Addendum 2 (2023_1109).pdf

ADDENDUM NO. 2

DATE: November 9, 2023

OWNER: City of Covington

PROJECT: Water Reclamation Facility Improvements

C & S PROJECT NO.: C8370.025

ENGINEER: Martin C. Boyd, P.E.

CARTER & SLOOPE, INC.

1031 Stonebridge Parkway

Watkinsville, Georgia 30677

Telephone: 706-769-4119

Email: mboyd@cartersloope.com

BID DATE: November 17, 2023 BID OPENING: 10:00 AM Local Time

TO ALL BIDDERS:

DOWNLOADING THIS ADDENDUM THROUGH QUESTCDN IS YOUR ACKNOWLEDGMENT

OF RECEIPT. NO OTHER ACTION IS NECESSARY TO ACKNOWLEDGE RECEIPT. THIS

ADDENDUM FORMS A PART OF THE BID DOCUMENTS WHICH ARE HEREBY MODIFIED IN

THE FOLLOWING RESPECTS:

We anticipate releasing another addendum to address unanswered questions on or before November 13, 2023, so if your question(s) have not been addressed in this addendum, it should be in Addendum 3.

I. Questions / Answers

1. Question: Can you provide a copy of the pre-bid conference sign-in sheet?

Answer: Yes, see attached.

2. Question: Can you provide the address of the City’s Land Application Site where spoils can be placed? Also, where on the site can they be placed?

Answer: The address of the Land Application System Service Road entrance off of S.R. 36 is: 10792 Hwy 36, Covington, GA 30014. The City will designate an area somewhere on the LAS property to allow the contractor to stockpile spoil materials depending on the cubic yards of material. The Contractor will be required to provide temporary grassing on the stockpiled material. Any other soil erosion and sediment control measures will be provided by the City.

3. Question: Per Drawing I-100, it said drawings for existing PLC Panels could be provided if requested. Could you please provide drawings for these?

Answer: Yes, these are available to Plan Holders on the online bid page in QuestCDN.

4. Question: Will the fees of a Building Permit be Waived by the County?

Answer: The Owner will pay any Building Permit fees required directly to Newton County.

5. Question: Is there any information that can be provided regarding the manhole where influent flows will be picked up to bypass the Headworks Junction Box? Knowing the depth of the manhole will greatly help in pump selection

Answer: Yes, all flows coming into the headworks, except for the 12” drain line from the existing sludge Dewatering Building, enter a junction box just prior to the Headworks. See image below from Sheet 14 of the Drawings that shows the junction box clouded in red. The depth is shown in Section F-F on Sheet 19.

6. Question: Can the average day and peak daily flows from the gravity sewer and force main be provide for sizing the bypass pump system?

Answer: See below estimates from the City of Covington

Source

Average Daily

Flow (MGD)

Peak Daily

Flow (MGD)

Peak Hour

Flow (MGD)

30” Gravity 1.5 3.1 7.75

24” Force Main from Eastside PS 1.0 2.5 3.5

10” Plant Drain FM from Plant

PS*

1.0 1.0 1.0

Total Flow to Junction Box 3.5 6.6 12.25

12” RAS to RAS Metering Box 2.5 5.6 N/A

12” Drain from Sludge Dewatering Building

0.05 0.07 N/A

7. Question: Within the construction limits of the proposed EQ Basin there were existing concrete pipes and structures staged. Will these be removed prior to the Notice to Proceed, or are these expected to be removed by the Contractor of this project? Are there any other known materials or debris to be removed?

Answer: The City will relocate the concrete pipes and other structures that are within the construction limits of the proposed EQ Basin. There are no other known materials or debris in this area.

8. Question: Will the Owner supply at no cost to the Contractor water to perform tank and structure testing as may be required?

Answer: Yes, the Owner will supply non-potable water for hydrostatic testing as described in Section 01510, Paragraph 2.3, Section 03300, Paragraph 3.9.C and Section 03450, Paragraphs 3.3 and 3.5. In Section 03300, it states that potable water will be supplied unless non-potable water is approved by the Engineer. That is incorrect. All water for hydrostatic testing will be non-potable.

9. Question: Please provide the 100-Year floor evaluation and/or flood design elevation for the project site.

Answer: According to FEMA Flood Insurance Rate Map (FIRM) Number 13217C0129D dated March 17, 2014, the approximate 100-year flood elevation is 617 ft.

10. Question: In reviewing the documents, we do not see a contractor’s laydown area shown.

Please provide the areas that might be available for use by the contractor.

Answer: Areas available for the Contractor’s use as a laydown yard and for construction trailers are shown in the clouded red areas on the attached Sheet 6. Also, Covington has additional property available on or next to the WRF (see image below-property is outlined in cyan color) plus land available across the street at their LAS site located at 10792 Hwy 36, Covington, GA 30014. It is preferred that wooded, undisturbed areas on the WRF site or east side of Puckett St. NW next to the WRF be used as a last resort. If contractor needs these areas, they will be responsible for all clearing, grubbing, temporary and permanent soil erosion and sediment control measures and all maintenance, security and protection of these sites if used. The contractor will work with the Engineer to modify the NOI and the Soil Erosion and Sediment Control Plan if the wooded areas are disturbed .

11. Question: With the change in bid date for the project, will the deadline to submit the Qualification package for the General Contractor also be changed? As of right now, Quest still shows it being due November 16th. Either way, right not the “upload” function is not available for this document.

