6005-Jackson Pike-Primary Sludge Holding Tank Cleaning

BIDDER GUIDE

The following information is provided by the City of Columbus to assist you in navigating the formal bid procedures. This information is not to supersede or replace any of the actual bid specifications or requirements; its sole purpose is to provide information on the process. If you have any questions regarding the process, please contact the appropriate City of Columbus representative listed on the bid solicitation (for specification questions see instructions below).

Any addenda issued by the City of Columbus will be posted on this site. The City of Columbus will send notification of addenda to Bidders that have an active login id and password with Columbus Vendor Services and are registered for the commodity code(s) associated with this solicitation.

Though the notification methods above will be utilized to notify bidders of addenda it is ultimately the Bidder’s responsibility to check this site for verification of any issued addenda.

IN ORDER FOR YOUR BID TO BE CONSIDERED:

X Pricing is to be entered into the corresponding Lines in the body of the RFQ

The following documents must be completed and attached to your response. Complete this checklist to confirm the items required in your bid. Failure to submit the listed documents may be cause for rejection of your bid. :

____ Reference Pages

____ Subcontractor Information

____ Experience Documentation

____ Literature

____ Warranty

Please refer to Page 15 of the Vendor Services User Guide for guidance using the Attachment feature to attach references, literature, warranty information and any other documentation as needed.

TABLE OF CONTENTS

Title Page

Bidder Guide

Table of Contents

Bidder's Checklist

Advertisement for Bids

Technical Specifications

Bid Forms

• Qualifications and Resource Factors

• Proposal

• Receipt of Addenda Acknowledgment

• Bid Schedule

• Proposal Signature

• Form B5 – Subcontractors

Contract

• Contract

• Contract Signature Affidavit

• Attachments

Equal Opportunity Clause

Prevailing Wages

CITY OF COLUMBUS – Columbus Water & Power

BIDDER'S CHECKLIST

DISCLAIMER - this checklist is not intended to relieve the bidder of the responsibility to provide required information. Rather, this checklist is offered merely to serve as an aid in assisting in the preparation of the bid. Notice is hereby given that the failure to submit all required information may result in the rejection of your bid on the basis that the bid is non-responsive.

Qualifications and Resource Factors/Environmental Preference

Statements and Affidavit

Proposal

Receipt of Addenda Acknowledgement/Substitutions

Bid Schedule

Proposal Signature

Contract/Attachments

Technical Specifications

ADVERTISEMENT FOR BIDS

The City of Columbus, Columbus Water and Power (CWP), is accepting bids for Primary Sludge Holding Tank Cleaning at Jackson Pike Water Reclamation Treatment Plant.

The City of Columbus, Division of Water Reclamation operates the Jackson Pike Water Reclamation Plant (WRP) at 2104 Jackson Pike Road, Columbus, OH 43223. The Primary Sludge Holding Tank (PHT) is an integral part of the solids handling system at the WRP.

This project involves work consisting of removal, cleaning, and dewatering sludge residuals captive in the Primary Sludge Holding Tank and transporting them to an approved outlet for disposal. It also includes any other such work as may be necessary to complete the contract in accordance with the plans and specifications set forth in this Invitation For Bid (IFB).

In order for a Proposal to be considered responsive, the bidder must submit all required information for the project as outlined in the IFB.

All materials submitted in response to this advertisement will become part of the awarded contract; will become the property of the City and will not be returned; and will be considered public records subject to disclosure as contemplated by Ohio Revised Code Section 149.43.

WHERE & WHEN TO SUBMIT BID

Bids will only be received electronically by the City of Columbus via Vendor Services. Bids are due November 10th, 2026 at 1:00 P.M. Eastern Time.

PRE-BID CONFERENCE

There will be a pre-bid conference held at the Jackson Pike Water Reclamation Plant on October 27th, 2026 at 11 am. Following the pre-bid conference, a tour will be given to allow Bidders to inspect the project area and facilities. Bidders are encouraged to attend and participate in the conference and walk-thru tour. Bidders are charged with knowing whatever was discussed in the pre-bid conference in preparing and submitting their bid.

CONTRACT COMPLETION

The duration of a contract for this work is expected to be one year from date of execution up to and including December 31st, 2027.

