SW3171201_Supplement-EZ Form_20180827

QuantityInfiltration System0Bioretention Cell 0Wet Pond 1Stormwater Wetland 0Permeable Pavement0Sand Filter3Rainwater Harvesting0Green Roof0Level Spreader-Filter Strip0Disconnected Impervious Surface 0Treatment Swale0Dry Pond4Applicant:Name and Title:Organization:Street address:City, State, Zip:Phone number(s):Email:DesignerCertification Statement:Signature of DesignerDateEmail:3037 Sherman DriveLancaster, SC 29720704-297-0693Company:Contact:Mailing Address:City, State, Zip:Project Name:AddressCity / TownLGI HomesJeff WebbBMPs 1, 2, 4, & 5Village at Granite Quarry - Phase 1Salisbury, Rowan Co3040 Faith RoadBMPs 1, 2 & 4 SUPPLEMENT-EZ FORM COVER PAGESealviolations as well as a report being made to my professional board. - that the information provided in the form is, to the best of my knowledge - that the engineering plans, specifications, operation and maintenancethe information provided here.I am aware that there are significant penalties for submitting falseinformation including the possibility of fines and imprisonment for knowing and belief, true, accurate, and complete; andagreements and other supporting information are consistent with I certify, under penalty of law: that this Supplement-EZ form and all supportinginformation were prepared under my direction or supervision; Designer information for this project:Location(s)Please indicate the types, quantities and locations of SCMs that will be used on this project:[e-mail] number(s):Hy V. Nguyen, PEDPR Associates, Inc420 Hawthorne LaneCharlotte, NC [e-mail] 3Cover Page111:42 AM 8/21/2018August 21, 2018
SAND FILTER1Drainage area number1Total coastal wetlands area (sq ft) N/A - Parking / driveway (sq ft)N/ATotal surface water area (sq ft)N/A - Sidewalk (sq ft)7,700 sfTotal drainage area (sq ft)217,800 sf - Roof (sq ft)64,885 sfBUA associated with existing development (sq ft) N/A - Roadway (sq ft)24,180 sfProposed new BUA (sq ft) 104,544 sf (Design) - Other, please specify in the comment box below (sq ft) N/APercent BUA of drainage area 48.0% (Design)Total BUA (sq ft)96,765 sf (Actual)Design rainfall depth (in)1.0 inMinimum volume required (cu ft) 8,748 cfDesign volume of SCM (cu ft)8,748 cf#1 Is the SCM sized to treat the SW from all surfaces at build-out? Yes#7 If applicable, with the SCM be cleaned out after construction?Yes#2 Is the SCM located on or near contaminated soils? No#8 Does the mainetenance access comply with General MDC (8)?Yes#3 What are the side slopes of the SCM (H:V)? 3:1#9 Does the drainage easement comply with General MDC (9)?Yes#3 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No#10 If the SCM is on a single family lot, does the plat comply with General MDC (10)?Yes#4 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes#11 Is there an O&M Agreement that complies with General MDC (11)?Yes#5 Is there a a bypass for flows in excess of the design flow? No#12 Is there an O&M Plan that complies with General MDC (12)?Yes#6 What is the method for dewatering the SCM for maintenance?Drawdown Orifice#13 Was the SCM designed by an NC licensed professional?Yes#1 SHWT elevation (fmsl)733.86 ft #3 Volume of stormwater from drainage area during design storm (cubic feet) 27,998 cf#1 Type of sand filter (open or closed) Open #3 Total volume that can be stored above the sediment and sand chambers (cubic feet) 36,020 cf#1 If closed, describe if the filter will be pre-cast or pour-in-place: #3 Is this sand filter designed to attenuate peak flows? Yes#3 Elevation of the bypass device (fmsl) N/A#1 If closed, top of grate elevation (fmsl) N/A#2 Volume that can be retained in the sediment chamber (cubic feet) 9,200 cf#2 Will there be a permanent pool in the sediment chamber? No#2 Bottom of the sediment chamber (fmsl)733.5 ft#4 Ponding depth from the top of the sand to the bypass device (ft) N/A#2 Area of the sediment chamber (square feet)12,000 cf#2 Physical depth of the sediment chamber (inches) 54 in#2 Ponding depth in the sediment chamber, above any permanent pool (inches)45 in#2 Elevation of top of weir between chambers (fmsl)735 ft#2 Volume