HomeMy WebLinkAboutCT 00-22; REDEEMER BY THE SEA LUTHERAN; INTERIM GEOTECHNICAL AS-BUILT LETTER REPORT; 2003-05-07-'.
C •0 N S U L TA N I S
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April 1, 2003/Updated May 7, 2003
Mr. Ken Voertman ', S
Redeemer by the Sea
1617 South Pacific Street .'
Oceanside, California 92054 '.
Subject: Interim Geotechnical As-Built Letter Report for Sanctuary Building Pad,
Proposed Church and Development, Redeemer by the Sea, Poinsettia Lane
and Black Rail Road, Carlsbad California CT 00-22.
References: .•
p ••,. ' - -
1 Preliminary Geotechnical Thvestigatin, Proposed Church and Residential
Development, Redeemer by the Sea, Poinsettia Lane and Black Rail Road,
Carlsbad, CA; by ' -Geopacifica Geotechnical Consultants, dated
November 20, 2000
2. Addendum Geotechnical Report, Proposed Church and Residential Development,
Redeemer by the Sea, Poinsettia Lane and Black Rail Road, Carlsbad, CA
CT 00-22, by Geopacifica Geotechnical Consultants, dated September 12, 2002
3. Grading' Plans for Redeemer-By-The-Sea, Lutheran Church of 'Carlsbad; by
Sowers and Brown Engineering, Inc.,11 sheets, project no CT 00-22, stamp date
September 26,2002 (Sheet 3)
Dear Mr. Voertman:
In conformance with the request from Roel Construction Company, we have prepared
this interim letter report addressing only the Sanctuary building pad area of the project
site (see Figure 1) A final as geotechnical compaction report for the rest and entire
project site cannot be processed until the relocation of the pre-existing on-site water lines
is completed and the earthwork along the, approximate 20 foot wide 'easement area is also
completed. We understand the City of Carlsbad is in the process Of completing necessary
plans and other procedures for the relocation of the pre-existing on-site water lines The
Sanctuary building pad area is not underlain by nor is it located immediately adjacent to
the 20 foot wide easement.
3 .0 6. 0
INDUSTRY: ST
'SUITE 105 - - S '•
- - - OCEANSIDE'
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, - CA 92054 ' ' - - •- 'S
-TEL 760.721.5488' - •- - S -
FAX: 760.721.5539 5 ' -
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1.
GE 0 LE C H N IC AL
CON S U L A N IS
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I Redeemer by the Sea '•I : April 1, 2003/Updated May 7, 2003
The subject area was completed to proposed grade as a primary cut pad. The primary
building pad is underlain directly by the Linda Vista sedimentary formation consisting of
dense, reddish brown, slightly cemented, silty sandstone. There is 'a thin wedge of fill
soils at the northeast corner of the building pad. The total thickness of the fill at the
northeast corner is estimated 'to be about 3 +1- feet. The fill consists of compacted,
reddish brown, silty sand derived from the Linda Vista Formation. The proposed building
foundations will be founded directly into the sandstone of the Linda Vista sandstone,
except for that local fill. area of the northeast corner. The planned 'building foundations
for that local limited: area should be deepened, if and as necessary, to be founded directly.
into the sandstone of the Linda Vista sandstone. The base of foundation excavations will
need to be observed to verify adequate embedment by an engineering geologist with
written geotechnical approval prior to the placement of steel and/or concrete. The lower
slab on grade at the northeast building corner should be reinforced at the cut/fill transition
in conformance with the requirements of the structural engineer.
Observation and testing of' back fill operations during construction of the Sanctuary
foundation and building will be required.
The Sanctuary building pad 'area is approved from a geotechnical perspective for the
proposed construction. This letter applies only to that area depicted on the attached
Figure 1. The structural fill soils for the project have been tested with several tests within
the fills adjacent to the eastern side of the, building. The fills observed to date are tested
structural fills. One of the tests (number 143) is -within the envelope of the Sanctuary Pad'
as shown on Figure 1. The approximate location of the test is shown on Figure. 1. The
summary of the field test data is shown on Figure 2. The summary of the maximum
density test used for evaluation of test number 143 is shown on Figure 3.
Should you have any questions, please do not hesitate to contact me.
Respectfully, ' E '
iJØ
Figure
Redeemer by the Sea
April i, 20o3 ./Updated 5-7-03
Figure 1: Sanctuary building pad area based on limits depicted by Roel Coistruction
and directly from Sheet 3 of document 3.
Drawing was modified by our staff to show location of area
only and should not be used for construction purpose.'
GEOPACIFICA
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SOIL TYPES
Soil Type Onsite Import Description
Number