specs

Geotechnical Investigation South River Place, Gasser Drive, Napa 29 December 2010
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the animal shelter. Once this is complete, Hartle Court (old) will be abandoned. In addition to the
road improvements through the site, there are several underground utilities along the road alignment
and also along the western property boundary.
With the exception of a stockpile noted below, the topography of the site is relatively flat to gently
sloping with localized elevation differentials as shown on Figure 4, Site Plan. It is our
understanding that the site was filled over the years since the early 1950’s with dredge materials
from the nearby Napa River. The site is currently vacant (except for the street and utility
improvements noted above) and appears to have never been developed. However, it is noted that
subsequent to our original investigation in 2002, a soil stockpile was placed on the site between the
two Hartle Courts. The stockpile materials were imported from the Imola Street Bridge
embankment material. The stockpile has recently been added to with excess materials from the
transitional housing project. The stockpile is approximately 465 feet long, 215 feet wide and up to
15 feet high as shown on Figure 4. Based on testing performed by our firm, the soil materials
consist of brown to dark brown, moderately expansive sandy clay 1 . The soil materials were
determined to be acceptable for use as general fill on the Gasser site, but not under proposed
building foundations where conventional footings are used. The materials were also determined to
be environmentally acceptable for use on the site. A smaller pile of soil and debris is located
adjacent to the ponds. Vegetation on the site consists of volunteer grasses and weeds with a few
trees around the ponds.
The above description is based on a reconnaissance of the site by a Geotechnical Engineer, on a
Scheme 17 Site Plan by LPAS Architects dated 14 October 2010 overlaid onto topographic data
from Foulk, Gomez and Associates, an aerial photo from Google Earth, and the USGS
Topographic Map of the Napa Quadrangle as obtained from the 3D TopoQuads program by
DeLorme. The Scheme 17 Site Plan and topographic data are the basis for our Site Plan included
as Figure 4 in Appendix A.
Proposed Development
Based on our review of the referenced site plan, we understand that Phase I of the South River
Place development includes a new Cinemark Theater building of approximately 41,700 square
feet, and four additional commercial office, retail or restaurant buildings noted as Retail 1, Retail
2, Pad 1 and Pad 2 ranging in size from 2,400 to 9,000 square feet. Additional improvements
will consist of constructing a plaza area, driveways, landscaping, underground utilities, concrete
flatwork, parking lots and widening of Hartle Court (new). In addition, an overflow parking lot
will be constructed north of Hartle Court (new).
1 Letter titled Import Fill Evaluation, prepared by KC Engineering Company, dated 8 March 2005.
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KC ENGINEERING COMPANY Project No. VV3200 Page 6 of 123