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

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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


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SLIDE 1

We st Goshe n T

  • wnship

Sto rmwa te r Qua lity Pla ns

July 26, 2017

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SLIDE 2

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
  • E

r in L e tavic , M.E ng, P.E ., Pro je c t Ma na g e r

– 13 ye a rs MS4 e xpe rie nc e – e le ta vic @ hrg -inc .c o m

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SLIDE 3

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

  • m 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

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SLIDE 4

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

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SLIDE 5

T wo Stor mwate r Runoff Pr

  • ble 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?

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SLIDE 6

Sanitary Se we r Storm Se we r

(T re a te d) (Untre a te d)

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SLIDE 7

Stor mwate r Pollutants

  • Se dime nt
  • 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
  • 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

De lawar e Bay

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SLIDE 8

Impair e d Wate r she ds

  • Se dime nt
  • Nutrie nts

(nitro g e n & pho spho rus)

Chr istina Rive r & Goose Cr e e k (T

  • tal Maximum Daily L
  • ads)
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SLIDE 9

Pollutant Re duc tion Re quir e me nts

Goose Cr e e k T MDL (T

  • tal Maximum Daily L
  • ad)

Po lluta nt: Pho spho rus Re q uire d Re duc tio n: 54% (Pro te c tio n o f a q ua tic life )

Br andywine Cr e e k/ Chr istina Rive r T MDL (T

  • tal Maximum Daily L
  • ad)

Po lluta nt: Se dime nt Re q uire d Re duc tio n: 61% (Re sto re re c re a tio n a nd 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%

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SLIDE 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

– Ma pShe d So ftwa re Bic king Ba sin Re tr

  • fit
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SLIDE 11

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

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SLIDE 12

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
  • 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.

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SLIDE 13

2018 Pe rmit Re g ula tory Cha ng e s

Po llutio n Re duc tio n Plans (PRPs)

  • PRP Re quir

e me nt T able pro vide d in the dra ft pe rmit

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.

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SLIDE 14

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

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SLIDE 15

2018 Pe rmit Re g ula tory Cha ng e s

T MDL Plans

Cur r e nt Pe r mit

  • T

wo -pa rt T MDL Pla n

  • T

MDL Stra te g y with NOI / a pplic a tio n

  • T

MDL De sig n de ta ils due 1 ye a r a fte r pe rmit issua nc e

  • T

MDL Pla n re q uire d fo r a ll po lluta nts with a n “a pplic a b le WL A”

  • MS4 e lig ib le to b e

c o ve re d unde r PAG-13 2018 Pe r mit

  • One T

MDL Pla n

  • Nutrie nts/ se dime nt WL

A

  • T

MDL Pla n re q uire d

  • No t e lig ib le fo r PAG-13

pe rmit

  • WL

A fo r o the r po lluta nt (no t nutrie nts/ se dime nt)

  • T

MDL pla n no t re q uire d, PAG-13 re ma ins a n

  • ptio n
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SLIDE 16

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
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SLIDE 17

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

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SLIDE 18

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

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SLIDE 19

Short- te rm Se dime nt L

  • a d Re duc tion
  • Co mb ine d Pla nning Are a
  • F
  • c us pro je c ts within T

MDL wa te rshe ds

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SLIDE 20

Short- te rm Se dime nt L

  • a d Re duc tion
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SLIDE 21

Propose d Imple me nta tion Sc he dule

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SLIDE 22

L

  • ng - T

e rm Polluta nt L

  • a d Re duc tion
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SLIDE 23

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

  • val

Que stions?