Revised Stormwater Management Report

Input Values R Recharge rate (permeability rate) (in/hr) Specific yield, Sy (dimensionless) sy default value is 0.15; max value is 0.2 provided that a lab test data is submitted Horizontal hydraulic conductivity {in/hr) Kh Kh = SxRecharge Rate (R) in the costal plan; Kh=R outside the coastal plan x 1/2 length of basin (x direction, in feet) y 1/2 width of basin (y direction, in feet) t Duration of infiltration period (hours) hilo) Initial thickness of saturated zone (feet) 14.356 h(max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) 356 Ah(max) Maximum groundwater mounding (beneath center of basin at end of infiltration period) Distance from Ground-water _ center of basin in x Mounding, in feet direction, in feet Re-Calculate Now Groundwater Mounding, in feet L000 | | | 1020 30 40 50 6 70 80 90 100 120 120 130 140 150 Disclaimer This spreadsheet solving the Hantush (1967) equation for ground-water mounding beneath an infiltration basin is made available to the general public as a convenience for those wishing to replicate values documented in the USGS Scientific Investigations Report 2010-5102 "Groundwater mounding beneath hypothetical stormwater infiltration basins" or to calculate values based on user-specified site conditions. Any changes made to the spreadsheet (other than values identified as user-specified) after transmission from the USGS could have unintended, undesirable consequences. These consequences could include, but may not be limited to: erroneous output, numerical instabilities, and violations of underlying assumptions that are inherent in results presented in the accompanying USGS published report. The USGS assumes no responsibility for the consequences of any changes made to the spreadsheet. If changes are made to the spreadsheet, the user is responsible for documenting the changes and justifying the results and conclusions.

Input Values R Recharge rate (permeability rate) (in/hr) Specific yield, Sy (dimensionless) sy default value is 0.15; max value is 0.2 provided that a lab test data is submitted Horizontal hydraulic conductivity (in/hr) Kh Kh = 5xRecharge Rate (R) in the costal plan; Kh=R outside the coastal plan x 1/2 length of basin (x direction, in feet) y 1/2 width of basin (y direction, in feet) t Duration of infiltration period (hours) ‘hi(Q) Initial thickness of saturated zone (feet) h(max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) Ah{max) Maximum groundwater mounding (beneath center of basin at end of infiltration period) Distance from Ground-water center of basin in x Mounding, in feet direction, in feet Pipe catcuate Now ee = Groundwater Mounding, in feet 80 90 100 110 120 130 140 150 Disclaimer This spreadsheet solving the Hantush (1967) equation for ground-water mounding beneath an infiltration basin is made available to the general public as a convenience for those wishing to replicate values documented in the USGS Scientific Investigations Report 2010-5102 "Groundwater mounding beneath hypothetical stormwater infiltration basins" or to calculate values based on user-specified site conditions. Any changes made to the spreadsheet (other than values identified as user-specified) after transmission from the USGS could have unintended, undesirable consequences. These consequences could include, but may not be limited to: erroneous output, numerical instabilities, and violations of underlying assumptions that are inherent in results presented in the accompanying USGS published report. The USGS assumes no responsibility for the consequences of any changes made to the spreadsheet. If changes are made to the spreadsheet, the user is responsible for documenting the changes and justifying the results and conclusions.

