Inspection_and_Cleaning_of_Deep_Injection_Stormwater_Drainwell_Systems_(Addendum_#2_Revision).pdf

Mayor Chief Procurement Officer Buddy Dyer David Billingsley, CPSM, C.P.M.

INVITATION FOR BID (IFB)

IFB24-0485

INSPECTION AND CLEANING OF DEEP INJECTION STORMWATER

DRAINWELL SYSTEMS

The City of Orlando Procurement and Contracts Division has implemented an electronic bidding system to streamline solicitation responses.

CITY OF ORLANDO PROCUREMENT AND CONTRACTS SITE

https://www.orlando.gov/Our-Government/Departments-Offices/OBFS/Procurement

City of Orlando

INVITATION FOR BID (IFB)

IFB24-0485

INSPECTION AND CLEANING OF DEEP INJECTION STORMWATER

DRAINWELL SYSTEMS

TABLE OF CONTENTS

1. INTRODUCTION

2. GENERAL INFORMATION

3. SUBMITTALS

4. SCOPE OF WORK

5. STANDARD TERMS AND CONDITIONS

6. SPECIAL TERMS AND CONDITIONS

7. ELECTRONIC PRICING FORM(S) INSTRUCTIONS

8. VIRTUAL OPENING

9. VENDOR QUESTIONNAIRE

Attachments:

A - Exhibit 1 - Drainwell Inspection Form

Inspection and Cleaning of Deep Injection Stormwater Drainwell Systems

1. INTRODUCTION

1.1. Summary

The City of Orlando (referred to as “City”) seeks to establish a service Contract with a qualified company to provide inspection and cleaning of City-owned deep injection stormwater drainwell systems in accordance with the terms, conditions, and specifications contained in this Invitation for Bid (IFB).

1.2. Contact Information

Direct all questions and inquiries to the following:

Cindy Jordan, C.P.M.

Purchasing Agent III

400 South Orange Ave

Orlando, FL 32801

Email: cynthia.jordan@orlando.gov

Phone: (407) 246-2367

Department:

Streets and Stormwater

1.3. Timeline

Issue Date September 6, 2024 mailto:cynthia.jordan@orlando.gov tel:(407)246-2367

Pre-Bid Conference (Non-

Mandatory)

September 23, 2024, 10:30am

JOIN THE VIRTUAL PRE-BID

CONFERENCE

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Find a local number

Phone conference ID: 529 834 105#

Join on a video conferencing device

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Video ID: 117 950 822 0

Cut-off date for Questions by

Bidder

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Bid Due Date and Time October 10, 2024, 2:00pm

JOIN THE VIRTUAL BID OPENING

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Dial in by phone

+1 321-247-7568,,79338650# United

States, Orlando

Find a local number

Phone conference ID: 793 386 50#

Join on a video conferencing device

Tenant key: cityoforlando@m.webex.com

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2. GENERAL INFORMATION

2.1. SOLICITATION INFORMATION

The City’s Procurement and Contracts Division is the official source to obtain information relating to City of Orlando procurements. It is incumbent on the Respondent to obtain current response/submittal and award information prior to and after the scheduled opening date of a solicitation. Information is updated as it becomes available. An award, or recommendation of award, may be made at any time after the scheduled opening date of a solicitation. You may obtain award and other solicitation information in a variety of ways, such as:

• Solicitation documents are available for download from the City's e-Procurement

Portal ("Portal"):

You may access solicitation information by visiting the City’s Portal by clicking on the following link: https://procurement.opengov.com/portal/orlando

• You may also contact the Procurement and Contracts Division at (407) 246-2291 or visit us during normal business hours, to obtain award information and other documents at:

City of Orlando

Procurement and Contracts Division

400 South Orange Avenue, Fourth Floor

Orlando, Florida 32801

Please remember, email notification is provided as a courtesy to our Respondents, but it is the Respondent's responsibility to check with the City of Orlando’s Portal at:

https://procurement.opengov.com/portal/orlando for current solicitations and other procurement information.

We appreciate your interest in doing business with the City of Orlando.

2.2. CONTRACT TERM

It is the intent of the City to award a Contract for a three (3) year term to begin upon approval and execution by the City. The Contract may, by mutual assent of the parties, be renewed for two (2) additional twelve (12) month periods or portions thereof, up to a cumulative total of sixty (60) months.

2.3. SCHEDULE

The Timeline Section of this solicitation contains the scheduled calendar of events with important dates and times for this Solicitation. Dates and times are subject to change by the City’s Chief Procurement Officer (CPO) or designee, at their sole discretion. If the

Procurement and Contracts Division determines that it is necessary to change these https://procurement.opengov.com/portal/orlando https://procurement.opengov.com/portal/orlando dates or times prior to the Solicitation Due Date, the change will be announced via an addendum.

