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Site Report: Sitka Former Public Works

Site Name: Sitka Former Public Works
Address: 1300-1400 Halibut Point Road, Sitka, AK 99835
File Number: 1525.38.002
Hazard ID: 3284
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 57.064222
Longitude: -135.355028
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

Five buildings that were demolished and removed include a power plant and several vehicle repair shops. Analysis of soil samples collected at the site found trace level PCBs, DRO levels at 4,600mg/kg, VOC, SVOC, and total chromium above method two cleanup levels. Cleanup has been completed using ADEC approved site-specific alternative cleanup levels. A 1,000 gallon gasoline and a 1,000 gallon diesel UST were removed from the Northwest corner of the City Garage in 1993. A 500 gallon AST, a 4x4x6 sump with three 1-inch exit lines, two grease pits with lube rack, drum storage area, hazardous materials storage, parts washing (solvent) barrel, and former asphalt batch plant have been or are present on-site. Two 12,000 gallon USTs were located east of the Electric warehouse. One of the tanks had pinhole leaks when it was pulled in summer of 1989. 8x33 feet transformer pad is located west of warehouse. 1.5x1.5x3-feet-deep sump with 4-inch inlet and 3-inch outlet pipe was connected to diesel fuel storage tank plumbing and located at the southwest corner of warehouse. 10 residential properties are east of the site. Petroleum contaminated soil was encountered at this site on June 13, 2017 during site preparation work for construction of affordable housing units on this property. The property was previously transferred from the municipality to a non-profit organization. PPR staff were onsite to document the release. The potentially responsible party (non-profit organization) has been instructed to stop work in the area until a environmental consultant is hired and a work plan can be submitted for CSP review.

