Sto rmwa te r Qua lity Pla ns July 26, 2017 He rbe rt, Rowla nd - PowerPoint PPT Presentation

We st Goshe n T ownship Sto rmwa te r Qua lity Pla ns July 26, 2017

He rbe rt, Rowla nd & Grubic , Inc . He a dq ua rte re d in Ha rrisb urg , PA • +200 e mplo ye e s • Munic ipa l se rvic e s fo r +50 ye a rs • ., Pro je c t Ma na g e r E r in L e tavic , M.E ng, P.E • – 13 ye a rs MS4 e xpe rie nc e – e le ta vic @ hrg -inc .c o m

MS4 Pe r mit NPDE S (National Pollutant Disc har ge • E limination Syste m) Ge ne r al Pe r mit (PAG- 13) or Individual Pe r mit (IP) for Stor mwate r Disc har ge s fr om Small Munic ipal Se par ate Stor m Se we r Syste ms (MS4s) – WAT E R QUAL IT Y PE RMIT – Stor mwate r r unoff c ar r ie s pollutants

MS4 (Munic ipa l Se pa r a te Stor m Se we r Syste m) T he syste m within the “ Urb anize d Are a” tha t c o lle c ts, c o nve ys, o r ma na g e s sto rmwa te r Pipe s • I nle ts • Swa le s • De te ntio n BMPs • I nfiltra tio n BMPs • Wa te r Qua lity BMPs • Outfa lls – Go o se Cre e k, Christina Rive r, E a st Bra nc h • Che ste r Cre e k, Che ste r Cre e k

T wo Stor mwate r Runoff Pr oble ms E c o no mic Pro g re ss (la nd de ve lo pme nt) • – Pro b le m # 1: I nc re a se in quantity – Pro b le m # 2: De c re a se in quality Ag ing I nfra struc ture • – Pro b le m # 1: F unding c ha lle ng e s – Pro b le m # 2: Wha t de sign sta nda rds?

Sanitary Se we r Storm Se we r (T re a te d) (Untre a te d)

Stor mwate r Pollutants Se dime nt De lawar e Bay • Nutrie nts (nitro g e n & • pho spho rus) Ba c te ria • Oxyg e n De ma nd • Oil a nd Gre a se • Me ta ls • T o xic Che mic a ls • Chlo ride s • T he rma l I mpa c ts • Pe stic ide s & He rb ic ide s •

Impair e d Wate r she ds Chr istina Rive r & Goose Cr e e k (T otal Maximum Daily L oads) Se dime nt • Nutrie nts • (nitro g e n & pho spho rus)

Pollutant Re duc tion Re quir e me nts Br andywine Cr e e k/ Chr istina Rive r T MDL Goose Cr e e k T MDL (T otal Maximum Daily L oad) (T otal Maximum Daily L oad) Po lluta nt: Se dime nt Po lluta nt: Pho spho rus Re q uire d Re duc tio n: 61% Re q uire d Re duc tio n: 54% (Re sto re re c re a tio n a nd (Pro te c tio n o f a q ua tic life ) pro te c tio n o f a q ua tic life ) Che ste r Cr e e k/ E ast Br anc h Che ste r Cr e e k PRP (Pollutant Re duc tion Plan) Po lluta nt: Se dime nt Re q uire d Re duc tio n: 10%

T MDL Pla n De ve lopme nt Pre vio usly de ve lo pe d in • 2015 Upda te d in 2017 • – Ne w MS4 Re q uire me nts – E a st Bra nc h Che ste r Cre e k/ Che ste r Cre e k I mpa irme nt – Upda te d stre a m re sto ra tio n c re dit Mo de ling • Bic king Ba sin Re tr ofit – Ma pShe d So ftwa re

