20061042 Ver 3_Staff Comments_20120130

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Lucas, Annette
From Lucas Annette
Sent Monday January 30 2012 10 55 AM
To Witherspoon Lauren
Cc Lucas Annette
Subject 06 01420 Ashton Hall SD — DIFFUSE FLOW CONDITION
Attachments 06 0142v3 Ashton Hall SD — DIFFUSE FLOW CONDITION docx
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The last submittal looked good I If you don t have any remaining issues please approve A diffuse flow condition is
attached
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Annette M Lucas PE
Environmental Engineer , } ,
NCDENR I DWQ I Wetlands and Stormwater J�raknt•h, r
1650 Mail Service Center Raleigh NC 27699,,1650 (M til)
512 N Salisbury St Raleigh NC 27604 ( 9" Floor (Lo( itron & P u ( (Is)
Phone [phone] Fax [phone] Email Annt itt 1 lu i� r nrcitnt col
Website http//-oortalncdenrorg/web/wg/swplws/401
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06 01420 Ashton Hall SD — DIFFUSE FLOW CONDITION
AML comments
January 30 2012
Diffuse flow plan approval The diffuse flow plan approved by this office consists of three level
spreaders and engineered vegetated filter strips and all associated stormwater conveyances the
grading and drainage patterns depicted on plan sheets dated October 20 2011 and received by the
DWQ on December 1 2011 No changes to the level spreader engineered filter strip shall be
made without written authorization from either the DWQ The diffuse flow devices shall have
maintenance access and at least a 10 foot drainage easement on each side to allow for the ability
to maintain the structures and to perform corrective actions The stormwater easements shall be
recorded to provide protection of the structures from potential alterations by future property
owners
The approved diffuse flow must be maintained in perpetuity in accordance with LS VFS
operation and maintenance (O & M) agreements signed by Mr Todd Schermerhorn on November
30 2011 The O & M agreements must transfer with the sale of the property or transfer of
ownership /responsibility for the BMP facilities DWQ must be notified promptly of every
transfer
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