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37-18 Site Plan
DEQ Virginia Runoff Reduction Method Re‐Development Compliance Spreadsheet ‐ Version 3.0 Project Name: Date: Linear Development Project?No Site Information Post‐Development Project (Treatment Volume and Loads) 3.94 #### 20%Linear project?No The site's net increase in impervious cover (acres) is: 0.899 ✔ Post‐Development TP Load Reduction for Site (lb/yr): 1.98 ✔ Pre‐ReDevelopment Land Cover (acres) A Soils B Soils C Soils D Soils Totals Forest/Open Space (acres) ‐‐ undisturbed forest/open space 0.00 Managed Turf (acres) ‐‐ disturbed, graded for yards or other turf to be mowed/managed 3.56 3.56 Impervious Cover (acres)0.38 0.38 3.94 Post‐Development Land Cover (acres) A Soils B Soils C Soils D Soils Totals Forest/Open Space (acres) ‐‐ undisturbed, protected forest/open space or reforested land 0.00 Managed Turf (acres) ‐‐ disturbed, graded for yards or other turf to be mowed/managed 2.66 2.66 Impervious Cover (acres)1.27 1.27 Area Check OK. OK. OK. OK.3.94 Constants Runoff Coefficients (Rv) Annual Rainfall (inches)43 A Soils B Soils C Soils D Soils Target Rainfall Event (inches)1.00 Forest/Open Space 0.02 0.03 0.04 0.05 Total Phosphorus (TP) EMC (mg/L)0.26 Managed Turf 0.15 0.20 0.22 0.25 Total Nitrogen (TN) EMC (mg/L)1.86 Impervious Cover 0.95 0.95 0.95 0.95 Target TP Load (lb/acre/yr)0.41 Pj (unitless correction factor)0.90 Pre‐ReDevelopment Listed Adjusted1 Forest/Open Space Cover (acres)0.00 0.00 Forest/Open Space Cover (acres)0.00 Forest/Open Space Cover (acres)0.00 Weighted Rv(forest)0.00 0.00 Weighted Rv(forest)0.00 Weighted Rv(forest)0.00 % Forest 0% 0%% Forest 0%% Forest 0% Managed Turf Cover (acres)3.56 2.66 Managed Turf Cover (acres)2.66 Managed Turf Cover (acres)2.66 Weighted Rv(turf)0.20 0.20 Weighted Rv (turf)0.20 Weighted Rv (turf)0.20 % Managed Turf 90% 88%% Managed Turf 68%% Managed Turf 88% Impervious Cover (acres)0.38 0.38 Impervious Cover (acres)1.27 ReDev. Impervious Cover (acres)0.38 New Impervious Cover (acres)0.90 Rv(impervious)0.95 0.95 Rv(impervious)0.95 Rv(impervious)0.95 Rv(impervious)0.95 % Impervious 10% 12%% Impervious 32%% Impervious 12% Total Site Area (acres)3.94 3.04 Final Site Area (acres)3.94 Total ReDev. Site Area (acres)3.04 Site Rv 0.27 0.29 Final Post Dev Site Rv 0.44 ReDev Site Rv 0.29 Pre‐ReDevelopment Treatment Volume (acre‐ft) 0.0891 0.0741 Final Post‐Development Treatment Volume (acre‐ft) 0.1452 Post‐ReDevelopment Treatment Volume (acre‐ft) 0.0741 Post‐Development Treatment Volume (acre‐ft) 0.0712 Pre‐ReDevelopment Treatment Volume (cubic feet) 3,879 3,227 Final Post‐Development Treatment Volume (cubic feet) 6,327 Post‐ReDevelopment Treatment Volume (cubic feet) 3,227 Post‐Development Treatment Volume (cubic feet) 3,100 Pre‐ReDevelopment TP Load (lb/yr)2.44 2.03 Final Post‐ Development TP Load (lb/yr) 3.98 Post‐ReDevelopment Load (TP) (lb/yr)* 2.03 Post‐Development TP Load (lb/yr)1.95 Pre‐ReDevelopment TP Load per acre (lb/acre/yr)0.62 0.67 Final Post‐Development TP Load per acre (lb/acre/yr) 1.01 Post‐ReDevelopment TP Load per acre (lb/acre/yr) 0.67 1.25 Max. Reduction Required (Below