HomeMy WebLinkAboutItem 15 - Wastewater Lift Station Re-Lining ProjectMEMO TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: BRUNO RUMBELOW, ACTING CITY MANAGER"6V
MEETING DATE: JUNE 21, 2005
SUBJECT: WASTEWATER LIFT STATION RE -LINING PROJECT
RECOMMENDATION:
City Council to consider award of Engineering Services Contract to DeltaTek
Engineering in the amount of $21,602.00 for the design and inspection of new linings for
three wastewater lift stations, authorize staff to execute said contract and take any
necessary action.
FUNDING SOURCE:
Funds are available from the Wastewater Permanent Capital Maintenance Fund (WW-
PCMF).
Funding Source Account Amount Award Percent
WW PCMF
TOTAL
Budget
Engineering Fees
Construction
Miscellaneous Expenses
Contingency
TOTAL
BACKGROUND:
200-43370-534-0 $202,744.40 $21,602.00 100.0%
$202,744.40
$21,602.00 100.0%
Amount
Award Percent
$21,602.00
$21,602.00 10.7%
$169,142.40
83.4%
$2,000.00
1.0%
$10,000.00
4.9%
$202,744.40 $21,602.00 100.0%
Hood Lane, Hilton and Minters Chapel sewage lift stations have suffered wet well
degradation and are in need of rehabilitation. Hydrogen sulfide gas (H2S) "sewer gas" is
a by-product of waste material and is present in sewage handling facilities. Hydrogen
sulfide converts to sulfuric acid when it comes in contact with water and is very
corrosive. Over time the corrosive action of the sulfuric acid degrades the concrete,
jeopardizing the structural integrity of the sewage lift station wet wells.
June 13, 2005 (3:53PM)
This project will address the re -lining of the wet well walls at the above-mentioned lift
stations. The sewage will be conveyed by a by-pass pumping system and the wet wells
of each station will be sandblasted and re -coated with an epoxy coating system that is
resistant to the sulfuric acid corrosion. The process will lengthen the useful life of the
concrete structures of the respective stations.
DeltaTek Engineering is a company that specializes in coating system design and
inspection. They have provided this service to the City of Grapevine for a number of our
elevated water storage tanks and have done an excellent job.
Staff recommends approval of the design contract and inspection services in the amount
of $21,602.00. The total estimated cost of the project is $169,142.40, with a
contingency of $12,000, bringing the total project cost to $202.744.40.
MI;
June 16, 2005 (10:35AM)
4�4TATES
Deltatek Engineering
May 18, 2005
Mr. Robert H. Price, P.E.
Assistant Director Public Works Department
Operations/Internal Services
City of Grapevine
501 Shady Brook Drive
Grapevine, Texas 76051
Reference: Wastewater Lift Station Improvements
Scope of Service and Cost Proposal
City of Grapevine
Dear Mr. Price:
In response to your request, and in accordance with our meeting of May 16, 2005,
Deltatek Engineering is pleased to submit the attached proposal.
Should you have any questions, please call me at 469-374-9800.
Sincerely,
DELTATEK ENGINEERING
Bahram Niknam. P.E.
Attachments
14114 Dallas Parkway, Suite 480, Dallas, Texas 75254
(469) 374-9800 Fax (469) 374-9801
email: bn@deltatekeng.cem
Scope of Services
And
Cost Proposal for Rehabilitation of
Hilton Lift Station
Minters Chapel Lift Station
Hood Lane Lift Station
City of Grapevine
May 18, 2005
Scope of Services
Hilton Lift Station
The Hilton Sewage Lift Station is wet/drywell type construction. This facility consists of
two (2) wetwells with one currently in service and one for future operations. The
wetwells constructed of reinforced concrete equipped with roof access hatches. The
interior of the wetwell is coated with a protective coating system. The existing coating
system is delaminating and blistering. This station also uses a power fan -forced odor
control unit at site. The purpose of this improvement is to review the existing condition of
wellwell interior concrete surfaces and provide plans and specifications for resurfacing
the pitted concrete with material (s) suitable for this application. The scope of this task
shall concentrate on concrete surfaces affected by chemicals in the domestic/industrial
wastewaters.
Hood Lane Lift Station
The Hood Lane Sewage Lift Station is a steel construction wetwell. The interior of this
wetwell is coated with a protective coating material. The protective coating system is
delaminating and number of blisters noted.
Minters Chapel
The Minters Chapel Sewage Lift Station is wet/drywell type construction. This facility
consists of one (1) wetwell. The wetwell constructed of reinforced concrete equipped
with roof access hatches. The interior of wetwell is coated with protective coating
system. The existing coating system is delaminating and blistering. The purpose of this
improvement is to review the existing condition of wetwell interior concrete surfaces and
provide plans and specifications for resurfacing the pitted concrete with material (s)
suitable for this application. The scope of this task shall concentrate on concrete surfaces
affected by chemicals in the domestic/industrial wastewaters.
Renovation
Hilton Lift Station: $59,844.00
Minters Chapel: $42,264.00
Hood Lane: $23,844.00
Bypass (Hood $ Minters Chap.): $15,000.00
Subtotal: $140,952.00
Overhead/profit C 20%: $28,190.40
Total Renovation: $169,142.40
Engineering/Inspection
Plans/Specs: $13,602.00
QA/QC: $8,000.00
Total EnWInsp: $21,602.00
Total budget: $190,744.40
Renovation Schedule
Preliminary plans and specifications: 30 days after notice to proceed
Review by City:
7 days
Final plans
7 days
Advertise:
28 days
Award:
21 days
Notice to proceed:
30 days
Work complete:
60 days
Total:
183 days
Should you have any questions, please call me at 469-374-9800.
Sincerely,
DELTATEK ENGINEERING
*Non
Bahram Niknam, P.E.
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