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Site Report: ADOT&PF Kalsin Bay Maintenance Station Class V Injection Well

Site Name: ADOT&PF Kalsin Bay Maintenance Station Class V Injection Well
Address: MP 31.1 Chiniak Highway; ~11 Miles SSE of Kodiak, Kodiak, AK 99615
File Number: 2601.38.116
Hazard ID: 26430
Status: Active
Staff: Grant Lidren, 9072698685
Latitude: 57.588858
Longitude: -152.436003
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.


The Alaska Department of Transportation and Public Facilities (ADOT&PF) Kalsin Bay Maintenance Station, constructed in 1972, included one Class V injection well connected to three floor drains inside the facility. The drains were used for the disposal of motor vehicle waste fluids. The facility burned down on August 30, 2014. In November 2014 tetrachloroethylene, trichloroethylene, arsenic, and chromium were detected in subsurface soil above DEC cleanup levels. Arsenic and lead were also detected above the DEC cleanup levels in water from a reportedly non-potable well on site. There are plans to construct a new facility on the same site.

Action Information

Action Date Action Description DEC Staff
4/30/2007 Update or Other Action Note: this entry is just for historic information. On April 30, 2007, 35 to 50 gallons of diesel fuel spilled during fueling activities. Contaminated soil was excavated and four confirmation soil samples collected and analyzed for DRO were below ADEC cleanup levels. PPRP (f.k.a. PERP) closed the site with no further action on May 3rd, 2007 (PERP spill#: 07249912001 Kodiak DOT Fuel Spill) No Longer Assigned
6/30/2015 Update or Other Action On this date, ADEC received the Class V Well Closure Report Kalsin Bay Maintenance Station Kodiak Alaska submitted by DOT&PF M&O, dated June 30, 2015. Drinking water and soil samples were collected to characterize the Class V Well. Two soil samples were collected 12 feet bgs below the point of discharge in the seepage pit area and analyzed for VOCs, SVOCs, and metals. The soil samples contained PCE up to 0.0760, TCE up to 0.220, arsenic up to 9.22 mg/kg, and chromium up to 37.1 mg/kg. A drinking water sample collected out of the reportedly non-potable drinking water well contained lead up to 0.0721 mg/L and arsenic up to 0.110(which is a magnitude above the arsenic GW cleanup level of 0.010 mg/L). Geotech testpits advanced encountered groundwater at 5 feet bgs.Note: Report not approved by ADEC. Grant Lidren
8/10/2015 Site Added to Database A new site has been added to the database Mitzi Read
8/11/2015 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79803 name: Class V Injection Well Mitzi Read
3/9/2016 Site Characterization Workplan Approved On this date, ADEC received the Final Work Plan Alaska DOT&PF Kalsin Bay Maintenance Station submitted by R&M and dated March 2016. Grant Lidren
5/19/2016 Site Characterization Report Approved On this date, ADEC received the Limited Phase I Environmental Site Assessment and Site Investigation Alaska DOT&PF Kalsin Bay Maintenance Station submitted by R&M and dated May 2016. Soil investigation included advancing and logging 11 test pits, field screening, and analytical sample collection. Temporary monitoring wells (TMW) were installed in three of the test pits, two in the vicinity of the former Class V injection well and one within the proposed building footprint. Two soil samples were collected from each test pit from the GW interface and soil type interface. At the proposed building footprint, soil samples collected from testpits TP1 through TP9 at a depth of 0.2 to 4.5 feet bgs at the GW interface contained arsenic up to 14.1 mg/kg and chromium up to 34.8 mg/kg. Groundwater samples collected at this location from a temporary well point and the non-potable drinking water well contained lead up to 0.0781 mg/kg, arsenic up to 0.0444 mg/L, and chromium up to 0.101 mg/L(note: these GW samples were brown and light brown in color). At the class V injection well, two testpits were advanced and completed as temporary monitoring wells. TP10 was advanced 50 feet northwest and TP11 was advanced at the injection well discharge point. Heavy petroleum sheen on groundwater and odor were noted at 3.5 feet bgs at TP11 located at the injection well discharge pipe. Soil samples collected from TP11 at a depth of 4.5 to 5.5 feet bgs contained PCE up to 0.0549 mg/kg, arsenic up to 8.30 mg/kg, and chromium up to 29.4 mg/kg. Groundwater collected from a temporary well point from this location did not contain contaminant concentrations above cleanup levels(note: this GW sample was clear in color). Soil samples collected from TP-10 at a depth of 1.0 to 3.2 feet bgs contained arsenic up to 6.92 mg/kg and chromium up to 30.4 mg/kg. Groundwater collected from a temporary well point from this location contained lead up to 0.314 mg/L, arsenic up to 0.0141 mg/L and chromium up to 0.0604 mg/L(note: this GW sample was light brown in color). Grant Lidren
