Exh 4BAGENDA ITEM # 4B
OCTOBER'23, 2002
CITY OF ATLANTIC BEACH
CITY COMMISSION MEETING '
STAFF REPORT
AGENDA ITEM: Aerated Sludge Holding Tank at Wastewater Treatment
Plant No. 2 ~ ~~
Bid No. 0102-22 -Rebid ~ ~ ~ ,~
SUBMITTED BY: Donna Kaluzniak, CEP,. Utility Director
DATE: October 21, 2002
BACKGROUND: During construction of the modifications at. Wastewater
Treatment Plant No. 2, located at,739 Wonderwood Road, the two existing sludge
holding tanks were found to be severely corroded .and preliminary plans were
made to take the tanks out of service and construct replacement tankage.
Prior to Gannett Flemings completion of the tank design, .Camp, Dresser &
McKee (CDM) was authorized to conduct a solids handling analysis to determine,
if there were more efficient methods for the City to store, treat, dewater and
transport wastewater biosolids, while ensuring the plants had•adequate solids
.handling capacity to allow them to meet DEP effluent limits, which was
appearing to become a problem at Wastewater Plant No. 2.
CDM's final recommendation was to construct two 90,000-gallon sludge tanks
and a thickener at Wastewater Plant No. 2. Biosolids from Wastewater Plant No.
2 are hauled to • Wastewater Plant No. 1 for treatment, dewatering and disposal.
.The thickener would reduce the number of transport trips between the two
treatment plants. The total estimated cost for the thickener, sludge tanks,' and
roadway improvements at the plant was $1,145,000, and these items were placed.
iri the 10-Year Capital Improvement Program (CIP).
~'~~~ ~ .A$er the restructuring of the Public Utilities Department, division directors,
.supervisors and operators were asked to think about innovative ways to save costs ~ .
or increase effectiveness.. After studying the existing sludge handling equipment, ,
the CDM report, and preliminary tank design, staff recommended the possibility
of using two modified roll-off containers designed by one of the plant supervisors. ~.
. ~ These containers are ,constructed with a false bottom consisting of wedgewire
' drying bed tiles. Instead of constructing a belt or centrifuge thickener for an
estimated cost of $540,000, the modified containers could be used to thicken the
sludge and reduce costs for transporting solids from Wastewater Plant No. 2 to. ,
.. Wastewater Plant No. 1. 'The reduced transport costs would save approximately
$12,000 per year.
In addition, staff decided to request a second opinion on whether the existing
tanks could be rehabilitated instead of constructing a second new tank. HGTI,
1
AGENDA ITENI.# 4B
.OCTOBER 28, 2002
Inc. performed an inspection of the tanks and recommended the City request bids
for rehabilitation of the tanks, and provided an estimated cost of $50,000 for this
tivork. This will allow a savings of approximately $225,000 that would have been
needed for a second new sludge tank.
Gannett Fleming designed the new sludge holding tank, and City staff instructed ' .
the engineer to include a concrete pad, and sludge and polymer pumping system
in the plans, for use with the modified roll-off containers. This project also
.includes raising the plant roadway to prevent a continuing serious flooding .
problem.
Bids for the project were advertised and sent to 17 bidders, but only one
contractor submitted a prequalification package and provided a bid. Sawcross
Construction, Inc. bid the project in the amount of $539,400.00, and on
' September 9, 2002.the City Commission rejected this sole bid, authorized staff to
re-bid the project and approved amid-year budget modification if a contract was
awarded in FY03.
.The project was re-bid, and five bidders prequalified and attended the mandatory
pre-bid meeting on October 11, 2002. One bidder was unable to submit due to
scheduling constraints, and bids were received from the following four bidders on
October 16, 2002: .
Item
No. Description .
~ Sawcross
Construction,.
