140R6021R0006 Amendment 0003_0003.pdf

(x)

140R6021R0006 x x

1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE

RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR

OFFER. If by virtue of this amendment you desire to change an offer already submitted , such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

Billings MT 59107

R60

PO Box 36900 Regional Office Great Plains Region Bureau of Reclamation

03/26/20210003

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following methods: (a) By completing

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

02/11/2021

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

E. IMPORTANT: Contractor is not is required to sign this document and return __________________ copies to the issuing office.

ORDER NO. IN ITEM 10A.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

See Page 2 of 2 for changes incorporated with this amendment

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

(Signature of person authorized to sign) (Signature of Contracting Officer)

Michael L. Birkland

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 10A, as heretofore changed, remains unchanged and in full force and effect .

Solicitation# 140R6021R0006

Amendment No. 0003

Description of Changes: The following changes are hereby incorporate by this amendment:

1. In Part I – The Schedule, Section C – Specifications, remove Section 46 43 53 - Solids Contact Clarifier Equipment in its entirety and substitute therefor the attached revised Section 46 43 53.

2. Closing Date for the Receipt of Proposals- The hour and date for receipt of proposals is hereby extended to April 8, 2021 at 1300 MDT.

Acknowledgement: See Block 11 above regarding how to acknowledge this amendment. The Government must receive the acknowledgement at the place designated for receipt of proposals (See Block 7 of the Standard Form 1447).

Third Party: If you have given a copy of the solicitation to someone else, please forward this amendment accordingly.

All contractor questions and their requisite answers are included with this amendment and are provided for informational purposes only.

Leadville Mine Treatment Plant and Facilities Supply of Solids Contact Clarifier Equipment Amendment No. 003 Leadville Mine Drainage Tunnel Project, Colorado Solicitation No. 140R6021R0006

Solids Contact Clarifier (SCC) Equipment

Revised 46 43 53 - 1

SECTION 46 43 53

SOLIDS CONTACT CLARIFIER (SCC) EQUIPMENT

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Solids Contact Clarifier Equipment – Fabrication:

1. Payment: Lump-sum price offered in the Price Schedule:

a. Includes:

1) Submittal approval drawings and data.

2) Fabrication.

3) Electrical and control panels.

4) Instrumentation.

5) Programming.

6) Startup and testing.

7) Training: Two multi-session courses to accommodate Government employees working alternate shifts.

8) Operation and maintenance manuals.

b. Does not include: Installation.

B. Solids Contact Clarifier Equipment – Delivery:

1. Payment: Lump-sum price offered in the Price Schedule.

a. Includes delivery to project site.

b. Does not include unloading at the project site. Unloading at the project site shall be by others as part of the Water Treatment Plant Replacement project.

C. Solids Contact Clarifier Equipment – Spare Parts:

1. Payment: Lump-sum price offered in the Price Schedule. Includes extra materials as specified herein.

D. Solids Contact Clarifier Equipment – Base Warranty:

1. Payment: Lump-sum price offered in the Price Schedule. Includes Base

Warranty as specified herein.

Revised 46 43 53 - 2

E. Solids Contact Clarifier Equipment – Warranty Extension 1:

1. Payment: Lump-sum price offered in the Optional Price Schedule 2. Includes

Warranty Extension 1 as specified herein.

F. Solids Contact Clarifier Equipment – Warranty Extension 2:

1. Payment: Lump-sum price offered in the Optional Price Schedule 3. Includes

Warranty Extension 2 as specified herein.