BID CANCELLATION AND REJECTIONS

The Director of Department of Public Utilities may cancel the Advertisement for Bids, reject any or all bids, waive technicalities, or hold bids for a period of 180 days after the bid opening and/or advertise for new bids, without liability to the City. During this 180 day period, the bidder agrees to hold their bid prices.

QUESTIONS

Contacting staff members directly about a bid prior to the award letters being issued can result in the disqualification of your bid.

Questions pertaining to this Invitation For Bid must be submitted by 1:00 PM, Eastern Time on October 29th, 2026, via submission through the vendor services portal. No phone calls will be accepted. Questions will be answered via an addendum issued for the bid. Typically questions are held and answered via an addendum posted approximately one week before the bid due date. The department may choose to issue multiple addendums and answer questions more frequently.

The City or its representative will not be bound by any oral interpretations which are not reduced to writing and included in addenda. Any interpretations of questions so raised, which in the opinion of the City or its representative require interpretations, will be issued by addenda and posted on the vendor services portal.

Bidders are not to contact any City personnel concerning the award of a bid prior to an award announcement being made by the City’s fiscal through the vendor services portal which is issued when an award decision is made.

APPLICABLE LAWS

The Revised Code of the State of Ohio, the Charter of the City of Columbus and all City ordinances insofar as they apply to the laws of competitive bidding, contracts and purchases and wage theft prevention, are made a part hereof.

Registering with the Ohio Secretary of State

A business entity must be registered with the Ohio Secretary of State in order to conduct business within the State of Ohio. This requirement applies to any business entity, domestic or foreign, planning to transact business within Ohio using a name other than their own personal name. Sole proprietorships and general partnerships are not required to register the business entity; however, they many need to register a trade name or report the use of a business name if they are doing business in a name not their own. (For example, if you are doing business under your personal name, i.e. Bob Smith, then you do not need to register with the Ohio Secretary of State, but if you are doing business under the name “Bob Smith’s Automotive Shop”, then the name must be registered with the Ohio Secretary of State.

Go to this website to search the list of business entities registered with the Ohio Secretary of State: https://businesssearch.ohiosos.gov/

Go to this website to register a business entity with the Ohio Secretary of State: https://www.ohiobusinesscentral.gov/

The following is a link to the Ohio Secretary of State’s Frequently Asked Questions for registering a business entity: https://www.ohiosos.gov/businesses/information-on-starting-and-maintaining-a-business/frequently-asked-questions/#:~:text=Who%20is%20required%20to%20register,documents%20to%20register%20their%20business

The City of Columbus is unable to contract with a business entity that is required to be registered with the Ohio Secretary of State and is not registered. A business entity is not required to be registered with the Ohio Secretary of State’s Office prior to submitting a bid with the City but must be registered prior to the City executing a contract.

REMEDIES

All claims, counterclaims, disputes and other matters in question between the City, its agents and employees and the Bidder, or in the event of a contract the Contractor, arising out of or relating to this agreement or its breach will be decided in a court of competent jurisdiction within the County of Franklin, State of Ohio.

SUBMISSION OF BIDS AND COSTS

All bids and other material submitted in response to this Invitation for Bid (IFB) become the property of the City of Columbus. The City may choose to retain or return these materials to the offeror, at the offeror’s expense. The City is not liable for any cost associated with the preparation of the bid or any other costs incurred by any bidder prior to the execution of the contract. The rejection of any proposal in whole or in part, at its discretion, will not render the City liable for incurring any cost or damage. The City is not liable for any costs incurred by any offeror prior to the execution of the contract.

PUBLIC RECORDS REQUESTS

The City of Columbus, as a political subdivision of the State of Ohio, is subject to Ohio Revised Code Chapter 149, known as the Ohio Public Records Law. Consequently, the Bidder understands that ALL documents submitted in response to this IFB are considered public records and WILL be released when a public records request is made by news media, competitors, or other interested parties, in accordance with the law. If Bidder contends that certain CLEARLY MARKED portions of the bid constitute an exception to Ohio’s public records law, Bidder MUST submit the legal basis in support of that assertion with the bid.

If a public records request is made for any portion of the documents submitted and Bidder has NOT clearly marked such documents as information constituting an exception to Ohio’s public records law, the information will be released immediately. DO NOT mark your entire bid as information constituting an exception to Ohio’s public records law.

