Agenda 12/10/2013 Item #16C2 12/10/2013 16.C.2.
EXECUTIVE SUMMARY
Recommendation to award Invitation to Bid number 13-6179, Project Number 70104 "NCRWTP
Sulfuric Acid Injection Improvements for Blowdown Water Disposal," to Mitchell & Stark
Construction Company,Inc.,in the amount of$673,000.
OBJECTIVE: Pretreat the odor control blowdown waste stream with sulfuric acid, and redirect
the waste stream from the sanitary sewer to a deep injection well.
CONSIDERATIONS: On June 24, 2008, as Agenda Item 10G, the Board of County
Commissioners (Board) adopted the 2008 Water Master Plan Update, which identified
requirements for odor control improvements. A new project number, 70104, was created in FY13
to consolidate all water plant compliance assurance projects, including the odor control
improvement projects.
The North County Regional Water Treatment Plant (NCRWTP) produces two waste streams: 1)
the high-salinity concentrate that results from the membrane treatment processes; and, 2) the
caustic blowdown that results from the odor control process. The concentrate is disposed of via
one of two deep injection wells. Presently, the blowdown waste stream is disposed of via the
sanitary sewer system; however, fouling of wastewater pumps, pipes, and valves has occurred
due to blowdown chemistry. The blowdown is an industrial waste that does not meet the
conditions of Collier County's Industrial Pretreatment Ordinance No. 2012-13. Disposing of the
blowdown via deep injection well will resolve that issue; however, to do so the blowdown pH
must be lowered to blend with the concentrate waste.
The scope of this project provides for the injection of sulfuric acid into the NCRWTP blowdown
industrial waste stream, which will lower the pH to a level compatible with the plant concentrate
so that both waste streams may be blended and disposed of via deep injection well without
fouling. This change in blowdown industrial waste stream disposal was fully reviewed by the
Florida Department of Environmental Protection, and they have confirmed that no permit or
permit modification is required. This change is the most cost-effective method of blowdown
disposal, although further modifications may be required to increase process reliability. There is
a similar project for the South County Regional Water Treatment Plant to accomplish the same
result; however, the processes, scope of work, and costs are different. For example, this more
expensive north plant project requires an additional sulfuric acid storage tank as recommended
by FDEP to prevent any possible cross connection with the potable water supply system.
The County advertised Invitation to Bid number 13-6179 on September 11, 2013, by sending
1,437 notices. Forty-nine prospective bidders downloaded full packages, and three bids were
received. On October 9, 2013, staff opened the three sealed bids,which are summarized below.
VENDOR BID
Mitchell & Stark Construction Co., Inc. $673,000.00
Douglas N Higgins, Inc. $684,636.00
Quality Enterprises USA, Inc. $988,800.00
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Staff and local project design engineer, CPH Engineers, Inc., determined that the lowest bid is
fair and reasonable, and recommend awarding the contract to Mitchell & Stark Construction
Company, Inc. The bid is approximately 51 percent above the design engineer's $445,900.00
opinion of probable cost. Attachment 3 is a letter dated October 14, 2013, from the design
professional, CPH Engineers, Inc., explaining the deviation between the estimate and the actual
bid amounts. The Purchasing Department concluded that bidding was competitive and
representative of market conditions. The bid tabulation, chart, engineer's letter of
recommendation, and contract are attached(Attachments 1, 2, 3 and 4, respectively).
The bid specifications informed the bidders there might be unforeseen conditions associated with
the project. The project cost incorporates an allowance of $40,000 that includes, but is not
limited to, undocumented underground infrastructure, as determined by staff, which may be
encountered during construction. The price for any additional work shall be negotiated prior to
commencement in accordance with the county's Purchasing Policy and the terms of the
agreement.
FISCAL IMPACT: Funding is available in, and is consistent with, the FY2014 Capital Budget
approved by the Board on September 19, 2013. The source of funding is Water User Fees (412).
The total capital cost to implement this project is $673,000. The project is expected to be
completed by June 2014. The operating budget impact of the completed project is reflected in the
table below. The operating cost increase of this project is greater than the south plant project due
to the current differences in the plant odor control processes. The operating budget funding
source will be user fees.
Elements FY 2014 FY 2015 - FY2033
Capital Outlay $673,000 $0
Operating Cost 0 $20,183 / r
Change * y
*This reflects the additional chemical cost in the annual operating budget for each fiscal year
over the life of the asset
LEGAL CONSIDERATIONS: This item is approved as to form and legality, and requires
majority vote for Board approval.—SRT
GROWTH MANAGEMENT IMPACT: This project meets current Growth Management Plan
standards to ensure the adequacy and availability of viable public facilities.
