AUGUST 17, 2016 ADDENDUM NO. 5 FOR I-190 LIFT STATION ...

Addendum No. 5 Specification No. 156080 of 6

AUGUST 17, 2016

ADDENDUM NO. 5

FOR

I-190 LIFT STATION REPLACEMENT

SPECIFICATION NO. 156080

For which Proposals were due in the office of the Chief Procurement Officer, Department of Procurement Services, City Hall, 121 N. LaSalle Street, Bid & Bond Room 103, Chicago, IL 60602 at 11:00 a.m., Central Time, on August 23, 2016. The following additions and revisions are incorporated into the above-referenced Specification (the "Contract Documents") as noted. All other provisions and requirements as originally set forth, except as amended by previous Addenda, remain in full force and are binding. Any additional work required by this Addendum shall conform to the applicable provisions of the original Contract Documents. BIDDER WILL ACKNOWLEDGE RECEIPT OF THIS ADDENDUM IN THE SPACE PROVIDED ON THE PROPOSAL EXECUTION PAGE. BID OPENING HAS BEEN POSTPONED TO AUGUST 29, 2016 1. The Bid Opening Date has been postponed to August 29, 2016. For which Bids are due in the Department of

Procurement Services, Bid & Bond Room, Room 103, City Hall, 121 N. LaSalle Street, Chicago, Illinois, 60602, at 11:00 a.m., Central Time

2. Incorporate the following revised Technical Specifications into the Contract Documents (see Addendum #5 –

Attachment A): SPECIFICATION NO. SPECIFICATION TITLE SECTION 15400 PLUMBING AND DRAINAGE SYSTEMS SECTION 15540 PUMPS

3. Incorporate the following revised drawings into the Contract Documents (see Addendum #5 – Attachment B): DRAWING SHEET NO. SHEET TITLE G-100 COVER SHEET MP-201 PROPOSED MECHANICAL PLAN – SECTION VIEWS


4. The following questions and requests for clarification were submitted in accordance with the instructions provided in the Contract Documents. The City’s response (in bold italics) follows each question or request for clarification in the table below:

RESPONSES TO QUESTIONS AND REQUESTS FOR CLARIFICATIONS

Question 1: The attached E-203 drawing [to Addendum No. 3] is indicating a different pump/piping arrangement than what’s indicated on the original MP201 drawing. We’ll need to know what the pump vendors plan on furnishing.

Response: The pump submitted must meet the performance requirements shown in the Pump Schedule on Drawing Sheet No. MP-204 with the configuration shown on the mechanical drawings.

Question 2: When looking at the revised drawings it shows a dry pit pump with line shafting and motor mounted on top on drawing E-203. However the spec clearly identifies a dry-pit submersible pump. Also drawing E-203 is in conflict with the MP drawings. Are there any other drawings that were modified, specifically MP-201 thru MP-203?

Response: Specification 15540 has been revised to remove conflicting requirements regarding submersible and dry-pit type pumps. The pump submitted must meet the performance requirements shown in the Pump Schedule on Drawing Sheet No. MP-204 with the configuration shown on the mechanical drawings. (See attached revised Specification 15540)

Question 3: Also the engineer needs to clarify the Pump Schedule on page MP-204. These are constant speed pumps therefore the pump can operate from 43’ -20’ however cannot provide a flowrate of 10,000 GPM throughout that range. The pump must have a rated point for example at 10,000 GPM at 43’ or 10,000 GPM at 20’ or somewhere in between.

Response: Pump rating point shall meet the GPM and head requirements shown in the Pump Schedule on Drawing Sheet No. MP-204.

Question 4: I am in receipt of Add #3 but still need clarification of what type of pumping equipment is required as identified in Section 15540 and drawings MP-201 thru MP203 and E-203. The spec section 15540 and drawings are conflicting. My specific questions are as follows: a. Please identify what type of pumps are required for this project, Dry-Pit Submersible style pumps or Dry-Pit Line shaft type pumps as shown on drawing E-203. b. Can you please clarify the rating point of these pumps as shown on the Pump Schedule on Drawing MP-204? Since the pumps are constant speed please identify specifically at what head condition is the pump supposed to produce 10,000 GPM. Based on the answers above I may have further questions regarding piping layout as shown on MP drawings and E drawings as well questions related to Section 15540.

Response: a. Specification 15540 has been revised to remove conflicting requirements regarding submersible and dry-pit type pumps. The pump submitted must meet the performance requirements shown in the Pump Schedule on Drawing Sheet No. MP-204 with the configuration shown on the mechanical drawings.

b. Pump rating point shall meet the GPM and head requirements shown in the Pump Schedule on Drawing Sheet No. MP-204.


Question 5: Pump discharge piping appears to be drawn as welded carbon steel pipe. I can’t find an applicable specification in the contract documents. If it is intended to be welded steel we need a pipe specification, wall thickness, welding requirements, linings/coatings, etc to accurately price the work.

Response: See attached revised Specification 15400.

Question 6: Valve specification appears to be more of a commercial plumbing/heating spec than one we would see on a project like this.

Response: See attached revised Specification 15400.

Question 7: Sheet MP-201 gives a centerline elevation of the 24” isolation valve at the wet well wall of 1’ 2 1/8” above the floor. OD of a 24” flange is 32” so it will be necessary for GC to remove existing concrete at least 6” below current elevation for 2-3’ at each valve location.

Response: Contractor has option to provide new 24" pipe connection, which will require cutting and patching of wall or connect to existing 16" flanged pipe with a new flat-on-bottom, eccentric 16x24 reducer. See revised Key Note #1 on revised Sheet No. MP-201.

Question 8: Sheet MP-201 Note 1 indicates connecting to existing pipe. Is there currently a 16” flange there that we will be connecting to?

Response: Contractor has option to provide new 24" pipe connection, which will require cutting and patching of wall or connect to existing 16" flanged pipe with a new flat-on-bottom, eccentric 16x24 reducer. See revised Key Note #1 on revised Sheet No. MP-201.

Question 9: Pump specification refers to dry pit submersible pumps. Drawings appear to indicate a different style.

Response: Specification 15540 has been revised to remove conflicting requirements regarding submersible and dry-pit type pumps. The pump submitted must meet the performance requirements shown in the Pump Schedule on Drawing Sheet No. MP-204 with the configuration shown on the mechanical drawings.


