dma design workbook instructions - salinas, california...cell a2. warning: we know that when dma...

DMA Design Workbook InstructionsNote: This workbook does not take the place of good engineering judgment. Engineering judgment should be used when designing BMPs to meet the SWDS requirements.

Note: RBF Consulting, A Company of the Michael Baker Corporation, does not guaranty that the sizing calculations are correct. Users are encouraged to verify results and to provide the City of Salinas and RBF at hoslick@rbf.com with feedback to correct errors and/or make improvements. Consider this tool to be a "beta" version

The purpose of this workbook is to assist project applicants for new and redevelopment projects in appropriately sizing BMPs to meet requirements set forth by the City of Salinas and the Central Coast Regional Water Quality Board. This spreadsheet workbook is constructed to serve as a tool to determine the requirement set a project is subject to and to design Best Management Practices (BMPs) to meet the applicable stormwater requirements. Included in this workbook are the summary sheet, threshold determination process spreadsheet and worksheets for bioretention design by Drainage Management Area (DMA). All projects are required to submit the Threshold Determination Spreadsheet with their conceptual stormwater control plan. For projects subject to Requirements 3 4 or 5 the entire workbook is to be turned in with the Stormwater Control Plan

Most user populated data is contained within the Threshold Determination Process and DMAs worksheets. User populated cells have borders and cells that are not greyed out. The greyed out cells are populated with data generated using the user populated data When an applicant fills out the workbook, the applicant should be sure to populate the cells in the Threshold Determination Process Spreadsheet in addition to the appropriate number of DMA spreadsheets for your project. Additional DMA worksheets can be added. If additional DMAs are required, please copy the last DMA tab, rename it to the same naming scheme “DMA #” and copy the appropriate cells, starting in column N, on the summary sheet to include the additional DMAs in the summary page. Remember to revise the new DMA sheet cell A2. Warning: We know that when DMA worksheets are copied that Excel takes an extended period of time to process the additional sheets Please be patient with Excel! If you encounter problems copying worksheets

Threshold Determination ProcessThe Threshold Determination Spreadsheet includes fields to categorize pervious and impervious features beyond that necessary to determine requirement applicability to promote identification of potential opportunities to increase the effective pervious area and to aid in project review. The applicant has the option to lump areas into the “All or Other” category, with the exception of turf areas, for cases where a more detailed breakdown would require extensive effort without potential benefit. This sheet is to be used to determine the appropriate SWDS requirement set for the proposed project

DMA WorksheetsEach DMA has a dedicated worksheet for BMP design purposes. In each DMA worksheet, be sure to input the appropriate infiltration rate. Each DMA workbook has the same base calculations. The workbooks are capable of four different treatment types or configurations: flow based treatment, volume based treatment, flow based pre treatment and self treating This workbook contains both pull-down menus and cells to be populated. The pull-down menus are included to aid in designing appropriate BMPs for each DMA. This workbook also allows the user to have the workbook automatically size and locate the orifice, notch base and top of riser. If the BMP is not being designed for Peak Management, be sure to select "No" in response to the question. The BMP will then be sized for the required volume at the overflow and the specific overflow configuration will not be specified

For the "Flow Based Pretreatment" Option, both the flow-based and volume based portions of the spreadsheet are active to evaluate configurations that use pretreatment upstream from infiltration systems.

For volume based treatment, the spreadsheet methodology is based on the BMPs full area residing at the BMP’s bottom elevation. The worksheets are not set up to design an infiltration basin where the infiltration area

When using the workbook, it is recommended that the Automatic calculations be turned off, in the Calculation Options under the Formulas tab, and manual calculations are selected instead. When a sample BMP has been designed, select the “Calculate Now” in the Formulas tab to make the Excel process more efficient.

Salinas Stormwater Development StandardsPlease see the instructions tab before using this Workbook.Project Name:Number of Drainage Management Areas: 0SWDS Requirement Set Project Site Area 0Total Accounted for Area 0Percentage of Total Site Unaccounted For #DIV/0!Percentage of Pervious Area Unaccounted For #DIV/0!

RequiredImpervious Area for Treatment Design None specifiedImpervious Area for Peak Management NoneImpervious Area for Runoff Reduction None

Land Cover AreaImpervious areas including roofs, pavements and areas with impermeable barriers 0BMPS (to account for directly incident rainfall) 0Crushed aggregate 0Sod and areas with non-amended hydrologic soil group D soils 0Other previous area 0

Total 0

Provided000

C-Value CA

1 01 0

0.35 00.1 0

Treatment TypeArea Treated (ft2)

Is this BMP being designed for Peak Management?

