20081287 Ver 1_Staff Comments_20080929

DWQ#: Date: Who Reviewed:
Plan Detail Incomplete
? Please provide a location/most recent bound and published county soil survey/IJSGS 1:24,000 topographic Map for the project.
? Please re-submit your site plans on full plan sheets at a scale of no smaller than 1 "=50' with topographic contours shown.
? Please provide cross section details showing the provisions for aquatic life passage.
? Please provide building envelopes for all lots with wetlands, streams or buffers (or lots ) on the site plans.
? Please indicate proposed lot layout as an overlay on the site plan.
? Please provide a signed and sealed geotechnical report of subsurface soils at the proposed bottomless culvert location. The
report must comply with the Division of Highways - Guidelines for Drainage Studies and Hydraulic Design, prepared by A.L.
Hankins, Jr., State Hydraulics Engineer - 1999.
? Please locate any planned sewer lines on the site plan.
? Please provide a detailed planting plan for (standard format includes: scientific name, common name,
source of the plant material, plant spacing, wetland indicator status, etc., as well as planting specifications).
? Please indicate all proposed stream or wetland driveway crossings on your plan sheet (including future proposed).
? Please indicate all stream impacts including all fill slopes, dissipaters, and bank stabilization on the site plan.
? Please indicate all wetland impacts including fill slopes on the site plan.
? Please enumerate all riparian buffer impacts on the site plan and clearly label impacts (Buffer Impact 1, etc.).
? Please locate all isolated or non-isolated wetlands, streams, and other waters of the State as overlays on the site plan.
? Please locate all of the protected riparian buffers as overlays on the site plan, clearly showing Zone 1 and Zone 2.
Avoidance and Minimization
? The labeled as on the plans does not appear to be necessary. Please eliminate the
or provide additional information as to why it is necessary for this project.
? This Office believes that the labeled on the plans as can be moved or reconfigured to
avoid the impacts to the . Please revise the plans to avoid the impacts.
? This Office believes that the labeled on the plans as can be moved or reconfigured
to minimize the impacts to the . Please revise the plans to minimize the impacts.
? Your proposed stream crossing appears to be aligned at approximately . Please re-configure your proposed stream
crossing to show it aligned approximately perpendicular (between 75° and 105°).
Diffuse Flow and Stormwater
? Per the requirements of the Riparian Buffer Rule, you must show that this site meets diffuse flow requirements
with a level spreader or other BMP per Chapter 8 of the BMP Manual (see hdp:-,1,2o.enrstate.nc_usistibn,p fon„s.htm).
? Please submit a Level Spreader Supplement Form with all required items for each proposed level spreader (see
http h2o.vnr.,tate nc.u5 ,u lnnp_f rm .htm).
? Please show contour lines down slope of the level spreader to show that it has been correctly sited per the BMP Manual.
? The slope from the proposed level spreader(s) lip ( ) to the top of bank of the stream exceeds the allowable
slope for level spreaders (6% for wooded vegetation and 8% for thick ground cover and grass). You must either relocate the
level spreader(s) to a location where the filter strip slope(s) is/are appropriate or provide a BMP that removes 85 percent TSS
and 30 percent TN and TP. For each proposed BMP, provide a completed BMP Supplement Form with all the required items
(see htrov-h2o.e„rstate. tic. usiswbmp f'omti .htm).
? Please provide calculations to show the outlet velocity from outlet(s) to the wetland(s). A non-erosive
velocity of two feet per second or less must be achieved for the peak flow from the 10-year storm.
? [High Density] Per the requirements of GC , this project is subject to Stormwater Management Plan (SMP) Requirements
for Applicants Other Than the North Carolina Department of Transportation (see hln,:, DLO.enr.state.ne.?,,;nc,?eaa„as%>. For each proposed
BMP, please provide a completed BMP Supplement Form with all required items (see htm %hzo.e„r.state.nc.,,sis,ubmp fom,s.hm,).
? [Pockets of High Density] Please provide an inventory of imperviousness surfaces in each drainage area. The inventory should
include all proposed building footprints, roads, driveways, sidewalks, gravel-surfaced areas, amenity areas, etc. A Stormwater
Management Plan (SMP) must be provided for any drainage areas that exceed 24 percent imperviousness. For each BMP,
provide a completed BMP Supplement Form with all the required items (see hup:, l,z{,.enrsc,tc.ne.u? sevb,,,p forms .11[m). Per NCAC 213
15A: 02H.1000, a "drainage area" is defined as "the entire area contributing surface runoff to a single point."
? Please provide a BMP Supplement Form with all required items for every BMP on the site (see http:iinzo.enr.statc.nc_ns?swb,nn forms htm).
? Please use the most current version of the BMP Supplement Form (see: hip:: hzo.e„rstate.nc.ns?s,ny,, n tonns.hhn).
? Please complete all items in Part I of the BMP Supplement form: Project Information and Design Summary.
? [For certified local governments only - see 401 unit website] Please provide documentation of the local government's
approval of the stormwater management plan (SMP) for this project by providing EITHER:
• A valid approval letter and one copy of the approved SMP (including plans and calculations), OR
• One set of stormwater plan details and calculations stamped as "Approved" by the local government.
Mitigation
? of compensatory mitigation is required for this project. Please provide a compensatory
mitigation plan. The plan must conform to the requirements of 15A NCAC 2H .0500 and must be appropriate to the type of
impacts proposed.
? Buffer mitigation is required for all road crossings that impact 150 linear feet of riparian buffer or more. Please submit a
mitigation plan detailing the amount of buffer impact at crossing and how the impact will be mitigated.
? Please provide documentation from the NCEEP indicating their willingness to accept your request to purchase
(type of mitigation) credit to mitigate for the proposed
mitigation) impacts listed in your PCN application per section VIII, No. 2.
(type of
Other
? The application fee is insufficient because over 150 feet of stream and/or over 1 acre of wetland impacts were requested. Please
provide $ . This additional fee must be received before your application can be reviewed.
? Please complete Section(s) on the application.
? Please provide a signed copy of the application.
? Please provide an agent authorization letter for the application signature.
? Please indicate which 404 Permit the USACE has authorized for this project.
? Please provide copies of the application, copies of the site plans or other supporting documentation.
? Please resubmit copies of your information on the March 2005 PCN form or a more recent version. You can download this
format the following web address: (see http://h2o.enr.state. nc.us!new-etlandsidocuments PCNi-evisioiiMar08.doc)
? Please submit electronic CAD files showing via email to ian.mcmillan(d)ncmail.net and provide a CD (TIFF
Group 4 format (black and white, not grayscale or color)) along with your response to the additional information requested.
? Please provide stream determination documentation on the site (upstream and downstream photos and DWQ stream
identification forms).
? Please provide a qualitative indirect and cumulative impact analysis for the project. Please see DWQ's policy for guidance on
our website at: http://h2o.enr.state.nc.us/ncwetlands/documents/InterimIntemalPolicyCumulativeImpact.doc
? For areas in nutrient sensitive waters (NSW) or buffered river basins fertilizer specifications for stormwater BMPs should state
that that only an initial minimal application of fertilizer to establish the plants shall be used.
? Please indicate whether or not the proposed impacts have already been conducted.
? Please provide proposed septic fields on all (or) lots showing that additional impacts will not be
required.
Notes:
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