ADDENDUM NUMBER: MODIFYING: Specifications No....

May 2009 - 1 - 1633

DATE: May 12, 2009 ADDENDUM NUMBER: 2 MODIFYING: Specifications No. 1633 PROJECT: F.E. Weymouth Water Treatment Plant - Inlet Conduit Relocation and Rapid Mix Systems BID TIME AND DATE: 2:00 p.m., May 28, 2009 FROM: THE METROPOLITAN WATER DISTRICT OF SOUTHERN CALIFORNIA

700 North Alameda Street, Third Floor Los Angeles, California 90012 (P.O. Box 54153, Los Angeles, California 90054) (213) 217-6515

TO: All prospective bidders This addendum forms a part of the contract documents. Use Specifications No. 1633 as originally issued to submit bids, in conjunction with this addendum and all previously issued addenda, and acknowledge receipt of this addendum by completing Document 00420, “Bidder's General Information,” in the specifications.

This addendum consists of 8 pages of text, 21 pages of attachments, and 54 sheets of 11" x 17" drawings.

CHANGES TO SPECIFICATIONS: 1. In Section 01060, “ Safety and Regulatory Requirements,” at the end of Paragraph 1.01H, add the following

Paragraph 1.01I: I. The Contractor shall submit to the Engineer a copy of the NPDES discharge permit(s) and/or MS-4 permit(s)

obtained for the discharge of leak test, hydrostatic test and/or disinfection water as described in Article 1.21.

2. In Section 01060, Paragraph 1.04B, delete the second sentence, which begins: “Also, all unconfined blasting…”

3. In Section 01060, insert the following Paragraph 1.04C and renumber the succeeding paragraph accordingly: C. All regulated portable equipment that will be used onsite shall have an active “Permit To Operate” from the

South Coast Air Quality Management District and/or a portable equipment registration from the CARB. Regulated portable equipment include, but are not limited to abrasive blasters, air compressors, water pumps, welders, shredders, generators, pile drivers, tub grinders, drill rigs, concrete pumps, spray equipment, rock drills, wood chippers, or dredge pumps, which are driven by an internal combustion engine rated at 50 or more brake horsepower. The Contractor shall comply with all conditions listed in the permits and/or registrations and shall provide the Engineer a copy of the current permit or registration for all regulated portable equipment before it can be brought on site.

4. In Section 01060, insert the following Article 1.21 (including Paragraphs 1.21A through 1.21 E) after Paragraph 1.20E and renumber the succeeding articles accordingly: 1.21 DEWATERING

A. The Contractor shall obtain a NPDES Permit (Los Angeles Regional Water Quality Control Board – LARWQCB) and/or a MS-4 Permit for discharge of any hydrostatic testing, leak testing or disinfection water. Waters shall not be discharged to inland surface waters, including storm drains, or groundwater bodies, without first meeting the discharge requirements of the permit(s).

B. Disinfection water must be treated to achieve a 0.1PPM maximum chlorine residual before it is discharged. The Contractor shall comply with all permit requirements for treatment and discharge of waters used for disinfection of pipelines.

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C. Waters shall not be discharged into sanitary sewers or storm water drains without first obtaining permits required by all applicable agencies.

D. The Contractor shall obtain all permits and pay permit fees and inspection costs required by agencies and authorities having jurisdiction. The costs for the permits and inspections shall be included in the price entered in the Bidding Sheet.

E. When the terms of permits obtained by either the Contractor or Metropolitan require inspections by agencies or authorities other than Metropolitan, the Contractor shall schedule the inspections and notify the Engineer a minimum of 24 hours prior to the inspection being performed.

5. In Section 01060, after Paragraph 1.23A, insert the following Paragraph 1.23B (as amended in this addendum) and renumber the succeeding paragraphs accordingly: B. The Contractor shall obtain and pay the associated fees for a NPDES Permit (Los Angeles Regional Water

Quality Control Board – LARWQCB) and/or a MS-4 Permit for discharge of all concrete curing water, leak test water, hydrostatic testing water or disinfection water used in this project. The Contractor shall comply with all conditions specified in the permits.

6. Add Section 01445, “Manufacturer’s Field Services,” attached hereto, after Section 01400, “Inspection of the Work.

7. In 01500, “Construction Facilities and Temporary Controls,” subparagraph 1.11F.2, change the name and contact number for the Pomona Walnut Roland Feeder to read: Mr. Cregg Zimmerman or David Garcia Telephone No. (909) 595-1268

8. In Section 02618, “Field Installation of Fabricated Steel-Plate Pipe [K-Pipe],” Paragraphs 2.02A and 2.02B, change the acronyms “ANSI/NSF, EPA, FDA, or USDA” to read: ANSI/NSF 61

9. In Section 02618, subparagraph 3.03C.1, change the acronyms “ANSI/NSF, EPA, FDA, or USDA” to read: ANSI/NSF 61

10. In Section 02662, “Fabricated Steel-Plate Pipe [K-Pipe],” subparagraphs 2.06M.1 through 2.06M.3, change the acronyms “ANSI/NSF, EPA, FDA, or USDA” to read: ANSI/NSF 61

11. In Section 02683, “Disinfection of Water Systems,” Paragraph 3.06B, delete the last sentence, which begins: “The Contractor shall conform…”

12. In Section 02683, Paragraph 3.06C, at the end of the paragraph insert: … in accordance with Section 01060.

13. In Section 03300, “Cast-in-Place Concrete,” at the end of subparagraph 1.01F.2, add the following Paragraph 1.01G: G. ANSI/NSF 61, Drinking Water System Components – Health Effects

14. In Section 03300, at the end of subparagraph 1.02F.2, add the following Paragraph 1.02G: G. The Contractor shall provide ANSI/NSF 61 certification for products as specified herein when possible. If

no product has such certification, the Contractor shall submit a list of companies that were contacted trying to obtain a product with certification.

15. In Section 03300, at the end of subparagraph 2.02. A.3, add the following subparagraph 2.02A.4: 4. Cement that will come in contact with potable water or water that may be treated for use as potable water

shall be ANSI/NSF 61 certified”. 16. In Section 03300, at the end of subparagraph 2.06F.2, add the following Paragraph 2.06G:

G. Admixtures that will come in contact with potable water or water that may be treated for use as potable water shall be ANSI/NSF 61 certified”.

17. In Section 03300, subparagraph 2.07A.2.b, change the acronyms “ANSI/NSF, EPA, FDA, or USDA” to read: ANSI/NSF 61

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18. In Section 03300, subparagraph 3.15A.5, change the first sentence to read: Water used for testing shall be released or conveyed at limited rates of flow to the locations as defined in the Contractor-obtained NPDES Permit and/or MS-4 Permit with the concurrence of the Engineer (Refer to Section 01060).

19. In Section 03600, “Grout and Dry-Pack,” at the end of subparagraph 1.01C.1, add the following Paragraph 1.01D: D. ANSI/NSF 61, Drinking Water System Components – Health Effects

20. In Section 03600, at the end of Paragraph 1.02E, add the following Paragraph 1.02F: F. The Contractor shall provide ANSI/NSF 61 certification for products as specified herein when possible. If


21. In Section 03600, insert the following Paragraph 2.01A and renumber the succeeding paragraphs accordingly: A. Grouts that will come in contact with potable water or water that may be treated for use as potable water

shall be ANSI/NSF 61 certified 22. In Section 09870, “Mortar Lining and Coating,” at the end of Paragraph 1.01F, add the following

Paragraph 1.01G: G. ANSI/NSF 61, Drinking Water System Components – Health Effects

23. In Section 09870, at the end of subparagraph 1.02C.2, add the following Paragraph 1.02D: D. The Contractor shall provide ANSI/NSF 61 certification for products as specified herein when possible. If


24. In Section 09870, at the end of subparagraph 2.01. A.2, add the following subparagraph 2.01A.3: 3. Cement that will come in contact with potable water or water that may be treated for use as potable water

shall be ANSI/NSF 61 certified”. 25. In Section 09870, at the end of subparagraph 2.01F.5, add the following Paragraph 2.01F.6:

6. Admixtures that will come in contact with potable water or water that may be treated for use as potable water shall be ANSI/NSF 61 certified”.

