City of Fairfax, Virginia City Council Regular Meeting. Honorable Mayor and Members of Cfy ;ouncil Robert L. Sisson, City Manager /I.

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1 City of Fairfax, Virginia City Council Regular Meeting Agenda Item #..,.,C:::o~Or!---!h~--- city Council Meeting q j/.-...:cx:l..-.>o?...~-/_,_j-=2=; r 1 TO: FROM: SUBJECT: ISSUE(S): SUMMARY: Honorable Mayor and Members of Cfy ;ouncil Robert L. Sisson, City Manager /I.)J d Approval of Program Budget for CH2M HILL, Design-Builder for the Goose Creek Water Treatment Plant Improvements Resolution by City Council approving a Phase II Program Budget with CH2M HILL (Design Builder) for final engineering and procurement of construction services necessary for the Goose Creek Water Treatment Plant Improvements (Plant Improvements). After public procurement competition among ten Offerors, CH2M HILL was awarded the Design-Build Program for the Goose Creek Water Treatment Plant Improvements on April 18, 2011 consisting of engineering and construction services. This Phase I agreement involved Basic and Special Services including the financial studies and engineering services. As a result the Phase I Engineering Report is now approved by the Virginia Health Department and a variety of out-of-schedule projects for immediate delivery have been completed as well. Final engineering, construction procurement services, and related activities remain to be completed. The recommended Phase II Program for the Plant Upgrade and Improvements is to proceed with 1 00 percent Plans and Specifications producing an estimated 15 procurement packages based on individual projects, equipment, or trades. The major objective of the Phase II Program will be to offer a final Guaranteed Price and commence construction in May The GMP for the Project remains at $16.8 Million and includes all Phase I and II services by CH2M HILL. The Phase II budget is not a lump sum and will not exceed $1,200,000. FISCAL IMPACT: RECOMMENDATION: ALTERNATIVE COURSE OF ACTION: RESPONSIBLE STAFF/ POC: COORDINATION: ATTACHMENTS: This work has been contemplated by a series of bond proceeds and remains within the prior cost estimate for the Plant Improvements. Authorize the City Manager, or his designee, to execute the Agreement on behalf ofthe City. Do not approve the Phase II Program GMP Budget. Richard C. Thoesen, P.E.; Director of Utilities City Manager's Office; Finance Scope of Work For Phase II Design-Build Services

2 CITY OF FAIRFAX, VIRGINIA GOOSE CREEK WATER TREATMENT PLANT Scope ofwork For Phase II Design-Build Services Development of Contract Documents and Procurement for Guaranteed Maximum Price by Richard C. Thoesen, P.E. A. Project Overview This scope of work outlines the work necessary to complete the design-build project by CH2M HILL taking the current 30% design documents to the 100% completion level based on the improvements recommended in the following documents: 1) the Design-builder's proposal dated January 24, 2011; 2) the Preliminary Engineering Report dated July 15, 2011; and 3) subsequent modifications by VDH and City Staff after the submittal of the Preliminary Engineering Report At the completion of Phase II, CH2M HILL will provide the final Guaranteed Maximum Price (GMP) for approval by the City Council. In addition to the design engineering contained in the Phase II Program, CH2M HILL will also be providing procurement services, treatment process support, Fast-track design of several smaller projects, and if requested, financial/ economic analyses. Basic Services - Project Tasks Task 1: Task 2: Task 3: Task4: Tasks: Task 6: Detailed engineering services to 100-percent design documents which will be used to offer the final GMP Constructability and Procurement Services Treatment Process Engineering to support the Water Plant and ensure water quality Fast-track project engineering to address the Plant's immediate needs Financial and engineering economic analyses Independent Value Analysis to lower construction costs Page 1 of 6

3 Detailed Design Services Detailed design services will consists of further developing the engineering presented in the Phase I design report (which constituted 30 percent completion and was submitted to VDH on July 15, 2011) to 100 percent. Project design engineering will produce 6o percent completion documents for quality assurance followed by 100 percent design documents ready for approval by VDH. The work will be further developed into separate bid documents that, together, will form the basis of the GMP. This will ensure logical and aggressive completion of the Phase II Program to include the following major facilities: Replace existing raw water pumps with three new 6-mgd vertical turbine solids handling pumps with variable speed drives. A prefabricated modular type building for the existing raw water pump station electrical equipment and controls that will be located near the existing raw water pump station building. Building floor space will be designed to accommodate electrical equipment and controls for a new raw water pump station if required in the future. A 350 KW diesel generator, with an integral fuel tank, for raw water pumping. Design of baffle walls for both clear-wells to maximize chlorine contact times as noted by the Health department. A new prefabricated chemical feed building to store sodium hypochlorite, sodium hydroxide, ferrous sulfate, aqua ammonia, and hydrofluosilicic acid, and related maintenance facility with access road. A new chemical feed systems for the chemicals. A new residuals solids handling pumps and related conveyance piping to pump residuals from the sedimentation basins to Cell No.2. An improved administrative and training space in existing main building including break room. A Programmed Logic Controller based SCADA (instrumentation) system. Replacement of all four flocculators and drives. Replacement of the horizontal mechanical mixer in the raw water supply. Replacement of filter gates; Waste gates on filter 1 through 4 Influent gates on filters 1 through 4 Butterfly valves on the filter waste for filters 5 and 6 Weir or influent valves to filters 5 and 6 Perform concrete surface repair to the flocculation/ sedimentation Design modifications to yard piping, consisting of piping modifications associated with sludge collection, pumping and piping to Cell No.2 of the sludge lagoons. Address safety issues such as; Replacement of ladders in sedimentation tanks Replacement of chains at openings to sedimentation tanks with hand rail gates Installation of handrails around the perimeter of each filter Page 2 of 6

