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Site Report: CBJ Capital Transit Bus Barn

Site Name: CBJ Capital Transit Bus Barn
Address: 10099 Bentwood Place, Juneau, AK 99801
File Number: 1513.26.022
Hazard ID: 24545
Status: Active
Staff: Alena Voigt, 9072697556 alena.voigt@alaska.gov
Latitude: 58.369346
Longitude: -134.608781
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

In 1995, six test pits were advanced in a site assessment for a closure by removal of regulated underground storage tanks (USTs) and petroleum contamination of soil was identified. Although 524 tons of contaminated soil was recovered during the excavation to remove the USTs, the limits of impacted soil were not found in the interim removal action. Release investigation found that concentrations of gasoline and diesel hydrocarbon fractions in soil at the limits of excavation were an order-of-magnitude above migration to groundwater cleanup screening levels. The concentration and proximity of the residual soil contamination to the southern property line indicated that petroleum could be migrating off-site but groundwater was not investigated for contamination. For more information, see site file 1513.38.100.

Action Information

Action Date Action Description DEC Staff
10/25/1995 Site Added to Database Former Staff
10/25/1995 Leaking Underground Storage Tank Release Confirmed - Petroleum Leaking Underground Storage Tank (LUST) Site created in Contaminated Sites database (CSP) for source area ID 77601 ADD; Active. Former Staff
10/26/1995 Leaking Underground Storage Tank Cleanup Initiated - Petroleum LCAU; 524 tons of contaminated soil were removed from site during tank closure and were thermally remediated in Channel incinerator. Perforated piping installed for bioventing remediation same date at 12 ft depth. : LCAU date changed database conversion Former Staff
11/20/1997 Update or Other Action ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: CITY & BOROUGH OF JUNEAU (CBJ). Former Staff
10/2/2001 Update or Other Action Changed Project Manager from Paul Horwath to Bill Janes Cynthia Pring-Ham
3/7/2002 Update or Other Action Project Manager changed from Bill Janes to Bruce Wanstall. Bruce Wanstall
3/7/2002 Update or Other Action File review for status. Letter drafted requesting additional release investigation. Site visit to inspect location of soil aeration stand pipe. Located at property line approximately 10 feet in height; does not appear to present any hazard. Bruce Wanstall
3/7/2002 Update or Other Action Ranking for groundwater changed from 0.4 to 1 to reflect presence of groundwater contamination. Bruce Wanstall
5/8/2002 Potentially Responsible Party/State Interest Letter Notice of Intent to Cost Recover sent to CBJ. Bruce Wanstall
6/14/2002 Update or Other Action Check received from CBJ for Department project management expenses $488.93. Bruce Wanstall
11/18/2004 Update or Other Action File review after discussion of site with owner representative; passive soil aeration system should reduce impacts to groundwater. Bruce Wanstall
1/11/2007 Exposure Tracking Model Ranking Baseline ETM ranking complete. Evonne Reese
8/20/2007 Update or Other Action Develop a priority site list for CBJ Engineering and request ground water investigation at each of six leaking underground storage tank sites Bruce Wanstall
2/10/2009 Exposure Tracking Model Ranking A new updated ranking with Exposure Tracking Model (ETM) has been completed for source area 77601 diesel and gasoline underground storage tanks (USTs). The data gap for historical contamination is the lack of a groundwater investigation and search of residential area for potable wells. This uncertainty rates a high risk potential for human health exposure and can be solved without great expense to the CBJ. The 1995 UST Release Investigation mentions anecdotal evidence of buried cars and drums on the property, however, throughout the test pit investigation (6 sites) and excavation to remove the leaking USTs and contaminated material, no debris was encountered to support adding another release source for investigation. Bruce Wanstall
2/11/2009 Update or Other Action ADEC requested by letter to the Director of CBJ Engineering for site investigation of groundwater related to high concentrations of residual petroleum contamination of soil from regulated underground storage tanks. Bruce Wanstall
6/17/2015 Potentially Responsible Party/State Interest Letter DEC sent by electronic mail to the City and Borough of Juneau Director of Finance, a standard notification of liability for the contamination identified at the CBJ – Capital Transit Bus Barn site located at 10099 Bentwood Place in Juneau. Because CBJ is documented as the current managing owner/operator of the site, CBJ is identified to be financially responsible or liable under AS 46.03.822 (Strict Liability for the Release of Hazardous Substances) for the investigation and cleanup of any hazardous substance contamination that might be present. Consultant for the CBJ, Carson Dorn Inc., plans to submit a site investigation work plan for the Site in 2015 for DEC approval. The effort is ongoing phased-approach project to complete the cleanup process for these last few of many petroleum release events that began in the late 1990s with decommissioning the CBJ underground tanks. Bruce Wanstall
7/30/2015 Document, Report, or Work plan Review - other The Carson Dorn Inc. Sampling and Analysis Plan to investigate soil and groundwater for contamination at the CBJ Capital Transit Bus Barn is approved to proceed without comment from DEC. Bruce Wanstall
6/7/2016 Site Visit Site visit to inspect contaminated soil stockpile and wells Bruce Wanstall
12/27/2017 Update or Other Action Requested a work plan certified mail this date. Danielle Duncan
6/22/2018 Update or Other Action According to a consultant, a work plan is in the works. Danielle Duncan
2/6/2019 Update or Other Action Per Cox Environmental, a work plan will be rec'd soon. Danielle Duncan
4/4/2019 Update or Other Action Refer to file # 1513.38.100 for updates/actions for this site. Danielle Duncan
5/3/2019 Update or Other Action Per the consultant - the fieldwork is complete. Danielle Duncan
1/17/2020 Document, Report, or Work plan Review - other Reviewed the Sampling and Analysis Plan (SAP), dated January 2020. The plan proposes to install additional soil borings and monitoring wells in an effort to better characterize the site. the plan was approved with comments. Joshua Barsis
7/1/2020 Document, Report, or Work plan Review - other On July 01, 2020 ADEC received "Groundwater Monitoring Report Capital Transit Building and Capital Transit Bus Barn Sites." The report summarizes the results of groundwater sampling activities. GRO was detected in MW-1 at a concentration of 0.25 mg/L. DRO was detected in two out of the three samples at concentrations ranging from 0.11 (MW-1) - 1.0 mg/L (MW-3). Rachael Petraeus

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details
Hazard ID Site Name File Number
26561 CBJ Capital Transit Building 1513.38.100

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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