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HomeMy WebLinkAboutSW6110103_Supplement-EZ Form_20230127JSOC - Microgrid Project number: 60652522 Attachment B — NCDEQ Supplement and O&M Forms AECOM SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name 2 Project Area ac 3 Coastal Wetland Area (ac) JSOC - MICROGRID INSTALLATION AND INTEGRATION 3.38 1 6 1 Does this project use an off -site SCM? I No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided feet 30 8 Will the vegetated setback remain vegetated? N/A 9 If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ? N/A 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 1 Infiltration System 1 12 Bioretention Cell 1 13 Wet Pond 14 Stormwater Wetland 15 Permeable Pavement 16 Sand Filter 17 Rainwater Harvesting RWH 18 Green Roof 19 Level Spreader -Filter Strip LS-FS 20 Disconnected Impervious Surface DIS 21 Treatment Swale 22 1 Dry Pond 23 StormFilter 24 Silva Cell 25 Bayfilter 26 Filterra FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Brian D. Fisher 28 Organization: AECOM 29 Street address: 10 S. Jefferson, Suite 1600 30 City, State, Zip: Roanoke, VA 24011 31 Phone numbers : 540-857-3226 32 1 Email: brian.fisher@aecom.com Certification Statement: I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision; that the information provided in the form is, to the best of my knowledge and belief, true, accurate, and complete; and that the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here. ��j1EISIAI��/ SEAL 046338 ��UGI.AS Seal Signature of Designer Date 10113h?- DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 4 3 Does this project have low density areas? No 4 If so, number of low density drainage areas 0 5 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 2 4 Type of SCM -- Infiltration Trench Bioretention SITE 1 5 Total drainage area (sq ft 147,233 sf 85,000 sf 23,647 sf 6 Onsite drainage area (sq ft 119,000 sf 80,275 sf 23,647 sf 7 Offsite drainage area (sq ft 4,725 sf 4,725 sf 8 JTotal BUA in project (sq ft 94,139 sf 58,947 sf 17,466 sf 9 New BUA on subdivided lots (subject to permitting) (sq ft) 10permitting) New BUA not on subdivided lots (subject to sf 15,181 sf 547 sf 12,890 sf 11 Offsite BUA (sq ft) 1,650 sf 1,650 sf 12 Breakdown of new BUA not on subdivided lots: - Parking (sq ft) 24,850 sf 24,850 sf - Sidewalk (sq ft 5,050 sf 5,050 sf - Roof (sq ft - Roadway s ft - Future (sq ft - Other, please specify in the comment box below (sq ft) 23,400 sf 23,400 sf sf sf 17,634 sf 3,000 sf 12,890 sf 13 New infiltrating permeable pavement on subdivided lots (sq ft) 14 New infiltrating permeable pavement not on subdivided lots (sq ft 15permitting) Existing BUA that will remain (not subject to s ft 8,669 sf 450 sf 16 Existing BUA that is already permitted (sq ft 58,400 sf 58,400 sf 17 Existing BUA that will be removed (sq ft) 6,140 sf 1,023 sf 18 Percent BUA 64% 69% 74% 19 Design storm (inches) -- 1.0 in 1.0 in 20 Design volume of SCM (cu ft) -- 4,912 cf 1,074 cf 21 Calculation method for design volume -- Simple Simple ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): LINE 8, Entire Site: For Total BUA in project -add. impery from permit = (2.49x61 %) =66,163 sf-58,400 sf (to trench SCM)=7,763 sf + impery to SCMs + impery in bypass areas LIINE 12, Other: DA-1, permitted=3,000 sf (other on -site); permit MOD=547 sf (new BUA) to trench SCM. DA-2: for permit MOD: 12,890 (new BUA) from fuel containment and assoc pvmt, treated in new SCM DRAINAGE AREA INFORMATION Entire Site 1 2 Bioretention SITE 1 3 4 4 Type of SCM -- Infiltration Trench Bypass SITE 1 Bypass SITE 2 5 Total drainage area (sq ft) 147,233 sf 85,000 sf 23,647 sf 3006 12072 6 Onsite drainage area (sq ft 119,000 sf 80,275 sf 23,647 sf 3006 12072 7 Offsite drainage area (sq ft) 4,725 sf 4,725 sf 8 ITotal BUA in project (sq ft 94,139 sf 58,947 sf 17,466 sf 3006 sf 6957 sf 9 New BUA on subdivided lots (subject to permitting) (sq ft 10permitting) New BUA not on subdivided lots (subject to sf Offsite BUA (sq ft) 15,181 sf 547 sf 12,890 sf 470 sf 1274 sf 11 1,650 sf 1,650 sf 12 Breakdown of new BUA not on subdivided lots: - Parking (sq ft 24,850 sf 24,850 sf - Sidewalk (sq ft 