4 Demolition of gaseous chlorine system. Demolition of existing chemical feed system. Provide improved building space for the existing activated carbon storage area to meet fire code. Below is a summary of scope items that were added after the Phase I Engineering Report and are now included in the scope and remain within the budgeted $16.8 million construction program. Design of a parallel raw water pipeline from the raw water pump station to interconnect to the process piping upstream of the inline mechanical mixer and related geotechnical investigation and surveying of alignment. Design of a new generator for the finished water pump station. The generator will be sized to supply power to one finished water pump, the boiler system, power to the administration building, SCAD A equipment, and other miscellaneous electrical items required to keep the plant producing a flow of approximately 6 million gallons per day to the distribution system. Replacement of grating and handrails in the pump wet well of the finished water pump station No.1. Replacement of four hatch covers and ladders to clearwell No.1. Painting of the air jwater interface in each sedimentation tank. Replace high service pumps and motors for units 5 and 6 and provide related instrumentation. Providing ventilation to the head space above all filters. Provide consultation to Director for plant process control. Investigation and, if required, remediation of possible hazardous waste, asbestos, lead paint or other types of contamination will be undertaken by the City. Procurement Support (Immediate and GMP Projects) After the design of an estimated 15 bid "packages" (subcontracts & equipment), the procurement team will assemble and issue solicitations for both major equipment suppliers and subcontractors for the work on the site. It is anticipated that the equipment bid packages will be issued in advance of the subcontractors' work. Financial and Engineering Economics Limited near-term continuation of financial/alternative analyses support, such as Spending Plans, as requested by the City. Value Analysis CH2M HILL will provide an independent team to perform a Value Analysis (VA) study of the Phase I design early in the Phase II Program. VA team members will not be associated with the design to drive creativity and credibility. Page 3 of 6

5 EXHIBIT A PRELIMINARY DRAWING LIST G-1 Cover G-2 Index to Drawings G-3 Abbreviations D-1 Site Plan RWPS Site Demolition D-2 RWPS Section & Details Demolition D-3 RWPS Section & Details Demolition D-4 Existing Chlorine Room Demolition D-5 Filter Administration Building Basement Demolition D-6 Filter Administration Building Upper Floor Demolition D-7 Flocculation basins plan Demolition D-8 Flocculation basins section Demolition C-1 Civil Legend C-2 Overall Site Plan C-3 Enlarged Plant Site Plan C-4 Enlarged R WPS Site Plan C-5 Enlarged Filter Building Entrance Site Plan C-6 Civil Sections C-7 Civil Details C-8 Civil Details C-9 Erosion/Sediment Control Drawings C-10 Erosion/Sediment Control Drawings A -1 Architectural legend A-2 Life Safety Plan (Chemical Building) A-3 Building Elevations (North and South) A-4 Building Elevations (East and West) A-5 Enlarged Floor Plan (East) A-6 Enlarged Floor Plan (West) A-7 Improved Office Area Modifications A-8 Elevation cabinetry/toilet accessories A-9 Reflected ceiling plan A-1 0 Misc. details A-ll Modification of Main Entrance to Filter Building A-12 Main Entrance Filter Building Sections and Details A-13 Life Safety Plan (Administration Area) A -14 Carbon Room Modifications A-15 Door Hardware Schedule A-16 Interior finish schedule A-17 Architectural Sections and Details A-18 Architectural Sections and Details A-19 Architectural Sections and Details A-20 Architectural Sections and Details S-1 Structural Legend S-2 Statement of Special inspections 1 S-3 Statement of Special inspections 2 S-4 Statement of Special inspections 3 S-5 RWPS Structural Foundation and Generator Plan Page 4 of 6

