R01-233RESOLUTION NO. R01- ~3~
A RESOLUTION OF THE CITY COMMISSION OF THE
CITY OF BOYNTON BEACH, FLORIDA,
AUTHORIZING THE MAYOR AND CITY CLERK TO
EXECUTE TASK ORDER NO. 10 BETWEEN THE
CITY OF BOYNTON BEACH AND CYI2M HII,I, IN THE
AMOUNT OF $14,667.00 ENGINEERING SERVICES
ON THE HYDRAULIC EVALUATION TO MASTER
LI~T STATION 356; AND PROVIDING AN EFFECTIVE
DATE.
WIIEREAS, Master Lift Station 356 is located at the east end of Boynton Beach
next to the new stormwater pond; and
WHEREAS, this Task Order will provide engineering sermc¢ for the hydraulic
of Lift Station 356, and to recommend options for re olving the pump
with the existing lift station configuration;
NOW, TItEREFORE, BE IT RESOLVED BY TIlE CIT~ COMMISSION
CITY OF BOYNTON BEACH, FLORIDA, THAT:
Section 1. The City Commission of the City of Boynton ~
authorize and direct the Mayor and City Clerk to approve and {
o. 09 for CH2M Hill in the mount of $14,667.00, for engineeri
hydraulic evaluation to Master Lift Station 356.
Section 2. This Resolution shall become effective immedia rely upon passage.
~ach, Florida does
xecme Task Order
~g services on the
Task Order No.10
May 14, 2001
Engineering Services for the Hydraulic Evaluation of Master Lift
Station No. 356.
A. Background
Lift Station (LS) 356 is a master wastewater lift station for the City of Boy
that has been experiencing problems during normal pump operations. T1
were redesigned in 1994. The current lift station configuration consists ot
each capable of handling peak flow, with a smaller j,ockey pump to hand
According to the CITY, the existing large pumps have been experiencing
due to cavitation, Net Positive Suction Head Requirements (NPSHR), an~
aton Beach (CITY)
e pumps at LS 356
two large pumps,
e low flows.
>roblems possibly
tor suction side
velocity issues. The CITY is also concerned that the large pumps vibrate qxcessively during
starLup..All of the pumps in this lift station have experienced down-tire, due to mechanical
failures. The CITY is interested in replacing the existing pumps, using either the existing
pump configuration or by completely, reconfiguring the lfft. station. The ~ has asked
cH2M~ILL (ENGINEER) to recommend new pumps and a pumping configuration for Lift
Station 356.
The services proposed under this task order by CH2MHILL will be to provide engineering
services/or the hydraulic evaluation of Lift Station 356 and to recommea~ :1 options for
resolving the pump problems associated with the existing lift station con figuration.
B. Scope of Services
The specific services to be provided by the ENGINEER are as follows:
Task I -Hydraulic Evaluation
The ENGINEER will evaluate the hydraulics of LS 356. This evaluation · ,ill include the
following:
A- Data Gathering and Collection
The first step in a hydraulic evaluation is to examine the existing lift stat on system
configuration. The ENGINEER will work closely with CITY staff to asse xxble all existing
information. The steps in this task include:
· Obtain historical pump station flow records.
· Measure wet well dimensions during pump operations.
The ENGINEER will instruct the CITY how the pump station must t operated during
the study to obtain accurate data.
· Assemble information regarding the service population and sewage low rates to the
South Regional Wastewater Treatment Facility.
DFB/981660007/LSB651 .DOC
B - Hydraulic Stud~
After the exlsl~ng irtformation is collected the next step is to collect data dtm~rt, g normal lift
station operation. Approximately 2 weeks of data collection is necessary to determine lift
stationinfluent and effluent parameters. The steps in this task include:
· Using pttmp station flow monitoring equipment, estimate the average inflow into LS
356 and evaluate pump capacities. An ISCO 4501 Pump Station Flow Monitor with
Pump]ink software will be used. A Barksdale Pressure Transmitter wRl also be used to
evgluate system pressures. A Panametrics PT868 Clamp-On Flow Me~er with TDM
software will also be used to verify flowrates and pump capacities.
· The ENGINEER will acqnire all of the monitoring equipment.
