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HomeMy WebLinkAboutAddendum No. 3 ADDENDUM # 3 CITY OF CAPE CANAVERAL BID #2016-03 CITY OF CAPE CANAVERAL WWTP IMPROVEMENTS FOR OXIDATION DITCH REHABILITATION June 24, 2016 All contents of this addendum shall be incorporated into the solicitation documents and the ensuing contract with the awarded contractor. • Questions will be accepted up to seven days prior to the bid opening. The last day questions and RFI’s for this bid is June 23, 2016. No further questions or RFI’s will be accepted after that date. • Addendums may be issued up to 72 hours prior to the bid opening due time. Brief addenda may be issued between 72 hours and 24 hours before Bid time by e-mail or facsimile. It is the responsibility of all potential bidders to ensure they have received all addendums issued. • All documents pertaining to this solicitation may be obtained free of charge on CD from the City of Cape Canaveral, City Clerk’s Office, 105 Polk Avenue, Cape Canaveral, FL 32920. A. QUESTIONS RECEIVED DURING BIDDING 1. Division 11- Equipment Section 11287 within the Table of Contents calls out Fabricated Aluminum Slide and Weir Gates. The body of that particular spec section calls for the gates to be stainless steel. Please clarify what material the weir and slide gates will be made of. Answer: Refer to change to Table of Contents under Specification Changes below. 2. Revised sheet D-504, Detail 2 per Addendum 1 – The elevation for the wall mounted weir gate is not legible. Please clarify the elevations for the weir gate. Answer: Page 1 of 5 3. If you refer to specification section 11376 2.02 B6, O-Rings Between Discs and Retainer Rings. I would like to request to change those specifications to Aquarius’. Answer: Manufacturers and Suppliers seeking to submit alternates or a request for equivalency on any material listed within this project shall not do so during the solicitation process. Alternate submittals can be submitted to a potential bidder. If Bidder so chooses, the alternate submittal can be listed in Section 00300 – Bid Form (Substitution List of Manufacturers/Suppliers located on Page 00300-9) within their submittal and the alternate or request will be reviewed by the City of Cape Canaveral and the Engineer after an award has been made, only if it has been submitted by the awarded Bidder. 4. In 2.02 B1, “drop pipes shall be a minimum of schedule 10 or 12 gauge.” In the design our drop pipe diameter is 6”. Thus, for 12GA a Schedule 5S should be used and for 11GA a Schedule 10S should be used. Answer: Refer to change to Section 11376 – Fine Bubble Diffused Aeration System and Section 15066 – Stainless Steel and Fittings under Specification Changes below. 5. It appears from specification sheet, section 1.03 B, that testing is requested. However, the section itself is a bit vague. Could we, instead, send data curves showing that the diffusers will meet the specifications in lieu of having a test? Answer: Data curves are not acceptable. Provide clean water performance tests in accordance with the latest ASCE Clean Water Test Procedures as specified. Alternatively, submit certified test report from previous oxygen transfer testing performed in accordance with ASCE Standards. Test reports shall be for testing same diffuser model proposed at specified submergence and at diffuser densities equivalent to the actual tank configuration. Previous test results which do not meet the testing requirements specified herein will not be acceptable. 6. Due to the last minute nature of the bidding process we request that the required numbers of copies be reduced to 1 original and 1 copy in lieu of triplicate. This would allow us more time to evaluate the scope and pricing we are receiving in order to provide the City of Cape Canaveral with the most competitive price in lieu of closing the bid early in order to allow time to fill out all required copies of the bid form. Answer: Submit as specified. 