Walsh Construction Company II LLC 6/7/2021

Bidder Comments Form Document Title: Replacement of Reservoir 2 Bidder Question Log Date: 3/3/2021 Item No. Dwg/Fig No, Reviewer's Comments Comment by Designer's Response Drawings,Specs,Report or Other Document(Refer to document below In Comments) ENTER SHEET NUMBER OR SPEC NUMBER BIDDER COMMENTS COMPANY RESPONSE Sheet C410 Key Note 01 and C3 state to Restrain All Existing Joints 340ft and 400ft up stream.This looks like it will encroach into the school's asphalt area.Is it the City's intention to have the contractor dig into the School's Asphalt area and restrain the joints,then repair all the AC that was damaged?What is the asphalt section detail are we to follow?Please Clarify this scope Walsh Group more and show limits of joint restraints on existing 36"and 48"STL water lines into the School's property. Repair of AC is included in the Measure and Payment for the joint restraint bid items There does not seem to be a Thrust block sizing chart for contractor's to follow.Please provide a Walsh Group thrust block sizing chart for us to follow to properly size our thrust blocks. All thrust blocks have been sized as gravity blocks,"dead man".Total size Is given in the key note. Please provide the test pressure for'Alignment"G"'on Sheet C490. Graham 210 psi Is the intent for System 203 to be FBE only on couplings,dismantling joints,etc? Graham Correct.Steel pipe is tape coated per 33 11 10.46 Can you please provide the number of yards the thrust block for callout E2 will be?It displays as 1 TB—X CY on sheet C420 Graham See Addendum No 4 1.In general,where multiple circuits are grouped together with a single conduit size shown,yes-it is expected that the circuits shown are to be grouped together in that single conduit. 2.All DC wiring should be run in separate conduit(s)from AC wiring.In general,"data"is DC and can be run with other DC wiring, There are locations where multiple pipe tags are grouped together and a single conduit size is unless specifically shown as being run in dedicated conduit. shown.In some instances,there are both DC 120v and Data cables beingcombined and ran VECCA 3.The specific circuits indicated(cktr 26-34 and 36-45)are all DC circuits(PLC should have all DC I/O).Ckt 35 is PoE(Power over through this single pipe.Also there are upwards of(120)cables being ran through a single 4", Ethernet)which is a combination of DC power and Ethernet(data,which Is also"DC")In a single Ethernet cable. both DC 120v and Data.Please confirm that this is what is expected,wherever a grouping is 4.If there are DC/data circuits shown grouped with AC circuits in a single conduit,this would be an error. shown with a conduit tag,to combine all tags into the specified conduit.Attached are some 5.Note:Where multiple circuits are grouped,only one Equipment Grounding Conductor(EGG)is required in the common raceway examples where this occurs,also the schedule showing the associated wires (as allowed per NEC).Multiple EGCs should not be run. Due to the diameter and area of the floor and roof slabs a monolithic pour for both could be challenging to complete in one day due to the recent market challenges we are experiencing of obtaining the quantity of concrete finishers we will need for these pours. This is a quality Ward Henshaw control concern,as such,we are requesting a CI detail be provided by addendum for both the floor and roof slabs to allow us the option to pour these slabs in halves? See Addendum No 4 Reservoir Roof vent conflicts:Drawing M4(Sheet 102)sheet note 1 states the roof vent is to be a 24"vandal pressure vacuum vent by Newlins Tank.However,the detail 1/59 and the other details on drawing M4 show a 36"diameter vent.We contacted the manufacturer(Newlins Tank)and they cannot manufacture anything larger than a 24"vent and would not quote the project as currently designed.Per specification 331610.10 part 2.1.F it calls for a "manufacturer"vent to be sized to meet the minimum fill rate of 14,000 gpm and empty flowWard Henshaw rate of 67,000 gpm.The manufacturer(Newlins Tanks)has indicated the largest vent they can manufacturer is 24"and they could not guarantee It could meet these fill and flow rates. We are currently unable to find a manufacturer that can fabricate this type of vent larger than 24" diameter. Please advise. See Addendum No 4 Sheet No.66,Detail 5 calls out an underslab insulation.Please provide the insulation See Addendum No 4 specifications Walsh Group 11111 — 11111 — r — — —