HomeMy WebLinkAboutAgenda Report - August 19, 1987 (77)1: 1 - NCl'L
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ICITY L ODI
` PUBLIC WORKS DEPARTtAENT
COMMUN-1 CATION
Project Dati
TO: City Council Originally Budd` 1987/88
Budgeted Fund: Wastewater Capital
FROM: City Manager Outlay (17.2)
Amount Budgeted: $175,000
MEETING DATE: August 19, 1987 Total Project Estimate: $148,900
AGENDA TITLE: Approve Purchase of Aeration Diffusers for White Slough
Treatment Facility
RECOMMENDED ACTION: That the City Council approve the purchase of aeration
diffusers from the Parkson Corporation, the sole supplier, in the amount of
$86,464.20.
BACKGROUND INFORMATION: In the 1987/88 Capital Improvement Program being
approved by the City Council at its August 19 regular meeting, is $175,000
'or aeration improvements.
It has been determined from experimental installation of Parkson's aeration
diffusers that if 6", of the existing diffusers are replaced at this time,
the City can obtain � 45% improvement in air distribution. This would
incraase the plant capacity and alleviate the need for a sewer morit riuri
prior to the plant expansion. We have had Parkson aeration diffusers in
place on an experimental basis since December 1986 and have had no problems
with reduced porter consumption. The attached letter from Black and Veatc'►
indicates that Parkson. Corporation is the sole supplier' of arp oven
aeration diffuser. For this reason, along with the need for standardization,
we are requesting Council approval of the aeration diffusers necessary to
change out all three of our existing aeration basins.
The plant was designed for 5.8 million gallons per day ai.d we currently have
a flow of approximately 6.1 million gallons per day. It is important that
this modification be done as soon as possible. Because of the long delivery
time, we are rt.�ommending purchasing the materials directly from the supplier
and furnishing them to a contractor for installation. Black and Veatch is
currently preparing the installation specifications and we will be going out
to formai bid on this work.
A breakdown of the total aeration project costs is as follows:
Material purchased, FOB Lodi
Installation by formal contract
Engineering and inspection
APPROVED:
TOTAL
Yt t tKJUN, U1
$86,500
50,000±
12,400
$148,900
3naoer
FILE NO.
CAERATIO/TXTW.02M August 11, 1987
Pity Council
August 19, 1987
Page ?
The Cit,,'s Purchasing Officer has approved this proposal'
/ -
Ju ' Rnnsko
\ Publf� Works Director
� /
JLR/ma
Attachment
cc: Finance Director
Put -chasing Officer
Water/WastewF.ter Superintendent
�
«
BLACK & VEATCH
ENGINEERS -ARCHITECTS
Proposal for Engineering Services
for Retrofit of Aeration Diffusers
at White Slough Water Pollution
Control Facility
City of Lodi
221 West Pine St.
Lodi, CA 95240
Attention: Mr. Jack L. Ronsko
Director of Public Works
Gentlemen:
.. --
TEL`4t5)
3470 BUSK!RK AVENUE
PLEASANT HILL. CAL!FORN!A 9145-23
MAILING ADDRESS: P O. BOX 4247
WALNUT GREEK• CALIFORNIA 94496
B&V Project 83245.506
July 27, 1987
The Parkson Corporation is the sole supplier of proven medium bubble
aeration diffusers. Other companies are currently marketing medium bubble
diffusers based on German technology and patents. Unfortunately, we do
not have long term operating data for these other suppliers so cannot
really evaluate long term maintenance costs for their units.
Because of the above facts, we recommend the City purchase the diffusers
directly from Parkson. We can obtain a firm price from Parkson prior to
your issuing a purchase order. We can evaluate the fairness of the price
at that time. Should you re wire a bid from them, we could obtain a firm
,t price before their bid and use the leverage of otherSujpliers to insure a
fair price. 1%42, 'bete. �D`1Q.•
An additional benefit is that purchase -installation separate contracts
allow for more positive scheduling of plant shut -down for installation.
Very truly yours,
BLACK 6 VEATCH
Kenneth D. Jones
Regional Manager
adg
Enclosure