If a public records request is made for such information and Bidder HAS clearly marked portions of the bid as information constituting an exception to Ohio’s public records law AND Bidder HAS submitted the legal basis supporting such claim, the City will release a redacted version of the bid to the requestor and notify Bidder a request was made and that a redacted version of the bid was released. Should the requestor indicate that the redacted version is not sufficient for their purposes, Bidder then will be IMMEDIATELY responsible for obtaining an order from a Court of competent jurisdiction in Franklin County, Ohio, enjoining release of the clearly marked information constituting an exception to Ohio’s public records law.

If a public records request is made for such information and Bidder HAS clearly marked portions of the bid as information constituting an exception to Ohio’s public records law, but Bidder HAS NOT submitted the legal basis supporting such claim, the City will notify Bidder of the request. Bidder shall respond within 5 days of the notification to tell City how it intends to respond to the request. If a response is not received from the bidder within that timeframe, City WILL RELEASE the information to the requestor.

BID REQUIREMENTS - RESPONSIVENESS AND RESPONSIBILITY PROVISIONS

The City reserves the right to reject a bid it deems non-responsive or if the bid is submitted by a Contractor deemed not responsible. Factors used to determine responsiveness and responsible are included in Columbus City Code Section 329.18, throughout the IFB and, if necessary, in its Technical Specifications.

Bid Bond

No bid bond will be required.

Contract Compliance Requirements and MBE/WBE Registration

All contractors and subcontractors who are party to a contract as defined in Columbus City Codes must hold valid contract compliance certification numbers (register with the City of Columbus) before the contract is executed. A contractor/subcontractor must also register with the City before becoming Minority or Women Business Enterprise (MBE/WBE) certified. Visit the following link to register with the City of Columbus: https://new.columbus.gov/Business-Development/Bids-Solicitations/Vendor-Resources

After vendor registration is complete, you will receive an email inviting you to complete the required Contract Compliance (EBO) Questionnaire. To complete the online registration, track the status of your application and receive a copy of your certification letter, visit: Columbus.DiversityCompliance.com

For more certification information or questions, contact us at: DiversityCertifications@columbus.gov

For additional inquiries, contact the Office of Diversity and Inclusion at: odi@columbus.gov

PREVAILING WAGE

Bidders are required to submit bids using current prevailing wage rates on Public Improvements in Franklin County and the City of Columbus, Ohio as determined by the Ohio Bureau of Employment Services, Wage and Hour Division. For information, call (614) 644-2239 or visit http://www.com.ohio.gov/dico/ .

Technical Specifications

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.01 DESCRIPTION.

The work under this contract consists of the cleaning of the Primary Sludge Holding Tank (PHT) at the Jackson Pike Water Reclamation Plant (JPWRP). Please refer to Section 02 50 00 for a detailed description of work.

1.02 WORK SITES.

The contract work shall be performed at the Jackson Pike WRP at the Primary Holding Tank (PHT).

1.03 QUALIFICATIONS

A. Bidder Requirements: The City will use the requirements of this section to determine if each bidder meets the minimum standards to be considered as a responsible bidder.

1. Experience Required: Contractor shall have a minimum of 10 years of experience as a on projects of a similar size. The Contractor’s Project Manager shall have a minimum of 10 years of experience and qualified workers shall have a minimum of 5 years of experience. The Contractor shall have sufficient and qualified manpower to effectively perform the required work within an acceptable time frame. This experience with required licenses shall be documented in the “Qualifications and Resources Factors Proposed for this Project” Section of the Proposal. The Bids of Contractors who do not supply documentation that they have this experience, adequate staffing levels and any applicable trade licenses will not be evaluated, will be considered not responsible, and will not be considered for award, regardless of their bid cost.

2. Required licenses: Contractor must have current license in the State of Ohio for the work described.

B. The Contractor shall always, while performing its duties, comply with all local, state, and federal laws and requirements.

C. Project Meetings

1. Project meetings may be held at the beginning and midpoints of the project, depending on circumstances.

1.04 DELIVERY, STORAGE AND HANDLING

A. The Contractor shall only store equipment and supplies on site, which are necessary for the completion of the project.

B. The City will not accept delivery of any equipment or materials. The Contractor must be on site to accept delivery of any such equipment or materials or the shipment will be rejected.