Pre‐ ReDevelopment Load) 20% TP Load Reduction Required for Redeveloped Area (lb/yr) 0.41 TP Load Reduction Required for New Impervious Area (lb/yr) 1.58 1.98 N/A 17.44 Cornerstone United Pentecostal Church 1/22/2019 LAND COVER SUMMARY -- POST DEVELOPMENTLAND COVER SUMMARY -- PRE-REDEVELOPMENT Maximum reduction required: Enter Total Disturbed Area (acres) →Check: Land cover areas entered correctly? Total disturbed area entered? BMP Design Specifications List: Treatment Volume and Nutrient Load Land Cover Summary‐Post (Final) 2011 Stds & Specs Land Cover Summary‐Pre TP Load Reduction Required (lb/yr) Post‐Development Requirement for Site Area Nitrogen Loads (Informational Purposes Only) Baseline TP Load (lb/yr) (0.41 lbs/acre/yr applied to pre‐redevelopment area excluding pervious land proposed for new impervious cover) Linear Project TP Load Reduction Required (lb/yr): 1 Adjusted Land Cover Summary: Pre ReDevelopment land cover minus pervious land cover (forest/open space or managed turf) acreage proposed for new impervious cover. Adjusted total acreage is consistent with Post‐ReDevelopment acreage (minus acreage of Post ReDev. & New Impervious Treatment Volume and Nutrient Load Land Cover Summary‐Post Post‐Development New Impervious Pre‐ReDevelopment TN Load (lb/yr) Final Post‐Development TN Load (Post‐ReDevelopment & New Impervious) (lb/yr) 28.44 Land Cover Summary‐Post Post‐ReDevelopment CLEAR ALL data input cells constant values calculation cells final results 2011 BMP Standards and Specifications 2013 Draft BMP Standards and Specifications Drainage Area A Drainage Area A Land Cover (acres) A Soils B Soils C Soils D Soils Totals Land Cover Rv ` Forest/Open Space (acres)0.00 0.00 Managed Turf (acres)0.31 0.31 0.20 Impervious Cover (acres) 1.19 1.19 0.95 2.71 Total 1.50 4,317 Stormwater Best Management Practices (RR = Runoff Reduction)‐‐Select from dropdown lists‐‐ Practice Runoff Reduction Credit (%) Managed Turf Credit Area (acres) Impervious Cover Credit Area (acres) Volume from Upstream Practice (ft3) Runoff Reduction (ft3) Remaining Runoff Volume (ft3) Total BMP Treatment Volume (ft3) Phosphorus Removal Efficiency (%) Phosphorus Load from Upstream Practices (lb) Untreated Phosphorus Load to Practice (lb) Phosphorus Removed By Practice (lb) Remaining Phosphorus Load (lb) Nitrogen Removal Efficiency (%) Nitrogen Load from Upstream Practices (lbs) Untreated Nitrogen Load to Practice (lbs) Nitrogen Removed By Practice (lbs) Remaining Nitrogen Load (lbs) 1. Vegetated Roof (RR)1. Vegetated Roof (RR) 1.a. Vegetated Roof #1 (Spec #5) 45 0 0 0 0 0.00 0.00 0.00 0 0.00 0.00 0.00 1.b. Vegetated Roof #2 (Spec #5) 60 0 0 0 0 0.00 0.00 0.00 0 0.00 0.00 0.00 2. Rooftop Disconnection (RR)2. Rooftop Disconnection (RR) 2.a. Simple Disconnection to A/B Soils (Spec #1)50 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 2.b. Simple Disconnection to C/D Soils (Spec #1)25 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 2.c. To Soil Amended Filter Path as per specifications (existing C/D soils) (Spec #4)50 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 2.d. To Dry Well or French Drain #1, Micro‐Infilration #1 (Spec #8)50 0 0 0 0 25 0.00 0.00 0.00 0.00 15 0.00 0.00 0.00 0.00 2.e. To Dry Well or French Drain #2, Micro‐Infiltration #2 (Spec #8)90 0 0 0 0 25 0.00 0.00 0.00 0.00 15 0.00 0.00 0.00 0.00 2.f. To Rain Garden #1, Micro‐Bioretention #1 (Spec #9)40 0 0 0 0 25 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 2.g. To Rain Garden #2, Micro‐Bioretention #2 (Spec #9)80 0 0 0 0 50 0.00 0.00 0.00 0.00 60 0.00 0.00 0.00 0.00 2.h. To Rainwater Harvesting (Spec #6) 0 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 2.i. To Stormwater Planter, Urban Bioretention (Spec #9, Appendix A)40 0 0 0 0 25 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 3. Permeable Pavement (RR)3. Permeable Pavement (RR) 3.a. Permeable Pavement #1 (Spec #7) 45 0 0 0 0 25 0.00 0.00 0.00 0.00 25 0.00 0.00 0.00 0.00 3.b. Permeable Pavement #2 (Spec #7) 75 0 0 0 25 0.00 0.00 0.00 25 0.00 0.00 0.00 4. Grass Channel (RR)4. Grass Channel (RR) 4.a. Grass Channel A/B Soils (Spec #3) 20 0 0 0 0 15 0.00 0.00 0.00 0.00 20 0.00 0.00 0.00 0.00 4.b. Grass Channel C/D Soils (Spec #3) 10 0 0 0 0 15 0.00 0.00 0.00 0.00 20 0.00 0.00 0.00 0.00 4.c. Grass Channel with Compost Amended Soils as per specs (see Spec #4)30 0 0 0 0 15 0.00 0.00 0.00 0.00 20 0.00 0.00 0.00 0.00 5. Dry Swale (RR)5. Dry Swale (RR) 5.a. Dry Swale #1 (Spec #10) 40 0 0 0 0 20 0.00 0.00 0.00 0.00 25 0.00 0.00 0.00 0.00 5.b. Dry Swale #2 (Spec #10) 60 0 0 0 0 40 0.00 0.00 0.00 0.00 35 0.00 0.00 0.00 0.00 6. Bioretention (RR)6. Bioretention (RR) 6.a. Bioretention #1 or Micro‐Bioretention #1 or Urban Bioretention (Spec #9)40 0 0 0 0 25 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 6.b. Bioretention #2 or Micro‐Bioretention #2 (Spec #9)80 0.31 1.19 0 3,454 863 4,317 50 0.00 2.71 2.44 0.27 60 0.00 19.38 17.83 1.55 7. Infiltration (RR)7. Infiltration (RR) 7.a. Infiltration #1 (Spec #8) 50 0 0 0 0 25 0.00 0.00 0.00 0.00 15 0.00 0.00 0.00 0.00 7.b. Infiltration #2 (Spec #8) 90 0 0 0 0 25 0.00 0.00 0.00 0.00 15 0.00 0.00 0.00 0.00 8. Extended Detention Pond (RR)8. Extended Detention Pond (RR) 8.a. ED #1 (Spec #15) 0 0 0 0 0 15 0.00 0.00 0.00 0.00 10 0.00 0.00 0.00 0.00 8.b. ED #2 (Spec #15) 15 0 0 0 0 15 0.00 0.00 0.00 0.00 10 0.00 0.00 0.00 0.00 9. Sheetflow to Filter/Open Space (RR) 9.a. Sheetflow to Conservation Area, A/B Soils (Spec #2)75 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 9.b. Sheetflow to Conservation Area, C/D Soils (Spec #2)50 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 9.c. Sheetflow to Vegetated Filter Strip, A Soils or Compost Amended B/C/D Soils (Spec #2 & #4) 50 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 TOTAL IMPERVIOUS COVER TREATED (ac)1.19 AREA CHECK:OK. TOTAL MANAGED TURF AREA TREATED (ac)0.31 AREA CHECK:OK. TOTAL RUNOFF REDUCTION IN D.A. A (ft3)3,454 TOTAL PHOSPHORUS AVAILABLE FOR REMOVAL IN D.A. A (lb/yr)2.71 TOTAL PHOSPHORUS REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr)2.44 TOTAL RUNOFF REDUCTION IN D.A. A (ft3)3,454 TOTAL PHOSPHORUS REMAINING AFTER APPLYING RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr)0.27 NITROGEN REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr)17.83 