Updated Specifications.pdf

DuBois Well Design USDAARSDSPWBWELL

SECTION 46 30 00

WATER AND WASTEWATER CHEMICAL FEED SYSTEMS

08/17

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI Z400.1/Z129.1 (2010) Hazardous Workplace Chemicals –

Hazard Evaluation and Safety Data Sheet and Precautionary Labeling Preparation

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA B300 (2018) Hypochlorites

ASTM INTERNATIONAL (ASTM)

ASTM D1785 (2015; E 2018) Standard Specification for

Poly(Vinyl Chloride) (PVC), Plastic Pipe, Schedules 40, 80, and 120

ASTM D1998 (2013) Polyethylene Upright Storage Tanks

ASTM F441/F441M (2023) Standard Specification for

Chlorinated Poly(Vinyl Chloride) (CPVC)

Plastic Pipe, Schedules 40 and 80

HYDRAULIC INSTITUTE (HI)

HI 9.1-9.5 (2021) Pumps General Guidelines for

Materials, Sound Testing, and

Decontamination - B117

HI ANSI/HI 7.1-7.5 (2017) Controlled-Volume Metering Pumps

American National Standard for

Nomenclature, Definitions, Application, and Operation - B115

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA ICS 1 (2022) Standard for Industrial Control and

Systems: General Requirements

NEMA ICS 2 (2000; R 2020) Industrial Control and

Systems Controllers, Contactors, and

Overload Relays Rated 600 V

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2023) National Electrical Code

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1.2 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-03 Product Data

Chemical Feed System; G

Safety Data Sheets

Auxiliary Equipment and Spare Parts

Factory Test Report

SD-06 Test Reports

Operating Tests

Tank Testing

Controlled Volume Pumps - Operational Tests; G

Controlled Volume Pumps - Time, Volume And Pumping Pressure Tests

Flow Tests; G

Synchronization Tests; G

SD-07 Certificates

Supplied Chemical

Service Organization

SD-10 Operation and Maintenance Data

Operating Instructions; G

Maintenance Instructions; G

1.3 MAINTENANCE MATERIAL SUBMITTALS

Concurrent with delivery and installation of the specified equipment, furnish auxiliary equipment and spare parts as follows:

a. For each machine: one extra of each part used that is made from glass, hard rubber, or clear plastic; one extra set of solution-hose connections; one extra set of diaphragms, two filler plug seal washers;

two ball checks; two seats; two complete sets of all gaskets; one spare diaphragm for each back pressure regulator; one hydraulic plunger assembly for each different size metering pump; one of each type of material back pressure regulator, with three spare springs and fluorocarbon resin diaphragms for each; one spare diaphragm and air valve for pulsation dampener.

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b. For each different size of direct current motor one SCR circuit board with 12 drive motor fuses and 12 SCR controller fuses; overload replacement elements for each size and type of motor.

c. One set of special tools for each type of equipment including calibration devices, and instruments required for adjustment, calibration, disassembly, operation, and maintenance of the equipment.

d. Two pairs of safety goggles and/or face shields, two chemical resistant aprons, and two pairs of chemical resistant gloves in one or more wall mounted steel cases.

e. One assembly tool for tubular diaphragm.

f. One lever type grease gun or other lubricating device for each type of grease required.

g. One or more steel tool cases mounted on the wall in a convenient location complete with flat key locks, two keys, and clips or hooks to hold each special tool.

h. One wall mounted two-bottle eye wash station.

1.4 DELIVERY, STORAGE, AND HANDLING

Protect material and equipment delivered and placed in storage from the weather, excessive humidity and excessive temperature variation, dirt, dust, or other contaminants.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

Provide a chemical feed system consisting of a chemical supply storage tank from which the chemical solution is pumped through piping or tubing, as appropriate, to the point of application. Include with each chemical feed system controlled volume pumps, tanks, mixers, gauges, back pressure regulators, strainers, pressure relief valves, sight glasses and flow metering devices, check valves, and hand valves.

2.1.1 System Requirements

Select and fabricatee the pumps in accordance with HI ANSI/HI 7.1-7.5 and

HI 9.1-9.5 except as modified herein. Provide pump stands and platforms adequate to support the pumping system.

2.1.2 Performance Requirements

Capacity and features of the chemical feed systems and accessories must be suitable for 24-hour full load service in ambient, non-freezing conditions.