7. Per the Bid Form page 00300-2 the Trench Safety Affidavit (Section 00490) is required to be submitted, however this information is also contained in article 7 page 00300-3 of the Bid Form. Please confirm that we do need to submit this duplicate information on Section 00490 in addition to page 00300-3 of the Bid Form. Answer: Submit as specified. 8. Are separate HOA switches mounted to stanchions required for the all the actuators furnished under Specification 15100? Or is the HOA acceptable on the actuator itself? Answer: HOA on the actuator is acceptable. 9. Please provide a detail for the ARV as shown on the air piping to the east of the blower (D-103). What size is the ARV? Answer: There is not an ARV on the air piping. Provide Pressure Relief Valve per Specification 11450. Page 2 of 5 10. Reference D-103, for the tie-ins to the MLSS, do you mean "MJ Sleeves" when "Flanged Restrained Couplings" are noted? Answer: Reference D-102, Cut-in and connections to existing pipe may use MJ sleeves or flanged restrained coupling. 11. When the Oxidation Ditch is fulling drained, the plant will be losing 460,000 gal (per bid form) of wastewater from the system. When the Oxidation is put back into service, will the Contractor be responsible for re-seeding the 460,000 gal of wastewater? If so, can this be added as an allowance? If not, where does the City intend on receiving the sludge from? Answer: Note the 460,000 gallons listed in the bid form is to establish a unit cost, refer to bid item 4 in Section 01025. Mixed liquor from the flow equalization basin, which will serve to provide temporary aeration volume during construction at the oxidation ditch can be used for seeding the oxidation ditches. 12. 11312. 2.01, D calls for (2 ea) 30" linestops. Please confirm these are in fact required and where they are to be located. Answer: It is the Contractor’s responsibility to review the plans and determine whether bypass pumping and line stops are required to maintain treatment during construction. Anticipated bypass pumping needs are summarized in Section 11312. Depending on Contractor’s means and methods additional bypass pumping may be needed. Contractor shall provide primary and secondary line stops at each pipe segment needing to be isolated. 13. 11312, 2.01, E calls for a temporary flow meter. This meter is also shown on Section D on D-301, correct? Is this pump out location to be used to drain the Oxidation Ditch? Answer: It is the Contractor’s responsibility to review the plans and determine whether bypass pumping and line stops are required to maintain treatment during construction. Anticipated bypass pumping needs are summarized in Section 11312. Depending on Contractor’s means and methods additional bypass pumping may be needed. Contractor shall provide temporary flow meter for each bypass pumping operation to monitor flows. Refer to Bid Item 4 in Section 01025 regarding draining requirements for the oxidation ditch. 14. 11312 - Bypass Pumping System - Will the City allow the Contractor to tap into the City's electrical system for use of the primary bypass pump? Will the City pay for the electrical usage of this pump? Answer: Provide bypass pumping in accordance with Section 11312. The Contractor is responsible for providing power source and paying all costs for operating the bypass pumping system. 15. 11312 -If the City does not pay for the electrical on the bypass pumps, will the City pay for the fuel usage of the bypass pumps? Answer: Refer to Answer #14 above. 