20010586 Ver 2_Staff Comments_20130410

Lucas, Annette
From: Lucas, Annette
Sent: Wednesday, April 10, 2013 1:47 PM
To: Smith, Cherri L
Subject: 01- 0586v2 Bass Lake Greenway Phase II
Attachments: 01- 0586v2 Bass Lake Greenway Phase ll.docx
Cherri,
Diffuse flow condition for the approval letter attached.
A
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 9u' Floor (Location & Parcels)
Phone: [phone] Fax: [phone] Email: Annette. LucasC@,ncdenr.gov
,ncdenr.gov
Website: httn: / /portal.ncdenr.org /web /MM /swu /ws/401
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01 -0586v2 Bass Lake Greenway Phase II
AML comments
April 10, 2013
1. Diffuse Flow Approval by the DWQ for Greenways
All stormwater shall be directed and maintained as diffuse flow at non - erosive velocities through the
protected stream buffers such that it will not re- concentrate before discharging into a stream. If this
is not possible, it may be necessary to provide an engineered level spreader or stormwater facilities
to remove nitrogen and phosphorus priori to discharge. If deemed necessary, these facilities will
require additional approval from the Division of Water Quality.