HQ Input Values R Recharge rate (permeability rate) (in/hr) Specific yield, Sy (dimensionless) sy default value is 0.15; max value is 0.2 provided that a lab test data is submitted Horizontal hydraulic conductivity (in/hr) Kh Kh = 5xRecharge Rate (R) in the costal plan; Kh=R outside the coastal plan x 1/2 length of basin (x direction, in feet) y 1/2 width of basin (y direction, in feet) t Duration of infiltration period (hours) hi(o) Initial thickness of saturated zone (feet) h{max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) E} Ah{max) Maximum groundwater mounding (beneath center of basin at end of infiltration period) Distance from ‘Ground-water center of basin in x Mounding, in feet direction, in feet 2.500 2,500 Re-Calculate Now 1.250 TT a Groundwater Mounding, in feet 0.001 0.001 0.001 0,001 0,001 0,001 Disclaimer This spreadsheet solving the Hantush (1967) equation for ground-water mounding beneath an infiltration basin is made available to the general public as a convenience for those wishing to replicate values documented in the USGS Scientific Investigations Report 2010-5102 "Groundwater mounding beneath hypothetical stormwater infiltration basins" or to calculate values based on user-specified site conditions. Any changes made to the spreadsheet (other than values identified as user-specified) after transmission from the USGS could have unintended, undesirable consequences. These consequences could include, but may not be limited to: erroneous output, numerical instabilities, and violations of underlying assumptions that are inherent in results presented in the accompanying USGS published report. The USGS assumes no responsibility for the consequences of any changes made to the spreadsheet. If changes are made to the spreadsheet, the user is responsible for documenting the changes and justifying the results and conclusions.

Input Values R Recharge rate (permeability rate) (in/hr) Specific yield, Sy (dimensionless) sy default value is 0.15; max value is 0.2 provided that a lab test data is submitted Horizontal hydraulic conductivity (in/hr) Kh Kh = 5xRecharge Rate (R) in the costal plan; Kh=R outside the coastal plan x 1/2 length of basin (x direction, in feet) y 1/2 width of basin (y direction, in feet) t Duration of infiltration period (hours) hilo) Initial thickness of saturated zone (feet) h{max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) ‘Ah(max) Maximum groundwater mounding (beneath center of basin at end of infiltration period) Distance from Ground-water _center of basin in x Mounding, in feet direction, in feet Re-Calculate Now Groundwater Mounding, in feet | 0,002 0,001 0,001 a0 90 100 110 120 130 140 150 This spreadsheet solving the Hantush (1967) equation for ground-water mounding beneath an infiltration basin is made available to the general public as a convenience for those wishing to replicate values documented in the USGS Scientific Investigations Report 2010-5102 "Groundwater mounding beneath hypothetical stormwater infiltration basins" or to calculate values based on user-specified site conditions. Any changes made to the spreadsheet (other than values identified as user-specified) after transmission from the USGS could have unintended, undesirable consequences. These consequences could include, but may not be limited to: erroneous output, numerical instabilities, and violations of underlying assumptions that are inherent in results presented in the accompanying USGS published report. The USGS assumes no responsibility for the consequences of any changes made to the spreadsheet. If changes are made to the spreadsheet, the user is responsible for documenting the changes and justifying the results and conclusions. Disclaimer

€ IL Input Values R Recharge rate (permeability rate) (in/hr) Specific yield, Sy (dimensionless) sy default value is 0.15; max value is 0.2 provided that a lab test data is submitted Horizontal hydraulic conductivity (in/hr) Kh ih = SxRecharge Rate (R) in the costal plan; Kh=R outside the coastal plan x 1/2 length of basin (x direction, in feet) y 1/2 width of basin (y direction, in feet) t Duration of infiltration period (hours) hi(o) Initial thickness of saturated zone (feet) h(max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) i ‘Ah(max) Maximum groundwater mounding (beneath center of basin at end of infiltration period) Distance from Ground-water _center of basin in x Mounding, in feet direction, in feet ee [Pipe cotcuare Now 0.080 | ————— ee _ S00c r 0,001 | 00 0.001 _ 1400 1.200 0.001 0,001 1.000 | 0.800 0.600 0.400 0.200 9.000 -0.200 90100 110 120 130 140 150 Disclaimer This spreadsheet solving the Hantush (1967) equation for ground-water mounding beneath an infiltration basin is made available to the general public as a convenience for those wishing to replicate values documented in the USGS Scientific Investigations Report 2010-5102 "Groundwater mounding beneath hypothetical stormwater infiltration basins" or to calculate vaiues based on user-specified site conditions. Any changes made to the spreadsheet (other than values identified as user-specified) after transmission from the USGS could have unintended, undesirable consequences. These consequences could include, but may not be limited to: erroneous output, numerical instabilities, and violations of underlying assumptions that are inherent in results presented in the accompanying USGS published report. The USGS assumes no responsibility for the consequences of any changes made to the spreadsheet. If changes are made to the spreadsheet, the user is responsible for documenting the changes and justifying the results and conclusions.

