Spreadsheet: 0d565cdd-92ae-42e9-8957-a2b64a24b951
Sheet: Sheet1

Red triangles at the upper right hand corner indicate design comments | Unnamed: 1 | Unnamed: 2 | Unnamed: 3 | Unnamed: 4
Please complete the yellow shaded items.
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
SAND FILTER SUPPLEMENT
This form must be filled out on line, printed and submitted with all of the required information.
Make sure to also fill out and submit the Required Items Checklist (Section III) and the I&M Agreement (Section IV)
I.  PROJECT INFORMATION
Project name
Contact name
Phone number
Date
Drainage area number
II.  DESIGN INFORMATION
Site Characteristics
Drainage area (AD) |  | ft2 | 1
Drainage area (AD) |  | acres | 0
Impervious area |  | ft2
Impervious area | 0 | acres
% Impervious (IA) |  | %
Design rainfall depth (RD) |  | in
Peak Flow Calculations
1-yr, 24-hr runoff depth |  | in
1-yr, 24-hr intensity |  | in/hr
Pre-development 1-yr, 24-hr runoff |  | ft3/sec
Post-development 1-yr, 24-hr runoff |  | ft3/sec
Pre/Post 1-yr, 24-hr peak control |  | ft3/sec
Large Design Storm
Design Storm to control |  | yr
 |  | hr
Rainfall intensity, large design storm | 0 | in/hr
Peak flow, large design storm |  | ft3/sec
Length of overflow weir |  | ft
Storage Volume
Design volume (WQV) |  | ft3
Adjusted water quality volume (WQVAdj) | 0 | ft3
Volume contained in the sedimentation basin and on top of the sand filter |  | ft3
Top of sand filter/grate elevation |  | ft amsl
Weir elevation (between chambers) |  | ft amsl
Maximum head on the sedimentation basin and sand filter (hMaxFilter) |  | ft
Average head on the sedimentation basin and sand filter (hA) |  | ft | 0
Runoff Coefficient (RV) |  | (unitless)
Type of Sand Filter
Open sand filter? |  | Y or N
SHWT elevation |  | ft amsl
Bottom of the sand filter elevation |  | ft amsl
Clearance  (dSHWT)
Closed/pre-cast sand filter? |  | Y or N
SHWT elevation |  | ft amsl
Bottom of the sand filter elevation |  | ft amsl
Clearance  (dSHWT)
If this is a closed, underground closed sand filter:  The clearance between the surface of the sand filter and the bottom of the roof of the underground structure (dSpace) |  | ft
Sedimentation Basin
Surface area of sedimentation basin (AS) |  | ft2
Sedimentation basin/chamber depth |  | ft
Sand Filter
Surface area of sand filter (AF) |  | ft2
Top of sand media filter bed elevation |  | ft amsl
Bottom of sand media filter bed/drain elevation |  | ft amsl
Depth of the sand media filter bed (dF) | 0 | ft
Coefficient of permeability for the sand filter (k) |  | (ft/day)
Outlet diameter |  | in
Outlet discharge/flowrate |  | ft3/sec
Time to drain the sand filter (t) |  | hours
Time to drain the sand filter (t) | 0 | days
Additional Information
Does volume in excess of the design volume bypass the sand filter? |  | Y or N
Is an off-line flow-splitting device used? |  | Y or N
If draining to SA waters: Does volume in excess of the design volume flow evenly distributed through a vegetated filter? |  | Y or N
What is the length of the vegetated filter? |  | ft
Does the design use a level spreader to evenly distribute flow? |  | Y or N
Is the BMP located at least 30ft from surface waters (50ft if SA waters)? |  | Y or N
If not a closed bottom, is BMP located at least 100ft from water supply wells? |  | Y or N
Are the vegetated side slopes equal to or less than 3:1 |  | Y or N
Is the BMP located in a recorded drainage easement with a  recorded access easement to a public Right of Way (ROW)? |  | Y or N
What is the width of the sedimentation chamber/forebay (WSed)? |  | ft
What is the depth of sand over the outlet pipe (dpipe)? |  | ft