5,050 sf 5,050 sf - Roof (sq ft) 23,400 sf 23,400 sf - Roadway (sq ft) sf - Future (sq ft sf - Other, please specify in the comment box below (sq ft) 17,634 sf 3,000 sf 12,890 sf 470 sf 1274 sf 13 New infiltrating permeable pavement on subdivided lots (sq ft 14 New infiltrating permeable pavement not on subdivided lots (sq ft) 15permitting) Existing BUA that will remain (not subject to s ft 8,669 sf 450 sf 2536 sf 5683 sf 16 Existing BUA that is already permitted (sq ft) 58,400 sf 58,400 sf 17 Existing BUA that will be removed (sq ft 6,140 sf 1,023 sf 5117 sf 18 Percent BUA 64% 69% 74% 100% 58% 19 Design storm inches -- 1.0 in 1.0 in -- -- 20 Design volume of SCM cu ft -- 4,912 cf 1,074 cf -- -- 21 Calculation method for design volume -- INFORMATION Please use this space to provide any additional information about the drainage area(s): Simple Simple -- -- ADDITIONAL Reprint of DRAINAGE AREA INFORMATION with all "BYPASS" columns included 22 LINE 8, Entire Site: For Total BUA in project -add. impery from permit = (2.49x61 %) =66,163 sf-58,400 sf (to trench SCM)=7,763 sf + impery to SCMs + impery in bypass areas LIINE 12, Other: DA-1, permitted=3,000 sf (other on -site); permit MOD=547 sf (new BUA) to trench SCM. DA-2: for permit MOD: 12,890 (new BUA) from fuel Illcontainment and assoc pvmt, treated in new SCM BIORETENTION CELL 1 Drainage area number 2 2 Minimum required treatment volume cu ft 1074 cf GENERAL MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build -out? Yes 4 Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H:V)? 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? Yes 7 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes 9 What is the method for dewatering the SCM for maintenance? Pump (preferred) 10 If applicable, will the SCM be cleaned out after construction? Yes 11 Does the maintenance access comply with General MDC (8)? Yes 12 Does the drainage easement comply with General MDC (9)? N/A 13 If the SCM is on a single family lot, does (will?) the plat comply with General MDC (10)? Is there an O&M Agreement that complies with General MDC (11)? N/A 14 Yes 15 Is there an O&M Plan that complies with General MDC (12)? Yes 16 Does the SCM follow the device specific MDC? Yes 17 lWas the SCM designed by an NC licensed professional? Yes BIORETENTION CELL MDC FROM 02H .1052 18 SHWT elevation (fmsl) 255.20 19 Bottom of the bioretention cell (fmsl) 260.00 20 Ponding depth of the design storm (inches) 9 in 21 Surface area of the bioretention cell (square feet) 1260 sf 22 Design volume of SCM (cu ft) 1092 cf 23 Is the bioretention cell used for peak attenuation? Yes 24 Depth of peak attenuation over planting surface (in) 18 in 25 Height of peak attenuation outlet above the planting surface (in) 9 in 26 Infiltration rate of the in situ soil (inch/hour) 0.50 in/hr 27 Diameter of the underdrain pipes (if applicable) 6", 8" 28 Does the design include Internal Water Storage (IWS)? Yes 29 if so, elevation of the top of the IWS (fmsl) 262.50 30 Elevation of the planting surface (fmsl) What type of vegetation will be planted? (grass, trees/shrubs, other)? Media depth (inches) 264.00 31 Grass 32 30 in 33 Percentage of medium to coarse washed sand by volume 75%-85% 34 Percentage of fines (silt and clay) by volume 8%-10% 35 Percentage of organic matter by volume 5%-10% 36 Type of organic material Engineered Fill 37 Phosphorus Index (P-Index) of media (unitless) < 50 38 Will compaction be avoided during construction? Yes 39 Will cell be maintained to a one inch/hour standard? Yes 40 Depth of mulch, if applicable (inches) N/A 41 IType of mulch, if applicable N/A 42 How many clean out pipes are being installed? 