HomeMy WebLinkAbout07.a. (Handout) Carollo Engineers Agreement Amendment7a.
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Item No. 7.a.
Carollo Engineers Agreement Amendment
Treatment Plant Planning Project
(District Project 7301)
Michael Penny
Senior Engineer
September 6, 2012
Central Contra Costa Sanitary District
Project History
• 2012 National Pollutant Discharge Elimination
System Permit Supplement
— Ammonia Removal Facility Plan (Due 2/28/14)
• Work plan (submitted 6/29/12)
— Work Plan Elements
• Major plant upgrades
• Existing plant operations modifications and side
stream treatment
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Recent Activities
• Carollo Provided Proposal 7/31/12
• Staff Executed $70,000 Agreement on 8/20/12
— Review of sampling plan for treatment plant BioWin
Simulator Model
— Dye tracer testing of primary sedimentation basins
and aeration & nitrification tanks
Additional Scope Items
• Work with Dr. Paul Pitt to Configure the District
Specific BioWin Model
— Verify configuration
— Provide input for additional sampling
— Provide protocols for conducting bench -scale
nitrification testing
• Develop Conceptual Operations Modifications
and Side Stream Treatment Options
— Run simulations
— Develop short list with District staff
Additional Scope Items (Continued)
• Further Evaluate Top Modification Options
— Layout schematics
— Capital and operations & maintenance costs
— Green House Gas evaluation
— Constituents of emerging concern and phosphorus
impacts
• Develop Pilot Plant Testing Program
— Pilot plant testing is not part of this scope
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Schedule and Cost
• Completion Date — May 2013
• Amendment Cost Increase — $290,000
A L
Staff Recommendation
Authorize the General Manager to amend the
existing agreement with Carollo Engineers for
professional engineering services in connection
with the Treatment Plant Planning Project,
District Project 7301.
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Questions ... .