RECOMMENDATION: That the Board of County Commissioners, Ex-officio the Governing
Board of the Collier County Water-Sewer District, (a) award Invitation to Bid number 13-6179,
Project Number 70104 "NCRWTP Sulfuric Acid Injection Improvements for Blowdown Water
Disposal," to Mitchell & Stark Construction Company, Inc., in the amount of$673,000; and, (b)
authorize the Chairwoman to sign and execute the attached agreement after final review and
approval by the County Attorney's Office.
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12/10/2013 16.C.2.
Prepared By: Tom Sivert, PE, Senior Project Manager, Public Utilities Planning & Project
Management
Attachments:
Attachment 1 Bid Tabulation
Attachment 2 Chart
Attachment 3 Recommendation Letter
Attachment 4 Contract(Due to the size of the contract, a web link has be provided for viewing
at http://www.colliergov.net/ftp/AgendaDec1013/Agenda Item 16C3 Contract.pdf A hard copy
is also available at the County Manager's Office.)
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12/10/2013 16.C.2.
COLLIER COUNTY
Board of County Commissioners
Item Number: 16.16.C.16.C.2.
Item Summary: Recommendation to award Invitation to Bid number 13-6179, Project
Number 70104 "NCRWTP Sulfuric Acid Injection Improvements for Blowdown Water Disposal,"
to Mitchell &Stark Construction Company, Inc., in the amount of$673,000.
Meeting Date: 12/10/2013
Prepared By
Name: SivertTom
Title:VALUE MISSING
10/16/2013 10:35:50 AM
Submitted by
Title: VALUE MISSING
Name: SivertTom
10/16/2013 10:35:51 AM
Approved By
Name: Steve Messner
Title: Plant Manager,Water
Date: 10/17/2013 3:35:53 PM
Name: HapkeMargie
Title: Operations Analyst,Public Utilities
Date: 10/17/2013 4:09:07 PM
Name: ChmelikTom
Title:Director,Public Utilities Engineering
Date: 10/22/2013 10:34:16 AM
Name: SunyakMark
Title:Project Manager, Principal,Public Utilities Engine
Date: 10/23/2013 7:51:03 AM
AeiNkk
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12/10/2013 16.C.2.
Name: Howard Brogdan
Title: Supervisor-Laboratory,Water
Date: 10/25/2013 7:45:24 AM
Name: JohnsonScott
Title: Purchasing Agent,Purchasing&General Services
Date: 10/29/2013 7:13:16 PM
Name: MarkiewiczJoanne
Title: Manager-Purchasing Acquisition,Purchasing&Gene
Date: 10/30/2013 6:41:41 AM
Name: JacobsSusan
Title: Operations Analyst,Public Utilities
Date: 10/30/2013 9:50:32 AM
Name: Joseph Bellone
Title: Manager-Utility Billing&Cust Serv.,Utilities F
Date: 10/30/2013 4:41:20 PM
Name: WardKelsey
Title: Manager-Contracts Administration,Purchasing&Ge
Date: 10/30/2013 4:53:44 PM
Name: TeachScott
Title: Deputy County Attorney,County Attorney
Date: 11/14/2013 10:29:36 AM
Name: YilmazGeorge
Title: Administrator,Public Utilities
Date: 11/15/2013 10:09:10 AM
Name: TeachScott
Title: Deputy County Attorney,County Attorney
Date: 11/19/2013 1:25:12 PM
Name: KlatzkowJeff
Title: County Attorney
Date: 11/19/2013 2:08:39 PM
Name: UsherSusan
Title: Management/Budget Analyst, Senior,Office of Manage
Date: 12/2/2013 9:46:57 AM
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12/10/2013 16.C.2.
Name: OchsLeo
Title: County Manager
Date: 12/2/2013 10:42:39 AM
Asorak
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Architects Engineers 12/10/201316.C.2.
0 Environmental Landscape Architects Suite 240
V M/E/P PIanners Tampa,FL 33609
Surveyors Transportation/Traffic Phone:813.288.0233
Fax:813.288.0433
October 14,2013
Mr.Tom Sivert,P.E.
Senior Project Manager
Collier County
3339 Tamiami Trail E., Suite 303
Naples, FL 34112
Re: North County Regional Water Treatment Plant Sulfuric Acid Injection
Improvements for Blowdown Water Disposal
RFQ No. 13-6179
Engineer's Bid Review
Dear Mr. Sivert:
The County received bid packages from three (3) contractors for the North County Regional Water
Treatment Plant (NCRWTP) Sulfuric Acid Injection Improvements for Blowdown Water Disposal
Project. This project involves the installation of a new sulfuric acid injection system, which includes a
1,000-gallon double walled storage tank, chemical pump skid, and secondary containment piping. The
blowdown water force main will be rerouted to the NF concentrate pump station for blending and disposal
in the deep injection well system. This will involve the addition of new 3-inch blowdown piping and the
rehabilitation of the NF concentrate pump station. The rehab will include a new coating system and
fiberglass weir. To provide a backup to the deep injection well disposal system, two self-priming pumps,
one duty and one standby will be connected to the new flow control structure to send blowdown water to
the sanitary sewer system in an emergency scenario. The bid tab provided by the County is detailed
below.
