SW5241101_Supplement-EZ Form_20241119 (2)

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
SNAP v4.2.0
Project Area and Offsite Land Cover Characteristics Precipitation Louisburg
Station:
Copy caste VALUES ONLY for Best Results Click here to scroll down to error messages on this sheet.
PROJECT AREA LAND COVERS TN EMC (mg/L) TP EMC (mg/L) Pre-Project Area (ft2) Post-Project Area (ft2) Change pre-to-post(ft2)
Roof 1.18 0.11 i 145,425 145,425
Roadway 1.64 0.34 113,600 113,600
Parking/Driveway/Sidewalk 1.42 0.18 21,500 21,500
Protected Forest 0.97 0.03 0
Managed Pervious/Landscaping 2.48 1.07 1,773,763 1,468,063 -305,700
Offsite or Existing Roof 1.18 _ 0.11 0
Offsite or Existing Roadway 1.64 0.34 0
Offsite or Existing Parking/Driveway/Sidem 1.42 0.18 0
Offsite Protected Forest 0.97 0.03 0
Offsite Managed Pervious 2.48 1.07 0
CUSTOM LAND COVER 1 0
CUSTOM LAND COVER 2 _ 0
CUSTOM LAND COVER 3 0
LAND TAKEN UP BY SCM 1.18 0.11 25,175 25,175
Total (Regulated & UnReg) Area 1,773,763.00 1,773,763.00
Project(Regulated)Area 1,773,763.00 1,773,763.00

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Project Information Complete this sheet if required by your reviewing authority.
Contact them for any questions. Grey boxes/text are optional.
SNAPv4.2.0 LOCATION
r-
�Project Name(optional): Forest Hills Parcel ID(optional):
Submission Date(optional): date Nutrient Management Watershed: Tar_Pamlico menu
Local Jurisdiction/Reviewing Agency: State/Federal menu Subwatershed: Upper_Tar_River menu
Project Latitude Coordinates(optional): N Phosphorus Delivery Zone: Tar- Upper 03020101 menu
Project Longitude Coordinates(optional): W Nitrogen Delivery Zone: Tar- Upper 03020101 menu
PROJECT DETAILS
Development Land Use Type: Single Family Residential menu Disturbed Area: 1,325,000 ft2
Part of Common Development Plan? no yin Project Activity: New Development menu
Designated Downtown Area? no yin Project Drains to SA Waters? no yin
Public Linear Road/Sidewalk Project? no yin Pre-Project Land Use: fallow/open menu
Project Owner Type: Private menu Project Description(optional):
STORM WATER DETAILS
(Falls ONLY)Onsite Reduction%Req. % Project Uses LID/Runoff Volume Match? yin
Existing BUA/Development Onsite? yin Local Gov't nutrient req's same as State? yin
Local Gov't cutoff date for Existing BUA: date Project Drains to Regional SCM? yin
Nitrogen Export Rate Target: 2.20 Ib/ac/yr Total Nitrogen Offset Credits Needed: Ib/yr
Phosphorus Export Rate Target: 0.80 Ib/ac/yr Total Phosphorus Offset Credits Needed: Ib/yr

