HomeMy WebLinkAboutSDP 2018-0020; 540 CHESTNUT SFR; THIRD PARTY GEOTECHNICAL REVIEW (FIRST); 2020-05-02HEThELOR!1GTth%9 ENGIN EERING, INC. SOIL& FOUNDATION ENGINEERING • ENGINEERING GEOLOGY o HYDROGEOLOGY
April 2, 2020
Project No. 9096.1
Log No. 20944
City of CrIsbad
1635 Faraday Avenue
Carlsbad, California 92008-7314
Attention: Mr. David Rick
Subject: THIRD-PARTY GEOTECHNJAL REVIEW (FIRST)
Proposed Residential Development
540 Chestnut Avenue
Carlsbad, California
Project ID: 0R2020-0009
References: 1. "Grading Plans For: 540 Chestnut Avenue", by Civil Landworlcs,
dated Februaty 27, 2,020 (Sheets 1 through 5)
2. "Geotechnical investigation, Proposed Residential Development, 540
Chestnut Avenue, Carlsbad, California", by Construction Testing &
Engineering, Inc., dated Februãiy 25, 2020.
Deai Mr. Rick:
In accordance with your lequest, Hetherington Engineer ii Inc has piovided third-party
geotechnical review of the referenced report.. The following comments are provided for
analyses and/or response by the Gçbtechnicàl Consultant.
RVIEV'UF GEOTECHNICAL REPORT
1. The Consultant should review the project grading and foundation plans, provide any
additional geotechmcal recommendations considered necessary, and confirm that the
plans have been prepared in accordance with the geoteclinibal recommendations.
2 The Consultant should provide an updated geotechnical map/plot plan utilizing the
latest grading plan for the project, to clearly show (at a minimum) a) existing site
topogiaphy, b) proposed stiuctuies/impiovements, c) proposed finished grades, d)
locations of the .subsurface exploration, e) geologic contacts, and f) remedial grading
limits, etc
3. The Consultant should provide a detailed description of proposed site grading,
strucStures/improvenients, etc.
5365 Avenida Encinas, Suite A • Carlsbad, CA 92008-4369 • (760) 931-1917 • Fax (760) 931-0545 333 Third Street Suite 2 • Laguna Beach CA 926.51-2306 • (949) 715-5440 • Fax (760) 981-0545
www.hetheringtonengineOring .com
THIRD-PARTY GEOTECHNICAL REVIEW (FIRST)
Project No. 9096.1
Log No. 20944
April 2, 2020
Page 2
The Consultant should address whether the site is considered a "Near Fault Site" in
accordance with the 2019 CBC, Section 1803.5.12.
The Consultant should provide the site Risk Category and Seismic Design Category
consistent with the 2019 CBC.
The Consultant should provide a statement regarding the impact of the proposed
grading and construction on adjacent properties and improvements.
The recommended ëoefficient of friction exceeds 2019 CBCpresumptive values. The
Consultant should justify or update as necessary.
8; The Consultant should provide a minimum slab thi.cknøss for exterior hardscape.
9: The Consultant should provide a list, of recommended observation and testing during
site grading and construction.
The Opportunity to be pf service is sincerely appreciated. If you have any questions regarding
this.1eview, please contact this office at your convenience.
Sincerely,
11E1'I llRlNGT(i)N EN(.iINEERING, INC.
\cJRI NG
Paul A. 13ogse1h 0GS7
0
Professional Geologist 3772
Certified Engineering Geologi 53 -
Certified Hy~rogeologist 591
OF
Distribution: 1-via e-mail David Rick (David.Rickcarlsba,dca.gov)
1-via e-mail Cecilia Fernandez (Cecilia Fei nandez@cai lsbadca gov)
HETHERINGTON ENGINEERING, INC.
.1 p