2.1.3 Submittal Data for Chemical Feed System

Submit manufacturer's performance charts, and pump curves. List of materials, list of equipment, including a complete list of parts and supplies with current unit prices and source of supply. List of special tools for each type of equipment furnished including special tools necessary for adjustment, operation, maintenance, and disassembly.

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2.1.4 Extended Warranty

provide Manufacturer's Extended Warranty to cover system components for 5 years.

2.2 EQUIPMENT

2.2.1 Standard Products

Provide materials and equipment which are the standard products of a manufacturer regularly engaged in the manufacture of the products and that essentially duplicate items that have been in satisfactory use for at least

5 years prior to bid opening. Equipment must be supported by a service organization that is, in the opinion of the Contracting Officer, reasonably convenient to the site. Submit Service Organization Certificates outlining their location and qualifications to the Contracting Office.

2.2.2 Controlled Volume Pumps

Provide controlled volume pumps as defined by HI ANSI/HI 7.1-7.5. Each pump must be capable of delivering chemical solution at any rate from the minimum flow rate to the maximum flow rate and be capable of continuous operation at rated capacity. Accuracy must be plus or minus 2 percent over a 100 to 1 range from the required maximum capacity to the minimum pumping rate. Net positive suction head required cannot exceed 90 percent of the net positive suction head available, as installed. Provide in a configuration as simple as practicable to provide equipment isolation, bypass and reliable service and to be readily accessible for inspection, cleaning, adjustment, repairs, and replacements.

2.2.2.1 Disinfecting Agent Feed Systems

Provide the following for hypochlorite solution delivery.

Concentration of material on suction side of pump:

12.5 percent.

Number of pumps: One.

Type of pump: peristaltic pump

Configuration: Simplex.

Controls: Automatic rate adjustment.

Feed or flow rate: Minimum 0.01 gph; maximum 0.13 gph.

Make and Model: Stenner 45MP2 perostaltic pump or approved equal

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Back pressure at point of injection:

50 psig. Install back pressure regulating valve on the pump discharge and factory adjust to crack open at 40 psig. Regulators must be of polyvinyl chloride construction with fluorocarbon resin diaphragms.

Suction valve cartridge: Single ball check.

Discharge valve cartridge: Single ball check.

Materials of construction allowed for wetted parts:

Type 316 stainless steel, or PVC,.

2.2.3 Controls

Provide the chemical metering equipment with the appurtenances and accessories, as required, for flow capacity adjustment. Provide manual range adjustment on all systems.

2.2.3.1 Automatic Control

Provide automatic control with the capability to vary feed rate based on signals from a flow meter or controller.

2.2.4 Drives for Controlled Volume Pumps

Provide with and drive the metering pumps by alternating current electric motor drives.

2.2.4.1 Pump Activation Drive

Provide appropriate regulation devices to coordinate with the activation and continuous flow of each well pump.

2.2.4.2 Electric Motor Drive

Electric motor must be of sufficient capacity to operate the chemical metering equipment under all operating conditions without exceeding their rated nameplate current or power, or their specified temperature limits.

Provide motors having starting characteristics and ruggedness necessary under the actual conditions of operations or clean-up procedures used in the areas where they are located. Alternating current motors with power rating of 1/3 hp or less must be 115 volts, single-phase, 60-Hz service;

motors with power rating in excess of 1/3 hp must be 460 volts, three-phase, 60-Hz service. Electrical features of direct current motors, including the ratings of the motors, must be compatible with the capabilities and ratings of the rectifier controllers with which they are used.

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2.2.5 Valves

2.2.5.1 Metering Pump Valves

Equip the metering pump with adjustable internal vacuum and pressure relief valve, hydraulic oil refill valve, and automatic air bleed valve. The relief valve must be adjustable over the full pressure range of the pump and preset at the factory.

2.2.5.2 Suction and Discharge Valves

Fit suction and discharge valve cartridges with ball checks that open to full pipe diameter.

2.2.5.3 Back Pressure Valve

Install back pressure regulating valve on the pump discharge and factory adjust to crack open at the indicated pressure. Provide spring opposed diaphragms with loading pressures adjustable by means of a screw in the top works.