· Pump curves for the existing pumps at LS 356 will be used in develop~g a system
curve. The CITY will provide the pttmp information.
· The ENGINEERwitl coordinate with CITY staff the instaflation of all necessary
instrttmentatiort used dttting the hydraulic study.
* The Ertg~neer will conduct site visits approximate2y every other day to collect data from
the rec .~?mg instrum~_nts, check that the equipment is operating properly, and confirm
that station operating protocol hagnot been modified.
· Pressure and flow readings willb~ compared to existing pump curves and historical
Lrfformatiort to co~firm that the measurements are consistent.
C - Data Analysis
The final st~p in the hydraulic study is analyz~ng the data collected. The ~ollowing steps are
associated with this task:
· Based on the data collected, the ENGINEER will estimate mmimttm, ~,aximum, and
average irtfluent flow rates. The maximum flow will be based on standard peaking
factors and compared to maximum flow observed during the testing.
· The ENGINEER wilt develop a system curve for the lift station.
· The ENGINEER will evaluate starts per hour observed during the testing and calculate
theoretical pump starts per hour based on wet well volume, peak flow rates and
recommended pm-ap flow rates.
· The ENGINEER will recommend pump operating scenarios that will permit pump cycle
times to conform to the manufacturers recommendations.
· Based on the system curve and the pump operating scenario the ENGINEER will
recommend new pumps for LS 356.
· The evaluation will include only an analysis of LS 356. The evaluation will not include
an analysis of what effect these modifications will have on other lift stations.
· The ENGI1N-EER will prepare a draft technical memorandum descn~b.ing the
background, methodology, and results of this evaluation, and furnish five copies of the
memorandttm to the CITY for review. The £ITY's review comments will then be
incorporated into a final technical memorandum. Five copies of the ~evised
memorandum will be delivered to the CITY.
DFB/981660007/LSB65 I.DOC 2
C. Additional Services
The ENGINEER will provide additional services beyond the scope as authorized by a
separate task order or an amendment to this task order. Additionalservices may include,
but are not limited to, the following:
Addifiorral design services, bid phase services or services during construction related to
the rehabilitation of LS 356.
· Services for a comprehensive hydraulic evaluation of the entire force main network.
· Claims, litigation or other controversy in connection with this project,
D. Assumptions
The following assumptions have been made in preparing this scope of services and
compensation:
The entfi:e Boynton Beach conveyance system will not be evaluated. Only lift station 356
will be evaluated.
· Cost estimates for the modifications recommended under the hydraulic evaluation
services task will not be prepared.
· The existingpiping and station infrastructure is assumed to be in satisfactory condition.
E. Obligations of the CITY
Obligations of the CITY include:
· The CITY will provide the ENGINEER access to the site.
· The CITY will provide the ENGINNER with CITY Staff to help install the
instrumentation and equipment necessary to perform the hydraulic evaluation, and
ensure that CITY Staff is available to accommodate the ENGINEER during data
gathering and collection.
F. Compensation
Compensation by the CITY to the ENGINEER will be on a lump sum b~asis. The estimated
compensation for the services described in this Task Order is $14,667. The table below
summarizes the estimated costs anticipated for this task.
DFB~81660007/LSB651 .DOC 3
Lift Station 356 Hydraulic Evaluation Cost Estimate
Hours
Labor
Costs Expenses Total
Task 1-Hydraulic Evaluation
A- Data Gathering and Collection
B - Hydraulic Study
C - Data Analysis
20 $1,436 $264 $1,700
68 $4,739 $3,439 $8.198
60 $4.307 $472 $4,779
Total 148 $10,482 $4,196 $14,667
G. Schedule
The services to be provided under this Task Order have already been~ completed and the
final deliverables will be submitted to the CITY upon approval of th~s Task Order.
APPROVED BY:
CITY OF BOYI~ON BEAC ~H, FI~RIDA
~(erald Broe(ning, Mayor
Dated this ~1 day of ~ 2001.
SUBMI'ITED BY:
CH2M HILL, INC.
By:
Thomas M cCo,~/.ck, P G.
Vice Preset, Area Manger
Dated this I~ day of ~v..~.%~" · 2001.
CITY ATTORNEY
DFB/981660007/LSB651.DOC 4