3 43 Type of pretreatment that will be used: Additional Information ADDITIONAL 44 INFORMATION Please use this space to provide any additional information about the bioretention cell(s): (1) pretreatment: containment tank and grass swale. (2) project located at Fort Bragg - no easements required (3) boring B-2 ground elev=268.2+/- (see Sheet CD101); boring advanced 13' with no SHWT encountered; SHWT Elev 255.2 given is terminal elev of boring; bottom of bioret = 260 feet. (4) Drawings require "Engineered Fill" to consist of 5-10% organic material (such as pine bark fines). Permit Number: (to be provided by DWQ) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. BDF CG501 1. Plans (1" - 50' or larger) of the entire site showing: Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Cell dimensions, Pretreatment system, High flow bypass system, Maintenance access, Recorded drainage easement and public right of way (ROW), Clean out pipe locations, Overflow device, and Boundaries of drainage easement. BDF CG501 2. Plan details (1" = 30' or larger) for the bioretention cell showing: - Cell dimensions Pretreatment system, High flow bypass system, Maintenance access, Recorded drainage easement and public right of way (ROW), Design at ultimate build -out, Off -site drainage (if applicable), Clean out pipe locations, Overflow device, and Boundaries of drainage easement. Indicate the P-Index between 10 and 30 BDF CG501 3. Section view of the bioretention cell (1" = 20' or larger) showing: Side slopes, 3:1 or lower Underdrain system (if applicable), and Bioretention cell layers [ground level and slope, pre-treatment, ponding depth, mulch depth, fill media depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable), SHWT level(s), and overflow structure] BDF ATTACHMENT-G 4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The ATTACHMENT-H results of the soils report must be verified in the field by DWQ, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in situ soil must include: Soil permeability, Soil composition (% sand, % fines, % organic), and P-index. Form SW401-Bioretention-Rev.8 June 25, 2010 Parts I and 11. Design Summary, Page 3 of 4 Permit Number: (to be provided by DWQ) BDF CG501 5. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing: (SOD) A variety of suitable species, Sizes, spacing and locations of plantings, Total quantity of each type of plant specified, A planting detail, The source nursery for the plants, and Fertilizer and watering requirements to establish vegetation. BDF CG101 6. A construction sequence that shows how the bioretention cell will be protected from sediment until the CE101 entire drainage area is stabilized. BDF ATTACHMENT-D 7. The supporting calculations (including underdrain calculations, if applicable). BDF ATTACHMENT-B 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement. N/A N/A 9. A copy of the deed restriction. Form SW401-Bioretention-Rev.8 June 25, 2010 Parts I and 11. Design Summary, Page 4 of 4 DEPARTMENT OF THE ARMY US ARMY INSTALLATION MANAGEMENT COMMAND HEADQUARTERS, UNITED STATES ARMY GARRISON, FORT BRAGG 2175 REILLY ROAD, STOP A FORT BRAGG NORTH CAROLINA 28310-5000 October 6, 2022 Department of Environmental Quality Division of Energy, Mineral and Land Resources Stormwater Permitting Program 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Subject: JSOC, C4 Facility (L166362) (2012) and Microgrid Installation and Integration (2022) Dear Sir/Madam: In lieu of Form SW401-O&M, Ft Bragg will comply with NPDES Phase II Permit # NCS000331. Fort Bragg NPDES Phase II Permit # NCS000331 Part II.F.l.b&c requires development and implementation of strategies which include a combination of structural and /or non-structural best management practices (BMPs) and ensure long-term operation and maintenance of BMPs. Additionally, Part II.G.2.h requires Ft Bragg to maintain and implement an O&M program for structural stormwater controls. The 0&M program shall specify the frequency of inspection and routine maintenance requirements. Ft Bragg shall inspect and maintain all structural stormwater controls in accordance with the schedule developed by Ft Bragg. Ft Bragg's Stormwater Control Measures Inspection and Maintenance Manual fulfills these requirements of the NPDES Phase II permit. Fort Bragg military installation is committed to maintaining compliant environmental programs while ensuring full mission support. If you have any questions on the information provided please contact Mr. Lee Ward, Chief, Water Management Section, Environmental Division at (910)308-2686 or lee.p.ward.civ@mail.mil . Sincer , _ Z:I)z dlr/� Lh� David A. Heins Chief, Environmental Division Directorate of