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FOOTHILL ENGINEERING <br /> 12793 PADDY CREEK LANE LODI, CA 95240 <br /> 209/368-9381 fax 209/367-1163 <br /> PROJECT: PAN ELLA TRUCKING WASTE OIL TANK SECONDARY CONTAI NMENT <br /> DATE: 7/14/08, 8/13/08 Rev. 10/16/08 <br /> CONTAINMENT CHECK <br /> W:= 38.5 -2- .67 W=37.16 <br /> L:= 42-2 - .67 L=40.66 <br /> Agross:= W•L Agross = 1.511 x 103 SF <br /> Anet:= Agross—78.5- 3 — 50.24—28.26— 128 Anet= 1.069 x 103 SF WITH MISC. PIPING <br /> Ausable:= And— .10-Anet Ausable=962.033 SF SUBTRACT 10%OF Anet FOR PIPING <br /> GALperfoot:= 7.48 - Ausable GALperfoot= 7.196 x 103 GALS PER FOOT OF WALL <br /> CONTAINMENT WITH 3"OF FREEBOARD WITH 10,000 GAL SPILL <br /> CONTAINMENT:= GALperfoot- 1.75 CONTAINMENT= 1.259 x 104 GALS <br /> LARGEST TANK HIGHT OF FILL OF CONTAINMENT WITH TOTAL SPILL @ 10000 GAL <br /> 10000 <br /> Depth= 7.48 Depth = 1.39 FEET OF THE CONTAINMENT WITH 10000 GAL SPILL <br /> Ausable <br /> CONTAINMENT WITH RAIN <br /> gain 22.77 FROM 24 HR. 25 YR. GRAPH <br /> 12 <br /> Depth+ Rain= 1.615 FT <br /> CONTAINMENT WITH 24 HR RAIN AT 25 YRS IN (SEE ATTACHED GRAPH) 1.615 <br /> FEET OF DEPTH IN CONTAINMENT OK FOR SPILL PLUS RAIN <br /> RECAP OF CALCULATIONS REV#2 <br /> TOTAL AREA:= 1511 SF <br /> TANK AREA= 440 SF ALL TANKS <br /> USEABLE AREA:= TOTAL AREA—TANK—AREA USEABLE—AREA = 1.071 x 10 SF WITH PIPING <br />