26. In Section 09872, “Field-Applied Mortar Lining and Coating,” at the end of subparagraph 1.01C.1, add the following Paragraph 1.01D: D. ANSI/NSF 61, Drinking Water System Components – Health Effects

27. In Section 09872, at the end of subparagraph 1.02B.2, add the following Paragraph 1.02C: C. The Contractor shall provide ANSI/NSF 61 certification for products as specified herein when possible. If


28. In Section 09872, delete Paragraph 2.01B and replace with the following: B. Cement

1. Cement shall be Type II, low alkali, in accordance with ASTM C150. 2. Cement that will come in contact with potable water or water that may be treated for use as potable

water shall be ANSI/NSF 61 certified. 29. In Section 11211, “Horizontal Centrifugal Pumps,” at the end of subparagraph 1.01G.9, add the following

Paragraph 1.01H: H. ANSI/NSF 61, Drinking Water System Components – Health Effects

30. In Section 11211, at the end of subparagraph 1.02B.1, add the following Paragraph 1.02C: C. The Contractor shall provide ANSI/NSF 61 certification for products as specified herein when possible. If


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31. In Section 11211, subparagraph 2.01K.2, change the acronyms “ANSI/NSF, EPA, FDA, or USDA” to read: ANSI/NSF 61

32. In Section 11211, at the end of subparagraph 2.01K2, add the following Paragraph 2.01L: L. Pumps that will come in contact with potable water or water that may be treated for use as potable water

shall be ANSI/NSF 61 certified. 33. In Section 11212, “Vertical Turbine Pumps,” at the end of subparagraph 1.01H.2, add the following

Paragraph 1.01I: I. ANSI/NSF 61, Drinking Water System Components – Health Effects

34. In Section 11212, at the end of subparagraph 1.02A.8.e, add the following Paragraph 1.02B: B. The Contractor shall provide ANSI/NSF 61 certification for products as specified herein when possible. If


35. In Section 11212, insert the following Paragraph 2.01M and renumber the succeeding paragraphs accordingly: M. Pumps that will come in contact with potable water or water that may be treated for use as potable water

shall be ANSI/NSF 61 certified. 36. Delete Section 11282, “Fabricated Slide Gates,” in its entirety. 37. In Section 11291, “Drop Gates,” at the end of subparagraph 1.01B.10, add the following Paragraph 1.01C:

C. ANSI/NSF 61, Drinking Water System Components – Health Effects 38. In Section 11291, subparagraph 2.02F.2, change the acronyms “ANSI/NSF, EPA, FDA, or USDA” to read:

ANSI/NSF 61 39. In Section 11291, at the end of subparagraph 1.02A.2, add the following Paragraph 1.02B:

B. The Contractor shall provide ANSI/NSF 61 certification for products as specified herein when possible. If no product has such certification, the Contractor shall submit a list of companies that were contacted trying to obtain a product with certification.

40. Add Section 13124, “Fabricated Stainless Steel Slide Gate with Motor Operator,” attached hereto, after Section 11299, “Electric Actuators for Valves and Gates.”

41. In Section 13207, “Vertical Fiberglass Reinforced Plastic (FRP) Tanks,” at the end of subparagraph 1.01D.1, add the following Paragraph 1.01E: E. ANSI/NSF 61, Drinking Water System Components – Health Effects

42. In Section 13207, at the end of Paragraph 1.02D, add the following Paragraph 1.02E: E. The Contractor shall provide ANSI/NSF 61 certification for products as specified herein when possible. If


43. In Section 13207, at the end of Paragraph 2.01D, add the following Paragraph 2.01E: E. The FRP tanks shall meet the specifications herein, and when possible, shall be ANSI/NSF 61 certified.

44. In Section 13207, delete Paragraph 2.05.B and replace with the following:

B. The corrosion barrier shall have a minimum thickness of 100 mils. The inner surface shall consist of 20 mils minimum resin rich vinyl ester resin, reinforced with one ply of chemically resistant synthetic Nexus 100-10 Surfacing Veil. The remainder of the 100 mil corrosion barrier shall be vinyl ester resin reinforced with two plies of 1.5 ounce per square-foot Type “E” glass non-continuous (chopped) glass strand fiberglass mat.

45. In Section 13450, “Level Instruments,” to the end of Part 2, add the following Article 2.05: 2.05 CONDUCTANCE TYPE LEVEL SWITCH (FOR SULFURIC ACID)

A. General 1. A conductance-type level switch shall consist of a controller, fitting, reference probe, and set point

probe(s). The switch shall utilize the conductive property of a liquid to complete a circuit between the reference probe and the set point probe and cause a control relay to actuate.

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B. Controls 1. Controller shall utilize solid state controls employing two separate control circuits: one for sensing

and comparing current flow and the other for energizing the output relay. 2. Switch shall be DPDT. 3. Power supply voltage shall be 120VAC.

C. Fitting 1. The fitting shall be flange-mounted in accordance with the Drawings. 2. Body material shall be PVC. 3. Housing material shall be Polycarbonate.

D. Probe 1. Probes shall be wire suspended. Length of wire shall be in accordance with the Drawings. 2. Probe shield material shall be PVC. 3. Probe tip material shall be Hastelloy C.

E. The conductance-type level switch shall be manufactured by Warrick Series 3G with Series 3Y probes, or equal.

46. In Section 15060, “General Mechanical Piping ,” subparagraph 1.03E.4, change the acronyms “ANSI/NSF, EPA, FDA, or USDA” to read: ANSI/NSF 61

47. In Section 15080, “Poly (Vinyl Chloride) (PVC) Plastic Pipe and Fittings [D-Pipe],” Paragraph 2.01B, change the acronyms “ANSI/NSF, EPA, FDA, or USDA” to read: ANSI/NSF 61

48. In Section 15082, “Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe and Fittings [DD-Pipe],” at the end of subparagraph 1.01D.1, add the following Paragraph 1.01E: E. ANSI/NSF 61, Drinking Water System Components – Health Effects

49. In Section 15082, at the end of Paragraph 1.02C, add the following Paragraph 1.02D: D. The Contractor shall provide ANSI/NSF 61 certification for products as specified herein when possible. If


50. In Section 15082, subparagraph 2.01A.7c, change “NSF-approved” to read: NSF 61 certified. 51. In Section 15082, Paragraph 2.01B, change the acronyms “ANSI/NSF, EPA, FDA, or USDA” to read:

ANSI/NSF 61 52. In Section 15091, “Polyvinyl Chloride (PVC) Plastic Double-Wall Pipe and Fittings [BB-Pipe],” at the end of

subparagraph 1.01D.1, add the following Paragraph 1.01E: E. ANSI/NSF 61, Drinking Water System Components – Health Effects

53. In Section 15091, at the end of Paragraph 1.02D, add the following Paragraph 1.02E: E. The Contractor shall provide ANSI/NSF 61 certification for products as specified herein when possible. If


CHANGES TO DRAWINGS:

54. The following drawings have been revised, as shown on the prints of the attached drawings or provided in the CD in PDF format. These drawings as revised shall be controlling for the purposes of the required work in lieu of the drawings previously issued. The changes made on each drawing are indicated in the revision block on each drawing.