2.4. PRE-SOLICITATION CONFERENCE

The purpose of a Pre-Solicitation Conference is to review and discuss the solicitation (and any addenda) as published. A representative from the Procurement and Contracts

Division and a technical representative from the using department will be present to discuss the solicitation.

3. SUBMITTALS

Respondents are solely responsible for ensuring that their submittals are complete, uploaded and submitted in the e-procurement Portal by the Due Date and time. The City shall not be responsible for any submission delays or failures caused by any occurrence. Respondents are expected to examine this solicitation, specifications, associated drawings, if any, and all instructions. Failure to do so will be at the

Respondent's risk.

Each Respondent shall furnish the information required on each response/submittal form and each accompanying sheet thereof on which an entry is made.

The following items must be completed and uploaded as part of your electronic submittal and are contained in the Vendor Questionnaire Section. Failure to complete and return required forms may result in your bid being deemed non-responsive and not considered for award.

A. Pricing - All prices shall be entered online through the City's e-Procurement portal.

B. Attachment A - References. This form must be downloaded, completed, and uploaded as a part of the submittal.

C. Attachment B -Respondent's Certification Form. This form must be downloaded, completed, signed, notarized, and uploaded as a part of the submittal.

D. Attachment C - Contract and Acceptance Form. This form must be downloaded, completed, signed, notarized, and uploaded as a part of the submittal.

E. Attachment D - Conflict of Interest Disclosure Form. This form must be downloaded, completed, signed, and uploaded as a part of the submittal.

F. Attachment E - Confidential and/or Proprietary Information Exemption Form.

This form must be downloaded, completed, signed, scanned, and uploaded as a part of the submittal.

G. Attachment F - Minority/Women-Owned Business Enterprise Participation Form.

This form must be downloaded, completed, and uploaded as a part of the submittal.

H. Attachment G - Veteran Business Enterprise Participation Form. This form must be downloaded, completed, and uploaded as a part of the submittal.

I. Copy of Respondent's current W-9 is to be signed and uploaded as a part of the submittal.

J. Bid Security, if applicable.

K. Proof of insurance - If applicable, please refer to Section 5 – Insurance

Requirements

Respondents shall register on the City’s e-Procurement Portal. Once registered, Respondents may view and click "Follow" to be a Prospective Respondent for this solicitation and will appear on the Follower’s list. Respondents that fail to Follow this project will not receive automated Addenda notifications, nor will they be able to submit a response in the Portal, and therefore will be unable to participate, nor be considered for this solicitation. Respondents must click “Draft Response” to properly begin and submit a response in the Portal.

The City will accept responses to this solicitation electronically via the e-Procurement

Portal until 2:00 PM on Thursday, October 10, 2024. Responses received after the scheduled due date and time for submission will not be accepted. Responses submitted in any other format other than via the City's e-Procurement Portal, including but not limited to, hard copy (mailed or hand delivered), facsimile, or emailed submittals, will not be accepted, nor considered. The scheduled due date and time for submission will be scrupulously observed.

Neither the City, nor the Software Administrator will be held responsible for untimely submissions due to personal or company internet or hardware limitations, settings or restrictions, internet speed, power outage, network connection, use of a malfunctioning electronic device, or the like. Respondents shall be solely responsible for ensuring the capability of their computer system while responding to this solicitation, and for the stability of their internet service. Uploading large documents may take significant time depending on the size of the file(s) and the Internet connection speed that the

Respondent is using to submit a response. Failure of the Respondent to successfully submit an electronic response before the deadline indicated herein shall be at the

Respondent’s sole risk, and no relief will be given for late and/or improperly submitted response. Once file(s) have been uploaded and the Submission Status shows as

“Submitted” the submission is complete. At that point, the Respondent will also receive an email confirmation from the Portal.

Respondents may withdraw their submittal electronically via the Portal at any time prior to the scheduled due date and time for submission.

4. SCOPE OF WORK

4.1. INTRODUCTION

The City of Orlando (referred to as “City”) seeks to establish a service Contract with a qualified company to provide inspection and cleaning of City-owned deep injection stormwater drainwell systems in accordance with the terms, conditions, and specifications contained in this Invitation for Bid (IFB).

4.2. BACKGROUND

A drainwell is an open casing that has been set into a geologically competent layer to allow for surface runoff and lake water to freely flow into the subsurface. This contract covers the maintenance of the City’s drainwells and associated structures that provide rapid removal of stormwater from roadways and lakes to reduce the level and frequency of flooding.

This contract includes locating, inspecting, assessing, cleaning, repairing, and abandoning deep injection stormwater drainwells (EPA Class V drainwell) throughout the

City of Orlando; that may include, but is not limited to, intake structures, piping, vents, and other associated structures collectively termed drainwell systems.

4.3. QUALIFICATIONS

The Bidder shall meet the following Minimum Requirements as outlined below. Include the requested documents with your bid response. Additional documents may be attached, as needed, to outline that you have met these requirements.