Beochucce Summ ey Basin 1 119,805 LAREE SCA le Basin 2 96,727 Basin3 30,461 Basin 4 110,323 Basin 5 78,640 Basin 6 14,828 Basin 7 137,867 Basin 8 76,936 Basin9 49,877 Basin 10 86,845 Basin 11 40,659 Basin 12 8,305 Total 731,468 Deficiet 629,658

— al: jroundwater = jecharge Select Township | | rowns! oxeesstrert ere TOwnENR, Factor iovember 2003 1.67 Annual Annual Annual Annual Land | Area TR-55 Land Cover soil | Recharge | Recharge Recharge | Recharge Segment | (acres) {in (cust) (in) (cust) 4 0.0 0.0 2 0.0 0.9 3 0.0 = 0.0 4 41467 4,070 0.0 2 5 155 90,995 147 60,987 8 14,9 43,952 | 0.0 : 7 45.7 959,416 14.9 300,916 8 23,872 8 40 1 12 13 14 45 Total = 29.0 Procedure to fill the Pre-Development and Post-Development Conditions Tables and proceed downward. Dont leave ‘displayed or used in calculations. For impervious areas outside of standard lots ‘Soll type for impervious areas are only required if an ifitation facil will be bu rea, then select TR-55 Land Cover, then select Sol, Start from the top of the table ‘ows (with A=) in between your segment entries. Rows with A=O wll al be Impervious Asea (qf) 614,632 a Post-Development Annual Recharge Deficit= 629,658 |(cubic feet) sf ' # 4 i RWC= 2.37 DRWC= 0.00 (in) a ERWC = 0.39 EDRWC= 0.00 in) < ,

Parameter Unit Parameter Symbol__Value Unit Value Unit [Empty Portion BMP Arca ‘ABMP sq.ft lof RWC under Posto | ERWC 0.39 [in Hnches of Runoff Qdesign | 3.05 fin to capture Natural Recharge BMP Effective Depth, IERWC Modified to F inches of Rainfall this is the desion variable _| SMP ti consider dEXC. EDRWC [iuecncma| to capture Poesion [accor Upper level of the BMP Empty Portion ; surface (negative ifabove | dBMPu in lof RWC under Infilt. ReRwc | 0.00 in Fai ata 38.5 |in ground) BMP. 7 ke [Depth of lower surface of Runoff Captured i EMP, must be>=damPu_| _S=XC ig JAvg. over imp. Area meh Post-development Land [Segment Location of BMP i SegBMP unitess cpu era Location is estrbuted erundetemined | ABMPIAimp ‘Aratio 706 Junitiess Volume Balance> Solve Problem to satisfy Annual Recharge IBMP Volume: VBMP. 8,910 Jou. BMP Check—> OK L i dEXC Check—> OK Post-D Deficit Recharge or desired recharge Vader cut aoa ene Rechengs 419,805 cust volume) BMP Location—> Location is selected as distributed or undetermined ‘ Represents | Post-D Impervious Area i Java BMP Recharge j u Aimp sq.ft 100.0% _|% infiltration i (or target Impervious Area) Efficiency Rechaiged | , - PaRaintal Reet Zens WaterCapenty’| RWe Sain lbecame Runoff TEER | Pdesicn is accurate only ater BMP dimensions are updated to ricke rech volume= deficit volume. The pet RWC Modified to cRunoft Iconsider dEXC ORWC [Gace infitrated ies ot BMP inftreton porto fing and the area occupied by BMP ere ignoted in hese calculations, Results lesRunoff [Climatic Factor G-factor 167 frounits [Recharged SAK |, sensetive to dBMP, make sure dEMP selected is small enough for BIAP to empty in tess than 3 days. Fes lar a 1%Rainfall Average Annual P Pavg OS Nl Recharged eels Segment Location of BMP you select “impervous areas" RWC vil be minimal but not zero as determined [Recharge Requirement. dr 124 in lover Imp. Area b the soil type and a shallow root zene for this Land Cover allowing consideration of lateral flow and other los le ies my " ai | " se. t ing the sa i i ra rt nm BI tot the l (Beioa 8