Answer: Yes, the date will be changed. The online Bid Form is being updated as part of Addendum #2.

12. Question: Will the City dispose of the sand and any sludge remaining in the drying beds to be demolished?

Answer: Yes, the City will dispose of any remaining sand and sludge in the drying beds.

II. SUBSURFACE INVESTIGATION REPORT

A. Portions of the Subsurface Investigation Report by GeoSystems Engineering, Inc. were inadvertently included in the download file called: C8370.025 Quest 8709163 Bid Files (2023_1006).pdf. Refer to pages 1026 to 1051 of 1172 pages in the download PDF. Those pages can be removed or ignored in the PDF file. The pages that can be removed are:

PDF Page No. 1026 to 1029: Figures 1 through Figure 4 PDF Page No. 1030: Keys to Symbols and Classifications PDF Page No. 1031 to 1042: Log of Boring B-1 to B-8 PDF Page No. 1043 to 1051: Appendix C including the attached Particle Size Analys and

Atterberg Limits.

B. The complete Subsurface Investigation Report is available to plan holders for download as a separate document at QuestCDN.

C. Question: Please confirm that the new EQ basin is the only structure requiring aggregate piers.

Answer: Yes, the new EQ Basin is the only structure requiring aggregate piers.

III. CONTRACT DOCUMENTS AND SPECIFICATIONS

1. Pre-Bid Submittal for Equipment and Materials In accordance with Section 01300 of the specifications, the following manufacturers have met the pre-bid submittal requirements. Each bidder’s attention is directed to Section 00400, 01025 and 01300 in completing the Bid Form. Listing of equipment herein does not constitute approval.

Final approval will be made after bids are received if manufactures listed below affects the low bids and if materials and equipment are determined by the Engineer to be equal to the specifications based on the pre-submittal received.

A. Section 09900

1. PPG

2. Sherwin-Williams

B. Section 11300

1. Perry Fiberglass Product, Inc.

C. Section 11400

1. Dexter Fortson Associates, Inc.

2. Section 00003 – Table of Contents A. Strike Section 01570 – Traffic Control from the Table of Contents. It is not needed.

3. Section 00200 – Instructions to Bidders

A. Refer to Article 3.01. Add the following at the end of this paragraph: “B. Section 00484” Question: It was brought up during the pre-bid meeting that the list for subcontractors and suppliers could be submitted 5 days post bid. Will all submitting GC’s submit the lists, regardless of low bidder status?

Answer: Yes, all bidders will be required to submit Section 00470 within 5 days of bidding.

Section 00470 requires, among other things, the Bidder to list the major wequipment and suppliers (Schedule C) and list of subcontractors (Schedule D). Since the list of subcontractors does not have to be submitted with the Bid, Section 00484 may be submitted within 5 days of bidding too.

B. Refer to Article 5.04.C. This Paragraph shall read:

“All access to the Site other than during a regularly scheduled Site visit must be coordinated through the following Owner or Engineer contact for visiting the Site: Mr. Brian Yoder, Assistant Water Resources Director, (706) 385-2035. Bidder must conduct the required Site visit during normal working hours.

C. Add the following to this Section

“ARTICLE 25—SALES AND USE TAXES

25.01 The Owner intends to request a reimbursement from the Georgia Department of Revenue on sales and use taxes paid on equipment purchased for the primary purpose of reducing or eliminating water pollution. The Contractor will include in his lump sum price all costs to assist the Owner and Engineer with completing and submitting Forms ST-12 and ST- 12(a) and other forms as required by the Georgia Department of Revenue.

D. Add the following to this Section:

“ARTICLE 26—WAGE RATE REQUIREMENTS

26.01 If the contract price is in excess of $100,000, provisions of the Contract Work Hours and Safety Standards Act at 29 CFR 5.5(b) apply.”

4. Section 00400 – Bid Form A. The online Bid Form will be updated on QuestCDN to address questions we received during the Pre-Bid Conference to address base bid, accepted equal and substitute equipment pricing and allowances.

5. Section 00800 – Supplemental General Conditions A. Refer to Article 2 – Preliminary Matters. Add the following:

“SC-2.06 Delete Paragraphs 2.06.B and 2.06.C in their entirety and insert the following in their place:

B. Electronic Documents Protocol: The parties shall conform to the following provisions in

Paragraphs 2.06.B and 2.06.C, together referred to as the Electronic Documents Protocol (“EDP” or

“Protocol”) for exchange of electronic transmittals.

1. Basic Requirements

a. To the fullest extent practical, the parties agree to and will transmit and accept Electronic

Documents in an electronic or digital format using the procedures described in this

Protocol. Use of the Electronic Documents and any information contained therein is subject to the requirements of this Protocol and other provisions of the Contract.

b. The contents of the information in any Electronic Document will be the responsibility of the transmitting party.

c. Electronic Documents as exchanged by this Protocol may be used in the same manner as the printed versions of the same documents that are exchanged using non-electronic format and methods, subject to the same governing requirements, limitations, and restrictions, set forth in the Contract Documents.

d. Except as otherwise explicitly stated herein, the terms of this Protocol will be incorporated into any other agreement or subcontract between a party and any third party for any portion of the Work on the Project, or any Project-related services, where that third party is, either directly or indirectly, required to exchange Electronic Documents with a party or with Engineer. Nothing herein will modify the requirements of the Contract regarding communications between and among the parties and their subcontractors and consultants.

e. When transmitting Electronic Documents, the transmitting party makes no representations as to long term compatibility, usability, or readability of the items resulting from the receiving party’s use of software application packages, operating systems, or computer hardware differing from those established in this Protocol.

f. Nothing herein negates any obligation 1) in the Contract to create, provide, or maintain an original printed record version of Drawings and Specifications, signed and sealed according to applicable Laws and Regulations; 2) to comply with any applicable Law or Regulation governing the signing and sealing of design documents or the signing and electronic transmission of any other documents; or 3) to comply with the notice requirements of

Paragraph 18.01 of the General Conditions.

