HomeMy WebLinkAboutCDP 2016-0004; 148 TAMARACK AVENUE; RESPONSE TO THIRD PARTY SECOND REVIEW DATED JUNE 19,2019; 2019-06-21. , .. \ . ~
June 21, 2019
1941-A Friendship Drive
El Cajon, CA 9 2020
ff/, (M'J) 158-WJnO
FAX(619) 258-9004
RECE'WED
JUN 2 4 2019 Mr. Jeff Parshalle
jeff@jparch.net LAND DEVELOPMENT
Subject: Response to Third-Party Geotechnical Review (Second ~J~.ffiJ~~
2019 for the Subject Property located at 148 Tamarack, Carlsbad, CA 92008
Dear Mr. Parshalle:
In accordance with your request, we have provided this Second Addendum Geotechnical
letter in response to the City Carlsbad, Third-Party Geotechnical Review (Second Review) dated
June 19, 2019 by Herrington Engineering, Inc for the Subject Property located at 148 Tamarack,
Carlsbad, CA 92008
The following are our responses to the Third-Party Geotechnical Review (Second Review):
Issue #1
1. The Consultant should review the project foundation plans, provide any additional
geotechnical recommendations considered necessary, and confirm that the plans have
been prepared in accordance with the geotechnical recommendations provided in the
referenced repmts.
We have reviewed the structural and foundation plans prepared by Mike Suprenant and
Associates dated August 11, 2017 (revised 6/4/19) for the new single family residence with
detached garage for the aforementioned address. Specifically, we have reviewed sheets S-1, S-2,
S-3, SD-1 and SD-6 of the structural plans.
We certify that the plans have been prepared in accordance with the geotechnical
recommendations provided in the referenced report for the subject property 148 Tamarack,
Carlsbad, CA 92008.
Issue #2
2. The existing site topography and existing improvements
"Geologic/Geotechnical Map ... " provided in Reforence 5.
provide a legible copy of the "Geologic/Geotechnical Map ... ".
are not legible on the
The Consultant should
See attached Geologic/Geotechnical Map for the Subject Property Located at 148 Tamarack,
Carlsbad, CA 92008 -A legible copy of the geologic/geotechnical map has been incorporated as
part of this response letter.
148 Tamarack Ave-Third Party Geology review (2nd review)
JLVG/BJL 6/21/2019 Page 1 of2
. "
Issue #3
3. The Consultant should provide a complete I ist of recommended observation and testing
during site grading and construction.
The following list of observation and testing is recommended to be performed during grading
and construction of the project:
• Pre-grading inspection and pre-grading meeting with grading contractor to check that
grading limits conform to those specified in the project plans.
• Inspection of bottom of excavation key for the remedial removal and recompaction of the
proposed building pads.
• Continuous observation of site soil conditions to check that the subsurface conditions and
soil properties conform to those specified in the approved geotechnical reports.
• Continuous observation of engineered fill placement and compaction per Section IV of
the General Earthwork and Grading Guidelines listed on the approved geotechnical
report. Field density testing for compaction of the engineered fill shall be performed in
accordance with ASTM D1556 or ASTM D6938 methods.
• Inspection of bottom of footings trenches to be satisfactory to achieve the design bearing
capacity.
We appreciate this opportunity to be of service. Should you have any questions, please call our
office at (619) 258-9000.
Sincerely,
ernard J. Luther, RCE 63653, CEG 1356
CEO
C 63653
I
\:!1c~1~r-~~ •, :.--
148 Tamarack Ave -Third Party Geology review (2nd review)
JLVG/BJL 6/21/2019 Page 2 of2
4• PVC OU71.ET 7HRU WALL
TO CONCRETE DRIV£WA Y (.'.) /!:If.:~ /!:If.:~ 1!:I ... ~ ~~~ ~~~ r ....._, "' "' "' "' "' "' EXISTING
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ARCHITEcrs BUILDING PLAN~
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EXISTING OV£RHEA1~-~•--c,,. X: 7 B-2 TO 36•
;BELOW GROUND
,:SURFACE
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BELOW GROUND ,,') ELECTRIC LINE -
PROTECT IN PLACE
UNTIL REMOVED ,
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OU71.ET 4 • PVC PIPE
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-APPLIED
CON§Y!J~
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:u.:>U ~~~ ®t~ f C I a t.~ 11 ~ L r J, ,.,r H , I 1JJ'~
MAIN BUILDl/'fG
(4" CONC./4" AB)
54.80 FF
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NJ4'JOVl"W 116.71' A...,.] EXISTING GAS UN[. _J 12+55 It ,.,,~'&! LCOBBLESTONE PROTECT IN PLACE 12+53 -EXIST WATER
i:::: L<J ~ SH IN -CONGRE-Tf--UNn D 'O R/W I.I TER ~ co ~ '----EXISTING A · LEGEND:
f;:j ~ ~ BUILDING REFERENCE: This map was ~~ 1 Qop6-7 -OLD PARALIC
prepared from an existing STAT/ DEPOSITS, UNITS 6-7
Grading plan by bHa, Inc. and ~~; r --1 PROPERTY LINE
from the field investigation LANDS, ---•
performed by APPLIED
CONSULT ANTS.
FIFURE A: GEOLOGIC/ GEOTECHNICAL MAP
148 TAMARACK AVE,
CARLSBAD, CALIFORNIA 92008
.----. ·----· LIMITS OF REMEDIAL
GRADING
Date : 6/3/19
Drawn by: J L VG
...