HomeMy WebLinkAboutOC_RS060916 - SoilsCiOAST GEO-TECHNICAL, INC.
Mr. Crail 2 W.O. 272705-03
Response to review sheet July 14 2006
Item 2
Cooperate with civil engineer to see that your recommendations have been incorporated into
the plans.
• Acknowledged.
Item 3
Please address the San Joaquin Hills bind fault as a fault source. Amend your near source
and other values as necessary.
• This was addressed in reference 1, page 5, paragraph 1.
Item 4
Please address the effects of "LFE" on all impacted site improvements. Provide
recommendations for correction as necessary.
• Our report section in Reference 1, on page 8, titled "Lateral Lot Extension" should have
read " Lateral Fill Extension". Effects and recommendations are provided in Reference 1.
LFE is not anticipated to affect the residence due to distance from slope and rigid
foundation system.
Item 5
If foundations for top of slope walls or other foundations placed within the creep zone are
used, please provide recommendations and soil parameters for creep loading to be resisted
and passive pressure to be ignored.
• Creep loads are provided in reference 1 on page 8. Within this zone passive pressure shall
be ignored.
• Based on the provided grading plan, except for south property line site wall, site
improvements are not planned for the creep zone. Additional recommendations are not
needed.
Item 6
For the proposed pool, please see attached table for pool wall pressures recently adopted by
the Building Dept. Please amend your values as appropriate.
COAST GEOTECHNICAL
SPECIFICATIONS FOR GRADING
SITE CLEARING
All existing vegetation shall be stripped and hauled from the site.
PREPARATION
After the foundation for the fill has been cleared, plowed or scarified, it shall be disced or bladed
until it is uniform and free from large clods, brought to a proper moisture content and compacted to
not less than ninety percent of the maximum dry density in accordance with ASTM:D-1557-00
(5 layers - 25 blows per layer; 10 lb. hammer dropped 18'; 4" diameter mold).
MATERIALS
On-site materials may be used for fill, or fill materials shall consist of materials approved by the
Soils Engineer and may be obtained from the excavation of banks, borrow pits or any other
approved source. The materials used should be free of vegetable matter and other deleterious
substances and shall not contain rocks or lumps greater than eight inches in maximum dimension.
PLACING, SPREADINGAND COMPACTING FILL MATERMLS
Where natural slopes exceed five horizontal to one vertical, the exposed bedrock shall be benched
prior to placing fill.
The selected fill material shall be placed in layers which, when compacted, shall not exceed six
inches in thickness. Each layer shall be spread evenly and shall be thoroughly mixed during the
spreading to ensure uniformity of material and moisture of each layer.
Where moisture of the fill material is below the limits specified by the Soils Engineer, water shall
be added until the moisture content is as required to ensure thorough bonding and thorough
compaction.
Where moisture content of the fill material is above the limits specified by the Soils Engineer, the
fill materials shall be aerated by blading or other satisfactory methods until the moisture content is
as specified.
After each layer has been placed, mixed and spread evenly, it shall be thoroughly compacted to not
less than 90 percent of the maximum dry density in accordance with ASTM:D-1557-00 (5 layers -
25 blows per layer; 10 lbs. hammer dropped 18 inches; 4" diameter mold) or other density tests
which will attain equivalent results.
l Compaction shall be by sheepsfoot roller, multi -wheel pneumatic tire roller or other types of
acceptable rollers.
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SITE MAP
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Lot 27
Scale 1" = 40'
COAST GEOTECHNICAL
W.O. 272505 Figure 2