205-CPH-Amendment 57 AMENDMENT NO. 57
TO
AGREEMENT FOR CONTINUING SERVICES
FOR THE DESIGN AND PERMITTING OF THE
SANFORD NORTH WATER RECLAMATION FACILITY
PRIMARY TREATMENT SYSTEM IMPROVEMENTS
BETWEEN
THE CITY OF SANFORD, FLORIDA
AND
CPH ENGINEERS, INC.
This Agreement made on theE:>1 ~"(~day of ; 2C00 between the CITY OF
SANFORD, FLORIDA (hereinafter called the C~H ENGINEERS, INC. (hereinafter called
the ENGINEER), is mutually agreed upon and declared an authorized Amendment to an
Agreement dated December 7, 1983, between the parties, herein setting forth the scope, terms and
conditions of the work herein authorized.
In case of any conflict between this Amendment and the aforementioned Agreement of December
7, 1983, this Amendment shall govern for the work described herein.
SECTION 1
PURPOSE OF AMENDMENT
1.1. Introduction
The existing pdmary treatment facility (headworks) at the Sanford North Water
Reclamation Facility consists of flow collection facilities for the City's wastewater
collection system, manual barscreens (1 -inch spacing), dual aerated grit chambers,
a stormwater bypass pumping station, and a mechanical barscreen (¼-inch
spacing). The system components, with the exception of the mechanical barscreen,
are approximately thirty (30) years old and need to be replaced due to
obsolescence, oxidation, reduced process efficiency and odorcontrol concerns. The
following is a brief discussion of the condition and problems associated with these
items:
1.1.1 Manual Barscreens
The manual barscreens are constructed of "cold-rolled" steel and are
severely oxidized. The bar spacing is quite large and is currently
inefficient in removing floatable materials and needs immediate
replacement.
1.1.2 Dual Aerated Grit Chambers
The dual aerated grit chambers (cima 1971) utilize a older technology
that is very inefficient, based upon the treatment technologies available
today, in removing the grit (heavy inorganic suspended solids) from the
raw wastewater stream. One of the major problems is that the grit is
passing through the existing aerated grit chambers and is accumulating
in the downstream pipes and structures thereby reducing their hydraulic
capacity and treatment efficiency.
Secondly, another major problem with the current aerated grit chamber
facility deals with the generation and release of odors from the aerated
grit chamber. The aerated grit chamber is also an "open air" structure
and utilizes an overhead clamshell mechanism to remove the grit from
the bottom of the structure. When the raw wastewater enters the grit
chamber facility, the turbulent action in the current treatment system
releases dissolved gases (hydrogen sulfide, memaptans, skatoles, etc.)
into the atmosphere. This "open air" condition leads to the generation
of odors not only from the grit facility but also from the grit storage area.
These noxious odors then emanate from the facility and drift into the
downtown area and throughout the City (based on wind direction).
Construction of new grit removal and odor control facilities is critical to the
efficient operation of the water reclamation facility and the reduction of
secondary impact to the community associated with the release of
malodorous gases and aerosols into the community and environment.
1.1.3 Stormwater bypass pumping station
With the City's investment in the Vacuum Sewer Collection system in
1990, infiltration and inflow has been reduced significantly. The
stormwater bypass pumping station is an antiquated unit that was only
used during high flow periods prior to removal of the City's Combined
Sewer System and can be retired and removed. A newer gravity flow
system shall be employed to convey excessive flows from the collection
system to the detention ponds.
