Supplement_Specification.PDF

SECTION 46 61 00

FILTRATION EQUIPMENT

02/11

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 WATER WORKS ASSOCIATION (AWWA)

AWWA B100 (2009) Standard for Granular Filter Material

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Filtration System; G

Include complete wiring and schematic diagrams; equipment layout and anchorage; and any other details required to demonstrate that the system has been coordinated and will properly function as a unit.

SD-03 Product Data

Qualifications Media

SD-06 Test Reports

Acceptance Testing

SD-07 Certificates

Materials and Equipment

SD-10 Operation and Maintenance Data

Field Training Operating and Maintenance Instructions

1.3 QUALIFICATIONS

Submit qualifications of the installer, and the manufacturer's and

SECTION 46 61 00 Page 1 media supplier's representatives.

1.3.1 Installer

The installer shall have a minimum of 10 years experience in the installation of a minimum of 5 similar filtration systems and shall show evidence of satisfactory operation for each installation.

1.3.2 Manufacturer's Representative

A representative of the filtration system manufacturer, who is familiar with the design and experienced in the installation, adjustment, and operation of the equipment specified shall be present at the jobsite during installation of the filtration system.

1.3.3 Media Supplier Representative

A representative of the media supplier who is experienced in the installation of the specified filtration media shall be present at the jobsite during media installation.

1.4 DELIVERY, STORAGE, AND HANDLING

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

1.5 EXTRA MATERIALS

Standard spare parts shall be provided as recommended in the manufacturer's instruction manuals for each component of the equipment. Submit spare parts data for each different item of material and equipment specified.

Include in the data a complete list of parts and supplies, with current unit prices and source of supply.

PART 2 PRODUCTS

2.1 MEDIA

Filter materials shall conform to the requirements of AWWA B100 or KAWWA F 100. Sieve analysis shall be performed in accordance with ASTM C136 or KS F 2502 and AWWA B100or KAWWA F 100. Specific gravity shall be determined in accordance with ASTM C127 or KS F 2308 for support media and KAWWA F 101 for anthracite media. Submit characteristics of each filter media material.

2.1.1 Anthracite

The anthracite coal shall have a specific gravity of between 1.60 and 1.70, uniformity coefficient of 1.4-1.8, and an effective size between 0.6mm and 1.0mm. The anthracite media shall be clean and free from thin or scaly pieces, and shall have a carbon content 95% minimum and ash content 10% maximum and hardness 3.0-3.5 on MOH scale.

2.1.2 Support Media

The support gravel shall consist of hard, rounded stones with an average specific gravity of not less than 2.5. The gravel shall be free from shale, mica, clay, sand, loam, and organic impurities of any kind.

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PART 3 EXECUTION

3.1 EXAMINATION

Verify all dimensions in the field and advise the Contracting Officer of any discrepancy before performing the work.

3.2 PAINTING

Painting shall be performed in accordance with applicable requirements provided in Section 09 90 00 PAINTS AND COATINGS, and additional requirements provided herein.

3.2.1 Metal surfaces

Me, except aluminum, bronze, brass, galvanized steel, and stainless steel shall be painted. Surface preparation and painting shall be performed in the shop or in the field as indicated. Manufactured items, such as motors and switchboards, shall be finished with the manufacturer's standard finish.

3.3 SUPPORT MEDIA

The gravel shall be placed by hand to avoid movement to the underdrain system and to ensure free passage of water from the underdrain. Each gravel layer shall be completed before the next layer above is started. Gravel that becomes mixed shall be removed and shall be replaced in layers as specified. The correct thickness of each layer shall be obtained as follows: Before the gravel is placed, the top of each layer shall be marked on the side of the filter. Then the top of each layer shall be leveled against a water surface held at the appropriate mark. None of the particles shall be less than half submerged, and there shall be no places where additional gravel can be placed without the particles extending more than 1/2 their volume above the water surface. The support gravel shall be backwashed after it has been placed, in accordance with AWWA B100 or KWWA F 102.

3.4 FILTER MEDIA INSTALLATION

Media shall be installed under the supervision of the filter equipment supplier. Before installing the filter media, check all piping connections and ensure filter components are in good condition and proper position.

3.4.1 Media Layers

Each layer of media shall be completed before the next layer above is started. Each layer of media shall be deposited so as not to disturb the level surface of the layer below. Any media which is made dirty before or after placement shall be removed and replaced.

3.5 FIELD TESTS AND INSPECTIONS

Perform field tests in the presence of the Contracting Officer and provide labor, equipment, and incidentals required for the tests. Provide for disposal of all waste residuals resulting from the tests. Notify the Contracting Officer 7 days prior to the date and time for the acceptance tests. Any deficiencies found shall be rectified and work affected by such deficiencies shall be retested.

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3.5.1 Initial Operation

Following completion of installation of the treatment systems and after the Contractor and manufacturer's representative agree the system is ready for operation, the system shall be operated over an initial operating period .

Demonstrate proper operation of the equipment, including, but not limited to, the ability of the system to produce the minimum specified effluent requirements detailed in Paragraphs Design Criteria or Cartridge and Bag Design Criteria (as applicable), proper operation of the media cleaning equipment, and the control system ability to provide the correct operational logic to optimize the filtration process.

3.5.2 Acceptance Testing

The acceptance tests shall demonstrate the ability of the filtration system to meet the effluent specified requirements when operating at the design flow rate and to demonstrate the control system ability to provide the correct operational logic to optimize the filtration process. In the event that the specified filtered water quality requirements are not met during the acceptance testing, the defective equipment or operation or filter media shall be modified or replaced and the testing repeated. The schedule for retesting is subject to approval by the Contracting Officer.

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