2.2.6 Solution Tanks

Provide tanks that are fully resistant to the effects of the full-strength and fully diluted solution concentrations, and be pressure rated for 1.5 times the weight of solution at full capacity. Each tank must have the capacity listed in the following table and be equipped with a fill nozzle, vent, discharge, level instrument, drain, and two spare connections.

Reinforce tanks to withstand all forces when full of solution. Tanks must be completely shop fabricated with no field assembly permitted. Provide drain connections permitting complete drainage of the tank. All gaskets must be fluorocarbon elastomer; nuts and bolts Type 316 stainless steel;

and steel supports either stainless or epoxy coated. Furnish each tank with a calibrated side wall strip to indicate volume. Attach a permanent plastic sign indicating the tank contents to the front of each tank. Fit tanks smaller than 36 inches in diameter with removable lids. Manufacture polyethylene tanks in accordance with ASTM D1998. Provide tanks designated to be double walled or provided with secondary containment, as indicated in the tables.

2.2.6.1 Disinfecting Agent Tank

Provide hypochlorite solution resistant tank and comply with the following:

Number of tanks: One.

Minimum tank capacity: 30 gal.

Sign reading: 12.5% Sodium Hypochlorite.

Containment: Double wall and secondary containment or single wall with spill containment pallet.

2.2.7 Pressure Gauges

Provide diaphragm type gauges with Bourdon tube and diaphragm compartments filled completely with oil, and made of materials suitable for the

SECTION 46 30 00 Page 6 application. Install diaphragm seals at each gauge connection to isolate gauges from corrosion, sludge or other hazards of the process fluid.

Provide seal material that is compatible with the oil in the gauge and the process fluid.

2.2.8 Injectors

Introduce injectors for chemical solution into the pipeline mains by means of a plastic injection nozzle or quill, or by means of a suitable diffuser tube inserted through a corporation cock. Construct the device for introducing the solution into a pressure main in such a way that accidental breakage of discharge hose or tubing does not cause water to escape from the pipeline, and allows disassembling of the unit without leakage.

2.2.9 Piping

2.2.9.1 Chemical Solution Piping

Incorporate provisions to allow solution piping to be conveniently and safely bled of trapped air and minimize infiltration of air bubbles.

2.2.9.1.1 Smaller than 1-1/2 inch Diameter

Chemical solution piping smaller than 1-1/2 inch diameter must be PE conforming to ASTM D1785 or CPVC pipe conforming to ASTM F441/F441M tubing.

Provide plastic fittings for plastic pipe with compression fitting joints.

Make joints for rubber hose using a clamp-type mechanical coupling.

2.2.9.2 Plumbing

Provide water piping, drain, waste and vent piping in accordance with

Section 22 00 00 PLUMBING, GENERAL PURPOSE.

2.2.10 Electrical Work

Provide electric motor-driven equipment complete with motor, motor starter, and controls. Provide electrical equipment and wiring in accordance with

Electrical Specifications. Implement hazard classifications in accordance with NFPA 70.

2.2.10.1 Control and Protective Devices

Provide automatic control and protective or signal devices required for the operation and any control wiring required for controls and devices.

Provide motor controls conforming to NEMA ICS 1 or NEMA ICS 2. Prewire equipment to the maximum practicable extent.

2.2.11 Equipment Appurtenances

Provide galvanized steel, cadmium plated or Type 316 stainless steel bolts, nuts, anchors, washers and all other types of supports necessary for the installation of the equipment.

2.3 MATERIALS

Submit Safety Data Sheets in conformance with ANSI Z400.1/Z129.1 for each chemical. Provide a 10 day supply at the maximum pumping rate for each feeder or pair of duplexed feeders. Submit two copies of certification stating that each supplied chemical meets the following requirements.

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2.3.1 Disinfecting Agents

AWWA B300 hypochlorites.

PART 3 EXECUTION

3.1 EXAMINATION

After becoming familiar with details of the work, verify all dimensions in the field, and advise the Contracting Officer of any discrepancy before performing the work.

3.2 INSTALLATION

Submit detail drawings containing complete piping, wiring, schematic, flow diagrams, and any other details required to demonstrate that the system has been coordinated and properly functions as a unit. On the drawings show proposed layout and anchorage of equipment and appurtenances, and equipment relationship to other parts of the work including clearances for installation, maintenance and operation.

