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HomeMy WebLinkAboutItems 5_6 PPP 01-16-19 Operations Comm Meeting - P2-98 s w� -,� 'r * _ '�I� '`.- ��►S �L,.4 is - 46 OPP VAO 1 Primary Treatment Rehabilitation at Plant 2, Project No. P2-98 6/C-Side Interim Repair at Plant No. 2, Contract No. P2-986 Operations - - Presentation January • 2019 Presented by Rob Thompson rHE ...mow Emmiu- Plant 2 Site Plan P2-98 Project Area � ,Operations Center •l % ar it Okh �'',• , : ? Sty.. __ � � �� Q ,I,;� , �o Io .t P Major ro ec emen s I I ^� SOUTH SCRUBBER , • A B a n d C S i d e 1 COMPLEX DISTRIBUTION STRUCTURE A Primary Clarifiers NORTH SCRUBBER COMPLEX ( 14 tota I ) B SIDE ASIDE • Odor Control -- C SIDE DISTRIBUTION STRUCTURE B• Power Distribution00 • Utility Tunnels r _ AL -J: • Ya rd Piping DISTRIBUTION STRUCTURE C � A=Side PrimaryClarifiers Require Replacement • Built between 1960 and - 1963 • Portions of structures have severe corrosion • Failed clarifier mechanisms t • Subject to liquefaction in earthquake Y I, t.: t 0 Al PRIMARY :PRIMARY ` CLARIFIER P ,♦�'CLARIFIERO ��� '\ C ♦♦ mn B PRIENR/ PRIMARY ♦� - — CLARIFIER - CLARIFIER is - M N+ ..,. SfmPl KPRIMARY '♦ ) CLARIFIER PRIMARY PPoMARV' ♦♦� L' - \ CLAPoFIERK CLARIF16 IER) �o uuooEu Auumno ♦,♦;� _iT�I`` L rolL � PR-RY PRIMARY PP PRIMARY ,`. CLAPJFER L CLARIFIER 1 - CLARIFIER H 1 f^` mh i U PRIMARY CLARIFIERE r �S'.' r —■ • `.� CLARIFIER FAULT I OSOLIDS FAULT, �� ER L� '. ' DIGESTER) DIGESTER: 7: DIGESTER D� G. ` �Fy PRIMARY O CLARIFIER D ER M DIGESTER K OKESTER E�DIGESTER C ' " • a i e �F Z .0 RO� DIGESTERN-- 'DIGESTER H� DIGESTER F /'1`' CLARIFIER F t, CLA dFPRI�IER G f"" ` ► H• c OKSESTER R. ///��� r N CL 00 Q D Why Move the A=Side Clarifiers ? • Avoid construction over active fault. • Existing A-Side clarifiers remain available during construction — avoids delay of OCWD GWRS Expansion . • Frees larger area for future secondary process to replace aging Activated Sludge Plant B/C =Side Clarifiers Require Rehabilitation • B-Side built between 1967 and 1972 I f • C-Side built between 1983 and 1985 _ • Mild-to-moderate structural damage from corrosion • Corroded clarifier mechanisms and cover supports PHASED PROJECTS FACILITATES CONSTRUCTION P2-98A: Replace A-Side primary clarifiers; new odor control system and 2 -98A power distribution; and infrastructure Design Construction improvements P2.98B: Provide short- N N N N N N N N N term repairs (15-year life) o 00 ko o W Ln o for B/C-Sides primary Design Construction clarifiers P2-98C (now P2-133): vz -�MB Provide long- term repairs (+20 years) for B/C-Sides Construction starts 2029 primary clarifiers and new odor control system BIC =Side Interim Repair at Plant No. 2 Contract No. P2=9813 Major Contract Elements • Repair of cracks in concrete pipe and structural walls. • Repair of clarifiers' steel mechanism . • Lining of process piping . P2 =98B : Clarifier Concrete Repair I �/r"w"/yj, 71 11111 a I J_ n b PRIMARY CL4AIFIER tA .y . . - 140'DIA P2 =98Bm. Concrete Pipe Corrosion r 96-inch Concrete Pipe Repair 96-inch Concrete Pipe Repair Reinforcing steel exposure in crown Reinforcing steel exposure I _ Typical Mechanism A Aww .._ ............ �- =ram l �'( �'L.'., _ -t _ - r _ _ _f• P2 =9813 : Clarifier Steel Corrosion r � b I •' IW F' Structural steel around the center column (,A De-lamination it Dome supports at Clarifier P2 =98B Bid Results Bidder Amount of Bid Myers & Sons Construction, LLC $81665,000 Shimmick Construction Company, In $8,755,500 $101055,000 $11,365,426 Stanek Constructors, Inc. Abhe & Svoboda, Inc. Tharsos, Inc. $12, 151,406 Recommendation : PCSA • Approve a Professional Construction Services (PCSA) Agreement with Black & Veatch Corporation to provide construction support services for B/C-Side Primary Clarifiers Interim Repair at Plant No. 2, Contract No. P2- 98B, for a total amount not to exceed $549,534; and • Approve a contingency of $54,953 (10%) Recommendation : Construction Contract • Award a Construction Contract to Myers & Sons Construction, LLC for B/C-Side Primary Clarifiers Interim Repair at Plant No. 2, Contract No. P2-9813 , for a total amount not to exceed $8,665,000; and • Approve a contingency of $866,500 ( 10%) Questions ?.