1-IFB25-26 06.pdf

INVITATION FOR BIDS

FOR

POTABLE WATER STORAGE FACILITY

CLEANING & INSPECTION SERVICES (IFB25/26-06)

Issued by:

Robert Ferro, Purchasing Officer

Procurement & Contracts Division Alameda County Water District

43885 S. Grimmer Blvd.

Fremont, CA 94538 Tel.: (510) 668-4290

TABLE OF CONTENTS Page

SECTION 1: INVITATION

SECTION 2: INFORMATION / INSTRUCTIONS TO BIDDERS

2.1 DEFINITIONS

2.2 BACKGROUND

2.3 EXAMINATION OF BID DOCUMENTS

2.4 SOLICITATION TIMELINE

2.5 PRE BID MEETING & SITE VISIT

2.6 BIDDER QUESTIONS

2.7 POINT OF CONTACT

2.8 ADDENDA TO THE SOLICITATION

2.9 BIDDER QUALIFICATIONS

2.10 PREPARATION AND SUBMISSION OF BIDS

2.11 SUBMITTALS

2.12 PRICING

2.13 GROUNDS FOR REJECTION

2.14 PERIOD FOR ACCEPTANCE OF BIDS

2.15 MODIFICATION, WITHDRAWAL, MISTAKES, AND MINOR INFORMALITIES

2.16 RESERVATIONS

2.17 MULTIPLE BIDS

2.18 TIE BIDS

2.19 NO WAIVER

2.20 SUBSTITUTIONS

2.21 AWARD OF CONTRACT

2.22 EXECUTION AND ACCEPTANCE OF THE CONTRACT

2.23 PUBLIC RECORDS

2.24 PREVAILING WAGES

SECTION 3: SCOPE OF WORK/SERVICES AND SPECIAL PROVISIONS

3.1 GENERAL DESCRIPTION

3.2 DISTRICT FACILITIES

3.3 SCOPE OF WORK

3.4 EXECUTION OF WORK

3.5 DIVING REQUIREMENTS

3.6 DISPOSAL OF SEDIMENT

3.7 COMMENCEMENT AND COMPLETION OF WORK

3.8 INSPECTIONS

3.9 DISTRICT RESPONSIBILITIES

3.10 PAYMENT SCHEDULE

3.11 BASIS OF AWARD

3.12 CONTRACT TERM

3.13 LIQUIDATED DAMAGES

3.14 CONTRACT DOCUMENTS

3.16 DISTRICT HOLIDAYS

3.17 STATUS OF CONTRACTOR, LICENSES AND PERMITS

3.18 WORK AREAS AND ACCESS

3.19 SITE CONDITIONS

3.20 CONTROL OF WATER IN FLOOD CONTROL CHANNEL

3.21 ACCIDENT PREVENTION / SAFETY

3.22 UTILITIES AND FACILITIES

3.23 CALIFORNIA AIR RESOURCES BOARD REQUIREMENTS

SECTION 4: APPENDECES A, B &C

SECTION 1: INVITATION

The Alameda County Water District (District) invites qualified and licensed Contractors to respond to this Invitation for Bids (IFB) for potable water storage facility cleaning and inspection services (Services).

The District has 13 potable water storage facilities located within its service area, the cities of Fremont, Newark and Union City, where the services shall be performed. The District’s intent is to issue an Agreement with a two (2) year base term and three (3) one-year options for renewal.

SECTION 2: INFORMATION / INSTRUCTIONS TO BIDDERS

2.1 DEFINITIONS

Whenever the following words occur in this Contract, they shall have the following meanings:

BIDDER means any potential Contractor who responds to this Invitation for Bids.

COMPETITIVE SEALED BIDDING is a transparent procurement method in which Bids from competing contractors, suppliers, or vendors are invited by openly advertising the scope, specifications, and terms and conditions of the proposed Contract. Award is typically made to the lowest responsive and responsible Bidder.

CONTRACT ADMINISTRATOR shall mean the District employee under whom the Contract will be performed, directed, inspected and supervised. Any reference to the Contract Administrator in the Contract shall mean the Contract Administrator or designated representative.

CONTRACTOR or CONSULTANT means any person having a Contract with ACWD.

DISTRICT or ACWD shall mean the Alameda County Water District.

INVITATION, INVITATION FOR BIDS, or IFB means all documents, whether attached or incorporated by reference, utilized for soliciting sealed competitive Bids, also referred to as Solicitation.

PURCHASING OFFICER mean the ACWD employee duly authorized to enter into and administer contracts and make written determinations with respect thereto.

RESPONSIBLE BIDDER means a Contractor who has the capability in all respects to perform fully the requirements stated in the Invitation for Bids and who has the integrity and reliability that will assure good faith performance.

RESPONSIVE BIDDER means a Contractor who has submitted a Bid that fully conforms to the requirement of the Invitation for Bids.

WORK means the requested services, supplies or equipment.

2.2 BACKGROUND

The District is a California Special District located in the San Francisco Bay Area. The District supplies water to the cities of Fremont, Newark, and Union City in southern Alameda County. The first water district formed in California under the County Water District Act of 1913, the District today has a staff of approximately 230 employees and supplies drinking water to more than 357,000 people. The District covers approximately 100 square miles and provides water service through over 84,000 connections. With diverse water sources that include the State Water Project, water imported from the City and County of San Francisco Water Department, and local groundwater, the District has consistently been able to accomplish its mission of providing a reliable supply of high-quality water at a reasonable price to its customers.