SEE WATER QUALITY COMPLIANCE TAB FOR SITE COMPLIANCE CALCULATIONS SEE WATER QUALITY COMPLIANCE TAB FOR SITE CALCULATIONS (Information Only) 10. Wet Swale (no RR) 10.a. Wet Swale #1 (Spec #11) 0 0 0 0 0 20 0.00 0.00 0.00 0.00 25 0.00 0.00 0.00 0.00 10.b. Wet Swale #2 (Spec #11) 0 0 0 0 0 40 0.00 0.00 0.00 0.00 35 0.00 0.00 0.00 0.00 11. Filtering Practices (no RR) 11.a.Filtering Practice #1 (Spec #12) 0 0 0 0 0 60 0.00 0.00 0.00 0.00 30 0.00 0.00 0.00 0.00 11.b. Filtering Practice #2 (Spec #12) 0 0 0 0 0 65 0.00 0.00 0.00 0.00 45 0.00 0.00 0.00 0.00 12. Constructed Wetland (no RR)12. Constructed Wetland (no RR) 12.a.Constructed Wetland #1 (Spec #13) 0 0 0 0 0 50 0.00 0.00 0.00 0.00 25 0.00 0.00 0.00 0.00 12.b. Constructed Wetland #2 (Spec #13) 0 0 0 0 0 75 0.00 0.00 0.00 0.00 55 0.00 0.00 0.00 0.00 13. Wet Ponds (no RR) 13.a. Wet Pond #1 (Spec #14) 0 0 0 0 0 50 0.00 0.00 0.00 0.00 30 0.00 0.00 0.00 0.00 13.b. Wet Pond #1 (Coastal Plain) (Spec #14) 0 0 0 0 0 45 0.00 0.00 0.00 0.00 20 0.00 0.00 0.00 0.00 13.c. Wet Pond #2 (Spec #14) 0 0 0 0 0 75 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 13.d. Wet Pond #2 (Coastal Plain) (Spec #14) 0 0 0 0 0 65 0.00 0.00 0.00 0.00 30 0.00 0.00 0.00 0.00 14.a. Manufactured Treatment Device‐ Hydrodynamic 0 0 0 0 0 20 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 14.b. Manufactured Treatment Device‐Filtering 0 0 0 0 0 20 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 14.c. Manufactured Treatment Device‐Generic 0 0 0 0 0 20 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 TOTAL IMPERVIOUS COVER TREATED (ac)1.19 AREA CHECK:OK. TOTAL MANAGED TURF AREA TREATED (ac)0.31 AREA CHECK:OK. TOTAL PHOSPHORUS REMOVAL REQUIRED ON SITE (lb/yr)1.98 TOTAL PHOSPHORUS AVAILABLE FOR REMOVAL IN D.A. A (lb/yr)2.71 TOTAL PHOSPHORUS REMOVED WITHOUT RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr)0.00 TOTAL PHOSPHORUS REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr)2.44 TOTAL PHOSPHORUS LOAD REDUCTION ACHIEVED IN D.A. A (lb/yr)2.44 TOTAL PHOSPHORUS REMAINING AFTER APPLYING BMP LOAD REDUCTIONS IN D.A. A (lb/yr)0.27 SEE WATER QUALITY COMPLIANCE TAB FOR SITE COMPLIANCE CALCULATIONS NITROGEN REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr)17.83 NITROGEN REMOVED WITHOUT RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr)0.00 TOTAL NITROGEN REMOVED IN D.A. A (lb/yr)17.83 9. Sheetflow to Filter/Open Space (RR) Total Phosphorus Available for Removal in D.A. A (lb/yr) Post Development Treatment Volume in D.A. A (ft3) Downstream Practice to be Employed 14. Manufactured Treatment Devices (no RR) 10. Wet Swale (Coastal Plain) (no RR) 11. Filtering Practices (no RR) 13. Wet Ponds (no RR) 14. Manufactured BMP (no RR) CLEAR BMPAREAS Drainage Area B Drainage Area A Land Cover (acres) A Soils B Soils C Soils D Soils Totals Land Cover Rv ` Forest/Open Space (acres)0.00 0.00 Managed Turf (acres)2.35 2.35 0.20 Impervious Cover (acres) 0.09 0.09 0.95 1.26 Total 2.44 2,010 Stormwater Best Management Practices (RR = Runoff Reduction)‐‐Select from dropdown lists‐‐ Practice Runoff Reduction Credit (%) Managed Turf Credit Area (acres) Impervious Cover