3.0 Affected Environment - Knik Arm Bridge and Toll Authority

Knik Arm Crossing DraftFinal EIS
Affected Environment
Site 48 – Aurora North Fuel Sales
Site 48 is located at 1040 East 1st Avenue. Five USTs and 500 cubic yards of contaminated
soil were removed from the property in 1990. Since then, additional contaminated soil has
been removed and ground water contamination documented. An NFRAP letter was issued
and institutional controls were established in 2004. Ground water monitoring is ongoing and
contamination is known to extend off site to the north and west (toward the project search
corridors) (ADEC 2005a).
3.5.4.3.2 Erickson Alternative
Phase 1
The proposed Erickson Alternative would be affected by the same sites as the Degan
Alternative, primarily because access ramps and associated road improvements for the Degan
Alternative would affect Erickson Street. The primary difference is that the cut-and-cover
tunnel for the Erickson Alternative would be closer to Sites 2, 15, and 36 than the Degan
Alternative tunnel would be.
Phase 2
The proposed Ingra-Gambell Couplet for the Erickson Alternative would affect the same
sites as the Degan Alternative connection to the Ingra-Gambell Couplet.
For specific information on the ISA findings, ISA methodology, and identified hazardous
materials sites, refer to the Initial Site Assessment Technical Report (KABATA 2006o).
3.5.5 Energy Resources
There are currently no commercially feasible energy resources in the Study Area. Table 4-35,
in Section 4.5.5.4, shows expected 2010 vehicular fuel consumption for the Study Area under
the No-Action Alternative.
3.5.6 Ground Water Resources
3.5.6.1 The Mat-Su
Aquifers in the Mat-Su area are primarily situated within glacial till, glacial outwash, and
fluvial deposits overlying sedimentary and low-grade metamorphic bedrock. Glacial deposit
aquifers have been described as “irregular in distribution and highly variable both in
composition and in their ability to provide water to wells” (Brabets 1999). Both confined and
unconfined aquifers provide potable water throughout the Study Area.
A single source of regional ground water resource information for the western portion of the
Mat-Su is not currently summarized or available, although USGS is in the process of
compiling a regional hydrogeologic map of the Mat-Su. 31 Existing ground water data within
the Study Area were compiled from the Point MacKenzie, Houston, Big Lake, and the
31 Personal communication, Ted Moran, USGS, with Elizabeth Shen, November 21, 2005.
3-130 12/18/07