2.3 EXAMINATION OF BID DOCUMENTS

· The Work described herein shall be in accordance with ACWD’s Specifications, current Terms and Conditions, Special Provisions contained or referenced in this Solicitation.

· Before submitting a Bid, each Bidder must (a) examine the Bid Documents thoroughly and (b) familiarize itself with any applicable Federal, State and local laws, ordinances, rules and regulations, and specifications affecting performance of the Work in this IFB.

· The submission of a signed Bid will certify that the Bidder has read, understands and can comply with every requirement of this IFB, including its terms and conditions, under which this IFB will be awarded, administered, and performed.

2.4 SOLICITATION TIMELINE

The following is the anticipated Solicitation timeline. The District reserves the right to extend any deadline in the timeline below by issuance of an addendum.

Activity Date

Bid Issued: August 1, 2025 Mandatory Pre-Bid Meeting & Site Visits: August 11th & 12th @ 8:00 a.m.

Questions From Bidders Due: August 15, 2025 District’s Responses to Questions (Addendum): August 18, 2025 Bid Due Date: September 1, 2025 by 3:00 p.m.

Anticipated Award: October 2025

2.5 PRE BID MEETING & SITE VISIT

The District will hold a Pre-Bid Meeting at the District’s Headquarters, located at 43885 South

Grimmer Boulevard, Fremont, CA 94538. At the time and date specified in Section 2.4. Attendance to the meeting is mandatory. The meeting shall consist of a review of the solicitation process, required services and submittals, followed by two (2) days of comprehensive site visits. Please RSVP to Robert Ferro, Purchasing Officer, Robert.ferro@acwd.com.

2.6 BIDDER QUESTIONS

All prospective Bidders must carefully examine the Solicitation documents, including terms and conditions. In the event of doubt of anything contained in this IFB, all questions or requests for clarification about the meaning or intent, discrepancies or omissions of the bid documents shall be submitted in writing no later than date specified in Section 2.4 via the District’s E-Procurement system website at https://acwd.bonfirehub.com.

Responses to questions and requests for clarification will be posted to the District’s E-Procurement system website via https://acwd.bonfirehub.com no later than date specified in Section 2.4.

Only questions answered in a formal written response will be binding. Oral and other interpretations or clarifications will be without legal effect. Any information given to a prospective Bidder by the District will be furnished to all prospective Bidders, if that information is necessary in submitting Bids, or if the lack of such information would be prejudicial to other prospective Bidders.

Bidders are responsible for checking the District’s website for any addenda. The District makes no guarantee that any questions submitted after the deadline will be answered.

2.7 POINT OF CONTACT

The Point of Contact for this solicitation is Robert Ferro, Senior Buyer, (Robert.ferro@acwd.com).

Bidders are not permitted to contact District employees, other than the Point of Contact identified above regarding this IFB.

2.8 ADDENDA TO THE SOLICITATION

Each Bidder shall acknowledge receipt of any addendum to this Solicitation by acceptance of the addendum on the District’s e-procurement system. Failure to acknowledge the addenda prior to the time and place specified for receipt of Bids may render the Bid non-responsive.

2.9 BIDDER QUALIFICATIONS

· Performance and Experience Bidder shall be responsible and have the capability to properly furnish the Services for the duration of the contract term, and shall have the necessary expertise, personnel, equipment, and sufficient capital to provide the Work.

· Licenses and Certifications Bidders shall possess a current C-61/D12 Contractor’s License, issued by the State of California.

Contractor shall also be required to possess a confined space certification.

· Minimum Experience Bidders shall have a minimum of seven (7) years of experience in underwater reservoir cleaning.

Also, Bidders shall have cleaned a minimum of three (3) potable water reservoirs, with a minimum capacity of three (3) million gallons (MG), within the last five (5) years.

· References Bidder shall be required to provide three (3) customer references (government or private industry for contracts of similar scope and size completed within the last five (5) years. These customers may be contacted by the District. Responses will be considered by the District in assessing Bidder responsibility. Customer contact information must be submitted in via https://acwd.bonfirehub.com. Any bid submissions not submitted to the address listed shall not be considered

· Personnel All divers shall be required to meet or exceed ANSI/ACDE 01 commercial diver training minimum standard requirements and California Code of Regulations Title 8 Sections 6050-6063.

2.10 PREPARATION AND SUBMISSION OF BIDS

· Bid Forms Each Bidder shall submit a Bid using the available forms provided by the District, through the E-procurement system. All forms must be completed in full and all blank spaces shall be properly filled in. Each Bidder shall state a fully burdened cost for the stated service or commodity listed in the IFB.

Bidders shall comply with instructions in the Bid. The Bid must include Bidder name, contact name, address, email address and telephone information.

If changes are required, changes can be made up to the closing date and time listed in Section

2.4 “Solicitation Timeline.” For the Bid to be responsive there must be no question about what the Bidder intended.

Unless specifically called for in the IFB, alternate Bids will not be considered and the Bid shall be deemed non-responsive.

Completed Bid forms and required attachments shall be submitted via https://acwd.bonfirehub.com. Any bid submissions not submitted via https://acwd.bonfirehub.com shall not be considered.

Each bid must be received with guaranty, if applicable, prior to the time set for the receipt of Bids.

No other method of submission, other than those specified herein, shall be considered.