1.1.4 Mechanical Barscreen
The existing automatic, self-cleaning mechanical barscreen is
approximately~three years old and was installed with a fine screen (~-
inch) to remove very small floatable objects within the raw wastewater
stream. This unit is operating very efficiently and will be roused in the
new primary treatment system reconfiguration,
1.1.5 Flow Measurement
FDEP regulations require the City to measure the flow of raw wastewater
entering the water reclamation facility (62-600, F.A.C.). The current
configuration of the treatment facility unit operations and processes
allows the City to measure the combined flow of the raw wastewater and
all process waters being returned to the primary treatment facility for
further treatment. The City has been cited by FDEP in the last two
annual inspections with regard to this matter. The City has ensured the
FDEP that steps would be taken in Fiscal Year 2001 to correct these
deficiencies through the design and construction of modifications to the
primary treatment system,
After careful evaluation of potential solutions, based on constructibility techniques,
operator requirements, operation and maintenance requirements, capital and
annual costs associated with the construction and operation of the primary
treatment facilities, and efficiency of operations, the Recommended Plan, which is
in accordance with the City's Comprehensive Plan and Master Wastewater Plan,
calls for the following improvements at the Sanford North WRF:
· Construction of a New Infiuent Channel. Construction of a new concrete
infiuent channel at the southeast corner of the facility site. The influent
channel will collect all raw wastewater flows from the collection system and
will incorporate a "Parshall Flume" for the measurement of raw wastewater
flow to the Sanford North Water Reclamation Facility, thereby meeting the
FDEP mandated requirements. The existing mechanical barscreen will be
relocated from it current location into the new channel to provide removal of
all floatable objects in the raw wastewater. The new infiuent channel will
have a positive connection to the existing master lift station for conveyance
of the raw wastewater to the next unit operation in the treatment scheme.
· Construction of Odor Control Facilities. Odor control facilities will be
constructed and attached to the new influent structure to collect and treat all
odor emanating from the degassification of the raw wastewater, thereby
reducing the risk of odor complaints by surrounding residences and
businesses in the area. A two-stage, chemically oxidizing scrubber and/or
inorganic biofilter will be used depending upon the area required for the
scrubber, the available area in the SE comer of the facilitiy and the total
capital and annualized operating costs of the systems.
· Construction of a New Grit Removal Facility. A new "vortex" type grit
removal facility will be built immediately south of the current biological
treatment system. The new grit removal system will be constructed above
grade on a concrete slab and will incorporate corrosion resistant materials
(FRP or stainless steel) and will have no moving internal parts. Two grit
chambers will be constructed using air to provide mixing and removal of the
gdt from the wastewater stream as well as removal of the grit from the
bottom collection hopper of the each grit chamber. Collected grit will be air-
lifted and pumped, as a slurry, to a grit washer and declassifier that will wash
and dewater the grit and then dispense this cleaned material into a covered
dumpster for final disposal. A common influent channel will allow
conveyance of the wastewater to either grit chamber as well as to the south
detention pond should high flow conditions prevail (gravity flow).
· Demolition of the existing grit chamber system. All above-grade structural
steel used to support the clamshell mechanism will be removed and placed
inside the existing grit chamber. The existing grit chamber concrete walls will
be saw cut to a depth of two-feet below grade and will be pushed into the
existing grit chamber facility. Backfill will then be placed into the existing grit
chamber facility and the area will then be landscaped. An possible
alternative to demolition will be evaluated with the City. This alternative calls
for filling in the existing aerated grit chamber and pouring a 12-inch thick
concrete slab over it. The existing structural steel could be reconditioned
and used as a supporting mechanism for seamless aluminum siding and
roofing, with some modifications, thereby turning the structure into either a
storage or maintenance building at a relatively low square footage cost.
· Electrical, Controls, Instrumentation and SCADA Improvements.
· Stormwater Management system improvements around the newly
constructed areas will be incorporated into the design based on the MSSW
requirements of FDEP.
· Miscellaneous yard piping, paving and miscellaneous appurtenances and
ancillades as required to provide the City with a fully operational, complete
and functional system that meets all of the Federal, State and BMP
requirements.
To maintain the project on schedule and meet the timetable set with FDEP to
incorporate the changes, the project must proceed immediately at the Sanford North
. WRF.