3.2.1 Chemical Feeding Equipment

Install controlled volume pumps, equipment, and appurtenances to provide a complete and integrated system in accordance with the instruction of the manufacturer and under the direct supervision of the manufacturer's representative.

3.2.2 Pipe, Tubing, Hangers and Supports

Install pipes and tubes in accordance with Section 22 00 00 PLUMBING, GENERAL PURPOSE.

3.2.3 Framed Instructions

Submit framed instructions for approval prior to postings. Final size must be easy to read by operators 5 feet from instructions. Limit frame size to

11" x 17" size provide multiple frames if needed. Post framed instructions, containing wiring and control diagrams, where directed. Post condensed operating instructions as outlined in paragraph 3.4.2 Operating

Instructions. Post the framed instructions before acceptance testing of the systems.

3.3 FIELD QUALITY CONTROL

3.3.1 Testing

After installation of each controlled volume pump, carry out operating tests as specified below to assure that the chemical metering installation operates properly. If any deficiencies are revealed during any tests, correct such deficiencies and reconduct the tests. Submit reports of all tests in booklet form prior to final acceptance of the installation. Show all field tests performed to adjust each component and all field tests performed to prove compliance with the specified performance criteria, upon completion and testing of the installed system. Indicate in each test report the final position of controls.

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3.3.1.1 Tank Testing

Clean tanks of loose debris and dry prior to testing. Field test tanks for leaks or damage in shipment. Test each tank with its solution for a period of 24 hours at which time no visible leakage is evident. Supply all pipes, hoses, pumps, water, power and other equipment required to convey the test liquids and to carry out the tests. Repair damage or leaks in tanks or replace tanks.

3.3.1.2 Controlled Volume Pumps - Operational Tests

Test pumps to demonstrate that the pumps are capable of operating without vibration or leakage. Perform testing at the pump's maximum flow rate and at half the flow rate and minimum flow rate. Demonstrate testing while controlled and operated in all feasible modes with the pumps operated singly and in unison.

3.3.1.3 Controlled Volume Pumps - Time, Volume and Pumping Pressure Tests

Test pumps by filling a portable calibrated standpipe furnished by the

Contractor with chemical and measuring the outage, with all other equipment valved off. Record the time, volume and pumping pressures.

3.3.1.4 Flow Tests

Test pumps to demonstrate zero gpm flow at a zero stroke or speed setting.

Failure to meet this test is cause for rejection. Test pumps through full range of performance: min. flow 0.01 gallons per hour. Submit test results to prove pump functions within specified system parameters.

3.3.1.5 Synchronization Tests

Operate the pumps for a period of 4 hours to demonstrate that the double diaphragm systems do not lose their synchronization. Loss of synchronization is also cause for rejection; repair or replace the pump as necessary to achieve synchronization. Fully retest repaired or replaced equipment.

3.3.2 Chemical Waste

Neutralize chemicals wasted during testing procedures to achieve a pH value between 6.5 and 9.5 and a chlorine concentration of not more than 1 percent

(10,000 mg/L). Route all chemicals wasted during testing procedures as directed by the Contracting Officer at a rate that the process can assimilate without upset.

3.3.3 Manufacturer Field Service

Provide the services of a manufacturer's representative who is certified by manufacturer in the installation, adjustment, and operation of the equipment specified. The representative must supervise the installation, adjustment, and testing of the equipment. Submit certificates to

Contracting Officer for approval.

3.4 CLOSEOUT ACTIVITIES

3.4.1 FIELD TRAINING

Conduct a field training course for designated operating, maintenance and

SECTION 46 30 00 Page 9 supervisory staff members. Provide training for a total period of 1 hour of normal working time and start after the system is functionally complete but prior to final acceptance tests. Cover all of the items contained in the Operating and Maintenance Instructions during field training.

3.4.2 Operating Instructions

Submit complete copies of operating instructions outlining the step-by-step procedures required for system startup, operation and shutdown. Include in the instructions the manufacturer's name, model number, service manual, parts list, and brief description of all equipment and their basic operating features. Also include in the instructions as-built drawings of the piping layout, equipment layout, simplified wiring and control diagrams of the system as installed, and flow diagrams.

3.4.3 Maintenance Instructions

Submit complete copies of maintenance instructions listing routine maintenance procedures, possible breakdowns and repairs, and trouble-shooting guides.

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