Treatment Design Impervious AreaPeak Management Impervious Area

Runoff Reduction Impervious Area

Cell/Sheet Reference DMA 1 DMA 2 DMA 3

B11 0 0 0B14 0 0 0B16 0 0 0B17 0 0 0B19 0 0 0

B5 0 Volume Based 0B20 0 0 0B27 0 0 0

0 0 0 0 0 0

DMA 4 DMA 50 00 00 00 00 0

0 00 00 0

Threshold Determination Process SpreadsheetProject Name:

Street address:

APN: Project Type:

Project Site Area: ft2

Pre-Project Impervious Area: ft2

Unchanging Impervious Area: ft2

Post-Project Impervious Area: - ft2

Unchanging Pervious Area: ft2

Note: Applicant may use the 'All' category or provide details, except 'Turf' must be listed separately.Impervious Area

New ReplacedBuilding Footprint: ft2 ft2

Parking: ft2 ft2

Driveways: ft2 ft2

Patios: ft2 ft2

Sidewalks: ft2 ft2

All or Other: ft2 ft2

Total: - ft2 - ft2

Pervious AreaNew Replaced

Turf: ft2

Landscaping: ft2 ft2

Parking: ft2 ft2

Driveways: ft2 ft2

Patios: ft2 ft2

Sidewalks: ft2 ft2

All or Other, except Turf: ft2 ft2

Total: - - ft2

Total New and Replaced Pervious Area: - ft2

ConclusionIs the project in an Urban Sustainability Area? No

Is there existing detention on the site? No

Applicable Requirement:

Impervious Area for Treatment Design: ft2None specified

New impervious area i impervious area place existing pervious area replaced impervious a where existing imperv is modified.

New pervious area is p area placed on existing impervious area and re pervious area is where pervious area is modif

Total New and Replaced Impervious Area:

Commercial

Impervious Area for Peak Management: ft2

Impervious Area for Runoff Reduction: ft2

See Section 4 for calculation procedures- - -

Land disturbance estimate: - ft2

Area check, set F11+E24+C37-C11=0:Area check, set C9-C11-E37-C24≥0:

Area check, set C9-C13-E39≥0:

is d on

and rea is

vious area

pervious g

eplaced e existing fied.

Salinas Stormwater Development StandardsDrainage Management Area 1Project Name:SWDS Requirement Set Treatment TypeBMP Tributary Area 0 ft2

Surface Area within BMP 0 ft2

Design Infiltration Rate 0.3 in/hr (enter "infeasible" or value)

Land Cover Area C-Value CA

Crushed aggregate 0 0.4 0

Other previous area 0 0.1 00 0.00

#DIV/0!

For Volume Based TreatmentIs this BMP being designed for Peak Management?BMP type

Sod and areas with non-amended hydrologic soil group D soils 0 0.35 0

Impervious areas including roofs (including green roofs), pavements and areas with impermeable barriers 0 1 0BMPS (to account for directly incident rainfall) (exclusing green roofs) 0 1 0

Drawdown time (max to orifice) #VALUE! hoursOrifice diameter (manual step for Requirement 3) 0.244 inches Push -->

Location ofOrifice diameter #VALUE! inches Notch BaseOrifice invert #VALUE! ft Top of RiserOrifice centerline #VALUE! ft 100-year Storage Elev.Orifice coefficient 0.6Notch Width #VALUE! in Storage RequiredWeir Length at Top of Riser #VALUE! ft Storage ProvidedWeir coefficient 3

ft (elevation) ft (above bottom)Top of storage 1

1 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.00

Note: For ease of use, turn Calculation Options to Manual when inputting stage-storage relationship information. Select Calculate Now from the Formulas tab to evaluate specified stage-storage relationship. Two areas can be used to evaluate slope transitions based on top and bottom.

1 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.00

For Flow Based TreatmentFlow Based Treatment BMP Type

BMP Tributary Area 0.00 ft2

Water Quality Flow Rate (WQF) 0.000 cfs

#VALUE! ft#VALUE! ft #VALUE! ft

FALSE ft3

0.00 ft3

ft2 (area in plan) Void Ratio ft2 (area in plan) Void RatioArea 1 Area 2

For Projects Subject to Require Infiltration rate:85th percentile runoff:Infiltration only drawdown:Is underdrain required?Volume below orifice:Above orifice drawdown:Minimum orifice size:Can runoff from the 85th percen If infiltration is feasible, then the If infiltration within 24 hours is n For this DMA

For Projects Subject to Require Unit Sizing Approach

Design Infiltration Rate (in/hr)

For this DMA

Effective (Vol)Surface Area Volumeft2 ft3

1 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.00

1 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.00

MAX Volume 0.00 MAX Surface Area

ment 30 cfs

0.00 ft3

#DIV/0! hoursYes

#DIV/0!#VALUE! inches

ntile storm event be disposed of via infiltration in 24 hours? #DIV/0! e volume required is equal to 0.65 inches times the triburary area. not feasible, then the volume is equal to 0.98 inches times the tributary area.