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Nutrient Management Strategy Watershed - Nutrient Offset Credit Reporting Form
SNAP v4.2.0
Please complete and submit the following information to the local government permitting your development project
to characterize it and assess the need to purchase nutrient offset credits. Contact and rule implementation
information can be found online at:
http://deq.nc.gov/about/divisions/water-resources/plan ni ng/nonpoint-source-management/nutrient-offset-information
PROJECT INFORMATION
Applicant Name:
Project Name: Forest Hills
Project Address:
Date: (mm/dd/yyyy) Development Land Use Type: Single Family Residential
County: Project Activity Type: New Development
Project Area (sqft): 1,773,763 I Project Latitude:' 0.000000
Post-Project Built-Upon Area%: 15.82% Project Longitude: 0.000000
WATERSHED INFORMATION
Nutrient Management Watershed: Tar Pamlico N Target Export Rate(Ib/ac/yr): 2.20
Subwatershed: Upper_Tar_River P Target Export Rate(Ib/ac/yr): 0.80
Nitrogen Delivery Zone: Tar-Upper 03020101 Nitrogen Delivery Factor: 100%
Phosphorus Delivery Zone: Tar-Upper 03020101 Phosphorus Delivery Factor: 100%
PERMANENT NUTRIENT OFFSET REQUEST
Post-Project Nitrogen Calculations -Projects with No Offsite or Built-Upon Area
(A) (B) (C) (D) (F) (G) (Where
Applicable)
TN Export TN Remaining TN Permanent Additional Total TN
TN Untreated TN Treated TN Delivery Offsets Permanent
Load(Ib/yr) Target Load Load(Ib/yr) Reduction Factor(%) Required Local Gov't Offsets to
(Ib/yr) Need(Ib/yr) (Ib/yr) Offsets(Ib/yr) Buy(Ib/yr)
124.1 89.6 67.3 0.0 100.0% 0.0 0.0 I
Post-Project Phosphorus Calculations -Projects with No Offsite or Built-Upon Area
(A) (B) (C) (D) (F) (G) (Where
Applicable)
TP Export TP Remaining TP Permanent Additional Total TP
TP Untreated TP Treated TP Delivery Offsets Permanent
Load(Ib/yr) Target Load Load(Ib/yr) Reduction Local Gov't
Factor(%) Required Offsets to
(Ib/yr) Need(lb/yr) (Ib/yr) Offsets(Ib/yr) Buy(Ib/yr)
29.2 32.6 11.8 0.0 100.0% 0.0 0.0
LOCAL GOVERNMENT AUTHORIZATION
Local Government Name:I
Staff Name: Phone:
Staff Email: Date:
Local Government Authorizing Signature:

SCM Characteristics
FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Stormwater Control Measure (SCM) Characteristics
Click here to go to
Copy & Paste VALUES ONLY for SCM101's Land Cover Data
SNAP v4.2.0
Best Results
` Catchment ID 1 1 1
Drains to Drains to
11= >
SCM ID 101 102 103
Type of SCM Wet Pond
Hydrologic soil group at SCM location C
■ SCM Description Wet pond
I. Design Storm Size(inches/24hrs) 1.00
■ Percent of Full Size I 100%
■ %Annual Effluent 72% 0% 0%
Annual Overflow 16% 0% 0%
■ %Annual ET/Infiltrated 13% 0% 0%
■ Custom%Annual Effluent
IIICustom%Annual Overflow
[ Custom%Annual ET/Infiltrated I
111 SCM Effluent TP EMC(mg/L) 0.13 0.00 0.00
■ SCM Effluent TN EMC(mg/L) 0.86 0.00 0.00
I. Custom Effluent TP EMC
■ Custom Effluent TN EMC
■ SCM Land Cover TP EMC(mg/L) 0.11 0.00 0.00
ISCM Land Cover TN EMC(mg/L) 1.18 0.00 0.00
IThis SCM Drains to Numbered SCM 0 0 0
Catchment Routing Catchments Draining to atchments Draining to atchments Draining to
SCM 101 SCM 102 SCM 103
II Catchment 1
Catchment 2
Catchment 3
Catchment 4
Catchment 5
Catchment 6

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
SCM Characteristics
Error Check-Missing SCM Area:
Error Check-Min/Max Size:
Error Check-Hydrology:
IIII Error Check-Missing SCM Info:
Error Check-Drainage Data w/o SCM:
Error Checks-SCM Type:
SCM ID: 101 102 103
SCM Drainage Area Land Covers Area Draining Directly to Area Draining Directly to Area Draining Directly to
SCM 101 (ft2) SCM 102(ft2) SCM 103(ft2)
Roof 145,425
Roadway 113,600
Parking/Driveway/Sidewalk 21,500
Protected Forest
Managed Pervious/Landscaping 1,468,063
Offsite or Existing Roof
Offsite or Existing Roadway
Offsite or Existing Parking/Driveway/Sidewalk
Offsite Protected Forest
Offsite Managed Pervious
CUSTOM LAND COVER 1
CUSTOM LAND COVER 2
CUSTOM LAND COVER 3
LAND TAKEN UP BY SCM 25,175
TOTAL AREA DRAINING TO SCM (ft2): 1,773,763 0 0
ICATCHMENTAREA(ft2): 1,773,763