Minimum Requirements

A. The Bidder shall be actively in business and have a minimum of five (5) years’ experience of performing the means and methods of locating, inspecting, assessing, cleaning, repairing, and abandoning deep injection stormwater drainwell systems as described in this solicitation. Bidder should provide verifiable References under

Attachment A.

B. The Bidder shall be licensed and certified by the State of Florida Department of

Business and Professional Regulation (DBPR) by the Construction Industry Licensing

Board for Underground Utility and Excavation. Include a copy of said license with your bid response.

https://www.myfloridalicense.com/intentions2.asp?chBoard=true&SID=&boardid= 06&professionid=0610

C. The Bidder shall provide documentation that shows proof of your business office physical address:

1. Include your business physical office address on Attachment A (References).

https://www.myfloridalicense.com/intentions2.asp?chBoard=true&SID=&boardid=06&professionid=0610 https://www.myfloridalicense.com/intentions2.asp?chBoard=true&SID=&boardid=06&professionid=0610

2. Include a copy of your firm’s Business Tax Receipt that shows you work in the

State of Florida and include with your bid response. Include a copy of Business

Tax Receipt with your bid response.

4.4. ADDITIONAL SUBMITTALS

A. Personnel List – Bidder to provide a list of personnel assigned to perform the majority of the Work. Provide the personnel’s name, job title and years' of experience on

Attachment H (Personnel List) and include with your bid response.

B. Equipment and Vehicle List – Bidder shall have vehicles and equipment to self-perform the majority of the Work. Vehicles shall be registered in the State of Florida and are able to safely operate on roadways and job sites. Bidder shall lease or own said equipment to perform the Work as outlined herein. If pumps are needed in close proximity to residences, diesel engines with quiet pack systems or electric motors installed in an enclosed shelter shall be utilized to keep noise to an absolute minimum (per Chapter 42 of the City code). All equipment used in the performance of these services shall be properly maintained and shall be subject to inspection by the City upon demand. Any equipment deemed faulty, inoperable, unsafe, or improper for its intended purpose shall be promptly removed from the City’s premises. Provide proof of the possession of vehicles and equipment on Attachment I (Equipment and Vehicle List) and include with your bid response. Additional documentation may include photos, descriptions, proof of ownership and/or leasing agreements.

C. Safety Training Certifications – Bidder shall provide any safety training certifications that your personnel have completed that is pertinent to the applicable Work. The main certifications that should be included in your bid response are:

1. OSHA confined space certification

2. OSHA 10 certification

4.5. DEFINITIONS, REGULATIONS, AND REFERENCE GUIDES

ASME = American Society of Mechanical Engineers http://www.asme.org

ASTM = American Society for Testing and Materials https://www.ASTM.org cf= cubic feet cfm = cubic feet per minute http://www.asme.org/ https://www.astm.org/

CFR = Code of Federal Regulations https://www.govinfo.gov/app/collection/cfr

DBPR = Department of Business and Professional Regulation Bureau (DBPR) https://www.myfloridalicense.com/intentions2.asp?SID=

EPA = Environmental Protection Agency https://www.epa.gov/

ESM = Engineering Science and Mechanics https://www.esm.psu.edu/

FDEP = Florida Department of Environmental Protection https://floridadep.gov/

FDOT = Florida Department of Transportation https://www.fdot.gov/ gpm = gallons per minute

GPR = Ground-Penetrating Radar

GPS = Global Positioning System

ID = Identification

MOT = Maintenance of Traffic https://www.govinfo.gov/app/collection/cfr https://www.myfloridalicense.com/intentions2.asp?SID= https://www.epa.gov/ https://www.esm.psu.edu/assets/docs/handbooks/undergraduate-handbook.pdf https://floridadep.gov/ https://www.fdot.gov/programmanagement/specs.shtm https://www.fdot.gov/construction/engineers/mot/motmain.shtm

NIOSH = National Institute for Occupational Safety and Health https://www.cdc.gov/niosh/index.html

NPDES = National Pollutant Discharge Elimination System https://www.epa.gov/npdes

NTU = Nephelometric Turbidity Unit

OSHA = Occupational Safety and Health Administration http://www.osha.gov/

PPE - Personal Protection Equipment psi = pounds per inch

SPs = Superplasticizer

WMD = Water Management Districts https://floridadep.gov/water-policy/water-policy/content/water-management-districts

City Codes:

Chapter 31 – Stormwater Utility Code https://library.municode.com/fl/orlando/codes/code_of_ordinances?nodeId=TITIICICO_