Reference Sheet Drawing Volume RevisionNo. No. No. No. No. 1 G-2 B-129162 4 2 2 G-3 B-129163 4 2

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Reference Sheet Drawing Volume RevisionNo. No. No. No. No. 3 G-4 B-129164 4 2 4 G-5 B-129165 4 1 5 G-6 B-129166 4 1 6 I-5 B-129465 5 2 7 I-43 B-129503 5 1 8 E-6 B-129536 5 1 9 E-7 B-129537 5 1 10 E-26 B-129556 5 2 11 1C-7 B-129607 5 2 12 1C-25 B-129630 5 2 13 1C-27 B-129632 5 1 14 1C-32 B-129637 5 2 15 1C-34 B-129639 5 1 16 1C-36 B-129641 5 1 17 1C-37 B-129642 5 1 18 1C-38 B-129643 5 1 19 1C-46 B-129651 5 2 20 1C-48 B-129653 5 2 21 1C-49 B-129654 5 2 22 1C-52 B-129661 5 1 23 1C-53 B-129662 5 2 24 1C-55 B-129672 5 2 25 1C-57 B-129674 5 1 26 1C-58 B-129675 5 2 27 1C-59 B-129676 5 2 28 1C-60 B-129677 5 1 29 1C-61 B-129678 5 2 30 1C-62 B-129679 5 1 31 1C-63 B-129680 5 1 32 1C-64 B-129681 5 2 33 1C-66 B-129684 5 1 34 1C-67 B-129685 5 1 35 1C-68 B-129686 5 2 36 1C-70 B-129688 5 1 37 1C-71 B-129689 5 1 38 1C-72 B-129690 5 1 39 1M-2 B-129802 5 1 40 1M-18 B-129813 5 1 41 1M-21 B-129821 5 1 42 1E-3 B-129843 5 2 43 1E-5 B-129845 5 1 44 1E-11 B-129851 5 1 45 1E-14 B-129854 5 1

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Reference Sheet Drawing Volume RevisionNo. No. No. No. No. 46 1E-17 B-129857 5 1 47 1E-31 B-129835 5 1 48 8E-1 B-130021 6 1

55. The following new drawings have been added to the contract drawings. Prints of the new drawings are attached

Reference No.

Sheet No.

Drawing No.

Volume No.

Description

1 E-8 B-16200 5 460 Volt Power – Single Line Diagram

2 1E-32 B-129836 5 Sulfuric Acid Tank Farm - Plan

3 1E-33 B-129837 5 Sulfuric Acid Tank Farm – Sections

4 8E-4 B-16137 6 Mixing and Settling Basins – Embedded Conduits – Sheet 7

56. The following reference drawing has been added to the contract drawings. A print of the reference drawing is attached

Reference No.

Sheet No.

Drawing No.

Volume No.

Description

1

2

-

-

B-15496

B-007276

7

7

Settling Basins Sections and Details

Turnout Structure Electrical Equipment

CHANGES TO CABLE & CONDUIT SCHEDULES:

57. The following Cable and Conduit Schedules have been revised, as shown on the attached prints or provided in the CD in PDF format. These schedules as revised shall be controlling for the purposes of the required work in lieu of the drawings previously issued. The changes made on each cable or conduit are indicated in the revision block.

Reference No. Description Rev.

Date Revision

1. MWD Cable Schedule Part 1 5/8/2009 1 2. MWD Conduit Schedule Part 1 5/8/2009 1

QUESTIONS AND CLARIFICATIONS:

Requests for clarification of details on the drawings or of provisions of the specifications have been identified. The questions with the appropriate Metropolitan responses are as follows:

(1) Question: What SBE/DVBE credit can we claim for 2nd tier subcontractors and suppliers?

Answer: Metropolitan counts 100% of the contract value for all SBEs and DVBEs at any tier.

(2) Question: In Section 13207, Paragraph 2.05.B calls out for 120 mil thick section and up to 3 plies of chopped strand. This seems to be over-designed if this tank is used as a water tank. Please confirm that the tank is used for water and if the corrosion barrier specified can be relaxed.

Answer: The tank will be used for the drainage of sample water. Section 13207 is revised in this addendum.

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(3) Question: Section 16110, Par. 2.09.D does not specify the NEMA VE 1 support spacing footage and load/span class. Please provide this information. What is the total footage of cable tray on this project?

Answer: This project does not require new cable trays; therefore support spacing and footage are not applicable.

(4) Question: Sheet 1S-23, Note 3 states, “concrete coating on all walls and bottom slab shall be per Specification 09900, Table 1.” Does the whole chemical trench get the coating or just the area shown in Section G? What approximate area needs to be coated?

Answer: Only the areas shown on the drawing detail need to be coated.

(5) Question: Per Note 3 on Sheet 1C-1, the Contractor needs to demolish the existing 18” RCPs located between existing Chlorine Building and new Tank Farm. Sheet 1C-36 does not show the existing pipe. Please clarify.

Answer: Sheet 1C-36 is revised in this addendum. Refer to the reference drawings noted in Sheet 1C-1 for locations of the pipeline.

(6) Question: Per Note 26 on Sheet 1C-1, the Contractor needs to demolish the existing electrical duct bank and sludge pipes. Sheets 1C-36 through 38 does not show the duct bank and pipes. Please provide information on the sizes of duct bank and pipes.

Answer: The sludge line is 6” diameter, and the connection of the new sludge line to the existing line is shown on Sheet 1C-37 Grid E-5. There are no existing drawings for this line. Refer to Sheet 2.9.1, Drawing B-16130 of Specifications 600 in the reference drawings for the size of the existing duct bank.

(7) Question: Section 11212 requires the pump Total Pump Length (TPL) to be 23’-4” with a pit depth of 25 feet. Sheet 7M-15 does not agree with the pump specifications which shows the pump TPL which is measured from below the discharge head to the suction, as being only 17’-6.5”. Do we have the correct drawing or is this a mistake?

Answer: The drawing and the specifications are both correct. The pump data sheet on Section 11212 shows the pumps for the finished water reservoir, domestic water pumps, not the washwater return pumps shown on Sheet 7M-15.

(8) Question: Sheet 1C-41, Grid B-3, references Drawing No. B-15496. This drawing does not seem to appear in the many reference drawings furnished in Volume 7 of the drawings. Please provide this drawing.

Answer: Reference Drawing B-15496 is included in this addendum.

(9) Question: Reference Section 02200, subparagraph 3.08E.1 and 3.08E.2. – Does the overexcavation and recompaction beneath foundations (24 inches) of structures and the lateral limits (horizontal distance of 3feet) apply to the shoring and excavation of the new inlet box conduit structure?

Answer: No, since the new inlet box conduit is embedded more than 5feet below the existing grade, Section 02200 Paragraph 3.08.F applies.

END OF ADDENDUM

January 31, 1997 01445 1633 (construction contract) Addendum 2

SECTION 01445 MANUFACTURER’S FIELD SERVICES

PART 1 GENERAL

1.01 MANUFACTURER'S FIELD REPRESENTATIVE

A. The Contractor shall provide for the services of manufacturer's representatives who shall:

1. Attend site at the request of the Engineer or Contractor to give advice on the properties, performance, storage and handling requirements, and installation of manufacturer's materials or equipment; resolve queries pertaining to the manufacturer's product; and attend meetings. The representative shall provide written reports to the Engineer as required.

2. Give training to the Contractor's installation crews in the proper installation procedures of the manufacturer's materials or equipment.

3. Inspect the installation as required by these specifications or requested by the Engineer to verify or certify that the materials, equipment, or installation are in accordance with the manufacturer's printed instructions and these specifications.

4. Give advice on the startup of equipment, carry out testing, and ensure that appropriate adjustments are made for proper operation of the installation

5. Give training to Metropolitan personnel in the operation and maintenance of installations of materials or equipment.

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION (NOT USED)

END OF SECTION

April 22, 2009 13124-1 1633 (construction contract) Addendum 2

SECTION 13124

FABRICATED STAINLESS SLIDE GATE WITH MOTOR OPERATOR

PART 1 GENERAL

1.01 DESCRIPTION

A. This section applies to fabricated stainless steel slide gates. The slide gate system shall be furnished with electric motor-operated control unit, wall thimble, stem, floor stand, stem guide brackets, stem housing, stem cover and all other appurtenances to make the system complete and operable.

1.02 REFERENCES

A. The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only. Where a date is given for reference standards, that edition shall be used. Where no date is given for reference standards, the latest edition available on the date of the Notice Inviting Bids shall be used.

