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Under the previous ADEC HSACM term contract, the same Ahtna Team of Leslie Davis, Rodney Guritz, and Andrew Weller successfully executed site characterization at the Tanana Community Hall site under the DBAC program. Andrew Weller managed the project for the Ahtna Team, and Bill O’Connell managed the project on behalf of the ADEC.

Objectives of the site characterization were to delineate the extents of soil contamination, evaluate impacts to groundwater, and discern if piping from the former Bunker C tank farm to a header on the riverbank remained. Leslie Davis and Rodney Guritz shared Work Plan writing duties. Mr. Guritz made the initial site visit where he investigated the fuel piping, made contacts for backhoe rental and operator, and located buried utilities. The Ahtna Team was able to cost-effectively complete the soil and groundwater investigation using a combination of deep borings and temporary groundwater wells installed by a direct push drilling rig and shallow test pits using a City of Tanana-owned backhoe. Ahtna leveraged its relationship with a drilling subcontractor to obtain a reduced mobilization rate to Tanana because the drill rig was being barged from downriver and happened to be en-route during the work plan phase. The Ahtna Team’s opportunistic use of the drilling rig provided the ADEC with a more thorough investigation with less surface disruption than a backhoe.

Leslie Davis and Rodney Guritz also shared reporting duties. They confirmed the southern portion of the site is primarily impacted by a two to six-inch thick layer of Bunker C contamination from approximately 0.5 to 1.5 ft bgs that showed little response to PID screening of headspace vapors. They also reported an area in the northwest portion of the site with low PID response, no visual signs of contamination, and elevated DRO and RRO concentrations. Mr. Guritz utilized his relationship with the analytical laboratory by asking them to evaluate the chemical signature of the DRO and RRO results. They concluded the signature was consistent with a lube oil. Mr. Guritz consulted with his contacts in the ADEC SWP when drafting remedial alternatives in the recommendations system of the report. He recommended analyzing the leachability potential of the Bunker C and lube-oil contaminated soils – which is a major component of this scope of work.

Under the previous ADEC HSACM term contract, the same Ahtna Team of Leslie Davis, Rodney Guritz, and Andrew Weller successfully executed site characterization at the Tanana Community Hall site under the DBAC program. Andrew Weller managed the project for the Ahtna Team, and Bill O’Connell managed the project on behalf of the ADEC.

Objectives of the site characterization were to delineate the extents of soil contamination, evaluate impacts to groundwater, and discern if piping from the former Bunker C tank farm to a header on the riverbank remained. Leslie Davis and Rodney Guritz shared Work Plan writing duties. Mr. Guritz made the initial site visit where he investigated the fuel piping, made contacts for backhoe rental and operator, and located buried utilities. The Ahtna Team was able to cost-effectively complete the soil and groundwater investigation using a combination of deep borings and temporary groundwater wells installed by a direct push drilling rig and shallow test pits using a City of Tanana-owned backhoe. Ahtna leveraged its relationship with a drilling subcontractor to obtain a reduced mobilization rate to Tanana because the drill rig was being barged from downriver and happened to be en-route during the work plan phase. The Ahtna Team’s opportunistic use of the drilling rig provided the ADEC with a more thorough investigation with less surface disruption than a backhoe.

Leslie Davis and Rodney Guritz also shared reporting duties. They confirmed the southern portion of the site is primarily impacted by a two to six-inch thick layer of Bunker C contamination from approximately 0.5 to 1.5 ft bgs that showed little response to PID screening of headspace vapors. They also reported an area in the northwest portion of the site with low PID response, no visual signs of contamination, and elevated DRO and RRO concentrations. Mr. Guritz utilized his relationship with the analytical laboratory by asking them to evaluate the chemical signature of the DRO and RRO results. They concluded the signature was consistent with a lube oil. Mr. Guritz consulted with his contacts in the ADEC SWP when drafting remedial alternatives in the recommendations system of the report. He recommended analyzing the leachability potential of the Bunker C and lube-oil contaminated soils – which is a major component of this scope of work.

Client

Alaska Department of Environmental Conservation

Value

$36,000

Location

Tanana, Alaska

Period of Performance

8/1/2016 – 3/6/17

Categories: Environmental