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Site Report: Juneau Community Building

Site Name: Juneau Community Building
Address: 150 3rd (Third) Street, Juneau, AK 99801
File Number: 1513.38.075
Hazard ID: 4461
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 58.301473
Longitude: -134.409479
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

During foundation work and removal of an abandoned underground heating oil tank in 2007, workers discovered petroleum contaminated soil. Environmental consultant Carson Dorn Inc (CDI) collected samples from remaining soil for laboratory analysis and the highest DRO level detected was 13,300 milligrams per kilogram. At DEC’s request CDI installed two water wells for groundwater investigation. Initially petroleum odor was noticeable in both wells but sheen was not observed. In 2010 and 2012 DEC contractors examined wells MW2E and MW2W but in 2010 could only obtain a sample from well MW2W and in 2012 were able to collect samples from both the wells for laboratory analysis. Results for BTEX, GRO, DRO and RRO in the 2010 sample were below instrument detection. In 2012 DEC reduced the analyte list to only DRO and RRO. The results available from the laboratory for the well MW2W sample and field duplicate and the well MW2E sample were between instrument detection and the lab reporting limit and are considered estimated values due to matrix interference.

Action Information

Action Date Action Description DEC Staff
10/1/2007 Spill Transferred from Prevention Preparedness and Response Program Site transferred by PERP staff Scot Tiernan. Spill No. 07119914101; Spill Date = 5/21/07; Substance = Diesel; Quantity ~99 gallons; PERP File No. = 1513.02.324. Mitzi Read
10/3/2007 Exposure Tracking Model Ranking Initial ranking completed. Mitzi Read
10/3/2007 Site Added to Database Site added to the database. Mitzi Read
2/21/2008 Long Term Monitoring Established In May 2007, petroleum contaminated soil and water were encountered during foundation waterproofing on the south side basement wall. Accessible contaminated material was removed and monitoring wells were installed at each end of the excavation. Long term cleanup oversight will be accomplished by periodic testing of well water and insertion of oxidation compound to promote natural attenuation of petroleum trapped under the building foundation. Bruce Wanstall
4/2/2008 Update or Other Action The Juneau Community Building and Dimond Courthouse sites are in long term monitoring for residual soil and groundwater contamination on the two properties. A sampling event of the monitoring wells is proposed for FY08 and will be completed when funding is available. Bruce Wanstall
4/3/2009 Update or Other Action The Juneau Community Building and Dimond Courthouse sites are in long term monitoring for residual soil and groundwater contamination on the two properties. A sampling event of the monitoring wells is proposed for FY09 and will be completed when funding is available. Bruce Wanstall
7/2/2010 Document, Report, or Work plan Review - other ADEC evaluation of the letter-report titled Groundwater Sampling, Juneau Community Building, 150 3rd Street, Juneau, Alaska by Shannon &Wilson finds the data meet field and laboratory quality assurance criteria. Two on-site wells both of which were previously identified as MW-2 are now designated as MW2E (east) and MW2W (west). Facing the front of the building looking north, the well on the left is MW2W and on the right is MW-2E. Both wells are surface mounted and appeared in good condition at the time of sample collection on June 8, 2010. An electronic water-level indicator measured water levels in each well; MW2E was unable to be purged due to low water volume and therefore was not sampled. MW2W was purged and when sufficiently recharged and stabilized, water samples were collected. Sample and duplicate were laboratory analyzed for benzene, toluene, ethylbenzene, total xylenes (BTEX) and gasoline, diesel and residual hydrocarbon fractions (GRO,DRO, & RRO). Concentrations of these analytes in the samples were either below instrument detection or below 18 AAC 75.345 Table C screening levels. Bruce Wanstall
12/30/2010 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 75448 Petroleum - Unknown Source. Bruce Wanstall
3/31/2012 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 75448 Petroleum - Unknown Source. Bruce Wanstall
9/4/2012 Site Visit Site visit to check the status of investigation derived waste (purge water) stored at the site from the two SOS sampling event in FY12 by Shannnon & Wilson. The IDW was not observed and well caps are secure. Bruce Wanstall
1/16/2013 Document, Report, or Work plan Review - other A groundwater sampling draft report arrived by email for the June 2012 sampling event. The final report on CD is forthcoming from Shannon & Wilson. Well productivity was low but sufficient; the west well had detectable DRO and RRO below Table C cleanup levels and the east well had DRO and RRO above Table C cleanup levels. QA/QC was marginal but acceptable; low sample volume affected the outcome of the silica gel treated samples. Bruce Wanstall
4/9/2014 Document, Report, or Work plan Review - other DEC approved the 2013 monitor well sampling report by Shannon & Wilson for final payment. Bruce Wanstall
4/11/2014 Institutional Control Record Established Institutional Controls established and entered into the database. Bruce Wanstall
4/11/2014 Cleanup Complete Determination Issued In accordance with 18 AAC 75.335 (b) (2), the concentration and extent of contamination has been determined to the maximum extent practicable at the UST site as referenced in the decision document. Soil contamination remaining in a subsurface soil layer on the referenced property is limited, stable and does not present an unacceptable risk to human health or the environment. The department approves closure for this site in accordance with 18 AAC 75.380, subject to institutional controls under 18 AAC 75.375, as outlined in this database record, the decision document and in a Notice of Environmental Contamination recorded on the property. These controls are necessary to ensure that soil contamination encountered during construction or other disturbances in the future is properly managed, and that current and future landowners or operators on the impacted properties are notified and aware. Bruce Wanstall
4/11/2014 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 75448 Heating Oil Supply Tanks. Bruce Wanstall
10/9/2014 Institutional Control Compliance Review IC compliance review conducted and staff changed from Bruce Wanstall to IC Unit. Reminder system set to follow-up with responsible party in 2019. Also following-up with former project manager on the groundwater monitoring well decommissioning requirement that was outlined as an institutional control in the decision document. Kristin Thompson
11/19/2014 Institutional Control Update An IC reminder letter was issued to the responsible party on this date. Kristin Thompson
12/24/2014 Document, Report, or Work plan Review - other ADEC staff reviewed Nortech's "Juneau Community Building Well Decommissioning" report dated December 17, 2014. The two groundwater monitoring wells cited in the Cleanup Complete Determination (MW2E and MW2W) have been decommissioned in accordance with DEC guidance. Kristin Thompson
6/15/2016 Institutional Control Compliance Review An IC compliance review was conducted. A letter requesting the signed ICs Agreement and Signature Page was issued to the responsible party on this date. Kristin Thompson
6/17/2016 Institutional Control Update Received the signed ICs Agreement Page on this date. Kristin Thompson
6/14/2019 Institutional Control Update An Institutional Controls reminder letter was e-mailed to the responsible party on this date. Mossy Mead
12/19/2019 Institutional Control Update It was brought it our attention on this date that the Notice of Environmental Contamination document filed during the closure process was filed under the wrong property owner's name. A corrected document has been provided to the DNR Recorder's Office and should be re-recorded in the near future. Evonne Reese
1/3/2020 Update or Other Action Received the corrected recorded Notice of Environmental Contamination from the Recorder's Office on this date. This document has been uploaded to this database record. The recording number is 2019-005011-0. Evonne Reese
8/7/2024 Institutional Control Compliance Review IC compliance review completed on this date. An IC reminder letter was e-mailed to the landowner. The next review will be in five years’ time. Gaige Robinson