G. Solids Contact Clarifier Equipment – Storage:

1. Payment: Unit price offered in the Optional Price Schedule 4.

1.02 DEFINITIONS

A. SCC: Solids Contact Clarifier.

B. SCC System: All SCC trains.

1.03 REFERENCE STANDARDS

A. American Institute of Steel Construction (AISC)

1. AISC 360-2016 Specification for Structural Steel Buildings, 15th Edition

B. American Gear Manufacturers Association (AGMA)

1. AGMA 2001-D04(2016) Fundamental Rating Factors and Calculation

Methods for Involute Spur and Helical Gear Teeth

C. American Petroleum Institute

1. API 650-13 P

th P Ed Welded Tanks for Oil Storage

D. American Society of Civil Engineers (ASCE)

1. ASCE 7-2016 Minimum Design Loads and Associated

Criteria for Buildings and Other Structures

E. American Society of Mechanical Engineers (ASME)

1. ASME A13.1-2015 Scheme for the Identification of Piping

Systems

2. ASME BPVC IX-2019 Boiler and Pressure Vessel Code - Section

IX - Welding and Brazing Qualifications

3. ASME B16.21-2016 Nonmetallic Gaskets for Pipe Flanges

4. ASME B16.5-2017 Pipe Flanges and Flanged Fittings: NPS 1/2

Through NPS 24 Metric/Inch Standard

Revised 46 43 53 - 3

5. ASME B31.3-2018 Process Piping

6. ASME B40.100-2013 Pressure Gauges and Gauge Attachments

7. ASME PCC-1-2019 Guidelines for Pressure Boundary Bolted

Flange Joint Assembly

F. ASTM International (ASTM)

1. ASTM A126-04(2019) Standard Specification for Gray Iron

Castings for Valves, Flanges, and Pipe Fittings

2. ASTM A193/A193M-19 Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications

3. ASTM A194/A194M-18 Standard Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both

4. ASTM A216/A216M-18 Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service

5. ASTM A276/A276M-17 Standard Specification for Stainless Steel Bars and Shapes

6. ASTM A380/A380M-17 Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems

7. ASTM A536-84(2019)e1 Standard Specification for Ductile Iron Castings

8. ASTM D1784-11 Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC) Compounds

9. ASTM D1785-15e1 Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120

10. ASTM D2467-15 Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80

11. ASTM D2564-12(2018) Standard Specification for Solvent Cements for Poly(Vinyl Chloride) (PVC) Plastic Piping Systems

Revised 46 43 53 - 4

12. ASTM D2737-12a Standard Specification for Polyethylene (PE) Plastic Tubing

13. ASTM D2855-15 Standard Practice for the Two-Step (Primer and Solvent Cement) Method of Joining Poly(Vinyl Chloride) (PVC) or Chlorinated Poly(Vinyl Chloride) (CPVC) Pipe and Piping Components with Tapered Sockets

14. ASTM D3350-14 Standard Specification for Polyethylene Plastics Pipe and Fittings Materials

15. ASTM F1970-19 Standard Specification for Special Engineered Fittings, Appurtenances or Valves for use in Poly(Vinyl Chloride) (PVC) or Chlorinated Poly(Vinyl Chloride) (CPVC) Systems

G. American Water Works Association (AWWA)

1. AWWA C512-07 Air-Release, Air/Vacuum, and Combination

Air Valves for Waterworks Service

2. AWWA C517-16 Resilient-Seated Cast-Iron Eccentric Plug

Valves

H. American Welding Society (AWS)

1. AWS D1.1/D1.1M-2020 Structural Welding Code – Steel

2. AWS D1.6/D1.6M-2017 Structural Welding Code – Stainless Steel

I. International Code Council (ICC)

1. IBC-2018 International Building Code

J. Manufacturers Standardization Society of the Valve and Fittings Industry (MSS)

1. MSS SP-58-2009 Pipe Hangers and Supports – Materials, Design, Manufacture, Selection, Application, and Installation

2. MSS-SP-99-2016a Instrument Valves

3. MSS-SP-122-2017 Plastic Industrial Ball Valves

K. National Electrical Manufacturer’s Association (NEMA)

1. NEMA 250-2018 Enclosures for Electrical Equipment

(1,000-Volts Maximum)

2. NEMA MG 1-2016 Motors and Generators

Revised 46 43 53 - 5

L. United States Environmental Protection Agency (EPA)

1. EPA SmartWay Available at: https://www.epa.gov/smartway

2. EPA Substitutes in Coatings Available at:

https://www.epa.gov/snap/substitutes-coatings

1.04 SUBMITTALS

A. Submit in accordance with Sections 01 33 00 – Submittals and 01 33 26 – Electrical and Control Drawings and Data.

B. RSN 46 43 53-1, Approval Drawings and Data:

1. Manufacturer’s data including:

a. Model number.

b. Materials of construction.

c. Equipment configuration.

d. Installation details.

e. Equipment weight, including empty weight and maximum operating weight of each major item of equipment.

f. Elastomer chemical compatibility.

g. Coatings for each component, including instrumentation.

2. Manufacturer’s process system design including, but not limited to, the following:

a. Minimum and maximum flow rates in gallons per minute (gpm).

b. Manufacturer to provide the following calculations:

1) For Reactor Tank design:

a) Mean velocity gradient.

b) Impeller power number.

c) Impeller rotational speed.

d) Reynolds number.

e) Water rise rate.

f) Hydraulic residence time.

g) Mixer motor efficiency.

2) For Clarifier design:

a) Surface loading rate with and without plate settler/tube settler projected area.

b) Plate settler/tube settler projected area.

Revised 46 43 53 - 6

c) Plate settler/tube settler dead space and location of shown on a plan view.

d) Radial/horizontal water velocity.

e) Scraper tip speed.

f) Reynolds number.

g) Froude number.

h) Hydraulic residence time.

3. Drawings:

a. Assembly, installation, layout, and dimensional drawings including general arrangement, equipment connections, and internal components.

b. Drawings showing anchor bolts with dimensions, embedment depths, and sizes.

c. Valve list, instrument list, bill of materials, P&IDs, and material schedule.

d. Engraving schedule and physical dimensions for nameplates.

