20021169 Ver 4_Triage Comments_20101029

Use this form instead of writing inside the folder
Tr' a Com ent Sheet
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DwQ# ?'
Triaged By:
Reviewer 1
Reviewer 2
Reviewer 3
Date: tol,?% /1D
Date: U
Date:
? Issue Project (Reviewer 1) ? Issue Project (Reviewer 2)
? Issue with conditions (Reviewer 1)

? Issue with conditions (Reviewer 2)

?
? More Information (Reviewer 1)
Return Application (Reviewer 1)
Send to Regions (Reviewer 1) More Information (Reviewer 2)
? Return Application (Reviewer 2)

? Send to Regions (Reviewer 2)
SATriage Forms\Triage Issue Sheet.doc
PLEASE PRINT CLEARLY
DWQ#: ??? 116 -Date: Who Reviewed:,XXL?l PA
Plan Detail Incomplete
? Please provide a location/most recent bound and published county soil survey/USGS 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 75o 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 hq://portal.ncdenr.org/weWwq/ws/su/bmp-manuao.
? Please submit a Level Spreader Supplement Form with all required items for each proposed level spreader (see
http://portal.nedenr.oTgtwcbtwgtws/s&bmp-manual).
? 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 type of vegetated filter strip (5% for riparian buffer VFS, and 8% for engineered filter strip). 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 30 percent
TN and TP. For each proposed BMP, provide a completed BMP Supplement Form with all the required items
(hnp://portal.ncdenr.org/web/wq/ws/sWbmp-manual).
? 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.
? [Drainage Area Map and Percent Imperviousness Breakdown]
? Please delineate the drainage areas on the site plan (Drainage area map on full plan sheets).
? Please provide the overall percent imperviousness of the project, and an inventory of impervious surfaces in each
drainage area. The inventory should include all proposed building footprints, roads, driveways, sidewalks, gravel-
surfaced areas, amenity areas, etc.
? [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
http://portal.ncdenr.org/web/wq/swptws/401/Cartsandpermitstswmanagement). For each proposed BMP, please provide a completed BMP Supplement
Form with all required items (see http://poral.nedenr.orgtweb/wq/Ws/s&bmp-manual).
? [Low Density] Per the requirements of GC , this project is categorized as low density. For each vegetated stormwater
conveyance, please provide a completed Low Density Supplement Form along with all supporting information (see
http://portal.nedenr.org/webtwq/ws/sulbmp-manual).
? Please provide a BMP Supplement Form with all required items for every BMP on the site (see http:uportal,nodenr.org/web/wq/ws/su/bmp-
manual).
? Please use the most current version of the BMP Supple Form (see: http://portal.nedenr.org/web/wq/ws/su/bmp-manual).
0 A nt .
Mit77b t? of com ensato S1i mitigation is re t. Please provide a compensatory
1? ry required for this project. 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 the proposed buffer impacts. Please submit a mitigation plan detailing the amount of buffer
impact for Zone 1 and/or Zone 2 and how the impact will be mitigated.
? Please provide documentation from an appropriate mitigation bank or the NCEEP indicating their willingness to accept your
request to purchase (type of mitigation) credit to mitigate for the proposed
(type of mitigation) impacts listed in your PCN application per Section D. Mitigation provider selection must conform to the
requirements of G.S. 143-214.11 (for wetland and stream mitigation) or G.S. 143-214.20 (for riparian buffer mitigation).
Other
M 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 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 resubmit copies of your information on the January 2009 PCN form or a more recent version. You can download
this format the following web address: (see http://www.saw.usace.army.mil/WETLANDS/pcno
? Please submit electronic CAD files showing , via email to [e-mail] 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: ho://poital.ncdenr.org/web/wg/swp/ws/401/policies
? 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 complete Section of the PCN Form.
? Please provide proposed septic fields on all (or) lots showing that additional impacts will not be
required.
? Please resubmit 3 copies of your information on the July 2009 Variance Application Form.
? Variance application forms must be signed by the owner. Please resubmit the application page of the variance application with
the owner's signature.
? The proposed buffer impacts in your application require a major variance from the Environmental Management Commission.
Please submit 3 copies of your information of the July 2009 Variance Application Form with supporting documentation.
? Please provide one (1) data CD of full size plans in TIFF Group 4 format (black and white, not grayscale or color). If the
q ?V,
The applicant requested a detailed wetland delineation and buffer evaluation on the
property prior to site plan development in order to avoid jurisdictional wetlands and