B. American National Standards Institute (ANSI):

1. ANSI B46.1, Surface Texture (Surface Roughness, Waviness, and Lay).

2. ANSI/AWWA C-561, Standard for Fabricated Stainless Steel Slide Gates,

C. American Society of Mechanical Engineers (ASME):

1. ASME Boiler and Pressure Vessel Code (ASME BPVC): Section VIII, Rules for Construction of Pressure Vessels.

D. American Society for Testing and Materials (ASTM):

1. ASTM A36, Standard Specification for Carbon Structural Steel.

2. ASTM A193, Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service.

3. ASTM A194, Standard Specification for Carbon and Alloy-Steel Nuts for Bolts for High-Pressure and High-Temperature Service.

4. ASTM A240, Standard Specification for Heat-Resisting Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels.

5. ASTM A276, Standard Specification for Stainless Steel Bars and Shapes.

6. ASTM A312, Standard Specification for Seamless and Welded Austenitic Stainless Steel Pipe.

7. ASTM A351, Standard Specification for Castings, Austenitic, Austenitic-Ferritic (Duplex), for Pressure-Containing Parts.

8. ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products.

9. ASTM A380, Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems.

10. ASTM A473, Standard Specification for Stainless and Heat-Resisting Steel Forgings.

11. ASTM A479, Standard Specification for Stainless and Heat-Resisting Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels.

12. ASTM A564, Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes.

13. ASTM A743, Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application.

14. ASTM B30, Standard Specification for Copper-Base Alloys in Ingot Form.

15. ASTM B96, Standard Specification for Copper-Silicon Alloy Plate, Sheet, Strip, and Rolled Bar for General Purposes and Pressure Vessels.

16. ASTM B98, Standard Specification for Copper-Silicon Alloy Rod, Bar, and Shapes.

Fabricated Stainless Steel Slide Gate with Motor Operator

1633 13124-2 April 22, 2009 Addendum 2 (construction contract)

17. ASTM B139, Standard Specification for Phosphor Bronze Rod, Bar, and Shapes.

18. ASTM D1418, Standard Practice for Rubber and Rubber Lattices - Nomenclature.

19. ASTM D2000, Standard Classification System for Rubber Products in Automotive Applications (SAE Recommended Practice J200).

20. ASTM E165, Standard Method for Liquid Penetrant Examination.

E. American Welding Society (AWS).

F. International Organization for Standardization (ISO):

1. ISO 9001, Quality Systems - Model for Quality Assurance in Design, Development, Production, Installation and Servicing.

G. National Fire Protection Association (NFPA):

1. NFPA 70, National Electrical Code (NEC).

1.03 DEFINITIONS

A. Seating Head – shall be measured from the top surface of the water to the center of the gate, where head is pushing gate into thimble.

B. Unseating Head – shall be measured from the top surface of the water to the center of the gate, where head is pushing gate away from thimble.

1.04 SUBMITTALS

A. Calculations

1. Design calculations for the gate and actuator. The calculations shall identify the loading conditions, and shall verify that stresses and deformations will not impair operation, and are within specification requirements, under the most adverse operating condition. These calculations shall be stamped by a professional civil or mechanical engineer registered in the State of California.

2. Calculation shall include, but not be limited to, stem, coupling, thrust nut, thimble, gate slide stress, bolting, anchor, and actuator stand.

3. Seismic calculations shall be in accordance with Section 01640, “Seismic Design of Equipment and Equipment Anchorage.”

B. Drawings:

1. Slide gate information and drawings showing the materials and details of construction, including plate thicknesses, location of welded seams, welding details, machining and final fabrication details, machined surface finishes, dimensions, tolerances, and clearances.

2. Machined surface finishes shall be expressed in microinch roughness values in accordance with the requirements of ANSI B46.1.

3. Welding symbols shall be in accordance with AWS A2.4, Standard Symbols for Welding, Brazing, and Nondestructive Examination.

4. Materials for all parts shall be completely identified with the corresponding codes or serial numbers referring to the standards of ASTM or other standards recognized in the United States of America; provided that in the case of materials not covered by such standards, the chemical composition and mechanical properties of the materials shall be given.

5. The drawings shall include details of all mechanical and electrical connections, base requirements, and any details of assembled equipment that may be necessary for detailing installation drawings.

6. Assembly drawings shall accurately show in detail the assembly of all parts and shall indicate each component of the equipment by part number. The assembly drawing shall show the weight of each major component and the total weight and center of gravity of the assembly.

7. Parts or material lists shall fully describe each component.

8. Manufacturers' catalog, serial, or other reference numbers for all proprietary components shall be shown on the drawings or parts lists.



9. Drawing notes shall include sufficient detail to insure that all processing, fabricating, coating, inspecting, testing, and other requirements of the specifications will be adhered to in the procurement and manufacture of the equipment.

C. Weld procedures and welder qualifications

D. Coating procedures

E. Test Reports and Certifications

1. Complete certified reports on shop tests and clearances shall be submitted and approved by the Engineer before the slide gates are shipped.

2. Certified mill test reports shall be submitted showing the chemical composition and mechanical properties of materials that are used in the manufacture of the slide gate. Test reports shall be submitted prior to shipment of the slide gates.

F. Motor operated control unit information as specified in Section 11122, “Electric Actuators for Valves and Gates.”

G. Installation, Operations and Maintenance Manuals

1. Complete installation, operation and maintenance manuals shall be submitted and shall be in accordance with the requirements of Section 01730, “Operation and Maintenance Data.”

1.05 MANUFACTURER’S QUALIFICATION

A. The gate manufacturer shall have experience in the design of equipment which is in successful operation for a minimum of 5 years in North America and which is similar to the equipment required to be furnished. “Similar equipment” is defined as a minimum of five different projects that used gates of at least 96 inches by 96 inches dimensions with the features specified herein. For each project the project owner shall be listed with a contact name and number.

B. The gate manufacturer, for the machining and fabrication, shall utilize facilities that have experience in machining and fabrication of similar or larger size articles and has experience with complexity such as tolerancing and welding to AWS.

C. The Contractor shall bear the burden of proof that the proposed gate manufacturer and all manufacturing facilities meet the experience requirements. The Contractor shall submit documentation in quantity and form in accordance with Section 01300, “Submittals” to demonstrate that the gate manufacturing facilities listed meet the experience requirements hereinbefore specified. Metropolitan reserves the sole right to reject a manufacturer and/or manufacturing facility with inadequate experience with no consequence to any provision of the contract

1.06 QUALITY ASSURANCE

A. The Contractor shall ensure that the gate manufacturer is actively controlling and supervising the design, machining, fabrication, assembly and testing processes whenever it is using its own facilities or subcontracted facilities in the design, machining, fabrication, assembly and testing of the gate.

B. The Contractor shall submit a project-specific Quality Assurance Plan (QAP) to the Engineer for approval. The QAP shall be in accordance with ISO 9001. All aspects of design, manufacturing and testing of the gate shall be covered by the project-specific QAP. Additionally, the plan shall address how the Contractor plans on ensuring that its manufacturers and suppliers are adhering to the requirements of the specifications and the QAP.

C. The Contractor, its manufacturers and suppliers shall adhere to the QAP approved by the Engineer, and shall maintain complete records for tracing materials, products, and manufactured parts to their origins.

D. At all times during business hours, the Engineer shall have access to the offices and places of manufacture of the Contractor and its manufacturers and suppliers for the purposes of auditing the QAP.

1.07 SAFETY AND REGULATORY REQUIREMENTS

A. Safety Requirements:

1. All equipment furnished under the contract shall comply with the safety orders of the Division of Occupational Safety and Health of the State of California (Cal/OSHA) and the Safety and Health Regulations of the Bureau of Labor Standards of the United States Department of Labor. All rotating or moving equipment shall be guarded in metal safety enclosures in compliance with these safety orders.

