HomeMy WebLinkAbout07.a. Authorize amendment to contract with Carollo Engineers, Inc. re DP 7301S
Board Meeting Date:
Central Contra Costa Sanitary District
BOARD OF DIRECTORS
POSITION PAPER
September 6, 2012
Subject: AUTHORIZE THE GENERAL MANAGER TO AMEND AN EXISTING
AGREEMENT WITH CAROLLO ENGINEERS, INC., FOR PROFESSIONAL
ENGINEERING SERVICES FOR TREATMENT PLANT PLANNING, DISTRICT
PROJECT 7301
Submitted By: Initiating Dept. /Div.:
Michael J. Penny, Senior Engineer Engineering /Environmental Services
REVIEWED AND RECOMMENDED FOR BOARD ACTION:
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S gelage M. Penny J. Miyamo o -Mills Ann E. Farrell
General Manager
ISSUE: Board of Directors' authorization is required for the General Manager to amend
an existing professional services agreement beyond staff authority limits.
RECOMMENDATION: Authorize the General Manager to amend an existing
Professional Engineering Services Agreement with Carollo Engineers, Inc., (Carollo)
from $70,000 to $360,000 for Treatment Plant Planning, District Project 7301.
FINANCIAL IMPACTS: The final planning level cost for this portion of the project,
including District staff time, will be approximately $500,000.
ALTERNATIVES /CONSIDERATIONS: An alternative would be to hire additional
engineering staff. The broad range of professional expertise needed would require
hiring numerous people. It has been the District's practice to augment staff with
consultants on specialty planning and larger projects.
BACKGROUND: As wastewater regulations continue to develop at the regional level,
process modifications may be required in the Treatment Plant to remove ammonia and
nutrients. The District's 2012 NPDES Permit requires the District to evaluate by
February 28, 2014, alternative treatment technologies to remove ammonia and
nutrients from our discharge.
In mid August, 2012, a $70,000 agreement was let to Carollo to start review of existing
Treatment Plant data and reports, and to perform tracer studies of the primary
sedimentation basins (PSBs) and secondary aeration basins. The PSB tracer study will
analyze the effectiveness of baffle installation in the District's PSBs to improve removal
of carbonaceous biochemical oxygen demand (CBOD). Improved CBOD removal in
the PSBs would decrease the air required to satisfy CBOD in the secondary process
and therefore increase the air available in the existing aeration system for ammonia
removal. The secondary aeration basin tracer study will be used to provide data for the
configuration of the proprietary BioWin treatment plant model.
N: \ENVRSEC \Position Papers \Penny\2012 \9- 6 -12 \PP for Facility Modification by Carollo 9 -6 -12 FINAL.doc
POSITION PAPER
Board Meeting Date: September 6, 2012
subject. AUTHORIZE THE GENERAL MANAGER TO AMEND AN EXISTING
AGREEMENT WITH CAROLLO ENGINEERS, INC. FOR PROFESSIONAL
ENGINEERING SERVICES FOR TREATMENT PLANT PLANNING, DISTRICT
PROJECT 7301
This phase of the project will evaluate the extent to which ammonia removal can be
achieved with relatively modest changes to the existing process and improvement of
facilities in the near term. Work will include final configuration of the BioWin treatment
plant model for simulation of the District's facilities and processes. The model will then
be used to investigate candidate operational and facilities modifications for optimization
of ammonia removal. These candidate modifications will then be prioritized. A pilot/full
scale testing program of promising scenarios will be developed to confirm the BioWin
modeling results and determine to what levels ammonia removal can be accomplished
without major plant upgrades. Pilot testing is not currently part of the Carollo
agreement.
Staff has evaluated this action and concluded it is exempt from the California
Environmental Quality Act (CEQA) under the District's CEQA Guidelines Section 15262
since the agreement would be used for design studies for possible future actions which
the District has not approved, adopted, or funded, and the outcome of these tasks will
not have a legally binding effect on later activities. Approval of this action will establish
the Board of Directors' independent finding that the action is exempt from CEQA. The
Board further finds that the District will produce appropriate CEQA compliance
documentation prior to undertaking any "project" arising from these design studies.
RECOMMENDED BOARD ACTION: Find that this action is exempt from the California
Environmental Quality Act and authorize the General Manager to execute an
amendment to the existing Professional Engineering Services Agreement with Carollo
Engineers, Inc., for Treatment Plant Planning, District Project 7301, to increase the cost
ceiling to $360,000.
N: \ENVRSEC \Position Papers \Penny\2012 \9- 6 -12 \PP for Facility Modification by Carollo 9 -6 -12 FINAL2.doc
POSITION PAPER
Board Meeting Date: September 6, 2012
subject. AUTHORIZE THE GENERAL MANAGER TO AMEND AN EXISTING
AGREEMENT WITH CAROLLO ENGINEERS, INC. FOR PROFESSIONAL
ENGINEERING SERVICES FOR TREATMENT PLANT PLANNING, DISTRICT
PROJECT 7301
This phase of the project will evaluate the extent to which ammonia removal can be
achieved with relatively modest changes to the existing process and improvement of
facilities in the near term. Work will include final configuration of the BioWin treatment
plant model for simulation of the District's facilities and processes. The model will then
be used to investigate candidate operational and facilities modifications for optimization
of ammonia removal. These candidate modifications will then be prioritized. A pilot/full
scale testing program of promising scenarios will be developed to confirm the BioWin
modeling results and determine to what levels ammonia removal can be accomplished
without major plant upgrades. Pilot testing is not currently part of the Carollo
agreement.
Staff has evaluated this action and concluded it is exempt from the California
Environmental Quality Act (CEQA) under the District's CEQA Guidelines Section 15262
since the agreement would be used for design studies for possible future actions which
the District has not approved, adopted, or funded, and the outcome of these tasks will
not have a legally binding effect on later activities. Approval of this action will establish
the Board of Directors' independent finding that the action is exempt from CEQA. The
Board further finds that the District will produce appropriate CEQA compliance
documentation prior to undertaking any "project" arising from these design studies.
RECOMMENDED BOARD ACTION: Authorize the General Manager to execute an
amendment to the existing Professional Engineering Services Agreement with Carollo
Engineers, Inc., for Treatment Plant Planning, District Project 7301, to increase the cost
ceiling to $360,000.
N: \ENVRSEC \Position Papers \Penny\2012 \9- 6 -12 \PP for Facility Modification by Carollo 9 -6 -12 FINAL.doc