2. System Infrastructure for Electronic Document Exchange

a. Each party will provide hardware, operating system(s) software, internet, e-mail, and large file transfer functions (“System Infrastructure”) at its own cost and sufficient for complying with the EDP requirements. With the exception of minimum standards set forth in this EDP, and any explicit system requirements specified by attachment to this EDP, it is the obligation of each party to determine, for itself, its own System Infrastructure.

1) The maximum size of an email attachment for exchange of Electronic Documents under this EDP is 20 MB. Attachments larger than that may be exchanged using large file transfer functions or physical media.

2) Each Party assumes full and complete responsibility for any and all of its own costs, delays, deficiencies, and errors associated with converting, translating, updating, verifying, licensing, or otherwise enabling its System Infrastructure, including operating systems and software, for use with respect to this EDP.

b. Each party is responsible for its own system operations, security, back-up, archiving, audits, printing resources, and other Information Technology (“IT”) for maintaining operations of its System Infrastructure during the Project, including coordination with the party’s individual(s) or entity responsible for managing its System Infrastructure and capable of addressing routine communications and other IT issues affecting the exchange of Electronic

Documents.

c. Each party will operate and maintain industry-standard, industry-accepted, ISO-standard, commercial-grade security software and systems that are intended to protect the other party from: software viruses and other malicious software like worms, trojans, adware;

data breaches; loss of confidentiality; and other threats in the transmission to or storage of information from the other parties, including transmission of Electronic Documents by physical media such as CD/DVD/flash drive/hard drive. To the extent that a party maintains and operates such security software and systems, it shall not be liable to the other party for any breach of system security.

d. In the case of disputes, conflicts, or modifications to the EDP required to address issues affecting System Infrastructure, the parties shall cooperatively resolve the issues; but, failing resolution, the Owner is authorized to make and require reasonable and necessary changes to the EDP to effectuate its original intent. If the changes cause additional cost or time to Contractor, not reasonably anticipated under the original EDP, Contractor may seek an adjustment in price or time under the appropriate process in the Contract.

e. Each party is responsible for its own back-up and archive of documents sent and received during the term of the contract under this EDP, unless this EDP establishes a Project document archive, either as part of a mandatory Project website or other communications protocol, upon which the parties may rely for document archiving during the specified term of operation of such Project document archive. Further, each party remains solely responsible for its own post-Project back-up and archive of Project documents after the term of the Contract, or after termination of the Project document archive, if one is established, for as long as required by the Contract and as each party deems necessary for its own purposes.

f. If a receiving party receives an obviously corrupted, damaged, or unreadable Electronic

Document, the receiving party will advise the sending party of the incomplete transmission.

g. The parties will bring any non-conforming Electronic Documents into compliance with the

EDP. The parties will attempt to complete a successful transmission of the Electronic

Document or use an alternative delivery method to complete the communication.

h. The Contractor will operate a Project information management system (also referred to in this EDP as “Project Website”) for use of Owner, Engineer and Contractor during the Project for exchange and storage of Project-related communications and information. Except as otherwise provided in this EDP or the General Conditions, use of the Project Website by the parties as described in this Paragraph will be mandatory for exchange of Project documents, communications, submittals, and other Project-related information. The following conditions and standards will govern use of the Project Website:

1) The Project Website shall be operated and available commencing on the Notice to Proceed date, running uninterrupted throughout the Contract period until termination at the end of the Contract Time as defined in the Agreement.

2) Contractor shall refer to Section 01300 – Submittals for system infrastructure, software licensing, electronic services, and security standards for accessing and using the Project Website.

3) Contractor shall include all costs for the Project Website in the Base Bid pricing.

C. Software Requirements for Electronic Document Exchange; Limitations

1. Each party will acquire the software and software licenses necessary to create and transmit

Electronic Documents and to read and to use any Electronic Documents received from the other party (and if relevant from third parties), using the software formats required in this section of the EDP.

a. Prior to using any updated version of the software required in this section for sending

Electronic Documents to the other party, the originating party will first notify and receive concurrence from the other party for use of the updated version or adjust its transmission to comply with this EDP.

b. Costs for the Project Website shall be paid for by the Contractor.

2. The parties agree not to intentionally edit, reverse engineer, decrypt, remove security or encryption features, or convert to another format for modification purposes any Electronic

Document or information contained therein that was transmitted in a software data format, including Portable Document Format (PDF), intended by sender not to be modified, unless the receiving party obtains the permission of the sending party or is citing or quoting excerpts of the

Electronic Document for Project purposes.

3. Software and data formats for exchange of Electronic Documents will conform to the requirements set forth in Exhibit A to this EDP, including software versions, if listed.

SC-2.06 Supplement Paragraph 2.06 of the General Conditions by adding the following paragraph:

D. Requests by Contractor for Electronic Documents in Other Formats

1. Release of any Electronic Document versions of the Project documents in formats other than those identified in the Electronic Documents Protocol (if any) or elsewhere in the Contract will be at the sole discretion of the Owner.

