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STORM WATER QUALITY TABLE <br />*'IS IN UEU 10TAL AREA IMPERVIOUS PERVIOUS •TREA TIJENT MINIMUM IMP IMP SIZE SIZING RATIO NAME '(SQFT) SURFACE (SQFT) SURFACE {SQFT} AREA {SQFT} SIZE {SQFT} PROVIDED (SQFT) (X) TREATMENT <br />REQUIRED? <br />OMA 1 J0,575 27,450 3.125 27,760 1,110 1,258 4.5JX NO <br />OMA 2 25,805 23,940 1,865 24,125 965 1,080 4.48X NO <br />OMA J 8,205 5,190 3,015 5,490 220 0 o.oox >fS <br />DUA 4 7,885 7,570 Jl5 7,600 J04 Jl5 4.14X NO <br />OMA 5 5,500 5,500 0 5,500 220 0 o.oox >fS <br />•lREATMENT AREA IS EQUAL TO IMPER"10US SURFACE AREA + 10:1 PER'i10US AREA <br />*'NOTE FOR IN LIEU TREATMENT {SWAP METHOD): MIER£ IN UEU TREATMENT IS REQUIRED, EXISTING IMPERVIOUS SURFACE AREA llfll 8£ TREATED ELSEMIERE ONS/TE. <br />SEE IN UEU TREA TIJENT TABLE. <br />IN LIEU TREATMENT TABLE <br />NEW IMPERVIOUS AREA NEEDING IN EXISnNG IMPERVIOUS AREA NAME LIEU TREA TMENT {SQFT) BEING TREATED {SQFT) <br />DMA 1 0 0 <br />DMA 2 0 20,350 <br />DMA 3 5,490 0 <br />DMA 4 0 0 <br />DMA 5 5,500 0 <br />TOTAL 10,990 20,350 <br />NOTE: 20,350 SQFT OF EXISTING IMPERVIOUS SURFACE WITH BE TREATED IN LIEU <br />OF 10,990 SQFT OF NEW IMPERVIOUS SURFACE THAT IS UNTREATED. <br />NOTES: <br />1. PERF PIPE SHALL BE GRADED TO DRAIN TOWARD OUTLET AT A MINIMUM SLOPE OF O.SX <br />2. BIO-RETENTION PLANTERS SHALL CONFORM TO THE GUIDEUNES SET FORTH IN THE ALAMEDA COUNTY . <br />C.J STORMWATER TECHNICAL GUIDANCE MAY 2, 2016 A HANDBOOK FOR DEVELOPERS, <br />BUILDERS AND PROJECT APPUCANTS VERSION 5.1 <br />J. BIO-RETENTION SOIL SHALL ACHIEVE A LONG TERM INFILTRATION RATE OF AT LEAST s· PER HOUR. <br />BIO-RETENTION SOIL SHALL ALSO SUPPORT VIGOROUS PLANT GROWTH. <br />lc ifyof-.. --~~ A clear copy can be viewed at: <br />San Leandro, 835 East 14th Street, City Hall, <br />San Leandro, CA 94577 <br />"' "' C/l '° o:> E-< .... Cll I z 0 .,., "" N °' 0 I '° 0 °' '° .... 0 <br />I < N .... 0 <br />~. ~ z I c..> < >< i:tl <br />C/l "" i:tl g <br />~ : {fl E-; ~ zu:i 0 <br />I o E=: ~ ~ ..... ~ c..> <br />: ~ <11 <br /><~ <br />~~ <br />1-1 ~ ~ ~ u0 ~ ~~ 0 <br />I>: <br />"" :><: < H 3 ~ u~ <br />p:: ~' <br />C/l <br />"''' "' O"' en z ~to <br />-I I <br />.!;! !;/ <br />V) N N <br />a::~~ O"'"' >-~ ~ <br />w~~ >. >< <br />r ~~~ I Vl a. <br />S2 <Id.,, iri <br />o::Vl&~ ~f5c.2 <br />w ~ ~ ~ 58~ z i (.J <br />0::: w =,; 0 ~ <br />w :::!~ E -> lO:;; ~ ure~ ...-