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Home My WebLink AboutRESOLUTION NO. 2016-38 RESOLUTION NO. 2016-38 RESOLUTION TO APPROVE CHANGE ORDER NO. 1 FROM RICKLEFS EXCAVATING, LTD. FOR THE UV DISINFECTION SYSTEM PROJECT IN THE CITY OF FAIRFAX,LINN COUNTY, IOWA WHEREAS, the City Council of Fairfax, Iowa has contracted with Ricklefs Excavating, Ltd. for the UV Disinfection System Project within the corporate limits; and WHEREAS,Hall and Hall Engineers, Inc., has recommended approval of Change Order#1 as described below: ORIGINAL CONTRACT AMOUNT: $ 243,500.00 ORIGINAL CONTRACT COMPLETION DATE: July 22, 2016 ITEM #1: Clarification to Enaqua UV Disinfection System Requirements This change is to ensure conformance with the Iowa DNR Construction Permit issued on 5/4/2016 (number 2016-0372S). This permit requires a clarification to the acceptable UV Disinfection System. The UV Disinfection System Supplier is to provide the City of Fairfax with a System capable of Disinfection Dosage of 30 mJ/cm2 based on the fastest system velocity, NOT assuming uniform velocity. This is an Iowa DNR—mandated calculation clarification, not a difference in requirements from the bid documents. No change has been made to the disinfection requirements form the bid documents, resulting in a zero-dollar change to the contract documents. Please see the attached documents, as approved by the IDNR. The total adjusted Change Order 1 amount is($0.00). Original Contract Amount: $243,500.00 C.O. #1 Item 1 ($0.00) Revised Contract Amount: $243,500.00 NOW, THEREFORE, BE IT RESOLVED, by the City Council of the City of Fairfax, Iowa, to approve Change Order No. 1 from Ricklefs Excavating, Ltd. for the UV Disinfection System Project for no additional costs keeping the contract amount $243,500.00. BE IT FURTHER RESOLVED, by the Fairfax City Council of the City of Fairfax, Iowa, that the Mayor and City Clerk/Treasurer are hereby authorized and directed to execute said resolution. Passed and approved this 10th day of May 2016. AYES: Beer, Daly, Kell, Volk, and Wainwright NAYS: None Burnell G. Frieden, Mayor e k F °•.° . ATTEST: Z 6d' [Y. a e P,`I a� Ain thia K. Stimson, City Clerk/Treasurer ," ► °•,°•.H .;�•�. CHANGE ORDER NO. 1 PROJECT: UV Disinfection System DATE: May 5, 2016 CONTRACTOR: Ricklefs Excavating, Ltd. Anamosa, Iowa ORIGINAL CONTRACT AMOUNT: $ 243,500.00 ORIGINAL CONTRACT COMPLETION DATE: July 22, 2016 ITEM #1: Clarification to Enaqua UV Disinfection System Requirements This change is to ensure conformance with the Iowa DNR Construction Permit issued on 5/4/2016 (number 2016-0372S). This permit requires a clarification to the acceptable UV Disinfection System. The UV Disinfection System Supplier is to provide the City of Fairfax with a System capable of Disinfection Dosage of 30 mJ/cm2 based on the fastest system velocity, NOT assuming uniform velocity. This is an Iowa DNR—mandated calculation clarification, not a difference in requirements from the bid documents. No change has been made to the disinfection requirements form the bid documents, resulting in a zero-dollar change to the contract documents. Please see the attached documents, as approved by the IDNR. The total adjusted Change