Event_4315_-_Specification.pdf

SPECIFICATIONS FOR

Event 4315 - CORROSION INHIBITOR

DIVISION OF WATER TREATMENT & DISTRIBUTION SERVICES

DEPARTMENT OF PUBLIC WORKS

CITY OF MINNEAPOLIS

(612) 661-4906

I HEREBY CERTIFY THAT THIS SPECIFICATION WAS PREPARED BY ME OR UNDER MY DIRECT

SUPERVISION AND THAT I AM A DULY REGISTERED PROFESSIONAL ENGINEER UNDER THE LAWS

OF THE STATE OF MINNESOTA.

Peter J. Pfister, Superintendent, Water Plant Operations

DATE 9/18/2026 REG. NO. 42709

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SPECIFICATIONS FOR CORROSION INHIBITOR

Minneapolis Division of Water Treatment & Distribution Services Minneapolis, Minnesota

1. GENERAL

Bids are requested for liquid sodium 50/50 ortho/poly phosphate blended corrosion inhibitor for reducing lead, copper and iron concentrations at the tap of the City of Minneapolis water consumers. The bid is to furnish the corrosion inhibitor for a twelve-month period beginning November 1, 2026. Product is to be delivered by either of two means: Delivery by tank truck of approximately 4,000 (four thousand) gallon capacity or in Intermediate Bulk Containers (“Totes”) of approximately 300 (three hundred) gallon capacity.

The product to be supplied, the handling, packing, shipping, and testing thereof, except where otherwise herein specified, shall conform to accepted industry standards. The product shall possess ANSI/NSF Standard 60 certification. The product must comply with AWWA standards B504 and/or B505 as applicable (latest versions).

Quantities in this specification are presented as total pounds PO4 due to the varying total phosphate content of available products. Over the twelve-month period, the total quantity required is estimated to be 160,000 pounds as total phosphate (PO4

-). The approximate split between delivery needs is 30,000 pounds PO4 by tote supply and 160,000 pounds PO4 by tank truck. The actual total amount and amount by delivery type will be contingent upon treatment plants’ production rates and operating conditions.

2. SECURITY PROVISIONS

All chemical shipments will leave the chemical vendor’s facility with security seals on the valves and openings into the product storage vessel. The seals will only be broken or removed in the presence of City staff at City facilities before unloading. If the seals are broken or tampered with before delivery, or without City staff present, the chemical shipment will be refused. A signed weight certificate must be furnished on delivery.

Before a truck delivery to City facilities is accepted, staff must be in receipt of an email from the vendor containing the following information. If an email has not been received, or the delivery driver is different from the provided information, the shipment will not be received until verification or authenticity can be established by City staff.

• Driver name and CDL number and license photo

• Passenger(s) name, if any

• Seal numbers

• Tractor #

• Trailer #

• Bill of lading #

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All drivers and passengers must stop at the City-designated staging area for pre-screening. No access is allowed until pre-screening process is complete.

• The pre-screening process requires all drivers and passengers to submit government issued photo identification.

• No weapons allowed on site unless they are secured (locked up) in the vehicle.

• Pets must remain in the vehicle or be on a leash at all times.

• Delivery vehicles are subject to search by City staff or City’s security personnel

• Visitor badges will be issued to drivers delivering to the Fridley Filtration Plant or the Fridley

Softening Plant.

3. ORDERING AND DELIVERY

Prior to or upon bid award, the Supplier will provide a telephone number for order placement.

Delivery hours are Monday-Friday, 7:00 a.m. with off-loading complete by 3:00 p.m.

Shipments shall be on order of the Water Treatment Plant Supervisor for the City. At the time of order, the City Supervisor shall provide the Supplier with a City of Minneapolis Purchase Order (PO) number for each delivery. This PO number must be on the invoice subsequently submitted. The City’s mailing address for all delivery locations is 4300 Marshall Street NE. Minneapolis, MN 55421.

A certificate of analysis (CoA) and a certified scale ticket shall accompany each load of product delivered. As an alternate, these items can be emailed in advance of the delivery.

The CoA shall provide documentation of each load’s weight percent assay of total phosphate (% PO4 w/w) and the weight percentages of orthophosphate and polyphosphate.

• Supplier will ensure any product spills or releases during delivery have been properly reported and cleaned up.

• Supplier personnel shall wear the appropriate protective face and body apparel, as required by the Occupational Safety and Health Act, when unloading the product. Driver shall remain at fill station throughout the unloading process and monitor the unloading process.

