20140721 Ver 1_Emails_20140812

Larsen, Cory
From: Booze, Lisa [Lisa. Booze @raleighnc.gov]
Sent: Tuesday, August 12, 2014 12:48 PM
To: Larsen, Cory
Cc: Smith, Cherri L
Subject: RE: Vue 64 @ 2520 Ratchford Drive
Attachments: GH -13 -13 Approval Letter + AA.pdf; Vue64NitrogenCalcs.pdf; Vue64NitrogenExhibit.pdf;
DFIRM_NC_3720171500J[1].pdf; Vue64FEMAStudy.pdf; ATT00001.c; ATT00002.htm
Cory,
Please see attached exhibits:
• Administrative Approval (AA) granted for Preliminary Site Plan (GH- 13 -13) identifying City's acknowledgement of
exemption from runoff control requirements under Code Section 10- 9023(b)(4).
• Nitrogen calculations and exhibit map demonstrating compliance with nitrogen loading calculations and
mitigations. The site is providing a level spreader - vegetated filterstrip per Chapter 8 of the DWQ BMP design
manual to remove 30% TN and 30% TP, and is utilizing an existing channel originating outside the buffer for
bypass conveyance down through the buffer into the stream. No proposed buffer disturbance is proposed in
association with the stormwater devices.
• FEMA flood map and City- approved, FEMA flood study indicating summary of discharges into Crabtree Creek at
this location (Approximately 1350 ft upstream of Hwy US 1). This site discharges into an unnamed tributary that
has detailed floodplain delineated as a backwater effect of Crabtree Creek. The total drainage area's discharges
into Crabtree Creek (10% = 10,050+ cfs) far exceed the discharge from this one site, and therefore, detaining on
site would not benefit any downstream properties.
Let me know if you have any additional questions.
Lisa
Lisa S. Booze, CFM
Sr. Stormwater Engineer
City of Raleigh
(919) 996 -3518
From: Larsen, Cory [mailto:cory.larsen @ncdenr.gov]
Sent: Friday, August 08, 2014 2:10 PM
To: Booze, Lisa
Cc: Smith, Cherri L
Subject: Vue 64 @ 2520 Ratchford Drive
Lisa,
Please send me electronic copies of the following information for this project:
City's approval letter regarding exemption from stormwater control requirements;
Applicant's calculations demonstrating Nitrogen export loading < 10 Ib /ac -yr and applicable offset payments to
meet 3.6 Ib /ac -yr;
The City- approved engineering study in support of the exemption.
Thanks.

Cory Larsen, PE
Environmental Engineer II
NCDENR I DWR I Raleigh Regional Office
3800 Barrett Drive, Raleigh, NC 27609
T: (919) 791 -4200
Note: 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.