1.05 PROJECT/SITE CONDITIONS

A. The Jackson Pike Reclamation Plant is in continuous operations. The Contractor shall not interference with any operation whatsoever.

1.06 HOUSEKEEPING

A. At the completion of each task and at the end of each workday all debris and trash shall be removed by the Contractor. All disposals must be in accordance with applicable local, state and federal regulations.

1.07 SCHEDULING

A. The Contractor is not required to work City Holidays. All monthly maintenance and/or repairs shall be done during regular work hours, 7:00AM to 4:00PM, Monday through Friday, unless directed to do otherwise by the Project Manager or designee.

B. Due to operational requirements during wet weather months, no work shall be performed between December 1 and April 1.

1.08 WARRANTY

Not applicable.

PART 2 PRODUCTS

2.01 DESCRIPTION.

Not applicable

2.02 CHANGES IN THE WORK

A. General: Additional work beyond the maximum volume computed shall be billed on a dry ton basis excluding additional mobilization/demobilization unless justified. Please note that additional costs beyond the contracted amount must be approved by the Project Manager prior to any work performed. A Proposal (Quote) shall be submitted by the Contractor to the Project Manager within ten (10) days of the Contractor’s receipt of an RFP for such Change.

If the Change in or addition to the work will result in an increase in the Contract Sum, the City may elect to issue the RFP on a lump sum basis. The Contractor's lump sum proposal (quote) in response to the City's RFP shall be itemized and segregated by labor, materials, and equipment for various components of the Change in, or addition to, the Work (no aggregate labor total will be acceptable), and shall be accompanied by proposals of any Subcontractors who will perform any portion of the Change in, or addition to, the Work and of any persons who will furnish materials or equipment for incorporation therein. The proposal shall also include the Contractor's estimate of the time required to perform said Changes or additional work. A separate detailed summary of the scope of work for the RFP shall be submitted with each quote.

B. Labor: The labor cost is included with his/her cost per dry ton.

C. Materials. Not applicable.

D. Equipment. Not applicable.

E. Rented Equipment. Not applicable.

F. Foreman’s Transportation. Not applicable.

G. Subcontract Work. For work performed by an approved subcontractor, City will pay the approved subcontractor invoice plus up to a 5 percent markup, markup not to exceed $5,000.00.

2.03 CONTINGENCY / ALLOWANCE

A. Project Contingency/ Allowances are identified in the Proposal. The amount shall be included in the Contract Sum and shall be included in the coverage of the Proposal Guaranty (if required). During the contract, this pay item shall be utilized by the City as a resource for funding necessary changes in the Work. Project Contingency/ Allowance shall not, however, be considered a sum to which the Contractor has any entitlement, except as portions of it are assigned for payment by RFP.

PART 3 EXECUTION

3.01 DESCRIPTION.

A. The Contractor shall be responsible for the means, methods and proper use and application of all tools, equipment and materials as specified.

B. The Contractor shall be responsible for always maintaining site safety and follow all applicable federal, state, and city health and safety laws and procedures.

C. The Contractor shall restore or replace damaged structures or areas to their original condition. This includes but is not limited to roadway restoration, the PHT tank cover and hatch, conduit replacement, building repairs, sidewalk repairs, or grading and seeding of turf areas.

D. ++ END OF SECTION ++

SECTION 01 29 00 MEASUREMENT AND PAYMENT

PART 1 GENERAL

1.01 DESCRIPTION.

The Contractor shall furnish all labor, materials, supplies, tools, and equipment for the performance of all work under this Contract, in accordance with the requirements therefore given in these Contract Documents.

1.02 CONTRACT TERM.

This Contract will be in effect from date of execution up to and including December 31st, 2027. The work must be completed between April 1st, 2027 – December 1st, 2027.

1.03 PAY ITEMS

The following is the description of the content of the several Bid/Pay items in the Contract.

A. Pay Item 1 – Removal of, tank cleaning, dewatering, hauling, and disposal of material from the PHT in an environmentally responsible manner in compliance with all local, state, and federal regulations. This includes all fees, laboratory costs, and other requirements charged by the material disposal facility.

B. Pay Item 2 – Mobilization/Demobilization costs.

C. Pay Item 3 – Contingency - DOWR: This amount shall be included in the Contract Total.

The amount of Pay Item 3, being a part of the Contract Sum, shall be included in all insurance, warranty, and other applicable coverage by the Contractor.