CH31STUTCO

Chapter 42 – Noise https://www.fdot.gov/construction/engineers/mot/motmain.shtm https://www.cdc.gov/niosh/index.html https://www.epa.gov/npdes http://www.osha.gov/ https://floridadep.gov/water-policy/water-policy/content/water-management-districts https://library.municode.com/fl/orlando/codes/code_of_ordinances?nodeId=TITIICICO_CH31STUTCO https://library.municode.com/fl/orlando/codes/code_of_ordinances?nodeId=TITIICICO_CH31STUTCO https://library.municode.com/fl/orlando/codes/code_of_ordinances?nodeId=TITIICICO_

CH42NO

4.6. GENERAL REQUIREMENTS

This contract is for locating, inspecting, assessing, cleaning, repairing, and abandoning deep injection stormwater drainwells (EPA Class V); that may include, but is not limited to, intake structures, piping, vents, and other associated structures collectively termed drainwell systems. Additional activities may include video inspection and recording;

geophysical logging; preparing written assessment reports; drainage well and/or system cleaning and repairing; step-drawdown testing; load testing; and soil stabilization.

The Contractor shall furnish all labor, materials, equipment, supplies and tools, as well as furnish all supervision, workforce, quality control, transportation, tolls, sampling, and disposal fees (unless otherwise specified) necessary to complete the Work as specified herein.

A. Work Hours

Work is typically scheduled during normal business hours, unless otherwise instructed by the City’s Project Manager. Normal business hours are defined as 7:00 a.m. to 4:00 p.m.

local time, City of Orlando, Monday through Friday, excluding City recognized holidays*.

All Work shall be approved by the City's Project Manager prior to implementation.

*The City recognized holidays are New Year’s Day, Martin Luther King Day, Memorial

Day, June 19th, 4th of July, Labor Day, Thanksgiving Day, Day after Thanksgiving, Christmas Eve, and Christmas Day.

Work on weekends (Saturdays and Sundays) may be permitted if pre-approved by the

City’s Project Manager. No Work will be performed on holidays. If night Work is required for areas with high traffic during the days or at sites with other limitations, the Work shall be scheduled between 7:00 p.m. and 11 p.m. If weekend or night activities are required, a differential equaling twenty percent (20%) will be applied to all services rendered during these events. A differential fee will not be applied to overtime rates.

B. Contractor Responsibilities

The responsible party(ies) shall hold their position(s) either as an owner and/or principal in the firm, a project manager, or a contract manager. Personnel assigned to this contract shall perform the majority of the Work awarded under the Contract resulting from this solicitation.

The personnel who perform these services shall be under the sole responsibility of the

Contractor. The Contractor’s personnel shall be skilled and knowledgeable in the field of drainwell inspections, construction, design, cleaning, and functionality to allow for the https://library.municode.com/fl/orlando/codes/code_of_ordinances?nodeId=TITIICICO_CH42NO https://library.municode.com/fl/orlando/codes/code_of_ordinances?nodeId=TITIICICO_CH42NO determination of maintenance requirements. The City’s Project Manager shall be notified of any changes in replacement personnel.

The Contractor is responsible for moving and transferring their crew to accommodate multiple Work assignments or in the event of project changes.

The Contractor’s employees assigned to complete the Work shall conduct themselves in a professional manner. Any Contractor employee deemed by the City to be incompetent in the performance of Work under the Contract, discourteous, or otherwise objectionable may be removed from the assigned Work.

The Contractor’s employees shall not smoke on property. The Contractor’s employees shall not bring any individuals with them on premises not employed by the Contractor.

The Contractor shall provide a contact list of personnel with email addresses, cellular phones, pagers, or other communication type devices to communicate with the City’s

Project Manager.

The Contractor shall designate a single point of contact with whom the City’s Project

Manager may consult regarding Work assignments, status updates, completion of assignments, and other related matters.

The Contractor’s employees shall report to the City’s Project Manager any hazardous conditions or items in need of repair noted during the performance of the Work.

The Contractor shall, in addition to all other guarantees, be responsible for faulty labor or workmanship and shall promptly correct improper Work within fifteen (15) days from notification, without cost to the City, within a reasonable period after receipt of notification of such faulty labor or workmanship. Payments in full or otherwise do not constitute a waiver of this guarantee. The guarantee period shall be effective for one (1) year after acceptance of the Work by the City.

C. Items Furnished by the City

The City shall provide the following items pertaining to the Work specified in each Work

Order, if required:

1. Suitable access to work sites.

2. City of Orlando Engineering permits

3. Necessary Local permits (except those required as part of the Contractor’s operations).

4.7. SCHEDULE

The Contractor will be contacted by a City's Project Manager regarding Work to be performed. A site visit with the City's Project Manager may be scheduled prior to submission of cost proposal, if needed. A cost proposal is anticipated to be submitted within five (5) business days of the request from the City's Project Manager. Upon receipt of the cost proposal, the City's Project Manager will review the information and then, may approve or ask the Contractor for additional information.

4.8. RESPONSE TIME

The Contractor shall start Work within five (5) business days after receiving written authorization, which will include the location, anticipated duration, scope of work, and thereafter complete the Work within the time specified in the authorization.