Credit Area (acres) Volume from Upstream Practice (ft3) Runoff Reduction (ft3) Remaining Runoff Volume (ft3) Total BMP Treatment Volume (ft3) Phosphorus Removal Efficiency (%) Phosphorus Load from Upstream Practices (lb) Untreated Phosphorus Load to Practice (lb) Phosphorus Removed By Practice (lb) Remaining Phosphorus Load (lb) Nitrogen Removal Efficiency (%) Nitrogen Load from Upstream Practices (lbs) Untreated Nitrogen Load to Practice (lbs) Nitrogen Removed By Practice (lbs) Remaining Nitrogen Load (lbs) 1. Vegetated Roof (RR)1. Vegetated Roof (RR) 1.a. Vegetated Roof #1 (Spec #5) 45 0 0 0 0 0.00 0.00 0.00 0 0.00 0.00 0.00 1.b. Vegetated Roof #2 (Spec #5) 60 0 0 0 0 0.00 0.00 0.00 0 0.00 0.00 0.00 2. Rooftop Disconnection (RR)2. Rooftop Disconnection (RR) 2.a. Simple Disconnection to A/B Soils (Spec #1)50 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 2.b. Simple Disconnection to C/D Soils (Spec #1)25 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 2.c. To Soil Amended Filter Path as per specifications (existing C/D soils) (Spec #4)50 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 2.d. To Dry Well or French Drain #1, Micro‐Infilration #1 (Spec #8)50 0 0 0 0 25 0.00 0.00 0.00 0.00 15 0.00 0.00 0.00 0.00 2.e. To Dry Well or French Drain #2, Micro‐Infiltration #2 (Spec #8)90 0 0 0 0 25 0.00 0.00 0.00 0.00 15 0.00 0.00 0.00 0.00 2.f. To Rain Garden #1, Micro‐Bioretention #1 (Spec #9)40 0 0 0 0 25 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 2.g. To Rain Garden #2, Micro‐Bioretention #2 (Spec #9)80 0 0 0 0 50 0.00 0.00 0.00 0.00 60 0.00 0.00 0.00 0.00 2.h. To Rainwater Harvesting (Spec #6) 0 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 2.i. To Stormwater Planter, Urban Bioretention (Spec #9, Appendix A)40 0 0 0 0 25 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 3. Permeable Pavement (RR)3. Permeable Pavement (RR) 3.a. Permeable Pavement #1 (Spec #7) 45 0 0 0 0 25 0.00 0.00 0.00 0.00 25 0.00 0.00 0.00 0.00 3.b. Permeable Pavement #2 (Spec #7) 75 0 0 0 25 0.00 0.00 0.00 25 0.00 0.00 0.00 4. Grass Channel (RR)4. Grass Channel (RR) 4.a. Grass Channel A/B Soils (Spec #3) 20 0 0 0 0 15 0.00 0.00 0.00 0.00 20 0.00 0.00 0.00 0.00 4.b. Grass Channel C/D Soils (Spec #3) 10 0 0 0 0 15 0.00 0.00 0.00 0.00 20 0.00 0.00 0.00 0.00 4.c. Grass Channel with Compost Amended Soils as per specs (see Spec #4)30 0 0 0 0 15 0.00 0.00 0.00 0.00 20 0.00 0.00 0.00 0.00 5. Dry Swale (RR)5. Dry Swale (RR) 5.a. Dry Swale #1 (Spec #10) 40 0 0 0 0 20 0.00 0.00 0.00 0.00 25 0.00 0.00 0.00 0.00 5.b. Dry Swale #2 (Spec #10) 60 0 0 0 0 40 0.00 0.00 0.00 0.00 35 0.00 0.00 0.00 0.00 6. Bioretention (RR)6. Bioretention (RR) 6.a. Bioretention #1 or Micro‐Bioretention #1 or Urban Bioretention (Spec #9)40 0 0 0 0 25 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 6.b. Bioretention #2 or Micro‐Bioretention #2 (Spec #9)80 0 0 0 0 50 0.00 0.00 0.00 0.00 60 0.00 0.00 0.00 0.00 7. Infiltration (RR)7. Infiltration (RR) 7.a. Infiltration #1 (Spec #8) 50 0 0 0 0 25 0.00 0.00 0.00 0.00 15 0.00 0.00 0.00 0.00 7.b. Infiltration #2 (Spec #8) 90 0 0 0 0 25 0.00 0.00 0.00 0.00 15 0.00 0.00 0.00 0.00 