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HomeMy WebLinkAboutItem 7 PPP Operations 11-01-2017 - J-124 PDSA Award *�1 e A a. JW Digester Gas Facilities Rehabilitation Project No . J - 124 - . • A Gas Facilities Vital Part of Biosolids Program 7,; .,-� Gas Compressors, Flares, and Treatment 11,000 cfm capacity � ' � 1500 hp tota I Anaerobic Digesters Central Generation Plant 1: 21 mil gal 21 MW Capacity Plant 2: 23 mil gal Interplant Gas Pipeline 3.6 miles of 16" pipe • ce aging Project Objectives equipment and ensure parts availability • Allow flaring of low pressure gas • Ensure buildings are sound and code compliant • Accommodate additional gas from food waste • • safetyand reliability Plant 1 Gas Handling Facilities ion • Constructed in 1992 • Building is in good condition, well located • Hazards installing new compressors next to operating units • Study found safe, effective solution Plant 2 Gas Handling Facilities Constructed in 1983 Compressor Building is Inadequate No space available for construction Poorly configured for hazardous be' area classification requirements Alternative Site Locations <. Existing location good, but temporary facility required (time and $$$) } • Consultant will evaluate alternatives r • One alternative on an active fault • Significant design differences among alternatives Consultant Selection • Four proposals received, two invited to interview • Brown and Caldwell unanimously selected as most qualified • Strong technical team with similar facility experience • Deep understanding of Plant 1 sequencing challenges • Comprehensive risk strategy and approach pp Negotiation A roach • 14 meetings over 6 weeks • Reviewed assumptions • Site options & impacts • Potential fault design requirements • Reviewed approach • Optimized meetings • Shifted hours to less expensive roles • Tailored 3D strategy • 100% in buildings • Tunnels where needed only • Reviewed level of effort • Sheet count • Hours per task • Verified overhead and fringe rates Summaryof major ne otiated changes J g Decreased: Increased: • Design of temporary facilities • 3D Building Design • Simplified commissioning approach • 3D Scan for Tunnels • Fewer Elec and I&C drawings • Implementation plan details • Meetings and workshops • Modeling for seismic fault Location • Subsurface investigations dependent • Additional tunnels • Additional CEQA and permitting Affillmb Original Fee Proposal 511417 $10,517,796 Negotiated Agreement 581011 $11,770,000 Change +61597 +$11252,204 Recommendations : • Approve a Professional Design Services Agreement with Brown and Caldwell to provide engineering design services for the Digester Gas Facilities Rehabilitation, Project No. J-124, for an amount not to exceed $ 11,770,000; and • Approve a contingency of $ 1, 177,000 ( 10%)