Order 1 amount is ($0.00). Original Contract Amount: $243,500.00 C.O. #1, Item 1 ($0.00) Revised Contract Amount: $243,500.00 Ricklefs Ex Ltd , Hall & Hall Engineers, In By: i By: _� Title: Title: Date: e��1�`� Date: � 5_ City of Fairfax, Iowa i Title: Date: 5 _ SECTION 01000 SPECIAL PROVISIONS GENERAL INFORMATION Utilities The Contractor is reminded that coordination with utility companies is the responsibility of the Contractor as stated in the Cedar Rapids Metro Construction Specifications. The Contractor is responsible for obtaining utility locations and potholing utility lines as needed. The following utility companies are in the area and have corresponded with the ENGINEER regarding the project. Additional Information necessary to properly define bid items is as follows: Line Item 3: IN CHANNEL, NON-CONTACT UV DISINFECTION SYSTEM The Contractor shall field verify the dimensions of the existing UV chamber prior to ordering any UV Reactor or associate equipment. UV System—Enaqua ENDL06042 (or Engineer Approved Equal). The following specifications and design criteria were provided courtesy of Enaqua. Substitutions to this equipment are allowed, and must be approved by the City of Fairfax Waste Water Department and City Engineer. Contractor shall include engineering specifications for this equipment(whether or not a substitute is proposed)as a part of the bid documents. Design Criteria Average Dry Weather(ADW) .40/278.0 MGD/GPM Average Wet Weather(AWW) .60/417.0 MGD/GPM Maximum Wet Weather(MWW) 1.8/1,250.0 MGD/GPM Peak Hourly Wet Weather 2.5/1,736.0 MGD/GPM (PHWW) Open Channel/Inline/Closed Open Channel UV Transmittance 65 % UVT (Minimum) Total Suspended Solids <20.0 mg/I (30 day average) Total BOD <20.0 mg/I (30 day average) Target Pathogen E.coli Influent Maximum 100,000- /100 ml (CFU/MPN) 200,000 Permit Criteria [monthly average 126 /100 ml (CFU/MPN) (7-day geometric mean)] Disinfection Dose (Calculated)* 30.0 (mW.s/cm2;mJ/cm2) minimum Plant Process Aerated Lagoons: Headworks >Aerated Lagoons > secondary clarifiers Particle Size <30 Microns Total Iron <.3 mg/I NTU <5 NTU Equipment Redundancy Two banks in series capable of treating 50% of PHWW with the largest bank out of service *The disinfection dosage shall be based on the fastest system velocity, NOT assumed uniform velocity. 01000-1 BIDDING NOTES: CONTRACTOR SHALL SUBMIT SHOP DRAWINGS INCLUDING ENGINEERING SPECIFICATIONS FOR EACH PROPOSED PIECE OF EQUIPMENT AS A PART OF THE BID PACKAGE. BID ITEM DESCRIPTION QTY UNIT BID ITEM NOTES NO. 1 Mobilization 1 LS This Item includes any necessary mobilization for temporary erosion and sediment controls as well as the overall site mobilization. 2 Temporary Erosion and Sediment Control 1 LS This item shall be used for silt retention along the edges of areas disturbed during building installation and trenching of electrical conduit and lines. No SWPPP is required for this project. All site activities fall under the existing Waste Water Treatment Plant NPDES permit. 