CRITERIA FOR SUBSURFACE INVESTIGATION
(Updated 2/9/96)
1. The purpose of subsurface investigation is to determine the suitability of the proposed
site located in -------------------- for building a new -------------------- for the Department of
Veterans Affairs.
2. A site reconnaissance should be made by an engineering firm with geotechnical
consultants to locate any surface conditions which would indicate specific areas of
concern toward building the proposed structure.
3. Make subsurface test borings at ---------- locations indicated in the attached Boring
Location Plan.
4. All borings shall be carried to a depth of ---------- meter(s) ( ---------- ft.) or refusal. If
refusal occurs at a depth of less than ---------- meter(s) ( ---------- ft.), core rock with a
diamond core drill for a minimum 1500 mm (5 ft.).
5. Conduct "Standard Penetration Tests" and obtain samples at each change in stratum
with a maximum interval of 1500 mm (5 ft.). The Standard Penetration Test shall be
performed in accordance with ASTM-D1586.
6. Laboratory examination/verification and testing shall be made of the representative
portions of the samples to establish moisture content, density, atterberg limits, grain
size and distribution, and unconfined compressive strength as applicable to the soil
type encountered.
7. Chemical analysis shall be performed to determine if site conditions exist which might
be detrimental to buried concrete, steel, cast iron, or ductile iron, such as the presence
of sulfates or carbon dioxide.
8. Soil Report: The results of the subsurface investigation and related testing, together
with interpretations, discussions, and foundation recommendations shall be presented
in the form of a detailed soil report. The report shall include:
a) A boring location plan showing the exact location of each boring with reference to
the proposed Building No. ------------ .
b) Boring profile showing:
i) Ground elevations.
ii) Classification of soils encountered with depth.
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