4. List of all instrumentation to be provided, with descriptive information for each component.

5. Structural Design Data:

a. Reactions at attachment points for dead, live, and seismic loading.

b. Dimensioned drawings (plan and elevations) showing attachment points, unit weight (empty and maximum operating weight), and center of mass of SCC System.

c. Structural calculations for reactions at attachment points signed and stamped by a licensed Professional Engineer.

6. Electrical and Controls:

a. Electrical load list including voltage and full load current of all electrical loads.

b. Vendor control panel materials of construction.

c. Manufacturers, types, and models of electrical and control devices.

d. Operational control descriptions and control logic.

1) Include I/O list and data point list for programmable controller;

include address locations for data points and other information to support programming of communication links to customer supplied systems.

2) Drawings of OIT screen displays.

e. Manufacturer's Installation Instructions: Provide connection requirements, installation procedures, and start-up instructions.

Revised 46 43 53 - 7

f. Schematic and wiring diagrams for all contractor supplied systems and components.

1) Includes conductor and raceway sizes for Contractor supplied components as well as customer interface to Contractor components.

g. Control panel and box layout drawings:

1) Include panel layout showing devices and components with component identification.

2) Layout drawing shall identify conduit entry locations as well as box and panel dimensions.

7. Factory acceptance testing procedures.

8. Manufacturer’s instructions for handling, storage, and installation including maintenance schedule. Installation instructions shall include installation details, detail dimensions, locations of connections, interconnecting piping, instrument locations, and tank orientations.

9. Field test procedures.

10. Warranty information.

C. RSN 46 43 53-2, Material Certification:

1. Certificates and Affidavits: Factory test certificates, including Contractor source quality testing specified herein. Furnish prior to shipment of materials.

D. RSN 46 43 53-3, Final Drawings and Data:

1. Typed and bound operations and maintenance manuals including previously approved information submitted and the following information:

a. Applicable test records or reports.

b. Final drawings.

c. All previously approved submittal data.

E. RSN 46 43 53-4, Storage Plan (if more than 3 months of storage is required):

1. Manufacturer’s instructions for handling and storage.

2. Storage location and environmental conditions.

3. Storage inspection frequency.

F. RSN 46 43 53-5, End of Warranty Inspection Letter:

1. Refer to Article 3.05.

1.05 QUALIFICATIONS

A. Manufacturer: Minimum 5-years’ experience engaged in business specified herein.

Revised 46 43 53 - 8

B. Equipment and all ancillary components: Designed, supplied and warranted as a unit item by single manufacturer or vendor.

C. Manufacturer’s Installation Representative(s): Minimum 5-years’ experience installing equipment:

1. Manufacturer-qualified field personnel to inspect final installation and perform start-up and testing of SCC System.

2. Field personnel shall demonstrate experience with installation, start-up, and operation of an SCC system of comparable size, application, and complexity.

D. Qualifications for Welding Inspectors, Welding Procedures, Welders, and Welding Operators:

1. For pipe welds, shall be qualified in accordance with ASME B31.3.

2. For tank welds, shall be qualified in accordance with ASME BPVC-IX or

API 650.

3. For carbon steel welds, shall be qualified in accordance with AWS D1.1.

4. For stainless steel welds, shall be qualified in accordance with AWS D1.6.

Pickling and passivation procedure of ASTM A380.

E. Certifications: Equipment supplier shall submit ANSI National Accreditation Board (ANAB) accredited ISO 9001 quality system certification.

1.06 DELIVERY, STORAGE, AND HANDLING

A. In accordance with Section 01 60 00 – Product Requirements and in accordance with the EPA's SmartWay program.

1.07 SITE CONDITIONS

A. General:

1. Equipment will be installed indoors at water treatment facility located approximately 1-mile north of Leadville, Colorado.

2. Electrical equipment, pumps, and motors shall be sized and derated for specified conditions:

a. Approximate elevation at site is 10,000-feet above mean sea level.

b. Equipment shall be suitable for specified installation configuration and environmental conditions and shall be suitable for continuous (24-hours/day) service.

B. Ambient Conditions:

1. Fluid temperature is expected to range from 35 to 45 degrees F.

2. Outdoor Air Temperature:

Revised 46 43 53 - 9

a. Winter: ASHRAE 99.6 percent Value of minus 8.6 degrees F.

b. Summer: ASHRAE 0.4 percent Value of 74 degrees F.

3. Outdoor Air Relative Humidity:

a. Winter: 3.1 percent.

b. Summer: 74 percent.