10/13/2016 Site Characterization Report Approved On this date, ADEC received the Class V Injection Well Closure Report Alaska DOT&PF Kalsin Bay Maintenance Station submitted by R&M dated October 13, 2016. Groundwater was sampled and the Class V injection well components (piping, insulation, and timber cribbing) were removed along with overburden soil and soil from immediately adjacent to system components. The system was located primarily at or below the groundwater interface. System piping consisted of 4-inch diameter cast iron pipe that discharged into an eight-foot by eight-foot lumber crib that was approximately six feet deep. The top of the log crib was at approximately four feet below ground surface. Groundwater was observed 2 to 4 feet bgs. Two stockpiles were created: stockpile C presumed clean soil and stockpile D presumed dirty. Soil from above the piping was put in stockpile C. Soil from around the lumber crib were placed in storage Cell D. Soil excavated at or below lumber crib had a petroleum odor and a sheen was observed on the groundwater. No sludge was encountered during the project. The excavation was limited vertically to 10 feet bgs due to severe sloughing of soil and groundwater. Eight confirmation soil samples collected from the sidewalls 4 feet bgs at the GW interface from the piping trench and seepage pit excavation contained DRO up to 26,800 mg/kg, naphthalene up to 0.0736 mg/kg and PCE up to 0.0382 mg/kg. Soil samples were not collected at the excavation floor due to groundwater. Three soil samples collected from stockpile C did not contain contaminant concentrations above ADEC cleanup levels. Three stockpile samples collected from stockpile D contained DRO up to 562 mg/kg and PCE up to 0.0350 mg/kg. Groundwater sampled from the TMW1, TMW2, TMW3, and TMW4 and analyzed for total metals, dissolved metals, and hexavalent chromium were detected but below cleanup levels. Note: the wells were sampled after 40 hours to prevent turbidity. Grant Lidren
12/28/2016 Update or Other Action DOT&PF anticipates to transfer the stockpiles located at the Kalsin Bay M&O Station to the landfill in late spring/early summer 2017, if by that time the Kodiak landfill is permitted to take DRO contaminated soil. If the landfill is not permitted by late spring/early summer 2017, the DOT&PF will place the stockpile on a 20mil liner across Franks creek at the NE end of the DOT material site until the landfill has acquired the permit. If for some reason the landfill does not receive the permit in 2017, the DOT&PF will work with ADEC to set up a land-farm schedule for the stockpile. Grant Lidren
1/19/2017 Update or Other Action The Class V injection well at this site was formally closed by EPA on this date. Bill O'Connell
4/18/2018 Offsite Soil or Groundwater Disposal Approved ADEC has no objections to the beneficial reuse of the “clean’’ soil along the highway. This “clean” soil is a combination of: • the overburden soil removed above the former UIC piping (aka stockpile C) and • a small amount of surface soil removed during excavation of the former building. About 90% of this material will be used for maintenance work along the highway from Middle Bay to Chiniak, (roughly Milepost 20 to Milepost 42) and other 10% will be used at the Kalsin Bay Facility. Grant Lidren
9/14/2018 Update or Other Action The Alaska Department of Environmental Conservation (ADEC) Contaminated Sites Program (CSP) has received and reviewed the Kalsin Bay Class V Stockpile Extension letter submitted by ADOT&PF dated September 10, 2018. ADEC has no objection to the continued storage of the 36 cubic yard stockpile(aka dirty stockpile D) for another 18 months contingent upon the following conditions: During storage, the stockpile must remain on the 20-mil liner, bermed, and covered securely with a 4-mil cover and ADEC must approve soil prior to transport. Grant Lidren
11/2/2018 Site Characterization Workplan Approved On this date, ADEC approved the Groundwater Investigation Work Plan Kalsin Bay dated November 1, 2018 submitted by R&M. Grant Lidren

Contaminant Information

Name Level Description Media Comments

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