Question 10: Looking over the third addendum relative to the pumps, Section 15540, there is still a good amount of conflicting information as follows:

Part 2 - Products 2.03-D This paragraph wipes out the submersible construction but then it still notes the pumps (which are to be dry-pit pumps) must “continue to operate successfully should the dry pit be subjected to flooding”. To accomplish that, the pumps would have to be dry-pit submersible design with submersible motors. 2.05 Cable Entry Seal item A describes a submersible pump cable and cable entry design. 2.06 Motor item A describes a submersible pump motor and calls for capability of not less than 30 starts per hour. The motors are specified as being 150 HP and to my knowledge, there are no motors of that rating that will be suitable for 30 starts per hour. More likely, it would be 5 or less starts per hour. 2.06 item B requires the pump and motor being produced by the same manufacturer. That is not typical for a dry-pit pump. 2.06 item D requires the motor and cable to be suitable for continuous submergence under water o 65 feet or greater which is specific to a submersible pump/motor. 2.07 Multi-conductor Power Signal Cable calls for submersible pump motor cable. 2.09 Mechanical Seals items A through D describes a submersible pump mechanical seal design. 2.10 Pump Shaft item A describes a built together submersible pump/motor design. 2.11 Impeller item A describes a specific manufacturers submersible pump impeller. 2.12 Volute/Suction cover also describes a specific manufacturer’s submersible pump design. 2.13 Protection items A & B are describing a submersible pump motor design.

Response: Specification 15540 has been revised to remove conflicting requirements regarding submersible and dry-pit type pumps. The pump submitted must meet the performance requirements shown in the Pump Schedule on Drawing Sheet No. MP-204 with the configuration shown on the mechanical drawings.

END OF ADDENDUM NO. 5 CITY OF CHICAGO JAMIE L. RHEE DEPARTMENT OF PROCUREMENT SERVICES CHIEF PROCUREMENT OFFICER


Attachment A

Technical Specification Section 15400 – Plumbing and Drainage Systems

Technical Specification Section 15540 – Pumps

CITY OF CHICAGO DEPARTMENT OF AVIATION

O’HARE INTERNATIONAL AIRPORT I-190 LIFT STATION REPLACEMENT

PART THREE OF THREE TECHNICAL SPECIFICATIONS SPECIFICATION NO.: 156080 PROJECT NO.: H5171.15-01

CITY OF CHICAGO Rahm Emanuel Mayor

DEPARTMENT OF AVIATION Ginger S. Evans Commissioner

Issued by: DEPARTMENT OF PROCUREMENT SERVICES Jamie L. Rhee Chief Procurement Officer

AUGUST 17, 2016

ISSUED FOR ADDENDUM NO. 5

CHICAGO DEPARTMENT OF AVIATION 15400-1 PLUMBING AND DRAINAGE SYSTEMS I-190 LIFT STATION REPLACEMENT PROJECT NO: H5171.15-01 ISSUED FOR ADDENDUM NO. 5 / AUGUST 17, 2016

PLUMBING AND DRAINAGE SYSTEMS SECTION 15400

PART 1 GENERAL:

1.01 SECTION INCLUDES:

A. Work under this Section is subject to the requirements of the Contract Documents.

B. Furnish and install plumbing and drainage items as shown on the Contract Drawings and as specified herein, including but not limited to the following.

1. Plumbing systems to a point 5-feet outside the building.

a. Lift station piping

1.02 RELATED WORK:

A. Division 2 - Site Work

B. Division 3 - Concrete

C. Division 15 - Mechanical

D. Division 16 - Electrical

1.03 REFERENCES:

A. As a minimum, meet the requirements of the following codes and standards.

1. Chicago Building Code

2. ASME B31.9, “Building Services Piping”

3. Plumbing Fixtures for the ADA / IAC Regulatory Requirements:

a. ANSI Standard A117.1, “Buildings and Facilities - Providing Accessibility and Usability for Physically Handicapped People”

b. ADA Accessibility Guidelines for Buildings and Facilities

4. If applicable, install cast-iron soil pipe and cast-iron soil pipe fittings according to CISPI 1990 revised and edited edition of “Cast Iron Soil Pipe and Fittings Handbook, Volume I,” Chapter IV, “Installation of Cast Iron Soil Pipe and Fittings.”

2. ASTM A 53 - Pipe, Steel, Black and Hot-Dipped, Zinc-Coated


Welded and Seamless.

3. ASTM A 74 - Cast Iron Soil Pipe and Fittings.

4. ASTM A 234 - Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and Elevated Temperatures.

5. AWS - Welding and Brazing Qualifications.

6. MSS SP-67 - Butterfly Valves.

7. MSS SP-78 - Cast Iron Plug Valves, Flanged and Threaded Ends.

8. MSS SP-80 - Bronze Gate, Globe, Angle and Check Valves.

9. MSS SP-85 - Cast Iron Globe & Angle Valves, Flanged and Threaded Ends.

10. MSS SP-110 - Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends.

1.04 SUBMITTALS:

A. Refer to the Basic Mechanical Requirements Section, 15100.

1.05 QUALITY ASSURANCE:


B. Provide components and installations of the following minimum working pressure ratings, except where project conditions require otherwise:

1. Soil, Waste, and Vent Systems: 10-foot head of water

C. No plumbing fixture or piping shall be installed that will provide a cross-connection between drinking water and non-potable water.

D.B. All plumbing and drainage installations exposed to low temperatures shall be protected from freezing by heat-tracing.

E.C. Contractor Qualifications: Installation of plumbing and drainage equipment and accessories must be performed only by a qualified installer. The term qualified means experienced in performing the work required by this Section. The qualified installer will be responsible for demonstrating to the Commissioner’s satisfaction that he/she has sufficient experience in its role. The installer must submit evidence of such qualifications upon request by the Commissioner.


F.D. Manufacturer Qualifications: Fabrication of plumbing and drainage equipment and accessories must be performed only by a qualified fabricator. The term qualified means experienced in performing the work required by this Section. The qualified fabricator will be responsible for demonstrating to the Commissioner’s satisfaction that he/she has sufficient experience in its role. The qualified fabricator must submit evidence of such qualifications upon request by the Commissioner.

1.06 DELIVERY, STORAGE, AND HANDLING:


1.07 WARRANTIES:


1.08 EXTRA MATERIALS AND SPARE PARTS:

A. (Not Used)

PART 2 PRODUCTS:

2.01 ACCEPTABLE MANUFACTURERSPIPE:

A. PIPE AND FITTINGS AND TUBE:

1. Above Grade: a. Piping: Black steel ASTM A 53, schedule 40. b. Fittings: ASTM A 234 forged steel welding type, fittings. c. Joints: Welded d. Exterior Paint : Universal Primer.