16. Is there a means to isolate the effluent flow from the Anoxic basin #1 into the effluent 30in MLSS piping? Answer: There is an existing 4 x 4 foot by 2 ft deep weir box at the effluent (refer to revised Drawing D-102 under Drawing Changes below). Contractor can operate bypass pump to maintain water level below top of box elevation (EL = 16.1 +/- ft). Additional precautions should be taken which may include installing temporary cover over box inlet, installing plug in pipe inlet, or plug by other means. Page 3 of 5 17. If not, can one side of the 1st Anoxic Basins be taken offline to facilitate installation of the new Effluent valves? Answer: Contractor should plan for maintaining operation of both anoxic basins at all times. Exceptions may be considered during construction on a case-by-case basis. 18. How long can the Anoxic Basin function on half capacity? Answer: See responses above. 19. Does the first Anoxic Basin have isolation gates at the influent channel? Answer: Yes. Refer to revised Drawing D-102 under Drawing Changes below. However, please note that Contractor should plan on keeping both basins online at all times. B. SPECIFICATION CHANGES: 1. Table of Contents: DELETE Page iii in its entirety and REPLACE with attached Page iii. 2. Section 11376 – Fine Bubble Diffused Aeration System: DELETE Paragraph 2.02.B.1. in its entirety and REPLACE with the following: “1. Drop pipes shall be Type 304L stainless steel pipe meeting requirements of Section 15066. The pipes shall extend from approximately 3 feet above the top of the process tank to point 3 feet above the air grid manifold. A flanged connection with a 150lb drilling shall be provided at the top of the pipe and a Type 304L stainless steel gasketed coupling shall be provided for connection to the manifold.” 3. Section 15066 – Stainless Steel Pipe and Fittings: DELETE Paragraph 2.02.B in its entirety and REPLACE with the following Paragraph 2.02.B. “B. Stainless steel pipe and fittings 6-inches in size and larger shall be Schedule 5S or 12 gauge. Stainless steel pipe and fittings smaller than 6 inches in size shall be Schedule 10S or 10 gauge.” C. DRAWING CHANGES: 1. Drawing D-102 – Yard Piping Plan Equalization/Anaerobic 1st Anoxic Basins: DELETE Drawing D-102 in its entirety and REPLACE with attached Drawing D-102. BID DATE REMAINS JUNE 30, 2016 AT 2:00 P.M. Page 4 of 5 All prospective bidders are hereby instructed not to contact the City of Cape Canaveral Council, City Manager, or City of Cape Canaveral Staff members other than the noted contact person regarding this Invitation to Bid or their bid proposal at any time during the bid process, all the way up to an award. Any such contact shall be cause for rejection of your bid proposal. ALL OTHER SPECIFICATIONS AND CONDITIONS REMAIN UNCHANGED. RECEIPT OF THIS ADDENDUM IS HEREBY ACKNOWLEDGED ____________________________________________________ NAME OF BUSINESS BY: ________________________________________________ SIGNATURE/DATE ___________________________________________________ NAME & TITLE, TYPED OR PRINTED ___________________________________________________ MAILING ADDRESS ___________________________________________________ CITY, STATE, ZIP CODE Page 5 of 5 CITY OF CAPE CANAVERAL WWTP IMPROVEMENTS FOR OXIDATION DITCH REHABILITATION TABLE OF CONTENTS (Continued) Section Title RSS/snr/slh/specs/s-1/toc-Add3 Tt #200-52528-13003 iii 062316 02200 Earthwork 02934 Solid Sodding DIVISION 3 - CONCRETE 03100 Concrete Formwork 03200 Concrete Reinforcement 03250 Concrete Joints and Joint Accessories 03300 Cast-in-Place Concrete 03350 Concrete Finishes 03600 Grout 03740 Modifications and Repair to Concrete DIVISION 4 – MASONRY 04230 Reinforced Unit Masonry DIVISION 5 - METAL 05500 Miscellaneous Metal DIVISIONS 6 - 8 NOT USED DIVISION 9 - COATINGS 09900 Painting 09905 Piping, Valve and Equipment Identification DIVISION 10 NOT USED DIVISION 11 - EQUIPMENT 11287 Fabricated Stainless Steel Slide and Weir Gates 11312 Bypass Pumping System 11376 Fine Bubble Diffused Aeration System 11377 Oxidation Ditch Aeration Equipment 9" PALMDROP INLETTOP 5.92SVPUMPPUMPELEC PANELSHUT OFF VALVESVSVCO ELECTRICALSPIGELEC PANEL6" DIP6" PVC6" DIP6" DIP18" DIPTOP 7.5724" DIPSVSV8" OAK10" DIP18" DIP60" RCP24" DIPSPIGSPIGSPIG12" DRAINCATWALKPUMPSPIG7.26.66.66.77.47.47.57.87.67.37.77.27.46.97.37.07.06.66.76.66.76.66. 