SWA000209_Email_20230629

Peck, Kaitlin
From:Farkas, Jim J
Sent:Thursday, June 29, 2023 4:23 PM
To:David Odom
Cc:[e-mail]; [e-mail];
[e-mail]; Scott Roach
Subject:RE: SWA000209; 609 Union West Blvd (Union County)
David,
We reviewed the items submi?ed on 6/9/23 and there are no issues that would prevent us from issuing the Fast-Track
ATC permit for this site, however, there are some issues with the design as proposed. The Fast-Track ATC review is not
an in-depth technical review of the stormwater controls for the site, it is more of an administra?ve review of the
project/a review to see if the project has the poten?al to meet the design requirements/rules. The SCM design and
drainage area delinea?on are not required submission items at this point in the Fast-Track submi?al process so issues
with the SCM design or drainage area delinea?on do not prevent a project from ge?ng Fast-Track ATC approval, but if
the SCM design and drainage area delinea?on are provided at this point in the review, we look at them to see if the
design appears to meet the rules and MDC. Based on a precursory look at the design the following issues may arise with
the design:
 There are a number of inconsistencies in the submi?al items (for example, the permanent pool eleva?on is
listed as both 682.5’ & 683.0’ on the plans, 683.0’ on the Supplement-EZ Form, and the drawdown orifice is
shown to have an invert of 680.1’. Another example would be the BUA not adding up properly; 28,126 sf of
parking BUA + 1,379 sf of sidewalk BUA + 12,000 sf of roof BUA = 41,505 sf ≠ 45,302 sf as shown. Etc…).
 The project does not appear to meet the requirement of Runoff Treatment (15A NCAC 02H .1002(43)). In order
for a project to meet Runoff Treatment, the net increase in BUA must be captured and treated in one or more
primary SCMs. If it is not prac?cable to capture and treat all of the required BUA, the bypassed areas can be
permi?ed as a low-density area (provided that the bypass area meets the low-density requirements).
Occasionally, there are situa?ons where it is not prac?cable to capture all of the required BUA in an SCM and it
is not possible to permit the bypass areas as a low-density area, however these situa?ons require a
variance/waiver which is not allowed for projects permi?ed through the Fast-Track program (per 15A NCAC
02H .1043(1)(a)).
 Wet Pond MDCs 1 & 2 – The main pool is separate from and does not include the forebay. Please ensure that
the forebay is not included the determina?on of these MDC. NOTE: Per the provided stage storage table, the
cumula?ve storage volume at the permanent pool surface eleva?on is 8,593.5 cf whereas it is shown in the
Supplement-EZ Form as 10,681 cf. NOTE: The sediment storage zone does not contribute to the volume of either
the main pool or the forebay. NOTE: It is recommended to include a stage storage table for the permanent main
pool, the permanent forebay, and the temporary storage so that the MDC may be evaluated.
 Wet Pond MDC 5a – Per the Supplement-EZ Form, the forebay volume is shown as 1,602 cf and the main pool
volume is shown as 10,681 cf (1,602 cf / 10,681 cf = 14.99% < 15%, please also refer to the note above with
regard to excluding the forebay from the main pool).
 Wet Pond MDC 6 – The loca?on and slope of the vegetated shelf are unclear. The cross-sec?onal view of the
pond indicates 10’ wide and 10:1 slopes whereas the grading plan shows 6’ wide and a flat slope (contours for
the top and bo?om are both shown to be 683).
 Wet Pond MDC 7 & General MDC 1 – As men?oned earlier, the drawdown orifice appears to have an invert
below that of the permanent pool surface eleva?on. There is also a bypass weir with an invert eleva?on of
681.81’ which is below the permanent pool. NOTE: The invert of the bypass device (in this case, weir) sets the
eleva?on of the temporary pool and the temporary pool must store at least the minimum required treatment
volume.
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 Wet Pond MDC 11 – You will need to provide a plan?ng plan for the SCM.
 General MDCs 8 & 9 – Please note that you will need to include a maintenance access & easement for the SCM.
Please let me know by close of business 7/7/23 if you would like to modify the design (and have me look it over again for
apparent issues with the design) prior to us issuing the Fast-Track ATC or if you would just like us to issue the ATC (and
fix the design some?me between now and Final Approval). NOTE: The project will need to comply with the
rules/regula?ons before the Final Approval (part 2 of the Fast-Track permi?ng process) is issued for the site and before
the E&SC permit is closed out.

Jim Farkas
State Stormwater Engineer
North Carolina Department of Environmental Quality
Office: [phone]
[e-mail]

From: Peck, Kaitlin <[e-mail]>
Sent: Tuesday, June 13, 2023 8:58 AM
To: [e-mail]; [e-mail]; [e-mail]; David Odom
<[e-mail]>; Scott Roach <[e-mail]>
Cc: Farkas, Jim J <[e-mail]>; Eplin, Jerry W <[e-mail]>
Subject: SWA000209; 609 Union West Blvd (Union County)

Good Morning,

We received your post-construc?on stormwater Authoriza?on to Construc?on (ATC) permit applica?on for the subject
project on 6/9/2023. Reviews under the Fast Track permi?ng process can take up to 30 calendar days to complete. You
can see where this project stands in the review queue by emailing Jim Farkas (He has an autoreply set up that has the
review queue on it). Please upload all documents that you mailed into our office through the link provided below. Be
sure to choose the Central Office as the Primary Contact office.

h?ps://edocs.deq.nc.gov/Forms/SW-Supplemental-Upload

IMPORTANT NOTE: Please ensure that each file is uploaded under its appropriate file type. Addi?onal file types can be
entered into the electronic form by clicking on the “Add Another Post-Construc?on File Upload” link directly below the
“State Stormwater Informa?on Uploads” sec?on of the form. YOU MUST CLICK ON THE “ADD ANOTHER POST-
CONSTRUCTION FILE UPLOAD” TO ADD ADDITIONAL FILE TYPES TO THE SUBMISSION. Merely changing the file type
dropdown as you upload the various files (without adding addi?onal file uploads) will upload all of the files as the last
file type selected, the submission will get flagged during review, and you will need to resubmit the files. Please do not
upload en?re plan sets through this form, but rather upload the relevant individual sheets under the appropriate file
type. Selec?ng the correct file type ensures that the files are properly named in the electronic repository and it helps
expedite the review process. NOTE: We do not require and we discourage the upload/submission of extraneous plan
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sheets (such as ligh?ng plans, u?lity plans, striping plans, sight distance plans, etc…) as these files are not needed for
review.

Please type in permit #: SWA000209

This project will be reviewed by Jim Farkas, if you have any ques?ons, please contact them at [e-mail] or
at 919-707-3646.

Thank you,

Kaitlin Peck
Environmental Specialist
North Carolina Department of Environmental Quality
Office: [phone]
[e-mail]

Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
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