Unauthorized conditions, limitations or provisions attached to a bid will render the bid non-responsive.

· Location & Timely Delivery The Bidder shall assume full responsibility for timely delivery via https://acwd.bonfirehub.com for receipt of Bids.

Upon receipt by the Procurement & Contracts Division, each Bid shall be stamped with the time and date received via the District’s E-Procurement System.

Any Bid received after the exact time for receipt as specified in Section 2.4 will not be considered for award. However, an exception may be made when a late Bid would have been timely but for the action or inaction of District personnel.

· Opening of Bids Bids will be received until the date and time as specified in Section 2.4. Bids shall not be opened until said day and time. Bids will not be publicly opened. Bid results will be posted via https://acwd.bonfirehub.com

2.11 SUBMITTALS

Each Bidder shall submit the following at the time of bid:

· Complete the required Bid Table in the District’s eProcurement System (Euna Procurement)

· Complete the required questions in the District’s eProcurement System (Euna Procurement)

· A copy of valid contractor’s license uploaded to District’s eProcurement System (Euna

Procurement).

· A copy of valid confined space certification uploaded to District’s eProcurement System (Euna

Procurement).

2.12 PRICING

Prices should be stated in the units specified. If there is a discrepancy between the unit price and total or extended price, the unit price shall prevail. Where there is a conflict between words and figures, words will govern.

2.13 GROUNDS FOR REJECTION

Any false, incomplete or otherwise unresponsive statements in or in connection with a bid or any documentation or other information supplied to the District by a Bidder shall be cause for rejection by the District of the bid or disqualification of the Bidder at the District’s sole discretion. Any judgment as to the significance of any falsity, incompleteness or unresponsiveness shall be made at the discretion of the District, and its judgment shall be final.

2.14 PERIOD FOR ACCEPTANCE OF BIDS

In order to allow for adequate evaluation, the District requires a response to this Solicitation to be valid and irrevocable for 120 calendar days after submittal date and time.

No Bidder may withdraw a Bid within 120 days after the Bid opening date. Errors in judgment and/or carelessness on the part of the Bidder in preparing the Bid confer no right for the withdrawal of the Bid after it has been opened. Should there be valid reasons why the Contract cannot be awarded within the specific period the time may be extended by mutual agreement between the District and the Bidder.

2.15 MODIFICATION, WITHDRAWAL, MISTAKES, AND MINOR INFORMALITIES

· Bids may be withdrawn prior to the Bid due date, via the District’s e-procurement system at https://acwd.bonfirehub.com

· Bidder may modify a bid by withdrawing its original bid and submitting a replacement bid, via https://acwd.bonfirehub.com provided that the Bidder’s withdrawal and replacement bid occurs prior to the IFB closing date time.

· A replacement bid must be executed, and submitted in a form and manner that complies with the requirements set forth in this IFB.

· No withdrawal request or replacement bid will be allowed after the IFB closing time.

· After the bid closing time, Bidder’s may not withdrawal their bid for a period of One Hundred and Twenty (120) days.

· At no time may the successful Bidder withdraw their bid.

2.16 RESERVATIONS

The District reserves the right to do any of the following at any time:

· Reject any or all Bids;

· Waive or correct any minor or inadvertent defect, irregularity, informality, or technical error and any Bid or procedure as part of the IFB;

· Require Bidder to submit breakdown of cost or pricing data provided in Bid;

· Make multiple awards from this solicitation;

· Accept Bid for any item or group of items unless the Bidder specifies otherwise in the Bid or gives notice of an all or nothing award;

· Terminate this IFB or any portion of the IFB process and issue a new IFB any time thereafter;

· Extend any or all deadlines in the IFB, including the deadline for accepting bids;

· Disqualify any Bidder on the basis of any real or apparent conflict of interest or evidence of collusion that is disclosed by the bid or other data available to the District. Such disqualification is at the sole discretion of the District and its decision shall be final;

· Reject the bid of any Bidder that is in breach of or in default under any other agreement with the District;

· Reject any bid deemed by the District to be non-responsive and/or conditional;

· Make such investigations as deemed necessary to determine if a Bidder is capable of meeting contract requirements. The determination of the District as to the Bidder’s ability to perform is at the sole discretion of the District and its decision shall be final;

· Determine whether a bid meet, exceed or does not meet District’s specification.

2.17 MULTIPLE BIDS

A Bidder may submit only one Bid via https://acwd.bonfirehub.com. More than one Bid from an individual, firm or partnership, corporation or association under the same or different names will not be considered on any given Bid and may be considered grounds for rejection and disqualification of the Bids involved.

2.18 TIE BIDS

A tie bid exists when two or more responsive and responsible Bidders submit bids with an identical price. Award will be determined by a toss of a coin performed by the Purchasing Officer in the presence of the two tie bidders.

2.19 NO WAIVER

The District’s failure to address errors or omissions in a bid or acceptance of a bid shall not constitute a waiver of any requirement of the IFB by the District.

2.20 SUBSTITUTIONS

Whenever a material, article or method is specified or described by using the name of a proprietary product or the name of a particular manufacturer or vendor, followed by the phrase "or equal", the specific item mentioned shall be understood as establishing the type, function, dimension, appearance and quality desired and is to be the basis upon which Bids are to be prepared. Other manufacturers’ materials, articles or methods not named will be considered provided the substitution will not require revisions of the Bid Documents.