waters and riparian buffers to the maxim ext t practicable. The proposed ro s
and sewerline will impact approximate . 87 cres of jurisdictional wetland 5
linear feet of intermittent channel, an 135 f perennial channel. Temporary impacts
associated with the installation of the sanitary sewer consist of 66 linear feet of channel
impact. These impacts are elaborated upon within the attached PCN form and are shown
on the attached inset impact maps.
The proposed roadways are needed to gain access to the entire property. It is necessary to
cross the northernmost channel twice with im acts R1 and R2 in order to comply with the
own of Ca 's connectivity and cul- a-sac len es ee a ace impac
justification letter dated 7/157M). Road crossing R3 impacts a perennial stream that
bisects the property from east to west and is unavoidable in order to access the southern
portion of the property. Impacts were minimized, however, by reducing the roadway
section, using 2:1 fill slopes, and crossing at a near perpendicular angle (see attached
impact justification letter-7/15/02). Also, the applicant would ideally align the sewerline
crossing (impact R4) below the confluence of the two streams in order to decrease the
linear footage of impact. This is not possible, however, due to the location of the existing
pump station, which necessitates crossing near the confluence of the two streams (see
attached impact justification letter-7/15/02).
The USACE's current policy requires applicants to avoid and minimize wetland and
stream channel impacts to the maximum extent practicable and compensatory mitigation
to offset unavoidable losses of waters of the US when impacts exceed the requirements
for notification (0.10 acre). The proposed roads and sewerline are necessary to access the
entire property and provide sanitary service to the residential subdivision, as discussed
above and in the attached impact justification letter. Because the applicant has
minimized impacts to the maximum extent practicable and will maintain riparian buffers
as per the Town of Cary buffer rules, S&EC believes further compensatory mitigation
should not be required by the USACE.
NC-DWQ's current policy requires written concurrence for stream impacts of greater or
equal to 150 linear feet of stream length per project. We request written concurrence that
the project complies with the 401 Water Quality Certification associated with Nationwide
Permit 12 and 39. NC-DWQ's current policy does not require wetland or stream
mitigation for perennial stream channel impacts below 0.1 acre and 150 linear feet per
project. Because the total permanent impacts to perennial channels are less than 150 feet
and only 0.0887 acres of wetlands impacts are proposed, we do not believe that wetland
nor stream mitigation should be required by NC-DWQ. Please note that following
construction the site will contain les han 24° ' ustification letter-
7/15/02). Because wetland impacts are below 0.1 acres and because impervious surface
will be less than 30%, we do not believe that this project requires a pre-approved
stormwater plan.
?A r, ?'_
2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
separately list impacts due to both structure and flooding.
Wetland Impact Type of Wetland Located within Distance to Area of
Site Number Type of Impact (e.g., forested, marsh, 100-year
Floodplain Nearest
Stream Impact
(acres)
(indicate on map) herbaceous, bog, etc.) ( es/no) linear feet)
Impact 2 Fill Headwater Forest No 250 ft 0.049
Impact 3 Fill Headwater Forest No 400 ft 0.034
Impact 4 Fill Headwater Forest No 400 ft 0.071
Total Wetland Impact (acres) 0.154
3. List the total acreage (estimated) of all existing wetlands on the property: <1 acre
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
must be included. To calculate acreage. multiply length X width. then divide by 43.560.
Stream Impact Type of Perennial or Average Impact Area of
Number Stream Name Impact Intermittent? Stream Width Length Impact
(indicate on ma) Before Impact (linear feet (acres)
Impact I UT to Bachelor Branch Culvert Perennial 4 147 0.013
Impact 5 UT to Bachelor Branch Temporary Perennial 4 24 0.002
Total Stream Impact (by length and acreage) 171 0.015
Impact 5 is a temporary impact due to utility line installation.
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill, excavation. dredging. flooding. drainage. bulkheads. etc.
Open Water Impact Name of Waterbody Type of Waterbody Area of
Site Number (if applicable) Type of Impact (lake, pond, estuary, sound, bay, Impact
indicate on ma ocean, etc. (acres)
NA NA NA NA NA
Total Open Water Impact (acres) NA
6. List the cumulative impact to all Waters of the U.S. resulting from the nroiect:
Stream Impact (acres): 0.015
Wetland Impact (acres): 0.154
Open Water Impact acres): NA
Total Impact to Waters of the U.S. (acres) 0.17
Total Stream Impact (linear feet): 171
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