20111062 Ver 2_Staff Comments_20130304

Lucas, Annette
From: Lucas, Annette
Sent: Monday, March 04, 2013 2:40 PM
To: Smith, Cherri L
Subject: 11- 1062v2 Villagio @ La Scala Apartments - SW and Diffuse flow condition
Attachments: 11 -1062 Villagio at La Scala Apartments — SW AND DIFFUSE FLOW CONDITION.docx
Cherri,
In the previous approval letter, we asked them to provide the approved SW plan from the Town of Wake Forest and a
diffuse flow plan for me to review /approve. They didn't provide either. SO, I think we should issue with the same
conditions as before (see attached). Let me know if you have questions.
I love this new way of organizing our work! I'm glad you are here to have thought of this brilliant idea.
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. Lucas(@ncdenr.gov
Website: httn:/ /Dortal.ncdenr.org/web /wg/swt)/ws /401
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11 -1062 Villagio at La Scala Apartments — SW AND DIFFUSE FLOW CONDITION
AML comments
March 13, 2012
1. Stormwater Management Plan (SMP) Approval 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 Wake Forest'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 Wake
Forest. 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.
2. Diffuse Flow Plan Approval Required
A final, written diffuse flow plan for this project, including Level Spreader - Vegetated Filter Strip
(LS -VFS) Supplement Form for each proposed LS -VFS and all required items at the scales specified
in the Required Items Checklist, shall be submitted to the DWQ Webscape Unit for review and
approval. Diffuse flow must be addressed at every outfall where a stormwater BMP will not provide
at least 30% removal of total nitrogen and total phosphorus. The diffuse flow plan must be designed
in accordance with the version of the 401 Stormwater Requirements on the place of the date of the
submittal and must be approved by the DWQ before any impacts may occur. Before any future
permanent building, the diffuse flow plan as approved by the DWQ must constructed and operational.