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Drains should be included at the bottom of all temporary slopes to collect surface water flow
from the slope and prevent it from flowing onto exposed building subQxades. All collected water
should be directed under control to a positive and permanent discharge system, such as a storm
sewer.
Over the long term, more permanent measures such as installation of footing and wall drains
should be included. All permanent drains should be directed to a positive and permanent
discharge point well away from the structure. Roof downspouts should not be connected to
�.r footing and wall drains, but should be tightlined separately to discharge. This will avoid the
potential for roof debris to be washed into footing and well drains and possibly blocking them.
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Cleanouts should be provided for both footing and wall drains and the downspout tightlines.
Specific site drainage details are provided in Section 4.0 of this report.
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f 3.7 UTILITIES
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..� The water table is located approximately 4 to 9 feet bgs and may be encountered during utility
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+� excavations. The utility installation contractor should expect that the water table will be
.7 encountered during excavation and should be prepared to incorporate appropriate seepage
control measures and adjust the excavation methods as appropriate for worker safety.
Utilities (gas, electrical sewer and water pipes) should be designed with flexible connections
where they pass from beneath the building structure, and should be maintained to prevent
breakage due to differential settlement. Pipes should be attached to the floor slab to reduce the
a. risk of soil settlement pulling apart the pipes at the floor slabs to subgrade interface. Because the
floor slabs will be structurally tied to pile -supported grade beams, pipes in fill beneath the slab
may settle away from the slab if the fill settles.
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H 3.8 PAVEMENTS
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Our pavement design recommendations were developed using the American Association of State
and Highway Transportation Officials (AASHTO) method for flexible pavement design. Our
recommended design pavement section includes compaction of the subgrade surface to at least
J95 Percent Compaction. Our pavement section calculations are based on the following:
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