The Contractor acknowledges that time is of the essence to complete the Work as specified in every approved Work Order. The Contractor agrees that all Work shall be performed regularly, diligently, and uninterrupted at such a rate of progress as will ensure full completion thereof within the time specified in every Work Order. The Contractor will have the appropriate number of personnel available for the length of the project as needed to expeditiously and diligently complete the Work.

4.9. DRAINWELL MAINTENANCE TECHNICAL REQUIREMENTS

The material and equipment used in locating, inspecting, assessing, cleaning, repairing, and abandoning drainwell systems, video inspections, geophysical logging, step-drawdown testing, and soil stabilization, shall be the product of a manufacturer who is experienced, reputable and qualified in the process of pipe rehabilitation.

A. Drainwell System Inspection

The Contractor shall perform inspections and assessments of various drainwell systems utilized for stormwater management within the City of Orlando. The Contractor will be responsible for all aspects of the Work to include but not limited to MOT, vehicles, supplies, equipment, water supply, and materials.

The City’s drainwells range from approximately one-hundred (100) ft deep to just over one-thousand (1,000) feet deep and may include various structures. The Contractor shall physically inspect the interior of the manholes, well boxes, vaults, pipes, or any other infrastructure related/attached to the drainwell. The Contractor shall prepare a comprehensive report with an assessment of the drainwell system to include, but not be limited, to the deficiencies found, current condition of facility and recommendations for corrections of any deficiencies found. A copy of the City Drainwell Inspection Report

(refer to Exhibit 1) that includes all the required information that needs to be provided in the report will be included in each job assignment. The Contractor may utilize their own report, if a) pre-approved by the City’s Project Manager and b) outlines the same information as the City's Inspection Report. Contractor shall be submit either form within seven (7) business days of the inspection to the City's Project Manager.

B. Video Inspections

The Contractor shall inspect the drainwell(s) with a video recording device that can record the entire depth of the drilled well utilizing a color video camera with three-hundred and sixty (360) degree direction side viewing capability. When possible, the drainwell shall be flushed during the video to ensure the best clarity. The camera shall be equipped with a light to ensure visibility. The City’s Project Manager shall be notified of all deficiencies identified within the drainwell casing in an inspection report to help determine the method of corrective action. All video inspection reports shall include adequate information to easily identify the location of the well (well ID, street address and/or street intersection, and GPS coordinates (if available).

An inspection report shall also be submitted with the video that documents the year the well was constructed, the original static water level (if known), the original casing depth

(if known), the original total drilled depth (if known), the current depth to the static water level, the current depth to the bottom of the casing, and the current depth to the bottom of the drilled well as well as the depths to and a description of any discovered deficiencies.

Drainwell water and casing depth measurements shall be collected from the top of the manhole or ground surface. A copy of the drainwell video on a portable external drive device, thumb drive, share drive, or other digital device shall be provided to the City’s

Project Manager along with the written inspection report in a PDF format. Refer to Exhibit

1 for City Drainwell Inspection Report.

C. Assessing Drainwell Systems

Techniques to assess drainwell systems include, but are not limited to, geophysical logging, step-drawdown testing, and load testing. Additional tests may be required on a case-by-case basis depending on the drainwell system design and location.

D. Geophysical Logging

If requested, a geophysical log/inspection will be performed on a well from the top of the structure to the bottom of the drilled well. The geophysical logs shall include at a minimum a caliper log and gamma ray log. The results from the geophysical log will be described in a written report stating the findings of the Work. All data from the geophysical logging will be provided to the City’s Project Manager in excel format, in hard copy log format, and portable document format (PDF) on a flash drive, share drive, or other digital device.

E. Step-Drawdown Test

On occasion, the Contractor may be asked to perform a step-drawdown test on a drainwell. The Contractor shall provide data logger(s) and pressure transducers with appropriate pressure ranges and vented for atmospheric compensation for measurement of water level changes or potentiometric pressure changes during the step-drawdown and constant rate discharge testing. The proposed method and setup for the step-drawdown testing shall be submitted to the City’s Project Manager for approval two (2) days minimum prior to running the test. The submittals shall include plans for accessing the well, routing of discharge water, pump equipment, meters, water level indicators, pressure transducers, data loggers, scheduling and all other items needed to perform the test.

Turbidity monitoring should be implemented to verify measurements are below the required background or less than twenty-nine (29) NTUs prior to discharge into any surface water body or drainage swale. A report detailing the applicable step-drawdown testing results shall be submitted to the City’s Project Manager. The report shall detail the actual test data, methodology, and any deviation from the original proposal along with an explanation of the rationale.