2. To extent determined by Owner, in its sole discretion, to be prudent and necessary, release of

Electronic Documents versions of Project documents and other Project information requested by Contractor (“Request”) in formats other than those identified in the Electronic Documents

Protocol (if any) or elsewhere in the Contract will be subject to the provisions of the Owner’s response to the Request, and to the following conditions to which Contractor agrees:

a. The content included in the Electronic Documents created by Engineer and covered by the

Request was prepared by Engineer as an internal working document for Engineer’s purposes solely, and is being provided to Contractor on an “AS IS” basis without any warranties of any kind, including, but not limited to any implied warranties of fitness for any purpose. As such, Contractor is advised and acknowledges that the content may not be suitable for Contractor’s application, or may require substantial modification and independent verification by Contractor. The content may include limited resolution of models, not-to-scale schematic representations and symbols, use of notes to convey design concepts in lieu of accurate graphics, approximations, graphical simplifications, undocumented intermediate revisions, and other devices that may affect subsequent reuse.

b. Electronic Documents containing text, graphics, metadata, or other types of data that are provided by Engineer to Contractor under the request are only for convenience of

Contractor. Any conclusion or information obtained or derived from such data will be at the Contractor’s sole risk and the Contractor waives any claims against Engineer or Owner arising from use of data in Electronic Documents covered by the Request.

c. Contractor shall indemnify and hold harmless Owner and Engineer and their subconsultants from all claims, damages, losses, and expenses, including attorneys' fees and defense costs arising out of or resulting from Contractor’s use, adaptation, or distribution of any

Electronic Documents provided under the Request.

d. Contractor agrees not to sell, copy, transfer, forward, give away or otherwise distribute this information (in source or modified file format) to any third party without the direct written authorization of Engineer, unless such distribution is specifically identified in the Request and is limited to Contractor’s subcontractors. Contractor warrants that subsequent use by

Contractor’s subcontractors complies with all terms of the Contract Documents and

Owner’s response to Request.

3. In the event that Owner elects to provide or directs the Engineer to provide to Contractor any

Contractor-requested Electronic Document versions of Project information that is not explicitly identified in the Contract Documents as being available to Contractor, the Owner shall be reimbursed by Contractor on an hourly basis at the Engineer’s current rate table for each employee classification at for any engineering costs necessary to create or otherwise prepare the data in a manner deemed appropriate by Engineer.”

B. Refer to Paragraph 14.01. Strike this Paragraph since the services of an independent inspector and testing laboratory will be paid for using an allowance. See changes to Section 01020 below.

C. Add the following Exhibit A to this Section:

EXHIBIT A - SOFTWARE REQUIREMENTS FOR ELECTRONIC DOCUMENT EXCHANGE

Item Electronic Documents Transmittal

Means

Data

Format

Note

(1) a.1 General communications, transmittal covers, meeting notices and responses to general information requests for which there is no specific prescribed form.

Email Email a.2 Meeting agendas, meeting minutes and Contract forms. Email w/

Attachment

PDF (2)

a.3 RFI’s and responses to RFI’s. Project Website PDF a.4 Contactors Submittals (Shop Drawings, “or equal” requests, substitution requests, documentation accompanying Sample submittals and other submittals) to Owner and Engineer, and

Owner’s and Engineer’s responses to Contractor’s Submittals, Shop Drawings, correspondence, and Applications for Payment.

Project Website PDF a.5 Correspondence; milestone and final version Submittals of reports, layouts, Drawings, maps, calculations and spreadsheets, Specifications, Drawings and other Submittals from Contractor to

Owner or Engineer and for responses from Engineer and Owner to Contractor regarding Submittals.

Email w/

Attachment or LFE

PDF

a.6 Layouts and drawings to be submitted to Owner for future use and modification.

Email w/

Attachment or LFE

DWG

a.7 Correspondence, reports and Specifications to be submitted to

Owner for future word processing use and modification.

Email w/

Attachment or LFE

DOC

a.8 Spreadsheets and data to be submitted to Owner for future data processing use and modification.

Email w/

Attachment or LFE

EXC

a.9 Database files and data to be submitted to Owner for future data processing use and modification.

Email w/

Attachment or LFE

DB

Notes

(1) All exchanges and uses of transmitted data are subject to the appropriate provisions of Contract

Documents.

(2) Transmittal of written notices is governed by Paragraph 18.01 of the General Conditions.

Key

Email Standard Email formats (.htm, .rtf, or .txt). Do not use stationery formatting or other features that impair legibility of content on screen or in printed copies

LFE Agreed upon Large File Exchange method (FTP, CD, DVD, hard drive)

PDF Portable Document Format readable by Adobe® Acrobat Reader Version 2021.007.20091 or later

DWG Autodesk® AutoCAD .dwg format Version 2018

DOC Microsoft® Word .docx format Version V2108

EXC Microsoft® Excel .xls or .xml format Version V2108

DB Microsoft® Access .mdb format Version V2108

6. Section 01020 – Allowances

A. Refer to Paragraph 2.A. Add the following:

“2. Testing – The Contractor shall allow the sum as listed in the Bid Form for Cash

Allowance for concrete testing and soil testing. This allowance may be utilized by the

Owner and/or Engineer to pay for any testing required in accordance with Section 01410.

