HomeMy WebLinkAboutItem 3d - City's Water Supply DisinfectionlYr
SIMON-
DATE: June 3, 2014
TO: Honorable Mayor and City Council
STAFF REPORT
Public Works Services Department
FROM: Tom Tait, Public Works Services Director
By: Craig Clark, Utilities Superintendent
SUBJECT: EXTENSION TO THE PURCHASE ORDER WITH WATERLINE
TECHNOLOGIES, INC. FOR THE PURCHASE AND DELIVERY OF
SODIUM HYPOCHLORITE FOR THE DISINFECTION OF THE CITY'S
MUNICIPAL WATER SUPPLY IN THE AMOUNT OF $49,785
Recommendation: Approve
SUMMARY
The disinfection of drinking water by public water agencies is essential to eliminating
water quality problems. The City's water system utilizes liquid sodium hypochlorite to
disinfect groundwater pumped from the groundwater basin. Waterline Technologies,
Inc. is reaching the end of the first extension and has agreed to hold their prices for
another year. All remaining terms and conditions of the original purchase order will
remain in effect.
It is recommended that the City Council approve a one year extension to the purchase
order with Waterline Technologies, Inc. for the purchase and delivery of sodium
hypochlorite to be used for the disinfection of the City's municipal water supply in the
amount of $49,785.
DISCUSSION
The City's municipal water supply system permit from the California Department of
Public Health (CDPH) specifies that the City's water system use chlorination as a
means of disinfection. Gaseous chlorine had been the standard for municipal water
disinfection for many years. However, safety concerns related to the hazardous and
corrosive nature of chlorine gas prompted the Public Works Services Department to
convert the disinfection system over to liquid sodium hypochlorite. Liquid sodium
hypochlorite (commonly referred to as chlorine bleach) is much less hazardous to work
with than gaseous chlorine, and it has the same effect and residual protection as
chlorine gas. The liquid sodium hypochlorite is delivered in bulk to the City's well sites
and stored onsite where it is then injected into the distribution system using precision
Purchase Order Extension - Sodium Hypochlorite
June 3, 2014
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metering devices to assure the proper concentration of disinfectant. These
concentrations are monitored on a daily basis by the City's Water Production
Technicians.
On June 19, 2012, the City Council approved a purchase order with Waterline
Technologies, Inc. for the purchase and delivery of liquid sodium hypochlorite to be
used for the disinfection of the City's municipal water supply. Annually, the City
purchases approximately 40,000 gallons of sodium hypochlorite. Last year, the City
Council approved its first purchase order extension in the amount of $49,785. Waterline
Technologies, Inc. has reached the end of their first extension and has submitted a
written offer to extend the existing purchase order for an additional one year with no
increase in unit cost. Waterline Technologies, Inc. has provided excellent service
during the term of the purchase order.
FISCAL IMPACT
Sufficient funds have been budgeted in the Fiscal Year 2013 -14 Water Operations
Budget for the purchase of bulk liquid sodium hypochlorite. Funds for the Fiscal Year
2014 -15 portion of the purchase order extension have also been included in the
proposed budget.
RECOMMENDATION
It is recommended that the City Council approve a one year extension to the purchase
order with Waterline Technologies Inc. for the purchase and delivery of sodium
hypochlorite for the disinfection of the City's municipal water supply in the amount of
$49,785.
Approved:
Dominic Lanza
City Manager