2.21 AWARD OF CONTRACT

The District shall award a Contract to the lowest, responsive and responsible Bidder who submits the Bid in conformance with the IFB.

The District will make a determination of whether the minimum qualifications, as described in Bidder’s Qualifications herein, have been met.

The Contract will be awarded by the District, by written acceptance within 120 days after the day of the Bid Opening or within the time for acceptance specified in the Invitation for Bids, or in any extension thereof agreed to by the parties.

2.22 EXECUTION AND ACCEPTANCE OF THE CONTRACT

The Bid as submitted shall serve as the final Contract acceptance document of a Bidder. The District will advise the selected Bidder by issuing an Intent to Award letter, as well as request any additional documentation as required by the Contract Documents.

Failure by the Bidder to execute the Contract and submit other documents as required by the IFB and file acceptable insurance and bonds within five (5) business days of receiving the Intent to Award letter shall be just cause for canceling the Award. Award may then be made to the next lowest, responsive and responsible Bidder or the Work may be re-solicited, at the sole discretion of the District.

A notice to proceed (NTP) will be issued after (1) a Contract has been executed by both the District and the successful Bidder and (2) receipt and acceptance by the District of a Bidder’s insurance, bonds, if applicable and any other required documents.

2.23 PUBLIC RECORDS

The California Public Records Act (commencing at California Government Code Section 7920) mandates public access to government records. Therefore, unless the information is exempt from disclosure by law, the content of any request for explanation, exception, substitution, response to these specifications, protest, or any other written communication between the District and the Bidder shall be available to the public.

If the Bidder believes any communication contains trade secrets or other proprietary information that the Bidder believes would cause substantial injury to the Bidder’s competitive position if disclosed, the Bidder shall request that the District withhold from disclosure the proprietary information by marking each page containing such proprietary information as confidential. The Bidder may not designate its entire bid as confidential. Additionally, the Bidder may not designate the Bid Forms or cost as confidential.

If the Bidder requests that the District withhold from disclosure information identified as confidential and the District complies with the Bidder’s request, the Bidder shall assume all responsibility for any challenges resulting from the non-disclosure, indemnify and hold harmless the District from and against all damages (including but not limited to attorneys’ fees that may be awarded to the party requesting the Bidder information), and pay any and all costs and expenses related to withholding Bidder information. The Bidder shall not make a claim, sue, or maintain any legal action against the District or its directors, officers, employees or agents in connection with the withholding from disclosure of Bidder information.

If the Bidder does not request that the District withhold from disclosure information identified as confidential, the District shall have no obligation to withhold the information from disclosure and may release the information sought without liability to the District.

2.24 PREVAILING WAGES

Contracts exceeding $1000 with the District are considered “Public Works” when they include services for construction, alteration, demolition, repair work and maintenance services.

If the project falls within the classifications of “Public Works” The project will require payments of not less than the general prevailing rates for per diem wages, overtime work, legal holidays, other employee payments, and travel & subsistence if applicable, in the locality in which the work is to be performed for each craft, classification, or type of worker needed as required in the California Labor Code. Such rates of wages are on file with the Department of Industrial Relations and in the office of the District and are available to any interested party upon request.

Contractors shall promptly notify the District in writing, about any classifications of labor not listed in the prevailing wage determination but necessary for the performance of the work.

Contractors will post a copy of the determination of prevailing rates at the job site/s.

If the contract totals $30,000 or more and requires 20 or more working days, the prime contractor will comply with and be responsible for compliance with all applicable provisions of Labor Code section 1777.5 for all apprenticeable occupations.

Each contractor and subcontractor shall keep accurate payroll records, showing the name, address, social security number, work classification, straight time and overtime hours worked each day and week, and the actual per diem wages paid to each journeyman, apprentice, worker, or other employee employed by him or her in connection with the public work. Each payroll record shall contain or be verified by a written declaration that is made under penalty of perjury. The District requires hard copies of these records for verification, prior to making related payments to the contractor (this is in addition to the electronic reporting required by the DIR).

This is notice that contractor/s and subcontractor/s: must register with the California Department of Industrial Relations (DIR) and that:

· This project is subject to compliance monitoring and enforcement by the Department of Industrial Relations.

· No contractor or subcontractor may be listed on a bid proposal for a public works project unless registered with the Department of Industrial Relations pursuant to Labor Code section 1725.5 [with limited exceptions from this requirement for bid purposes only under Labor Code section 1771.1(a)].

· No contractor or subcontractor may be awarded a contract for public work on a public works project unless registered with the Department of Industrial Relations pursuant to Labor Code section 1725.5.

· All contractors and subcontractors must furnish electronic certified payroll records directly to the Labor Commissioner (aka Division of Labor Standards Enforcement).

SECTION 3: SCOPE OF WORK/SERVICES AND SPECIAL PROVISIONS

3.1 GENERAL DESCRIPTION

The District’s water storage facilities, which include both tanks and reservoirs, require inspection and cleaning services over the course of the next five (5) years. The Contractor shall provide all labor, materials tools, instrumentation and equipment to satisfactorily complete the Work. It is the intent of the District to schedule inspection and cleaning of one (1) or two (2) potable water storage facilities annually. The District reserves the right to forgo cleaning or inspection based on operational needs or restrictions. Nothing in this Specification shall be interpreted as relieving the Contractor of the responsibility of meeting all applicable federal, state and local codes and regulations.