No money from this allowance shall be used to pay for any re-testing of failed tests. The

Contractor shall provide coordination and labor to assist the testing company with collection of testing samples on the jobsite. To receive authorization to use Allowance money to pay for testing services, the Contractor must submit invoices from the approved testing agency with the monthly pay request for review and approval.”

7. Section 01569 – Safety in Wastewater Works A. Insert this Section into the Specifications.

8. Section 02310 – Aggregate Piers

A. Refer to Paragraph 1.1. Add the following:

“D. The aggregate pier contractor shall coordinate with the prestressed concrete tank contractor (Section 03450) to design and install a load transfer platform (LTP), if one is required, between the aggregate piers and the prestressed tank concrete slab since an LTP could affect the tank’s concrete membrane floor slab thickness design. The LTP shall be designed by the aggregate pier contractor and/or the prestressed concrete tank contractor.

Page 12 of the Subsurface Investigation Report by GeoSystems Engineering, Inc. outlines the basic assumptions of the LTP requirements, however, the final design of the LTP materials and thickness will be determined by the aggregate pier contractor and/or the prestressed concrete tank contractor in their coordinated foundation design for the tank floor.”

B. Refer to Paragraph 1.6A

Question: Paragraph 1.6.A requires the aggregate pier contractor to submit project experience with the bid. Please confirm this information can be submitted post award, and prior to starting the pier scope.

Answer: Yes, the aggregate pier contractor may submit their project experience post-award within 5 days of the Bidder submitting their bid in accordance with Section 00200, Article 3.01.

C. Refer to Paragraph 3.2.1.a

Question: Please confirm that the bearing pressure to be used for the EQ basin piers is to be the 2,500 pounds per square foot as noted in Section 3.2.1.a of spec 02310.

Answer: Yes, that is the correct soil bearing pressure. The Bidder should coordinate this information with the prestressed concrete storage tank contractor to ensure the appropriate design of the concrete membrane floor and the load transfer platform.

9. Section 03450 – Prestressed Concrete Storage Tank A. Refer to Paragraph 1.1. Add the following:

“D. The prestressed concrete tank contractor shall coordinate with the aggregate pier contractor (Section 02310) to design and install a load transfer platform (LTP), if one is required, between the aggregate piers and the prestressed tank concrete slab since an LTP could affect the tank’s concrete membrane floor slab thickness design. The LTP shall be designed by the aggregate pier contractor and/or the prestressed concrete tank contractor.

Page 12 of the Subsurface Investigation Report by GeoSystems Engineering, Inc. outlines the basic assumptions of the LTP requirements, however, the final design of the LTP materials and thickness will be determined by the aggregate pier contractor and/or the prestressed concrete tank contractor in their coordinated foundation design for the tank floor.”

B. Refer for Paragraph 1.7.C.1. Add the following at the end of the last sentence:

“3. The concrete membrane floor thickness design shall be coordinated with the aggregate pier contractor (Section 02310) to design a load transfer platform (LTP), if one is required, between the aggregate piers and the prestressed tank concrete slab since an LTP could affect the tank slab thickness.”

C. Refer to Paragraph 2.12. Add the following:

“C. Interior coating system shall consist of the following for walls and dome only:

1. Smooth any holes and surface with TNEMEC N218 applied at 1/16”.

2. Prime with TNEMEC Series 201 at 4.0 to 6.0 mils DFT.

3. Coat with TNEMEC Series G435 at 60.0 to 80.0 mils DFT.

4. Floor will not receive any coating.”

D. Question: In the event of a conflict between Specification 03450 and other specifications or Drawings within the project documents, please confirm that Specification 03450 will govern for the Type II prestressed concrete tank only.

Answer: Yes, these specifications in Section 03450 will govern over conflicts found elsewhere.

10. Section 02500 – Yard Piping A. Refer to Paragraph 3.6.F

Question: Specification 02500, Paragraph 3.6, F. states “Unless otherwise noted, underground piping shall be push-on or mechanical joint with restraints, and above ground piping shall be flanged.” Please confirm the restraint requirements for ductile iron pipes and fittings by service (and/or location), as the spec reference above could be read that all underground piping shall be restrained unless otherwise noted. Please also confirm regarding restraint, that where the drawings call out RJ means a restrained joint (push on restrained joint or mechanical restrained joint) and were called out as MJ means MJ fitting and MJ gland and accessories (not restrained). Do the pipe joints restraint requirement (restrained or unrestrained) follow the fitting restraint call out on the drawings (MJ vs RJ)?

Answer: Underground DIP piping shall be push-on joint in accordance with Paragraph 2.1.A unless noted otherwise on the Drawings. Buried fittings shall be mechanical joint in accordance with Paragraph 2.1.A unless noted otherwise on the Drawings. Above ground fittings shall be flange joint as specified in Section 15062. As shown on Sheet 2 of the Drawings, abbreviation “M.J.” means Mechanical Joint and is defined in Paragraph 2.1.A and “R.J.” means “Restrained Joint” and is defined in Paragraph 2.1.A. Where the Engineer desires “Restrained Joint” pipe or fittings, they are labeled on the Drawings as “R.J.” If it is not labeled as “R.J.”, then push-on pipe, mechanical joint fittings, or flange joints fittings are to be used as designated on the Drawings or where appropriate.