1.

2. The use of PVC or similar plastic is not permitted for piping or fittings.

3. Soil, Waste, Vent and Drain Piping Suspended or Supported Within Buildings (Above Ground):

4. 2-1/2" and smaller piping shall be galvanized, Schedule 40, ASTM A53 or ASTM A120 steel pipe with threaded ends.

5. 3" and larger piping shall be cast iron conforming to City Building Code. Joints may be either screwed type or calked type. Calked joints shall be oakum and lead. Neoprene rubber compression joints shall not be acceptable.


6. Screwed fittings shall be ANSI B16.12 galvanized recessed type ASTM A 126 cast iron for drainage service. 150 psi malleable iron ANSI B16.3 galvanized for vent piping.

7. Underground Water Supply Pipe, Outside of Buildings:

a. All below grade water service piping smaller than 24" diameter and larger than 2-1/2" shall be ductile iron ANSI A21.51 pipe, cement-lined with mechanical joints. Mechanical joints and joint accessories including gaskets shall conform to ANSI A21.11; only plain rubber shall be allowed.

Pipe Size Nominal Thickness

Class

3" 0.34" 54

4" 0.38" 55

6" 0.40" 55

8" 0.45" 56

10" 0.47" 56

12" 0.49" 56

14" 0.48" 55

16" 0.46" 54

18" 0.44" 53

20" 0.45" 53

24" 0.50" 54

2.02 PIPE FITTINGS AND TUBE FITTINGS, INDOOR ABOVE GRADE:

A. Flanges Only Shall Be Used on Piping 4" and Larger: Galvanized, cast iron, screw-on type. ASTM A126 Class B, ANSI B16.1 and B16.2.

1. 125 lb. Class: Flat face, smooth finish: Similar to Stockham Fig. 490, 491, 492


2. 250 lb. Class: 1/16" raised face, smooth finish: Similar to Stockham Fig. 590, 591, 592

B. Bolts for Flanges: Hex head machine bolts with heavy hex-nuts. Bolts and nuts shall be cadmium plated. Carbon steel ASTM A 307, Grade B.

C. Gaskets: Flat ring gasket for 250 lb. class. Similar to Cranite, Garlock. Gaskets for water service may also be 1/16" thick red rubber.

D. Fittings for Domestic Water Service 4" and Smaller: Malleable iron, 150 lb. Class, galvanized, beaded ends, screwed pattern. ASTM A197 and ANSI B16.3.

E. Fittings for Domestic Water Service 6" and Larger: Cast iron, 125 lb. Class, flanged, galvanized. ASTM A126 Class B and ANSI B16.1.

F. Fittings for Underground Water Pipe: Cast iron ANSI A21.10, AWWA C 110. Fittings shall be cement-lined. Tees and elbows shall be anchored with retainer glands and coated with coal tar after installation.

G. Where dielectric insulating unions are required they shall have an insulator on pipe and collar, similar to EPCO. Unions shall be malleable iron and galvanized.

2.032.02 VALVES:

A. Gate Valves 2-1/2 Inches and Larger: Iron body, bronze trim, flanged ends, OS&Y, ASTM A126 Class B ferrosteel body and bonnet, solid cast iron disc with bronze trim. Design shall allow repacking under pressure. Wheel shall be malleable iron.

1. 125 lb. Class: Similar to Crane Fig. 465-1/2

2. 250 lb. Class: Similar to Crane Fig. 7-1/2E

B. Globe Valves 2-1/2 Inches and Larger: Flanged end with ASTM A126 Class B ferrosteel body and yoke bonnet, bronze disc, stem, stem hole bushing and bronze renewable body seat rings, and malleable iron wheel.

1. 125 lb. Class: Similar to Crane Fig. 351

2. 250 lb. Class: Similar to Crane Fig. 21E

A. GATE VALVES

1. Over 2 inches:

a. Manufacturers:


(1) American Valve.

(2) FMC Crosby Valve.

(3) Red-White Valve Corp.

b. Construction: Iron body, bronze trim, bolted bonnet, rising stem, hand-wheel, outside screw and yoke, solid wedge disc with bronze seat rings, flanged ends.

c. Exterior Paint : Universal Primer.

B. GLOBE OR ANGLE VALVES

1. Over 2 inches:

a. Manufacturers:

(1) American Valve.



b. Construction: Iron body, bronze trim, bolted bonnet, rising stem, hand-wheel, outside screw and yoke, rotating plug type disc with renewable seat ring and disc, flanged ends.


C. BALL VALVES

1. Over 2 inches:

a. Manufacturers:

(1) American Valve.



b. Construction: Cast steel body, chrome plated steel ball, teflon seat and stuffing box seals, lever handle, or gear drive hand-wheel for sizes 10 inches and over, flanged.


D. BUTTERFLY VALVES


1. Manufacturers:

a. American Valve.

b. FMC Crosby Valve.

c. Red-White Valve Corp.

2. Body: Cast or ductile iron with resilient replaceable EPDM seat, wafer or lug ends, extended neck.

3. Disc: Chrome plated ductile iron or Stainless steel.

4. Operator: 10 position lever handle, or Hand-wheel and gear drive.

E. FLANGES, UNIONS, AND COUPLINGS

1. Flanges for Pipe Over 2 inches:

a. Ferrous Piping: 150 pounds per square inch-gage forged steel, slip on.

2. Gaskets: 1/16-inch thick preformed Buna N suitable for water service.

3. Exterior Paint : Universal Primer.

4. Accessories: Steel bolts, nuts, and washers.

PART 3 EXECUTION

3.01 GENERAL:

A. Any proposed interruption of the normal use of the Airport facility shall be submitted to the Commissioner at least 30 days prior to the date. Ample advance notice shall also be given to all parties and tenants affected by the interruption.

B. At O’Hare, storm and sanitary drainage systems are separate. Sanitary sewers connect into the City of Chicago system. Storm sewers connect to the O’Hare storm sewage system.

C. Exposed metal parts, traps, etc. shall be chromium plated brass and handles shall be of metal.

3.02 SOIL, WASTE, VENT & STORM WATER PIPING:

A. All horizontal suspended sewers shall be run as close to overhead construction as possible and shall be securely supported by hangers to the


construction above. To as great an extent as possible, all junctions shall be made by a combination Y and 1/8 bend fittings.

B. Underground sewers shall be a minimum of 4 inches in diameter and shall have a minimum grade of 1/8 inch per foot of length.