8. Extended Detention Pond (RR)8. Extended Detention Pond (RR) 8.a. ED #1 (Spec #15) 0 0 0 0 0 15 0.00 0.00 0.00 0.00 10 0.00 0.00 0.00 0.00 8.b. ED #2 (Spec #15) 15 0 0 0 0 15 0.00 0.00 0.00 0.00 10 0.00 0.00 0.00 0.00 9. Sheetflow to Filter/Open Space (RR) 9.a. Sheetflow to Conservation Area, A/B Soils (Spec #2)75 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 9.b. Sheetflow to Conservation Area, C/D Soils (Spec #2)50 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 9.c. Sheetflow to Vegetated Filter Strip, A Soils or Compost Amended B/C/D Soils (Spec #2 & #4) 50 0 0 0 0 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 TOTAL IMPERVIOUS COVER TREATED (ac)0.00 AREA CHECK:OK. TOTAL TURF AREA TREATED (ac)0.00 AREA CHECK:OK. TOTAL RUNOFF REDUCTION IN D.A. B (ft3)0 TOTAL PHOSPHORUS AVAILABLE FOR REMOVAL IN D.A. B (lb/yr)1.26 TOTAL PHOSPHORUS REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. B (lb/yr)0.00 TOTAL RUNOFF REDUCTION IN D.A. B (ft3)0 TOTAL PHOSPHORUS REMAINING AFTER APPLYING RUNOFF REDUCTION PRACTICES IN D.A. B (lb/yr)1.26 NITROGEN REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. B (lb/yr)0.00 SEE WATER QUALITY COMPLIANCE TAB FOR SITE COMPLIANCE CALCULATIONS SEE WATER QUALITY COMPLIANCE TAB FOR SITE CALCULATIONS (Information Only) 10. Wet Swale (no RR) 10.a. Wet Swale #1 (Spec #11) 0 0 0 0 0 20 0.00 0.00 0.00 0.00 25 0.00 0.00 0.00 0.00 10.b. Wet Swale #2 (Spec #11) 0 0 0 0 0 40 0.00 0.00 0.00 0.00 35 0.00 0.00 0.00 0.00 11. Filtering Practices (no RR) 11.a.Filtering Practice #1 (Spec #12) 0 0 0 0 0 60 0.00 0.00 0.00 0.00 30 0.00 0.00 0.00 0.00 11.b. Filtering Practice #2 (Spec #12) 0 0 0 0 0 65 0.00 0.00 0.00 0.00 45 0.00 0.00 0.00 0.00 12. Constructed Wetland (no RR)12. Constructed Wetland (no RR) 12.a.Constructed Wetland #1 (Spec #13) 0 0 0 0 0 50 0.00 0.00 0.00 0.00 25 0.00 0.00 0.00 0.00 12.b. Constructed Wetland #2 (Spec #13) 0 0 0 0 0 75 0.00 0.00 0.00 0.00 55 0.00 0.00 0.00 0.00 13. Wet Ponds (no RR) 13.a. Wet Pond #1 (Spec #14) 0 0 0 0 0 50 0.00 0.00 0.00 0.00 30 0.00 0.00 0.00 0.00 13.b. Wet Pond #1 (Coastal Plain) (Spec #14) 0 0 0 0 0 45 0.00 0.00 0.00 0.00 20 0.00 0.00 0.00 0.00 13.c. Wet Pond #2 (Spec #14) 0 0 0 0 0 75 0.00 0.00 0.00 0.00 40 0.00 0.00 0.00 0.00 13.d. Wet Pond #2 (Coastal Plain) (Spec #14) 0 0 0 0 0 65 0.00 0.00 0.00 0.00 30 0.00 0.00 0.00 0.00 14.a. Manufactured Treatment Device‐ Hydrodynamic 0 0 0 0 0 20 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 14.b. Manufactured Treatment Device‐Filtering 0 0 0 0 0 20 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 14.c. Manufactured Treatment Device‐Generic 0 0 0 0 0 20 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 TOTAL IMPERVIOUS COVER TREATED (ac)0.00 AREA CHECK:OK. TOTAL MANAGED TURF AREA TREATED (ac)0.00 AREA CHECK:OK. TOTAL PHOSPHORUS REMOVAL REQUIRED ON SITE (lb/yr)1.98 TOTAL PHOSPHORUS AVAILABLE FOR REMOVAL IN D.A. B (lb/yr)1.26 TOTAL PHOSPHORUS REMOVED WITHOUT RUNOFF REDUCTION PRACTICES IN D.A. B (lb/yr)0.00 TOTAL PHOSPHORUS REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. B (lb/yr)0.00 TOTAL PHOSPHORUS LOAD REDUCTION ACHIEVED IN D.A. B (lb/yr)0.00 TOTAL