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Home My WebLink About20110594 Ver 2_More Info Received_20120130Strickland, Bev From: Witherspoon, Lauren Sent: Monday, January 30, 2012 12:35 PM To: Strickland, Bev Subject: FW: UNC -CH Landfill Gas Project, DWQ Project # 11 -0594 v.2 Attachments: 20120112091948898.pdf; gasline - soils.pdf; Vicinity_Exhibit 2_revised_opt_l 0191 1.pdf; 20120112092009987. pdf For laserfiche Thanks, lauren - - - -- Original Message---- - From: Mvers, Sharon (Environment Health & Safety) fmailto:samvers ciehs.una.edul Sent: Thursdav, January- 12, 2012 10:03 AM To: Witherspoon, Lauren Subject: UNC -CH Landfill Gas Project, DWQ Project 4 11 -0594 w.2 Hi Lauren, I sent the paper version of UNC's response to DWQ's request for additional information to Karen Higgins yesterday. I've attached pdfs of the submittal for your review, in case it takes a -while for the paper copy to reach you. Please let me kno-w if you have questions. Thank vou. Sharon 2. Wetland Impacts If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted. 2a. 2b. 2c. 2d. 2e. 2f. Wetland impact Type of jurisdiction number — Type of impact Type of wetland Forested (Corps - 404, 10 Area of impact Permanent (P) or (if known) DWQ — non -404, other) (acres) Tem ora T W1 ®P ❑ T Permanent impacts for installation of Palustrine Yes ®Corps 0.008 transmission line Forested (PFO) El No El DWQ W2 ❑ P ❑ T trenching PFO (Wetland F) F1 Yes ❑ No ® Corps ❑ DWQ 0 W3 ❑ P ❑ T trenching PFO (Wetland C) ❑ Yes ❑ No ® Corps ❑ DWQ 0 W4 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W5 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W6 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ 2g. Total wetland impacts 0.008 2h. Comments: Pre - construction grades will be re- established in the permanently impacted wetland following installation of the gas transmission line. As the gas transmission line traverses the Carolina North property, it will be co- located with the Duct Bank Utility Line Project in order to minimize environmental impacts. The Duct Bank Project will have already cleared a construction corridor. Then, the Duct Bank will be installed first and the gas transmission line installation will immediately follow. Following constrruction completion, pre - construction grade will be re- established at Wetlands C and F, and the areas will be revegetated with native wetland plants. 3. Stream Impacts If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this question for all stream sites impacted. 3a. 3b. 3c. 3d. 3e. 3f. 3g. Stream impact Type of impact Stream name Perennial Type of jurisdiction Average Impact number - (PE=R) or (Corps - 404, 10 stream length Permanent (P) or intermittent DWQ — non -404, width (linear Temporary (T) (INT)? other) (feet) feet) S1 ®P EI T culverted utility unnamed (N. of ❑ PER ® Corps 4 69(P) crossing Eubanks Rd.) ® INT ❑ DWQ 28(T) S2 ❑ P ❑ T directional bore Old Field Creek ® PER ® Corps 6 0 utility crossing (E. of flare station) ❑ INT 0 DWQ S3 ®P ®T culverted utility crossing within fill Old Field Creek (N, limit of Duke ® PER Corps 4 41 (P) section for road Energy easement) El INT El DWQ 10(T) crossing Old Field Creek S4 ® P ❑ T directional bore (forest south of PER ® Corps 4 0 utility crossing Duke Energy ❑ INT ❑ DWQ easement) S5 ❑ P ® T trenching Crow Branch ®PER ❑ INT Corps ❑ DWQ 6 0 S6 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ 3h. Total stream and tributary impacts 110 (P) 38 (T) 3i. Comments: Pump arounds will be used during the installation of the culverted crossings at S1 and S3, and directional boring will be used at S2 and S4. S1 is a ermanent impact of 69 linear feet of stream due to installation of a culvert and this Page 8 of 15 PCN Form — Version 1.3 December 10, 2008 Version impact has already occurred under the existing Nationwide 12 Permit (SAW -2011- 01294). An additional 28 linear feet of temporary impact was anticipated with construction at S1. The temporary impact at S1 includes the impacts from the pump around. At S2 and S4 directional boring will be used to install the utility crossings, so there will be no impact to the stream channels at these locations. S3 is a permanent impact of 41 linear feet of stream due to installation of a culvert. An additional 10 linear feet of temporary impact is anticipated with construction at S3, and this temporary impact includes the pump around for the culverted stream crossing. S5 is a crossing of Crow Branch on the Carolina North property. As the gas transmission line traverses the Carolina North property, it will be co- located with the Duct Bank Utility Dine Project in order to minimize environmental impacts. The Duct Bank Project will have already cleared a construction corridor. The Duct Bank utility line will be installed first and the gas transmission line installation will immediately follow, utilizing the same construction contractor. Original grade will be re- established following construction. 