SCM Characteristics
FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Stormwater Control Measu
Click here to review Errors Click here to go to Click here to go back to the
Summary Data top
SNAP v4.2.0
IN Catchment ID 2 2 2
SCM ID 201 Drains to 202 Drains toIII 203
Type of SCM
' Hydrologic soil group at SCM location
116. SCM Description
111- Design Storm Size(inches/24hrs)
III Percent of Full Size I
Annual Effluent 0% 0% 0%
Annual Overflow 0% 0% 0%
M %Annual ET/Infiltrated ■ 0% 0% 0%
■ Custom%Annual Effluent
rCustom%Annual Overflow
I. Custom%Annual ET/Infiltrated
MI SCM Effluent TP EMC(mg/L) 0.00 0.00 0.00
■ SCM Effluent TN EMC(mg/L) 0.00 0.00 0.00
■ Custom Effluent TP EMC
■ Custom Effluent TN EMC
■ SCM Land Cover TP EMC(mg/L) 0.00 0.00 0.00
I- SCM Land Cover TN EMC(mg/L) 0.00 0.00 0.00
' This SCM Drains to Numbered SCM 0 0 0
111 Catchment Routing Catchments Draining to tchments Draining to tchments Draining to
SCM 201 SCM 202 SCM 203
Catchment 1
Catchment 2
Catchment 3
Catchment 4
Catchment 5
Catchment 6

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
SCM Characteristics
Error Check-Missing SCM Area:
Error Check-Min/Max Size:
Error Check-Hydrology:
Error Check-Missing SCM Info:
Error Check-Drainage Data w/o SCM:
Error Checks-SCM Type:
SCM ID: 201 202 203
7- SCM Drainage Area Land Covers Area Draining Directly to Area Draining Directly to Area Draining Directly to
SCM 201 (ft2) SCM 202 (ft2) SCM 203 (ft2)
Roof
Roadway
Parking/Driveway/Sidewalk
Protected Forest
Managed Pervious/Landscaping
Offsite or Existing Roof
Offsite or Existing Roadway
Offsite or Existing Parking/Driveway/Sidew
Offsite Protected Forest
Offsite Managed Pervious
CUSTOM LAND COVER 1
CUSTOM LAND COVER 2
CUSTOM LAND COVER 3
LAND TAKEN UP BY SCM
TOTAL AREA DRAINING TO SCM (ft2): 0 0 0
CATCHMENT AREA(ft2): 0

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
SCM Characteristics
Stormwater Control Measu
SNAP v4.2.0
IN Catchment ID 3 3 3
Drains to Drains to
III SCM ID 301 > 302 > 303
Type of SCM
' Hydrologic soil group at SCM location
L. SCM Description
111- Design Storm Size(inches/24hrs)
III Percent of Full Size I
Annual Effluent 0% 0% 0%
MP %Annual Overflow 0% 0% 0%
M %Annual ET/Infiltrated ■ 0% 0% 0%
■ Custom%Annual Effluent
rCustom%Annual Overflow
I. Custom%Annual ET/Infiltrated
MI SCM Effluent TP EMC(mg/L) 0.00 0.00 0.00
■ SCM Effluent TN EMC(mg/L) 0.00 0.00 0.00
■ Custom Effluent TP EMC
■ Custom Effluent TN EMC
■ SCM Land Cover TP EMC(mg/L) 0.00 0.00 0.00
I- SCM Land Cover TN EMC(mg/L) 0.00 0.00 0.00
' This SCM Drains to Numbered SCM 0 0 0
111 Catchment Routing Catchments Draining to tchments Draining to tchments Draining to
SCM 301 SCM 302 SCM 303
Catchment 1
Catchment 2
Catchment 3 AMIA AMIA
Catchment 4
Catchment 5
Catchment 6