B. Electrical Requirements:



1. All electrical work shall comply with the CCR, Title 8, Chapter 4, Subchapter 5, Electrical Safety Orders, and with the NEC.

1.08 UNIT RESPONSIBILITY

A. The Work requires that the fabricated stainless steel slide gate, complete with all accessories and appurtenances (including, but not necessarily limited to electric actuator, auxiliary gear units) be the end product of one responsible system manufacturer or responsible system supplier.

B. The Contractor shall identify an entity who shall have overall technical coordination and unit responsibility for ensuring that all furnished equipment shall operate as a single functioning system.

C. The entity having overall unit responsibility shall coordinate all systems. Unless otherwise indicated, Contractor shall obtain each system from responsible supplier of equipment. Supplier shall furnish all components and accessories of the system to enhance compatibility, ease of operation and maintenance, and as necessary to place the equipment in operation in conformance with the specified performance, features, and functions indicated without altering or modifying Contractor’s responsibilities under the Contract Documents. Contractor is responsible to Metropolitan for providing equipment systems as specified herein.

D. The duties of the entity having overall unit responsibility shall also include review of all sub vendors submittal prior to their submittal to the Engineer. Particular attention shall be given to the integration of all sub vendors components, logic and interfaces in the submittals.

1.09 INSPECTIONS

A. Inspection of the work shall be in accordance with Section 01400, “Inspection of the Work”, and as specified below.

B. Upon request by the Engineer, the Contractor shall submit a manufacturing schedule.

C. The Contractor shall give Metropolitan or Metropolitan's representative access to all Contractor and sub-Contractor facilities, during working hours, as is reasonable and necessary to determine the equipment to be supplied conforms to design, including specifications and drawings. Metropolitan or Metropolitan’s representative shall be allowed to observe all manufacturing processes. The Contractor and sub-Contractors shall furnish all the necessary apparatus, labor, and other facilities for the safe and convenient performance of inspections without cost to Metropolitan.

D. When requested by Metropolitan, the Contractor shall furnish Metropolitan additional information as may reasonably be required regarding the character of the materials and the progress of their procurement, including copies of invoices, bills of lading, and shipping lists on all articles and materials for use on the work.

E. Unidentified materials shall not be used in Contractor’s work, including work by subcontractors.

F. If witnessing of a test by Metropolitan is required the Data Sheet, the test shall be considered a Hold Point, unless waived by Metropolitan, and the Contractor shall notify Metropolitan of the test, two (2) weeks prior to the test. If equipment is not ready at time of scheduled testing, Metropolitan reserves the right to charge the Contractor for any additional cost incurred.

G. Neither inspection, waiving of inspection, nor Metropolitan's acceptance of the equipment shall relieve the Contractor of his obligation to furnish equipment in accordance with the specifications and drawings.

H. No equipment shall be shipped until all test reports and certifications have been approved by the Engineer.

1.10 PREPARATION FOR SHIPMENT

A. The Contractor shall prepare all equipment for shipment in such a manner as to protect it from damage in transit, and Contractor shall be responsible for and make good any and all damage due to improper preparation or loading for shipment.

B. All equipment shall be securely boxed and prepared for long-term outdoor storage of up to 2 years.

C. Manufacturer shall securely box or crate all equipment, or shall mount equipment on pallets and support it in a manner that will prevent damage during shipment and subsequent storage. Equipment shall be packaged so as not to rub or contact other equipment.

D. After the equipment has been prepared for shipping, each shipping unit shall be plainly marked by stencil or equivalent with the contract number, the schedule and item number, the piece mark number, weight, lifting points, and center of gravity.



E. When it is necessary to disassemble components for shipping, all uncoated machined surfaces to be exposed in such disassembly shall be coated with a suitable, easily removable, rust-preventive compound before shipping.

F. Equipment subject to deterioration due to moisture and dust shall be enclosed in heavy-duty, polyethylene envelopes together with dehumidifiers, to provide complete protection.

G. Manufacturer shall plug or cap all threaded openings with adequate thread protectors. All exposed process flanges shall have a plywood or equivalent type shipping cover, fabricated to match flange size and firmly attached to flange, to exclude foreign matter and prevent flange face damage.

H. Prior to shipment, Manufacturer shall mark and match mark all parts subject to disassembly for identification. Match marking information shall be submitted in the Installation, Operation, and Maintenance manual.

I. Manufacturer shall ensure that each individual piece of equipment shall bear a stainless steel nameplate attached with stainless steel screws, upon which there shall be engraved the following information:

1. Manufacturer’s name or trademark

2. Manufacturer’s model and serial number

3. Metropolitan tag number

4. Metropolitan Contract number

5. Equipment size and pressure rating

J. Manufacturer shall attach stainless steel warning plates with stainless steel screws to the equipment at all locations where metric bolting is used. Each plate shall have engraved on it a warning that metric bolting is used at the location identified on the plate.

K. Nameplates shall also be provided for identification of all panel-mounted devices and all enclosures. Nameplates shall be 3/32-inch thick, black and white, laminated bakelite with engraved inscriptions. The letters shall be white against a black background, sized and inscribed to suit the designations to be submitted to Metropolitan for review. Edges of the nameplates shall be beveled and smooth. Nameplates with chipped or rough edges will not be acceptable. Dials, gauges, and nameplates shall be marked with the nomenclature and units of measure used in the English Units (foot, pounds, second) and a schedule of such markings shall be submitted to the Engineer for review.

L. Weighing: The Contractor and/or manufacturer shall weigh the finished shipping assembly of each major item and shall report the weights, exclusive of boxes, crates, or pallets, to the Engineer.

1.11 DELIVERY, STORAGE, AND HANDLING

A. Handling and shipping from the factory to the site shall be the Contractor's responsibility, in accordance with Section 01610, “Delivery, Storage, and Handling” and as specified herein.

B. All components which may be subject to damage from vibration or jarring during shipment shall be securely blocked or otherwise supported in a manner which will prevent damage. Ground shipment shall be made in trucks or "shock control" type railway cars.

C. All mechanical and electrical equipment shall be coated, wrapped and otherwise protected from snow, rain, drippings of any sort, dust, dirt, mud, flood and condensed water vapor during shipment and while installed in place during construction. The protective coverings shall remain in place until the work areas are substantially free of all construction dust and debris. Space heaters for generators, actuator limit switch compartments, motor and other equipment shall be energized at all times during storage.

D. Any gate and components that are furnished under the contract but not required to be installed as part of the work shall be delivered to a Metropolitan-designated storage facility.

E. The Contractor shall also provide instructions and lubricants for dry storage of gates and components for a 2-year period as specified herein. Storage procedures shall be submitted to the Engineer for review prior to shipment of equipment.

F. All equipment, material and spare parts shall be shipped complete except where partial disassembly is required by transportation regulations or for protection of components.

G. The Contractor shall provide the Engineer, at least 30 days in advance of the equipment transfer, the dimensions and weight of each box or package containing the gate and components.



1.12 GUARANTY

A. The guarantee for all work, including materials, articles and equipment furnished by the Contractor as specified in this section, shall be in accordance with Section 01740, “Guarantee and Warranty”.

1.13 MAINTENANCE

A. Special Tools and Spare Parts

1. The Contractor shall furnish a set of all special tools, for normal operation and maintenance with each different type of equipment. Tools shall be packed in lockable steel cases clearly identified as "SPECIAL TOOLS FOR STAINLESS STEEL SLIDE GATE" with indelible markings on the exterior. The Contractor shall provide the Engineer with 4 copies of each key. All cases from each Supplier shall be keyed alike.

2. The Contractor shall furnish all spare parts as noted below and additionally as recommended by the manufacturer of each piece of equipment, including control panels, for the normal operation and maintenance of the equipment. Spare parts shall be clearly labeled "SPARE PARTS FOR STAINLESS STEEL SLIDE GATE" and packaged separately from equipment and parts to be installed during construction and separately from tools.