4. Indoor Air Temperature: 60 to 95 degrees F.

C. Seismic Loading Criteria:

1. Seismic Design Category B.

2. Site Class D.

3. Risk Category III.

4. Importance Factor, Ie: 1.25.

5. Mechanical Equipment Importance Factor, Ip: 1.0.

6. Design Spectral Response Acceleration at Short Periods (0.2 seconds), Ss: 0.307.

7. Design Spectral Response Acceleration at 1-second Period, S1: 0.076.

8. Approximate height in structure of point of attachment: 0-ft.

9. Approximate average roof height of structure: 55-feet.

D. Area Classification:

1. Work shall conform to requirements described below as well as referenced code requirements:

2. Corrosive Process Areas (NEMA 4X):

a. Areas requiring corrosion resistant, NEMA 4X, construction are indoor corrosive process areas.

b. Typically contain wastewater, chemicals, or sludge pumping or piping systems and are subject to spills and washdown.

c. Include areas containing chemicals.

1.08 WARRANTY

A. Base Warranty: In accordance with contract clause at FAR 52.246-18, Warranty of Supplies of a Complex Nature, provide warranty extending manufacturer’s standard warranty to 608 days after delivery.

B. Warranty Extension 1: Extend the Base Warranty for an additional 365 days.

C. Warranty Extension 2: Extend the Base Warranty plus Warranty Extension 1 period for an additional 365 days.

Revised 46 43 53 - 10

1.09 EXTRA MATERIALS

A. Spare Parts:

1. Provide new spare parts, not refurbished.

2. Properly packaged for long-term storage.

3. Furnish spare parts that are interchangeable with and of same materials and workmanship as corresponding original equipment parts.

4. Consistently and clearly mark or tag each part to identify size and type of component for which it is intended.

5. Furnish manufacturer’s recommended spare parts and the following spare parts at minimum:

a. Two complete sight glass assemblies, including glass, cranks, rings with coating finishes matching SCC System finish, and wipers.

b. Four sets of sight glass wipers.

c. One extra manway gasket per every manway, clearly labeled with corresponding location.

d. Two valves of each size present in provided system, including seals and necessary materials.

e. One pump discharge pressure indicating transmitter for sludge recycle pumps.

f. One pump discharge pressure indicating transmitter for sludge waste pumps.

g. One level transmitter.

h. One level switch.

i. Sufficient touch up coating primer and coating finishes for site assembly of SCC System process tanks.

j. One sealed 5-gallon container of coating primer.

k. One sealed 5-gallon container of coating finish.

l. Appurtenances present in provided system.

B. Special Tools: One set of special tools required for assembly and disassembly of equipment required to make equipment complete and ready for operation:

1. Tools of high-grade, forged alloy, tool steel.

2. Industrial grade container for storage of special tools and spare parts. Include in container list of furnished wrenches, tools, and accessories.

Revised 46 43 53 - 11

PART 2 PRODUCTS

2.01 SYSTEM DESCRIPTION

A. Refer to Figure 46 43 53-1 – General Process Diagram for location of SCC System within WTP.

B. Design, manufacture, and furnish complete SCC System with functionality and features as described in this section.

C. Equipment shall be designed to accomplish dispersion of added precipitation, oxidation and flocculation chemicals optimized in the presence of previously formed precipitate, clarification by gravity sedimentation, sludge thickening, and collection, recycling, and wasting of sludge.

D. Each SCC train shall include a Reactor Tank and a Clarifier. Process flow through SCC System shall be by gravity.

E. SCC System Access Platform for Each Train: Provide in accordance with Section 05 51 30 – Solids Contact Clarifier (SCC) Access Platforms.

F. Customer power supply voltages are 480-volt AC, 3-phase, 60 Hertz; 208-volt AC, 3-phase, 60 Hertz; 120-volt AC, 1-phase, 60 hertz; and 125-volt DC.

1. Contractor to provide equipment or components required to transform or adjust customer power supply voltages to desired equipment voltage. This includes all transformers, power supplies, electrical protection devices, and other components required.

2.02 PERFORMANCE REQUIREMENTS

A. Minimum Quantity of Trains for SCC System: Two (2).

B. Flow Rates:

1. Minimum and Average Flow Rates (850 gpm and 2,050 gpm, respectively) shall be able to be processed in one (1) SCC system train. Maximum Flow Rate (2,550 gpm) shall be able to be processed in two (2) SCC system trains. One (1) redundant SCC system train shall be available under Average Flow Rate.

C. Feed Water Quality:

1. Table 46 43 53A – Feed Water Quality summarizes water quality entering SCC

System.

Revised 46 43 53 - 12

Table 46 43 53A – Reactor Tank Feed Water Quality

Constituent Type Water Quality

Parameter Units Median Range

(min-max) General Alkalinity

(dissolved) mg/L as CaCO3

65 10-575

Hardness (total) mg/L as CaCO3

345 123-863 pH S.U. 9.9 8.5-11 Temperature Deg. F 44.6 35-75 Turbidity NTU 18 6-40

Inorganic Chemicals (dissolved)

Aluminum mg/L 0.04 0.02-7.00 Iron mg/L 1.67 1.27-18.76 Manganese mg/L 1.09 0.85-28.87

D. Equipment furnished shall consistently yield an effluent having less than 1 nephlometric turbidity unit (NTU) turbidity 95 percent of time or no greater than jar test results performed with identical water and chemical doses, when furnished equipment is operated at any flow rate between 50 and 100 percent of Average Flow Rate when water temperature is 35 degrees F or greater.

