20080867 Ver 1_Triage Comments_20080625

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Reviewer 3
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? Send to Regions (Reviewer 2)

? More Information (Reviewer 2)
Return Application (Reviewer 2)
SATriage Forms\Triage Issue Sheet.doc
PLEASE PRINT CLEARLY
08-0867 Millstone Ridge SD
AML comments
June 25, 2008
1. Per the requirements of the Neuse Riparian Buffer Rule, diffuse flow must be
achieved at every stormwater discharge point on this property. The requirements
for diffuse flow are explained in Chapter 8 of the BMP Manual. Please submit a
site plan that shows every stormwater discharge point on the property and the
corresponding diffuse flow measure that will be used.
2. For each proposed level spreader, please provide a Level Spreader Supplement
Form with ALL required items attached. If any of the stormwater discharge
points are located such that the filter strip (from the proposed level spreader lip to
the top of bank of the receiving stream) exceeds the allowable slope (6-8 percent),
then you must provide a BMP that removes 85 percent of TSS and 30 percent of
TN and TP instead of the level spreader. For each proposed BMP, please provide
the appropriate BMP Supplement Form with ALL required items attached, or
alternatively provide evidence that Johnston County has approved an appropriate
BMP design in that location (see Item 3).
The BMP Manual and BMP Supplement Forms are available on the DWQ web
site at: http://h2o.enr.state.nc.us/su/bmp forms.htm.
3. Please provide documentation of the Johnston County's approval of the
stormwater management plan for this project by providing EITHER:
• A valid approval letter from the Johnston County indicating that the proposed
activity has an approved SMP and one copy of the approved SMP, including
plan details, calculations and other supporting information, OR
A set of stormwater plan details and calculations stamped as "Approved" by
Johnston County.