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 1 WWT P R- 1 Upg r a de Proje c t WE ST HAWAII F ORUM

Ag e nda 2  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 4 Ba c kg r ound  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

5 Ha wa iia n Stilt

7 Ha wa iia n Coot

Curre nt Construc tion 9 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

Wa te r Re c yc ling 10  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 ol  Industr ial use

Wa te r Re c yc ling 11 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

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

Why We Ne e d a Disposa l 13 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

14 Disposa l or e a tme nt – F r R- 1 T

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

16 R- 1 Buildout De ma nd stima te E

17 Re use Pla n - Ultima te

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Ne w Ke a la ke he WWT P 19 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

20 Disposa l Syste m

21 Polishing We tla nds

Polishing We tla nds 22  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

23 Construc te d We tla nd low Subsurfa c e F

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

Soil Aquife r T re a tme nt 25 (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

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

28 a va A` a L

29 Conc e pt SAT

SAT Me dia Inve stig a tions 30  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

SAT Me dia Inve stig a tions 31  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

Combine d Be ne fits – 32 Re c yc le d Wa te r Use a nd Nutrie nt Re mova l

Combine d Be ne fits – 33 Re c yc le d Wa te r Use a nd Nutrie nt Re mova l

Curre nt E fforts 34  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 38  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 obic syste m July 1, 2050  L e gitimate r e asons allowe d not to upgr ade  F inanc ial suppor t pr ovide d

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F uture Issue s 40  How to upg ra de syste ms  Se we r/ Ae robic / Se ptic / Othe r  e .g ., Composta ble T oile 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