20121051 Ver 1_Staff Comments_20121212

Lucas, Annette
From:
Lucas, Annette
Sent:
Wednesday, December 12, 2012 10:56 AM
To:
Higgins, Karen
Subject:
FW: Colvin Park, DWQ Request for Additional Information -DWQ Project #12 -1051
Attachments:
12 -1051 Colvin Park - SW CONDITION.docx
Karen — Stormwater condition attached.
A
From: Debbie Edwards [mailto:dedwards @sandec.com]
Sent: Friday, December 07, 2012 4:07 PM
To: Higgins, Karen
Cc: Lucas, Annette
Subject: RE: Colvin Park, DWQ Request for Additional Information -DWQ Project #12 -1051
Thank you Karen, have a great weekend!
DEBORAH EDWARDS
Soil & Environmental Consultants, PA
919-846-5900 (office)
919-673 -8793 (mobile)
ATHINK BEFORE YOU PRINT
From: Higgins, Karen fmailto :karen.higgins&ncdenr.aov]
Sent: Friday, December 07, 2012 3:54 PM
To: Debbie Edwards; Lucas, Annette
Subject: RE: Colvin Park, DWQ Request for Additional Information -DWQ Project #12 -1051
Works for me
Karen Higgins
Supervisor, Wetlands, Buffers, Stormwater - Compliance & Permitting Unit
NCDENR - Division of Water Quality
1650 Mail Service Center, Raleigh, NC 27699 -1650
Phone: [phone]
Email:,[e-mail]
Website: http: / /Portal.ncdenr.ore /web /wa /swp /ws/webscape
E -mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
APlease consider the environment before printing this email.
From: Debbie Edwards [mailto :dedwardscabsandec.com]
Sent: Friday, December 07, 2012 2:56 ,M

To: Lucas, Annette
Cc: Higgins, Karen
Subject: RE: Colvin Park, DWQ Request for Additional Information -DWQ Project #12 -1051
Thank you Annette. Please let me know if she agrees with us.
You have a great weekend as well!
Debbie
DEBORAH EDWARDS
Soil & Environmental Consultants, PA
919 - 846-5900 (office)
919-673-8793 (mobile)
ATHINK BEFORE YOU PRINT
From: Lucas, Annette [mailto:annette.lucasCa ncdenr.govl
Sent: Friday, December 07, 2012 2:48 PM
To: Debbie Edwards
Cc: Higgins, Karen
Subject: RE: Colvin Park, DWQ Request for Additional Information -DWQ Project #12 -1051
Debbie,
I agree with your analysis of the situation. I will recommend to Karen that we issue this project with a stormwater
condition.
Have a great weekend!
Thanks,
Annette
From: Debbie Edwards [mailto:dedwardsC&sandec.coml
Sent: Thursday, December 06, 2012 4:50 PM
To: Lucas, Annette
Cc: Higgins, Karen
Subject: RE: Colvin Park, DWQ Request for Additional Information -DWQ Project #12 -1051
Annette,
It is my understanding that the Water Quality Certification 3890 requires a Stormwater Management Plan
(SMP) to reach 85% TSS, 30% TN and 30% TP removal. Wet ponds alone meet the TSS and TP removal but only
have a 25% TN removal efficiency. The purpose of these level spreaders are for pollutant removal in order to
get the additional TN removal, to meet the stormwater requirements of the Certification. That said, these
level spreaders are one component of a treatment train within the SMP that will be reviewed and Approved
by the Town of Apex.
Is this not a duplication of effort? To have you review the level spreaders for diffuse flow, and then the Town
review them to meet the 401 Stormwater Management program requirements? Not to mention, only one of
the level spreaders out of the 4 being designed is directed towards a riparian buffer, the other 3 are being
directed towards wetlands.
Thank you,

Debbie
DEBORAH EDWARDS
Soil & Environmental Consultants, PA
919- 846 -59oo (office)
919-673-8793 (mobile)
ATHINK BEFORE YOU PRINT
From: Lucas, Annette [ mailto :annette.lucasCabncdenr.govl
Sent: Thursday, December 06, 2012 3:11 PM
To: Debbie Edwards
Cc: Higgins, Karen
Subject: RE: Colvin Park, DWQ Request for Additional Information -DWQ Project #12 -1051
Debbie,
The Town of Apex has not sought delegation for their Neuse Riparian buffer program, so the DWQ has to review the
diffuse flow plan. If the DWQ is ready to approve the diffuse flow plan prior to the Town's approval of the stormwater
plan, then we will be happy to issue a conditional approval.
Please let me know if you have further questions.
Thanks,
Annette
Annette M. Lucas, PE
Environmental Engineer
NCDENR I DWQ I Wetlands and Stormwater Branch
1650 Mail Service Center, Raleigh, NC 27699 -1650 (Mail)
512 N. Salisbury St, Raleigh, NC 27604 1 9th Floor (Location & Parcels)
Phone: [phone] Fax: [phone] Email: Annette. Lucaoncdenr.eov
Website: httn: / /portal.ncdenr.org /web /wq /swn /ws /401
A Before printing this email, please consider your budget and the environment.
E -mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
From: Debbie Edwards [mailto:dedwards0sandec.coml
Sent: Thursday, December 06, 2012 9:40 AM
To: Lucas, Annette
Cc: Higgins, Karen
Subject: Colvin Park, DWQ Request for Additional Information -DWQ Project #12 -1051
Annette,
Yesterday we (S &EC) received a courtesy copy of a Request for Additional Information for the Colvin Park
project (see attached). The only items of information requested is associated with a Stormwater Management
Plan. The project is located within the Town of Apex, which is a Jurisdiction Certified for 401 Stormwater
Management Plan review. To date, the project has not received a Stormwater Management Plan Approval

from the Town of Apex however it is anticipated, in the near future. If the Avoidance and Minimization has
been met for the project, why are we holding up the 401 Approval for Stormwater questions /concerns when
the project is located within a Jurisdiction Certified for 401 Stormwater Management Plan review?
Thank you,
Debbie
DEBORAH EDWARDS
Environmental Specialist
Soil & Environmental Consultants, PA
iioio Raven Ridge Road
Raleigh, NC 27614
919-846 -5900 (office)
919-673 -8793 (mobile)
www.SandEC.com
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12 -1051 Colvin Park — SW CONDITION
AML comments
December 12, 2012
1. Stormwater Management Plan (SMP) Approval From Local Community Required
You are required to provide one copy of the approved SMP, including plan details on full -sized plan
sheets, with proof of the town of Apex's approval. The approved SMP must be submitted to the
DWQ Webscape Unit (1650 Mail Service Center, Raleigh, NC 27699 -1650) before any impacts
authorized in this certification occur. The following requirements also apply:
• The approved SMP must be constructed and operational before any permanent building or other
structure is occupied at the site.
• The approved SMP as well as drainage patterns must be maintained in perpetuity.
• The SMP may not be modified without prior written authorization from the town of Apex. A
copy of the approval letter and the modified SMP must be submitted to the DWQ Webscape Unit
prior to the commencement of the modifications.