Pay Item 3 shall not, however, be considered as a sum to which the Contractor has any entitlement, except as portions of it are assigned for payment by written order of the City directing change, and as progress is made by the Contractor upon the work under such written orders.

1.04 PRICE INCREASES.

Pricing: Bidders are requested to bid firm or fixed prices on the Proposal Pages. No increases will be considered for the full term of the contract, including renewals.

1.05 MEASUREMENT.

All quantities and amounts presented by the Contractor for payment shall accurately reflect work performed. To certify the same for payment, the City's Project Manager must be in possession of sufficient field measurements, delivery receipts, bills, etc. as are required as appropriate to document amounts due and payable.

For approved additional work, Contractor shall submit copies of invoices for all materials, parts, and equipment rentals etc. which individually exceed $100.00 in cost. The Contractor shall cooperate fully with City representatives in all matters regarding such documentation pursuant to certification, and shall furnish measurements, true copies of documents, attestations, etc., all as may be required for these purposes, at no increase in contract price.

1.06 TAXES

Federal or State taxes are not to be included on invoices for any items incorporated into the work. Contractor will be provided an exemption certificate, if applicable.

1.06 APPLICATION FOR PAYMENT.

A. The Contractor shall invoice the City for services rendered under this contract no more than once per month during the performance of the work. The City desires to promptly pay the Contractor for acceptable work performed and shall endeavor to process all invoices without delay. For this goal to be achieved, the Contractor must provide assistance with measurements and verification and shall present legible invoices in a form and degree of detail sufficient for City processing.

B. The City will not be subject to any late payment charges and as such will not make payment on charges if included on an invoice.

C. The City's Standard Invoice Format for contracts of this type is given on the following pages and represents the minimum level of detail which is required. The Contractor shall be prepared to furnish invoices which include all items given on this format; if the Contractor uses a standard invoice of its own, it shall be "customized" as necessary to provide all the information, and the organization thereof, given on the City's Standard Invoice Format. The City's Project

D. With each invoice, the Contractor shall provide a completed ASSURANCES section. The ASSURANCES section of the invoice contains five matters, for all of which the City desires a specific attestation by a responsible party from the Contractor’s firm. If one individual can furnish assurance, as responsible party, that all matters are as stated in the invoice, only one signature is required at the end of the ASSURANCES. If, however, no one person can make all ASSURANCES of their own personal knowledge, additional attestation signature(s) may be provided by other responsible parties, as necessary and appropriate.

E. If a subcontractor performs work included on an invoice, the Contractor shall complete and submit with his invoice an EBOCO Subcontractor Reporting Form. See instructions for EBOCO Subcontractor Reporting Form, on the following pages.

F. Records of application for payment, actual payments and any other record pertaining to this contract are public records. Accordingly, the City may, upon written request, furnish to any Subcontractor, or any other person, regarding the percentages of completion, the amounts applied for by the Contractor and the action taken thereon by the City.

G. The City shall not have any obligation to pay or to see to the payment of any Subcontractors except as otherwise required by law.

H. The Contractor agrees to keep the Work and the site free and clear of all liens permitted by law related to the labor and materials furnished in connection with the Work. If any lien is filed at any time during the progress of the Work or within the duration of the Contract, the City may refuse to make any payment otherwise due the Contractor or may withhold from any payment otherwise due the Contractor a sum sufficient to pay all obligations and expenses necessary to satisfy such lien. If the Contractor fails to furnish record that the lien has been satisfied, discharged and released of record within ten (10) days after demand by the City, the City may discharge such indebtedness and deduct the amount, together with any and all losses, costs, damages and attorney’s fees, from any sum payable to the Contractor.

1.07 PAYMENTS WITHHELD

A. Applications for payment may, at any time, be withheld, in whole or in part, to the extent necessary to protect the City, for the following reasons:

1. Defective work is not corrected.

2. Third party claims filed or reasonable evidence indicating probable filing of such claims.

3. Failure of Contractor to make payments properly to Subcontractors or for labor, materials, or equipment.

4. Reasonable evidence that the Work cannot be completed for the unpaid balance of the Contract Sum or within the Contract time.