3. Spare parts and tools shall be packaged to prevent damage during extended periods of storage. All packages shall be legibly and properly identified with indelible markings on the exterior identifying the project and a listing of the contents, with a copy fastened to the inside of the packaging/containers.

B. The spare parts indicated below shall be furnished with the gate as a minimum. Spare parts shall be interchangeable with and shall be made of the same materials and workmanship as the corresponding gate part. Each spare part shall be plainly marked to facilitate checking at the delivery point and proper identification later when required for installation. 1. Two complete sets of all packing.

PART 2 PRODUCTS 2.01 GENERAL

A. WORKMANSHIP:

1. All work shall be done and completed in accordance with applicable codes and recognized industry standards and shall follow the best modern manufacturing practice, notwithstanding any omission from these specifications. All work shall be performed by mechanics skilled in their trades, and wherever possible all parts shall be made accurately to standard gage to facilitate replacement and repair. Machine work shall in all cases be of high-grade workmanship and finish. Bolt holes on surfaces not otherwise machined shall be spot-faced and all exposed surfaces shall be neat in appearance. All sharp edges, burrs, and unnecessary projections shall be removed. All unmachined corners shall be ground smooth, and all machined corners shall be beveled, unless otherwise shown on the drawings.

2.02 DESIGN REQUIREMENTS

A. The Contractor shall assume full responsibility for the design, fabrication, manufacturing, inspection, shop testing, and furnishing of the gates and actuators in accordance with the specifications, data sheet, and drawings. The design stresses and factors of safety used throughout the design shall be proven in practice and the design stresses shall be lower than specified herein, especially in the design of all parts to be subjected to intermittent or alternating stresses, or to shock.

B. Anchorages supporting and restraining parts shall be as specified in Section 01640, “Seismic Design of Equipment and Equipment Anchorage.

C. Slide gate operating thrust shall be calculated by the manufacturer using his standard values; however, method shall comply with good engineering and industry practice and as specified below.

1. When calculating torque to thrust factors, the stem ACME thread friction factor shall be 0.2.

2. When calculating thrust requirements, UHMWPE seal coefficient for friction shall be 0.2 or greater.

D. All parts subject to periodic renewal shall be readily accessible with minimum dismantling of the equipment involved. The parts shall be designed to prevent vibration during operation under the conditions specified.

E. Gates shall be in accordance with ANSI/AWWA C561, except where modified herein.

F. Design Stresses



1. The maximum unit tensile or compressive stress in any material under the worst case condition, except where otherwise specified, shall not exceed 33 percent of the minimum yield strength nor 20 percent of the minimum ultimate strength required by the applicable specification for the material, whichever is less. Allowable shear and torsional stress shall be 50% of allowable tensile or compressive stress. Consideration for determination of worst case condition shall include all operating conditions, such as maximum pressures, vibration, and actuator forces at maximum hydraulic pressure. At actuator stall conditions, tensile or compressive stress shall not exceed 75% of material yield, or 37% of material yield for shear and torsional stresses.

2. The stem shall have a buckling safety factor of 1.5 at the actuator thrust output in the stall condition. The stem slenderness ratio (length/radius of gyration) shall not be greater than 200.

3. The thrust nut and stem block shall withstand the thrust developed during gate operation in both opening and closing directions, under the maximum operating conditions, and with the specified safety factors.

2.03 PERFORMANCE REQUIREMENTS

A. The gate will be used for isolation and modulating at all flow rates up to the maximum design flow rate.

B. The gate shall be capable of opening and closing against an unbalanced pressure equal to the maximum seating and unseating heads.

C. The gate size, design pressure dimensional requirements and other operating requirements are indicated on the data sheet, equipment list and drawings.

2.04 GATE MATERIALS

A. General - All materials to be used in the manufacture of the equipment shall be in accordance with standard industry practice and as specified herein, of first class commercial quality, new, free from defects, imperfections and per classifications or grades designated in the specifications. In the event the Contractor decides to use materials not conforming to or not covered by said specifications or other requirements set forth herein, but of equal or higher quality for the purpose, he shall submit to the Engineer for approval complete specifications for the materials he proposes to use and a statement of the parts to be manufactured from said materials. In addition to ASTM standards, other standards can be used after establishing equivalency to Metropolitan satisfaction. Copies in English of standards to be used shall be submitted within 60 calendar days after Notice to Proceed.

B. Materials not included under detailed specifications herein shall be high-grade materials best suited to the purpose for which they are used, and shall be subject to approval by the Engineer.

C. Castings shall be sound and free of shrink holes, blow holes, cracks, scale, blisters, and other similar injurious defects. Castings in pressure service shall not be repaired by peening, plugging, burning in, or impregnating. The wall thickness and other dimensions of the castings shall not be less than those called for on the drawings by an amount sufficient, in the opinion of the Engineer, to reduce the strength of castings by more than 10 percent or to permit the stresses allowed under the specifications to be exceeded. Castings shall not be warped or distorted, nor shall their dimensions be oversized to such an extent as to interfere with proper fit with other parts of the apparatus.

D. Plate shall be ordered by thickness with a maximum allowable variation conforming to ASTM A20. Any laminations or other defects in the plate shall be cause for rejection where, in the opinion of the Engineer, such laminations or defects will impair the quality of the metalwork.

E. Cold working of steel plates, to obtain specified tensile requirements, will not be permitted.

F. Ready finished shafting shall be turned, ground, and polished. Custom finished shafting shall be finish machined.

G. Metropolitan reserves the right to select, test, and analyze, at the expense of Metropolitan additional test specimens of any or all of the materials to be used. Results of such tests and analyses shall be considered with the results of test and analyses made by the Contractor to determine compliance with the applicable specifications.

H. Materials shall be in accordance with ANSI/AWWA C561, except where modified herein:

1. Gate, frames, slides, guides, stiffeners, self contained frames, stem guides, mounting brackets, stems, stem extensions, couplings and thimbles shall be stainless steel as follows:

a. Stainless steel plate, sheet and strip shall conform to the requirements of ASTM Standard A 240, type 316L. Heating of stainless steel for shaping, forming, or straightening, will not be permitted.

b. Stainless steel bars and shapes shall conform to the requirements of ASTM Standard A 276, type 316L .



c. Age hardening stainless steel bars shall conform to the requirements of ASTM Standard A 564, type 630. Heat treatment condition shall be recommended by the contractor for the engineer’s approval.

2. Lift nut shall be made of manganese bronze ASTM B584 Alloy UNS No. 86300.

3. Thrust nut shall be bronze.

4. Frame gasket shall be EPDM.

5. Gate side seal shall be:

a. UHMWPE per ASTM D4020.

b. Rubber per ASTM D2000.

6. Gate bottom seal shall be rubber, EPDM, or equal.

7. Bolting

a. All wetted bolting or bolting in a continuously moist environment shall be stainless steel or “Everdur” unless otherwise noted. Stainless steel Components shall have stainless steel bolting unless otherwise noted.

b. All steel bolts, studs, and cap screws shall conform to the requirements of ASTM Standard A 193, grade B7, with the nuts conforming to the requirements of ASTM Standard A 194, grade 1 or grade 2H, except that the requirements specified herein shall control where at variance with said ASTM standards.

c. The threads in holes tapped for studs, shall be medium fit (class 3). All other threads shall be free fit (class 2).

d. Studs shall be of such lengths that not less than 1/4-inch nor more than 1/2-inch will project through the nut when drawn tight.

e. All bolts, studs, or cap screws used in tapped holes of equal strength material shall be of sufficient length to provide an engaged length of the threaded portion of not less than the nominal diameter. All bolt heads and nuts shall be hexagonal, heavy series, except where special shapes are required

f. All stainless steel bolts, studs, and cap screws shall conform to the requirements of ASTM Standard A 193, grade B8M, type 316, with the nuts conforming to the requirements of ASTM Standard A 194-84a, grade 8M, and to the special requirements of paragraph (a). Before assembly, all threaded portions of stainless steel bolts, studs and cap screws shall be coated with a anti-seize lubricant.