that can be retained in the sand chamber (cubic feet) 8,748 cf#2 Bottom of the sand chamber (fmsl) 729.5 ft #7 Depth above underdrain pipe (inches) 33 in#2 Area of the sand chamber (square feet)1,000 sf#8 Will the media be maintained to drain at least two inches per hour at the sand surface? No#2 Physical depth of the sand chamber (inches) 42 in #9 Is at least one clean-out pipe provided at the low point of each underdrain line? Yes#2 Ponding depth in the sand chamber, above any permanent pool (inches)24 in#9 Will clean-out pipes be capped? YesTHE DRAINAGE AREAGENERAL MDC FROM 02H .1050Break down of BUA in the drainage area (both new and existing):COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAMStormwater program(s) that apply (please specify):Stormwater Detention Control 2 year ans 10 year storm events, Water Quality design to treat 100 % of the first inch of runoff.Please use this space to provide any additional information about this sand filter that you think is relevant to the review:SAND FILTER MDC FROM 02H .1056ADDITIONAL INFORMATIONN/AN/A#3 Describe the bypass device:#5 Describe the mechanism for distributing flow over the sand surface:#6 Sand specification for sand chamber ASTM C-33 MEDIUM AGGREGATE CONC. SAND or the equivalentN/AVillage at Granite Quarry - Phase 1Sand Filter19:32 AM 8/24/2018
SAND FILTERVillage at Granite Quarry - Phase 12Drainage area number2Total coastal wetlands area (sq ft) N/A - Parking / driveway (sq ft)N/ATotal surface water area (sq ft)N/A - Sidewalk (sq ft)12,660 sfTotal drainage area (sq ft)370,260 sf - Roof (sq ft)103,293 sfBUA associated with existing development (sq ft) N/A - Roadway (sq ft)40,444 sfProposed new BUA (sq ft) 177,725 sf (Design) - Other, please specify in the comment box below (sq ft) N/APercent BUA of drainage area 48.0% (Design)Total BUA (sq ft)156,337 sf (Actual)Design rainfall depth (in)1.0 inMinimum volume required (cu ft) 15,747 cfDesign volume of SCM (cu ft)15,747 cf#1 Is the SCM sized to treat the SW from all surfaces at build-out? Yes#7 If applicable, with the SCM be cleaned out after construction?Yes#2 Is the SCM located on or near contaminated soils? No#8 Does the mainetenance access comply with General MDC (8)?Yes#3 What are the side slopes of the SCM (H:V)? 3:1#9 Does the drainage easement comply with General MDC (9)?Yes#3 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No#10 If the SCM is on a single family lot, does the plat comply with General MDC (10)?Yes#4 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes#11 Is there an O&M Agreement that complies with General MDC (11)?Yes#5 Is there a a bypass for flows in excess of the design flow? No#12 Is there an O&M Plan that complies with General MDC (12)?Yes#6 What is the method for dewatering the SCM for maintenance?Drawdown Orifice#13 Was the SCM designed by an NC licensed professional?Yes#1 SHWT elevation (fmsl)719.73 ft #3 Volume of stormwater from drainage area during design storm (cubic feet) 53,505 cf#1 Type of sand filter (open or closed) Open #3 Total volume that can be stored above the sediment and sand chambers (cubic feet) 73,335 cf#1 If closed, describe if the filter will be pre-cast or pour-in-place: #3 Is this sand filter designed to attenuate peak flows? Yes#3 Elevation of the bypass device (fmsl) N/A#1 If closed, top of grate elevation (fmsl) N/A#2 Volume that can be retained in the sediment chamber (cubic feet)87,400 cf#2 Will there be a permanent pool in the sediment chamber? No#2 Bottom of the sediment chamber (fmsl)728.5 ft#4 Ponding depth from the top of the sand to the bypass device (ft) N/A#2 Area of the sediment chamber (square feet)20,900 sf#2 Physical depth of the sediment chamber (inches)72 in#2 Ponding depth in the sediment chamber, above any permanent pool (inches)60 in#2 Elevation of top of weir between chambers (fmsl)730 ft#2 Volume that can be retained in the sand chamber (cubic feet) 15,747 cf#2 Bottom of the sand chamber (fmsl) 724.5 ft #7 Depth above underdrain pipe (inches) 33 in#2 Area of the sand chamber (square feet)2,000 sf#8 Will the media be maintained to drain at least