was again B1 just northeast of monitoring well DPB21 with TCE at 0.0364 mg/L. The TCE Plume was fairly well defined to the east and south of the Karen’s RV site based off decreasing levels of TCE below cleanup levels along Spar Ave and Railroad Spur road. Grant Lidren
4/20/2009 Site Added to Database A new site has been added to the database Mitzi Read
4/20/2009 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 78765 name: Ground Water Area 1 Grant Lidren
10/15/2009 Update or Other Action ADEC received the Sub-slab soil gas sampling results for lease properties LP-072 and LP-125, ARRC Terminal Reserve USEPA Docket No. CERCLA 10-2004-0065 submitted by Geosphere. Subslab soil gas samples were collected from Karen's RV(LP-072) and from Taylor Leasing (LP-125). Four subslab soil gas samples collected from Karen's RV contained TCE up to 610 ug/m^3. Four subslab soil gas samples collected from Taylor Leasing contained TCE up to 3,900 ug/m^3 and PCE up to 3,900 ug/m^3(Note: 2017 ADEC Target levels for subslab commercial soil gas is 1,800 ug/m^3 for PCE and 84 ug/m^3 for TCE). The Report concludes, based off the Johnson and Ettinger model (1991), no further study and remediation are not needed. Grant Lidren
4/15/2015 Update or Other Action On this date, ADEC sent a letter to ARRC requiring further evaluation of the vapor intrusion pathway. Grant Lidren
11/24/2015 Update or Other Action On this date, ADEC sent a letter to ARRC requiring further evaluation of the vapor intrusion pathway. Grant Lidren
3/25/2016 Update or Other Action On this date, ADEC sent a letter to ARRC requiring further evaluation of the vapor intrusion pathway. Grant Lidren
4/20/2016 Update or Other Action On this date, ADEC received the Anchorage Terminal Reserve Oversight Referral letter submitted by EPA dated April 18, 2016. The letter states, "EPA will enter a corrective action event code into RCRAInfo to indicate the site has been transferred to a non-RCRA authority, with event code comments documenting the transfer of responsibility to ADEC." As a result, ADEC will continue to manage contaminated sites in the Anchorage Terminal Reserve in accordance with State regulations. Grant Lidren
9/23/2016 Update or Other Action On this date, ADEC sent a letter to ARRC requiring further evaluation of the vapor intrusion pathway. Grant Lidren
11/16/2016 Meeting or Teleconference Held on this date, ADEC conducted a meeting with Geosphere and ARRC to discuss vapor intrusion risk at the site. Based off data presented at the meeting, ARRC was planning to draft an updated VI assessment and send it to ADEC. Grant Lidren
12/23/2016 Document, Report, or Work plan Review - other ADEC received a document dated 12/23/2016 titled "Responses to ADEC Questions Regarding Vapor Intrusion at Karen's RV and Taylor Leasing" submitted by Geosphere. Grant Lidren
4/13/2017 Update or Other Action On this date, ADEC sent a letter to ARRC requiring further evaluation of the vapor intrusion pathway. Grant Lidren
5/12/2017 Update or Other Action On this date, ADEC received a letter from ARRC requesting a third party review of the 2009 subslab gas sampling data and model. Grant Lidren
5/17/2017 Update or Other Action On this date, ADEC sent a letter to ARRC requiring further evaluation of the vapor intrusion pathway. Grant Lidren
6/19/2017 Update or Other Action On this date, ADEC sent an email to ARRC following up on a letter sent to ARRC on May 17, 2017. The letter requested ARRC’s response on how it will investigated vapor intrusion of TCE at ARRC GW-1 within 30 days. ADEC requests ARRC’s response. Grant Lidren
6/23/2017 Update or Other Action On this date, ADEC received a response from ARRC from a letter titled: "ARRC-Anchorage Terminal Reserve GW-1; Vapor Intrusion Investigation" dated June 23. 2017 Grant Lidren
7/26/2017 Update or Other Action ADEC discussed with ARRC the need for more data. ARRC will respond to the ADEC request. Grant Lidren
9/1/2017 Update or Other Action On this date, received the letter titled: ARRC - Anchorage terminal Reserve GW-1; Vapor Intrusion Investigation submitted by ARRC. Grant Lidren