g. All age-hardened stainless steel cap screws, studs and nuts shall conform to the requirements of ASTM Standard A 564, type 630. Heat treatment shall be age-hardened treatment 1100°F.

h. All copper-silicon alloy (Everdur) studs, stud nuts and round head machine screws shall be of ASTM Standard B 98 copper alloy No. C65100, temper H04; and flat head machine screws shall be of alloy No. C66100, temper H04. The stud and stud nut shape and thread configuration shall conform to the requirements of ASTM Standards A 193 and A 194 and to the special requirements of paragraph (a). The round head and flat head machine screw shape and thread configuration shall conform to the requirements of ANSI B18.6.3.

i. Metric bolting of equal quality will be acceptable for all connection entirely within the equipment. Metric bolting shall not be used for connections to foundation or to equipment supplied by others.

j. Higher strength bolting, when approved by the Engineer, shall be in accordance with ASTM A193, Type 316, Class 2 Grade B8M for bolts, studs and cap screws. Accompanying nuts shall be stainless steel in accordance with ASTM A194, Type 316 or Nitronics 60, Class 2 Grade 8M or 8S.

k. Before assemble, threaded portions of stainless steel bolts, studs and cap screws shall be coated with lubricant. Acceptable products are Ramaco, TRX-Synlube; Ramaco, Anti-seize; Husky-ITT, Lube O’Seal; or equal.

2.05 COMPONENT DESIGN

A. General

1. All structural components shall be fabricated stainless steel having a minimum thickness of 1/4-inch and shall have adequate strength to prevent distortion during normal handling, during installation and while in service.



B. Frame

1. The clear opening shall be the same size as the waterway, unless otherwise specified.

2. Frame design shall allow for embedded mounting, mounting directly to a wall with stainless steel anchor bolts with grout or EPDM gasket, or mounting to a wall thimble with stainless steel mounting studs and an EPDM gasket material. Mounting style shall be as shown on the Data Sheet.

3. The frame and seat/seal shall extend to accommodate the entire height of the slide when the slide is in the fully closed or fully opened position.

4. A rigid stainless steel top seal member shall be provided across the top of the opening on gates designed to cover submerged openings.

C. Seat and Seals

1. The side and top seat/seal design shall be self-adjusting and shall consist of a primary seat material and a secondary seat material.

a. The primary seat/seal material shall be UHMWPE and shall prevent the slide from coming in contact with the guide/frame.

b. The secondary seat/seal material shall be rubber or equal. It shall be between the UHMWPE and the frame/guide, and shall keep the UHMWPE in contact with the slide. The secondary seat/seal material shall not come in contact with the slide.

2. The top seat shall consist of a primary seat material and a secondary seat material. The primary seat material shall be UHMWPE and shall prevent the slide from coming in contact with the frame. The secondary seat material shall be rubber or equal and shall keep the UHMWPE in contact with the slide.

3. Gate bottom seal shall be conventional-closure or flush-bottom as specified on Data Sheet. For conventional closure type top of seal shall be same elevation as thimble invert.

4. All seals/seats must be bolted or otherwise mechanically fastened to the frame or slide. Arrangement with seals that are force fit or held in place with adhesives are unacceptable.

5. Gates that utilize rubber “J” seals or “P” seals are not acceptable.

D. Yoke

1. Gate shall be non self contained or self contained as shown on the data sheet. Self contained gates shall have a heavy structure stainless steel yoke that is bolted to machined pads provided on the upper ends of the vertical frame members. The yoke shall have a machined surface for attaching the actuator or pedestal mounting plate. The yoke and frame shall be design to withstand the stall thrust of the actuator per Design Requirement article hereinabove.

E. Wall Thimble

1. The wall thimble shall be manufactured from 316L stainless steel plates and bars unless otherwise shown on the Drawings. Wall thimble depth shall be equal to the depth of the wall plus 20 inches, with plain-end pipe section for connection to adjacent piping, as shown on the drawings and Data Sheet. The thimble shall be sufficiently rigid to prevent distortion during installation.

2. To permit entrapped air to escape as the thimble is being encased in concrete, vent holes shall be provided in each air entrapment area formed by the reinforcing ribs or other members. Vent holes shall be 1-1/2 inches in diameter and no more than 2 feet apart.

3. Tapped holes in the thimble shall have a cap attached on the concrete side to prevent entrance of concrete.

4. Anchor bolts shall be stainless steel. A water stop and thrust collar (sized by the Contractor) shall be located as shown on the drawings.

5. Coupling nuts in the design of the thimble shall not be used unless approved by the Engineer.

6. The top of the thimble flange shall be permanently marked top.

F. Stem

1. The stems shall be solid 316 stainless steel. Stem threads shall be of the self locking ACME design. Sections of stems shall not be welded together. A top and bottom bronze stop collar shall be provided.



2. The stem shall be threaded to allow full travel of the slide. Threads on the gate operating stems shall be cut to a thread gage to insure interchangeability.

3. Stem couplings shall be 316 stainless steel. Couplings shall be two-piece type (2 halves bolted together), grooved and keyed to the stem and shall be of greater strength than the stem. Thrust nut shall be bronze. The thrust nut shall be threaded and keyed or threaded and pinned to the stem. Coupling and thrust nut keys and pins shall be 316 stainless steel or age hardened stainless steel.

4. When specified on the Data Sheet a bellows-style rubber cover shall be provided for the threaded portion of the stem exposed to water. The cover shall be fabricated from EPDM or other approved material.

5. Gates having a width greater than two times their height shall be provided with two lifting mechanisms connected by a tandem shaft.

G. Stem guide

1. Stem guide brackets shall be 316L stainless steel. Bracket shall be heavy-duty type, attached to the wall by sufficient stainless steel anchor bolts to prevent twisting or sagging under load.

2. Guide bearings shall be split. Guide bearings shall be Ultrahigh-molecular-weight-polyethylene, UHMWPE. Guides shall be spaced such that the slenderness ration (length between bearing/stem radius of gyration) shall not exceed 200.

3. No guides shall be located on the threaded portion of the stem unless specified otherwise in data sheet.

H. Gate side and top seat/seal shall be:

1. UHMWPE per ASTM D4020.

2. Rubber per ASTM D2000.

2.06 WELDING

A. Welding shall be in accordance with Section 05500, “Miscellaneous Metals.” In addition, gates shall be welded using the welding process described in AWS D1.6 and ASME Welding Code- Section IX. Welding processes and welders shall be qualified and maintained as required AWS D 1.6 section 4.

2.07 ELECTRIC MOTOR OPERATED CONTROL UNIT

A. Each electric motor operated actuator shall consist of an electric motor, a helical and worm gear train, an operating nut for operating a rising stem, a thrust limiting switch, adjustable limit switches, a handwheel for manual operation, and an external position indicator.

B. The control unit shall be housed in a suitable case with a drilled flange for mounting.

C. If required, a supplemental gear-reduction unit, in addition to the gear-reduction unit in the control unit may be supplied; provided that the supplemental gear-reduction unit shall comply with all applicable requirements specified herein for similar gearing and housings and shall be manufactured by the electric motor-operated actuator manufacturer.

D. The electric motor operated control unit shall be of the type shown on the Data Sheet or Equipment List and shall be in accordance with Section 11122, “Electric Actuators for Valves and Gates” and as specified herein.

E. All bolted connections between the actuator and connecting components shall be dowelled with not less than 2 dowels. Pilot dowel holes shall be drilled in the actuator mounting plate at accessible locations so dowel holes can be drilled in the field by others. Dowel pins shall be provided with the actuator.

F. Each stem operating nut shall be made of manganese-bronze or aluminum-bronze. Stem lifting nuts shall be threaded for ACME, left hand, sized for speed and thrust.

G. The actuator stand shall be stainless steel with a minimum 4 inch wide by 6 inch high access opening. The opening shall have a gasketed cover with at least four mounting screws.

