Client: USACE Alaska
Location: Amchitka Island, Aleutian Islands, Alaska
Completion Year: 2019
Scope of Work:
Brice conducted site investigations and soil and hazardous materials sampling/surveying at 11 containerized HTRW (CON/HTRW) sites at the Amchitka Air Force Auxiliary Field Formerly Used Defense Site (FUDS) to confirm the presence or absence of tanks and any associated piping and soil contamination. The purpose of the SI was to move the CON/HTRW sites towards underground storage tank (UST) permanent closure. We first collected historical information including historic aerials, as builts, previous investigation reports, and site photographs and completed a historical geospatial analysis at each tank site. We then conducted a site visit to establish ground control for geo-referencing features in the GIS. We conducted site reconnaissance using electric bikes. Brice then developed a project GIS to ensure successful identification of the 11 tank locations.
Brice addressed GRO, DRO, RRO, VOC, PAH and total lead in soil at the tank locations.
During the field investigation, we used both invasive and non-invasive means to confirm tank locations. We performed geophysical surveys using EM61 and ground penetrating radar to locate tanks where site information was questionable. We used an excavator and performed directional drilling with a Brice-owned Geoprobe to locate tanks and collect analytical samples. Where tanks were found, we conducted inspections to document the location and condition of the tank as well as any contents. If no tank was found, we performed extensive investigation and documentation to reconfirm and allow for site closure. Tank and sample locations, areas of stained soil and/or stressed vegetation, or other areas of potential interest were surveyed to ensure that these features can be re-located for future fieldwork. Brice successfully confirmed the presence/absence of tanks at all 11 sites.
- Received “Very Good” CPARS ratings on Interim CPARS dated 08/06/2018
- Saved $15K by implementing an innovative technology to facilitate the identification of tank locations due to lack detailed historic maps and images, saving three days in field time
- Completed fieldwork on schedule despite weather delays (common in the Aleutian Islands)
- Worked over 3,964 hours without an OSHA Recordable