two inches per hour at the sand surface? Yes#2 Physical depth of the sand chamber (inches)30 in #9 Is at least one clean-out pipe provided at the low point of each underdrain line? Yes#2 Ponding depth in the sand chamber, above any permanent pool (inches)24 in#9 Will clean-out pipes be capped? YesBreak down of BUA in the drainage area (both new and existing):COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAMStormwater program(s) that apply (please specify):Stormwater Detention Control 2 year ans 10 year storm events, Water Quality design to treat 100 % of the first inch of runoff.THE DRAINAGE AREA#5 Describe the mechanism for distributing flow over the sand surface:N/A#6 Sand specification for sand chamber ASTM C-33 MEDIUM AGGREGATE CONC. SANDADDITIONAL INFORMATIONGENERAL MDC FROM 02H .1050SAND FILTER MDC FROM 02H .1056N/A#3 Describe the bypass device:N/APlease use this space to provide any additional information about this sand filter that you think is relevant to the review:Sand Filter29:32 AM 8/24/2018
WET POND1 Drainage area number3 Total coastal wetlands area (sq ft)N/A - Parking / driveway (sq ft)N/ATotal surface water area (sq ft)N/A - Sidewalk (sq ft)34,810 sfTotal drainage area (sq ft)958,320 sf - Roof (sq ft)205,895 sfBUA associated with existing development (sq ft) N/A - Roadway (sq ft)92,208 sfProposed new BUA (sq ft)459,994 sf (Design) - Other, please specify in the comment box below (sq ft) 126,930 sf Percent BUA of drainage area 48.0% (Design)Total BUA (sq ft)459,843 sf (Actual)Design rainfall depth (in)1.0 inMinimum volume required (cu ft)38,493Design volume of SCM (cu ft)108,082#1 Is the SCM sized to treat the SW from all surfaces at build-out? Yes#7 If applicable, with the SCM be cleaned out after construction?Yes#2 Is the SCM located on or near contaminated soils? No#8 Does the mainetenance access comply with General MDC (8)?Yes#3 What are the side slopes of the SCM (H:V)? 2:1#9 Does the drainage easement comply with General MDC (9)?Yes#3 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No#10 If the SCM is on a single family lot, does the plat comply with General MDC (10)?Yes#4 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes#11 Is there an O&M Agreement that complies with General MDC (11)?Yes#5 Is there a a bypass for flows in excess of the design flow? No#12 Is there an O&M Plan that complies with General MDC (12)?Yes#6 What is the method for dewatering the SCM for maintenance?Pump (preferred)#13 Was the SCM designed by an NC licensed professional?Yes#1 Method usedSA/DA#6 Width of the vegetated shelf (feet)6 ft#1 Surface area of the main permanent pool (square feet) 18,000 sf#6 Location of vegetated shelf@ Normal Pool#1 Volume of the main permanent pool (cubic feet) 74,500 sf#6 Elevation of top of shelf (fmsl)723 ft#2 Average depth of the main pool (feet) 6.5 ft #6 Elevation of bottom of shelf (fmsl)722 ft#2 Was the vegetated shelf included in the calculation of average depth? Yes #6 Slope of vegetated shelf (H:V)6:1#2 Elevation of the bottom of the permanent pool (fmsl) 716 ft #7 Diameter of drawdown orifice (inches)3.0 in#2 Elevation of the top of the permanent pool (fmsl) 722.5 ft #7 Drawdown time for the temporary pool (hours)96 hrs#2 Elevation of the top of the temporary pool (fmsl) 729.5 ft #7 Does the orifice drawdown from below the top surface of the permanent pool?No#3 Depth provided for sediment storage (inches) 12 in#8 Does the pond minimize impacts to the receiving channel from the 1-yr, 24-hr storm? Yes#4 Are the inlet(s) and outlet located in a manner that avoids short-circuiting?Yes #9 Are fountains proposed?Yes#9 If yes, is documentation provided per Wet Pond MDC (9)? Yes#10 Is a trash rack or other device provided to protect the outlet system? Yes#5 Volume of the forebay (cubic feet) 13,000 cf#11 Are the dam and embankment planted in non-clumping turf grass? Yes#5 Is this 15-20% of the volume in the main pool? Yes#11 Species of turf that will be used on the dam and embankment Matting#5 Depth of forebay at entrance (inches) 54 in#11 Describe the planting plan for the vegetated shelf:#5 Depth