8 6.96. 8 6.97.07. 0 6.97.17.27.07.27.37.27.27.47.17.07.66. 8 6.76.66.56.77.517.228.158. 2 48.277. 3 06.676. 1 8 6.45 6.676.666.486.536.586.43 6.826.766.68 6.87 5.866. 1 2 6.736.666.846.756. 8 5 6.666.586. 4 6 7777 7 6 77 30" MJ PLUG VALVE5(029((;,67,1*0-ƒ%(1'& INSTALL 30" X 30" MJ TEE(SEE SHEET D-101)CMU BAFFLEWALL0-ƒ%(1'(TYP)SEE NOTE #1125 HP BLOWER WITHVFD & ENCLOSURE30" DIP16" DIP30" X 30" TEE MJ24" X 16" TAPPINGSLEEVE AND VALVEEXISTING 30" DIP TOSECOND ANOXIC BASIN30" MJ PLUG VALVE(TYP)36" DIPEXISTING EDGEOF PAVEMENTSEE NOTE #1CONCRETE PADT/SLAB EL=7.00'CONCRETE PADDESIGNATED AREA FORTEMPORARY IR PUMP(S)T/SLAB EL=MATCHT/ASPHALT (SEE NOTE 5)ƒ%(1')/*1D-501PIPE SUPPORT(TYP)FUTURE 1/2" PVCCARBON FEEDEXISTING PANEL TOREMAIN36" X 30" REDUCER MJƒ%(1'0-30" PLUG VALVE FLGDETAIL1G-001SCALE: 1" = 10'REMOVABLEBOLLARD (TYP)6D-501EXISTING EDGEOF PAVEMENT2D-503BOLLARD (TYP)EXISTING EDGEOF PAVEMENT1st ANOXIC BASINSFLOW EQUALIZATION BASINBASINSPRETREATMENTSTRUCTURE8.14'15.5'CD-301SEE SHEET D-103 FOR FLOWEQUALIZATION BASIN PLANCUT IN MJ SLEEVE ANDSPOOL PIECE AND FLANGEDRESTRAINED COUPLING(SEE SHEET D-101)5D-501EXISTING 24" DIP TOFIRST ANOXIC BASIN7.0CONCRETE PAD WITH TEMPORARYIR PUMP CONNECTIONST/SLAB EL=7.50'REMOVABLE BOLLARDCUT IN MJ SLEEVE ANDSPOOL PIECE AND FLANGEDRESTRAINED COUPLING(SEE SHEET D-101)SEE NOTE 6FUTURE 1/2" PVCCARBON FEEDCUT, COLLECT DRAINS, AND INSTALL 16" FPC, 16"x12"TEE MJ, 16" PV MJ, AND 12" PV MJ (SEE NOTE 7)OPEN CUT ANDPAVEMENT RESTORATIONƒ%(1'0-ƒ%(1'0-12" DIP REJECT FMINSTALL 16"x12"TEE (MJ)5D-504OPEN CUT ANDPAVEMENT RESTORATION5D-504OPEN CUT(TYP)PROTECT ANDTEMPORARY SUPPORTTHE EXISTING PIPEEXISTING STORM SEWER(FIELD VERIFY SIZE AND LOCATION)4'X4' ALUMINUM BOX723(/(9“%27720(/(9“(SEE DETAIL 2 THIS PAGE)EXISTING WEIR GATESECOND ANOXIC BASIND-50130" PLUG VALVE FLGFUTURE SUPPLEMENTALCARBON STORAGE ANDFEED FACILITY1D-503FIRST ANOXIC BASINCONCRETE PAD WITH TEMPORARYIR PUMP CONNECTIONSREMOVABLE BOLLARD6D-501CUT, COLLECT DRAINS, AND INSTALL 16" FPC, 16"x12"TEE MJ, 16" PV MJ, AND 12" PV MJ (SEE NOTE 7)2D-503PAVEMENT RESTORATION5D-504www.tetratech.com MARK DATE DESCRIPTION BY 6/24/2016 8:45:56 AM - P:\IER\52528\200-52528-13003\CAD\SHEETFILES\D-104 DEMOLITION AND YARD PIPING PLAN - OXIDATION DITCH.DWG - SANFORD, CHADWICK 1ABCDEF234567Bar Measures 1 inchCopyright: Tetra Tech WWTP IMPROVEMENTS FOR OXIDATION DITCH REHABILITATION 201 EAST PINE STREET, SUITE 1000 ORLANDO, FL 32801 PHONE: (407) 839-3955 FAX: (407) 839-3790 Rasesh R. Shah, P.E. P.E. No. 68314, FL 201 East Pine Street, Suite 1000 Orlando, Florida 32801 Engineering Business No. 2429 ________________________ DATE ______________BID SETD-102YARD PIPING PLAN EQUALIZATION/ ANAEROBIC/ 1st ANOXIC BASINSNOTES0SCALE:5'10'20'1" = 10'N1.SEE SHEET D-103 FOR THE DIFFUSER LAYOUT.2.ALL PIPE JOINTS SHALL BE RESTRAINED JOINTS.3.PROVIDE REMOVABLE BOLLARDS PER DETAIL 6, SHEET D-501 WHERENOTED. ALL OTHER BOLLARDS SHALL BE STANDARD BOLLARDS PERDETAIL 5, SHEET D-501.4.REFER TO SECTION 01900 FOR SUGGESTED SEQUENCE OFCONSTRUCTION.5.CONTRACTOR SHALL PROVIDE TEMPORARY TRAFFIC CONES,BARRICADES, OR OTHER ENGINEER APPROVED METHOD TO PROTECTIR PUMPS DURING CONSTRUCTION.6.RESTRAIN FITTINGS LOCATED ALONG EXISTING PIPE WHEREMECHANICAL RESTRAINING DEVICES ARE NOT ALREADY PROVIDED.7.THE CONTRACTOR SHALL CLEAN EXISTING 16" FM REJECT PIPEBETWEEN FLOW EQUALIZATION BASIN AND THE EXISTING MOTORIZEDVALVE. LEGALLY DISPOSE REMOVED CONTENTS.8" DR 11 6/15/16 RSS 6/24/16 CIS11 11124'X4' ALUMINUM BOX723(/(9“%27720(/(9“DETAIL2D-102SCALE: NTS22 2