Required Capture Volume #DIV/0! ft3

ment 4

SCM Area (acres per equivalent impervious acre)

Unit Storage (acre-feet per equivalent impervious

Unit Storage at Notch Base (acre-feet/acre)

Unit Storage at Top of Riser (acre-ft/acre)

Unit Storage beneath Orifice (acre-feet per equivalent

impervious acre)

0.1 0.159 0.117 0.149 0.074ft2/ft2 ft3/ft2 ft3/ft2 ft3/ft2 ft3/ft2

0.00 0.00 0.00 0.00 0.00

TotalSurface Area lookup index Elevation Cumulative volumeft2

0 1 0.00 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.00

Check for area constant or increasing

0 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.000 0 0 #N/A 0.00

0.30.3

Percentage of 95th

Percentile Runoff Volume below Orifice

Percentage of Flow Infiltrated (from 30-yr

analysis)

Unit Orifice Flow at Notch Height (cfs/acre)

Unit Flow at Top of Riser minus Orifice Flow (cfs/acre)

100-year Unit Flow Rate (cfs-

101 98.5 0.006 0.136 0.376cfs cfs cfs

0.000 0.000 0.000

0.00 0.000.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A

0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A0.00 #N/A

0.1 0.1

orificewater surface average head

50 0.0049 0.00 #VALUE!48 0.00 #VALUE!47 0.00 #VALUE!46 0.00 #VALUE!45 0.00 #VALUE!

44 0.00 #VALUE!43 0.00 #VALUE!42 0.00 #VALUE!41 0.00 #VALUE!40 0.00 #VALUE!39 0.00 #VALUE!38 0.00 #VALUE!37 0.00 #VALUE!36 0.00 #VALUE!35 0.00 #VALUE!34 0.00 #VALUE!33 0.00 #VALUE!32 0.00 #VALUE!31 0.00 #VALUE!30 0.00 #VALUE!29 0.00 #VALUE!28 0.00 #VALUE!27 0.00 #VALUE!26 0.00 #VALUE!25 0.00 #VALUE!24 0.00 #VALUE!23 0.00 #VALUE!22 0.00 #VALUE!21 0.00 #VALUE!20 0.00 #VALUE!19 0.00 #VALUE!18 0.00 #VALUE!17 0.00 #VALUE!16 0.00 #VALUE!15 0.00 #VALUE!14 0.00 #VALUE!13 0.00 #VALUE!12 0.00 #VALUE!11 0.00 #VALUE!

10 0.00 #VALUE!9 0.00 #VALUE!8 0.00 #VALUE!7 0.00 #VALUE!6 0.00 #VALUE!5 0.00 #VALUE!4 0.00 #VALUE!3 0.00 #VALUE!2 0.00 #VALUE!1 0.00 #VALUE!0 0.00 #VALUE!

Drawdown time Storage (ft^3) Incremental volume Orifice Discharge (cfs) Infiltration Discharge (cfs)#VALUE! #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000

#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000

#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000#VALUE! #VALUE! #VALUE! #VALUE! 0.000000000

TotalWeir Discharge (cfs) Notch Discharge (cfs) discharge (cfs) time (hrs) storage

#VALUE! #VALUE! #VALUE! #VALUE! 1 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 2 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 3 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 4 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 5 #VALUE!

#VALUE! #VALUE! #VALUE! #VALUE! 6 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 7 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 8 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 9 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 10 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 11 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 12 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 13 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 14 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 15 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 16 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 17 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 18 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 19 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 20 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 21 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 22 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 23 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 24 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 25 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 26 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 27 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 28 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 29 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 30 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 31 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 32 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 33 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 34 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 35 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 36 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 37 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 38 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 39 #VALUE!

#VALUE! #VALUE! #VALUE! #VALUE! 40 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 41 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 42 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 43 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 44 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 45 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 46 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 47 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 48 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 49 #VALUE!#VALUE! #VALUE! #VALUE! #VALUE! 50 #VALUE!

Drawdown Time #VALUE! This is total drawdown

water surface elevation storage

-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!

-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!

-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!-0.0000001 #VALUE!

time, including surface storage, and subsurface storage above and below any orifice

Salinas Stormwater Development StandardsDrainage Management Area 2Project Name:SWDS Requirement Set Treatment Type Volume BasedBMP Tributary Area 0 ft2

#DIV/0!

1 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.00

1 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.00

FALSE ft3

0.00 ft3

For this DMA

1 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.00

1 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.00

ment 30 cfs

0.00 ft3

#DIV/0! hoursYes

ment 4

impervious acre)

0.00 0.00 0.00 0.00 0.00

0.30.3

Percentage of 95th

analysis)

101 98.5 0.006 0.136 0.376cfs cfs cfs

0.000 0.000 0.000

0.1 0.1

#DIV/0!