[Project Name Description Analysis Date | BMP or LID Type West Essex Highlands _|West Orange, Essex Coun’ 05/31/24 bm ae set — 7 5 —— Parameter Symbol Valu it Parameter Symbol Value Unit Parameter Symbol Value Unit Empty Portion EMP Area ABMP sq.ft lof RWC under Post-D | ERWC 0.39 Jin Hein aad design | 3.05 Natural Recharge Pt EMP Effective Depth, IERWC Modified to inches of Rainfall this is the design variable _| %8MP te Iconsider dEXC EDRWE eee" to capture Pdesion |iimeaeue| Upper level of the BMP Empty Portion surface (negative if above | deMPu lof RWC under In RERWC 0.00 |in aca hie wi 38.5 |in ground) IBMP_ Va. oven Imp ATeS | ae. Depth of lower surface of Runoff Captured BMP, must be>=dBMPu_| EXC ial Avg. over imp. Area 385 jin Post-development Land Segment Location of BMP : SegBMP lunitiess iu Zero Location is distnbuted orundetermined isfy Annual Recharge BMP Check-—> OK n dEXC Check-—-> OK Post-D Deficit Recharge (or desired recharge Vdef Jou.ft Ve 96,727 |cu.tt volume) me BMP Location—> Location is selected as distributed or undetermined Represents Post-D Impervious Area , JAvg BMP Recharge 4 Aimp sa.ft 100.0% |% Infitration (or target Impervious Area) Efficiency Recharged : eRaintall Reat Zone Wales Capsciy'| Rwc Nl lbecame Runoff rol design is accurate only ster EMP dimensions are updated to mickerech volum= deficit votume. The gertion IRWC Modified to: A Runoff consider dEXC RWC | gameoumma Infitrated eels oF EMP infitration prio filing and the area occupied ty BMP are ignored in these caeultions. Resulls are : PeRunoff pliniaticiactor, C-factor whe po units [Recharged_ 49% 1% jsensetive to BMP, make sure dMP selected is small enough for BMP to empty in less than 3 days. For land q Rainfall peverageAniiuel? Pavg oma Recharged Senoa% [Segment Location of BMP if you select “impervious areas” RWC wal be minimal but not zero as determined by Recharge Requirement on eee, lover Imp. Area ss : ine soil type and a shallow root zone for this Land Cover allowing consideration of lateral flow and other losses. How to solve for different recharge volumes: By defaull the spreadsheet assigns the values of total deficit recharge volume "def" and total proposed impervious area "Aimp” from the “Annual Recharge” sheet to "VdeF" and "Aimp" on this page. This allows solution for a single BMP to handle the entire recharge requirement assuming the runoff from

osed impervious area "Aimp” from the “Annual Recharge” sheet to "VdeF" and "Aimp" on this page. This allows solution for a single BMP to handle the entire recharge requirement assuming the runoff from entire impervious area is available to the BMP. {To solve for a smaller BMP or a LID-IMP to recharge only part of the recharge requirement, set Vdef to your target value and Aimp to impervious area directly connected to your infiltration facility and then solve for |ABMP or dBMP. To go back to the default configuration clk the "Default Vdef & Aimp" button.