20120077 Ver 1_Staff Comments_20120518

Strickland, Bev
From: Lucas, Annette
Sent: Friday, May 18, 2012 10:43 AM
To: Randy King
Cc: Mcmillan, Ian; Witherspoon, Lauren; Higgins, Karen; Strickland, Bev
Subject: 12 -0077 Del Webb Active Retirement Community
Good to talk to you today. As we discussed, we'll issue you a 401 that is conditional — saying you can commence each
phase after the DWQ has received the approved SW plan from the City of Durham (including the level spreader plans).
Then for the future portions of the site, please provide a conceptual stormwater management plan for the project that
includes the following:
a. A depiction of the drainage areas on the site.
b. An estimation of the percentage imperviousness associated with each of the drainage areas.
c. A calculation of the water quality volume associated with each drainage area.
d. A depiction of a proposed BMP (state the type of BMP you plan to use) on the site plan that is correctly
sized based on the water quality volume.
Let me know if you have any 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 Stn Floor (Location 8'z, P a.a cels)
Phone: [phone] Fax: [phone] Email: lniiette,Lua a,sa Ia ala.rm�cav
Website= http: / /portal.ncdenr.org /web /wq /swp /ws /401
�.A Before priritili; this email, please consider your budget and the enviroruiient.
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