SS9901-CS000512 (3) EXHIBIT A
SCOPE OF SERVICES
COPPELL, TEXAS
DEFOREST WASTEWATER LIFT STATION
AND FORCE MAIN IMPROVEMENTS
0.0
1.0
GENERAL
0.1 Project Description
The services to be provided for this project include preparation of a preliminary
design report for the improvements to be made to the DeForest Wastewater Lift
Station and force main facilities. The services include:
· Evaluation of the capacity of the existing pumping facilities to meet
pumping requirements in the year 2020 at the wastewater lift station.
· Evaluation of the force main required to transfer wastewater from the
DeForest Lift Station to the Sandy Lake Lift Station.
· Evaluate alternative routes for the force main in Samuel Street and
MacArthur Boulevard.
· Determine the odor control facilities to be provided at the lift station to
control odors.
0.2 Project Phasing
This project shall be performed in one phase. The Preliminary Design Report
phase includes data collection, evaluation of the existing facilities and
recommended improvements, and development of preliminary improvement
recommendations for the City's review and approval.
0.3 Design Standards
Design and preparation of construction drawings and technical specifications
required for the project shall be in accordance with the following standards.
a. North Central Texas Council of Governments (NCTCOG)
b. City of Coppell Design Standards.
c. City of Coppell Standard Drawings and Specifications.
d. Texas Natural Resources Conservation Commission (TNRCC)
Preliminary Design Report
1.1 Data Collection
Obtain available reports, plans, pumping records, flow records, zoning maps,
aerial photographs, master plans, and other data relevant to the project from the
City.
1.2
1.3
1.4
1.5
Design Meeting
Meet with the City of Coppell staff to review and discuss the preliminary design
criteria, operational concerns, and other preliminary data. The Engineer shall
prepare a record of the preliminary design meeting and distribute it to all
attendees.
Evaluation of Existing Facilities
Evaluate the existing lift station facilities, force main, and gravity sewers affected
by the proposed improvements.
Ultimate Development of Drainage Basin
Determine the projected ultimate build-out date for the sanitary sewer drainage
basins A & F. The estimated date will be based on historical growth trends
provided by the City of Coppell
Determination of Required Pumping Capacity of the Lift Station
Determine the required pumping capacity of the DeForest Lift Station for the
ultimate build-out date of the drainage basin (Basins A & F in the 1994 Master
Plan) served by the lift station. The following tasks will be performed to
determine the required pumping capacity of the lift station:
Prepare an estimate of current wastewater flow based on existing land
use. This will include counting connections to the existing wastewater
collection system using existing block/lot development maps, zoning
maps and land use master plan provided by the City. Two field visits are
anticipated to verify land use.
Compare estimated flow rates with pumping records provided by the
City. Adjust the estimated flow rates as required to correlate with the
pumping records.
Review peak wet weather flows based on available past rainfall data and
wastewater flows. Estimate peaking factors based on rainfall data and
lift station pumping records provided by the City.
Using the peaking factors established above, estimate flows based on the
projected full development of Basins A & F.
Compare year 2020 and ultimate peak flow and pumping requirements
with the 1994 Master Plan projections and TNRCC existing and
proposed regulations.
f. Prepare a Task Report and review findings with the City.
1.6
1.7
1.8
Force Main Alternatives
Determine the size of the force main required to transfer wastewater from the lift
station to the Sandy Lake Lift Station. Evaluate alternative routes for the force
mains in Samuel Street and MacArthur Boulevard.
Lift Station Modifications
Develop pump/system head curves for the existing force main and lift station and
proposed improvements to the lift station and the alternative routes of the
proposed force main. Evaluate the following five alternatives for upgrading the
lift station and force main facilities.
Convert the existing DeForest Lift Station to a station using only
submersible pumps.
New force main in Samuel Street and new submersible pumps at the
DeForest Lift Station.
New force main in MacArthur Boulevard to the existing gravity sewer to
the Sandy Lake Lift Station.
New force main in MacArthur Boulevard to the existing Sandy Lake Lift
Station wet well using new submersible pumps at the DeForest Lift
Station.
New force main in MacArthur Boulevard to the existing force main out
of the existing Sandy Lake Lift Station using new submersible pumps at
the DeForest Lift Station.
Lift Station Electrical Schematics
Prepare preliminary electrical requirement schematics for the proposed
improvements to the DeForest Lift Station.
1.9 Odor Control
Review the odor control technologies available for use at the lift station and
recommend facilities to control odors at the DeForest Lift Station.
1.10 Cost Estimates
Develop capital and operating cost estimates for each of the proposed
alternatives.
1.11 Draft Report
Prepare a preliminary report of findings and recommendations and submit five
copies to the City for review and approval.
2.0
1.12 Review Meeting
Meet with City staff to review the preliminary report and address City comments
and concems.
1.13 Final Report
Modify report to include final comments provided by the City
1.14 Submittal
Prepare Final report and submit 10 copies to the City.
Schedule
The draft report will be completed and submitted to the City within three months of
receipt of the Notice to Proceed from the City. The final report will be submitted with
one month after receipt of comments from the City.
The following tasks are not included in the Contract:
· Flow monitoring
· Rain event monitoring
· Geotechnical investigations
· Field Surveying
EXHIBIT B
City of Coppell, Texas ~ ~'~ 05/12/o0
DeForest Wastewater Lift Station and Forc~ .in Improvements
P. RELIMINARY ENGINEERING
BASIC SERVICES
Prolect Project Staff Senior
TASK LISTING Manager Engineer Engineer Technician Technician Clerical TOTAL
1.0 Prelimina~/Desi[In Report
1.1 Data Collection 4 8 2 $1,100
1.3 Eva}uation of Existin9 Facilities 4 8 4 $1,700
1.4 Ur(imate Development of Basin 4 8 16 8 $3,0~0
1.5 Required Purnpin9 Capacity of Station
TC&S NON-LABOR ESTIMATE
NON-LABOR TOTAL ~ I $1,116
SUBCONTRACTOR SERVICES AND ADMINISTRATION
TOTALS II
~TOTAL ESTIMATE [~ II $56,426