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
SCM Characteristics
Error Check-Missing SCM Area:
Error Check-Min/Max Size:
Error Check-Hydrology:
Error Check-Missing SCM Info:
Error Check-Drainage Data w/o SCM:
Error Checks-SCM Type:
SCM ID: 301 302 303
7- SCM Drainage Area Land Covers Area Draining Directly to Area Draining Directly to Area Draining Directly to
SCM 301 (ft2) SCM 302 (ft2) SCM 303 (ft2)
Roof
Roadway
Parking/Driveway/Sidewalk
Protected Forest
Managed Pervious/Landscaping
Offsite or Existing Roof
Offsite or Existing Roadway
Offsite or Existing Parking/Driveway/Sidew
Offsite Protected Forest
Offsite Managed Pervious
CUSTOM LAND COVER 1
CUSTOM LAND COVER 2
CUSTOM LAND COVER 3
LAND TAKEN UP BY SCM
TOTAL AREA DRAINING TO SCM (ft2): 0 0 0
CATCHMENT AREA(ft2): 0

SCM Characteristics
FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Stormwater Control Measu
SNAP v4.2.0
IN Catchment ID 4 4 4
III SCM ID 401 Drains to 402 Drains to 403
Type of SCM
' Hydrologic soil group at SCM location
L. SCM Description
111- Design Storm Size(inches/24hrs)
III Percent of Full Size -
Annual Effluent 0% 0% 0%
MP %Annual Overflow 0% 0% 0%
M %Annual ET/Infiltrated ■ 0% 0% 0%
■ Custom%Annual Effluent
rCustom%Annual Overflow
I. Custom%Annual ET/Infiltrated
MI SCM Effluent TP EMC(mg/L) 0.00 0.00 0.00
■ SCM Effluent TN EMC(mg/L) 0.00 0.00 0.00
■ Custom Effluent TP EMC
■ Custom Effluent TN EMC
■ SCM Land Cover TP EMC(mg/L) 0.00 0.00 0.00
I- SCM Land Cover TN EMC(mg/L) 0.00 0.00 0.00
' This SCM Drains to Numbered SCM 0 0 0
111 Catchment Routing Catchments Draining to tchments Draining to tchments Draining to
SCM 401 • SCM 402 • SCM 403
Catchment 1
Catchment 2
Catchment 3
Catchment 4
Catchment 5
Catchment 6

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
SCM Characteristics
Error Check-Missing SCM Area:
Error Check-Min/Max Size:
Error Check-Hydrology:
Error Check-Missing SCM Info:
Error Check-Drainage Data w/o SCM:
Error Checks-SCM Type:
SCM ID: 401 402 403
7- SCM Drainage Area Land Covers Area Draining Directly to Area Draining Directly to Area Draining Directly to
SCM 401 (ft2) SCM 402 (ft2) SCM 403 (ft2)
Roof
Roadway
Parking/Driveway/Sidewalk
Protected Forest
Managed Pervious/Landscaping
Offsite or Existing Roof
Offsite or Existing Roadway
Offsite or Existing Parking/Driveway/Sidew
Offsite Protected Forest
Offsite Managed Pervious
CUSTOM LAND COVER 1
CUSTOM LAND COVER 2
CUSTOM LAND COVER 3
LAND TAKEN UP BY SCM
TOTAL AREA DRAINING TO SCM (ft2): 0 0 0
CATCHMENT AREA(ft2): 0

SCM Characteristics
FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Stormwater Control Measu
SNAP v4.2.0
IN Catchment ID 5 5 5
SCM I D 501 N.
502 Drains to Drains toIII V 503
Type of SCM
' Hydrologic soil group at SCM location
L. SCM Description
111- Design Storm Size(inches/24hrs)
III Percent of Full Size I I
Annual Effluent 0% 0% 0%
Annual Overflow 0% 0% 0%
M %Annual ET/Infiltrated ■ 0% 0% 0%
■ Custom%Annual Effluent
rCustom%Annual Overflow
I. Custom%Annual ET/Infiltrated
MI SCM Effluent TP EMC(mg/L) 0.00 0.00 0.00
■ SCM Effluent TN EMC(mg/L) 0.00 0.00 0.00
■ Custom Effluent TP EMC
■ Custom Effluent TN EMC
■ SCM Land Cover TP EMC(mg/L) 0.00 0.00 0.00
I- SCM Land Cover TN EMC(mg/L) 0.00 0.00 0.00
' This SCM Drains to Numbered SCM 0 0 0
111 Catchment Routing Catchments Draining to tchments Draining to tchments Draining to
SCM 501 • SCM 502 • SCM 503
Catchment 1
Catchment 2
Catchment 3
Catchment 4
Catchment 5
Catchment 6