F. Load Test

On occasion, the Contractor may be asked to perform a load test on a drainwell. The load test is performed to determine the capacity of a well. The load test can be utilized to assess the capacity of a well and determine the quantity of sand in the well. The

Contractor shall provide data logger(s) and pressure transducers with appropriate pressure ranges and vented for atmospheric compensation for measurement of water level changes or potentiometric pressure changes during the test. The proposed method and setup for the load test shall be submitted to the City’s Project Manager for approval two (2) days minimum prior to running the test. The submittals shall include plans for accessing the well, routing of water, pump equipment, meters, water level indicators, pressure transducers, data loggers, scheduling and all other items needed to perform the test. A report detailing the applicable load testing results shall be submitted to the City’s

Project Manager. The report shall detail the actual test data, methodology, and any deviation from the original proposal along with an explanation of the rationale.

G. Drainwell Cleaning

The Contractor shall clean the buildup of material from within the drainwells using reverse air and/or straight air lifting methods, surging, water jetting, a combination of these techniques or other approved methods.

If requested by the City’s Project Manager, the casing of the drainwell shall be cleaned using an appropriately sized rotary brush or other tool to remove the growth from the sides of the drainwell. A description of the proposed cleaning process shall be submitted to the

City’s Project Manager for approval prior to the cleaning.

Mobilization, equipment, labor, safety considerations and precautions, and temporary rerouting of flows shall be appropriate for the situation. All materials from the cleaning process that are displaced during the cleaning operation shall be managed in accordance with the scope requirements. The Contractor shall furnish all labor, materials, equipment, traffic control, plugs, pumps and tools necessary for cleaning the drainwells and associated structures.

H. Repairing of Drainwells

Repair of existing drainwells will vary from well to well. The Contractor should assume a generic condition of lining an existing drainwell with a smaller casing such that there is sufficient room between the existing casing and the new casing to grout in between the casings. Color video of the completed well repair is required utilizing the approved methods described herein. The video should be provided to the City’s Project Manager on a portable external drive device, thumb drive, share drive, or other digital device within a seven (7) day period following completion of activities. These projects will be costed on a case-by-case basis.

4.10. ABANDONMENT OF DRAINWELLS

Drainwells that have been determined to be at the end of their useful life will need to be abandoned. The typical procedure for abandoning a drainwell includes the following:

• An abandonment authorization from the FDEP and/or WMD will be provided by the City's Project Manager.

• The City's Project Manager will notify the Contractor of the next steps in the abandonment procedures.

Drainwell abandonment shall include (as appropriate) backfill of the open hole section of the drainwell with clean aggregate to the top of the upper Floridan aquifer limestone layer and to at least the bottom of the well casing. Application of bentonite chips from the bottom of the casing up to a depth of fifty (50) feet below land surface or the potentiometric surface, whichever is specified by the City’s Project Manager. Following bentonite installation, the Contractor shall allow the bentonite to hydrate for a minimum of four (4) hours following the hydration period, the remaining well casing shall be tremie grouted with neat Portland cement up to the top of the well casing.

The manhole for the former drainwell should be removed and the area should be backfilled to grade and sodded for the restoration. All removed materials should be properly disposed of in accordance with local regulations.

4.11. SOIL STABILIZATION TECHNICAL REQUIREMENTS

This section covers compaction (soil stabilization) with Sand/Cement/Fly-ash grout including the installation of injection pipes. A geotechnical engineer firm will be contacted by the City’s Project Manager for projects requiring an assessment of potential soil instability. The location of the compaction grouting (soil stabilization) will be identified by the geotechnical engineer using GPR to locate areas in need of soil stabilization. If required, a geotechnical engineer shall be utilized to investigate the area and make recommendations on the appropriate course of action to complete the soil stabilization.

Under such circumstances, the soil stabilization Work shall be completed per the geotechnical engineer’s recommendations. The geotechnical engineer duties are not the responsibility of the Contractor.

A. General Responsibilities

The responsibilities of the Contractor include project control, supervision, labor, materials, and equipment to accomplish the following items of Work:

1. Submission of a detailed grouting plan to the City’s Project Manager for review prior to beginning the Work, unless a geotechnical firm is being used for the design.

2. Installation of grout pipes.

3. Monitoring ground and existing structure movements during grouting operations using survey methodology.

4. If a geotechnical firm is being used for the design, performing the approved grouting program under the supervision of personnel experienced in grouting for settlement control.

5. Contractor will be responsible for locating and protecting all utilities prior to abandonment activities.

6. Appropriate personal protection equipment (PPE) should be utilized when completing any grouting activities.

7. Field notes detailing these activities should be provided to the City’s Project Manager.

B. Equipment

The equipment used to mix and pump grout shall be specifically designed for this purpose.

Because of the high pressure involved, all equipment, including hoses, couplings, gauges, and pipes, shall be able to operate to the maximum requirements stated in the

Scope of Work. Inspections shall be performed by the Contractor on all equipment during set-up and breakdown of components supporting grouting activities at least on a daily basis. The mixing and grout pump system shall be designed to provide continuous flow of the grout mixture without interruption. Care should be taken during any single hookup for a specific stage due to inadequate batching or pump feed capacity.