Lowest
Bid Bidder's Name Total Bid
Mitchell & Stark Construction � I
1 Company Inc. ' A l ; 1`
2 Douglas N. Higgins, Inc. $684,636.00
3 Quality Enterprises USA, Inc. $988,800.00
Based on our review of the available data (bid pricing) and the fact that Mitchell & Stark is one of the
County's pre-qualified contractors, we have no objection to the County proceeding with the award of the
bid to Mitchell & Stark Construction Company, Inc. in the amount of$673,000.00, which includes the
County's $40,000.00 allowance. All of the bidders' costs for construction were higher than CPH's
Opinion of Probable Construction Cost (OPC). We reviewed the bid prices of the two lowest bidders
since they were within 2% of each other and the third bidder was significantly higher and was therefore
dropped. The major differences in pricing were five line items; Sulfuric Acid Injection System, Nano
Filtration Pump Station Rehabilitation, RO Concentrate Bypass Connection, Local Control Panel No. 4,
and Miscellaneous Conduits, Wiring, Circuit Breakers, Trenching, & Appurtenances. All other lines
items were similar to the engineer's OPC. Below are descriptions for the price differences for the five
items previously mentioned.
The engineer's OPC for the Sulfuric Acid Injection System was off by approximately 14%, based on the
average price of the two lowest bidders. Our OPC was based on pricing supplied by vendors. The price
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12/10/2013 16.C.2.
differential is thought to be from the concrete slab and coating system. Over the last 3-5 months we have
seen concrete prices increase due to increasing construction throughout the state.
The OPC for the NF Concentrate Pump Station Rehabilitation was off by approximately 60%, based on
the average price of the two lowest bidders. Pricing for the OPC was developed from a recent similar
project done for the County at the NCRWTP. This similar work produced a per square foot cost of
approximately $26. The average square foot cost for the two lowest bidders is $90. The difference is
thought to come from the surface preparation and confined space requirements. The concrete surface in
the NF concentrate pump station is dilapidated due to the constant exposure to hydrogen sulfide gasses;
therefore it will require additional surface preparation and touchup to properly apply the new coating
system which the contractors have conservatively accounted for in their pricing minimizing their
exposure. Because the pump station wet well has limited means for entry and exit, it is considered a
confined space and will require additional ventilation and safety requirements to meet all OSHA
regulations.
The RO Concentrate Bypass OPC was off by approximately 45%,based on the average pricing of the two
lowest bidders. Our OPC was based off a recent project under construction that contained similar
equipment and materials. Additionally, we received pricing from a local supplier for the piping, tapping
sleeve, and control valve.Therefore the numbers generated for the OPC should be relatively similar to the
contractor's prices. However, contractors will shift money in their bids to account for unknown labor
hours. Since there was a significant difference for this line item between the two lowest bidders, it is
believed that the contractors used this line item to account for additional labor hours.
The pricing for Local Control Panel (LCP) No. 4 came in approximately 55% higher than the engineers
OPC. The large difference is thought to be from the price for stainless steel. The pricing developed for the
engineer's OPC for this line item was based off of a recent project that had numerous stainless steel Anek
electrical panels. Because this project had numerous panels, the contractor will typically receive lower
pricing from vendors. This was not accounted for when developing the OPC for this project. Additionally,
pricing for stainless steel has steadily increased over the past 6-9 months, making it difficult to predict
accurate construction cost for these items.
Just prior to releasing the project for bidding, a biofilter for the NF concentrate pump station and an LCP
was removed from the project. While developing the updated OPC to account for these design changes,
the conduit and wiring for LCP 4 was inadvertently left out. Accounting for this wiring and conduit, the
OPC would have been approximately$60,000, similar to the pricing seen from the two lowest bidders.
Please note that we have not reviewed any references for the lowest bid; however this should not be
required since Mitchell & Stark is a pre-qualified contractor for the County. If such a review is required,
please provide contact information for each bidder so that we may ask for references and similar projects.
Please contact us if additional information is needed concerning the above.
Sincerely,
CPH ENGINEERS,INC.
W. Wade Wood,P.E.
Vice President
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