PHOSPHORUS REMAINING AFTER APPLYING BMP LOAD REDUCTIONS IN D.A. B (lb/yr)1.26 SEE WATER QUALITY COMPLIANCE TAB FOR SITE COMPLIANCE CALCULATIONS NITROGEN REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. B (lb/yr)0.00 NITROGEN REMOVED WITHOUT RUNOFF REDUCTION PRACTICES IN D.A. B (lb/yr)0.00 TOTAL NITROGEN REMOVED IN D.A. B (lb/yr)0.00 Total Phosphorus Available for Removal in D.A. B (lb/yr) Post Development Treatment Volume in D.A. B (ft3) Downstream Practice to be Employed 9. Sheetflow to Filter/Open Space (RR) 10. Wet Swale (Coastal Plain) (no RR) 14. Manufactured Treatment Devices (no RR)14. Manufactured BMP (no RR) 11. Filtering Practices (no RR) 13. Wet Ponds (no RR) CLEAR BMP AREAS Site Results (Water Quality Compliance) Area Checks D.A. AD.A. BD.A. CD.A. DD.A. EAREA CHECK FOREST/OPEN SPACE (ac)0.00 0.00 0.00 0.00 0.00 OK. IMPERVIOUS COVER (ac)1.19 0.09 0.00 0.00 0.00 OK. IMPERVIOUS COVER TREATED (ac)1.19 0.00 0.00 0.00 0.00 OK. MANAGED TURF AREA (ac)0.31 2.35 0.00 0.00 0.00 OK. MANAGED TURF AREA TREATED (ac)0.31 0.00 0.00 0.00 0.00 OK. AREA CHECK OK. OK. OK. OK. OK. Site Treatment Volume (ft3)6,327 Runoff Reduction Volume and TP By Drainage Area D.A. AD.A. BD.A. CD.A. DD.A. ETOTAL RUNOFF REDUCTION VOLUME ACHIEVED (ft3)3,454 0 0 0 0 3,454 TP LOAD AVAILABLE FOR REMOVAL (lb/yr)2.71 1.26 0.00 0.00 0.00 3.98 TP LOAD REDUCTION ACHIEVED (lb/yr)2.44 0.00 0.00 0.00 0.00 2.44 TP LOAD REMAINING (lb/yr)0.27 1.26 0.00 0.00 0.00 1.54 NITROGEN LOAD REDUCTION ACHIEVED (lb/yr)17.83 0.00 0.00 0.00 0.00 17.83 Total Phosphorus LINEAR PROJECT: FINAL POST‐DEVELOPMENT TP LOAD (lb/yr)3.98 TP LOAD REDUCTION REQUIRED (lb/yr)1.98 TP LOAD REDUCTION ACHIEVED (lb/yr)2.44 TP LOAD REMAINING (lb/yr):1.54 REMAINING TP LOAD REDUCTION REQUIRED (lb/yr):0.00 ** Total Nitrogen (For Information Purposes) POST‐DEVELOPMENT LOAD (lb/yr)28.44 NITROGEN LOAD REDUCTION ACHIEVED (lb/yr)17.83 REMAINING POST‐DEVELOPMENT NITROGEN LOAD (lb/yr)10.61 ** TARGET TP REDUCTION EXCEEDED BY 0.45 LB/YEAR ** Runoff Volume and Curve Number Calculations 1‐year storm 2‐year storm 10 ‐year storm 2.39 2.87 4.16 *Notes (see below): A Soils B Soils C Soils D Soils Total Area (acres):1.50 Area (acres)0.00 0.00 0.00 0.00 CN 30 55 70 77 3,454 Area (acres)0.00 0.31 0.00 0.00 CN 39 61 74 80 Area (acres)0.00 1.19 0.00 0.00 CN 98 98 98 98 CN(D.A. A) 90 1‐year storm 2‐year storm 10‐year storm 1.43 1.87 3.07 0.80 1.23 2.44 Adjusted CN*80 81 83 *See Notes above A Soils B Soils C Soils D Soils Total Area (acres):2.44 Area (acres)0.00 0.00 0.00 0.00 CN 30 55 70 77 0 Area (acres)0.00 2.35 0.00 0.00 CN 39 61 74 80 Area (acres)0.00 0.09 0.00 0.00 CN 98 98 98 98 CN(D.A. B) 62 1‐year storm 2‐year storm 10‐year storm 0.19 0.35 0.95 0.19 0.35 0.95 Adjusted CN*62 62 62 *See Notes above A Soils B Soils C Soils D Soils Total Area (acres):0.00 Area (acres)0.00 0.00 0.00 0.00 CN 30 55 70 77 0 Area (acres)0.00 0.00 0.00 0.00 CN 39 61 74 80 Area (acres)0.00 0.00 0.00 0.00 CN 98 98 98 98 CN(D.A. C) 0 1‐year storm 2‐year storm 10‐year storm 0.00 0.00 0.00 0.00 0.00 0.00 Adjusted CN*000 *See Notes above A Soils B Soils C Soils D Soils Total Area (acres):0.00 Area (acres)0.00 0.00 