SW6210204_As-Built - Certification_20231106

State Stormwater Management
Permit No. SW6210204
AS-BUILT DESIGNER'S CERTIFICATION FOR CONTECH STORMFILTER PROJECT
I hereby state that I am a licensed professional and I certify by my signature and seal below, that
have observed the construction of the project named above to the best of my abilities with all due care
and diligence, and that the project meets the requirements of NCAC 02H.1050(15), has been
approved by the Division under the New Stormwater Technology MDC, meets the recommended
MDC listed in Chapter D-1 of the Stormwater Design Manual, and has been constructed in
accordance with the permit documents, plans and specifications on file with and provided to the
Division, except as noted on the "AS-BUILT" drawings, such that the intent of the stormwater rules
and the general statutes has been preserved.
Check here if this is a partial certification. Section/phase/SCM #? 1 _
_ Check here if this is part of a Fast-Track As-Built Package Submittal per .1044(3).
Check here if the Designer did not observe the construction, but is certifying the project.
Check here if pictures of the SCM are provided.
Printed
Name Frank Slinsky Signature (ThTh l�
NC Registration Number 0 3 3 6 1 2_ Date 1 ° / / / Z o Z 3
Consultant's Mailing Address:
SEAL:
\\\ky, CARpf`,'`/ 5410 Trinity Road, Suite 102
gpQpF�SS�p�L? � City/State/ZIP Raleigh/NC/27607
••a SEA 9f
_ • 0336 1 2 Phone Number 919-866-4505
= "(N. �4'• �. � Consultant's Email address:
),• GIN�
i74i�/,4/F1$s t'o v [e-mail]
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O Circle N if the as-built value differs from the Plan/permit. If N is circled, provide an explanation on
page 2
ON/E = not evaluated (provide explanation on page 2) ON/A = not applicable to this project or SCM.
This Certification must be completed in conjunction with the General MDC certification under NCAC
02H.1050
Consultant's Certification MDC .1050(15) OAs-built OO N/E OO N/A
A. Inlets/ Pretreatment
1. Inlets are located per the approved plans. 0or N
2. A minimum 4' diameter by 2' deep sump is provided. Y or N N/A
B. Volume / Elevations/ Construction
1. The provided width, length and height of the detention area,
including the piped storage, are consistent with the approved YOor N
plan.
2. The bottom elevation of the detention area is consistent with OY or N
the approved plans.
3. The bypass elevation is consistent with the approved plan. Tor N
4. The overflow elevation is consistent with the approved plan. Y for N
5. The volume of water stored in the detention area is at least OY or N
0.75 times the treatment volume.
C. Storm Filter Media and System
1. The as-built system meets the manufacturers specifications. (br N
2. The number of cartridges provided is consistent with the Cbr N
approved plans.
3. The Perlite Media has been used. c)br N
4. In Nutrient Sensitive Waters (NSW) and for nutrient removal Y or N N/A
credit, the Phosphosorb Media has been used.
5. The StormFilter Media has a flow rate of 1 GPM/ft` of media �r N
surface.
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State Stormwater Management
Permit No. SW6210204
Provide an explanation for every MDC that was not met, or for every deviation from the permitted condition
below:
A2 - A sump (optional) was not designed as part of the Contech SCM design.
C4 - Site is not in NSW.
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