2018 Pe rmit Imple me nta tion  Pe rmitte e s a re automatic ally e xpe c te d to c omply with la te st pe rmit te rms.  Po llutio n Co ntro l Me a sure s (PCMs)  Upda te d list o f a utho rize d no n-sto rmwa te r disc ha rg e s  I nc re a se d pub lic invo lve me nt  Cle a re r re q uire me nts re q uiring pub lic a c c e ss  Upda te d T MDL a nd ne w Po lluta nt Re duc tio n Pla ns

2018 Pe rmit Re g ula tory Cha ng e s Po llutio n Re duc tio n Plans (PRPs)  PRP re q uire me nt e xte nde d to a wide r g ro up o f MS4s.  PRPs re q uire d fo r a ll wa te rs impa ire d b y nutrie nt o r se dime nt lo a ding s tha t do no t ha ve a T MDL .  Just ha ving a pla n is no t e no ug h; the pla n ne e ds to b e imple me nte d in a de mo nstra tive wa y.  Pro je c t imple me nta tio n in a 5-ye a r pe rio d – c o mple tio n b y 2023.

2018 Pe rmit Re g ula tory Cha ng e s Po llutio n Re duc tio n Plans (PRPs)  PRP Re quir able pro vide d in the dra ft pe rmit e me nt T ide ntifie s spe c ific re q uire me nts re la ting to re me dia tio n o f impa ire d wa te rs (pre -T MDL ).  T he se re q uire me nts g o above and be yond imple me nta tio n o f the MCMs a s pa rt o f a n MS4’ s sto rmwa te r ma na g e me nt pro g ra m.

2018 Pe rmit Re g ula tory Cha ng e s PRP Re quir e me nts T able  Se le c tio n o f impa ire d wa te rs inc lude d o n T a b le • 5-mile b uffe r dra wn a ro und e a c h munic ipa lity’ s urb a nize d a re a (UA) • Dra ina g e a re a s de line a tio n within the b uffe r • I f sto rmwa te r fro m UA wa s e xpe c te d to flo w into impa ire d wa te rs within the b uffe r, impa ire d wa te rs we re se le c te d fo r the T a b le

2018 Pe rmit Re g ula tory Cha ng e s T MDL Plans Cur r e nt Pe r mit 2018 Pe r mit  T  One T wo -pa rt T MDL Pla n MDL Pla n • T MDL Stra te g y with  Nutrie nts/ se dime nt WL A NOI / a pplic a tio n • T MDL Pla n re q uire d • T MDL De sig n de ta ils due • No t e lig ib le fo r PAG-13 1 ye a r a fte r pe rmit pe rmit issua nc e  T MDL Pla n re q uire d fo r a ll  WL A fo r o the r po lluta nt po lluta nts with a n (no t nutrie nts/ se dime nt) “a pplic a b le WL A” • T MDL pla n no t re q uire d, PAG-13 re ma ins a n  MS4 e lig ib le to b e o ptio n c o ve re d unde r PAG-13

T MDL Pla n De ve lopme nt Mo de ling • – Ma pShe d So ftwa re – Po lluta nt lo a ding a ssumptio ns a c c o rding to la nd use & instre a m e ro sio n – BMP b e ne fits • De te ntio n b a sin na tura liza tio n • Stre a m b uffe rs

T MDL Pla n De ve lopme nt De te ntion basin • natur alization Stre a m • re sto ra tio n/ b uffe r

T MDL Pla n De ve lopme nt De te ntio n b a sin • na tura liza tio n Str e am • r e stor ation/ buffe r

Short- te rm Se dime nt L oa d Re duc tion Co mb ine d Pla nning Are a • F o c us pro je c ts within T MDL wa te rshe ds •

Short- te rm Se dime nt L oa d Re duc tion

Propose d Imple me nta tion Sc he dule

L ong - T e rm Polluta nt L oa d Re duc tion

Ne xt Ste ps Public c omme nt pe r iod c lose s August 25, 2017 • Re vise r e por t Se pte mbe r 2017 • Submit r e por t Se pte mbe r 15, 2017 • Imple me ntation – upon Individual Pe r mit Appr oval • Que stions?