5. Failure or refusal of the Contractor to carry out the Work in accordance with the Contract Documents.

6. Failure to comply with state or federal regulations.

7. Failure to comply with reporting requirements for subcontractors.

1.08 SUBCONTRACTORS

A. The Contractor must perform Work amounting to not less than 50 percent of the Contract Sum with its own organization, unless otherwise approved by the Director or the Contracting Officer.

1.09 UTILIZATION OF SUBCONTRACTORS

All work required in this contract shall be performed by the Contractor, via the efforts of the Contractor’s employees and subcontractors, and shall conform to the following:

A. EQUAL OPPORTUNITY CLAUSE of the Contract.

B. Persons performing work on this contract and claimed by the Contractor to be employees of the Contractor shall in all respects conform to the requirements for the status of “employee” under the Fair Labor Standards Act, the regulations of the Internal Revenue Service, and the rules and regulations of the Social Security Administration, rather than conforming to the requirements for subcontractors by any or all such agencies.

C. The Contractor shall pay FICA taxes, pay Worker’s Compensation Insurance, make appropriate payroll deductions, and take all other such actions required of the Contractor by law for genuine employees, in order both to conform to law and to avoid placing the City at hazard in any related legal action.

D. Persons performing work who are not employees of the Contractor are legally Subcontractors, and all the City’s requirements for Subcontractors shall be met; these requirements include:

1. A list of Subcontractors expected to be utilized in the Work shall be submitted to the City for review prior to the execution of the contract. This listing may be changed thereafter; however, each change shall require prior written notice to the City before the changed Subcontractors begin work.

2. No Subcontractor who does not have a City of Columbus Contract Compliance Number shall be employed upon the Work at any time.

3. Violation of 1. and/or 2., above may subject the Contractor to deduction of payments otherwise due, to sanctions, or to any other action deemed appropriate under Title 39, Columbus City Codes, 1959.

1.10 CONTRACTOR AS AN INDEPENDENT CONTRACTOR.

A. In the performance of the work under these specifications, the relationship of the Contractor to the DPU will be that of an independent contractor. It is intended that the work performed under these specifications be supplemental to the DPU employee workforce and/or other labor force used by the DPU under separate contract.

B. The Contractor shall be and shall remain an Independent Contractor with respect to all services performed hereunder and he/she/it agrees to and does hereby accept full and exclusive liability for the payment of any and all contributions or taxes for Social Security, unemployment insurance or old age retirement benefits, pensions or annuities now or hereafter imposed under any state or federal law which are measured by the wages, salaries or other remunerations paid to the Contractor or persons employed by the Contractor for work performed under the terms of this Agreement and further agrees to obey all lawful rules and regulations and to meet all lawful requirements which are now, or hereafter may be, issued or promulgated under said respective laws.

1.11 SAMPLE INVOICE

STANDARD INVOICE FORMAT FOR

MAINTENANCE CONTRACTS

CITY OF COLUMBUS, COLUMBUS WATER & POWER

DIVISION OF WATER RECLAMATION

TREATMENT ENGINEERING

VERSION 1.5 REVISION DATE: 2/22/22

[Page 1 to be on Contractor’s Company Letterhead Include Contractor’s remittance address]

INVOICE TRANSMITTAL

[1]

Division of Water Reclamation Treatment Engineering, Room 20 1250 Fairwood Ave

Columbus OH 43206

Attn: XXXXX, Treatment Engineering

Subject: Invoice No. [2] Contract JPWRP Primary Sludge Holding Tank Cleaning

Project No.: 0101.7

CCCN [3]

Contractor’s Project No. [4] Contractor’s Invoice No. [4] Invoice for Services for Period:

through [5] Net Amount Due On This Invoice: $ [6] File No.: 0101.7-38

Dear XXXXX:

Forwarded herewith, for review and processing, is the original of the subject invoice.

Very truly yours,

[7]

xc: Contractor’s File

(i) INVOICE SUMMARY INVOICE NO. [2]

1. Contract Amount:
Total Contract Amount Authorized to Date:	$ . [10]
2. Total of Prior Invoices:	$ . [6][14]
3. Amount Due On This Invoice: (From Invoice Detail Pages)	$ . [6]
4. Payment Summary:
A. Total Invoiced To Date (2. + 3.):	$ . [6]
B. Less Total of Prior Invoices (2.):	$◊ . ◊[6]
C. = Net Total Due On This Invoice (4.A. - 4.B.):	$ . [11]
5. Remaining Balance: (1.- 4.A.):	$ . [6]

ASSURANCES

Invoice No.

