20120387 Ver 2_More Info Requested_20130715

Lucas, Annette
From: Lucas, Annette
Sent: Monday, July 15, 2013 11:28 AM
To: 'bayerjohn @hotmail.com'; 'Lindsay Veit'
Cc: Higgins, Karen
Subject: 12- 0387v2 526 Oakland Drive
Dear John and Lindsay:
I have reviewed the bioretention cell design that you provided on Friday. There is still some information that is needed
before I can review the stormwater management plan as described below.
Please show the following information on the lot layout sheet:
a. The proposed boundaries of the drainage easement. A minimum distance of 10 feet on all sides of the
bioretention cell is required. Please note that entire drainage easement is typically on the lot which it
serves — this makes it difficult for the bioretention cell to be built directly on the lot boundary.
b. The area of the roof that will drain to the bioretention cell.
c. One -foot contour lines showing the grading for the lot and bioretention cell. These contour lines should
show the weir that will be used to bypass storms greater than one inch.
2. Please provide a specification for the bioretention cell media and the mulch that will be used. For this item and
item (3) below, you will find guidance in the BMP manual at the following link:
http: / /portal.ncdenr.org /web /wq /ws /su /bmp- ch12 /.
3. Please provide a planting plan for the tree and herbaceous plants that will be planted in the bioretention cell.
The planting plan should include the species, the size and the locations of the plants.
Feel free to contact me if you have questions. I will be in most mornings this week. I will be out on vacation next week.
Thanks,
Annette
Annette M. Lucas, PE
Environmental. Engineer
NCDENR I DWQ ( Wetlands and Stormwater Branch
1650 Mail Service Center, Raleigh, NC 27699 -1.650 (Mail)
512 N. Salisbury St, Raleigh, NC 27604 1 9th Floor (l.omition C6
Phone: [phone] Fax: [phone] Email:
Website: ht tp:_ L/ portal.ncdenr.org /web/wglswj2/ws 401
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