0.00 0.00 CN 30 55 70 77 0 Area (acres)0.00 0.00 0.00 0.00 CN 39 61 74 80 Area (acres)0.00 0.00 0.00 0.00 CN 98 98 98 98 CN(D.A. D) 0 1‐year storm 2‐year storm 10‐year storm 0.00 0.00 0.00 0.00 0.00 0.00 Adjusted CN*000 *See Notes above A Soils B Soils C Soils D Soils Total Area (acres):0.00 Area (acres)0.00 0.00 0.00 0.00 CN 30 55 70 77 0 Area (acres)0.00 0.00 0.00 0.00 CN 39 61 74 80 Area (acres)0.00 0.00 0.00 0.00 CN 98 98 98 98 CN(D.A. E) 0 1‐year storm 2‐year storm 10‐year storm 0.00 0.00 0.00 0.00 0.00 0.00 Adjusted CN*000 *See Notes above [1] The curve numbers and runoff volumes computed in this spreadsheet for each drainage area are limited in their applicability for determining and demonstrating compliance with water quantity requirements. See VRRM User's Guide and Documentation for addi [2] Runoff Volume (RV) for pre‐ and post‐development drainage areas must be in volumetric units (e.g., acre‐feet or cubic feet) when using the Energy Balance Equation. Runoff measured in watershed ‐inches and shown in the spreadsheet as RV(watershed‐inch) [3] Adjusted CNs are based on runoff reduction volumes as calculated in D.A. tabs. An alternative CN adjustment calculation for Vegetated Roofs is included in BMP specification No. 5. Enter design storm rainfall depths (in): Drainage Area E RVDeveloped (watershed‐inch) with Runoff Reduction* Impervious Cover Impervious Cover RVDeveloped (watershed‐inch) with no Runoff Reduction* Forest/Open Space ‐‐ undisturbed, protected forest/open space or reforested land Forest/Open Space ‐‐ undisturbed, protected forest/open space or reforested land Runoff Reduction Volume (ft3): Runoff Reduction Volume (ft3): RVDeveloped (watershed‐inch) with no Runoff Reduction* Runoff Reduction Volume (ft3): RVDeveloped (watershed‐inch) with Runoff Reduction* Forest/Open Space ‐‐ undisturbed, protected forest/open space or reforested land Managed Turf ‐‐ disturbed, graded for yards or other turf to be mowed/managed Impervious Cover RVDeveloped (watershed‐inch) with no Runoff Reduction* Managed Turf ‐‐ disturbed, graded for yards or other turf to be mowed/managed RVDeveloped (watershed‐inch) with Runoff Reduction* RVDeveloped (watershed‐inch) with Runoff Reduction* Impervious Cover Drainage Area A Managed Turf ‐‐ disturbed, graded for yards or other turf to be mowed/managed Managed Turf ‐‐ disturbed, graded for yards or other turf to be mowed/managed RVDeveloped (watershed‐inch) with Runoff Reduction* Drainage Area C Drainage Area D RVDeveloped (watershed‐inch) with no Runoff Reduction* Impervious Cover RVDeveloped (watershed‐inch) with no Runoff Reduction* Managed Turf ‐‐ disturbed, graded for yards or other turf to be mowed/managed Forest/Open Space ‐‐ undisturbed, protected forest/open space or reforested land Runoff Reduction Volume (ft3): Runoff Reduction Volume (ft3): Drainage Area B Forest/Open Space ‐‐ undisturbed, protected forest/open space or reforested land Drainage Area Curve Numbers and Runoff Depths* Curve numbers (CN, CNadj) and runoff depths (RV Developed ) are computed with and without reduction practices. Use NOAA Atlas 14 (http://hdsc.nws.noaa.gov/hdsc/pfds/)