Inc. Gruhn May,
Inc. Meadors
Construction
Co. Ortega
Industrial
Contractors
1 Slud e Tank $121,000.00 $152,000.00 $140,000.00 $231,702.00
2 Pump, polymer system,
dewaterin ad $65,000.00 $110,000.00 $65,000.00 $80,000.00
3 Blower acka =e $68,000.00 $73,200.00 $60,000.00 $60,000.00
4 Su ernatant decanter $13,000.00 $19,850.00 $32,000.00 $10,000:00
5 Yard i in $40,000.00 •$49,700.00 ~ $109,000.00 $50,000.00
~6 Yard work $166,900.00 $22,000.00 $52,000.00 $40,000.00
7 'Raisin roadwa $48,000.00 $84,300.00 $66,000.00 $60,000.00
8 Lab testin allowance $1,000.00 $1,000.00 $1',000.00. ~ $1,000.00
Total Base Bid $522,900.00 $SI2,OS0.00 $525,000.00 $532,702.00
Alt. Bid-'/<" Steel~Tank
-Painted $139,000.00 $150,000.00 $150,000.00 $250,000.00
Alt. Bid- Stainless Steel
Tank $150,000.00
'~ NO BID ~ NO BID ~ ~ NO BID
'Alt. Bid- Concrete
Prestressed Tank $130,000.00
' . NO BID NO BID ~NO BID
BUDGET: The engineer's estimate (and FY02 budget) for the sludge tank and
roadway work was $330,000. Bids were higher than the estimate due to
underestimated tank and excavation costs as well as the additional scope for the
polymer and sludge pumping facilities. However, the additional cost is more than
2
AGENDA ITEM # 4B
OCTOBER 23, 20D2
compensated for within the 10-year CIP due to elimination of the thickener and
second new tank. ~ .
Because the original bid was received and rejected after the FY03 budget
submittals, no funds were budgeted in the current fiscal year. However, when the
Commission authorized the re-bid, they approved amid-yeaz budget.modification
if the project. was awazded during FY03. Funds will be appropriated in a mid-
year budget modification to the Sewer Fund Account No. 410-5508-535-6300.
~RECOMNIENDATION: Award the contract for Aerated Sludge Holding Tank
Wastewater Treatment Plant No. 2 to Gruhn May, Inc. in the amount of
$512,050.00, and authorize staff to transfer funds during amid-year budget ••
modification.
ATTACHMENTS: 1. Bid Tabulation Form
2. Award Recommendation L er from Gannett Fleming
REVIEWED BY CITY MAN
.~ 3
..AGENDA ITEM # 4B . '
OCTOBER 23,.2002
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OCT-18-2002 FRI 01 29 PM GANNETT F1EMIh1G JAX
Gannett Fleming
• ~ AGENDA ITEM # 4B ~~
FAX N0, 904 332 933T oCTOR;;~f~s, 2002
GANNETT FLt_!-IING, INC.
Suite 150 .
7751 BeHort Parkway
Jacksonville, FL 32256
• aftlce: (90d) 332-9400 '
• Fvc: (904) 33Z-9337
Yrww.cJannelltteRUng.com
October 1 S, 2002
.Ms. bonne V. Kaluznial: ~ - • .
Utility Director
City of Atlantic Bcach - '
" 1200 Sandpiper Lisle ~ •
ltiilantic Bcach, 'Nlorida 32233
Re;' Sludge HolduZg Tank Facilities
Wastewater Trcalnient Plant No. Z ~ ~ .
City of Atlantic Beach •
Atlantic Bcach Bid No. OI02-22 Rebid
.. c.~c~t Na. 3golz.~os
hear Ms, Kaluzniak:
'. On October 1G, 2002, the City of Atlantic Bcach received bids on the zeferenced project. ,
The font bids.wcre as follows: .
• Gruhn May, Tnc. • . $512,050.00 -
Sawcross, Tnc. ~ $522,900.00 "
• Mcadors Constriction Co.; Tnc. $525,000.00 ,
. Oricba Industrial Contractors $532,702.00
Gannett •Plcming's review of the bid proposal documents indicates that all bid an: •
contplctc with the exception of Sawcross, lne., which failed to acknowledge the addenda .
and include the bid checklist. Gruhn May, lac, is the lowest resporisivc and responsible
bidder and Gannett rleming hereby recommends award to Gruhn May, lac.
If you have any questions, please do not hesitate to contact me.
Siuccrcly,
GAN'Nr,T1' FLEMING, INC. ~ •
<~~ . • .
~~`
• Thomas C. Hawk, P.E.
• Manaber-Muiucipal Engineering Services •
Lncl. •
ra.tircnrMrunar:c~v><oornror:~r~,..~:,wrur,~zb,A '1'1'Q(fTllPlf Of I~1'CCI~CJICC
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