HomeMy Public PortalAbout1990_12_12_R305~ourg in ~Virginia
PRESENTED December 12, 1990
RESOLUTION NO. 90-305 ADOPTED December 12, 1990
A RESOLUTION: APPROVING CONTRACT AMENDMENT NO. 1 WITH CH2M HILL
SOUTHEAST, INC., FOR ADDITIONAL ENGINEERING SERVICES IN THE
UPGRADE/EXPANSION OF THE WATER POLLUTION CONTROL FACILITY
WHEREAS, the town is currently under contract with CH2M Hill Southeast, Inc., for design
and construction engineering services relating to the upgrade and expansion of the Water Pollution
Control Facility to a capacity of 6.0 MGD; and
WHEREAS, preliminaw design services for expansion to 6.0 MGD, completed in May 1990,
identified an estimated design and construction cost in excess of $30 million; and
WHEREAS, the estimated cost and capacity are beyond the town's present financial capability
and needs; and
WHEREAS, cost reduction alternatives totaling $10-12 million were approved for evaluation at
a September 1990 Council workshop, including a reduction in proposed plant capacity to 5.0 MGD; and
WHEREAS, amendment of the September 12, 1989 contract is necessary for evaluation and
incorporation of these cost reduction alternatives into a "Revised Preliminaw Design Report":
THEREFORE, RESOLVED by the Council of the Town of Leesburg in Virginia as follows:
The acting town manager is hereby authorized and directed to execute contract amendment no.
1, in the amount of $129,610.00, to the engineering services contract with CH2M Hill Southeast, Inc.,
dated September 12, 1989, for the Water Pollution Control Facility upgrade and expansion.
PASSED this 12th day of December , 1990.
ATTEST:
Clerk of Cou/1
Robm~ E. Sevila, Mayor
Town of Leesburg
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AMENDMENT 1
OWNER and ENGINEER agree that the following provisions, changes, and
modifications are made part of the AGREEMENT dated September 12, 1989 between
CH2M HILL Southeast, Inc., (the "ENGINEER"), and The Town of Leesburg in
Virginia, (the "OWNER"), for a PROJECT generally described as:
Upgrade and expansion of the Leesburg Water Pollution Control Facility
from 2.5 mgd to 6.0 mgd, to meet the Special Consent Order Standards.
1. Attachment A, Article 1--Scope of Services. Add:
"Phase 1A--GENERAL CONSULTING SERVICES
This task includes the following items:
1. A 'one-day special workshop with the Council to establish direction for
the project.
2. A one-half-day meeting with the Virginia Water Control Board to
discuss the toxicity monitoring program results and potential
requirements for a toxicity reduction evaluation."
"Phase 1B--REVISED PRELIMINARY DESIGN FOR INTERIM
UPGRADE
General
The purpose of this phase of the project is to develop a revised scope
for the expansion and upgrade (i.e. an interim upgrade) that will reduce
the cost of the project from the costs presented in the Preliminary
Design Report dated March 1990, by CH2M HILL. Cost reductions
alternatives will be selected that preserve the site layout presented in ihe
March 1990 report, which is based in on the building block concept.
Rather than alter the project substantially, alternatives will be selected
that are based on deferring the construction of non-essential facilities
defined in the March 1990 report until a later time, when funding or
other economic indicators are favorable. By preserving the building
block layout for this project, the deferred facilities may be added at later
time with minimal loss of investment.
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Task 1--Analysis of Peak Flows
The purpose of this task is to perform an analysis of peak flows to the
Leesburg WPCF to demonstrate that sufficient hydraulic capacity will be
provided in the plant expansion and upgrade to handle peak flows. It is
anticipated that the required capacity will be provided through a
combination of existing storage capacity (2.5 MG) and new throughput
capacity through the expanded and upgraded plant. The results of this
analysis will be used as supporting documentation for a waiver request,
to be submitted to the Virginia Water Control Board (VWCB), for the
24-hour storage requirement stipulated in the Special Consent Order.
Task 2--Meetings and Correspondence with VWCB/VDH
This task includes preparation of correspondence and attendance at
meetings with the VWCB and the Virginia Department of Health
(VDH) to request a waiver for the influent storage requirement. Other
issues that may be explored with the regulatory agencies as part of this
task include alternate discharge alternatives (e.g. Maryland, golf course
irrigation), and waiver of the influent storage aeration requirement (if
the storage requirement itself is not waived by the VWCB).
Task 3--Mass Balance/Unit Process Capacity Analysis
A complete mass balance will be performed based on the proposed
facilities for the 6-mgd expansion and upgrade project, as defined in the
March 1990 report. The mass balance will be used to refine sludge
quantities estimates prior to a final decision on alternate sludge handling
methods. The impact of the revised plant size will be considered in the
mass balance. The sludge quantity estimates will be used to refine cost
reduction measures proposed for sludge handling.
An analysis of the capacity of each unit process, as currently defined for
the 6-mgd project, will be performed. The purpose of this analysis is to
identify the limiting unit process so we can select the optimum flow
capacity to be provided for the down-scaled project.
This task will be completed in preparation for the workshop.
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Task 4--Workshop
The purpose of this workshop will be to evaluate and select the cost
reduction alternatives to be implemented based the information
developed during Tasks 1, 2, and 3. Non-economic concerns associated
with each alternative will be discussed. Previous experience with similar
projects will be used to judge the viability and cost-effectiveness of each
alternative. The following list of alternatives have been previously iden-
tified:
1. Eliminate brick veneer from all buildings; use architectural block
instead.
