Problems/Comments

The Kodiak Council on Alcoholism contaminated site property was formerly occupied by an outpatient addiction treatment program and was recently transferred to the Native Village of Afognak. The site is located in Section 32, Township 27 South, Range 20 West, and the Seward Meridian. A Phase I Environmental Site Assessment (ESA), of the property was completed in September 2006 and reported that a heating fuel Underground Storage Tank (UST) was decommissioned at the subject site in 2005. The UST formerly supplied heating oil to the onsite structure and was reportedly closed in-place near the northeast east wall of the structure. No records or documentation exist for the initial in-place closure. On December 7, 2006, a Limited Phase II ESA was performed to determine if a petroleum release had occurred prior to the in-place closure. During investigations, the top of the UST was discovered at roughly three feet below ground surface (bgs). Results of the Phase II revealed that petroleum contamination, primarily Diesel Range Organics (DRO) was present in the sub-surface soils at levels ranging between 3,780 mg/kg to 7,540 mg/kg, which exceeded the DRO, ADEC Migration to Groundwater (MTG) cleanup level of 230 mg/kg. In September 2006 a Phase I ESA was conducted and submitted to KeyBank. It was found that a former heating oil UST was removed, and the closure and removal procedure did not produce a closure data report. December 7, 2006 a Phase II ESA was conducted, and an excavation was performed to determine if a petroleum release had occurred prior to the in-place closure. This revealed that a 1,000-gallon heating fuel UST was closed in place in 2005. It was reported that soil samples had been collected, but no analytical data could be found. It was determined that the site was excavated only enough to decommission the tank, so soil samples may not have been collected. During the excavation, the top of the UST was discovered at roughly three feet bgs. The excavation continued to the north, east, and south until the base of the UST was uncovered, which was at roughly eight feet bgs. Holes and pitting were noted in the bottom of the former UST. During the investigation, groundwater was encountered at various depths, primarily between six and 7.5 feet bgs. Prior to backfilling with the excavated material, three soil samples were collected from the base of the excavation and were analyzed for DRO, GRO, RRO, and BTEX. Results of the 2006 Phase II revealed that petroleum contamination, primarily DRO, was present in the sub-surface soils at levels ranging between 3,780 mg/kg to 7,540 mg/kg, which exceed the ADEC migration to groundwater cleanup level for DRO of 230 mg/kg. Perched water was encountered between six to 7.5 feet bgs. The highest contaminant levels were located at about eight feet bgs, the level of the bottom of the UST. In May 2019 site characterization activities were conducted and generally consisted of a UST removal, test pit excavations, groundwater monitoring well installation, and sampling of groundwater and soil. All soils samples were analyzed for DRO and GRO. Most soils samples were analyzed for BTEX. A handful of samples were analyzed for PAHs and VOCs. The handful of samples included are TP1-49, TP1-X, UST-127, UST-136, SP-3, UST-2X, UST, UST-X, TP2, and TP3. Soil samples UST-143 and TP3-67 exceeded Migration to Groundwater for DRO. Soil samples USTX and UST127 exceeded Migration to Groundwater for DRO and a few other PAHs and VOCs. Sample UST2X exceeded Migration to Groundwater for various PAHs and VOCs. Groundwater sample USTX exceeded for DRO at 6.94 µg/L, Naphthalene at 23.8 µg/L, 1-and Methylnaphthalene at 11.9 µg/L. All groundwater samples were analyzed for DRO, GRO, PAHs, and VOCs. Groundwater sample UST exceeded for DRO at 7.16 µg/L, Naphthalene at 24 µg/L, and 1-Methylnaphthalene at 15.1 µg/L. Groundwater sample TP3 exceeded for DRO at 1.71 µg/L. In August 2020 site characterization activities were conducted and generally consisted of test pit excavation and soil sampling. TP4A, TP4B, and TP5 were excavated and sampled. All soils samples were analyzed for DRO, GRO, PAHs, and VOCs. Soil samples RSE-9(TP4A), RSE-15(TP4B), RSE16 (TP4B), and RSE-22(TP5) exceeded Migration to Groundwater for various PAHs and VOCs. RSE-XX(TP4B) exceeded Human Health cleanup levels for 1,2-Dibromoethane and MTG cleanup levels for various PAHs and VOCs.

Action Information

Contaminant Information

Control Type

Requirements

No associated sites were found.