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i <br /> Ho�c docs Slnrmcep�nr"'�1'm•k? <br /> I Stoimccptor can bc dividcd into two componcnts: <br /> • Lowcr Ircauncnt chamber <br /> � • Upper bY-pass chambcr <br /> I <br /> Stomiwatcr 11ows into thc bypass ch2mUcr via thc stonn drain pipc. l,ow Oows arc divened into thc <br /> ! trcalmcnt cl�ambcr by a wcir and drop p�pc arrangcmcuL Tltc trca(ntenl chambcr fs ahvays full of��-atcr. <br /> Nntcr flows up thi���,;;h thc.ouUct pipe b,ised on Ihc head at ihe inle� wcir, and is dischargcd back into thc <br /> hy-pass chamber downstrcam of ihe wcie The Jo�ensircam sec�ion of the by-pass chamber is connecred <br /> ( to tlic oullG sionn drainpipc. <br /> Prec oils and other liyuids lighter Ihan waler will rise in the trcaimen! chamber ;md become entrapped <br /> , bcnca�h thc fibcrglass inscrt sincc lhc oulicl pipc is suUmcrgcd. Sedinunl will sculc to thc bottom of thc <br /> I chainbcr by gravity. "Iltc circular dcsign of ihc (rcatmcnt chambcr is critical to prevcnl iurhulcnt cddy <br /> cmrcnts and tu promotc scttling. <br /> Duiing high (low condilions, stomiwalcr in thc by-pass dmmbcr �vill Ilu�t uvcrtop of tiie ��cir and bc <br /> conveycd lo thc oudcl stonn drain dircctly. Watcr ihal ovcrllows thc wcir crealcs a backwatcr cffecl on <br /> thc ouqct pipc(hcad stabiliia�ion belwccn lhc inlM drop pipe and outicl nscr pipc) cnswing lhat cxccssive <br /> � Oow will nui bc forccJ into the Irc:atmcnt chantbcr, wliich conld scour or rc-suspcnd !hs sd�lcd matcrial. <br /> 7hc by-pass is an inlcgral pan of Stonnccptor sincc othcr oil/grit scparatnrs ha�c becn notcd w scour <br /> dunng high Iluw conditions(Schucicr and Shcpp, 1993). <br /> Slurmccptnr 11ud�lx and Idc�tlilicalion <br /> Stunnccp(or is available in both concrctc and fibcrZtlass. 'Phcrc arc cun'ciply ninc diffcrcnt sir.cs :n�ailablc. <br /> A concrctc S�onnccptor is dcnotcd by S'PC (c.g. S'CC6000) prcccding thc mudcl numbcr. A libcrgloss <br /> Stonnccpior is dcnoted by S'I'A(c.g. S'I'AG0001 prcccding Ihc modcl numbcr. <br /> In llic concrctc Stonnccptar, a fibcrglass inscrt scparales Ihc trcattncnt chamhcr Gom �hc by-pass <br /> i chambcr. 'I'hcre is threc insen dccigns: Ihe"spoal", the "disc"and thc"inlet". 7hc cGffercnt insert designs <br /> are illusiralcd in l�igures 1, 2 and 3. "1'hesc designc are casily dislinguishable from hic surfacc oncc fhc <br /> covc;has bccn removcd, ln thc"spool"dcsign you �eill scc onc largc 914 mnt (36")opcning in the ccntcr <br /> of thc inscrt with (wo 200 nnn (A") inspcetion ports loc:iled ciihcr vcnically on tlic sidcs of thc 914 nun <br /> (?G") opcning or horizontally on cithcr sidc of ihc opcnine. 'llicrc aro thrcc ccisions of thc in-linc disc <br /> inscn: "sinLlc inlcVuutlet", "muluplc inlcP' aud "sulmicrgcd". In thc "disc" dc.aign you will bc ablc to sce <br /> thc inlct pipc, tlic diop pipe opcninq m thc lowcr chambcr,thc orir, a 150 mm (6")oil inspcctioiiicicanout <br /> P�P�. a largc 610 mm (24") riscr p�pc-cpcning offscl ou thc ouqct side of thc slnicturc,.md thc outict pipc <br /> lic�in the miit. 'I hc wcir«�ill be around fhc 610 nnn (24")ouUr.t pipe on thc "nwhiplc in1G"disc inscrt. 7'he <br /> ��.ibmcrgcd" disc inscit has a liighcr wcir and a sccond inlct drop pipc. ]n ihc"inlef' dcsign ymi will bc <br /> — _— — — — — — Sternicep�or <br />