In addition to the new primary treatment system improvements identified above, the
Engineer will also provide professional engineering services associated with the
following miscellaneous treatment facility projects:
· Removal and Replacement of the Existing Hydropneumatic Tank
The Engineer will provide professional engineering services in association
with the removal of the existing hydropneumatic tank and replacement of the
system (tank ruptured); review of shop drawings for the "new"
hydropneumatic/surge tank system; and construction administration and
inspection services during installation of the new system.
· Rehabilitation of Secondary Clarifier No. 1
The Engineer will provide professional engineering services in association
with the demolition of the existing secondary clarifier intemal mechanisms,
equipment and appurtenances; inspection of the condition of the concrete
walls and slab; review of shop drawings for the "new" secondary clarifier
internal mechanisms, equipment and appurtenances; and construction
administration and inspection services during installation of the new system.
® Cleanina of the existing outfall pipe
The Engineer will provide professional engineering services in association
with the permitting, cleaning, and regulatory clearance of the existing outfall
line from the Sanfgrd North Water Reclamation Facility to Lake Monroe.
1.2 Purpose
This purpose of this Amendment is to generally provide professional engineering
services for the design and permitting of the Primary Treatment System
improvements and other minor miscellaneous engineering projects at the Sanford
North Water Reclamation Facility.
SECTION 2
DESIGN AND PERMITTING
2.1. Specific services of the ENGINEER shall include the following:
A. Coordinate with the surveyor employed by the ENGINEER to obtain a
topographic survey to be used as a base for design of the "new" primary
treatment facilities.
B. Coordinate with the geotechnical firm employed by the ENGINEER for obtaining
soil borings and recommendations at the Sanford North WRF for foundation
stability and compaction requirements for the proposed facility structures. Also
included will be general classifications of soils and recommendations regarding
drainage and stormwater detention pond pemolation rates and recovery periods.
C. Prepare a preliminary site layout for the proposed pdmary treatment system
improvements at the Sanford North Water Reclamation Facility.
D. Prepare hydraulic calculations for the proposed primary treatment system
improvements at the Sanford North Water Reclamation Facility..
E. Meet with City Utilities Department and Operating personnel and coordinate the
basis of design for the proposed improvements based on operational
experience.
F. Prepare the following plan sheets:
1. Cover Sheet
2. Index of Sheets, Standard Abbreviations and Symbols
3. Survey Plan - Influent Structure
4. Survey Plan - Grit Chamber
5. Site Dimension Plan - Influent Structure
6. Site Dimension Plan - Grit Chamber
7. Site Piping Plan - Influent Structure
8. Site Piping Plan - Grit Chamber
9. Site Piping Plan Details
10. Site Piping ~ Plan and Profile
11. Site Piping - Plan and Profile
12, Site Grading Plan - Influent Structure
13. Site Grading Plan - Grit Chamber
14. Site Grading Plan Details
15. Landscaping Plan
16. Landscape Details
17, Hydraulic Profile
18. Influent Structure - Mechanical Plan
19. Influent Structure - Mechanical Plan
20. Influent Structure - Mechanical Details
21. Infiuent Structure - Mechanical Sections
22. Influent Structure - Structural Plan
23. Influent Structure - Structural Plan and Sections
24, Influent Structure - Structural Sections
25. "Vortex Type" Grit Chamber - Mechanical Plan
26. "Vortex Type" Grit Chamber - Mechanical Plan
27. "Vortex Type" Grit Chamber - Mechanical Details
28. "Vortex Type" Grit Chamber - Mechanical Details
29. '~/ortex Type" Grit Chamber - Structural Plan
30. "Vortex Type" Grit Chamber - Structural Sections and Details
31. Odor Control System - Plan
32. Odor Control System - Details
33. Demolition Plan
34. Demolition Plan
35. Miscellaneous Details
36. Miscellaneous Details
37. Electrical Site Plan - Influent Structure
38. Electrical Site Plan - Grit Chamber
39. Electrical - Single Line Diagram
40. Electrical - Influent Structure
41. Electrical - Grit Chamber
42. Electrical Details and Schedules
43. Electrical Plan and Details
44. Network Riser Diagram
G. Prepare stormwater calculations and assist the CITY in obtaining an MSSW
Stormwater Permit from FDEP forsite improvements atthe Sanford North Water
Reclamation Facility.'
