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SMALL AREA EXEMPTION 12 <br />MATERIAL STORAGE AREA NEAR EAST OF OLD POWER PLANT <br />SOIL TYPE PROGRESSO LOAM - C <br />DISTURBED NEARLY BARE <br />DATA SUMMARIZED FROM SEDCAD OUTPUT <br />STORM INFORMATION <br />Stone Type: NRCS Type II <br />Design Storm: l0 yr-24 hr ~~~p RECIy`••~, <br />..... <br />Rainfall Depth: 1.8 inches / Q~ .. . a <br />Particle Size Distribution %,~~ ~~~~~" _ ' , e <br />Silt Loam ~ •Q ~• *~ <br />Ps A'1 sAE-iz i*= 19230 <br />SAE 12 • : ~ <br />Size (mm) In out ~ ~/2!d-' O~•~W' <br />4.7600 100.00°/ 100.00°h ~Q.~e~ ~~• ~~ ~ <br />1.0000 96.00% 100.00% ~F eaa...a• ~V.• <br />13 a.woo 91.00% loo.oo% ~:~~NAI. ~(,• <br />0.2500 a7.oo% loo.ao°~ ~~~~• <br />27 0.0630 62.00°b 100.00% <br />0.0160 60.00% 100.00% <br />[/ ~ 0.0040 33.00% 67.09% <br />STRUCTURE SUMMARY <br />Immediate Total Peak Total Peak Peak <br />Contributing Contributlng Discharge Runoff Sediment Settleable <br />Area Area Volume Sediment Conc. Conc 24 VW <br />(ac) (ac) (cfs) (aae-R) (tons) (mg/1) (ml/I) (mUl) <br />• SAE-12 IN 0.50 0.50 0.43 0.03 0.90 37,782 14.74 8.46 <br />OIIT 0.40 0.03 0.30 14 341 0.37 0.21 <br />STRUCTURE DETAIL <br />Fence Width Land Te-back Peak Peak Dewater Trap <br />Flow Rate Along Xeight Slope Distance Fence Water Tme Effidency <br /> Contour Stage Stage <br />(9Pm/sq R) <ft) (~) (%) (R) (R) (R) (days) <br />SAE-12 10 15 2.5 2 N/A 0.47 0.47 0.29 62.11°k <br />SUBWATERSHED HYDROLOGY DETAIL <br />SWS SWS Tme Curve UHS Peak Runoff <br /># Area of Musk K Number Discharge Volume <br /> Conc. <br /> (at) (hrs) (cfs) (arft) <br />SAE-12 1 0.50 0.10 0 87.6 TR55 0.43 0.03 <br />SUBWATERSHED SEDIMENTOLOGY DETAIL <br />SWS SOIL Sediment Peak Peak 29VW <br /># K L S C/P PS# Sediment SeWeable <br /> Conc. Conc. <br /> (R) (%) (tons) (mg/I) (ml/I) (ml/I) <br />SAE-10 1 0.32 200 2 1 / 1 1 0.90 37,782 14.74 8.% <br />TR-29 Exh-8 - 197 - 8/28/03 <br />APPRoI.'`O to /jo /03 <br />