HomeMy WebLinkAboutSDP 2017-0002; PACIFIC VISTA COMMERCE CENTER; BMP CERTIFICATION - STORMWATER BASIN; 2019-08-21
February 4, 2019
Mr. Aaron Parker, P.E.
SB&O INC.
3990 Ruffin Road, Suite 120
San Diego, CA 92123
Statement of Substantial Compliance for Bioretention Basin Landscaping
Owner: Ryan Companies US, Inc.
Project: Pacific Vista Commerce Center, DWG #505-4L
Address: Carlsbad Oaks Lot 23, Carlsbad, California
I hereby declare, as the project Landscape Architect, that the landscape planting and irrigation within the bio-
retention basins for the above referenced project have been installed in substantial compliance with the City
approved plans and specifications and that I or my agent have performed the necessary inspections in order to
confirm substantial compliance.
Sincerely,
Ridge Landscape Architects
Jim Ridge
RLA License #2809
California Registration No.
2/4/19
8841 RESEARCH DRIVE SUITE 200
IRVINE CALIFORN IA 92618
949.387.1323 OFF CE
RIDGELA.COM
Project No. 06442-32-28B February 8, 2019 Ryan Companies 4275 Executive Square, Suite 370 La Jolla, California 92037 Attention: Mr. Ryan Soukup Subject: BIORETENTION BASIN AS-GRADED SOIL CONDITIONS PACIFIC VISTA COMMERCE CENTER (CARLSBAD OAKS NORTH BUSINESS PARK – LOT 23) CARLSBAD, CALIFORNIA Reference: Final Report of Testing and Observation Services Performed During Fine Grading and MSE Wall Construction, Carlsbad Oaks North Business Park – Lot 23, Pacific Vista Commerce Center, Carlsbad, California, prepared by Geocon Incorporated, dated November 9, 2018. Dear Mr. Soukup: In accordance with your request, we have prepared this letter to document the as-graded soil conditions beneath the bioretention basins at the subject site. During grading, Geocon Incorporated observed and tested the compacted fill placed at the subject site, including the bioretention basin areas. The compacted fill was placed at a minimum relative compaction of 90 percent (see Reference). During improvement construction, liners and subdrains were installed within the basins. At the direction of the City of Carlsbad, soil placed to bury the liner was compacted to at least 95 percent of the applicable maximum dry density at an appropriate moisture content. The test results will be provided in the forthcoming final improvement report. It is our opinion that the soil observed and tested in the bioretention basins was properly compacted and ready to receive the planned improvements. Should you have questions regarding this letter, or if we may be of further service, please contact the undersigned at your convenience. Very truly yours, GEOCON INCORPORATED Trevor E. Myers RCE 63773
TEM:dmc
(e-mail) Addressee
GEOCON
INCORPORATED
GEOTECHNICAL ■ ENVIRONMENTAL ■ MATE RI ALS O
6960 Flanders Drive ■ San Diego, California 92121-297 4 ■ Telephone 858.558.6900 ■ Fax 858.558.6159
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