A. INSTALLATION

1. Route piping in orderly manner and maintain gradient.

2. tall piping to conserve building space and not interfere with use of space.

3. Group piping whenever practical at common elevations.

4. Install piping to allow for expansion and contraction without stressing pipe, joints, or connected equipment.

5. Provide clearance for installation of insulation and access to valves and fittings.

3.03 VALVES: A. EXAMINATION

1. Verify Piping System is ready for installation. B. INSTALLATION

1. Provide non-conducting dielectric connections wherever jointing dissimilar metals.

2. Install valves with stems upright or horizontal, not inverted.

3. Install gate valves for shut-off and to isolate equipment, part of systems, or vertical risers.

4. Use lug end butterfly valves to isolate equipment.

C. INTERFACE WITH OTHER PRODUCTS

1. Conform to applicable piping specification for hangers and insulation.

3.033.04 MONITORING SYSTEM PROVISIONS:

A. Monitoring system devices shall be as described in the Contract Drawings. Typically, Airport monitoring systems shall be provided for the following equipment:

1. Circulating pumps -- flow switch


2. Ejector and sump pump basins -- hi-level

3. Other critical locations – as required

3.043.05 SYSTEM TESTING:

A. Water Distribution Piping System Tests: Test water distribution systems according to procedures of the Chicago Building Code, or in absence of published procedures, test as follows:

1. Test for leaks and defects in new water distribution piping systems and parts of existing systems that have been altered, extended, or repaired. If testing is performed in segments, submit separate report for each test, complete with diagram of portion of system tested.

2. Leave uncovered and unconcealed all new, altered, extended, or replaced water distribution piping until it has been tested.

3. Cap and subject the piping system to a static water pressure of 125 psig. Isolate test source and allow to stand for 4 hours. Leaks and loss in test pressure constitute defects that must be repaired.

4. Repair leaks and defects with new materials and retest system or portion thereof until satisfactory results are obtained.

5. Prepare reports for tests and required corrective action.

B. Drainage and Vent Piping System Tests: Test drainage and vent systems according to procedures of the Chicago Building Code, or in absence of published procedures, test as follows:

1. Test for leaks and defects in new drainage and vent piping systems and parts of existing systems that have been altered, extended, or repaired. If testing is performed in segments, submit a separate report for each test, complete with a diagram of the portion of the system tested.

2. Leave uncovered and unconcealed all new, altered, extended, or replaced drainage and vent piping until it has been tested and accepted.

3. Rough-in plumbing test procedure: Except for outside leaders and perforated or open-jointed drain tile, test piping of plumbing drainage and venting systems on completion of roughing-in piping installation. Tightly close all openings in piping system and fill with water to point of overflow, but not less than 10 feet head of water. Water level shall not drop during the period from 15 minutes


before inspection starts through completion of inspection. Inspect joints for leaks.

4. Finished plumbing test procedure: After plumbing fixtures have been set and their traps filled with water, test connections and prove gastight and watertight. Plug stack openings on roof and building drain where it leaves the building and introduce air into the system equal to pressure of 1-inch water column. Use a U-tube or manometer inserted in the trap of a water closet to measure this pressure. Air pressure shall remain constant without introducing additional air throughout period of inspection. Inspect plumbing fixture connections for gas and water leaks.

5. Repair leaks and defects using new materials and retest system or portion thereof until satisfactory results are obtained.

6. Prepare reports for tests and required corrective action.

3.053.06 CLEANING:

A. Clean interior of piping system. Remove dirt and debris as work progresses.

B. Purge new potable water distribution piping systems and parts of existing potable water systems that have been altered, extended, or repaired, prior to use.

C. Use purging and disinfecting procedure prescribed by City of Chicago Department of Water, if a method is not prescribed by that authority, use the procedure described in either AWWA C651 or AWWA C652, or as described below:

1. Flush piping system with clean, potable water until dirty water does not appear at outlets.

2. Fill system or part thereof with water/chlorine solution containing at least 50 parts per million of chlorine. Isolate (valve off) and allow to stand for 24 hours.

3. Drain system or part thereof of previous solution and refill with water/chlorine solution containing at least 200 parts per million of chlorine. Isolate and allow to stand for 3 hours.

4. Flush system with clean, potable water until chlorine does not remain in water coming from system following allowed standing time.


5. Submit water samples in sterile bottles to authority having jurisdiction. Repeat procedure if biological examination made by the authority shows evidence of contamination.

D. Prepare and submit reports for purging and disinfecting activities.

3.063.07 COMMISSIONING:

A. Perform the following checks before start-up:

1. Systems tests are complete.

2. Damages and defective specialties and accessories have been replaced or repaired.

3. Check that there is clear space for servicing of specialties.

B. Before operating systems, perform these steps:

1. Close drain valves, hydrants, and hose bibbs.

2. Open shutoff valves to full open position.

3. Open throttling valves to proper setting.

4. Remove plugs used during testing of piping systems and plugs used for temporary sealing of piping during installation.

5. Remove and clean strainer screens. Close drain valves and replace drain plugs.

6. Verify drainage and vent piping are clear of obstructions. Flush with water until clear.

7. Check plumbing specialties and verify proper settings, adjustments, and operation.

PART 4 METHOD OF MEASUREMENT AND PAYMENT

A. The price for all Work specified in this section, with the exception of the allowances outlined above, will be included in the total price indicated by the bidder in the space provided in the Part 1 Book, “Schedule of Prices”, Item G-1

END OF SECTION 15400


THIS PAGE INTENTIONALLY LEFT BLANK

CHICAGO DEPARTMENT OF AVIATION PUMPS I-190 LIFT STATION REPLACEMENT PROJECT NO: H5171.15-01 ISSUED FOR ADDENDUM NO. 5 / AUGUST 17, 2016

15540-1

PUMPS SECTION 15540 PART 1 GENERAL

1.01 SECTION INCLUDES:

A. Work under this Section is subject to the requirements of the Contract Documents.

B. This Section includes the following types of pumps:

1. Dry-Pit Wastewater Pumps and Controller

1.02 RELATED WORK:

A. Specified elsewhere.

1. Division 2 - Concrete.

2. Division 15 - Mechanical

3. Division 16 - Electrical.

1.03 REFERENCES:

A. UL 778 - Motor Operated Pumps.

B. Hydraulic Institute Standards.

C. NFPA 70 National Electrical Code.

D. NEMA.

E. ANSI.

1.04 SUBMITTALS:

A. Refer to Basic Mechanical Requirements Section 15100.

B. Shop Drawings showing layout and connections for pumps. Include setting Drawings with templates and directions for installation of foundation bolts and other anchorages.