4. Open Water Impacts If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of the U.S. then individually list all open water impacts below. 4a. 4b. 4c. 4d. 4e. Open water Name of waterbody impact number — (if applicable) Type of impact Waterbody type Area of impact (acres) Permanent (P) or Temporary T 01 ❑P[IT 02 ❑P ❑T 03 ❑P ❑T 04 ❑P ❑T 4f. Total open water impacts 4g. Comments: 5. Pond or Lake Construction If pond or lake construction proposed, the complete the chart below. 5a. 5b. 5c. 5d. 5e. Wetland Impacts (acres) Stream Impacts (feet) Upland Pond ID Proposed use or purpose of (acres) number pond Flooded Filled Excavated Flooded Filled Excavated Flooded P1 P2 5f. Total 5g. Comments: 5h. Is a dam high hazard permit required? ❑ Yes ❑ No If yes, permit ED no: 5i. Expected pond surface area (acres): 5j. Size of pond watershed (acres): 5k. Method of construction: Page 9 of 15 PCN Form — Version 1.3 December 10, 2008 Version 5� 1,,D if � HrG f � •�. d \ AVS fT - ApC ,Ap Elba A He C...E -. +�v 4 { Nu 41F ' T.c s AnC Gb AAC Ea 0!C 1r8 En yrSa� �+► C,e[ Ge8 Gay GaG r. ` FnC En$ E G++C 1 �fic . c*c f -WMF G 'FP rt -+W4 - i :�� CSC - .� = GeR 1 - - S Iu8 LSItf! � fa: A Eni r � FRi3 i - - l 1 •.:if ? 11 M!S +k f TS ii+8 w•C r ,Li Pl F R lib HFC 0 n 'i 44,c [ { CnC H $ 1GaC ca GeG i f:nC f HNFf / .. ER8 Enii Ens G,e ;: ' 616- L co FnG ►IrC Hfu Co a E-, V 4 r F,.0 i Lew EnC Nos I fir$ Etli$ . EnN iir$ I S'iDkAC$WSLI:SJI } sf9A1'LPG1Ri L ` 0 knr; :11 fu8 f � �E• I'� F . yt ESL w i a'r lok ' i11rrr _ 1 1-srC CIE 5upty im 1) .5 6.v% OrA01r, C5 S6 'r 1 umAell UNCi January 11, 2012 The university of North Carolina at Chapel Hill Department of Environment, Health & Safety 1120 Estes Drive Ext., CB# 1650 Chapel dill, North Carolina 27599.1650 Ms. Karen Higgins North Carolina Division of Water Quality Raleigh Regional Office Surface Water Protection. 1628 Mail Service Center Raleigh, NC 27699.1628 Subject: UNC -CH Landfill Gas Project DWQ Project # 11 -0594 v.2 The University of North Carolina at Chapel Hill Orange County, North Carolina Dear Ms. Higgins: 1 am writing on behalf of The University of North Carolina at Chapel Hill (UNC -CH) in response to your December 13, 2011 Request for More Information. The North Carolina Division of Water Quality (DWQ) requests are shown in bold and UNC -CH's responses follow. Five copies of this response are provided. 1. Section B. 3a indicates that the Duct Bank has been previously permitted. Please provide the DWQ Project # information for the WQC and buffer authorization. The DWQ Project # for the Duct Bank is 11 -0476. 2. Has DWQ conducted buffer determinations for all streams depicted on the Soil Survey of Orange County (published version) and/or the USGS topographic snap (1:24000) within your project limits? if so, please provide a copy of this information. If not, please locate the project boundaries on the most recent bound and published Soil Survey of Orange County and the USGS 1 :24000 topographic map for the project. DWQ has not conducted field determinations for the portions of the project located north of Homestead Road in Chapel Hill, North Carolina. A copy of the Soil Survey of Orange County map with the location of the project boundaries is attached to this response. A USGS topographic map showing the project boundaries was provided in the 401 WQC application submitted on November 4, 2011 and is also provided with this response. 3. Please include temporary stream impacts associated with S1 (28 LF) and S3 (10 LF) in the Stream Impact Table Section C.3. The temporary stream impacts associated with S 1 and S3 have been included in the Stream Impact Table Section C.3. The revised table is attached. If you have any questions concerning response please contact me at (919) 962 -9752. Sincerely, Sharon A. Myers, L.G. Environmental Compliance Officer Enclosures cc: Mr. John Carter Dr. Daniel Elliott Ms. Diane Gillis Ms. Mary Beth Koza Mr. Andy Williams Page 2 of 2