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Item 15.a.
,ek CENTRAL SAN
SANITARYCENTRAL CONTRA COSTA , .
May 2, 2019
TO: HONORABLE BOARD OF DIRECTORS
FROM: ROGER S. BAILEY, GENERAL MANAGER
SUBJECT: ANNOUNCEMENTS - MAY 2, 2019
Attached are the announcements for the above meeting.
ATTACHMENTS:
1. General Manager Announcements
May 2, 2019 Regular Board Meeting Agenda Packet- Page 156 of 194
Page 2 of 2
ATTACHMENT 1
Board Meeting of May 2, 2019
General Manager Written Announcements
PROJECT UPDATE
1) Project Bidding for Sludge Blending Tank Repairs, District Project 6172
The Sludge Blending Tank (SBT) will be taken out of service for condition assessment
and repairs. The SBT Repairs project will improve the performance of the existing sludge
blending and lime systems. Raw wastewater solids collected from the primary and
secondary processes combine in the SBT prior to dewatering at the Solids Conditioning
Building. Lime is added to control pH and improve dewatering. The process results in a
buildup of wastewater solids and lime on the SBT walls, system piping and valves. The
lime tanks also accumulate a considerable amount of lime within the tank.
As part of the condition assessment, the SBT will be cleaned, inspected and valves and
some piping will be replaced as needed. The project will advertise on May 7 and May 14,
2019. Bids will be opened on May 28, 2019. The Engineer's estimate is $525,000. More
information will be presented when the Board is asked to award the construction contract
on June 20, 2019.
May 2, 2019 Regular Board Meeting Agenda Packet- Page 157 of 194