3.2 DISTRICT FACILITIES

The District has 13 potable water storage facilities located within its service area, the tri-city area of Fremont, Newark and Union City. Please refer to Appendix C for a brief written description of each facility and an informational matrix. The District reserves the right to maintain the facility on-line during cleaning. In the event that the facility cannot be taken out of service, the District will maintain a positive flow into the facility as recommended by AWWA Standard C652. Due to emergency and fire storage requirements, only one facility shall be taken out of service at a time. If a reservoir or tank needs to be taken out of service to make repairs that cannot be done underwater, the Contractor shall drain and clean the reservoir and disinfect the tank or reservoir per AWWA C652-19 Disinfection of Water Storage Facilities prior to tank or reservoir return to service.

3.3 SCOPE OF WORK

The following scope of work, which is applicable to all District potable water storage facilities, includes but is not limited to the following principal items:

· Develop, submit and implement the following:

o Safety Plan (for underwater diving operations only) o Safe Practices Manual o Material and Equipment Storage Plan o Emergency Response Plan o Site Security Plan o De-chlorination Procedure of Water Prior to Disposal o Filtration and Sediment Management Plan o Disinfection Plan o Progress Schedule

· Implement Best Management Practices (BMPs) for Discharge of Water Generated from Reservoir Cleaning Operations to existing storm drain facilities.

· Clean the storage facilities and remove all sediment accumulated on the facility floors, walls, berms, and columns.

· Disinfect washed down walls and appurtenances according to AWWA Standard C652-19, if reservoir is drained and cleaned.

· Remove and replace the cathodic protection reference probe from inside the tank, if applicable.

· Conduct a comprehensive inspection of the facilities, per bullet 4 of Section 3.4 “Inspection Report and Video.”

· Implement measures to dewater sediments to less than 50% moisture and no free liquid, see Section 3.6 “Disposal of Sediment.”

· Certify dewatered sediments as non-hazardous per specified methods and analysis.

· Off-haul, removal, and legal disposal of sediment

· Site cleanup

3.4 EXECUTION OF WORK

· Disinfection All materials, personnel, and equipment coming in contact with potable water inside the tank or reservoir shall be disinfected in accordance with AWWA Standard C652-19. All disinfectants used in connection with this project shall be NSF approved for use in potable water. The Contractor shall provide evidence to this regard prior to mobilization.

The District will request that the storage facility cleaning shall be accomplished by dive and clean or drain and clean.

o Dive and Clean

Reservoir entry shall be performed in a manner that protects water quality, and in accordance with Section 4 of AWWA Standard C652-19. All equipment and clothing shall be disinfected immediately prior to entry into the facility. The diver and the clothing shall be disinfected after the diver is suited up. The dive suit shall completely encapsulate the diver with no bare skin exposed, this includes hands. There shall be no contact of the mouth or head with the water during inspection. The head shall be fully encapsulated by a helmet or dry suit hood with full face mask. Between uses, all equipment and clothing dedicated for potable water, underwater inspection work shall be stored in a manner that prevents both chemical and bacteriological contamination.

Any runoff of chlorinated solution generated during disinfection of materials, personnel and equipment, shall be properly contained in a bermed area and dechlorinated prior to discharge.

o Drain and Clean Tank or reservoir disinfection shall be performed in accordance with AWWA Standard C652-19, Method 2, after cleaning all walls, floor, and operating facilities in accordance with the “Cleaning” Section below. A solution of at least 200 mg/L available chlorine shall be applied directly to all surfaces or parts of the facility that would be in contact with water when the storage facility is full to the overflow elevation. The chlorine solution may be applied with suitable brushes or spray equipment. The solution shall thoroughly coat surfaces to be treated, including the inlet and outlet piping, and shall be applied to any separate drain piping such that it will have available chlorine of not less than 10 mg/L when filled with water. The disinfected surfaces shall remain in contract with the strong solution for at least 30 minutes, after which potable water shall be admitted, the drain piping purged of the 10 mg/L chlorinated water, and the storage facility filled to it’s overflow level. The District shall collect two bacteriological sample, collected 24 hours apart, prior to returning the reservoir to service. Successful disinfection will be based on passing the two bacteriological samples.

· Dechlorination, Disposal of Water, Filtration and Sediment Management All water and sediment pumped from the reservoirs shall be dechlorinated by the Contractor with Sodium Metabisulfite, Sodium Thiosulfate, Ascorbic Acid or equivalent and filtered through storage tanks, filter bags and/or large capacity steel-type storage tanks prior to discharge into storm drain location point shown on the project drawings. The District reserves the right to prohibit the use of large capacity steel -type tanks on sites where space is limited; poly-type tanks will be considered. The Contractor shall have available materials to create a temporary holding lagoon in the event runoff needs to be controlled or directed to a specific point of drainage.

Effluent total chlorine residual shall be non-detectable (0.04 mg/L or lower), turbidity shall be less than 50 NTU, and pH shall be between 6.5 and 8.5. Water from all District fire hydrants and storage facilities is treated with chloramine.

A representative sample(s) of the sediment collected from the potable water facility shall be analyzed and profiled to determine appropriate waste classification as specified in Section 3.6 “Disposal of Sediment.” Following waste profiling, all filter bags and sediment shall be properly packaged, labeled and removed from the site by the Contractor.

o Dechlorination, Disposal of Water Ø Two weeks prior to mobilizing any equipment and material on-site, the Contractor shall provide a comprehensive plan for dechlorination and sediment filtration. The

Contractor’s plan shall specify exactly what equipment they are planning on using during the cleaning, and the estimated discharge pump flowrates, if pumps are used. Contractor is responsible for demonstrating that the capacity of the storm drain or other drainage system is not exceeded.