15540-2

C. Product Data: Provide certified pump curves showing performance characteristics with pump and system operating point plotted. Include NPSH curve when applicable. Include electrical characteristics and connection requirements.

1. Manufacturer’s Installation Instructions: Indicate hanging and support requirements and recommendations.

2. Wiring diagrams detailing wiring for power, signal, and control systems, differentiating between manufacturer-installed wiring and field-installed wiring.

3. Maintenance data for pumps for inclusion in operating and maintenance manual.

1.05 QUALITY CONTROL:


B. Hydraulic Institute Compliance: Design, manufacture, and install pumps in accordance with "Hydraulic Institute Standards."

C. National Electrical Code Compliance: Provide components complying with NFPA 70 "National Electrical Code."

D. UL Compliance: Provide pumps which are listed and labeled by UL, and comply with UL 778 "Motor Operated Water Pumps."

E. NEMA Compliance: Provide electric motors and components that are listed and labeled NEMA.

F. Single Source Responsibility: Obtain similar types of pumps from a single manufacturer.

G. Ensure pumps operate at specified system fluid temperatures without vapor binding and cavitation, are non-overloading in parallel individual operation, and operate with 25 percent of midpoint of published maximum efficiency curve.

H. Contractor Qualifications: Installation and alterations of pump equipment, specialties and accessories, and repair and servicing of equipment must be performed only by a qualified Contractor. The term qualified means experienced in such work. The Contractor must have successfully completed a minimum of five projects in the past similar in size and scope to this Project. The Contractor must be familiar with all


15540-3

precautions required and must comply with all the requirements of the authority having jurisdiction. Upon request, submit evidence of such qualifications to the Commissioner.

I. Manufacturer Qualifications: Company specializing in manufacturing the products specified in this Section must have a minimum of five years documented experience.

1.06 DELIVERY, STORAGE AND HANDLING:


B. Store pumps in a dry indoor location.

C. Apply factory finish paint to assembled, tested units prior to shipping.

D. Retain shipping flange protective covers and protective coatings during storage.

E. Preparation for Shipping: After assembly and testing, clean flanges and exposed machined metal surfaces and treat with an anticorrosion compound. Protect flanges, pipe openings, and nozzles.

F. Protect bearings and couplings against damage from sand, grit, and other foreign matter.

G. For storage times greater than 5 days, dry internal parts with hot air or a vacuum-producing device to avoid rusting internal parts. Upon drying, coat internal parts with a protective liquid, such as light oil, kerosene, or antifreeze. Dismantle bearings and couplings, dry and coat them with an acid-free heavy oil, and then tag and store in dry location.

H. Comply with manufacturer's rigging instructions for handling.

1.07 WARRANTIES:


1.08 DEFINITIONS

A. SMS: Supervisory Monitoring System


15540-4

PART 2 PRODUCTS

2.01 MANUFACTURERS:

A. Acceptable Manufacturers. Subject to compliance with the requirements of the Contract Documents, the products must be by one of the following or approved equal. Other manufacturers and equipment may be found in the text of this Section.

1. Dry-Pit Wastewater Pumps: Flygt, Vaughn, Weil, Bell & Gossett, Morris, Grundfos or approved equal

B. The design of this Project, including all Plans, Drawings, and construction details, is based on the stated manufacturer’s model numbers. If the Contractor intends to provide items or equipment from any of the other acceptable manufacturers listed in the Contract Documents, then the Contractor must be responsible for the cost of any and all Work, including, but not limited to additional design, engineering, labor, material, equipment and all costs, necessary to accommodate such items or equipment for this Project.

C. Any and all Work that may be required to accommodate any items or equipment of the other acceptable manufacturers listed in the Contract Documents is, without limitation, subject to the review of the Commissioner.

2.02 PUMPS, GENERAL:

A. Pumps: Factory-assembled and factory-tested. Type, sizes, and capacities must be as indicated on the Contract Drawings.

B. Efficiency: "Energy-efficient" motors must have a minimum efficiency as indicated in accordance with IEEE 112, Test Method B. If efficiency is not specified, motor must have a higher efficiency than the "average standard industry motors," in accordance with IEEE 112, Test Method B.

2.03 DRY-PIT WASTEWATER PUMPS:

A. Furnish and install, where indicated on the Contract Drawings, dry-pit sewage pumps suited for the conditions shown on the Contract Drawings.


15540-5

B. Units must be the centrifugal type suitable for handling solids up to 3” in diameter.

C. REQUIREMENTS

1. Furnish and install 3 dry-pit wastewater pump(s). Each pump shall be connected for operation on 480 volts, 3 phase, 60 hertz, 3 wire service. The power cable shall be sized according to NEC and ICEA standards and also meet with P-MSHA Approval.

D. PUMP DESIGN CONFIGURATIONS (Dry pit installation)

1. Pump shall be capable of operating in a continuous non submerged condition in vertical position in a dry pit installation, permanently connected to inlet and outlet pipes. Although the normal operation of the pumps will be dry pit, the pumps shall be of submersible construction and will continue to operate satisfactorily should the dry pit be subjected to flooding.

2.04 PUMP CONSTRUCTION

A. Major pump components shall be of grey cast iron, ASTM A-48, Class 35B, with smooth surfaces devoid of blow holes or other irregularities. The lifting handle shall be of stainless steel. All exposed nuts or bolts shall be of stainless steel construction. All metal surfaces coming into contact with the pumpage, other than stainless steel or brass, shall be protected by a factory applied spray coating of acrylic dispersion zinc phosphate primer with a polyester resin paint finish on the exterior of the pump.

B. Sealing design shall incorporate metal-to-metal contact between machined surfaces. Critical mating surfaces where watertight sealing is required shall be machined and fitted with Nitrile O-rings. Fittings will be the result of controlled compression of rubber O-rings in two planes and O-ring contact of four sides without the requirement of a specific torque limit.

C. Rectangular cross sectioned gaskets requiring specific torque limits to achieve compression shall not be considered as adequate or equal. No secondary sealing compounds, elliptical O-rings, grease or other devices shall be used.


15540-6

2.05 CABLE ENTRY SEAL

A. The cable entry seal design shall preclude specific torque requirements to insure a watertight and submersible seal. The cable entry shall consist of dual cylindrical elastomer grommets, flanked by washers, all having a close tolerance fit against the cable outside diameter and the entry inside diameter. The grommets shall be compressed by the cable entry unit, thus providing a strain relief function. The assembly shall provide ease of changing the cable when necessary using the same entry seal. The cable entry junction chamber and motor shall be sealed from each other, which shall isolate the stator housing from foreign material gaining access through the pump top. Epoxies, silicones, or other secondary sealing systems shall not be considered equal.

