MIRA LOMA DETENTION CENTER
GEOTECHNICAL INVESTIGATION
SCOPE OF WORK
Objective
The Geotechnical Investigation report shall contain results and recommendations
of detailed geotechnical and geological studies for building new Jail Facilities at
Mira Loma Site.
Scope of Work
The Consultant shall provide all necessary labor, equipment, and
materials, as customarily rendered when providing professional
geotechnical investigation, observation, and testing services for the
construction and repair of County capital projects.
Geotechnical Investigation
Preconstruction phase geotechnical investigation services shall consist of
all such services as are customarily rendered when providing professional
and geotechnical services, and shall include, but not be limited to, the
following:
1. Subsurface explorations to determine the nature and stratigraphy of
the subsurface soils within the facility’s footprint and obtain samples
for laboratory testing. Subsurface explorations should include a
minimum of XX borings to a depth of 50 feet. Location of the
borings shall be below or as near as possible the foot print of future
development.
2. Laboratory testing of soil samples to determine physical properties
to include:
a)
b)
c)
d)
e)
f)
g)
In-place moisture content and dry density determination
Shear strength
Expansion index
Compressibility
Gradation
Corrosivity
Sulfate Content
h) Consolidation potential
i) R-Value
3. Geologic seismic evaluation to define the geological environment
and geologic-seismic hazards that may affect the site.
4. Engineering evaluation of the geotechnical data to develop
recommendations for design of the foundations and retaining walls
below grade, floor slab support, and earthwork.
5. Seismic and dynamic analysis recommendations to include the
following:
a) Statement of known earthwork faults and geologic
seismic features in the area, soil profile type and near
source factors per 2011 LA County Building Code
requirements, and potential for liquefaction under the
structure.
b) A site-specific elastic design response spectrum based
on the geologic, tectonic, seismological, and soil
characteristics associated with the site. The spectrum
shall be developed for ground motion having a 10
percent probability of being exceeded in 50 years for
damping ratios of 2 percent, 5 percent, and 10 percent of
critical damping.
6. All data, findings, and recommendations shall be formally submitted
in a geotechnical report.
7. Support services to scoping professional and design-builder during
design and plan check.
DELIVERABLES

Geotechnical Investigation Report. (12) Hard copies and one electronic
(PDF) copy.
SCHEDULE:
Reports required within six (4-6) weeks from Notice to Proceed.
ATTACHMENTS:
1. Site Plan