3.1 Delivery by tank trucks

The delivery locations for tank truck delivery are

a. Minneapolis Water

Fridley Filtration Plant 4500 Marshall Street Fridley, MN 55421 (Note that delivery entrance is located at 4100 E. River Road) anthony.thompson@minneapolismn.gov

b. Minneapolis Water

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Columbia Heights Membrane Plant 4500 Reservoir Boulevard NE Columbia Heights, MN 55421 Eric.pederson@minnepolismn.gov

Delivery will be by tank truck of approximately 4,000 (four thousand) gallon capacity. The total available storage at location (a) is 16,000 (sixteen thousand) gallons. The total available storage at location (b) is 6,000 (six thousand) gallons. No split deliveries between locations (a) and (b) are anticipated.

The City, at its discretion, may also weigh trucks delivering to location (a) in and out of its facilities on a certified scale (such as in situations where partial loads are received). City staff will direct the driver at the time of delivery to weigh in and out.

Upon request by City personnel, Driver must collect a sample of the chemical being delivered in the presence of WTDS plant personnel and provide that sample for testing. Testing of the sample will be performed by City staff to determine the specific gravity of the chemical and the percentage of phosphate (PO4) and other parameters as needed. Driver will allow City personnel 15 minutes to examine sample and perform testing before unloading.

3.2 Delivery of 275- or 330-gallon Intermediate Bulk Containers (“Totes”):

The delivery location for tote delivery is:

c. Minneapolis Water Works

Fridley Softening Plant 4100 E. River Road Minneapolis, MN 55421 steven.valtinson@minneapolismn.gov

Delivered quantities shall typically be four (4) totes unless otherwise called for by City’s supervisor. Documentation of totes’ weight percent assay of total phosphate (% PO4 w/w) shall accompany each delivery.

Minneapolis will provide a forklift truck for use in unloading of totes. Empty totes shall be picked up by the supplier within 30 days of owner’s request.

4. BIDS

A. Bid price shall be expressed in U.S. dollars per pound of total phosphate as PO4. One bid price shall be submitted and paid for delivery both by tanker truck and tote

B. Bidder shall submit their proposed product’s data sheet with their bid. The data sheet shall include the following information at a minimum:

(1) Product density or specific gravity,

(2) Orthophosphate and polyphosphate, and total phosphate percentages by weight for the solution, and

(3) Concentrations of active ingredients and contaminants

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C. Bidder shall indicate their willingness to provide City the option to extend the contract at bid price(s) for one or two additional 12-month periods (through October 2027 or through October 2028).

5. SUBMITTALS

Prior to contract award, successful bidder shall submit the following documentation for each product(s) to be furnished:

a) Proof of certification under ANSI/NSF Standard 60 -Drinking Water Treatment Chemicals - Health Effects.

b) GHS Safety Data Sheet(s) for each product to be furnished.

6. PRODUCT QUALITY

The phosphate reversion rate of the corrosion inhibitor shall be six percent or less per 90 (ninety) days.

The product composition shall be in the range of 45 (forty-five) percent ortho, 55 (fifty-five) percent poly to 55 (fifty-five) percent ortho, 45 (forty-five) percent poly. The poly phosphate shall be of the tri-poly or hexameta form. Pyrophosphate is not acceptable.

The product supplied shall contain no soluble mineral or organic substances including bacterial in quantities capable of producing deleterious or injurious effects upon the health of those consuming the treated water.

The product additive as a carrier must not cause more than minimal sluffing of corrosion products from the distribution pipe interior at required sustained feed rates.

The product shall be free flowing, easy to +pump feed and not subject to feed line plugging.

Should laboratory testing determine the delivered product failed to meet specifications;

prospective supplier is responsible for removing non-compliant chemical and replacing it with fresh chemical meeting the specifications.

7. INVOICING AND PAYMENT

Payment will be on the basis of dry pounds total phosphate (PO4) delivered. For each delivery and associated invoice, the following shall be documented:

• Net pounds product delivered o Gross minus tare weight from weigh ticket for tank truck deliveries or o Sum of all totes’ net weight product received in a given delivery

• Assay weight percent total phosphate (% PO4 w/w) for delivered product.

Payment = Net pounds × Assay (% PO4) x $Bid Price

• Invoices shall be submitted by email to submitinvoices@minneapolismn.gov

• On the first page of all invoices, the following shall be provided:

o PO number o Location Delivered: Columbia Heights Membrane Plant, Fridley Filtration mailto:submitinvoices@minneapolismn.gov

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Plant, or Fridley Softening Plant o Department / Division – PW Water

Upon receipt of invoice and final inspection and acceptance of the service, the City will render payment within thirty (30) days unless any items thereon are questioned, in which event payment will be withheld pending verification of the amount claimed and the validity of the claim. The Contractor shall provide complete cooperation during any such investigation.

September 2026