Ke a la ke he 1 WWT P R- 1 Upg r a de Proje c t WE ST HAWAII - - PowerPoint PPT Presentation

Ke a la ke he WWT P R- 1 Upg r a de Proje c t

WE ST HAWAII F ORUM

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Ag e nda

 Proje c t ove rvie w  Wa te r re c yc ling upg ra de s  Disposa l syste m upg ra de s

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Ke a la ke he WWT P Ba c kg r

• und

 WWT

P for Ka ilua - Kona

 Ae ra te d la g oon syste m  Construc te d e a rly 1990s  5.3 million g a llons pe r da y ultima te c a pa c ity  Curre nt flows a re a bout 1.7 million g a llons pe r da y  Home for e nda ng e re d birds

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Ha wa iia n Stilt

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Ha wa iia n Coot

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Curre nt Construc tion Proje c t

 Ae ra tion syste m upg ra de  Sludg e re mova l  Re pla c e 3 of 5 la g oon line rs  Comple tion this spring

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Wa te r Re c yc ling

 Be ne fic ia l use of hig hly tre a te d WWT

P e fflue nt for non- pota ble use s

 Irrig a tion  Constr

uc tion dust c ontr

• l

 Industr

ial use

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Wa te r Re c yc ling Cha lle ng e s

 L

a va fie lds – no soil

 Hig h pipe line insta lla tion c ost  L

a c k of pote ntia l use rs c lose by

 Re c yc le d wa te r sa linity

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F uture Sc he ma tic – R- 1 T re a tme nt - Disposa l

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Why We Ne e d a Disposa l Syste m

 DOH re quire me nt for R- 1 c e rtific a tion  Some whe re for off- spe c wa te r to g o  Some whe re for e xc e ss wa te r to g o  Supply vs. de ma nd

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R- 1 T r e a tme nt – F

• r

Disposa l

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R- 1 Initia l De ma nd E stima te s

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R- 1 Buildout De ma nd E stima te

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Re use Pla n - Ultima te

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Ne w Ke a la ke he WWT P Disposa l Syste m

 Sig nific a ntly re duc e nutrie nts

 Polishing we tla nds  Soil a quife r

tr e a tme nt syste m

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Disposa l Syste m

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Polishing We tla nds

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Polishing We tla nds

 Provide s a dditiona l tre a tme nt  Nutrie nt re mova l

 >90% N re mova l  Some P re mova l

 Me ta ls re mova l  T

ra c e org a nic c ompound re mova l

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Subsurfa c e F low Construc te d We tla nd

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Sma ll Subsur fa c e F low We tla nd on Moloka i

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Soil Aquife r T re a tme nt (SAT )

 USE

PA re c og nize d form of la nd tre a tme nt

 Re moval of:

 BOD a nd T

SS

 Pa thog e ns  Nutrie nts  Me ta ls  T

r ac e or ganic c ompounds

 E

ndoc r ine disr upting c ompounds

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Ke a la ke he Re g iona l Pa rk Ma ste r Pla n - SAT

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A` a L a va

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SAT Conc e pt

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SAT Me dia Inve stig a tions

 All ma te ria ls te ste d ha ve hig h P a dsorption

c a pa c ity

 Blue roc k sa nd a nd c rushe d na tive ma te ria l be st

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SAT Me dia Inve stig a tions

 E

xc e lle nt P re mova l in SAT a ntic ipa te d

 >90% P r

e moval

 4 foot me dia de pth provide s ~ 40 ye a r life

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Combine d Be ne fits – Re c yc le d Wa te r Use a nd Nutrie nt Re mova l

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Combine d Be ne fits – Re c yc le d Wa te r Use a nd Nutrie nt Re mova l

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Curre nt E fforts

 Pre limina ry de sig n ta sks/ studie s  Community outre a c h  E

nvironme nta l impa c t sta te me nt

 E

IS Pre pa ra tion Notic e publishe d~April 3, 2017

 E

ISPN sc oping me e ting Apr il 6, 2017

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Ce sspools - Ha wa ii

 Ce sspools in Sta te of Ha wa i'i = ~90,000  Ha wa ii County = ~50,000  Ha wa ii is the only Sta te tha t still a llows ne w

c e sspools to be c onstruc te d

 Sta te c onte mpla ting c losur

e of a ll c e sspools by 2050 HB No. 1244, HD1, SD2

 In c onfe r

e nc e

 All c e sspools upgr

ade d to Se ptic or Ae r

• bic syste m

July 1, 2050

 L

e gitimate r e asons allowe d not to upgr ade

 F

inanc ial suppor t pr

• vide d

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F uture Issue s

 How to upg ra de syste ms

 Se we r/ Ae robic / Se ptic / Othe r

 e .g ., Composta ble T

• ile ts

 Gre y wa te r disposa l  Cost

Disc ussion/ Que stions

 Willia m Kuc ha rski, Dire c tor DE

M

 Willia m.Kuc ha rski@ha wa iic ounty.g ov  808.961.8083

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