of forebay at exit (inches) 54 in#5 Does water flow out of the forebay in a non-erosive manner? Yes#5 Clean-out depth for forebay (inches) 12 in#5 Will the forebay be cleaned out when the depth is reduced to less than the above? NoTHE DRAINAGE AREABreak down of BUA in the drainage area (both new and existing):COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAMStormwater program(s) that apply (please specify):Stormwater Detention Control 2 year and 10 year storm events, Water Quality design to treat 100% of the first inch of runoff.WET POND MDC FROM 02H .1053#4 Describe any measures, such as berms or baffles, that will be taken to improve the flow path:2 forebays for pond with earth berms between main pool and forebay with riprap on top 4' vert.See Planting Plan on sheet L-12 (Cardinal Flower, Joe Pye Weed, Marsh Mallow, Duck Potato, Sweet Flag and Souther Blue Flag)ADDITIONAL INFORMATIONPlease use this space to provide any additional information about this wet pond that you think is relevant to the review:GENERAL MDC FROM 02H .1050Village at Granite Quarry - Phase 1Wet Pond19:31 AM 8/24/2018
SAND FILTERVillage at Granite Quarry - Phase 13Drainage area number4Total coastal wetlands area (sq ft) N/A - Parking / driveway (sq ft)N/ATotal surface water area (sq ft)N/A - Sidewalk (sq ft)2,850 sfTotal drainage area (sq ft)174,240 sf - Roof (sq ft)47,208 sfBUA associated with existing development (sq ft) N/A - Roadway (sq ft)8,382 sfProposed new BUA (sq ft)83,635 (Design) - Other, please specify in the comment box below (sq ft) N/APercent BUA of drainage area 48.0% (Design)Total BUA (sq ft)58,440 sfDesign rainfall depth (in)1.0 inMinimum volume required (cu ft) 6,999 cfDesign volume of SCM (cu ft)6,999 cf#1 Is the SCM sized to treat the SW from all surfaces at build-out? Yes#7 If applicable, with the SCM be cleaned out after construction?Yes#2 Is the SCM located on or near contaminated soils? No#8 Does the mainetenance access comply with General MDC (8)?Yes#3 What are the side slopes of the SCM (H:V)? 3:1#9 Does the drainage easement comply with General MDC (9)?Yes#3 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No#10 If the SCM is on a single family lot, does the plat comply with General MDC (10)?Yes#4 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes#11 Is there an O&M Agreement that complies with General MDC (11)?Yes#5 Is there a a bypass for flows in excess of the design flow? No#12 Is there an O&M Plan that complies with General MDC (12)?Yes#6 What is the method for dewatering the SCM for maintenance?Drawdown Orifice#13 Was the SCM designed by an NC licensed professional?Yes#1 SHWT elevation (fmsl)708.71 ft #3 Volume of stormwater from drainage area during design storm (cubic feet) 19,009 cf#1 Type of sand filter (open or closed) Open #3 Total volume that can be stored above the sediment and sand chambers (cubic feet) 23,619 cf#1 If closed, describe if the filter will be pre-cast or pour-in-place: #3 Is this sand filter designed to attenuate peak flows? Yes#3 Elevation of the bypass device (fmsl) N/A#1 If closed, top of grate elevation (fmsl) N/A#2 Volume that can be retained in the sediment chamber (cubic feet)40,700 cf#2 Will there be a permanent pool in the sediment chamber? No#2 Bottom of the sediment chamber (fmsl)724.5 ft#4 Ponding depth from the top of the sand to the bypass device (ft) N/A#2 Area of the sediment chamber (square feet)10,300 sf#2 Physical depth of the sediment chamber (inches)72 in#2 Ponding depth in the sediment chamber, above any permanent pool (inches)60 in#2 Elevation of top of weir between chambers (fmsl)726 ft#2 Volume that can be retained in the sand chamber (cubic feet) 6,999 cf#2 Bottom of the sand chamber (fmsl) 720.5 ft #7 Depth above underdrain pipe (inches) 33 in#2 Area of the sand chamber (square feet)700 sf#8 Will the media be maintained to drain at least two inches per hour at the sand surface? Yes#2 Physical depth of the sand chamber (inches)30 in #9 Is at least one clean-out pipe provided at the low point of each underdrain line? Yes#2 Ponding depth in the sand chamber, above any permanent