2.06 MOTOR

A. The pump motor shall be a NEMA B design, induction type with a squirrel cage rotor, shell type design, housed in an air filled, watertight chamber. The stator windings shall be insulated with moisture resistant Class H insulation rated for 180°C (356°F). The stator shall be insulated by the trickle impregnation method using Class H monomer-free polyester resin resulting in a winding fill factor of at least 95%. The motor shall be inverter duty rated in accordance with NEMA MG1, Part 31.The stator shall be heat-shrink fitted into the cast iron stator housing. The use of multiple step dip and bake-type stator insulation process is not acceptable. The use of pins, bolts, screws or other fastening devices used to locate or hold the stator and that penetrate the stator housing are not acceptable. The motor shall be designed for continuous duty while handling pumped media of up to 104°F. The motor shall be capable of no less than 6 to 7 evenly spaced starts per hour. The rotor bars and short circuit rings shall be made of aluminum. Three thermal switches shall be embedded in the stator end coils, one per phase winding, to monitor the stator temperature. These thermal switches shall be used in conjunction with and supplemental to external motor overload protection and shall be connected to the motor control panel.

B. The junction chamber shall be sealed off from the stator housing and shall contain a terminal board for connection of power and pilot sensor cables using threaded compression type terminals. The use of wire nuts or crimp-type connectors is not acceptable. The motor and the pump shall be produced by the same manufacturer.

C. The motor service factor (combined effect of voltage, frequency and specific gravity) shall be 1.15. The motor shall have a voltage tolerance


15540-7

of +/- 10%. The motor shall be designed for continuous operation in up to a 40°C ambient and shall have a NEMA Class B maximum operating temperature rise of 80°C. A motor performance chart shall be provided upon request exhibiting curves for motor torque, current, power factor, input/output kW and efficiency. The chart shall also include data on motor starting and no-load characteristics.

D. Motor horsepower shall be sufficient so that the pump is non-overloading throughout its entire performance curve, from shut-off to run-out. The motor and cable shall be capable of continuous submergence underwater without loss of watertight integrity to a depth of 65 feet or greater.

2.07 MULTICONDUCTOR POWER SIGNAL CABLE:

A. The power cable shall be sized according to the NEC and ICEA standards and shall be of sufficient length to reach the motor starterdisconnect switch without the need of any splices.. The outer jacket of the cable shall be oil resistant chlorinated polyethylene rubber. The cable shall be capable of continuous submergence underwater without loss of watertight integrity to a depth of 65 feet or greater. Cable shall includebe sized to meet or per manufacturer recommendations 4-14AWG contacts. Alternatively, provide a separate 4 conductor 14 AWG multiconductor power cable withsubmersible terminations and cable for SMS interfaces. Route cables as shown on the Electrical Plans.

2.08 BEARINGS

A. The integral pump/motor shaft shall rotate on two bearings. The motor bearings shall be sealed and permanently grease lubricated with high temperature grease. The upper motor bearing shall be a two row angular contact ball bearing to handle radial loads. The lower bearing shall be a two row angular contact ball bearing to handle the thrust and radial forces. The minimum L10 bearing life shall be 50,000 hours at any usable portion of the pump curve.

2.09 MECHANICAL SEALS

A. Each pump shall be provided with a positively driven dual, tandem mechanical shaft seal system consisting of two seal sets, each having an independent spring. The lower primary seal, located between the pump and seal chamber, shall contain one stationary and one positively driven rotating corrosion and abrasion resistant tungsten-carbide ring. The upper secondary seal, located between the seal


15540-8

chamber and the seal inspection chamber shall be a leakage-free seal. The upper seal shall contain one stationary and one positively driven rotating corrosion and abrasion resistant tungsten-carbide seal ring. The rotating seal ring shall have small back-swept grooves laser inscribed upon its face to act as a pump as it rotates, returning any fluid that should enter the dry motor chamber back into the lubricant chamber. All seal rings shall be individual solid sintered rings. Each seal interface shall be held in place by its own spring system. The seals shall not depend upon direction of rotation for sealing. Mounting of the lower seal on the impeller hub is not acceptable. Shaft seals without positively driven rotating members or conventional double mechanical seals containing either a common single or double spring acting between the upper and lower seal faces are not acceptable. The seal springs shall be isolated from the pumped media to prevent materials from packing around them, limiting their performance.

B. Each pump shall be provided with a lubricant chamber for the shaft sealing system. The lubricant chamber shall be designed to prevent overfilling and shall provide capacity for lubricant expansion. The seal lubricant chamber shall have one drain and one inspection plug that are accessible from the exterior of the motor unit. The seal system shall not rely upon the pumped media for lubrication.

C. The area about the exterior of the lower mechanical seal in the cast iron housing shall have cast in an integral concentric spiral groove. This groove shall protect the seals by causing abrasive particulate entering the seal cavity to be forced out away from the seal due to centrifugal action.

D. A separate seal leakage chamber shall be provided so that any leakage that may occur past the upper, secondary mechanical seal will be captured prior to entry into the motor stator housing. Such seal leakage shall not contaminate the motor lower bearing. The leakage chamber shall be equipped with a float type switch that will signal if the chamber should reach 50% capacity.

2.10 PUMP SHAFT

A. The pump and motor shaft shall be a single piece unit. The pump shaft is an extension of the motor shaft. Shafts using mechanical couplings shall not be acceptable unless otherwise approved. The shaft shall be stainless steel – ASTM A479 S43100-T. Shaft sleeves will not be acceptable.


15540-9

2.11 IMPELLER

A. The impeller shall be of Hard-IronTM (ASTM A-532 (Alloy III A) 25% chrome cast iron), dynamically balanced, semi-open, multi-vane, back swept, screw-shaped, non-clog design. The impeller leading edges shall be mechanically self-cleaned automatically upon each rotation as they pass across a spiral groove located on the volute suction. The leading edges of the impeller shall be hardened to Rc 60 and shall be capable of handling solids, fibrous materials, heavy sludge and other matter normally found in wastewater. The screw shape of the impeller inlet shall provide an inducing effect for the handling of up to 5% sludge and rag-laden wastewater. The impeller to volute clearance shall be readily adjustable by the means of a single trim screw. The impeller shall be locked to the shaft, held by an impeller bolt and shall be coated with alkyd resin primer.