H. A weatherproof stem cover with threaded pipe fitting for attaching to the actuator to protect the stem above the actuator shall be provided per AWWA C561. Stem cover shall be fabricated from Schedule 80 PVC with a 1/4-inch vent hole on the side at the top and bottom.

2.08 COATING

A. Coating shall be in accordance with Section 09900, “Painting”



2.09 SOURCE QUALITY CONTROL

A. The Contractor shall submit a detailed test procedure for review by Metropolitan 90 days prior to testing. Test procedures shall include performance, limit and torque switch settings, and leakage tests.

B. Each slide gate shall be completely assembled including thimble, with the parts doweled where required to assure correct assembly in the field. All seating surfaces shall be cleaned thoroughly of all foreign materials and final adjustments shall be made.

C. The slide gate shall then be operated in the shop from the fully closed to the fully open positions to verify that the assembly is functional. The slide shall be opened and closed at least 3 times to assure correct alignment, adjustment, and for proper seat sealing.

D. The gate manufacturer shall perform a shop seat leakage test in the unseating directions. Leakage shall not exceed value shown in AWWA C561.

E. All limit switches and torque limiting devices shall be set and checked for proper operation in the shop.

F. The Contractor shall provide Metropolitan a minimum of 14 days advanced notice of gate testing so that it can be witnessed. No test shall be performed without being witnessed by Metropolitan.

G. After the slide gates have been approved for shipment, the Contractor shall forward to Metropolitan the ring and plug gages used for ACME screw thread cutting. The ring and plug gages will become the property of Metropolitan.

H. After shop fabrication all stainless steel shall be pickled and passivated in accordance with ASTM A380.

PART 3 EXECUTION

3.01 INSTALLATION

A. Equipment shall be located and installed as specified and as shown on the drawings and in accordance with the manufacturer’s written instructions.

B. The Contractor shall furnish all necessary materials, tools, and labor required for complete installation and alignment of equipment.

C. Stems, stem cover, gearing and lifting mechanisms shall be thoroughly cleaned of grit, sand and other foreign material prior to testing and before installation of the covers

3.02 FIELD QUALITY CONTROL

A. After installation, each gate with its electric motor actuator and appurtenances shall be tested.

B. The Contractor shall submit a detailed test procedure for review by Metropolitan 90 days prior to testing.

C. The Contractor shall coordinate and manage the overall testing.

D. The Contractor shall perform the necessary work to assist the Engineer to conduct required tests on all equipment, systems, and sub systems. These tests shall meet all requirements specified in other sections and as set forth by the equipment manufacturers. All such tests shall be scheduled in advance to afford opportunity for the Engineer to assist in conducting the tests. The Contractor shall provide the Engineer and manufacturer’s representatives with labor and equipment.

E. The Contractor shall provide supervisors, skilled craftsmen, labor, equipment, and materials required to perform tests. The supervisors shall be available to the Engineer at all times during testing and shall attend all startup meetings.

F. Metropolitan plant operators will operate equipment where operation of the equipment will cause water discharge out of or into Metropolitan’s distribution system.

G. The Contractor shall prepare all the equipment and facilities for operation including final checkout of the supporting system and assisting manufacturer’s representatives as set forth in the field installation, testing and operation procedures provided by the manufactures of all Contractor-furnished equipment.

H. The Contractor shall make adjustments, repairs, and corrections to all equipment as required with Engineer’s approval.

I. All parts subject to wear shall be inspected and accepted by the Engineer after completion of field testing. Maintenance items shall be replaced or returned to an “as new” condition as required by the Engineer.



J. Leakage Test: At the maximum seating head and unseating head, or highest head available at time of test, the maximum allowable leakage rate past the gate shall be per AWWA C561.

K. Operating Test: Gates shall be cycled open and close three times to confirm proper operation. As a minimum, the following checks shall be performed:

1. Stops will be checked.

2. All limit switches will be checked.

3. Maximum current, and voltage input will be measured.

4. Maximum and minimum time of operation will be recorded.

3.03 SERVICES OF ERECTING AND STARTUP ENGINEERS

A. Contractor shall provide services of erecting engineer in accordance with Section 01445, “Manufacturers’ Field Services” and this specification.

B. The Contractor shall have at site during the entire installation period a qualified erecting engineer from the manufacturer who shall check the erection, installation, testing of the work at the work site. The erecting engineer shall check the installation in reference to alignments, clearances and adjustments, and all other matters pertaining to the quality of the installation. All notices or instructions shall be communicated to the Engineer. The erecting engineer shall be competent, reliable, responsible, and fluent English speaking and shall be preapproved by the Engineer.

C. The Contractor shall have at the site qualified gate and actuator startup engineer to confirm proper installation, electrical connections, limit switch and torque switch settings, and proper operation. The startup engineers shall be competent, reliable, responsible, and fluent English speaking and shall be preapproved by the Engineer.

3.04 DATA SHEET

A. The Data Sheet listed below, following “End of Section” is part of this specification.

1. Data Sheet

Number Title

13124-13 to 14 Fabricated Stainless Steel Slide Gate with Motor Operator Data Sheet

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Project Number: By: Ck by: Date: Rev No.:

FABRICATED STAINLESS STEEL SLIDE GATE WITH MOTOR OPERATOR DATA SHEET

Vendor to fill in all blanks Project: Weymouth F.P. Inlet Conduit Relocation and Rapid Mix System

Location: F. E. Weymouth Water Treatment Plant

Tag No(s): 7-G-51, 7-G-53, 8-G-101, 8-G-103 Service: Raw Water / Ozonated Water

No. Gates required: 4 Actuator Type: / Model #:

Gate Mfr.:

Model Size (inches): Pipeline: Station:

OPERATING CONDITIONS

Liquid: Untreated Water Flow Rated (cfs):

Centerline gate elev. (ft): 1087.09 Max. seating water surf. elev. (ft): 1096.0 Max. unseating water surf. elev. (ft): 1095.8

Seating head (ft): 8.91 Unseating head (ft): 8.71 Throttling Conditions: Yes

DESIGN REQUIREMENTS

Gate Opening Width (in): 96 Gate Opening Height (in): 96

Self Contained Yes No Rising Stem Yes No Gate Mounting: [Note 1]

Actuator Floor elev. (ft): Gate Stroke (in): 96 Gate Speed (in/minute):

Stem Diameter (in.): Stem Length (in.): Stem Threaded Length (in): RH LH

Thread Type: Cut ACME Thread Size: Qty Leads:

Slide Wt (lbs): Stem Wt (lbs): Frame Wt (lbs): Thimble Wt (lbs):

MATERIALS Slide: Side Seat (primary): Side Seat (secondary):

Top Seat (primary): Top Seat (secondary): Bottom Seal:

Frame: Frame Gasket: Bellows Stem Cover:

Stem: Gate/frame Bolting: Stem Coupling:

Thimble: Gate/frame Nuts: Thrust Nut:

Anchor Bolts: Anchor Bolt Nuts: Stop Nuts:

Actuator Pedestal: Pedestal Support: Stem Guide Brackets:

OPERATING MECHANISM

Required Gate Thrust (lbs): Rated Output Thrust (lbs): Stall thrust (lbs):

Overall Gear Ratio: Overall Gear Eff. (%):

Electric Actuator Control Unit

Rated output torque (ft-lbs): Output RPM: Gear Ratio:

Motor Rating (Hp): Volts: 460 Phase: 3 Hz.: 60



Project Number: By: Ck by: Date: Rev No.:

FABRICATED STAINLESS STEEL SLIDE GATE WITH MOTOR OPERATOR DATA SHEET

Operating Mechanism Coating:

Project: Weymouth F.P. Inlet Conduit Relocation and Rapid Mix System

Location: F. E. Weymouth Water Treatment Plant

Tag No(s): Service:

Gate Mfr.: Actuator Type:

REQUIRED SHOP WITNESS TESTING

Shop Inspection: Leakage Test:

Shop assembly:

Applicable to: Proposal As Purchased As Built

Notes:

1. Thimble to be provided by gate supplier.

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