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HomeMy WebLinkAboutItem 15 PPP Operations 09-06-17 - Ocean Outfall System Rehab Project No. J-117 Iwo 46 = r�'��•/•r•�~/III+I►�• '08 Rep `, iA -may--- _ _._ _- l . •R� Ocean Outfall System Rehabilitatio Project No . J - 117 �Ylow- tv� 1 � r � Ocean Outfall System Rehabilitation Project No . J =117 1 . J-117A Interplant Effluent Pipeline Rehabilitation Construction Contract Awarded June 2017 ($12.6 mil) 2 . J-117B Outfall Low Flow Pump Station ($76 mil ) • Rehabilitation Ocean Outfall Booster Pump Station • New Outfall Low Flow Pump Station • Replace Plant Water PS for GWRS Final Expansion Added • Power Distribution Switchgear Upgrades Nov2016 J-1176 is on critical path for GWRS Final Expansion startup Outfall Low Flow Pump Station , Contract No . J - 117B GWRS PS PLANT WATER PS C-D� LOW FLOW PS r ! � -�•. :.+. -� OCEAN OUTFAL TFQLL PIPELIry i 1 1 t 1 1 BOOSTER STATION Zllliltltllit _ � - % 4C 4 ■ tt :\,`` ��. !t REPLACE EXISTING ,. ; . PLANT WATERJIM — a PUMP STATION k , Lit m RECLAIMABLE FLOWS y NON-RECLAIMABLE FLOWS � �1 1 1 I � ern-rye ■ ( If Active au s Identified !P� 4 IL� - 1: �' -� ' PRIMARY F ♦'�. l _u_oxF q� CLARIFIEh V CLARIFIER G°F11FAD • 9 I ' Y♦ f TEx MIJ \ PRIMARY • 1 , CLARIFIER M 1 CLAPIIII—K xuaolxo , ;H L)'3 ' _�G GLARIFIERL GLARFEft [LARIF ERH ♦�' �xzaxE i: ��+x�G ,� °' '~,♦,�.ervereuv_one � �..h ' ^I. w�oxE � . •x< -P IEP E e � �f - DIGESTERS Fnx axcL R., A,� � EFpp DIGESTER XL DIGESTER DIGESTER I - .� DIGE F l� —ER—F C-1FAIE,C • !tl DIGESTER M DIGESTER Y 1IGEs.ER E ♦ DIGESTERC 1- 111 � sTen E � 4xx �.� m ♦,?' ryms 'I 5w p GEGTE O pIGESTER DID ES PR M IER - i4 CLARIF ER F C AR F ER G a >"-���.. � �•c ocEsreR v,�o es.Eft. �HL. V-';�'DIF +� L�ESTER G Ym x ♦ w oxc ni. � j1kk ------------ �.� �l' y l KLE/NFELOER Implications of Active Faults • An occupied structure may not be built on an active fault • Pump stations not considered occupied • Non-occupied structures allowed on faults, but more evaluation and design effort required • Approach is to avoid faults whenever practical P2-98: Location of New A-Side Clarifiers Changed to Avoid Fault L� _— - FAIERGFNCYGVJ{zEV7 O�fRFlOW —�_ - P2-98 Primary HEADWORKS ��IAfflE _ ~� � �� ODOR INIJ DIST X 8"DB CONTTO ( ) , Treatment FACILTY (2)5'(THROUGH TUNNEL) 24"FA(E) 4 Rehabilitation �p`'A"C• I I PRIMARY PRIMARY -48'FA \j CE�NWTERR CLARIFIER D CLARIFIER E 36"PI GENERATR)N Tl SLOG (4)5,(2)3"-1T x 2SL 24 FA(E) \� 36 PE - S. CLARFERYG ay JB 18 72"PI 0!" �54"PE 36"PE PCOTS&BLEACH V PRIMARY BEDS (2) !�'(THR LUGH ° CLARIFIER F FACILITY titi�M TUNNEL - 12'DR V 108'PE FLUENT DC'F _TERRIG �• OPTIONAL JB-15 TIE-IN JB-13 7NE45KW PH 12"DR 11 IIRE (16)3.(4)5'-32"x 32'DS --__ JB-12 -t 3"x 8"DB PCOTS& j \ PB1 r Wdus A-Side BLEACH _;r- I PRIMARY PRIMARY (10)3e1 a r i i e r Location FACILITY CLARIFIER CLARIFIER NORTH j H SCRUBBER COMPLEX 1 PRIMARY /�' �-- c _ ( _ _ x CLARIFIER % (4)3"-13"x 13"DB - B BID PRIMARY PRIMA Y PRIMARY - ))) DIGESTER a DIGESTER DIGESTER,, DIGESTER CLARIFIER CLARIF ER 1 CLARIFIER I) C F } G O K /J I (2)3"-13"x 8'DB DIGESTER DIGESTER DIGESTEPRIMARYR CLARIFIER (2)3'-13"x 8'DB I L H lug PKILIARV PRIMARY PRIMARY " �/� // CLARIFIER CIARIFIER _ CLARIFIER 1 N h1 I1 7 1 DiGES TFR DIGESTER DIGLSIEK It 3"-13"x 13"DB �� K� N Essca D C' No practical alternative for Low Flow Pump Station • Additional engineering required • Additional investigation to locate faults • Evaluation of siting alternatives • Soil modeling • Soil/Structure modeling • Structural redesign • Other design challenges • Physical modeling • Difficulties drilling test wells for dewatering • P2-107 Power Monitoring & Control Upgrades Coordination CEQA Documentation • Initial Study determined that all potentially significant environmental impacts can be mitigated • 30-day public review period closed on July 6 • Mitigated Negative Declaration has been completed in compliance with the requirements of CEQA Recommendations • Consider, receive, and file the Initial Study/Mitigated Negative Declaration and Mitigation Monitoring and Reporting Program for the Ocean Outfall System Rehabilitation, Project No. J-117, and Outfall Low Flow Pump Station, Contract No. J-11713, prepared by Brown and Caldwell and Environmental Science Associates; • Adopt Resolution No. OCSD 17-XX, making certain findings and adopting the Mitigated Negative Declaration and Mitigation Monitoring and Reporting Program pursuant to the California Environmental Quality Act; and • Approve a contingency increase of $677,801 (10%) to the Professional Design Services Agreement with Brown and Caldwell for Ocean Outfall System Rehabilitation, Project No. J-117, for a total contingency of $3,727,907 (55%).