HomeMy WebLinkAbout2008-06-24; Municipal Water District; 657; Approval of Plans and Authorize Bids for Construction of Maekle Disinfection Facilities Chlorine Gas Scrubbers Replacement Project No 5009ACARLSBAD MUNICIPAL WATER DISTRICT - AGENDA BILL
AB# 657
MTG. 06/24/08
DEPT. ENG
APPROVAL OF PLANS AND AUTHORIZATION TO
ADVERTISE FOR BIDS FOR THE CONSTRUCTION OF
MAERKLE DISINFECTION FACILITIES CHLORINE GAS
SCRUBBERS REPLACEMENT PROJECT NO. 5009-A
DEPT. HEAD £//?T71
CITYATTY. '(^H^-
CITY MGR. (/y^— -
RECOMMENDED ACTION:
Adopt Resolution No. 1327 approving plans and specifications for the construction of
Maerkle Disinfection Facilities Chlorine Gas Scrubbers Replacement Project No. 5009-A.
ITEM EXPLANATION:
Maerkle Dam reservoir and its auxiliary facilities are located in the northeast part of the City and are a
critical part of the potable water supply system for the City. Maerkle Dam reservoir (formerly known as
Squires Dam reservoir) was initially constructed in 1963. In the late 1980's and early 1990's, various
auxiliary facilities were added, including a 10 million gallon concrete storage tank, transmission
pipelines, a 33.5 million gallons per day pump station, and chlorination facilities.
In May 2007, staff commissioned a study to evaluate all the facilities at Maerkle Dam reservoir.
The study report identified 20 priority items that need replacement to meet current code requirements
for health and safety and to maintain reliability of this water supply source. These items were
presented to the Board via Agenda Bill No. 645 on December 11, 2007 and are summarized in Exhibit
2. Additional agenda bills will be presented to the Board for consideration as the plans and
specifications are completed and appropriate implementation schedule windows are identified.
This project involves high priority items 11 and 12, which replace the existing wet chlorine gas
scrubbers with new dry chlorine gas scrubbers. The existing chlorine gas scrubbers were constructed
in 1992. The existing units are requiring increased attention to remain operable and have reached the
end of their useful life. To minimize the risk of chlorine gas release to the surrounding areas, the
existing scrubbers need to be replaced with new scrubbers.
ENVIRONMENTAL IMPACT:
This project is a Class 2 categorical exemption (replacement or reconstruction of existing structures or
facilities) and is, therefore, exempt from environmental review pursuant to Section 15302 of the
California Environmental Quality Act (CEQA).
FISCAL IMPACT:
The Engineer's Estimate for the cost to construct the new dry chlorine gas scrubbers at Maerkle
Facility is shown in Table 1.
FOR CITY CLERKS USE ONLY
BOARD ACTION: APPROVED
DENIED
CONTINUED
WITHDRAWN
AMENDED
aana
CONTINUED TO DATE SPECIFIC D
CONTINUED TO DATE UNKNOWN D
RETURNED TO STAFF D
OTHER - SEE MINUTES D
DEPARTMENT CONTACT: Eva Plajzer 760-602-2787 eplai@ci.carlsbad.ca.us
Page 2
ITEM
Scrubbers Design Cost
Scrubbers Construction Cost
Contingency for Construction of Scrubbers (10%)
Inspection for Construction of Scrubbers (10%)
ESTIMATED TOTAL COST FOR SCRUBBERS
Design Cost for Remaining Items in Exhibit 2
Construction Budget for Remaining Items in Exhibit 2
Contingency Budget for Remaining Items in Exhibit 2
Inspection Budget for Remaining Items in Exhibit 2
ESTIMATED PROJECT TOTAL COST
CURRENT APPROPRIATION
ADDITIONAL APPROPRIATION NEEDED
ESTIMATED COSTS
$50,000
$550,000
$55,000
$55,000
$710,000
$175,000
$821,000
$82,100
$82,100
$1,870,200
$1,870,200
$0
Sufficient funds exist in the Water Replacement Fund to construct the chlorine gas scrubbers. There
are also sufficient funds for the remaining items in Exhibit 2.
Staff recommends approving the plans and specifications and authorizing the City Clerk to advertise
for bids for the construction of Maerkle Disinfection Facilities Chlorine Gas Scrubbers Replacement
Project No. 5009-A.
EXHIBITS:
1. Location Map.
2.
3.
Maerkle Dam Reservoir Facility Prioritization List.
Resolution No.1327 Approving Plans and Specifications and Authorizing to
Advertise for Bids for the Construction of Maerkle Disinfection Facilities Chlorine Gas
Scrubbers Replacement Project No. 5009-A.
