HomeMy WebLinkAboutSDP 16-13; OAK VETERANS HOUSING; BIOFILTRATION BASINS BMP CERTIFICATION; 2022-06-13
June 13, 2022
Subject: Permanent BMP As-built Verification
Oak Veterans Housing Project
Drawing No. 523-5A
Summary:
This project includes the construction of six biolfiltration basins designed in
accordance with the City of Carlsbad BMP Design Manual. As shown on sheets 3 and
4 of the approved grading plans, Drawing No. 523-5A, the required treatment areas
are:
BMP 1 100 SF
BMP 2 32 SF
BMP 3 61 SF
BMP 4 109 SF
BMP 5 46 SF
BMP 6 52 SF
Details for the biofiltration basin are shown on sheet 4 of the grading plans. Additional
information can be found in the project’s approved Storm Water Quality Management
Plan (SWQMP) prepared by Chang Consultants, dated 6-5-2020.
Site Visits:
Onsite reviews of the construction of the basins occurred on the following dates;
1/18/22
4/20/22
The purpose of the site visits was to document the construction of the basins and to
ensure compliance with the approved grading plans and SWQMP.
Additional Observations:
The basins were constructed in substantial conformance with the plans. The depths
of the aggregate and engineered fill placed in the basin is consistent with what is
required per the approved plans. The ponding and freeboard depths are also
consistent with the approved plans. Slight modifications were made in the field to
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
the shapes of the basins due to conflicts with the building footings. In all cases the
minimum treatment area provided is as shown in the BMP Treatment Area Table on
sheet 4 of the approved grading plans.
Additional Information:
1. The impermeable liner was installed over the entire bottom and sides of the
basin as per plan.
2. Landscaping appears to be consistent with landscape plans in the approved
grading permit plan set. The amount of pervious and impervious areas within
the project limits is consistent with the approved plans. See the attached letter
from form/work Landscape Architecture.
3. The contractor provided written confirmation that they constructed the
basins in substantial conformance to the plans. See the attached letter from HA
Builder.
Conclusion:
Based on the above information, KLE believes all BMPs have been constructed in
substantial conformance with the project’s approved grading plans, SWQMP, and the
City’s BMP Design Manual.
Lisa Leweck, PE
Principal
Attachments
-Construction substantial conformance letter from form/work landscape
Architecture
-Construction substantial conformance letter from HA Builder
-Construction photos by Kettler Leweck (4/20/22)
-Construction photos by Contractor (1/11/22)
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
memo
DATE: April 18, 2022
TO: Jacob Wittler
Kettler Lewick Engineering
1620 5th Ave., Ste. 675
San Diego, CA 92101
FROM: Michael Vail
PROJECT: Oak Veterans - Carlsbad
Jacob,
As the Landscape Architect of Record for the Oak Veterans project in Carlsbad, I have
observed in the field that the planting in the stormwater treatment areas has been
installed in conformance with the approved landscape plans.
The amount of pervious and impervious areas also appear consistent with the approved
plans.
Please feel free to reach out if there are any questions.
Regards,
Michael Vail, ASLA
mike@formwork-la.com
LANDSCAPE ARCHITECTURE t
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING
'
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING ____ _,,
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENG I NEERING
~ ,;;_:ru1y1 JJJJJJf!A
• I
j
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING
. f r$ y
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING ~; 1" ·1 ~·
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com
KETTLER♦ LEWECK
ENGINEERING
1620 Fifth Avenue, Suite675 I San Diego.CA 92101
Tel: 619 269-3444 I Fax: 619 269-3459 I www.kettlerleweck.com