91-0508 Black and Veatch RESOLUTION
AUTHORIZING EXECUTION OF AMENDMENT NO. 2 TO AN AGREEMENT
WITH BLACK & VEATCH
BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF ELGIN,
ILLINOIS, that Larry L. Rice, City Manager, be and is hereby
authorized and directed to execute Amendment No. 2 to an
agreement on behalf of the City of Elgin with Black & Veatch
for the Comprehensive Water Master Plan, a copy of which is
attached hereto and made a part hereof by reference.
s/ George VanDeVoorde
George VanDeVoorde, Mayor
Presented: May 8, 1991
Adopted: May 8, 1991
Vote: Yeas 7 Nays 0
Recorded:
Attest:
s/ Dolonna Mecum
Dolonna Mecum, City Clerk
AMENDMENT NO. 2
TO
AGREEMENT FOR ENGINEERING SERVICES
THIS AMENDMENT NO. 2, executed in triplicate, between the City of Elgin,
Illinois (Owner) and Black & Veatch, Engineers-Architects (Engineer)
shall modify the AGREEMENT FOR ENGINEERING SERVICES dated July 26, 1990.
WITNESSETH: That the Owner employed the Engineer to perform engineering
services related to preparing a Comprehensive Water Master Plan
involving evaluation and study of water supply, treatment, transmission,
and distribution; and including an SDWA impact assessment. The water
treatment plant expansion evaluations will address alternative treatment
processes for the Riverside water treatment plant. Alternatives for
taste and odor reduction will be evaluated. The Engineer has
recommended, and the Owner has concurred, that the scope of work
relative to Task 403 of Phase 400 - Water Treatment Plant Expansion
Evaluations be expanded to include a pilot plant scale testing program
to assess the effectiveness of ozone for taste and odor reduction at the
Riverside plant. In response to these supplemental services, certain
revisions must be made to the Contract. In compliance, therefore, the
terms and conditions of the Original Contract are modified as
specifically set out below. All other parts of the Original Contract
remain unchanged.
ATTACHMENT A - SCOPE OF SERVICES
Under Phase 600 - Supplemental Services, expand the referenced original
tasks by adding the following phase and task descriptions relating to
evaluations and studies under Phase 350 - Pilot Plant Studies:
PHASE 350 - PILOT PLANT STUDIES
Engineering services will consist of a pilot plant scale testing program
to assess the effectiveness of ozone for taste and odor reduction at the
Riverside water treatment plant. The major objective of these tests
will be to determine the effect of ozone on naturally occurring geosmin
and 2-methylisoborneol (MIB) concentrations in the Fox River. Tests
will be performed to evaluate ozonation in two locations (1) after the
presedimentation step and before lime softening, and (2) after the
second stage of lime softening. Other objectives include the
determination of ozone dosages needed to maintain a residual that would
satisfy the CT (Concentration x Time) requirements of the Surface Water
Treatment Rule (SWTR). Several tests would also be conducted to
determine secondary disinfection options to reduce THM concentrations
below 50 µg/L. The basic testing protocol consists of two treatment
scenarios, interstage ozonation (following presedimentation) and post
ozonation (following lime softening).
The test scenarios will be evaluated using the Black & Veatch Mobile
Water Treatment Research Unit (pilot plant).
W3JAG041191 1
The pilot studies proposed will require substantial involvement of the
Owner's water treatment laboratory personnel to perform analyses and
assist in pilot plant operations. Black & Veatch will provide an
engineer to oversee the testing program and pilot plant operations. The
Owner will be responsible for all analytical testing (except ozone
residual) , will provide all chemicals for pilot plant operation (e.g.
geosmin, MIB, carbonic acid for pH adjustment, hydrogen peroxide) , and
will prepare chemical feed stock needed for the operation of the pilot
plant.
In general , the pilot plant studies will involve the following tasks:
TASKS
351 - Conduct Pilot Plant Studies. Conduct pilot plant studies to
assess the effectiveness of ozone for taste and odor
reduction at Riverside water treatment plant and other
secondary objectives as outlined in Black & Veatch's
memorandums dated March 19, 1991, and April 4, 1991.
352 - Evaluate Pilot Plant Data. Evaluate the test data from the
pilot plant studies to determine the ozone dose required to
achieve reduction of taste and odor compounds and the optimum
application point. The benefits available for other uses of
ozone, such as disinfection, will be evaluated. The ozone
dose and resulting CT calculations will be determined.
Alternate distribution system disinfection scenarios and
their impact will be evaluated.