E. Design Requirements:

1. Equipment for each SCC System shall be furnished complete with all components and accessories necessary for an operating installation and shall include but not be limited to above-ground tankage, walkways/bridge with handrails that extends from tank perimeter and building mezzanine to access platform at center of each top of tank, draft tube, drive supports, drive units, reactor assembly, motorized sludge scraper assemblies, plate or tube settlers and supports, effluent launders and weirs, sludge sample piping and fittings, external sludge recycle pumping system, and external waste sludge pumping system.

2. Equipment shall be suitable for use under high pH scaling and high oxidation reduction potential conditions where precipitation and oxidation reactions occur and significant quantities of metal hydroxide, metal oxide and/or metal carbonate solids are removed from influent water through gravity separation coupled with optimal solids recycling and contact. Equipment shall be suitable for periodic yearly cleanings at pH of 2.0.

3. Rotating and vibrating equipment:

a. Provide rubber expansion joints when connecting to fixed piping systems compatible with expected water quality at location of use and expected solids concentration.

b. Vibration dampening or isolation devices shall be installed on all rotating equipment.

Revised 46 43 53 - 13

4. Piping:

a. Follow industry standards and ASME B31.3 for design, fabrication, assembly, inspection, and testing of piping systems.

b. Design pressure shall be based on maximum expected operating pressure plus design margin:

1) Design pressure shall be most severe condition of coincidental pressure and temperature expected during service life (including transients, surge, and upset conditions) resulting in greatest required pipe thickness and flange rating.

2) Each component (pumps, valves, pressure vessels, instruments, and other connected equipment) in piping system must have minimum pressure rating greater than design pressure.

c. Perform piping stress/flexibility analysis as required by AISC in accordance with ASME B31.3.

d. Provide air release valves, drains, blow offs, and sample taps as required:

1) Locate valves and pipe runs neatly and in organized manner.

2) Provide easy accessibility.

5. Valves:

a. Provide isolations valves at equipment to allow removing equipment for service and avoid draining of pipeline.

b. Provide manufactured industry standard valves that allow for lockout/tagout procedures. Where applicable provide lockable device in closed or open position. Provide isolation valves for service and replacements.

c. Pressure relief valves shall be provided to prevent over pressurization of piping systems.

d. Air relief valves shall be provided to remove pockets of air from systems.

e. Locate valves to minimize stagnant fluid.

f. Provide valve list with the following minimum requirements: Working pressures, pressure classes, and pressure-temperature ratings.

g. Include isolation valves on long pipe runs to avoid draining entire pipe system for repairs.

6. Drains and Vents:

a. Provide vent and drain lines as required to drain stagnant fluid from piping systems.

b. Provide drains and blow off valves at low points to flush sediment or drain entire line.

Revised 46 43 53 - 14

c. If drain lines are not feasible, provide other means for purging fluid from system during down time or outages.

7. Instrumentation:

a. Provide instrumentation for the following functions:

1) Detect abnormal operating conditions in SCC systems.

2) Protect equipment and facility from damage.

3) Support maintenance activities.

4) Provide sufficient feedback for automated operation of SCC systems.

b. Locate instrumentation so WTP operation is not impacted by isolating redundant process trains or redundant equipment.

c. Limit use of pneumatic controls. Use only where other conventional alternatives are not available.

8. Valves, instrumentation, and apparatuses to be installed in accessible locations.

9. Appurtenances for complete system in design and assembly of piping systems.

Including but not limited to:

a. Markers.

b. Pipe service and flow direction labeling.

c. Pipe supports.

d. Couplings.

e. Restraint harnesses.

f. Taps.

g. Injection assemblies.

10. Local, PLC based control panel:

a. Programming required for a fully functional system, including communication with components provided by others in accordance with Section 26 24 20 – Electrical and Control Panels.

b. Programming required to prevent simultaneous operation of SCC trains’ waste sludge pumps.

F. Footprint:

1. Maximum Equipment Footprint for SCC System: 4,600 square feet:

a. Refer to Figure 46 43 53-2 – Available Footprint for SCC System. Shaded area represents available footprint for SCC equipment. Shaded area is greater than specified Maximum Equipment Footprint. Ensure adequate

Revised 46 43 53 - 15 space surrounding equipment for typical operation, inspection and maintenance. Final layout subject to Government approval.

b. Coordinate final available footprint with Government in RSN 46 43 53-1.

c. Maximum train process sidewall height: 23-feet above finished floor.