B. Refer to Paragraph 3.9.B. Revise the paragraph to read:

“Thrust Blocking: - Concrete having compressive strength of not less than 3,000 psi shall be used as a cradle or thrust blocking at all mechanical joint bends and fittings, at all changes in direction and where shown on the plans or directed by the Engineer. All mechanical joint bends, crosses with one opening plugged, and all tees shall be backed with concrete as a thrust block. Blocking shall be placed between solid ground and the fitting to be anchored; the area of bearing on the pipe and on ground in each instance shall be that shown on the plans. The blocking shall be so placed that the pipe fitting joints will be accessible for repair. No extra payment will be made for thrust blocks.”

Clarification: Concrete blocking is not required on bends and fittings that are installed with Restrained Joints as defined in Paragraph 2.1.A. The note on Sheets 7 and 8 of the Drawings requiring restrained Joints with Concrete Blocking have been removed.

11. Section 11300 – Two-Stage Odor Control Systems A. Refer to Paragraph 2.3.A. In the table, change “Airflow 650 scfm” to “Airflow 650 acfm”.

Clarification: “scfm” should have been labeled as “acfm”.

12. Section 11400 – Aerator Specifications A. Refer to Paragraph 2.1.I. All references in this paragraph to “Class I Division I Group D” shall read “Class I Division II Group D”.

B. Refer to Paragraph 2.11. Strike this entire paragraph. Anti-erosion assemblies are not required.

13. Section 15100 – Valves and Appurtenances A. Refer to Paragraph 2.8. Add the following:

“B. Electric Actuators

1. Electric actuators shall be provided by the valve supplier for modulating applications as indicated on the Drawings and as specified herein . The valve operators shall be an integral unit and shall consist of motor, gearing, limit switches, torque switches, handwheel, declutch lever, electrical control connections, motor electrical connection, motion assurance circuit, relays, and other components required to perform properly and as described herein. Actuators shall conform without exception to this specification and to the requirements of AWWA C540, latest edition.

2. See Contract drawings for applications where electric valve operators are to be suitable for Class 1, Division 2, Groups C and D hazardous locations/applications.

Submittal documentation shall clearly show all installation requirements for hazardous locations as well as other locations.

3. Electric valve and gate actuators/operators shall be manufactured by EIM, AUMA, Rotork, or Engineer approved equal.

4. Actuators shall be sized by the valve supplier for the application shown and shall be factory mounted and fully tested prior to shipment. Motors shall be sized by the valve and actuator manufacturers to produce a minimum of 1½ times the maximum torque rating and pull rating of the valve. Stall torque of the motor shall not exceed the torque capacity of the valve.

5. The most adverse conditions to be encountered shall be considered when sizing actuators. Drive motor shall be sufficient to open, close, or modulate valves against maximum differential pressure when supply voltage is 90% of the nameplate rating, without loss motion considered and designed for intended service. All gearing shall be designed to withstand the full stall torque of the motor.

6. Motors shall be specifically designed for actuator service. Motors shall be squirrel cage induction type, totally enclosed, non-vented. Insulation shall be Class F, tropicalized and suitable for temperatures of up to 310 degrees F. Motor shall be of the "thermally protected" type, with three (3) thermal switches imbedded in motor windings one hundred twenty (120) degrees apart. Motors shall be powered by 460 volt - 3 phase - 60 hertz power. Motors for modulating and throttling service shall be minimum 30 minute duty rated at the full output rating of the motor. Motor housing shall be aluminum die cast with cooling fins.

7. Motors shall be sized for continuous duty. Motors for actuators in throttling or modulating service on quarter turn valves shall be designed and sized for a minimum of 1,200 starts per hour. Actuators for throttling service shall be specifically suitable for and compatible with valve controllers provided by other equipment manufacturers. Actuator manufacturer shall coordinate as required.

8. Actuators shall be permanently lubricated by the manufacturer and shall be capable of operating in any position, vertical or horizontal.

9. Actuator enclosures shall be furnished with space heaters. The space heater power shall be derived from the main 460 V power to the valve. All motors, gearing switches, wiring terminals and electrical connections shall be completely sealed against the environment and protected against the ingress of water, humidity, and dust. Enclosure shall be rated NEMA 4X/6, watertight. For safety, no exposed wiring or terminals shall be allowed in the switch compartment. Switches (limit and torque) shall be in IP 68 enclosure such that no dirt, dust water, etc. may interfere with the contacts when limit switch compartment is removed. Actuators shall be supplied with a watertight seal between external wiring connection and the actuator housing. This seal shall prevent water ingress due to moisture penetration into conduit or external wiring connections. All external fasteners shall be stainless steel.

10. Actuator service shall be as indicated in the actuator schedule and/or as shown on the Drawings.

11. Actuator controls shall be integral. Remote mounted control modules/packages for remote monitoring, control, display, diagnostics, E. C. shall be provided when specified on the Drawings or when the actuator is inaccessible from the floor or a platform. Actuators shall be furnished with reversing motor contactors, electrically and mechanically interlocked, equipped with auxiliary contacts, control transformer, monitor relay for alarm, red and green high—intensity LED indicating lights. Contactor shall be completely wired to the electrical control assembly shall be contained in a minimum NEMA 4X/6 rated housing integral to the operator.

