HomeMy WebLinkAboutItem 7 PPP Operations 11-01-2017 - J-124 PDSA Award *�1
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Digester Gas Facilities Rehabilitation
Project No . J - 124
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Gas Facilities Vital Part of
Biosolids Program
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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 $$$)
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• Consultant will evaluate alternatives
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• 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
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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
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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%)