G. Loading Criteria:

1. Design each SCC to accommodate all dead, live, and seismic loads as defined by

ASCE 7. Assume units are full of water when determining design loads. Include loading from equipment torsional forces and vibration as well.

2. SCC shall be designed to resist forces produced by load combinations as specified in ASCE 7.

3. Maximum allowable stress in a structural steel member shall not exceed those permitted by AISC 360.

4. All welding shall conform to latest standards of American Welding Society (AWS) and be performed by certified welders.

H. Each SCC System component will be installed by others on 6-inch tall concrete equipment pad.

2.03 SCC SYSTEM COMPONENTS

A. Tanks shall be hydraulically connected where level instrumentation in Reactor Tank shall be indicative of relative level in Clarifier.

B. Tanks shall be carbon steel, welded onsite by others. Coated in accordance with Article

2.09 Finishes and touched up as required onsite by others.

C. Tanks shall be installed on 6-inch concrete equipment pad installed by others.

D. Reactor Tank:

1. Provide one (1) Reactor Tank per train. Reactor Tank shall be prior to Clarifier.

Reactor Tank shall receive water with the following characteristics:

a. Influent water ranging between 8.5 and 11 pH.

b. Influent water pH controlled through sodium hydroxide dosing (by others). Universally dispersed sodium hydroxide dosed between 20 and 80 mg/L as NaOH.

c. Influent water oxidation-reduction potential controlled through sodium permanganate dosing (by others). Uniformly dispersed sodium permanganate dosed between 0-12 mg/L as NaMnOR4R.

d. Sludge recycled from Clarifier back to Reactor Tank inlet piping.

Revised 46 43 53 - 16

2. Reactor Tank:

a. Design to inject 0.10 percent of anionic polymer for flocculant aid at dose range of 0.03 to 0.25 mg/L.

b. Provide uniform polymer dispersion.

1) Piping inside Reactor tank shall provide a polymer injection location either above or below Reactor Tank Mixer impeller for effective dispersion through imparted mechanical energy in accordance with Reactor Tank Mixer’s and internal flow dynamic design. An exterior 1-inch flange connection for polymer feed shall be provided that connects to polymer injection location.

Polymer feed skid and connection piping will be by others.

3. Operational Criteria:

a. Complete mixing.

b. Hydraulic retention time, minimum: 11- to 15-minutes.

c. Impeller motor horsepower: 15 hp, maximum.

d. Impeller velocity gradient: 80 seconds-1, minimum.

4. Mixer:

a. Wetted parts shall be 304/304L stainless steel unless otherwise specified herein.

b. Mixer mount to include a recessed secondary containment sized to accommodate properly sized oil pan shall be located under mixer motor to capture spent oil and integrated into access platform support structure to prevent oil from spilling into Reactor Tank during oil changes.

1) Include access through removable grating.

c. Motor:

1) Impeller motor shall be mounted vertically above Reactor Tank and shall be accessible for inspection and maintenance via specified access platform.

2) Impeller motor shall be rated for inverter duty.

3) Totally enclosed fan cooled (TEFC).

4) NEMA MG 1 premium efficiency.

5) Power: 480-volt, 3 Phase, 60 Hertz.

6) Lockable local motor disconnect mounted on railing.

7) Local control with start/stop buttons located near local disconnect on railing.

5. Ancillary Equipment:

Revised 46 43 53 - 17

a. Vendor shall supply all instruments and controls required for complete and operational system.

b. Access way in Reactor Tank sidewall:

1) Minimum 36- by 36-inches with exterior handle and chemically compatible gasket. Manway hardware shall be 18-8 stainless steel bolts with compatible thread anti-seize.

2) Invert no more than 12-inches above tank floor.

3) Internal handle for operator stability during entry located 6-inches above sidewall crown.

4) Access way cover to be hinged or davited.

c. Reactor Tank shall have electronic level indicator that communicates water level at adjustable time intervals, can transmit the data to WTP Control System, and has local display and alarm:

1) Instrument shall be Rosemount 3100 series or equal:

a) Polyurethane covered aluminum.

b) Instrument shall be accessible from access platform.

c) Remote display shall be mounted on access platform handrailing.

d. Level switch shall be provided for process control to stop influent flow:

1) Instrument shall be Rosemount vibrating fork level switch or equal, accessible from access platform.

2) Fork materials of construction shall be 316/316L stainless steel.

3) Instrument shall be accessible and attached to access platform through height adjustable section of schedule 80 PVC pipe and flange connected to Unistrut.

4) Process connection shall be 1-inch ASME B16.5 Class 150 raised face flange.

5) Extended fork length to be sized for length from accessible Unistrut clamped location on access platform to crown of surface oil and scum skimmer.

e. Surface oil and scum skimmer:

1) Intercept and remove surface oil and scum from releasing from the

SCC and flowing to downstream processes.

2) 6-inch diameter pipe installed level and parallel to the ground at the water elevation.