Contaminant Information

Name Level Description Media Comments
DRO > Human Health/Ingestion/Inhalation Soil Two confirmation soil samples out of eleven exceeded the DRO ingestion level of 8,250 and a third nearly did. The highest DRO level detected was 13,300 mg/kg in the sidewall of the west side excavation.

Control Type

Type Details
Notice of Environmental Contamination Since petroleum contamination remains in subsurface soil on the Juneau Community Building property above approved cleanup levels, institutional controls are necessary to ensure there is no unacceptable risk to human health or the environment, now and in the future. A Notice of Environmental Contamination (deed notice) shall be recorded in the State Recorder’s Office as an institutional control (IC) that identifies the nature and extent of contamination at the property and the conditions that current and future owners and operators are subject to.
Signed CS Determination By signing the closure determination agreement, it is the responsibility of the owner/operator/land manager to maintain the terms of the Institutional Controls as stipulated in the signed agreement. If land use and/or ownership changes, the management conditions stated in the closure determination document may not be protective and DEC may require additional remediation and revised conditions.

Requirements

Description Details
When Contaminated Soil is Accessible, Remediation Should Occur When contaminated soil becomes accessible submit a work plan for DEC approval: Sub-surface soil contamination is located near the foundation of the Juneau Community Building and in the utility corridor as shown in Drawings 1 and 2 in the closure determination document as Attachment C: Site Map. When the building is removed and/or the soil becomes accessible, the soil must be evaluated and contamination addressed in accordance with a DEC approved work plan.
Restricted to Industrial / Commercial Land Use The Department of Administration Division of General Services (DGS) shall report to DEC every five years to document land use is unchanged, or report as soon as the DGS becomes aware of any change in land ownership and/or use, if earlier. The report can be sent to the local DEC office or electronically to DEC.ICUnit@alaska.gov
Excavation / Soil Movement Restrictions Any proposal to transport soil or groundwater off-site requires DEC approval in accordance with 18 AAC 7.325(i). A “site” [as defined by 18 AAC 75.990 (115)] means an area that is contaminated, including areas contaminated by the migration of hazardous substances from a source area, regardless of property ownership.
Groundwater Use Restrictions Installation of new groundwater wells requires DEC approval.
Advance approval required to transport soil or groundwater off-site. Standard condition.
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) Standard condition.
Hazard ID Site Name File Number
3857 Dimond Courthouse UST-Juneau 1513.38.049

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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