2.12 VOLUTE / SUCTION COVER

A. The pump volute shall be a single piece grey cast iron, ASTM A-48, Class 35B, non-concentric design with smooth passages of sufficient size to pass any solids that may enter the impeller. Minimum inlet and discharge size shall be as specified. The volute shall have a replaceable suction cover insert ring in which are cast spiral-shaped, sharp-edged groove(s). The spiral groove(s) shall provide trash release pathways and sharp edge(s) across which each impeller vane leading edge shall cross during rotation so to remain unobstructed. The insert ring shall be cast of Hard-IronTM (ASTM A-532 (Alloy III A) 25% chrome cast iron) and provide effective sealing between the multi-vane semi-open impeller and the volute housing.

2.13 PROTECTION

A. Each pump motor stator shall incorporate three thermal switches, one per stator phase winding and be connected in series, to monitor the temperature of the motor. Should the thermal switches open, the motor shall stop and activate an alarm. A float switch shall be installed in the seal leakage chamber and will activate if leakage into the chamber reaches 50% chamber capacity, signaling the need to schedule an inspection.

B. The thermal switches and float switch shall be connected to a control and status monitoring unit. The control and status unit shall be designed to be mounted in the pump control panel.


15540-10

2.142.09 WET-WELL LEVEL CONTROL SYSTEM

A. Provide a single enclosure power and control panel, in a NEMA-4X stainless steel enclosure. The enclosure shall be provided with a hinged tamper-resistant ‘Dead-Front’ outer-door designed to protect the internal components, as well as a separate hinged inner-door. A NEMA-4X Red Lexan flashing alarm-light shall be mounted on the top exterior of the enclosure. A NEMA-4X audible alarm-buzzer and silence push-button shall be mounted on the exterior of the enclosure. The outer door of the panel shall include padlocking provisions. The inner-door shall include a door-interlocked through-the-door safety power-disconnect switch operator. All of the control panel components specified herein shall be factory internally pre-wired and tested in accordance with the provisions of the National Electrical Code The control panel shall have the UL-508 listing mark for industrial control panels.

B. The following devices shall be mounted on the inner-door, or shall be accessible without the need to open the inner-door:

C. One (1) Color 7” Touch-Surface operator interface panel with Ethernet

D. Three (3) pump hand-off-auto selector switches.

E. Three (3) pump-power circuit-breaker operators.

F. Three (3) pump current overload-reset push-buttons.

G. One (1) control-mode float-transducer-auto selector switch.

H. One (1) float-backup engaged light.

I. Three (3) pump elapsed running-time meters.

J. The protected internal portion of the control panel shall include the following:

1. One (1) 3-phase, main-power disconnect switch.

2. One (1) 3-phase power-distribution block.

3. Three (3) 3-phase thermal magnetic circuit breakers.

4. Three (3) 3-phase NEMA sized across the line starters.


15540-11

5. Three (3) 3-phase adjustable class-10 current overload-blocks with through-the-door reset push-buttons.

6. One (1) 3-phase power monitor, capable of monitoring loss of phase, low-voltage, high-voltage, voltage-imbalance, phase-reversal & rapid-cycling.)

2.152.10 The enclosure shall also house all other necessary control components, including but not limited to:

A. One (1) control-circuit transformer with separately-fused primary, and fused 120-volt secondary & control power switch. See single line diagram for rating.

B. Three (3) seal-fail modules with adjustable sensitivity.

C. One (1) anti-condensation convection-type space-heater with fully-adjustable thermostat.

D. One (1) controller-service power-disconnect switch.

E. One (1) 24Vdc power-supply unit.

F. One (1) Allen Bradley programmable logic controller (PLC).

G. The Color Touch-Surface operator interface panel shall be manufactured to the following design criteria & capabilities:

H. Capable of displaying a minimum of 65,500-colors.

I. An LCD display.

J. An LED backlight.

K. One (1) USB Host version 1.1/1

L. Three (3) serial COM ports.

M. Built-In perpetual calendar.

N. 24Vdc operating voltage.

O. Harsh environment mini-ups backup.


15540-12

P. 7” Diagonal wide-screen touch-surface, with a resolution of 800 x 480-Pixels, Flash ROM of 128MB, and 10/100 Base-T Ethernet capability.

Q. The A-B programmable logic controller (PLC) shall be powered by an individual 24Vdc power supply unit. The PLC shall be manufactured to the following design criteria & capabilities:

R. Non-volatile battery-backed RAM.

S. Built-in back-up memory storage module.

T. 10K user program space.

U. 10K configurable user data space.

V. 128K data logging & recipe storage.

W. Twenty Four (24) 24Vdc fast digital inputs.

X. Eight (8) 24Vdc normal digital inputs.

Y. Eight (8) digital relay outputs.

Z. Eight (8) dc fast digital outputs.

AA. Three (3) dc normal digital outputs.

BB. Four (4) analog voltage inputs.

CC. Two (2) analog voltage outputs.

DD. Two (2) isolated combination RS232C/RS485 serial port.

EE. Two (2) non-isolated RS232C serial port.

FF. Two (2) RJ-45 10/100 Ethernet/IP port.

GG. Two (2) digital trim potentiometers.

HH. Up to six (6) embedded high speed input channels @ 100kHz.

II. Embedded perpetual real-time clock.

JJ. PID control.

KK. 3-channel PTO (100kHz)/PWM (40kHz).


15540-13

LL. Dual axis servo control.

MM. Embedded LCD with backlight.

NN. Floating point math values.

OO. Online editing.

PP. Operating temperature range of -4°F -to- 140°F

2.162.11 The programmable logic controller shall be pre-programmed at the manufacturer’s facility, to perform the following major functions, as well as various additional functions, as referenced in the paragraphs which follow. The system shall operate based on operator adjustable preferences entered via the menu-keys displayed on the touch-surface operator interface panel.

A. The major functions are as follows:

B. Monitor & display real-time wet-well liquid-level, and manage pump operation based on user-selected set-point programming.

C. Operate one (1) pump during low-level flow periods; operate three (3) pumps during high-level flow periods.

D. Alternate the three pumps on operator selected time-intervals.

E. Monitor & delay pump-starts to avoid short-cycling motors.

F. Monitor & delay pump-starts to avoid simultaneous starting of pumps following utility power losses.

G. Monitor & recognize inoperable level sensing devices, and modify system operation to compensate for this occurrence.

H. Provide easily identifiable alarm messages for the operating personnel to monitor.

I. Monitor embedded pump-motor thermal-sensors and seal failure sensor.

J. Calculate lift station flows with trending

K. Monitor check valve for open and closed position for pump operation safety. (automated check switch by others). Provide alarm if pump check valve is open with pump no commanded to run.