Control power transformer shall be grounded with fused secondary and capable of transforming 460 V, 3 phase, 60 Hz to regulated 24 VDC. Integral pilot device station must be capable of repositioning at 90 degree increments so the pushbuttons, indicating lights and selector switch are accessible to the operator. Open-stop-close controls shall be by means of a three (3) push buttons and two (2) lights, Green for Open, Red for Closed. Local-Off-Remote control shall be by means of a three (3) position selector switch, padlockable in three positions. Auxiliary contacts shall be provided on the Local-Off-Remote selector switch to facilitate remote indication of switch position. Padlocks shall be provided for each actuator and shall be common keyed with all actuators. Actuator control modules/packages shall be easily wall mountable remote from the actuator if required on the Drawings. The actuator manufacturer shall provide adequate length of all wiring/cable required to fully interface between the control package and the actuator (coordinate during submittal process). Controls modules/packages shall be supplied with internal phase discriminator , monitor relay for collective fault signal and surge protection to 10KV exceeding IEEE 587. An internal phase correction device shall be provided to prevent incorrect phase rotation of three phase actuators. Local valve position shall be accomplished via limit switch contact as well as indication via dial type mechanical position indicator (MDPI). Modulating valves shall meet the above requirements, and shall include solid state starters and solid state comparator circuit (positioner) to accept 4-20 mA command signal, with adjustable controls for span, signal differential, zero and response delay for signal change to eliminate seeking due to signal noise. The position comparator circuit shall include (but not limited to) separate controls for a zero, span and deadband adjustment. LED lamps shall be furnished for indication of control status and shall include as a minimum, indications for open, close and fault. Positioner shall be field adjustable to fail in the open, closed, or last position on loss of signal. One (1) watt mylar potentiometers shall be used and shall be capable of providing linearity of + /- 1 9 and shall be rated for up to 250 degrees F. Internal power supply shall provide regulated 24VDC power to power solid state comparator circuit (positioner) and shall have the capability to supply power to internal, solid state 4—20 mA feedback device. For throttling service, actuators shall be provided with a local and remote momentary contact circuit such that the appropriate actuator contact must be "maintained " in order for the actuator to move in either the open or close direction. Actuator control logic shall be provided to allow simple dip switch changes inside the actuator control housing that will facilitate separate selection of local and/or remote open and close momentary or latching control circuits while in the field.

12. Remote control contacts and relays shall be powered from the actuator and shall be 120 VAC. When in the remote mode, 120 VAC circuits powered by the actuator shall be closed or opened at the remote location to operate the valve. Separate 120 VAC power, produced elsewhere for limit switch interrogation, shall be routed through the auxiliary (dry) limit switch contacts and other alarms or switches, to sense valve position, etc.

13. Provide optical isolators to separate incoming voltage signals from internal motor controls. Provide other appurtenances as required to protect from surges.

14. Provide limits switches at each end of travel. Limit switches with a minimum of twelve (12) contacts rated 5A to 250VAC shall be provided for each operator (3 N.O & 3 N.C for opening and 3 N.O. & 3 N.C for closing- one pair of which shall be dry contacts available for remote voltage interrogation). Limit switches shall be of the DPDT, double break type. Limit switch drive to be of counter gear design and shall be "in step" with the output drive at all times in both the motor drive and manual (handwheel) modes. Limit switches shall be adjustable to change state at any point between or beyond the fully open and fully closed positions, with easy set declutch.

Limit switch adjusting shall be clearly marked as to direction of adjustment. All contacts on the limit switch assembly to be sealed in minimum IP 66 enclosure to maintain the integrity of the contacts and to eliminate shorting out. Indicating lamp circuitry shall include motion assurance to indicate when the operator is in motion, and direction in which it is traveling. Motion assurance shall be wired into lamps on operator, and available for remote light circuits when specified. Position indication shall be accomplished by means of an indicator dial in full step at all times with valve travel, whether in power or manual operation. Limit switch gearing shall be grease lubricated. The drive mechanism shall be totally enclosed to prevent entrance of foreign matter.

15. Each operator shall have a separately adjustable opening torque switch and closing torque switch. Adjustment range shall be responsive to opening or closing loads such that switches operate to protect valve and operator from damage when there is over-torque during opening or closing. All contacts shall be sealed to insure the integrity of the contacts and to eliminate shorting out. When required, opening torque switch shall be able to control predetermined back seating thrust of a valve. Closing torque switch shall control predetermined seating thrust required for torque seating of wedge gate or globe valves. Seating torque shall be constant and independent of wear in valve disc or seat. Torque switches shall be of the SPDT, double break type with contacts rated 5A to 250VAC .

16. Provide with manual over—ride handwheel. Manual operation shall be via gearing to facilitate easy changeover from motor to manual operation when the actuator is under load. Return from manual to electric mode shall be automatic upon motor operation. Declutching mechanism shall allow valve operation by means of permanently attached auxiliary handwheel, meeting O.S.H.A. requirement of no more than forty (40) pounds rim pull effort. The design of the declutch mechanism shall be such that an internal shear mechanism shall prevent damage to the actuator housing due to excessive input torque being applied to the handwheel. Actuation of motor automatically returns the operator to the electric mode. Operation of the motor shall not cause the handwheel to rotate, and operation of the handwheel shall not cause the motor to rotate. Should power be returned to the motor while the handwheel is in use, the design of the unit shall prevent transmission of the motor torque to the handwheel. The handwheel shall have an arrow and the word "OPEN" indicating required rotation. The handwheel shall operate in the clockwise direction to close. External declutch lever will be padlockable in the motor mode.

17. Quarter turn actuator shall be provided with mechanical stops to restrict valve and/or actuator travel.

18. Provide actuators with aluminum or stainless-steel stem covers with a narrow slot to allow observation of the stem position. Provide permanent indicator markings in 1” maximum increments.