Public Works Permit Number: (to be provided by DWQ) Drainage Area Number: Bioretention Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important operation and maintenance procedures: — Immediately after the bioretention cell is established, the plants will be watered twice weekly if needed until the plants become established (commonly six weeks). — Snow, mulch or any other material will NEVER be piled on the surface of the bioretention cell. — Heavy equipment will NEVER be driven over the bioretention cell. — Special care will be taken to prevent sediment from entering the bioretention cell. — Once a year, a soil test of the soil media will be conducted. After the bioretention cell is established, I will inspect it once a month and within 24 hours after every storm event greater than 1.0 inches �}. Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblems: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to bioretention cell erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. The inlet device: pipe, The pipe is clogged (if Unclog the pipe. Dispose of the stone verge or swale applicable). sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Stone verge is clogged or Remove sediment and clogged covered in sediment (if stone and replace with clean stone. applicable). Form SW401-Bioretention O&M-Rev.3 Page 1 of 4 BMP element: The pretreatment area The bioretention cell: vegetation The bioretention cell: soils and mulch Potential problems: Flow is bypassing pretreatment area and/or gullies have formed. Sediment has accumulated to a depth greater than three inches. Erosion has occurred Weeds are present. Best professional practices show that pruning is needed to maintain optimal plant health. Plants are dead, diseased or dying. Tree stakes/wires are present six months after planting. Mulch is breaking down or has floated away. Soils and/or mulch are clogged with sediment. An annual soil test shows that pH has dropped or heavy metals have accumulated in the soil media. How I will remediate the problem: Regrade if necessary to route all flow to the pretreatment area. Restabilize the area after grading. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and restabilize the pretreatment area. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Remove the weeds, preferably by hand. Prune according to best professional practices. Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Remove tree stake/wires (which can kill the tree if not removed). Spot mulch if there are only random void areas. Replace whole mulch layer if necessary. Remove the remaining much and replace with triple shredded hard wood mulch at a maximum depth of three inches. Determine the extent of the clogging - remove and replace either just the top layers or the entire media as needed. Dispose of the spoil in an appropriate off -site location. Use triple shredded hard wood mulch at a maximum depth of three inches. Search for the source of the sediment and remedy the problem if possible. Dolomitic lime shall be applied as recommended per the soil test and toxic soils shall be removed, disposed of properly and replaced with new planting media. Form SW401-Bioretention O&M-Rev.3 Page 2 of 4 BMP element: Potential problems: How I will remediate the problem: The underdrain system Clogging has occurred. Wash out the underdrain system. (if applicable) The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose of the sediment off -site. The drop inlet is damaged Repair or replace the drop inlet. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. Form SW401-Bioretention O&M-Rev.3 Page 3 Of 4 Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name: JSOC - Microgrid Installation and Integration tion (PN97470) BMP drainage area number: 2 Print name: Title: Address:— Phone: — Signature: Date: Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. I, , a Notary Public for the State of County of , do hereby certify that personally appeared before me this day of 1 , and acknowledge the due execution of the forgoing bioretention maintenance requirements. Witness my hand and official seal, SEAL My commission expires Form SW401-Bioretention I&M-Rev. 2 Page 4 Of 4