6 Preliminary Drawing List (Con't.) S-6 R WPS Sections and Details S-7 R WPS Sections and Details S-8 Chemical Building Foundation Plan S-9 Chemical Building Structural Plan S-1 0 Chemical Building Sections and Details S-11 Chemical Building Sections and Details SM-1 Finished Water Vault Plans, Sections, and Details SM-2 Sludge Pumping Station Plan, Section and Details SM-3 Miscellaneous Structural and Mechanical Details SM-4 Miscellaneous Structural and Mechanical Details SM-5 Miscellaneous Structural and Mechanical Details SM-6 2 MG Clearwell Baffling Plan SM-7 I MG Clearwell Baffling Plan SM-8 FWPS Generator Pad Sections and Details M-1 Mechanical Legend M-2 Mechanical Legend M-3 RWPS Plan Layout M-4 RWPS Sections and Details M-5 Chemical Building Plan M-6 Chemical Building Enlarge Plan (North) M-7 Chemical Building Enlarge Plan (South) M-8 Chemical Building Sections M-9 Chemical Building Sections M-1 0 Chemical Building Details M-Il Chemical Building Details M-12 Chemical Building Details YP-1 Raw Water Pipeline Plan and Profile (1"=50') YP-2 Raw Water Pipeline Plan and Profile (1"=50') YP-3 Raw Water Pipeline Plan and Profile (1"=50') YP-4 Raw Water Pipeline Details YP-4 Raw Water Pump Station Yard Piping Plan, Sections and Details YP-5 WTP- Partial Yard Piping Plant Layout- North YP-6 WTP - Partial Yard Piping Plant Layout- South YP-7 Modifications to Existing Raw Water Piping- Plans and Sections YP-8 Yard Piping Standard Details YP-9 Yard Piping Standard Details H-1 HV AC Legend H-2 Administration Building Space Modifications H-3 Roof Plan Renovated Office Space H-4 HV AC Sections and Details H-5 Schedules Airflow and Control Schematics Chemical Bldg. H-6 Schedules Airflow and Control Schematics Renovated Office Area H-7 Filters 1-4 Floor Plan H-8 Filters 5 and 6 Floor Plan H-9 Filter HV AC Modifications Sections H-9 Equipment Schedule Page 5 of 6

7 Preliminary Drawing List (Con't) P-1 Plumbing Legend P-2 Chemical Building Plumbing Plan P-3 Administration Building Space Modifications P-4 Renovated Office Sanitary and Storm P-5 Potable/Non Potable Domestic Water Riser P-6 Equipment Schedule P-7 Plumbing Details FP-1 Fire Protection Floor Plan FP-2 Fire Protection Details E-1 Electrical Legend E-2 Electrical Legend E-3 lntake/rwps- Electrical Site and Facility Plan E-4 Intake/R WPS - One Line Diagram E-5 WTP- Overall Site Electrical Plan E-6 WTP - One Line Diagram (I) E-7 MCC One Line Diagram (I) E-8 Control Diagrams and Panelboard Schedules E-9 Control Diagrams and Panelboard Schedules E-1 0 Chemical Building- Process and Facility Plan E-ll High Service Pumping Station Generator E-12 Sludge Pumping Station- Process and Facility Plans E-13 Schedule - Panel and Power Circuits E-14 Schedule - Panel and Power Circuits E-15 Schedule - Cable and Conduit E-16 Schedule - Luminaire E-1 7 Electrical Details 1-1 I&C Legends 1-2 I&C Legends 1-3 P&ID- RWPS 1-4 P&ID- Treated Water Chemical I -Ammonia l-5 P&ID- Treated Water Chemical 2- Ferric Chloride 1-6 P&ID- Treated Water Chemical3- Hydrofluosilicic Acid 1-7 P&ID- Treated Water Chemical4- Sodium Hypochlorite 1-8 P&ID- Treated Water ChemicalS- Sodium Hydroxide 1-9 P&ID- High Service Pumping Station 1-10 P&ID- Sludge Pumping Station I-ll P&ID- Generator 1-12 Control System Block Diagram I 1-13 Control System Block Diagram 2 I -14 Instrumentation and Controls Details I -15 Instrumentation and Controls Details \\cityhall\utilities\city COUNCIL \Staff_ Report_ Design_ Build_ CH2 _budget _Attachment. doc Page 6 of 6

8 SAMPLE MOTION "I MOVE THAT THE CITY COUNCIL AUTHORIZE THE CITY MANAGER OR HIS DESIGNEE TO EXECUTE THE PHASE II AGREEMENT WITH CH2M HILL FOR DESIGN-BUILD PROGRAM SERVICES FOR A BUDGET NOT-TO-EXCEED $1,200,000" PROVIDED THAT THE CONTRACT AND ANY AMENDMENTS ARE ACCEPTABLE TO THE CITY MANAGER AND APPROVED AS TO FORM BY THE CITY ATTORNEY". 1