19. Power gearing in modulated actuators shall have zero backlash between motor and actuator.

20. The actuators shall include adequate internal circuitry to provide control voltage protection for switches and electronic modules from external voltage surges. Control requirements such as modulating control, 2-wire control, interposing relays etc. shall have gold- or silver-plated contact connectors. Unless otherwise specified, all PC boards must be temperature rated -20° C to 70° C.

21. The actuator shall utilize gearing feedback or other appropriate signal source to indicate gate position to the SCADA system. The position indication method and logic shall be as designed by the gate manufacturer. The gate position signal must be accurate and dependable as it will be used to remotely control plant operations during critical periods. The baseline for measurement shall be coordinated with the SCADA system and Engineer during construction.

22. Provide manufacturer factory technician when needed and at startup to check, adjust and verify proper valve/actuator installation. A factory authorized service representative of the actuator manufacturer shall verify field wiring connections to the actuator prior to electrical power being sent to the actuators. The same service representative shall perform on-site assistance consisting of actuator installation supervision, pre-startup wiring verification, start-up assistance and post commissioning operator training. The technician shall have a minimum of five (5) years’ experience with the manufacturer starting up similar actuators.”

14. Section 15124 – Stainless Steel Slide Gates

A. Refer to Paragraph 2.1.B. Line 7 and 8 should read “Series HG561S, Whipps Series 900, RW Gate Model RW1000-S, Fontaine Aquanox Series 20 or Engineer approved equal.”

Clarification: Fontaine Aquanox Series 200 has been added as an approved equal.

IV. CONTRACT DRAWINGS

1. Sheet 2.

A. Refer to Note 3, Pipe, Valves & Accessories. Strike “304 Stainless Steel” from this note.

Exposed flange bolts and washers to be Grade B, ASTM A-307 carbon steel. This coordinates with Section 15062.

2. Sheet 7.

A. Refer to the callout for ± 19 L.F. 42” DI Pipe. The “19 L.F.” is incorrect and should be labeled “28 LF”.

B. Strike the following note: “Note: Proposed 16” Forcemain to EQ Basin to be Restrained

Joint w/ Conc. Blocking for the Entire length.”

C. Refer to note labeling the work to be done south of the RAS Metering Box. Change “2- 12”

90° Bend, MJ” to read “1 – 12” 90° Bend”. Only 1 - 90° Bend is required at this tie-in.

D. Question: Sheets 7 & 12 show the 12” RAS Precast Meter Vault likely conflicting with a

“UGP” utility. Is the UGP relocated by others, or is the utility to be cut and abandoned in place?

Answer: The underground power utility that may be in conflict with the proposed 12” RAS Precast Meter Vault will not be abandoned. The Contractor should pothole the utility prior to construction to determine the location and coordinate with the Engineer. It may be possible to shift the vaults in the field to avoid the conflict but it is unknown if that is possible at this time; therefore, the Contractor should include in his bid costs for shifting or relocating the UGP from being in conflict with the proposed vaults.

E. Refer to label of force main from Eastside Pump Station that goes into the Junction Box upstream of the Headworks. The diameter should be labeled as “24” FM” not “20” FM”.

This should be corrected on Sheet 6 too.

F. At the Flow Control Structure, change the note that reads “±252 SY of Proposed Conc.

Access Drive” to read “±252 SY of Heavy Duty Asphalt Paving for Access Drive (see Detail Sht. 67)”.

Clarification: The proposed access drive will be heavy duty asphalt paving, not concrete.

References to “T/CONC” in the section views of Sheets 33 and 34 shall mean “Top of Asphalt” since the access drive will be heavy duty asphalt, not concrete.

G. Question: Sheet 7 shows the proposed 42” Influent and Effluent piping at the proposed Flow Control Structure, please confirm that due to the tie-in and short runs of pipe, a visual test is that will be required (no pressure test).

Answer: A visual observation is acceptable. A pressure test is not required.

H. Question: Sheet 7 shows a 4” water line North of the existing Headworks, which crosses over the two proposed 16” pipes. There appears to be a small rectangular box on the 4” line at the 16” pipe crossing, and during the site visit there appeared to be a hot box for possibly a backflow preventer. Please confirm what the existing box in that location is. If it is a backflow preventer, should it be permanently relocated, as it is unlikely it could remain in its current location during construction of the proposed 16” pipes?

Answer: The referenced box is a hot box that does contain a backflow preventer. If the backflow preventer needs to be relocated, the Owner will relocate it or we will ask the Contractor for a price to do it and it would be paid through the Supplemental Work Allowance.

3. Sheet 8.

A. Strike the following note: “Note: Proposed 16” Forcemain to EQ Basin to be Restrained

Joint w/ Conc. Blocking for the Entire length.”

B. At the Proposed EQ Basin, change the note that reads “Remove ±112 SY of Existing

Asphalt Drive & Replace with w/ Conc.” to read “Remove ±112 SY of Existing Asphalt Drive & Replace with w/ Heavy Duty Asphalt Paving (see Detail Sht. 67)”

C. At the Proposed EQ Basin, change the note that reads “±100 SY Proposed Conc. Access Drive” to read “±100 SY of Proposed Heavy Duty Asphalt Paving Access Drive (see Detail Sht. 67)”

D. Refer to the Aggregate Pier Construction Notes.