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Home My WebLink AboutSW3190806_Add Info_20191106ROY COOPER Governor MICHAEL S. REGAN Secretary S. DANIEL SMITH Director Brian Rossi, PE 301 McCullough Drive, Suite 109 Charlotte, NC 28262 NORTH CAROLINA Environmental Quality November 6, 2019 Subject: Request for Additional Information Stormwater Permit No. SWA000022 Courtyards at Emerald Lake Union County Dear Mr. Rossi: The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater Management Permit Application for the subject project on October 24, 2019. A review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: Please correct the following issues with the Final Permit Submittal Checklist and supporting documents: a. Item 1 — Application Form SWU 101: i. Section II, lb — Permit number should be SWA000022, not SW000022 ii. Section IV, 2 — The fast track process cannot be used for projects that are claiming vested rights, 15A NCAC 02H .1043(l)(a). iii. Section VI — Please initial these required items indicating that they have been included in the application. iv. Section VI, 2 — Please provide the original, notarized, deed restriction document. v. Section VI, 8 — Please provide 2 sets of plans addressing items a through p of this section. vi. Section VI, 9 — Please provide a soils report showing the SHWT for each SCM. vii. Section VI, I I — Please provide documents showing that Mr. Kardos is affiliated with Epcon Marvin, LLC. b. Item 2 — Supplement EZ Form: i. Drainage Areas Sheet: 1. Please fill out the "Entire Site" column. 2. Line 8 — Offsite area does not match the Application. Please revise for consistency. 3. Line 19 — Design volume should be the WQ volume, not the total volume that can be stored above the permanent pool. D EQ North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources 512 North Salisbury Street 1 1612 Mail Service Center I Raleigh, North Carolina 27699-1612 NORTH CAROLINA _ o.PaWnamofEnvironmental Quality /� 919.707.9200 ii. Wet Pond Sheet: 1. Line 2 & 35 — Design volume should be the WQ volume, not the total volume that can be stored above the permanent pool. 2. Line 9 — Drawdown/dewatering orifice is not shown on as -built plans. 3. Line 19 — The stage storage tables have only been provided for the temporary storage areas and the forebay of BMP 3. Please provide As - built stage storage table for the main pools and the forebay of BMP 1 & 2. 4. Line 25 — These values do not match the as -built plans. 5. Line 27 — This value should be the volume of the permanent pool that is not located in the forebay. 6. Line 34 — Lines 20 & 21 indicate that the cleanout depth is 12 inches and this line indicates that it is 6 inches. Please revise for consistency. 7. Line 37 — Orifice diameters do not match the as -built plans. 8. Line 42 — Berms and baffles do not appear to be provided. 9. Line 53 — Please provide the type of turf that has been planted on the dam/embankment. c. Item 6 — Signed, sealed and dated site plans: i. Check this item off on the checklist and provide 2 hard copies and one electronic copy of the site plans. d. Item 7.c — Wet Pond Planting Plan: i. Please provide a planting plan for the wet ponds. e. Item 8 — Recorded Documents: i. Please check this item off on the checklist. ii. 8.b — Please provide the original, notarized deed restriction document. iii. 8.c — Please provide plant(s) with the drainage easements shown. Item 9 — As -Built Designer MDC Certification: i. General: If the item is the same on the as -built plans as it was on the approved plans, select "Y". If the value was changed on the as -built plans from the approved plans, select "N" and explain why the value differed at the end of the checklist. If the item does not pertain to the project, select "N/A". Please ensure that each item is appropriately categorized as "Y", "N", or "N/A". ii. Wet Pond 1 (Sheet C5.6) 1. As -Built Designer's Certification for General MDC a. Treatment Requirements i. 2) — Project does not meet Runoff Volume Match. ii. 7) — The following MDCs are not met: 9 & 10 b. Stormwater Outlets i. Provide riprap sizing calculations to verify this. 2. As -Built Designer's Certification for Wet Detention Pond a. Forebay/Depths/Fountain i. 1) Sediment storage depth not shown on plans. ii. 4) Select an option. iii. 6) Fountain documentation must be provided (It's an MDC). b. As -built i. 1) Permitted Permanent Pool Surface Area = 19,267 sf. As -built Permanent Pool Surface Area = 23,258 sf. ii. 4) Permitted Temporary Pool Elevation = 635.86 ft. As - built Temporary Pool Elevation = 635.74 ft. c. Inlets/Outlets/Drawdown i. 3) A trash rack is required (It's an MDC). iii. Wet Pond 2 (Sheet C5.7) 1. As -Built Designer's Certification for General MDC a. Treatment Requirements i. 2) — Project does not meet Runoff Volume Match. ii. 7) — The following MDCs are not met: 9 & 10 b. Stormwater Outlet i. Provide riprap sizing calculations to verify this. 2. As -Built Designer's Certification for Wet Detention Pond a. Forebay/Depths/Fountain i. 1) Sediment storage depth not shown on plans. ii. 4) Select an option. iii. 6) Fountain documentation must be provided (It's an MDC). b. As -built i. 1) Permitted Permanent Pool Surface Area differs from As -built Permanent Pool Surface Area. ii. 3) Permitted Permanent Pool Elevation = 639.30 ft. As - built Permanent Pool Elevation = 639.28 ft. iii. 4) Permitted Temporary Pool Elevation = 640.01 ft. As - built Temporary Pool Elevation = 640.02 ft. c. Inlets/Outlets/Drawdown i. 3) A trash rack is required (It's an MDC). g. Item 10 — As -Built Permittee Certification i. Deed Restrictions/BUA Records 1. Provide deed restriction information. ii. Easement 1. 2) Provide plat(s). iii. Single Family Residential Lots 1. SCMs are not located on individual lots. These should all be "N/A". iv. O&M Agreement 1. 1) Final recorded plat should reference the O&M Agreement. It does not matter that the O&M Agreement was signed before the plat was recorded. 2. 2) Provide documentation of this. v. O&M Maintenance Plan 1. Provide documentation showing where the maintenance records are being kept. 2. Please provide additional information on the rain garden (RG-1) if it is being used for stormwater management. 3. Provide pdfs of all revisions, 2 hardcopies of revised plan sheets, and 1 hardcopy of other documents. Pdfs must be uploaded using the form at: https://edocs.deq.nc.gov/Forms/SW Project Submittal Please note that this request for additional information is in response to a preliminary review. The requested information should be received by this Office prior to December 6, 2019, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. Please reference the State assigned project number SWA000022 on all correspondence. If you need additional time to submit the information, please submit your request for a time extension to the Division at the contact below. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. If you have any questions concerning this matter please feel free to contact me at Jim.Farkas@ncdenr.gov or (919) 707-3646. Sincerely, ✓_ vl Jim Farkas Environmental Engineer Stormwater Program cc: Mooresville Regional Office