H. Prepare structural calculations.
I. Prepare contract documents (specifications) for the proposed improvements at
the Sanford North Water Reclamation Facility.
J. Preparequantitiesandanopinionofprebableconstructioncostfortheproposed
primary treatment system improvements at the Sanford North WRF.
K. Prepare a preliminary design report as required by Chapter 62-600.715, F.A.C.
and an abbreviated engineering report as required by Chapter62-61 0.310(2)(a) ,
F.A.C.
L. PreparetheFDEPPermitAppiicationfortheimprovementsattheSanfordNorth
Water Reclamation Facility and assist the City in permitting the project with
FDEP. To keep the project on schedule an engineering report wil'l be prepared
and the facility will be permitted based on said report. This will allow the City to
obtain an FDEP Permit prior to August 2001. The plans and contract
documents (specifications) will continue to be worked on during the permit
review period.
M. Through an Electrical Subconsultant provide the Electrical Design for the
proposed improvements at the Sanford North Water Reclamation Facility to
meet Class I Reliability Standards. Prepare the facility lighting plan for the
primary treatment structure (headworks) and grit chamber areas and SCADA
system improvements to be integrated with the City's existing SCADA System
at the Sanford North WRF.
N. Provide professional engineering services associated with the removal and
replacement of the existing hydropneumatic tank at the Sanford North WRF.
The Engineer will supervise the removal of the existing hydropneumatic tan k and
replacement of the system; review shop drawings for the "new"
hydropneumatic/surge tank system; and provide construction administration and
inspection services during installation of the new system.
O. Provide professional engineering services in association with the rehabilitation
of Secondary Clarifier No. 1 to include: (1) supervision of the demolition of the
existing secondary clarifier internal mechanisms, equipment and appurtenances;
(2) inspection of the condition of the concrete walls and slab and determination
of the need for further rehabilitation of the concrete surfaces; (3) review of shop
drawings forthe "new" secondary clarifier intemal mechanisms, equipment and
appurtenances; and (4) construction administration and inspection services
during installation of the new secondary clarification system.
P. Provide professional engineering services in association with the contract
negotiation, permitting, cleaning, and regulatory clearance of the existing ouffall
line from the Sanford North Water Reclamation Facility to Lake Monroe.
SECTION 3
SUPPLEMENTARY SERVICES OF THE ENGINEER
3.1. If authorized by the CITY, the ENGINEER shall furnish or obtain from others,
supplementary services of the following types which will be paid for by the CITY as
an additional cost as outlined in Section 5.
3.2. Additional services due to significant changes in the scope of the project or its
design including, but not limited to, changes in size, complexity, character of
construction, or due to time delays in initiating or completion of the work as
described heroin.
3.3. Except as otherwise provided heroin, services or additional costs associated with
revising previously accepted studies, roports, or other documents preparod by the
ENGINEER when such revisions aro due to causes beyond the ENGINEER's
control.
3.4. Additional services rosulting from public protests, administrative hearings, orsimilar
matters.
3.5. Preparing to serve and/or serving as an Expert Witness for the'CITY in any
litigation, public hearing, condemnation proceeding, right-of-way or easement
acquisition or negotiation, or other legal / administrative proceeding.
3.6. Additional engineering services requirod by revisions to regulations (after the date
of this Amendment) as applicable to the U.S. EPA, Florida Department of
Environmental Protection (FDEP), or other regulatory agency requiroments.
3.7. Additional services in connection with the project including services normally
furnished by the CITY as described in Section 4 herein and services not
otherwise provided for in this Agreement.