15540-14

L. Initiating Operation: The color touch-surface operator interface panel shall be preprogrammed at the manufacturer’s facility, allowing the field operating personnel to answer five (5) or fewer questions with simple one-word answers, in order to enable the control logic the ability to initiate the proper mode of preconfigured automatic operation of the pump station.

M. The color touch-surface operator interface panel shall provide additional simple screen-selections, allowing the operating personnel to select the appropriate operating parameters for the following categories:

N. Lead-pump start & stop elevations.

O. Lag-pump start & stop elevations.

P. Lead/Lag pump alternation time-interval

Q. High liquid-level alarm elevation.

R. Low liquid-level alarm elevation.

S. Individual pump start & stop delay-times – Lead/Lag.

T. Individual pump stage delay-times – Lead/Lag.

U. Individual pump fail indication delay-times – Lead/Lag.

V. High liquid-level alarm indication delay-time.

W. Low liquid-level alarm indication delay-time.

X. High flow-rate alarm indication delay-time.

Y. Float back-up reset delay-time.

Z. Primary level-transducer scale-definition in feet of elevation.

AA. Back-up level-transducer scale-definition in feet of elevation.

BB. Level-transducer flow-rate scale-definition in gallons per minute.

CC. Selection of primary -vs- secondary level-transducer.

DD. Level display elevation.


15540-15

EE. Remote Start/Stop stations at pump floor and mezzanine floor levels for 3 pumps. Pump stops under all conditions when Stop button is depressed, pump starts and runs 5 minutes or until low level is sensed when Start button is depressed.

2.172.12 WET WELL PUMP CONTROL PANEL

A. The wet well pump control panel (PCP) shall start the lead pump when detected by the PCL. If the lead pump fails to start or experiences a failure the associated pump “fault” light will be lit and an alarm signal will be sent to the SMS, and lag pump will start. If the lag pump has started and the level continues to rise, the next lag pump will be energized. If the lag pump fails to start or experiences a failure, the associated pump fault indicator light shall be lit and an alarm will be sent to the SMS. If the level continues to raise the “High Wet Well Level” an alarm signal will be sent to the SMS remote central station for annunciation. A local horn shall locally indicate a “High Wet Level” has occurred. The horn shall be provided with a silence button, but the alarm signal will be maintained until the condition changes. As the Wet Well level drops, the pumps will be de-energized as the corresponding level are detected. Upon successful completion of Lead, and Lag if needed) pump cycle, an alternator shall switch its designation of lead and lag pumps.

B. A separate level air pressure switch will be used to detect a “High High Wet Well Level indicating the liquid level has exceeded the maximum line for safety of operation of the Wet Well. The “High High Level” alarm shall energized all the lead lag pumps for simultaneous operation, and sends a “fault” signal to the SMS central station for remote alert emergency annunciation.

C. Provide Wet Well Pump Control Panel with the following items: All indicating 30 mm LED type.

1. Pump not Running Lights (1 per pump)

2. Pump Run Lights (using existing flow switches) 1 per pump

3. Pump Fail Lights (1 per pump)

4. Seal-Fail Lights (1 per pump)

5. High Wet Well level alarm Light.

6. Pump fails dry remote alarm contacts (2 per pump)


15540-16

7. High level remote alarm contact (1 set)

2.182.13 MONITORING SYSTEM PROVISIONS

A. Connections must be provided to the Supervisory Monitoring System for each of the pumps furnished.

PART 3 EXECUTION:

3.01 EXAMINATION:

A. Contractor examine areas, equipment foundations, and conditions, with Commissioner present, for compliance with requirements for installation tolerances and other conditions affecting performance of pumps.

B. Examine rough-in for piping systems to verify actual locations of piping connections prior to installation.

C. Examine equipment foundations and inertia bases for suitable conditions where pumps are to be installed.

D. Do not proceed until unsatisfactory conditions have been corrected.

3.02 INSTALLATION:

A. Provide access space around pumps for service. Provide no less than minimum clearance as recommended by manufacturer.

B. Decrease from line size with long radius reducing elbows or reducers. Support piping adjacent to pump such that no weight is carried on pump casings. Provide supports under elbows on pump suction and discharge line sizes 4 inches and over.

C. Provide eccentric type reducers when installed in the pump suction piping. Eccentric reducers shall be installed with the straight side of the reducer on the top of the pipe.

D. Provide line sized shut-off valve on pump suction.

E. Provide drains for bases and seals, piped to and discharging into floor drains.

F. Install close coupled and base mounted pumps on concrete housekeeping base, with anchor bolts, set and level, and grout in place.


15540-17

G. Lubricate pumps before start-up according to manufacturer’s recommendations.

H. Support pumps and piping separately so that the weight of the piping system does not rest on the pump.

I. Install pumps in locations indicated on the Contract Drawings and arranged to provide access for periodic maintenance, including removal of motors, impellers, couplings, and accessories.

J. Support pumps and piping separately so that the weight of the piping system does not rest on the pump.

3.03 CONNECTIONS:

A. Install piping, reducers (increasers), fittings, strainers, flexible connectors, and valves on the suction and discharge of the pumps as indicated on the Contract Drawings.

3.04 FIELD QUALITY CONTROL:

A. Check suction line connections for tightness to avoid drawing air into the pump.

3.05 COMMISSIONING:

A. Final Checks Before Startup: Perform the following preventive maintenance operations and checks before startup:

1. Lubricate oil-lubricated bearings.

2. Remove grease-lubricated bearing covers and flush the bearings with kerosene and thoroughly clean. Fill with new lubricant in accordance with the manufacturer's recommendations.

3. Check that pump is free to rotate by hand. If the pump is bound or even drags slightly, do not operate the pump until the cause of the trouble is determined and corrected.

4. Check the general mechanical operation of the pump and motor.


15540-18

PART 4 METHOD OF MEASUREMENT AND PAYMENT

A. The price for all Work specified in this section, with the exception of the allowances outlined above, will be included in the total price indicated by the bidder in the space provided in the Part 1 Book, “Schedule of Prices”, Item G-1.

END OF SECTION 15540

Addendum No. 5 Specification No. 156080 Page 6 of 6

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AUGUST 17, 2016 ADDENDUM NO. 5 FOR I-190 LIFT STATION ...

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