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
SCM Characteristics
Error Check-Missing SCM Area:
Error Check-Min/Max Size:
Error Check-Hydrology:
Error Check-Missing SCM Info:
Error Check-Drainage Data w/o SCM:
Error Checks-SCM Type:
SCM ID: 501 502 503
7- SCM Drainage Area Land Covers Area Draining Directly to Area Draining Directly to Area Draining Directly to
SCM 501 (ft2) SCM 502 (ft2) SCM 503 (ft2)
Roof
Roadway
Parking/Driveway/Sidewalk
Protected Forest
Managed Pervious/Landscaping
Offsite or Existing Roof
Offsite or Existing Roadway
Offsite or Existing Parking/Driveway/Sidew
Offsite Protected Forest
Offsite Managed Pervious
CUSTOM LAND COVER 1
CUSTOM LAND COVER 2
CUSTOM LAND COVER 3
LAND TAKEN UP BY SCM
TOTAL AREA DRAINING TO SCM (ft2): 0 0 0
CATCHMENT AREA(ft2): 0

SCM Characteristics
FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Stormwater Control Measu
SNAP v4.2.0
IN Catchment ID 6 6 6
III Drains to Drains to
SCM ID 601 602 603
Type of SCM
' Hydrologic soil group at SCM location
116. SCM Description
111- Design Storm Size(inches/24hrs)
III Percent of Full Size L I
mi__ %Annual Effluent 0% 0% 0%
Annual Overflow1. 0% 0% 0%
M %Annual ET/Infiltrated 0% 0% 0%
■ Custom%Annual Effluent
rCustom%Annual Overflow i
I. Custom%Annual ET/Infiltrated
MI SCM Effluent TP EMC(mg/L) 0.00 0.00 0.00
■ SCM Effluent TN EMC(mg/L) 0.00 0.00 0.00
■ Custom Effluent TP EMC
■ Custom Effluent TN EMC
■ SCM Land Cover TP EMC(mg/L) 0.00 0.00 0.00
I- SCM Land Cover TN EMC(mg/L) 0.00 0.00 0.00
' This SCM Drains to Numbered SCM 0 0 0
111 Catchment Routing Catchments Draining to Catchments Drainaliatchments Draining to
SCM 601 SCM 602 SCM 603
Catchment 1
Catchment 2
Catchment 3
Catchment 4
Catchment 5
Catchment 6

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
SCM Characteristics
Error Check-Missing SCM Area:
Error Check-Min/Max Size:
Error Check-Hydrology:
Error Check-Missing SCM Info:
Error Check-Drainage Data w/o SCM:
Error Checks-SCM Type:
SCM ID: 601 602 603
7- SCM Drainage Area Land Covers Area Draining Directly to Area Draining Directly to Area Draining Directly to
SCM 601 (ft2) SCM 602 (ft2) SCM 603 (ft2)
Roof
Roadway
Parking/Driveway/Sidewalk
Protected Forest
Managed Pervious/Landscaping
Offsite or Existing Roof
Offsite or Existing Roadway
Offsite or Existing Parking/Driveway/Sidew
Offsite Protected Forest
Offsite Managed Pervious
CUSTOM LAND COVER 1
CUSTOM LAND COVER 2
CUSTOM LAND COVER 3
LAND TAKEN UP BY SCM
TOTAL AREA DRAINING TO SCM (ft2): 0 0 0
CATCHMENT AREA(ft2): 0