Ø The plan should indicate exactly how the discharge will be dechlorinated. If an in-line system will be used, the capacity of the system needs to be disclosed, and the estimates or calculations for the flow rate and dechlorination agents submitted to the District for review.

Ø The Contractor should anticipate a range of chlorine residual between 0.5 to 2.5 parts per million (ppm or mg/L) in the storage facilities. Contractor shall stock sufficient dechlorination tablets, granules or powder for dechlorination.

Ø The spray down solution used for disinfection shall be contained and dechlorinated prior to discharge.

Ø Contractor shall monitor for dechlorination and shall measure the total chlorine residual with a Hach 890 (or equivalent) within first 10 minutes of discharge, a second sample within the next 50 minutes, and a third sample within the last 10 minutes, at the discharge point(s).

Ø Contractor shall document its dechlorination monitoring and provide to the District dechlorination log sheets at the end of the project. Daily log sheets shall be kept on site and available for District inspection on a daily basis.

Ø Contractor shall monitor discharge flow rates in outfall structure and daylight discharge pipe as shown on the project drawings. At no time shall the discharge flow rate be so great as to cause the outfall structure to overflow or soil erosion to occur at or around the outfall of the discharge pipe.

Ø At any time, if the District determines the dechlorination and disposal of water plan is not functioning according to the submittal and discharge limitations, the Contractor shall immediately implement measures, which may include reduction of or temporary suspension of discharge of water or temporary suspension of cleaning operations, to bring the disposal plan back in conformance at no additional cost to the District.

o Filtration and Sediment Management Ø The Contractor shall submit a detailed description of methodology of dechlorinating and filtering sediments from discharge water and the plan shall be approved by the District prior to commencement of work. The Contractor shall have available materials to create a temporary holding lagoon in the event run off needs to be controlled or directed to a specific point of drainage.

Ø The Contractor shall be responsible for ensuring that no sediment in excess of local applicable discharge regulations be discharged from the site during the cleaning. The contractor shall use available Best Management Practices (BMPs) including but not limited to, Baker-type storage tanks, rock or gravel socks, sandbags, non-woven geosynthetic material filter bags, and filter bags, to ensure that sediment is removed prior to discharge.

Ø Contractor shall monitor turbidity and pH. Turbidity and pH shall be measured every 15 minutes at the beginning of the day and every hour thereafter, at the discharge point(s) post-BMPs.

Ø Contractor shall document its turbidity and pH monitoring and provide to the District log sheets at the end of the project. Daily log sheets shall be kept on site and available for District inspection on a daily basis.

Ø At any time, if the District determines the filtration and sediment management plan is not functioning according to the submittal and discharge restrictions, the Contractor shall immediately implement measures, which may include additional equipment or temporary suspension of cleaning operations, to bring the management plan back in to conformance at no additional cost to the District.

Ø All sediment accumulated behind the filtering barriers shall be removed daily.

Ø All sediment accumulated shall be properly stockpiled and covered to protect it from the elements until disposal by the Contractor.

Ø No sediment or soil shall be disposed on-site.

Ø All sediment within the Baker-type storage tanks, and all, Baker-type storage tanks and sediment bags shall be removed within two weeks of completion of tank cleaning.

Ø The soil and filter bags shall be properly contained and covered (during inclement weather) until disposal. Bags may be left uncovered during dry weather.

· Cleaning Cleaning shall be accomplished without creating any visible turbidity which shall be monitored by constant live video feed to the surface and turbidity monitoring by District personnel.

Contractor supplied video monitors shall be at reservoir site(s) and available at all times for viewing by District personnel.

The District will request that the storage facility cleaning shall be accomplished by dive and clean or drain and clean.

o Dive and Clean

Facilities shall be cleaned “in situ” while full of water, but out of service in order to avoid possible contamination due to accidents, procedural errors, and security breaches and to allow for verification of the absence of bacteriological activity. Reservoir cleaning shall commence after the Contractor mobilizes onto the site and sets up its equipment for the cleaning work. Reservoir cleaning shall be by an underwater diver using surface supplied air and shall include vacuum removal of sediment and removal by hand of any debris too large to be vacuumed up. The dive operation shall include an audio system to permit two-way communication to relay specific requests to the diver, and a camera mounted on the diver’s helmet shall allow those outside the tank to see what the diver is looking at.

o Drain and Clean Reservoir cleaning shall be performed in accordance with AWWA Standard C652-19. All scaffolding, planks, tools, rags, and other materials not a part of the structural or operating facilities of the reservoir shall be removed. Then the surfaces of the walls, floor, and operating facilities of the storage facility shall be cleaned thoroughly using a high-pressure water jet, sweeping, scrubbing, or equally effective means without damaging the reservoir liner or tank coating.

The Contractor shall provide storage tanks for containment of sediment-laden water removed from the potable water storage facility by vacuum cleaning, chemical treatment (if required) to enhance sediment settling, and filtration so as to meet the requirements of the discharge permit.

Filtered water shall be discharged in strict accordance with the current governing discharge permit. The current governing discharge permit can be found on the California State Water Resources Control Board website by following the link to NDPES No. CAG14001 at https://www.waterboards.ca.gov/water_issues/programs/npdes/general_permits.shtml.