SECTION 4
CITY RESPONSIBILITIES
4.1 In addition to the specific responsibilities hereinbefore described, the CITY will:
A. Advise the ENGINEER of his requirements for the project and designate a
person to act as the CITY's representative with respect to the work to be
performed under this Amendment, and such person shall have complete
authority to transmit instructions, receive information, interpret and define the
CITY's policies and decisions pertinent to the work covered by this'Amendment.
B. Obtain and provide data requested that is reasonably available on the project
along with operational and maintenance requirements and easement and right-
of-way requirements.
C. Guarantee access to and make all provisions for the ENGINEER to enter upon
public and private lands as required for the ENGINEER to perform his work
under this Amendment.
D. Make facilities accessible for inspection.
E. Examine all studies, reports, sketches, schedules, and other documents
presented by the ENGINEER and render decisions pertaining thereto within a
reasonable time so as not to delay the work of the ENGINEER.
F. Assist in obtaining approval of all governmental authorities having jurisdiction
over the project, and such approvals and consents from such other individuals
or bodies as may be necessary for completion of the Project.
G. Furnish or direct the ENGINEER, in writing, to provide at the CITY's expense,
any subconsultant services not designated in Section 2, if advised by the
ENGINEER and CITY concurs that they are necessary.
H. Furnish, or direct the ENGINEER, in writing, to provide at the CITY's expense,
necessary additional services as stipulated in Section 3 of this Amendment, or
other services as required.
I. Provide such legal, accounting, financial and insurance counseling services as
may be required for the project, and such auditing services as the CITY may
require.
J. Give prompt written notice to the ENGINEER whenever the CITY observes or
otherwise becomes aware of any defect in the Project.
SECTION 5
PAYMENT
5.1. Payment for services and expenses of the ENGINEER are to be as set forth below.
The ENGINEER agrees to perform the work outlined in this Agreement for a lump
sum fee as indicated in the following table.
Soils Subconsultant $3,250
Survey Subconsultant $5,000
Electrical/Mechanical Subconsultant $20,500
Civil/Environmental Engineer $80,750
5.2. The OWNER will make prompt monthly payments in response to ENGINEER's
monthly statements without retention for all categories of services rendered under
this Agreement.
5.3. Charges for the services rendered by principals and employees as witnesses in any
litigation, hearing or proceeding will be computed at a rate of $1,200 per day or any
portion thereof (but compensation for time spent in preparing to appear in any such
litigation, hearing or proceeding will be computed in accordance with the payment
method as set forth herein).
5.4 If this Agreement is terminated during prosecution of the services prior to
completion of the services of Section 2, payments to be made in accordance with
Section 5 on account of that and all prior work under this Agreement shall be due
and payable, and shall constitute total payment for services rendered. In addition,
upon termination, the ENGINEER shall be paid for any additional services
authorized and rendered under Section 3.
SECTION 6
GENERAL CONDITIONS
6.1. Since the ENGINEER has no control overthe cost of labor, materials, or equipment
or over any construction method of determining prices, any opinion of probable
construction cost which may be provided in the services of this Amendment are
made on the basis of his experience and qualifications and represent his best
judgment as a design professional familiar with the construction industry, but the
ENGINEER cannot and does not guarantee that the construction cost will not vary
from opinions of probable construction cost prepared by him. Similar limitations
apply to construction schedules reviewed or prepared by the ENGINEER.
6.2. The CITY and the ENGINEER each binds himself and his partners, successors,
executors, administrators and assigns to the other party of this Agreement and to
partners, successors, executors, administrators, and assigns of such other party in
respect to all covenants ofthis Amendment. Nothing herein shall be-construed as
creating any personal liability on the part of any officer or agency of any public body
which may be a party hereto, nor shall it be construed as giving any rights or
benefits hereunder to anyone other than the CITY and the ENGINEER.
IN WITNESS WHEREOF, the parties hereto have made and executed this Amendment
the day and year first above written.
CITY:
City of Sanford, Florida
ATTEST& SEAL
ENGINEER:
CPH Engineers, Inc
ATTEST & SEAL
DATE David A. Gierach, P.E.
President