SCM Characteristics
FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Stormwater Control Measu
SNAP v4.2.0
IN Catchment ID II
SCM ID
Type of SCM
' Hydrologic soil group at SCM location
116. SCM Description
111- Design Storm Size(inches/24hrs)
Percent of Full Size
Annual Effluent
Annual Overflow
Annual ET/Infiltrated
■ Custom%Annual Effluent
rCustom%Annual Overflow
Custom%Annual ET/Infiltrated
MI SCM Effluent TP EMC(mg/L)
■ SCM Effluent TN EMC(mg/L)
■ Custom Effluent TP EMC
■ Custom Effluent TN EMC
■ SCM Land Cover TP EMC(mg/L)
SCM Land Cover TN EMC(mg/L)
' This SCM Drains to Numbered SCM
111 Catchment Routing
Catchment 1
Catchment 2
Catchment 3
Catchment 4
Catchment 5
Catchment 6

SCM Characteristics
FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Error Check-Missing SCM Area:
Error Check-Min/Max Size:
Error Check-Hydrology:
Error Check-Missing SCM Info:
Error Check-Drainage Data w/o SCM:
Error Checks-SCM Type:
7- SCM ID: I
Allowable Total Land Use
Total Land Use Area Post-Project Untreated
SCM Drainage Area Land Covers z Area to be Treated Based on Z
Treated By All SCMs (ft ) z Land Area (ft2)
Post-Project Areas(ft2)
Roof 145,425 145,425 0
Roadway _ 113,600 113,600 0
Parking/Driveway/Sidewalk 21,500 21,500 0
Protected Forest 0 0 0
Managed Pervious/Landscaping 1,468,063 1,468,063 0
Offsite or Existing Roof 0 0 0
Offsite or Existing Roadway 0 0 0
Offsite or Existing Parking/Driveway/Sidews 0 0 0
Offsite Protected Forest 0 0 0
Offsite Managed Pervious 0 0 0
CUSTOM LAND COVER 1 0 0 0
CUSTOM LAND COVER 2 0 0 _ 0
CUSTOM LAND COVER 3 0 0 0
LAND TAKEN UP BY SCM 25,175 25,175 0
TOTAL AREA DRAINING TO SCM (ft2): 1,773,763 1,773,763 0
CATCHMENT AREA(ft2):

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Nutrient Export Summary
Landcover a SCM Data Review
Errors/Advisories
Avg Annual precip (in) = 45.63
Total (Regulated +
1,773,763
Unregulated) Area (ft2) =
Project(Regulated)
1,773,763
Area (ft2)=
Net BUA(Project Area
2 280,525 Net BUA indicates new development or expansion.
BUA only ft ) =
Custom Landcovers are
present:
no
Total Nitrogen Export Target
89.58
Scaled to Project Area (Ib/yr):
Total Area Total Area Project Area
Project Area
(Onsite+ Post-Project Post-Project
Nutrient Export Summary Offsite) (Onsite Only) before before
Pre-Project
Pre-Project Treatment Treatment
Area (All Landcover Types) (acres) 40.7200 40.7200 40.7200 40.7200
Percent Built-Upon Area (BUA)(%) 0% 0% 16% 16%
Built-Upon Area (BUA) (sqft) 0 0 280,525 280,525
Annual Runoff Volume(ft3/yr) 303,513 303,513 1,249,384 1,249,384
Annual Runoff%Change 312% 312%
Total Runoff Change (cuft/yr) 945,871 945,871
!Total Nitrogen EMC(mg/L) 2.48 2.48 1.59 1.59
Total Nitrogen Load Leaving Site(Ib/yr) 47.00 47.00 124.11 I 124.11
Total Nitrogen Loading Rate(Ib/ac/yr) 1.15 1.15 3.05 3.05
Total Nitrogen%Change Pre-to-Post �____ \ 164% 164%
Total Nitrogen Change (Ib/yr) Pre-to-Post 1 77.10 77.10
Total Phosphorus EMC(mg/L) 1.07 1.07 0.37 0.37
Total Phosphorus Load Leaving Site(Ib/yr) 20.28 20.28 _ 29.25 j 29.25
Total Phosphorus Loading Rate(Ib/ac/yr) 0.50 0.50 0.72 0.72
Total Phosphorus%Change Pre-to-Post 44% 44%
Total Phosphorus Change(Ib/yr)Pre-to-Post 8.97 8.97

