PERMFILE71056

• Permit No: C1981012
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 19 MISC DRAINAGE SUPPLEMENT PART 3
• Media Type: D
• Archive: No

Civil Software Design -- SEDCAD+ Version 3.1
Copyright (C) 1987-1992. Pamela J. Schwab. All rights reserved.
Company Name:
Filename: C:\SCAD\DT\B;
Date:
SAE DEMO FOR CONTAMINATED
Storm: 3.40 inches, 25
Hydrograph
Greystone Development Consultants
>,SIN\OILTSSAE User: C.W. BEGEJ
10-15-1993 Time: 12:13:06
TOPSOIL AWAITING REMEDIATION-25-YR 24-HR BRM
year-24 hour, SCS Type II
Convolution Interval: 0.1 hr
SUBWATERSHED/STRUCTURE INPUT/OUTPUT TABLE
-Hydrology-
JBS SWS Area
(ac)
--------------------------
--------------------------
111 1 0.02
Type:
111 Structure 0.02
Base- Runoff Peak
CN UHS Tc K X Flow Volume Discharge
(hrs) (hrs) (cfs) (ac-ft) (cfs)
----------------------------------------------------
----------------------------------------------------
82 M 0.004 0.000 0.000 0.0 0.00 0.04
Null Label: CONTAM SOIL SAE
0.00
111 Total IN/OUT 0.02 0.00 0.04
f~J
Contaminated soil will be consolidated into a circular pile with a radius
less than or equal to 17'. and a perimeter of 107'. A triangular ditch with 2.5:1 an.'
3:1 sideslopes will contain .00378 ac-ft of storage with a depth of 0.75'.
The berm will be 1.75' to allow 1' of freeboard to ensure compliance with Rule
4.05.6(11)(e). Specific calculations follow.
The dirt pile requires 0.0028 acft of storage from the following calculation:
3.4" of precipitation generates 1.7" runoff/inch precipitation at a CN of
82.
_ 1.-7"/12" x .02 acres =-0.02833 ac-ft ~ _ __ _---
The ditch at 0.75' depth holds 0.00378 ac-ft.
0.5 x 4.125' (top width) x 0.75' (depth) x 107' (perimeter) = 0.00378 acft
43560ft2/acre
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