2. Eliminate new emergency storage facilities (subject to approval by the
VWCB).
2a. Eliminate aeration of stored influent flows (results in the elimination
of the proposed emergency storage blower building.) This alternative
Will be considered only if Alternative 2 is not approved by the VWCB.
This alternative is also subject to approval by the VWCB and the VDH.
3. Eliminate digester complex rehabilitation. Minor modifications will
still be required to meet code requirements stipulated by the Town's
insurance underwriter.
4. Build 5-mgd (4.16-mgd permit) plant instead of 6mgd plant. The
actual plant capacity to be provided will be determined in this workshop
based on the results of the unit process capacity analysis completed
during Task 3.
5. Eliminate chlorination/dechlorination facilities. Use ultra-violet light
disinfection instead.
6. Eliminate utility-water system.
7. Eliminate new digester complex. An additional fourth digester may
be required in the existing sludge digestion complex, as well as
supplemental aerobic digestion capacity. Actual requirements will be
determined in this workshop based on the mass balances completed
during Task 3. Aerobic digestion capacity may be provided by using one
of the proposed aeration basins as a digester. If required, lime
stabilization will be considered to supplement any
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digestion capacity that may not be available through the existing
digestion complex and/or the new aeration basins. Storage of sludge
cake may be required to satisfy the VHD storage requirements for land
application.
8. Use mechanical aeration instead of diffused aeration.
9. Use submersible pumps for waste activated sludge, return activated
sludge, and roughing filter effluent, instead of dry-pit pump stations.
A decision on these alternatives, as well as any other alternatives that
may be deemed appropriate, will be made during the workshop. There
will be no additional evaluation of alternatives (either conceptual layout
development or cost estimating) following this workshop. Decisions
made at the workshop will be documented through meeting notes. The
workshop will last a maximum of 2 days.
Task 5--Preliminary Design Report Revision
The Preliminary Design Report dated March 1990 will be revised based
on the decisions made during the workshop. The report will not be
reissued; instead, addenda will be issued for individual TM's within the
report to document any changes in the scope of the project. Only the
TM's that will be used during final design will be amended (i.e. TM's 10
to 19). The addenda will be bound in a single document that will serve
as a supplement to the March 1990 report. The preliminary design
drawings will be revised to reflect the revised scope of the project.
Task 6--Facilities Plan Revision
The 1990 facilities plan supplement will be revised in accordance with
the decisions made during the workshop. Thirty copies of the report will
be provided to the Town of Leesburg for distribution to the Council, the
VWCB, the VDH, and any other interested parties.
Task 7--Council Presentation
A presentation will be made at a Cotmcil meeting summarizing the
results of this phase of the project.
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This task includes preparation of suitable visual materials for the presen-
tation.
Task 8--Project Management
This task includes execution of project management duties, such as
workplanning, scheduling, monitoring of project progress, project
administration, filing, etc.
2. Attachment A, Article 1 (Continued)--Scope of Work Assumptions. Replace Item
28 with the following:
"28. Project Schedule
o Phase i (Preliminary Design) completed 6 months from
notice to proceed
o Phase lA (General Consulting Services) comPleted 8
months from notice to proceed
o Phase lB (Revised Preliminary Design) completed/
weeks from .notice to proceed
o Phase 2 (Final Design) completed 10 months from notice
to proceed."
3. Attachment C, Item 1. Replace the first paragraph with the following:
"The Cost Budget for the Phase 1 services represented by Direct
Salaries, plus salary and General Overheads and Direct Expense charges,
shall not exceed Four hundred and four thousand five hundred and
three dollars ($ 404,503), excluding taxes, without a formal Amendment
to this AGREEMENT. A change of work scope is not a pre-requisite
for said Amendment."
4. Attachment C, Item 1. Add:
"The Cost Budget for the Phase lA services represented by Direct
Salaries, plus salary and General Overheads and Direct Expense charges,
shall not exceed Two thousand two hundred dollars ($2,200), excluding
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taxes, without a formal Amendment to this AGREEMENT. A change of work
scope is not a prerequisite for said Amendment."
"The Cost Budget for the Phase lB services represented by Direct
Salaries, plus salary and General Overheads and Direct Expense charges,
shall not exceed Ninety two thousand one hundred and sixty four dollars
($ 92,164), excluding taxes,, without a formal Amendment to this
AGREEMENT. A change of work scope is not a pre-requisite for said
Amendment."
"The Fixed Dollar P3ofit for Phase lB of Nine thousand three hundred
and thirty six dollars ($ 9,336) may not be increased, except in
the case of an Amendment to this AGREEMENT that recognizes an
increase in the scope of work and related fixed fee."
This Amendment 1 supercedes all prior written or oral understandings and may only
be changed by a written amendment executed by both parties.
IN WITNESS WHEREOF, the parties execute below:
For the OWlXI~R, The Town of Leesburg in Virginia,
dated this ~-- day of '~o~.9 ,199 ! .
:/~' ~'"Sa~me Ti-tie ~'
For the ENGINEER, CH2M ,HILL Southeast, INC.,
t t s rz
da ed hi o~].~_ day_of. /c~e,,~J~,~ , 19 rio .
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