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      "context_excerpt": "[OCR image]\nFigure 2-1: Schematic of Lot with Connected Impervious Areas\n\n# Reduction of Runoff Volumes Due to Reduced Impervious Surfaces\n\nNote: The computations were done by evaluating the runoff from the pervious and the impervious areas separately, and summing the volumes.\n\n# Example A\n\nGiven: A 32670 sf lot with 27470 sf lawn, HSG \"B\", CN = 61, 5200 sf impervious surface, CN = 98. No impervious cover is discon",
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      "context_excerpt": "[OCR image]\nFigure 2-2: Schematic of Lot with Connected and Unconnected Impervious Areas\n\n# Changes in Runoff Volumes Due to Disconnection of Impervious Surfaces\n\n# Example C\n\nGiven: A 32670 sf lot with 29870 sf lawn, HSG \"B\", CN = 61, 2800 sf impervious surface of total impervious area, CN = 98.\n\n2000 sf of impervious area discharges to 8900 sf of lawn, and 800 sf impervious area is directly connected\n\n$\\mathrm{P}",
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      "context_excerpt": "[OCR image]\nFigure 2-3: Schematic of Existing Lot and Standard Development Lot\n\n# Comparison of Changes in Runoff Due to Low Impact Development Techniques\n\n# Predeveloped Condition\n\n0.75 acre lot\n\n20,650 sf woods, HSG \"B\"\n\n12,020 sf woods, HSG \"C\"\n\n$\\mathrm{P}_2 = 3.3$  inches,  $\\mathrm{P}_{10} = 5.2$  inches, and  $\\mathrm{P}_{100} = 7.5$  inch\n\n$\\mathrm{Tc} = 0.52$  hours\n\n125 If sheet flow,  $1.3\\%$  slope,  $\\",
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      "context_excerpt": "[OCR image]\nFigure 2-4: Schematic of Lot With LID Techniques\n\n# Postdeveloped Condition (With LID Techniques)\n\n0.75 acre lot, 2800 sf of total impervious area\n\n800 sf of impervious area, directly connected,  $\\mathrm{Tc} = 0.1$  hours\n\n2000 sf of impervious area, unconnected, discharging to 8906 sf of lawn\n\n$\\mathrm{P}_2 = 3.3$  inches,  $\\mathrm{P}_{10} = 5.2$  inches, and  $\\mathrm{P}_{100} = 7.5$  inch\n\nNonstruc",
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