Cleaning procedures must combine adequate brushing of surfaces cleaned, in addition to removing material from the reservoirs by water suction. In addition to cleaning all sediment or other material from the floor of the reservoirs, the Contractor must ensure that all sediment is removed from all floor or floor to wall seams, top surfaces of support column bases, plumbing fixtures and supports, inlet / outlet pipe structure, or any other area where the vacuum does not reach during normal floor cleaning. Brushing shall be done in conjunction with vacuuming to remove potentially hazardous biofilm. A stationary or fixed brush inside a vacuum head will be considered, provided that the Contractor’s methodology is thoroughly described and demonstrated to remove biofilm. Hydraulic jetting will not be considered. The brushing shall be vigorous enough to remove biofilm without damaging the liner or coating, or causing excess visible turbidity.

The silt and debris shall be removed from the reservoir bottom and side slopes without damaging the liner. Dechlorination, disposal of water, filtration and sediment management shall be in accordance with bullet 2 of Section 3.4.

Sediment removal will be considered complete only when an unobstructed view of the storage bottom is achieved. Sufficient still photos are to be taken to demonstrate compliance.

No cross connection shall exist between the potable water storage facility and the vehicle or tank used to store or transport the sediments removed from the potable water storage facility. Cross-connection backflow prevention control measures shall be employed to avoid potential cross-connection incidences from occurring.

· Inspection Report and Video For each facility, the Contractor shall submit two (2) copies or an electronic copy in pdf format of a written inspection report and provide an inspection video and sufficient still color photographs to provide a reasonable documentation of the condition of the potable water storage facility interior before and after completion of work.

o Tank & Reservoir Inspection and Report Ø A schematic drawing of the tank and reservoir shall be included with the report. The reservoir shall be divided into sections and a number system for the sections of the reservoir shall be designated on the drawing.

Ø All tank and reservoir appurtenances shall be described in terms of coating condition and extent of corrosion. Any mechanical or structural defects visually recognizable shall be identified.

Ø The report shall quantify the level of sediment found in the tank or reservoir.

Ø The inspection video shall include pertinent portions of the cleaning as it is done to show amounts and types of material found in the tank or reservoir. This video shall show before and aftereffects of cleaning with close up views to verify adequate brushing of surfaces. Still photos at the bases of columns, to be chosen by the District shall be included. Documentation of findings will be shown on the reservoir drawing.

o Recommended Repairs The report shall outline the recommended repairs based on the observations and inspections of the diving team. Group the recommendations by the following priority system:

Priority 1: Structural integrity related. Failure to make this repair could result in a structural failure of the tank, reservoir, or appurtenance.

Priority 2: Maintenance related repairs. This type of repair is required, but the necessity to complete it is not urgent.

Priority 3: Maintenance suggestions. This type of recommendation is not a required repair but may aid in the future maintenance of the tank or reservoir

3.5 DIVING REQUIREMENTS

The Contractor shall prepare and submit a Safe Practices Manual which contains a copy of the commercial diving operations standard (CCR Title 8 Sections 6050-6063) and the Contractor’s policies for implementing the requirements of the standard. This document shall be submitted at least two weeks prior to reservoir entry.

All personnel on the dive team shall be free of communicable diseases and shall not have been under a physician’s care, or has needed a physician’s care, within the seven-day period prior to entering or working in reservoir. No person shall be permitted to work in a potable water storage facility that has an abnormal temperature or gives evidence of illness. All members of the dive team shall be required to provide notification from a physician indicating good health, based on an examination to be made within one (1) week of entry into the reservoir. No deviation from this stipulation may be permitted.

3.6 DISPOSAL OF SEDIMENT

The Contractor shall be responsible for the legal disposal of all tank and reservoir sediment. The Contractor shall inform the District in writing that all sediment has been legally disposed of.

Contractor shall implement measures to dewater the removed reservoir sediment to contain greater than 50% solids by volume and no free standing liquid prior to disposal. Contractor shall secure a representative reservoir sediment sample and shall have the necessary soil characterization analysis and soil profile (i.e. CAM 17 metals, at a minimum), performed by an independent laboratory, in order to certify the sediment as a hazardous or non-hazardous waste per Title 22 CCR 66260.

Contractor shall submit a certified lab analysis from an independent laboratory to the District before removal of sediment is scheduled. No sediment shall be removed from the site until the District has reviewed the lab report. Sampling and sample management of reservoir sediment for analysis and testing shall be in accord with the sampling planning, methodology and equipment, and the sample processing, documentation and custody procedures specified in chapter nine of “Test Methods of Evaluating Solid Waste, Physical/Chemical Methods,” SW-846, 3rd edition, U.S. Environmental Protection Agency, 1986. As a minimum, every lab report shall state the name of the storage facility from which the sample came, the name(s) of the test(s) performed and the classification of the sediment during testing as dried sediment or wet sediment for analysis. The laboratory results of any Total Threshold Limit Concentration (TTLC) test for metals shall be given in units of mg/kg. If the sample has the potential to exceed Soluble Threshold Limits Concentration (STLC) levels based on the sample characteristics and the TTLC test results, then the contractor shall have STLC analyses performed in accordance with the Waste Extraction Test (WET) procedures given in Appendix II of Section 66261.24 of the California Code of Regulations. The District reserves the right to have such collected sediment samples also analyzed by the District laboratory.

