Page 260 - Villas at Savona Close-out Manual

Proposal for Geotechnical Field Investigation Services
Villas at Savona
2.2 Exploratory Drilling

Amec Foster Wheeler will mobilize and demobilize a field engineer or geologist, subcontracted
drill rig and drill crew, and auxiliary vehicles and equipment to and from the site. Drilling services
will be provided by a subcontracted drilling firm, who will provide a truck-mounted drill rig to access
the boring locations. Penetration of the subsurface materials will be achieved utilizing continuous-
flight hollow-stem auger. Rock is not anticipated to be encountered at the planned depths of
exploration, and is therefore not included in this proposal. If refusal by the auger drill is
encountered on gravel/cobble type deposits, cemented soils, or other obstructions, other drilling
methods not currently included in this proposal may need to be explored.

Amec Foster Wheeler plans to advance borings at three to four buildings, as specified by Heerup
on the attached site plan and amended by Amec Foster Wheeler, for a total of six (6) borings, to
depths of approximately 20 feet below existing site grades utilizing the truck-mounted drill rig.
Samples will be collected at approximate 5-foot spacing using standard penetration test (SPT)
and modified California (ring) samplers. Bulk grab samples will be collected from the borings.

Amec Foster Wheeler will lay out its program of test borings from existing surface features based
on the site plan furnished by Heerup. Upon completion of the drilling activities, the borings will be
backfilled with drill cuttings. It is assumed that the boring will not require asphalt patch. Any
excess drill cuttings from the borings will be loosely spread on the ground within 50 feet of the
boring location.

2.3 Laboratory Testing
Laboratory tests will be performed as considered necessary for engineering analysis. Tests which
may be necessary for the project include: unit weight (ASTM D2937), moisture content (ASTM
D2216), grain-size analysis (ASTM C136), plasticity index (Atterberg limits) (ASTM D4318), and
Standard Proctor (ASTM D698).

2.4 Engineering Analysis and Report
Engineering analysis of the data collected in the field and laboratory investigations will be made.
One electronic version of a geotechnical investigation report will be submitted, which will include
the following:

 Descriptions of the site and subsurface conditions including estimated depth to
groundwater.
 Logs of the test borings, a site plan showing their locations, and a description of
procedures and equipment used in the subsurface investigation program.
 Results of laboratory tests and a description of test methods.
 Depth of any collapsing soils, man-made fill or other moisture-sensitive materials that
may be present beneath the site based on SPT N values less than 10.

The basic fee quoted in Section 3.0 includes the routine minor consultation with the prime
professional and other members of the design team normally involved with this type of project
and, if required, the submission of one addendum clarifying the details of the report. Where
extensive consultation or major addenda are necessary as a result of substantial changes in the
project details, additional fees will be charged.

955 E Knox Road
Chandler, Arizona November 20, 2015 Page 2