I, the undersigned, hereby attest to the following regarding this Invoice:

1. Duplicate Billing. The Net Amount Due on This Invoice in no way represents any duplication of other billings to the City.

2. Subcontracting. All amounts billed hereon for the services and expenses of subcontractors, are only for the services and expenses of subcontractors whose employment upon this work has been granted specific, prior approval, in writing, by the City’s Office of Diversity and Inclusion.

3. Payment to Subcontractors and Major Suppliers. All amounts previously billed to the City on this contract for the services of subcontractors and major suppliers, and which have been paid by the City, have in turn been paid to those subcontractors and suppliers within ten calendar days of our firm’s receipt of payment from the City. If any amounts are in dispute between our firm and such subcontractors and suppliers, the City has been notified of such dispute and its details, in writing.

4. Legitimacy Statement. All costs for which billing is made on this invoice have been incurred in furtherance of the work of this contract, and all such costs conform to the provisions of the contract. No costs for avoidable sales tax or other ineligible charges are included in the invoice.

5. Accuracy Statement. This invoice has been carefully prepared and checked for mathematical accuracy. All materials presented as part of the invoice have also been checked for legibility and numbering.

By:

Date

All of the above ASSURANCES made and subscribed before me this

day of , .

Notary Public

My Commission expires , .

+ + END OF SECTION + +

SECTION 02 50 00

Cleaning and DEWATERING residuals

from primary sludge holding tank

PART 1 – GENERAL

1.01 DESCRIPTION OF WORK

A. Introduction

The City of Columbus, Division of Water and Power operate the Jackson Pike Water Reclamation Plant (WRP) at 2104 Jackson Pike Road, Columbus, OH 43223. The Primary Sludge Holding Tank (PHT) is an integral part of the solids handling system at the WRP.

Tank Description

The Primary Sludge Holding Tank (PHT) is a circular buried concrete tank with an aluminum geodesic dome cover. Dimensions are approximately 70-foot diameter, 24-foot side water depth, and a bottom cone with a 4-foot depth and an approximate volume of 38,400 gallons. Sludge volume in straight wall portion of the tank is approximately 28,800 gallons per vertical foot of tank wall, excluding cone volume. Please see attached schematic diagraphs for general layout of internal piping.

The bottom of the tank is cone shaped with a 4-foot depth in the center. The PHT has a multi-port mixing system to homogenize the two sludge streams prior to seconding flows to the anaerobic digestion process. Piping associated with the mixing system is affixed to the bottom of the cone.

Three equally spaced hatches in the dome afford access and the tank for inspection and cleaning. The PHT is adjacent to non-potable water, process and storm drain lines, and an electrical power source. The approximate dimensions of each hatch are 3-foot x 3 foot.

The tank is located out of doors and is accessible by driveway. Electrical, non-potable water, and drainage are available for a contractor’s use.

Photographs of the PHT and adjacent area are provided at the end of this section. Photographs show the tank, driveway staging area, and locations for drainage, non-potable water and electrical power.

Normal PHT Operations

The PHT is designed to hold separate thickened primary sludge. However, operations personnel also use the PHT for thickened Waste Activated Sludge to create a mixed blend of sludges for feed to anaerobic digestion. The concentration of primary sludge to the PHT is approximately 5.0% and the concentration of thickened waste activated sludge is approximately 6.0%.

The Adjacent Waste Holding Tank was originally designed to store thickened waste activated sludge (TWS), but it can also store thickened primary sludge (TPS). Piping and valving allow one tank at a time to be isolated. At the present time, the PHT is not in service.

The PHT has not been cleaned in several years. Operations personnel can drain down the tank of most of its contents. Remaining material consists of heavy encrusted grease, laden with grit and thick primary sludge. Operations personnel have the capability to remove material to a point 4 foot up the sidewall of the tank, excluding the volume of the cone bottom. Given the nature of the material, operations personnel estimate the in-situ concentration of materials presently in the PHT is approximately 10%, although this has not been confirmed.