Disposal of reservoir sediment through the reservoir drain to a watercourse, flood control channel or creek shall not be allowed.

Should the reservoir solids be deemed a hazardous waste, the Contractor shall dispose of such waste according to Federal, State and local laws. The Contractor shall notify the District of any such hazardous waste and the District reserves the right to a copy of any tests conducted on the waste and, at the District cost, to perform additional tests or examine the waste, prior to removal and disposal of such waste. Hazardous waste shall be disposed of by a licensed hazardous waste transporter using uniform hazardous waste manifest forms and taken to a proper disposal site. The Contractor shall coordinate with the District to dispose of the hazardous waste under an EPA Generator Number. A copy of all the manifests shall be provided to the District. Solids that are determined to be a hazardous waste, that are required to be disposed of as hazardous waste, shall be paid for through a bi-lateral amendment to this Agreement.

3.7 COMMENCEMENT AND COMPLETION OF WORK

Work shall begin on a mutually agreed upon date. It is agreed by the Contractor that time is of the essence. The length of time that each tank and reservoir will be out of service for cleaning and inspection shall not exceed the number of consecutive calendar days outlined in Table 1, please refer to section

3.13 “Liquidated Damages.” The Contractor must obtain from the District, in writing, approval to exceed the number of maximum days listed on Table 1 at least one week prior to mobilization.

Table 1: Maximum Allowable Days Out of Service Per Storage Facility

Facility Name Capacity (MG)

Maximum Allowable Days Out of Service

(Consecutive Calendar Days)

Return to Service Allowance

(Consecutive Calendar Days)

Appian Tank 0.75 5 5

Avalon Tank 2.75 5 5

Canyon Heights Tank 0.48 5 5

Hidden Valley Tank 2.0 5 5 MSJ Treated Water Tank 0.75 5 5

Ohlone Tank 1.43 5 5

Vineyard Heights Tank 0.54 5 5

Alameda Reservoir 16.3 28 -

Decoto Reservoir 14.5 28 -

Mayhew Reservoir 4.6 21 -

Middlefield Reservoir 7.1 21 -

Patterson Reservoir 14.2 28 -

Whitfield Reservoir 20.6 42 -

The District may require up to seven (7) calendar day allowance to enter the facility for repairs, without additional charge to the District. The seven (7) calendar days will be added to the number of maximum allowable days out of service noted in Table 1.

3.8 INSPECTIONS

Some parts of the project may be subject to inspection by at least the following agencies:

· Alameda County Flood Control and Water Conservation District

· State Water Quality Control Board, Division of Drinking Water

· Bay Area Regional Water Quality Control Board

· Union Sanitary District

· Fremont Fire Department

· Alameda County Fire Department

3.9 DISTRICT RESPONSIBILITIES

The District shall be responsible for:

· Providing prompt and concise response to Contractor queries.

· Providing the necessary cathodic protection reference probe(s), if applicable.

· Disconnecting the existing cathodic protection probe outside of the tank and connect the new reference probe. The Contractor shall allow four (4) hours in the project schedule per facility for the District to perform this work.

3.10 PAYMENT SCHEDULE

The District anticipates adhering to the following payment schedule for each water storage facility:

· Dive and Clean o Sample collection for analytical testing / implementation of BMP’s 30% o Cleaning, removal and legal disposal of sediment 50% o Site clean-up 5% o Submittal of inspection report and video 15%

· Drain and Clean (if applicable) o Dewater storage facility / implementation of BMP’s 20% o Sample collection for analytical testing 10% o Cleaning, removal and legal disposal of sediment 30% o Disinfection and passing of bacteriological testing 20% o Site clean-up 5% o Submittal of inspection report and video 15%

3.11 BASIS OF AWARD

The District will make an award to the lowest responsive and responsible Bidder, as determined by a comparison of the totals of Bid Schedule A “Dive and Clean.” Bid Schedule B “Drain and Clean” shall not be used to determine the low bid.

3.12 CONTRACT TERM

The base term of the Contract shall be for a period of two (2) years, during which all prices shall remain firm. The Contract may be extended for an additional three (3) one-year option terms, or any portion thereof, at the sole option and discretion of the District. Should the District exercise the option(s) to extend the Contract, labor rates may be adjusted at the beginning of each option year in accordance with Section 3.15 “Economic Price Adjustment.”

3.13 LIQUIDATED DAMAGES

Contractor shall complete the work as outlined in this scope of work in accordance with a mutually agreed upon time frame. The number of days a tank or reservoir remains out of service for cleaning and inspection shall be in accordance with Section 3.7, Commencement and Completion of Work. It is agreed by the parties to the Contract that if work is not completed as previous agreed upon, in writing, the follow liquidated damages shall be applied.

Failure to initiate or satisfactorily complete all work for each of the potable water storage facilities within the agreed upon times or as may be extended as provided in the Contract Documents shall result in liquidated damages of Six Hundred Ninety-Two Dollars ($692.00/day) per calendar day per storage facility.

3.14 CONTRACT DOCUMENTS

The Contract Documents may include any or all of the following: Invitation for Bids, Bid Submittal, Bonds, if applicable, Notice of Award, Notice to Proceed, Drawing(s), Technical Specification(s), Terms and Conditions, Special Provisions, and Addenda.

3.15 ECONOMIC PRICE ADJUSTMENT

All prices will remain firm for the base term of the Agreement period. Any de- escalation/escalation in prices may be approved on an annual basis thereafter at the…