353 - Prepare Preliminary Opinion of Probable Cost. Prepare
preliminary opinions of construction costs and annual
operating and maintenance costs for the use of ozone in full
scale ozone generation and dissolution facilities. Costing
will include evaluation of any savings associated with the
elimination of powdered activated carbon and potassium
permanganate feeds.
354 - Prepare Draft Report,. Prepare a draft report of the findings
and recommendations of the studies based on results of the
previous tasks. Submit five copies to Owner for review and
comments.
355 - Finalize Report. Upon receipt and incorporation of Owner's
review comments, complete the report, and submit five copies
of report to Owner. Incorporated this report into the draft
report prepared under Task 408.
W3JAG041191 2
ATTACHMENT B - COMPENSATION
Under Subparagraph C, the following establishes the compensation of the
additional work. For Supplemental Services, as identified hereinbefore,
the Owner agrees to pay an amount equal to the Engineer's salary costs
times 2.83 plus reimbursable expenses at cost and plus subcontract
billings times 1.05. A maximum amount to be invoiced for these
Supplemental Services shall not exceed $35,000.
Under Subparagraph I , submittal of draft copies of report for Phase
350 - Pilot Plant Studies shall b e 30 calendar days following
completion of pilot plant operations and receipt of all test results.
To allow the pilot plant recommendations to be included in the water
treatment plant expansion evaluations report, the time frame for
submittal of draft copies of report for Phase 400 - Water Treatment
Plant Expansion Evaluations shall be changed to 45 calendar days
following completion of pilot plant operations and receipt of all test
results.
ATTACHMENT C - OWNER'S RESPONSIBILITIES
In association with the pilot plant studies, the Owner will furnish, as
required by the work and not at the expense of the Engineer, the
following additional items:
11. Water plant and/or laboratory staff to perform analysis and assist
in the pilot plant operations.
12. All analytical testing (except ozone residual) , provide chemicals
for pilot plant operation (e.g. geosmin, MIB, carbonic acid for pH
adjustment, hydrogen peroxide), and preparation of chemical feed
stock needed for operation of the pilot plant. Analytical testing
will include in-house testing and outside testing by private
laboratory as required.
13. A Taste and Odor Panel consisting of plant, laboratory, or other
City personnel and/or preselected consumers to perform necessary
taste and odor tests.
14. Fairly flat site locations for the pilot plant unit providing
adequate security, access to 220 volt single phase power, access
to raw water and potable water, access to drainage, and a suitable
vehicle to relocate the pilot plant unit from an initial site
location to a second site location if required for the testing.
W3JAG041191 3
. . •
- IN WITNESS WHEREOF, the parties have executed this Amendment on this
%.,i, -- day of A cCy 1991.
CITY OF ELGINA► i S
By: . P __
BLACK & VEATCH, E'NGINEERS-ARCHITECTS
B -- — i �
By
Partner
W3JAG041191 4
•
111
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- c, Agenda Item No .
�g7fD FCB1.
TO: Mayor and Members of the City Council
FROM: City Manager
DATE: April 16, 1991
SUBJECT: OZONE PILOT PLANT TEST -- TASTE AND ODOR CONTROL
PURPOSE:
This memorandum will provide the Mayor and Council with
information to consider authorizing execution of Amendment #2 to
the agreement for engineering services with Black & Veatch
consulting firm to conduct pilot plant testing of ozone for the
removal of taste and odor compounds.
BACKGROUND:
On July 26, 1990, the City executed an agreement for
engineering services with Black & Veatch to provide a
comprehensive water master plan involving the evaluation and
study of the water supply, treatment, transmission, and
distribution systems, and including an assessment of the Safe
Drinking Water Act. Part of the supplemental services provided
in that agreement was a provision for pilot plant testing of
ozone as a potential remedy for the periodic taste and odor
problems that occur in our raw water source. Attached is a copy
of Amendment #2 outlining the work and study to be conducted
under this additional agreement.
Historically, taste and odor problems occur the first week or
two in May as river water temperatures begin to increase. The
Water Department and the consulting firm are prepared to conduct
these investigations at that time.
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Page 2
FINANCIAL IMPACT:
Under appropriation #400-978-9968, the Water Department's 1991
budget allocates $50,000 for the ozone pilot plant study. This
amount includes the supplemental services to be provided by the
engineering firm and the additional chemicals and supplies from
the Water Department.
RECOMMENDATION:
It is recommended that the Council authorize the execution of
Amendment #2 to the agreement for engineering services with
Black & eatch fo : • ice not to exceed $35,000.
i.1...�
City Manager
LLR:LED:jk 01140416 .291
cc: Melford A. Dahl, Acting Public Works Director
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Attachment
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