1 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.00

1 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.00

FALSE ft3

0.00 ft3

For this DMA

1 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.00

1 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.00

ment 30 cfs

0.00 ft3

#DIV/0! hoursYes

ment 4

impervious acre)

0.00 0.00 0.00 0.00 0.00

0.30.3

Percentage of 95th

analysis)

101 98.5 0.006 0.136 0.376cfs cfs cfs

0.000 0.000 0.000

0.1 0.1

#DIV/0!

1 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.00

1 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.00

For Flow Based TreatmentFlow Based Treatment BMP Type Vegetated SwaleSide Slope H:1V Error - Too SteepBottom Width (b) ftBottom Vegetation GrassLongitudinal Slope ft/ft Error - Swale length is to Length ft Design Vegetation Heigh Design Vegetation Height inSwale Depth in

Roughness Coefficient (n) 0.25

Water Quality Flow Rate (WQF) 0.000 cfsNormal Depth #VALUE! ft #VALUE!Area #VALUE! ft2Velocity #VALUE! ft/sec

Residence Time #VALUE! minutes #VALUE!

Install a minimum 4-inch diameter underdrain.

FALSE ft3

0.00 ft3

ft2 (area in plan) Void Ratio ft2 (area in plan) Void Ratio

Area 1 Area 2

For Projects Subject to Require 0 Infiltration rate:

85th percentile runoff:Infiltration only drawdown:Is underdrain required?Volume below orifice:

oo short Above orifice drawdown: ht is too short Minimum orifice size:

Can runoff from the 85th percen If infiltration is feasible, then the If infiltration within 24 hours is n For this DMA

For this DMA

1 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.00

1 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.00

ment 30 cfs

0.00 ft3

#DIV/0! hoursYes

ment 4

impervious acre)

0.00 0.00 0.00 0.00 0.00

0.30.3

Percentage of 95th

analysis)

101 98.5 0.006 0.136 0.376cfs cfs cfs

0.000 0.000 0.000

0.1 0.1

Design Infiltration Rate in/hr (enter "infeasible" or value)

Crushed aggregate 0.4 0

Other previous area 0.1 00 0.00

#DIV/0!

Sod and areas with non-amended hydrologic soil group D soils 0.35 0

Impervious areas including roofs (including green roofs), pavements and areas with impermeable barriers 1 0BMPS (to account for directly incident rainfall) (exclusing green roofs) 1 0

1 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.00

1 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.00

FALSE ft3

0.00 ft3

For this DMA

1 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.00

1 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.001 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.00

ment 30 cfs

0.00 ft3

#DIV/0! hoursYes

ment 4

impervious acre)

0.1 0.185 0.131 0.167 0ft2/ft2 ft3/ft2 ft3/ft2 ft3/ft2 ft3/ft2

0.00 0.00 0.00 0.00 0.00

Percentage of 95th

analysis)

0 0 0.01 0.212 0.506cfs cfs cfs

0.000 0.000 0.000

0.1 0.1

Select One Flow Based Commercial GrassRequirement 3 Volume Based Industrial Mixed Vegetation and RocksRequirement 4 Flow Based Pre-TreatmMulti-unit Residential

Self Treating Mixed-use Sheet FlowUntreated Detached Single Family Concentrated Flow Control

Scenario Soil Type

Design Infiltratio

n Rate (in/hr)

SCM Area (acres per equivalen

t impervious acre)

Unit Storage

(acre-feet per

equivalent

impervious acre)

Unit Storage at Notch

Base (acre-

ft/acre)

Unit Storage

at Top of Riser (acre-

ft/acre)

impervious acre)

1 B 1 0.062 0.122 0.101 0.116 No orifice2 B 0.5 0.077 0.15 0.124 0.142 No orifice4 B 0.3 0.1 0.159 0.117 0.149 0.0745 C/D 0.1 0.1 0.165 0.117 0.149 0.0746 C/D 0.02 0.1 0.18 0.126 0.162 0.0387 C/D 0 0.1 0.185 0.131 0.167 0

Yes Vegetated Swale Infiltration Trench Biofiltration No Vegetated Filter Strip Infiltration Basin Pervious Pa

Green Roof Dry Well Undergrou Proprietary System Vegetated SwaleBiofilter or Planter

Percentage of 95th

Percentage of Flow Infiltrated (from 30-

yr analysis)

Unit Orifice Flow at Notch Height

(cfs/acre)

Unit Flow at Top of

Riser minus Orifice Flow

(cfs/acre)

100-year Unit Flow Rate (cfs-acre)

138 99.8 0 0.095 0.221169 99.8 0 0.115 0.314101 98.5 0.006 0.136 0.376101 91.8 0.006 0.161 0.52452 46.6 0.01 0.232 0.6050 0 0.01 0.212 0.506

n Basin avement

nd Storage

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