3 In-Channel,Non-Contact UV Disinfection System 1 LS This item shall include all equipment,installation,components,spare parts,start-up services and warranties necessary to produce a working UV Disinfection System for the City of Fairfax.A full list of system requirements can be found on the System Notes and General Details section of this plan set (Sheet 3). The Contractor shall include a full set of specifications and shop drawings for the proposed UV System as a part of the required bid documents package at the time of bid letting so that City personnel and the Iowa Department of Natural Resources can confirm the proposed system meets all permit requirements prior to the awarding of bids for this project. All electrical components and wiring necessary to connect the UV System from the UV Building Subpanel to the UV System are considered incidental to this item.Enaqua Reactor Model ENDL06042 or Engineer Approved Equal. 4 Electrical Connection from Blower Building to Proposed UV 1 LS This item is for all electrical equipment,wiring material,wiring connections,trenching,and conduit necessary to provide the proposed UV Building,UV Disinfection System,and Sensors within the UV Building with power. Power requirements by component can be found on the System Notes and 0 Disinfection Building General Details section of this plan set(Sheet 3). 5 UV Building 1 LS This item includes all site preparation,excavation,materials,and labor required to build a 30'x 20'UV Building as detailed within this plan set. All electrical,lighting,and heating components are included under this line item. r 6 Gravel Resurfacing(Iowa DOT Gradation No.11) 250 TN This Item includes all material,hauling,installation final grading and subgrade preparation necessary to restore all areas disturbed by trenching and building construction activities. m 7 Hach Sigma 950 Sampler 1 LS This item includes all equipment necessary to provide the City of Fairfax with a Hach AS950 controller(product#ASA.CSXX1 X112X),including Bottle Kit,Intake Tubing,and Strainer or Engineer Approved Equal. All equals must be capable of integration with the City of Fairfax's existing samplers and d associated software,as specified by the City of Fairfax Waste Water Department.. o a 8 YSI DO and UVT Monitor with Display 1 LS This item includes all components and installation of the YSI DO and UVT Monitor with Display as specified under the System Notes and General Details section of this plan set(Sheet 3),or Engineer Approved Equal. Any approved equal must be capable of integration into the City of Fairfax's current monitoring systems,as specified by the City of Fairfax Waste Water Department. n N 9 Siemens Hydro Ranger 200 with Transducer and 50'Cable 1 LS This item includes all components for a Siemens Hydro Ranger 200 with(1)Siemens XPS-10 Ultrasonic Transducer,03-10 Meter Range,50'Cable,FM Class 1 Division 2 Location Rated,or Engineer Approved Equal. Any approved equal must be capable of integration into the City of Fairfax's N current systems,as specified by the City of Fairfax Waste Water Department. ko O N GENERAL NOTES: UV SYSTEM NOTES: a 0 a 1. THE PROPOSED IMPROVEMENTS INCLUDED IN THESE DRAWINGS HAVE BEEN DESIGNED IN ACCORDANCE WITH THE CEDAR RAPIDS METROPOLITAN AREA THE UV DISINFECTION SYSTEM SHALL,AT A MINIMUM,MEET THE FOLLOWING CRITERIA: DESIGN STANDARDS MANUAL.CONSTRUCTION SHALL CONFORM TO CEDAR RAPIDS METROPOLITAN AREA