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Home My WebLink AboutP1-100 Ops Presentation 12-03-2014 SLUDGE DIGESTER REHABILITATION AT PLANT NO . 1 Project P1- 100 December 3, 2014 Orange County Sanitation District CIP - Cumulative Change Order Rate 6.50% 6.00% u 5.50% 0 5.00% U 4.50% nz m 0 4.00% 3.62% a, 3.50% a 3.00% 2.50% 2.00% Ob O� ti0 titi yL tip' ti� tih O� 04' Fiscal Year Current Orange County Sanitation • for you. Rehabilitation of Anaerobic Digesters r _ A kk • 2 Digesters Plant No . 1 Digesters Before P1-100 & P1-101 Projects PRIMARY CLARIFIER DIGESTER BELT FILTER PRESSES CAKE CAKE © STORAGE LOADOUT DISSOLVED AIR SECONDARY FLOTATION CLARIFIER THICKENERS After P1-100 & P1-101 Protects !! PRIMARY THICKENING f CLARIFIER CENTRIFUGE DI TER DEWATERNG CAKE r CAKE CENTRIFUGEU STORAGE LOADOUT SECONDARY CLARIFIER Orange County Sanitation • for you. Plant No . 1 Digesters Year Built Most Recent Digester cleaning Prior to P1-100 1959 N/A - Holdin 5 1962 NIA - Holdin 6 NIA — Em t 7 1970 NIA— Em 8 1978 2003 9 1978 2003 10 1993 2007 11 1993 2003 12 1993 2009 13 1993 2004 14 1993 2008 15 1993 2002 16 wevre here US •unty , , r r •range Digesters esters 7 & 8 Concrete Dome Repairs orangeWevre her4a for you), Digesters 7 & 8 Concrete Dome Repairs 7. ' Exposed rebar showing possible severe corrosion .1 A pocket of concrete where the rebar is exposed and corrosion is g evident (moderate to severe). Orange County Sanitation District We're here for you. Digesters 7 & 8 - Exposed Rebar • ' 1 1 1 1 Digester 13 — PVC T- lock Repairs 1 DIGESTER 13 »o, 9,500 CU. FLIFT. VOLUME 330, 430 CU. FT. 1 i 1 F ` Orange County Sanitation District We're here for you. Digesters Cleaning ," .'fie *`a. — �� x' ,yJJj/{ AL Anticipated Unknown Conditions • Volume Solids (Cleaning, Dewatering & Hauling) • PVC T- lock repairs • Crack repairs • Concrete repairs • Steel access manway repairs Orange County SanitationDistrict Recommended Action • Approve a budget increase of $4,355,000 for Sludge Digester Rehabilitation at Plant No. 1, Project No. P1-100, for a total budget amount of $64,902,000; and • Approve a contingency increase of $4,355,000 ( 13%) to the construction contract with JR Filanc Construction Company for Sludge Digester Rehabilitation at Plant No. 1, Project No. P1-100, for a total contingency of $8,375,000 (25%). Orange County Sanitation District We're here for you.