C. Grout Mixing System

The grout mixing system shall be capable of thoroughly mixing grout for the duration of activities. Grout shall either be supplied by transit mix or mixed on site. On site mixing systems shall be capable of precisely measuring, recording, and mixing all materials.

D. Grout Pump System

The grout pump shall include a positive displacement type pump with variable speed capabilities. The grout pump shall have the capability of injecting grout at a pressure of two-hundred and forty (240) psi. The pump shall have a minimum capacity of zero (0) gpm and maximum of up to forty-five (45) gpm. Pumps shall be equipped with remote controls for operation in vicinity of the probe collar to control the injection process.

Equivalent systems may be proposed on a project-by-project basis.

E. Grout Delivery System

The grout delivery system shall consist of hoses, couplings, and pipes compatible with the equipment used for this Work and shall be capable of withstanding the pressures delivered by the pump. Pressure gauges shall be provided at the pump discharge and at the top of the injection pipe to monitor pressure.

F. Pressure Gauges

All pressure gauges shall be adequately protected from the grout with suitable gauge savers to provide accurate pressure reading on a continuous basis and shall be calibrated to a Master Gauge prior to use.

G. Grout Injection Volume Measurement System

There shall be a reliable mechanical means of measuring the quantity of grout pumped in every stage to within 0.25 cf.

Materials Used:

1. Sand: Sand shall conform to ASTM C-33

2. Cement: Cement (if used) shall be Type I or Type II Portland and free of contamination.

Cement shall be either supplied in water resistant paper bags or in bulk. Cement containing lumps shall be rejected or screened to remove lumps.

3. Fly-ash: Fly-ash (if used) shall conform to ASTM C-618 and be either Class C or Class

F.

4. Lime: Lime (if used) shall be hydrated agricultural lime. Lime shall be supplied in water resistant paper bags or in bulk. Lime containing lumps shall be rejected or screened to remove lumps.

5. Water: Water shall be clean and free from contamination. Volume shall be as necessary to achieve the desired slump.

6. Admixtures: Admixtures such as a SPs or a pumping aid may be added to increase set time or improve pumping ability.

Quantities of all materials provided and used during all activities should be included in the daily and/or inspection reports.

H. Grout Pipe Installation

The grout pipes shall be installed utilizing primary and secondary sequencing. The adjacent primary grout pipes shall be installed and grouted prior to installing or injection into the secondary pipes. The secondary pipes shall be installed after determination by the geotechnical engineer that the densification of the soil strata has not been sufficiently stabilized by the primary locations.

The pipes shall be either drilled or driven in the order indicated on the provided soil stabilization figure, if provided. Points should be installed one at a time to prevent locking in the subsurface by the grouting activities. The end of the pipe shall be sealed to prevent strata from entering the pipe during installation. The injection pipes shall be installed to prevent grout leakage and/or premature upward movement of the casing during injection of high-pressure compaction grout.

Pipes shall be steel of sufficient diameter and wall thickness to allow the grout to be placed over the range of slumps and to the pressures as specified in the geotechnical report.

I. Grout Injection

Grout shall be mixed on site or provided from a transit mix grout truck. The slump of the mix shall not exceed three inches (3") and injected at a rate not to exceed 4.0 cfm unless authorized by the City’s Project Manager.

Grouting pressure shall be continuously monitored at the surface connection to the injection pipe with a suitable protected gauge. A grid pattern for primary injection pipes shall be established and the grout shall be injected beginning at the lower depth of the grouting limits as provided in the geotechnical report that will be generated for each site requiring soil stabilization.

The grouting process shall progress in stages within each injection pipe using the bottom-up method. The bottom-up method’s stages start at the bottom of the grouting pipe, at least one (1) foot, into the underlying dense material, progressing upward at two (2) feet maximum intervals. The ground surface and adjacent structures shall be monitored at all times during grout injection for surface movement (heave). Pre-established monitor points on any structure shall be monitored during grout injection. Grout injection shall cease for any given stage when movement is detected, or when maximum injection pressure is reached or when a sudden drop in pressure is noted. Pressure shall drop when the injection pipe is raised, or the pipe will be considered plugged and shall be removed and reinstalled or cleaned out by a wash hose from the surface.

After completion of primary grouting, a secondary grid pattern, split spacing the first grid pattern injection points, shall be established. Grouting in secondary holes shall proceed as described for primary holes, if determined by the geotechnical firm or the City’s Project

Manager. Quantities for the secondary stage shall be compared with grout injected during the primary stage to ensure the subsurface material is becoming densified. The City’s

Project Manager shall be notified of the quantities placed in the secondary holes before this work is implemented.