1/4/2018 Meeting or Teleconference Held meeting with ARRC and Geosphere on this date. Based off the meeting, Geosphere will submit a draft final work plan. Field work is scheduled for March 2018 Grant Lidren
3/9/2018 Site Characterization Report Approved ADEC received the Letter Report for Groundwater Sampling within the ARRC Anchorage Terminal Reserve Whitney Road, Anchorage, Alaska ADEC File # 2100.38.447, Hazard ID 4074 Rev. 1.3 submitted by RSE and dated March 9, 2018. Eleven monitoring wells were proposed to be sampled within the Anchorage Terminal Reserve: MWB17, DPB21, MW24, MWB09, MWA05, MWA07, DPB04, DPA32, MWA22, MWE05, and MWE06. Two of these wells, DPB21 (GW-1) and MWE05 (GW-7), were not sampled due to poor well condition and free product respectively. These 11 MWs are half the wells on the property, the remaining wells will be sampled in 2018. Monitoring wells MW24 (GW 2/3) and MWE06 (GW-7) produced purge water emitting strong hydrocarbon odor. Monitoring well MWA07 (GW-6) produced purge water with visible sheen. Monitoring wells MWA07 (GW-6) and MWE06 (GW-7) contained DRO of 2.42 mg/L and 27.6 mg/L respectively exceeding the ADEC Table C Groundwater Cleanup Level (GCL) of 1.5 mg/L. Sampling of monitoring wells MWA05 (GW-6) and MWE06 (GW-7) contained RRO of 2.42 mg/L and 3.17 mg/L respectively exceeding the GCL of 1.1 mg/L RRO. Monitoring well MWE06 (GW-7) contained 1,2,4-trimethylbenzene at 117 ug/L exceeding the GCL of 15 ug/L and naphthalene at 270 ug/L exceeding the GCL of 1.7 ug/L. Sample MWB17 (GW-1) contained chloroform at 2.90 ug/L above the GCL of 2.2 ug/L chloroform and trichloroethylene(TCE) at 14.7 ug/L exceeding the GCL of 2.8 ug/L. Monitoring well DBP04 (GW-4) contained vinyl chloride at 1.27 ug/L exceeding the GCL of 0.19 ug/L.MWA05 (GW-6) contained cadmium (25.3 ug/L) and vanadium (180 ug/L) each exceeding the respective GCL of 9.2 ug/L cadmium and 86 ug/L vanadium. This well had evidence of compromise, with an exposed wellhead that may have contributed to groundwater being exposed to external conditions and should be decommissioned. Grant Lidren
3/15/2018 Site Characterization Workplan Approved On this date, ADEC received the Indoor Air and Subslab Soil Gas Assessment Work Plan, for Karen’s RV and Taylor Leasing submitted by Geosphere and dated March 1, 2018. Grant Lidren
1/22/2019 Site Characterization Report Approved On this date, ADEC received the Indoor Air and Subslab Soil Gas Assessment Report, for Karen’s RV and Taylor Leasing (ARRC lease properties LP-072 and LP-125, respectively) submitted by Geosphere and dated January 22, 2019. Seven subslab soil gas and seven indoor air samples were collected from Karen’s RV and Taylor Leasing and analyzed for radon (as a surrogate indicator of building attenuation factors) and VOCs. The indoor air samples contained TCE up to 0.95 ug/m^3 and PCE up to 14 ug/m^3 which is below the ADEC residential target levels of 2.0 ug/m^3 and 41 ug/m^3 respectively for indoor air. The subslab gas samples contained TCE up to 1,600 ug/m^3 at Karen’s RV and TCE up to 2,100 ug/m^3 at Taylor Leasing which is above the commercial target level of 84 ug/m^3 for subslab soil gas. However, based on the attenuation factor calculated from an average of the subslab radon results, both Karen RV and Taylor leasing are below subslab gas commercial target levels( note: If instead of averaging the radon results and instead multiply the 2009 maximum TCE soil gas concentration at Taylor’s leasing (3,900 ug/m3) by the measured attenuation factor (5.3 x10-4), you get a predicted indoor air level of 2.067 ug/m3 which is slightly below the commercial target level for TCE but above the residential level). Grant Lidren

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details

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

Public Notices  •  Regulations  •  Statutes
Press Releases  •  Contact

 

State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
TDD: 800-770-8973
Physical Location: 410 Willoughby