3) Span the width of location where oil and scum could accumulate.

4) Open slots running the length of the pipe:

Revised 46 43 53 - 18

a) Slots are to be above water under normal operation and to be manually operated as required to remove oil and scum from access platform using a lever arm which rotates the pipe.

5) Skimmer pipe and associated hardware shall be 304/304L stainless steel.

6) Oil and scum discharge to be 6-inch flange connection on exterior of tank wall.

6. Piping Connections:

a. General: All tank connections shall be Class 150 flanged connections per

ASME B16.5, unless otherwise specified.

b. Reactor Tank shall have drainpipe connection at bottom of tank wall, minimum 4-inch diameter, and located to ensure complete drainage of tank:

1) Drain connection invert shall be minimum 3-inches above top of equipment pad.

2) Design tank base to accommodate placement of concrete fill at

1/4-inch per foot slope toward drainpipe crown during installation.

Coordinate fill requirements with Government during review of

RSN 46 43 53-1.

7. Anchorage to Slab: Minimum, Reactor Tank shall include 6 structural attachment points capable of transferring all dead, live (including operational), and seismic reactions for future connection to structural slab.

E. Clarifier:

1. Provide one (1) Clarifier per train. Clarifier shall be downstream from Reactor

Tank. Clarifier effluent shall flow by gravity to effluent tank (by others) to feed Membrane Treatment System.

2. Design Clarifier for:

a. Floc sedimentation for Clarifier’s sludge handling system.

b. Water rise rate to locate sludge blanket at optimal location for sludge recycle pump suction side intake.

c. Watertight condition during overflow condition with downstream valve closed for maximum design flowrate.

d. Wetted parts shall be 304/304L stainless steel unless otherwise specified herein.

3. Operational Criteria:

a. Hydraulic retention time, minimum: 0.7-hours.

Revised 46 43 53 - 19

b. Horizontal flow velocity: 0.3- to 0.8-feet per minute.

c. Surface plan view cross sectional loading rate: 2.0 to 4.8 gpm per square foot.

4. Clarifier shall have solids thickening zone with the following characteristics:

a. Bottom slope between 1:10 and 1:12.

b. Provide mechanical scraper consisting of 304 stainless steel shaft and two

(2) scraper arms. Blades shall be attached to scraper arms to facilitate settled sludge collection.

c. Clarifier scraper motor mount to include a recessed secondary containment sized to accommodate properly sized oil pan shall be located under mixer motor to capture spent oil and integrated into access platform support structure to prevent oil from spilling into Clarifier during oil changes.

1) Include access through removable grating.

d. Scraper Drive:

1) Completely factory assembled and tested in SCC manufacturer's shop to ensure drive is operating properly and to calibrate drive control.

2) Shall include gear motor, primary worm gear reducer, pinion gear, turntable type main spur gear, drive base, breaking pin hub coupling, alarm and shut-off switch, drive and driven sprockets, and drive chain with guard.

3) Bearings L-10 life of 100,000 hours.

4) Components shall be designed in accordance with AGMA standards for 24-hours per day continuous duty, moderate shock load, and 20-year design gear life.

5) Torque rating of drive shall be lower of values determined based on strength and durability in accordance with AGMA 2001.

6) Gear motor shall drive special, single reduction primary worm gear reducer through roller chain drive. Special worm gear reducer shall be constructed of cast 40,000 psi high-duty iron and shall have hardened and ground alloy steel worm, which operates in cast 40,000 psi high-duty iron gear case with oil fill, drain plugs and external grease fittings.

7) Additional sprockets and chain links shall be provided for multiple scraper tip speeds:

a) Provide galvanized steel or FRP chain guard suitable for all sprocket combinations.

Revised 46 43 53 - 20

b) Provision shall be made for manual adjustment of chain tension.

8) Entire sludge collector mechanism shall be suspended from turntable which shall be supported on ball bearing assembly that uses large diameter hardened steel bearing balls:

a) Bearing balls shall run in full contour raceways or in oil bath on replaceable tempered carbon spring steel inserts placed in annular raceways in gear and turntable base.

b) Felt seal and dust shield shall also be included with each spur gear housing to protect oil bath from contamination.

c) Gear case shall be complete with oil fill and drain line with plugs, as well as oil level indicator pipe.

d) Cast iron drive base shall be provided for mounting each drive unit.

9) Provide with torque overload protection system consisting of electromechanical overload device and backup shear pin with visual load indicator showing load on mechanism:

a) Overload device shall be designed to measure thrust of worm gear shaft and be provided with indicator showing load on mechanism.

b) Indicator shall be visible from access platform and shall cover range of torque specified up to peak rating.

e. Scraper motor shall be rated for inverter duty, mounted vertically above Clarifier, and accessible for inspection and maintenance via specified access platform:

1) Scraper motor horsepower: 5 hp, maximum.

