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Meeting Date: April 19, 2016
STAFF REPORT
AGENDA ITEM: Resolution Approving the Purchase and Installation of Variable Frequency Drives (VFDs) at Wells No. 8 and 16.
MEETING DATE: April 19, 2016
PREPARED BY: Alfonso Manrique, Alternate City Engineer
REVIEWED BY: Odi Ortiz, Interim City Manager
RECOMMENDATION:
City Council to adopt Resolution No. 2016-_, approving the purchase and installation of Variable Frequency Drives (VFDs) at Wells No. 8 and 16 from Telstar Instruments.
BACKGROUND:
Recent TCP sample results at Well No. 14 indicate a concentration that exceeds the response level (RL) established by the State Water Resources Control Board Division of Drinking Water (SWRCB-DDW). If a chemical is present in drinking water that is provided to consumers at concentrations greater than the RL, the SWRCB-DDW recommends that the drinking water system take the source out of service.
The RL for TCP is established 0.5 ppb or 100 times the notification level (NL). Sample results at Well No 14 indicate a concentration as high as 0.69 ppb.
The City has notified consumers about the presence of TCP in the groundwater provided by City wells. In addition, due to the elevated concentration of TCP at Well No. 14 the Interim City Manager ordered staff to remove Well No. 14 from service.
The elimination of Well No. 14 is causing significant variations in the distribution system pressure. The pressure swings create erratic responses by the SCADA to tum wells on and off. The pressure variations are caused by the rapid changes in flow demands by Foster Farms and other large users.
In order to remove Well No. 14 completely from the system and avoid large variations in pressure staff recommends the installation of VFDs at Wells No. 8 and 16. Until the VFDs are furnished and installed, Well No. 14 must remain in operation for shorts periods of time to sustain pressure in the system.
This project is considered to be an emergency caused by the deterioration of the groundwater quality produced by Well No. 14. Well No. 14 is recommended to be permanently out of service until treatment is provided to remove TCP from the groundwater produced by this well.
DISCUSSION:
Considering the emergency nature of this project, City staff solicited proposals from three qualified contractors to furnish and install VFDs at Well Nos. 8 and 16. The following proposals have been received:
Contractor Name |
Well #8 |
Well #16 |
Total |
Telstar Instruments |
$17,800 |
$18,800 |
$35,800 |
Tesco Controls |
$39,210 |
$40,628 |
$79,838 |
Howk Systems |
$30,693.88 |
23,268.88 |
53,962.76 |
Staff has reviewed the three proposals and finds Telstar Instruments to be the lowest qualified bidder for this emergency project.
FISCAL IMPACT:
The City has not specifically budgeted for the purchase of this equipment and it is considered to be an emergency caused by water quality deterioration at Well No 14. The City budgeted under the Water Emergency Contingency Fund area the amount of $100,000.00 to cover unexpected emergencies. The total cost for the equipment and installation is $35,800.00 plus taxes. The installation of VFDs at Wells No. 8 and 16 will provide some energy savings at these two sites. However, staff has not quantified how much the energy savings will amount to.
ATTACHMENTS:
1. Resolution No. 2016-
2. Telstar Instrument Proposal
3. Tesco Controls Proposal
4. Howk Systems Proposal
RESOLUTION NO. 2016-
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF LIVINGSTON DECLARING AN EMERGENCY IN THE WATER SYSTEM CAUSED BY THE DETERIORATION OF THE WATER QUALITY AT WELL NO. 14 AND APPROVING THE PURCHASE AND INSTALLATION OF VARIABLE FREQUENCY DRIVES (VFDs) AT WELL NOS. 8 AND 16 AND AUTHORIZING THE CITY MANAGER TO ISSUE A PURCHASE ORDER TO THE SELECTED CONTRACTOR