LOCATION MAP
CITY OF OCEANSDE
HIGHWAY ,>»
NOT TO SCALE
PROJECT NAME
DISINFECTION FACILITIES
CHLORINE GAS SCRUBBERS REPLACEMENT PROJECT
PROJECT
NUMBER
5009A
EXHIBIT
1
DRAWN BY: SCOTT EVANS, CARLSBAD ENGINEERING DEPT. 6/02/08 Cr \CAPITAL\PLAJZEK\5009A.DWC
EXHIBIT 2
Maerkle Dam Reservoir Facility Prioritization List
Item
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Item
Replace controls and PLC for pump station
Replace VFDs and switchgear for pump station
Replace/reinstall discharge piping air valves
Repair leak in 10 MG tank
Replace joint sealant in 10 MG tank (west bay)
Replace flow meter
Replace chlorine dioxide generator
Install SCADA monitoring system to chlorine dioxide
generator
Replace ammonia/monochlorite analyzer
Install ammonia chillers
Remove existing scrubber and install dry type scrubber
Remove existing scrubber and install dry type scrubber
Remove chlorine evaporator and pressure chlorine gas
system
Remove chlorine evaporator and pressure chlorine gas
system
Replace joint sealant in 10 MG tank (east bay)
Install SCADA control of chloramine dosing system
Install security lighting on access road
Install security cameras (connected to SCADA) at gates,
pump station, tank, upper and lower disinfection facilities,
and reservoir.
Install automatic rolling gate
Underwater inspection of floating cover
Location
Pump Station
Pump Station
Pump Station
10 MG Tank
lOMGTank
Pump Station
Upper Disinfection Facility
Upper Disinfection Facility
Lower Disinfection Facility
Lower Disinfection Facility
Upper Disinfection Facility
Lower Disinfection Facility
Upper Disinfection Facility
Lower Disinfection Facility
lOMGTank
Lower Disinfection Facility
General Site
General Site
General Site
200 MG Reservoir
Implementation
Priority
1
1
2
1
2
2
1
1
1
1
1
1
2
2
2
2
2
2
1
1
Status
90% complete
Plans completed
Completed
Dive inspection under way
Schedule to be determined
Schedule to be determined
Received quotes
Under design
Received quotes
Completed
Authorization to Bid
requested
Authorization to Bid
requested
Completed
Completed
Schedule to be determined
90% complete
Schedule to be determined
Schedule to be determined
Under design
Dive inspection July 08
mxi
ro
3
1
RESOLUTION NO. 1327
2
A RESOLUTION OF THE BOARD OF DIRECTORS OF
3 CARLSBAD MUNICIPAL WATER DISTRICT (CMWD),
APPROVING PLANS AND SPECIFICATIONS AND
4 AUTHORIZING TO ADVERTISE FOR BIDS FOR THE
CONSTRUCTION OF MAERKLE DISINFECTION FACILITIES
5 CHLORINE GAS SCRUBBERS REPLACEMENT PROJECT NO.
5009-A.
6
WHEREAS, the Board has determined it necessary and in the public interest to construct
7
the chlorine gas scrubbers at Maerkle disinfection facilities; and
8
WHEREAS, the plans and specifications for furnishing of all labor, materials, tools,
9
equipment, transportation, and other expenses necessary and incidental to the construction of the
10
Maerkle Disinfection Facilities Chlorine Gas Scrubbers Replacement Project NO. 5009-A have
been prepared and are on file in the Engineering Department of the City of Carlsbad and are
incorporated by reference herein; and
I <J
WHEREAS, the project is a Class 2 categorical exemption (replacement or reconstruction14
of existing structures or facilities) and is, therefore, exempt from environmental review pursuant to
10
Section 15302 of the California Environmental Quality Act (CEQA); and16
WHEREAS, there are sufficient funds in the Water Replacement Fund to complete the
18 project.
1Q NOW, THEREFORE, BE IT RESOLVED by the Carlsbad Municipal Water District Board
of Directors of the City of Carlsbad, California, as follows:20
1. That the above recitations are true and correct.
21
2. That the plans, specifications, and contract documents for the construction of the
22
Maerkle Disinfection Facilities Chlorine Gas Scrubbers Replacement Project NO. 5009-A, on file
23
in the Public Works-Engineering Department of the City of Carlsbad are hereby approved.
3. The Secretary of the Carlsbad Municipal Water District is hereby authorized and
25 directed to publish, in accordance with State law, a Notice to Contractors Inviting Bids for the
26 construction of the Maerkle Disinfection Facilities Chlorine Gas Scrubbers Replacement Project
27 NO. 5009-A, in accordance with the plans, specifications, and contract documents referred to
28 herein.
5
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PASSED, APPROVED AND ADOPTED at a Special Meeting of the Board of
Directors of the Carlsbad Municipal Water District of the City of Carlsbad on the 24th
day of June, 2008, by the following vote to wit:
AYES: Board Members Lewis, Kulchin, Hall, Packard and Nygaard.
NOES: None.
ABSENT: None.
ATTEST:
i LiuL&u^L~>
L5ftRAlKjf M. WO^D) Secretary Q~
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