pool (inches)24 in#9 Will clean-out pipes be capped? YesStormwater program(s) that apply (please specify):Stormwater Detention Control 2 year ans 10 year storm events, Water Quality design to treat 100 % of the first inch of runoff.GENERAL MDC FROM 02H .1050SAND FILTER MDC FROM 02H .1056N/ABreak down of BUA in the drainage area (both new and existing):COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAMTHE DRAINAGE AREAASTM C-33 MEDIUM AGGREGATE CONC. SANDADDITIONAL INFORMATIONPlease use this space to provide any additional information about this sand filter that you think is relevant to the review:#3 Describe the bypass device:N/A#5 Describe the mechanism for distributing flow over the sand surface:N/A#6 Sand specification for sand chamber Sand Filter39:32 AM 8/24/2018
DRY POND1Drainage area number5Total coastal wetlands area (sq ft)N/A - Parking / driveway (sq ft)Total surface water area (sq ft)N/A - Sidewalk (sq ft)3,700 sfTotal drainage area (sq ft)261,360 sf - Roof (sq ft)0 sfBUA associated with existing development (sq ft)30,492 sf - Roadway (sq ft)38,300 sfProposed new BUA (sq ft)42,000 sf - Other, please specify in the comment box below (sq ft) Percent BUA of drainage area33.3%Total BUA (sq ft)72,492 sfDesign rainfall depth (in)0 inMinimum volume required (cu ft)0 cfDesign volume of SCM (cu ft)20,257 cf#1 Is the SCM sized to treat the SW from all surfaces at build-out?No#7 If applicable, with the SCM be cleaned out after construction?Yes#2 Is the SCM located on or near contaminated soils?No#8 Does the mainetenance access comply with General MDC (8)?Yes#3 What are the side slopes of the SCM (H:V)?3 : 1#9 Does the drainage easement comply with General MDC (9)?Yes#3 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No#10 If the SCM is on a single family lot, does the plat comply with General MDC (10)?No#4 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)?Yes#11 Is there an O&M Agreement that complies with General MDC (11)?Yes#5 Is there a a bypass for flows in excess of the design flow?No#12 Is there an O&M Plan that complies with General MDC (12)?Yes#6 What is the method for dewatering the SCM for maintenance?Drawdown Orifice#13 Was the SCM designed by an NC licensed professional?Yes#1 SHWT elevation (fmsl)#1 Elevation of the bottom of the dry pond (fmsl)753.0 ft#1 Distance from bottom to SHWT (feet)#6 Size of drawdown orifice (in)1.5 in#2 Elevation of the temporary pool during the design storm (feet)758.08 ft #6 Drawdown time for the temporary pool (hours)52 hrs#2 Ponding depth of the design storm (feet)5.08 ft #7 Does the pond minimize impacts to the receiving channel from the 1-yr, 24-hr storm?Yes#3 Will the dry pond be uniformly graded to flow toward the outlet?Yes#8 Is there a small permantent pool near the orifice to prevent clogging?No#3 Is a low flow channel being provided?No#4 Are the inlet(s) and outlet located in a manner that avoids short-circuiting?Yes#9 Are the dam and embankment planted in non-clumping turf grass?No#9 Species of turf that will be used on the dam and embankmentN/A#9 Will trees and shrubs be prevented from growing on the dam and embankment?NoDRY POND MDC FROM 02H .1062#5 Describe the pretreatment that will be provided for the dry pond:Proposed riprap apron at 5-105B. #8 Describe how the outlet will be designed to prevent clogging:Proposed riprap apron at 5-105B and trash rack at orifice.#4 Describe any measures, such as berms or baffles, that will be taken to increase the flow path:Village at Granite Quarry - Phase 1GENERAL MDC FROM 02H .1050Break down of BUA in the drainage area (both new and existing):COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAMStormwater program(s) that apply (please specify):Stormwater Detention Control 2 year and 10 year storm events. Water Quality is to be treated in the future commerical and muilti-family development permitting process.Proposed riprap apron at 5-105B.ADDITIONAL INFORMATIONPlease use this space to provide any additional information about this dry pond that you think is relevant to the review:THE DRAINAGE AREADry Pond19:32 AM 8/24/2018BMP #6