Action Information

Action Date Action Description DEC Staff
2/1/2001 Site Added to Database PCBs, Chromium and Heating Oil. Bruce Wanstall
2/1/2001 Site Ranked Using the AHRM Preliminary ranking. Trace level PCBs; chromium above cleanup levels. Bruce Wanstall
2/1/2001 Voluntary Cleanup Program NOI Acceptance letter sent to RP. Bruce Wanstall
1/17/2002 Update or Other Action Project tickler update - email sent to Hugh Bevan at Sitka Public Works asking for site status report. Bill Janes
1/18/2002 Update or Other Action Response from Hugh - Jim Clare is going to do the clean up supervision. Hugh turned in FY03. operating budgets on January 15th with funds requested to do the cleanup and demo the buildings. If the funds are approved they can start July 1. Bill Janes
2/23/2004 GIS Position Updated Updated lat/long data using GPS readings from Bill Janes 2/13/04 field trip. Cliff Walden
4/9/2004 Update or Other Action Email from Rich Riggs, CBS, discussing possibility of CBS selling property "as is where is." Bill Janes
10/22/2004 Update or Other Action Cleanup Action Plan received from Carson Dorn. Several cleanup alternatives presented but none specifically selected. A supplementary is required for approval once an option is selected. If CBS sells the property the new buyer will need to do this. Bill Janes
7/5/2006 Meeting or Teleconference Held Meeting held with CDI to examine data gaps in site investigation and remedial options for Tracts I & II, the former ADOT and City Shop USTs, the former power plant building, and the electrical shop buildings. Bruce Wanstall
11/3/2006 Cleanup Level(s) Approved Method 2 migration to groundwater. RP may request a method 3 later. Bill Janes
11/3/2006 Cleanup Plan Approved Petroleum contaminated soils to be bio-treated at Granite Creek quarry. PCB contaminated soil to be excavated and transported off-site. Cleanup workplan is in the electronic site file. Bill Janes
11/20/2006 Update or Other Action Conceptual Site Model received from consultant. Saved in pdf format in email this date in Outlook public folders. Bill Janes
1/19/2007 Update or Other Action Meeting with consultant to review results of first stage of cleanup. 80 cy stockpiled on site. Close to 200 cy taken to Granite Creek. Additional cleanup to commence within the next few months. Bill Janes
3/9/2007 Cleanup Plan Approved Amended cleanup plan approved. Bill Janes
3/9/2007 Cleanup Level(s) Approved Method 3 cleanup levels are approved as follows: GRO - 1,400 mg/kg DRO - 3,800 mg/kg RRO - 12,500 mg/kg These cleanup levels will result in a conditional closure with a long term management component both on-site and at the Granite Creek facility. If the soils are proposed to be disposed of elsewhere in the future additional treatment may be required to meet the unrestricted disposal cleanup levels (method 2 migration to groundwater). Bill Janes
7/12/2007 Cleanup Level(s) Approved Correction made to RRO cleanup level - from 12,500 ppm to 8,300 ppm based on July 2007 final cleanup report Bill Janes
7/19/2007 Exposure Tracking Model Ranking Deminimis exposure and incomplete pathways as a result of the recent cleanup. Jill Taylor
8/1/2007 Update or Other Action All structures have been removed and the site has been leveled. Runoff water from the hillside is diverted around the property in a ditch where it eventually enters the storm drain system. It discharges through a nearby small wetland and then into marine waters. The biocell has been constructed at the Granite Creek Quarry. No leachate was observed; the soil was last tilled at the end of June. No odors or visible signs of contamination present. Bill Janes
1/14/2008 Update or Other Action cleanup complete determination letter issued this date with site-specific method 3 migration to groundwater cleanup levels for DRO. Site will remain in "active" status until the Granite Creek quarry bioremedation stockpile soil reaches applicable cleanup levels(sampling required summer 2008). Pre-approval issued to use the soil for cover material at the nearby waste water sludge disposal area once cleanup levels have been met. Bill Janes
1/14/2008 Update or Other Action Database notification only for residual contamination at site-specific migration to groundwater cleanup levels Bill Janes
5/8/2008 Update or Other Action DRO/RRO sampling results for the Granite Creek stockpile received. FIve of the ten samples exceed method 2 but all samples are below the approved method 3 cleanup level. City given the option of further treatment and re-sampling or using the material as cover for the nearby biosolids disposal site. Bill Janes
10/15/2008 Cleanup Complete Determination Issued Granite Creek soil stockpile concentrations now below method 2 migration to groundwater cleanup levels. Bill Janes
4/1/2010 Update or Other Action Check Received $368.12 from Law 02/24/10 Traci Nebeker
6/14/2017 Site Reopened Petroleum contaminated soil was encountered at this site on June 13, 2017 during site preparation work for construction of affordable housing units on this property. The property was previously transferred from the municipality to a non-profit organization. PPR staff were onsite to document the release. The potentially responsible party (non-profit organization) has been instructed to stop work in the area until a environmental consultant is hired and a work plan can be submitted for CSP review. Sally Schlichting
7/6/2017 Update or Other Action Trenching for the water and sewer lines found petroleum contamination. A consultant has been working to characterize the area. Danielle Duncan
7/6/2017 Potentially Responsible Party/State Interest Letter Sent today~ Danielle Duncan
8/7/2017 Document, Report, or Work plan Review - other Site Assessment Report submitted by Nortech. DRO and RRO meet alternative cleanup levels throughout sewer and water trench and stockpiled soil; SVOCs are above cleanup levels in an area of the two trenches. Sally Schlichting
9/13/2017 Update or Other Action The digging on site for sewer and water lines has finished and there should be no more excavating on site while housing is built. Site-specific alternative cleanup levels (ACLs) approved in March 2007 for GRO, DRO, and RRO are 1,400, 3,800, and 8,300 mg/kg respectively. ACLs approved in September 2017 for BAA, BAP, BAF, and naphthalene are 1.7, 0.17, 1.7, and 19 mg/kg respectively. Danielle Duncan
9/22/2017 Document, Report, or Work plan Review - other All of the soil within the sewer and water line excavations meet the site-specific cleanup levels post-excavation. There is currently a stockpile of approximately 120 cubic yards of petroleum contaminated soil located on a liner and covered on site. I understand that options are under consideration for the remediation and disposal of the stockpiled soil. Danielle Duncan
9/22/2017 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 74259 USTs and Electrical Building. Danielle Duncan
10/20/2017 Update or Other Action The responsible party has decided to take the contaminated soil to Bicknell for remediation. Danielle Duncan
10/30/2017 Update or Other Action Sent a letter today to the responsible party outlining the exposure risks on site. Danielle Duncan
5/14/2018 Update or Other Action Received and approved a landfarm plan. Danielle Duncan
8/8/2018 Update or Other Action K and E Alaska, using the services of Republic Services, will remove the contaminated soil soon. Danielle Duncan
9/27/2018 Update or Other Action 159 tons of petroleum contaminated soil has been taken to Republic Services in Seattle for disposal. The ADEC transport document is in the site file. Danielle Duncan
12/27/2018 Cleanup Complete Determination Issued Danielle Duncan
12/27/2018 Institutional Control Record Removed Institutional Controls have been removed. Danielle Duncan
1/6/2022 Update or Other Action Spoke with a Sitka Land Trust representative on this date regarding this property which has been given to the Trust by the City to build affordable housing on. They were making sure that there were not any issues with putting in a water/wastewater system. I assured them that the site was completely closed with the final confirmation sampling in 2018 showing concentration below the Method 2 most stringent cleanup levels so they were free and clear to develop. There was also no history of groundwater contamination on this site. Evonne Reese

Contaminant Information

Name Level Description Media Comments
Benzo(a)anthracene < Method 2 Most Stringent Soil
Benzo(a)pyrene < Method 2 Most Stringent Soil
Benzo(b)fluoranthene < Method 2 Most Stringent Soil

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

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
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