HomeMy WebLinkAboutSDP 2021-0029; IONIS LOTS 21 AND 22; GRADING PLAN AND RETAINING WALL PLAN REVIEW; 2023-04-13Project No. 06442-32-31A
April 13, 2023
Ionis Pharmaceuticals, Inc.
2855 Gazelle Court
Carlsbad, California 92010
Attention: Mr. Wayne Sanders
Subject: GRADING PLAN AND RETAINING WALL PLAN REVIEW
IONIS PHARMACEUTICALS LOTS 21 AND 22
CARLSBAD, CALIFORNIA
References: 1. Precise Grading Plans For: Ionis Pharmaceuticals Lots 21 & 22, Carlsbad,
California, prepared by Pasco Laret Suiter & Associates (PLSA), undated (the
grading plans include: Soil Nail Wall Plans, prepared by Earth Support Systems,
undated and CMU Retaining Walls, prepared by KPFF, undated).
2. Update to Geotechnical Report and Supplemental Recommendations for Pedestrian
Bridge, Ionis Pharmaceuticals Lots 21 and 22, Carlsbad, California, prepared by
Geocon Incorporated, dated April 3, 2023 (Project no. 06442-32-31A).
3. Update Geotechnical Report, Ionis Lots 21 and 22 (Carlsbad Oaks North Business
Park), Carlsbad, California, dated October 19, 2021, prepared by Geocon
Incorporated (Project No. 06442-32-31A).
Dear Mr. Sanders:
In accordance with the request of Mr. Jacob Wittler with PLSA Engineering, we have reviewed the
referenced grading plans prepared for the subject project. The soil nail wall and CMU retaining wall
plans are part of the grading plans. The purpose of our review was to check that the grading and wall
plans have been prepared in substantial conformance with the recommendations presented in Reference
Nos. 2 and 3.
Based on our review, we opine that the grading and wall plans have been prepared in substantial
conformance with recommendations presented in the referenced geotechnical reports.
Our review was limited to geotechnical aspects of project development and did not include the review
of other details on the referenced plans. We have no opinion regarding other details found on the
referenced plans, civil, structural or otherwise, that do not directly pertain to geotechnical aspects of site
development.
GEOCON
INCORPORATED
G E OT E CHN I CAL ■E NV I RONMENTA L ■ MA T ER I A L S
6960 Flanders Drive ■ Son Diego, California 92121-297 4 ■ Telephone 858.558.6900 ■ Fax 858.558.6159
Project No. 06442-32-31A - 2 - April 13, 2023
Should you have any questions regarding this correspondence, or if we may be of further service, please
do not hesitate to contact the undersigned at your convenience.
Very truly yours,
GEOCON INCORPORATED
Emilio Alvarado
RCE 66915
EA:arm
(e-mail) Addressee
(e-mail) PLSA
Attention: Mr. Jacob Wittler