J. Soil Stabilization Reporting

A report that includes the date(s) of soil stabilization, the equipment utilized, the flow rates, number of points, and other applicable items that were included in the activities shall be prepared. Copies of the soil stabilization report, a photo log, and logs detailing the quantities applied during soil stabilization shall be submitted to the City's Project Manager as attachments to the report which shall be submitted within fourteen (14) business days of the completion of activities.

4.12. REGULATORY REQUIREMENTS

The Contractor shall obtain all permits, licenses, and certificates.

Due to recent changes in FDEP and WMD policies, no other well construction/modification permit/approval is required at this time. However, should the permit requirements change, then the Contractor shall be responsible for obtaining any necessary well permits to perform Work on a drainwell system.

Any required City engineering permits will be provided by the City’s Project Manager.

The Contractor shall be responsible for obtaining any additional Federal, State, or Local permits required for performing the Work or discharging water from the site. If a generic discharge permit is required by the FDEP, the Contractor shall be responsible for obtaining the permit and for the compliance of all permit conditions.

Permit fees are to be paid by the Contractor and reimbursed at actual cost by the City.

Based on the size of the anticipated projects (<0.25-acre), NPDES permitting should not be required; however, methods to minimize turbidity should be utilized if discharge will be made into adjacent surface water bodies or drainage swales.

A. FDOT Standard Specifications

Work performed under the Contract including finished products shall conform and adhere to all applicable standards and specifications of FDOT "Standard Specifications for Road and Bridge Construction" (latest edition), and ESM (latest edition) unless otherwise specified herein.

All materials and Work shall conform to Sections 110, 125, 400, 407, 411, 413, 425, 430, 946, 949 and 981 of the FDOT “Standard Specifications for Road and Bridge

Construction” (latest edition) unless otherwise specified herein.

MATERIALS - Materials shall meet the requirements of Sections 110, 125, 400, 407, 411, 413, 425, 430, 946, 949 and 981 of the FDOT “Standard Specifications for Road and

Bridge Construction" (latest edition) unless otherwise specified herein except when authorized by the City’s Project Manager.

EQUIPMENT - Equipment shall conform to Sections 110, 125, 400, 407, 411, 413, 425, 430, 946, 949 and 981 of the FDOT “Standard Specifications for Road and Bridge

Construction” (latest edition) unless otherwise specified herein except where authorized by the City’s Project Manager.

All maintenance of traffic measures shall conform to FDOT "Standard Specifications for

Road and Bridge Construction" Section 102 and any other applicable standards.

All NPDES requirements shall adhere to FDOT "Standard Specifications for Road and

Bridge Construction" Section 104 as well as Section 6.14 and 6.14.01 of the City’s

"Engineering Standards Manual" (latest edition), provided upon request.

B. Federal, State And City Requirements

The Contractor shall conform to all Federal, State and City regulations during the performance of the Contract. Any fines levied due to inadequacies or failure to comply with all requirements shall be the sole responsibility of the Contractor. Any person found not in conformance with any laws, statutes, rules, or regulations will not be allowed on the job site or removed from the premises.

C. Licenses

The Bidder shall be certified by the State of Florida, Department of Business and

Professional Regulation (DBPR) as an Underground Utility and Excavation Contractor under the Construction Industry Licensing Board. Bidder shall provide a copy of said license with your bid response.

D. Other Licenses

Some projects may require a Water Well Contractor license from the Water Management

Districts (WMD). If applicable, the City's Project Manager may request said license be provided from the Contractor prior to starting Work.

E. Safety Training Certificates

The Bidder shall provide any safety training certifications that have been completed by the Bidder’s personnel that is pertinent to the applicable Work. The main certifications that should be included in your bid response are:

1. OSHA confined space certification

2. OSHA 10 certification

F. Safety

The Contractor shall conduct operations in strict accordance with all Regulations including, but not limited to, OSHA 29 CFR 1910, OSHA 29 CFR 1926, and 40 CFR

144.3, EPA, NIOSH, City’s Confined Space Program (provided upon request), and manufacturer's safety requirements. Particular attention is placed on safety requirements involving confined spaces, hearing conservation, and personal protective equipment. In addition, the Contractor, when required, shall be responsible for implementing MOT procedures in conformance with applicable City, State, and Federal standards.

The Contractor’s employees shall close off area(s) with safety cones or barricades and post signs indicating that the area is closed to pedestrian traffic when working over entrances, traveled walkways or any area where people might cross. The signs should indicate that crews are working. The Contractor shall provide safety cones, barricades, signs, and other related items at no additional cost to the City.

All existing structures, utilities, services, roads, trees, shrubbery, etc., shall be protected against damage or interrupted service by the Contractor during the Work Order(s), and the Contractor shall be held responsible for any damage to property caused by reason of his operations on the property.

If the Work Order should require an outage of utilities, the Contractor shall request authorization from the City’s Project Manager at least ten (10)…