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HomeMy WebLinkAboutPPP Operations 09-05-18 - Ocean Outfall System Rehab Project No. J-117 Iwo 46 = r�'��•/•r•�~/III+I►�• r� -may--- _ _._ -_ l`Y ` •R�rp 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 • Power Distribution Switchgear Upgrades Added Nov 2016 -T 3 . P2-107 SCADA System and Network Upgrades Ocean Outfall System Rehabilitation, Project No. J -117 2.2 PLANT WATER PS LOW FLOW PS9CE us • • AN014FQIL OCEAN OUTFALL �.: __ PIPELINE BOOSTER STATION (OOBS) REHAB .,- , REPLACE . ,llltllllllil - CEN GEN ELECTRICAL < y - '■.. .. jrt % \•`; ` �. � , •' ' ;ice ' � •� f REPLACE EXISTING PLANT WATER _ a PUMP STATION r Lit m RECLAIMABLE FLOWS _ y NON-RECLAIMABLE FLOWS �} r � �1 1 1 I � ern-rye ■ ( f Load S WEATHERDR17W'EATHER WET TOTAL LOAD 7 MW 10-13 MW CEN GEN CAPACITY 4-6 MW g MW LOAD SHEDDING METHODS: CEN GEN OVERLOADED ON ' CONTINGENCY BASED (EVENT DRIVEN) POWER IMPORTED 1-3 MW 1-4 MW UTILITY POWER OUTAGE ' BACKUP FREQUENCY PARTIAL TRIPPING Standby Standby LOADS WITH OF DOWNSTREAM STANDBY POWER LOADS (TYPICAL) Generators ��� Generators Ocean Outfall (TYPICAL) Pump Station Headworks Effluent Pump Station Primary Annex Clarifiers PLANT PRIMARY POWER SOURCES City Water OOOOOO Activated Pump Station Sludge Utility Central Generators Standby it (5) 3 MW, (1) 1 MW Generators Centrifuges Trickling Filters Gas Compressors NON-CRITICAL /Primary Effluent Digesters Standby LOAD Pump Station Generators ■ Adopting. Latest Substation Technolog, y LOAD SHEDDING CONTROLLER I MEDIUM-VOLTAGE SWITCHGEAR VIRTUAL MAIN ■ /L I I _. I ARC-FLASH PROTECTION I I ADOPTING THE LATEST I GOOSE SUBSTATMNAUTOMATION I MESSAGING I - TECHNOLOGY: IEC 61850 WITH GENERIC OBJECT ORIENTED I I 12KV-480VTRANSFORMER SUBSTATMON EVENT raa I I I I - - - - - - _ VIRTUAL MAIN REDUCES ARC FLASH �;+ s LOW-VOLTAGE SWITCHGEAR Plant 2 - 12kV Electrical System 12KV SERVICE CENTER SWITCHGEAR WITH LOAD SHEDDING . — . Bus A — . . . . . . . . . . . . . . . . . .Bus B — J P2-107 CENTRAL GENERATION SWITCHGEAR r - • • - - - • - • - - • - - • - • - - - • - - - - Bus L fEF4LUENT Bus G1 — — Bus G1 Bus B TRIBUTIONCENTER C OOBS J-117B usA Bus BI PUMP STATION ANNEX . — . sA — . — — —Bus . _ I DC `BLJACTIVATED SLUDGE � . — . —Bus A Bush - - - - - - - - I DC `H' (HEADWORKS) Bus I Bus B P2-107 DC`J'.(TRICKLING FILTERS r - - - - - - • - - - - - - s B � . — . _ BusA B_ — . . . . . . . . . . . . . . . . . . . . . . . . . . . I DC `K' (CENTRIFUGE) BusA Bus 6 Other Benefits of Combining Projects: Similar work, IT room in OOBS, concurrent schedule, and reduced soft costs. J =11713 and P2 =107 Plant 2 Site Plan T T - OTT , iL . . r7, 74* e 1 �.i e '•� 1, �`+ -- ��,_a�',,. ,;ham. � -�� .`� �. ■ • : • •,h�% -v Recommendations • Approve a contingency increase of $474,461 (7%) to the Professional Design Services Agreement with Brown and Caldwell for Ocean Outfall System Rehabilitation, Project No. J-117, for a total contingency of $4,202,368 (62%).