STANDARD SPECIFICATIONS AND DETAILS FOR PUBLIC IMPROVEMENTS,CURRENT VERSION,AS STATED IN THE CONTRACT DOCUMENTS. A disinfection dosage of 30 mJ/cm z shall be required This disinfection dosage shall be based on the fastest system velocity,NOT assumed uniform velocity. v u 2. WHERE PUBLIC UTILITY FIXTURES ARE SHOWN AS EXISTING ON THE PLANS OR ENCOUNTERED WITHIN THE CONSTRUCTION AREA,IT SHALL BE THE The Contractorshall field verify the dimensions of the existing UV chamber pdorto ordering any UV Reactor or associate equipment. _o RESPONSIBILITY OF THE CONTRACTOR TO NOTIFY THE OWNERS OF THOSE UTILITIES PRIOR TO BEGINNING ANY CONSTRUCTION.THE CONTRACTOR UV System-Enrique ENDI.06042(or Engineer Approved Equal).The following specifications and design criteria were provided courtesy of Enaqua. SHALL AFFORD ACCESS TO THESE FACILITIES FOR NECESSARY MODIFICATION OF SERVICES.UNDERGROUND FACILITIES, STRUCTURES AND UTILITIES Substitutions to this equipment are allowed,and must be approved by the City of Fairfax Waste Water Department and City Engineer. Contractor shall include engineering d HAVE BEEN PLOTTED FROM AVAILABLE SURVEYS AND RECORDS,AND THEREFORE THEIR LOCATION MUST BE CONSIDERED APPROXIMATE ONLY.IT IS specifications for this equipment(whether or not a substitute is proposed)as a part of the bid documents. 0 POSSIBLE THERE MAY BE OTHERS,THE EXISTENCE OF WHICH IS PRESENTLY NOT KNOWN OR SHOWN.IT IS THE CONTRACTOR'S RESPONSIBILITY TO DETERMINE THEIR EXISTENCE AND EXACT LOCATION AND TO AVOID DAMAGE THERETO.NO CLAIMS FOR ADDITIONAL COMPENSATION SHALL BE ; ALLOWED TO THE CONTRACTOR FOR ANY INTERFERENCE OR DELAY CAUSED BY SUCH WORK. esion Criteria scone of Supply Average DryWeather(ADW) .40/278.0 MGD/GPM Reactor Type In channel Bank 1-Hydrualic Peak Flow U 3. THE CONTRACTOR SHALL CONTAIN THEIR WORK WITHIN THE CITY STREETS RIGHTS-OF WAY,UNLESS OTHERWISE NOTED IN THESE PLANS. THE Tag Description Rate Disinfection Peak Flow Rate yl CONTRACTOR SHALL ENCROACH ONTO PRIVATE PROPERTIES TO REMOVE AND REPLACE DRIVEWAYS AND WATER SERVICES. IF ADDITIONAL WORK Average Wet Weather r(M W)(MWW) t8/t26060/417.0 MGD/GPM 0 MGD/GPM Reactor Configuration Notes Outdovrcovered installation GPM N Maximum Wet Weather(M AREA IS REQUIRED BY THE CONTRACTOR TO COMPLETE THEIR CONSTRUCTION OPERATIONS,ADDITIONAL PERMISSION AND EXPENSE FOR EXTRA WORK . , . uration STD 1 Influent to uv Reactor 1,736.0/866.1 0 Peak Hourly Wet Weather Low Pressure High Intensity 2 Disinfectant Effluent from UV 1,736.0/866.1 OL AREA SHALL BE AT THE CONTRACTOR'S EXPENSE. PHWW 2.5/1,736.0 MGD/GPM UV Lamps Non Amalgam Reactor d 4. CONTRACTOR SHALL COORDINATE ADJUSTMENT OF UTILITIES TO GRADE TO BE DONE BY OTHERS. Open Channel/inline/Closed Open Channel Material of Construction 304 Stainless Steel O I Head loss(inches)from Flange to Flange ,� UV Transmittance 65 %UVT(Minimum) UV Reactor 5. CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTAINING ACCESS TO THE WASTE WATER TREATMENT FACILITY AND ALL BUILDINGS THEREON Total Suspended Solids <20.0 mg/I(30 day average) NAverage Wet Weather(AWW) <1.0 inches I Number of Proposed UV Reactor(s) t p AT ALL TIMES DURING CONSTRUCTION OF THIS PROJECT. Total BOD <20.0 mg/I(30 day average) Maximum Wet