SW8140906_As-Built - Certification_20240220

Post-Construction Stormwater Management
Permit No. SW8 140906
AS-BUILT DESIGNER'S CERTIFICATION FOR FILTERRA PROJECT
I hereby state that I am a licensed professional and I certify by my signature and seal below, that I
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-3 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 #? Filterra A
_ 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 �'•'A !t S//ii .5427 Signature /4
NC Registration Number v 3 3 6/ Date Z/5/2- O Z(,
Consultant's Mailing Address:
SEAL: \\ C�,,i�
\` "c� . .' ' 5410 Trinity Road Suite 102
• �FESsiO.ma Cit /State/ZIPRaIei h/NC/27607
�- 2'.9 : Y 9
• a SEAL �• =
033612 _
�,�,•, F Phone Number919-866-4505
lfrG
143, �SLINs :\*•'\ Consultant's Email address
i: [e-mail]
O Circle N if the as-built value differs from the Plan/permit. If N is circled, provide an explanation on
page 2
OO N/E = not evaluated (provide explanation on page 2) 3N/A = not applicable to this project or SCM
This Certification must be completed in conjunction with the General MDC certification under NCAC
02H.1050
Ca D ion MDC .1050(15) ®As-built I ®N/E CDN/A
A. Sizing/Pending Depth/tlnde T —!
1. The Filterra system has been sized based on providing
treatment of the design water quality volume in North Y k r N
Carolina.
2. The ponding depth of the design water quality volume is 9 YQor N
inches above the media layer
3. A 4-inch underdrain has been provided for Filterra units up to Y or N N/A
48 square inches in media surface area. 1
4. A 6-inch underdrain has provided for Filterra units over 48 Obr N
square inches in media surface area.
B. Media I Mulch Depth/Plating
1. The Standard Filterra Media depth is 21 inches. r N
2. The Filterra mulch depth is 3 inches. Y r N
3. The planting has been installed as provided by Contech QY or N
Engineered Solutions. _
C. Configurations/Activation L—
1. The Filterra system has been constructed in an offline Y or N N/A
configuration.
2. The Filterra system has not been constructed in an offline
configuration but contains internal bypass mechanisms OY or N
provided by Contech Engineered Solutions.
3. The Filterra system has been activated by Contech YOor N
Engineered Solutions.
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Post-Construction Stormwater Management
Permit No. SW8 140906
Provide an explanation for every MDC that was not met, or for every deviation from the permitted condition
below:
A.3. - N/A, underdrain is 6"
C.1. - N/A, Filterra not constructed in an offline configuration
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