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
SCM/Catchment Summary
,
SCM ID and Type Volume TN Reduction TP Reduction TN Out TP Out
Reduction (%) (%) (%) (Ibs/ac/yr) (Ibs/ac/yr)
I
Catchment 1 12.66% 45.75% 59.63% 1.65 0.29 1
101:Wet Pond 12.66% 45.75% 59.63% 1.65 0.29
102:NA 0.00% 0.00% 0.00% 0.00 0.00
103:NA 0.00% 0.00% 0.00% 0.00 0.00
Catchment 2 0.00% 0.00% 0.00% 0.00 0.00
201:NA 0.00% 0.00% 0.00% 0.00 0.00
202:NA 0.00% 0.00% 0.00% 0.00 0.00
203:NA 0.00% 0.00% 0.00% 0.00 0.00
Catchment 3 0.00% 0.00% 0.00% 0.00 0.00
301:NA 0.00% 0.00% 0.00% 0.00 0.00
302:NA 0.00% 0.00% 0.00% 0.00 0.00
303:NA 0.00% 0.00% 0.00% 0.00 0.00
_ Catchment 4 0.00% 0.00% 0.00% 0.00 0.00
_401:NA 0.00% 0.00% 0.00% 0.00 0.00
402:NA 0.00% 0.00% 0.00% 0.00 0.00
403:NA 0.00% 0.00% 0.00% 0.00 0.00
Catchment 5 0.00% 0.00% 0.00% 0.00 0.00
501:NA 0.00% 0.00% 0.00% 0.00 0.00
502:NA 0.00% 0.00% 0.00% 0.00 0.00
503:NA 0.00% 0.00% 0.00% 0.00 0.00
_ Catchment 6 0.00% 0.00% 0.00% 0.00 0.00
601:NA 0.00% 0.00% 0.00% 0.00 0.00
602:NA 0.00% 0.00% 0.00% 0.00 0.00
603:NA 0.00% 0.00% 0.00% 0.00 0.00

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
SNAP v4.2.0
Errors/Advisories
SCM Area (ft2) = 25,175
SCM Treated Area (ft2) = 1,773,763
Catchment Routing: No errors
Treating Runoff from
Existing BUA or Offsite: no
Disturbed Area (ft2) = 1,325,000
Total Phosphorus Export Target
32.58
Scaled to Project Area (Ib/yr):
Total Area Project Area Total Area Project Area
Total Area Project Area
Post-Project Post-Project Post-Project Post-Project
Post-Project Post-Project
SCM-Treated SCM-Treated Untreated Untreated
after Treatment after Treatment
Area Only Area Only Areas Areas
40.7200 _I 40.7200 40.7200 40.7200 0.0000 0.0000
16% 16% 16% - 16% 0% 0% _
280,525 280,525 280,525 280,525 0 L 0
-
1,091,175 1,091,175 1,091,175 1,091,175 0 0
260% 260% N �
787,662 787,662 N 1
0.99 0.99 _ 0.99 _ 0.99 0.00 0.00
67.32 67.32 _ 67.32 I 67.32 _ 0.00 I- 0.00
1.65 1.65 1.65 1.65 0.00 0.00
43% 43%
20.32 20.32 N 1
0.17 0.17 0.17 _ 0.17 0.00 0.00
11.81 11.81 _ 11.81 I 11.81_ -
0.00 1- 0.00
0.29 0.29 0.29 0.29 0.00 0.00
-42% -42% \ \-8.47 -8.47 1

FOREST HILLS - STORMWATER PERMIT NO. SW5230902
Falls Lake ONLY: Onsite Reduction Compliance Check
Nitrogen Phosphorus
Onsite%Reduction Requirement
Export Target Scaled to Area (Ib/yr) 89.58 32.58
Export Load Post-Project Before Treatment 124.11 29.25
Total Reduction Need (Ib/yr)
Onsite Reduction Need(Ib/yr)
Onsite Export Target(Ib/yr)
Project Area Post-Project After Treatment 67.32 11.81