B. Purpose

The City of Columbus, Division of Water and Power (CWP) are soliciting competitive quotations to remove and dispose of sludge contents from the existing PHT as a preventive maintenance task to allow it to function as designed and provide adequate storage to primary sludge removed from the primary sedimentation process.

C. Material Description

Operations personnel report that material in the PHT consists of heavy encrusted grease, laden with grit and thick primary sludge. Given that this material has not been stabilized, it is considered by the Ohio EPA to be unclassified waste.

Operations personnel have the capability to remove material to a point 4 feet up the sidewall of the tank from the end of the cone section, excluding the volume of the cone bottom. Given the nature of the material, operations personnel estimate the in-situ concentration of materials presently in the PHT is approximately 10%, although this has not been confirmed.

An estimate of the solids volume is computed as follows:

Cone Volume: 38,400 gallons

Side Walls: 28,800 gallons/Vertical Foot x 4 feet = 115,200 gallons

Estimated Total 153,600 gallons

An estimate of the solids mass is as follows:

Mass = 0.1536 MG x 100,000 mg/l x 8.34 / 2,000 lbs.//Dry Ton = 64.05 Dry Tons

Please be advised that the values and calculation presented above are based on an estimate by the City. Prospective bidders are encouraged to attend a pre-bid inspection meeting and perform their own measurements.

Payment shall be based on dry tons.

C. General Description of Work Required

At a minimum, the Contractor shall provide the following:

1. Dewatering equipment to dewater solids to a minimum of 21%.

2. All polymer and chemicals required to dewater the material

3. All pumps, fuel, hoses, couplers, tools, and accessories to remove and dewater the PHT material.

4. All prevailing wage labor to complete the project.

5. All analytical testing required for the disposal site and to determine dry tons hauled.

6. All transportation to and from the approved outlet location.

7. A telehandler to support pumps in to avoid damaging the PHT cover or hatch.

8. A sludge pumping system capable of removing sludge materials from the PHT that will provide effective and complete removal of material.

9. Pressure cleaning of the inside of the tank, which was in contact with removed material, to remove residual material.

10. All required site clean up, and restoration as required.

11. All mobilization, demobilization and cleaning of the work area not mentioned above.

12. Manifests and approval paperwork from the approved outlet authority.

D. Pre-Bid Meeting

Interested bidders are encouraged to attend a pre-bid meeting.

1.02 SUBMITTALS

A. The Contractor shall provide a detailed narrative on the anticipated means, methods, and equipment proposed to complete the project as described above prior to mobilizing on site.

B. The Contractor shall provide all information required by the material disposal outlet including testing, certifications and facility specific requirements.

PART 2 - EQUIPMENT

2.01 provide a Complete and functional System

This is a service contract. No equipment is to be purchased by the City.

The following general principles shall apply:

A. The Contractor has the flexibility to select and provide all equipment necessary to perform the project without reliance on City in a safe, efficient, and environmentally compliant manner.

B. There is no equipment to be purchased by the City.

PART 3 - EXECUTION

3.01 Workflow requirements

A. There is no area on site for temporary storage of dewatered material prior to hauling. Once the dewatering process is initiated, and a truck is filled, it must be hauled to the disposal site.

B. The Contractor is required to complete his/her work prior to December 1st, 2027.

C. Normal working hours are 7:00 AM to 4:00 PM.

D. The Jackson Pike Water Reclamation Plant must be maintained in continuous operation and cannot be bypassed or taken out of service. Federal regulations prohibit bypassing any sewage during service or repair operations. The Contractor will be responsible for providing any required temporary pumping facilities, piping, etc., necessary to complete the Work without any plant by-passing and continuous treatment must be provided at the same level during construction as existed prior to the construction.

E. Filtrate from the sludge dewatering operation is to be directed into the plant drain system. No discharge is to be made into the storm sewer, ditch, or river which may constitute a violation of the Clean Water Act and its Amendments.

F. The Contractor shall maintain and clean up spilled materials from the project during and after project completion. The Contractor shall install dandy bags or other protection devices around the adjacent storm drain grating to impede wash water from entering it.

Photographs

Photographs of the PHT and adjacent area are provided on the following pages.

Primary Holding Tank (PHT) also called Raw Holding Tank.

PHT Hatch (typical of 3)

Staging Area Next to PHT with Electrical Building at Back of Photo

Recycle Stream Drain Line at Manhole and Storm Drain in Green

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