Weather(MWW) <6.0 inches N Number of Banks per Reactor Two(2) Peak Hourly Wet Weather <10.0 0) 6. THE CONTRACTOR SHALL STRIP,STOCKPILE AND RESPREAD THE EXISTING TOPSOIL(TOP 6-)ON SITE FOR ALL DISTURBED AREAS. THE SEEDBED Target Pathogen E.coli UV Intensity Sensors PHWW inches / PREPARATION OPERATIONS SHALL CONFORM TO SECTION 02900-3.04 OF THE CR METRO SPECS. Influent Maximum 100,000- /100 ml(CFU/MPN) Number of UV Intensity Monitors 2(One per bank) a / Perm200,000 it Criteria(monthly average Controls&Electrical Power Usage(kW) 7. THE TOP SIX 6 INCHES OF THE DISTURBED AREAS SHALL BE FREE OF ROCK AND DEBRIS AND SHALL BE SUITABLE FOR THE ESTABLISHMENT OF 126 /100 ml(CFUJMPN) Average Wet Weather(AWW) 6.04 kW ( ) (7-day geometric mean)] AURX 1 VEGETATION,SUBJECT TO THE APPROVAL OF THE ENGINEER. Maximum Wet Weather(MWW) 12.08 kW / Disinfection Dose(Calculated) 30.0 (mW.s/cm1;mJ/cmz)minimum EDC(Ensure Dosing Controller)and SCADA integration 1 Peak Hourly Wet Weather 12.08 kW Yui 8. KEEP PUBLIC STREETS FREE FROM SOIL AND DEBRIS GENERATED BY PROJECT CONSTRUCTION. THE CONTRACTOR SHALL CLEAN SOIL AND DEBRIS Plant Process Aerated Lagoons:Headworks>Aerated PHWW Lagoons>secondary clarifiers Power Distribution/Disconnect 2(One per bank) FROM THE STREETS ON A DAILY BASIS. Partite Size <30 Microns Panels n HMI Panels 1(common) � 9. THE CONTRACTOR IS EXPECTED TO HAVE MATERIALS,EQUIPMENT,AND LABOR AVAILABLE ON A DAILY BASIS TO INSTALL AND MAINTAIN EROSION Total Iron <.3 mg/l Miscellaneous Equipment CONTROL FEATURES ON THE PROJECT. EROSION CONTROL METHODS OTHER THAN THOSE SHOWN ON THE PLANS MAY BE NECESSARY,WHICH MAY INVOLVE SEEDING,ROCK DITCH CHECKS,SILT BASINS,OR SILT DIKES. ETU <5 NTU Ultrasonic Level Sensor 1 u Equipment Redundancy Two banks in series capable of treating 50% � 10. THE MEANS OF THE WORK AND THE SAFETY OF THE CONTRACTOR'S EMPLOYEES ARE SOLELY THE RESPONSIBILITY OF THE CONTRACTOR. of PHW W with the largest be out of service In G 11. ONCE CONSTRUCTION IS COMPLETED,SEED ALL DISTURBED AREAS WITH TURF GRASS-TYPE 1A,LAWN MIXTURE,SUNNY CONDITIONS PER CEDAR RAPIDS SPECIFICATION 02900.203.A. Equipment Package a Equipment Package must include the following: �I 12. EACH BID ITEM SHALL BE MEASURED AND PAID CONFORMING TO CEDAR RAPIDS METROPOLITAN AREAS STANDARDS AND SPECIFICATIONS UNLESS N NOTED OTHERWISE IN THE BID ITEM REFERENCE NOTES,THIS SHEET. One(1)Each of: I • UV Reactor 0 • Power Panels '0 �� to • HMI Panel ' / • Estimated Start-up and Commissioning' N • Optional Equipment l • UV Sensor r • Operator's Safety Kit o • Cleaning Kit ONE CALL .9 01 Eight(8)Each of: CALL BEFORE Y(..)[-)DIG! • j • • Ballast UV Lamps 1-800-292-8989 rn wWwiloWdonec all.com c s r° • ko u, u O DRAWN BY: KLH HALL&HALL ENGINEERS,INC. --. SHEET J° CHECKED BY: SRW City Of LwwbL.dOnaai*NWAUWIJW UV DISINFECTION SYSTEM QUANTITIES AND ESTIMATE REFERENCE 3 APPROVED BY: JDG 1860 BOYSON ROAD,HIAWATHA,IOWA 52233" 4 PHONE:(319)362.9548 FAX:(319)362-7595 DATE: 2/19/2016 o A I R F A X CIVIL ENGINEERING•LANDSCAPE ARCHITECTURE { IN THE GTY aF FAIRFAX, UNN COUNTY, IOWA FIELD BOOK: --- NO. REVISION DESCRIPTION APPROVED DATE LAND SURVEYING•LAND DEVELOPMENT PLANNING vrvw.haleng.com SCALE:NO SCALE PROJECT N0: 6950-15-04 v