2) Totally enclosed fan cooled (TEFC).

3) NEMA MG 1 premium efficiency.

4) Power: 480-volt, 3 Phase, 60 Hertz.

5) Lockable local motor disconnect mounted on railing.

f. Sludge shall be collected in sump for sludge recycling or sludge wasting.

g. Vendor shall supply all instruments and controls required for complete and operational system.

5. Plate or Tube Settlers:

a. Tube or plate settler depth to be designed for applicable surface loading rate.

b. Plate settlers shall be constructed of 304/304L stainless steel.

Revised 46 43 53 - 21

c. Plate settlers shall be angled at 60 degrees from horizontal.

d. Plate settler minimum effective settling area: 3,900 square feet.

e. Tube settlers shall be angled at 60 degrees from horizontal.

f. Tube settler maximum surface loading rate: 4.75 gpm per square foot of plan view cross sectional tube settler area.

g. Tube settlers shall have a minimum depth of 2 feet.

h. Tube settlers shall have an integral support structure in SCC allowing for removal and replacement.

i. Tube settler and plate settler support structure shall be able to withstand an increased loading due to scaling of ten times clean weight of newly installed tube settlers or 15 psf of wetted area on the plate settler support plus two-point loads of 250 pounds with appropriate factors of safety.

j. Tube settler clear span supports shall be constructed of 304 stainless steel.

k. Tube settler/plate settler reaction supports to be integrated into Clarifier tank wall design.

6. Collection Launders:

a. Launders shall be constructed of 304/304L stainless steel or FRP, minimum 1/4-inch nominal thickness, flat bottom, vertical sides:

1) Stainless steel in accordance with ASTM A240.

2) FRP laminate glass content: 20 percent ±3 percent by weight.

3) FRP resin fillers: 40 percent ±2 percent of resin mixture.

4) FRP physical properties:

a) Final laminate thickness: ±10 percent of nominal specified thickness.

b) Tensile strength (per ASTM D638): 14,000 psi.

c) Flexural strength (per ASTM D790): 25,000 psi.

d) Flexural modulus (per ASTM D790): 1,000,000 psi.

e) Impact, notched, Izod (per ASTM D256): 15 ft-lb/in.

f) Barcol hardness (resin-rich surface) (per ASTM D2583):

40 minimum, average.

g) Water absorption (per ASTM D570): 0.2 percent at

24-hours.

h) Coefficient of thermal expansion, average (per ASTM

D696): 0.0000105 in/in/degree F.

i) Test coupons prepared in accordance with ASTM D618.

Revised 46 43 53 - 22

j) Chemical resistance: Comply with ANSI/AWWA Fl01 (Troughs and Drop Boxes) or F102 (Weirs), Type II Classification.

b. Launders spanning the Clarifier and connecting with peripheral launder to deliver effluent flow:

1) Designed to support applied water loadings at each location.

2) Designed to resist deflection under full buoyant and gravity water loads with maximum upwards and downward deflection less than or equal to L/1000 where L equals unsupported trough length;

maximum deflection at midpoint not greater than 1/8-inch.

3) Solid 1-inch diameter spacer rods to maintain uniform trough width over trough length.

4) Slotted holes in troughs to allow minimum vertical level adjustment of 1-inch.

5) Launder connections constructed using watertight joints.

c. V-notch Clarifier weirs, 1/4-inch nominal thickness, minimum of 2-inches of vertical and horizontal adjustment, cover plates over bolt holes to prevent short water circuiting.

7. Ancillary Equipment:

a. Sight glasses shall be supplied as follows:

1) Minimum of four (4) sight glasses shall be bolted to Clarifier tanks at minimum distance of 1-foot between each starting from 4-feet above tank bottom or optimally located to visually determine the sludge blanket elevation.

2) Sight glasses shall be of circular design with 4-inch diameter.

3) Sight glasses shall include radial wipers on inside surface of lens and cranks for manual wiping action.

4) Minimum operational pressure range of minus 14.5 to plus 131 psi.

5) Sight glass inner ring shall be welded to Clarifier, outer ring shall be bolted to inner ring and be coated on both sides of sight glass.

6) Apply coatings to sight glass rings as to SCC tank components, ensuring sight glass rings still properly fit after coating.

7) Sight glass shall be shipped loose and in properly packed and labeled containers.

b. Minimum of five (5) flanged Clarifier ports per SCC train located at vertical elevations along tank wall with manual manifolded valves to draw optimal sludge concentrations from sludge blanket for sludge recycle pumps.

Revised 46 43 53 - 23

c. Minimum of five (5) 1-inch sample lines shall be provided with threaded 304 stainless steel isolation valves located at same elevations along Clarifier tank wall as sludge recycle pumps suction locations. Tubing shall be supplied to connect sample ports on tank wall and sample sink.

d. Sink shall have schedule 80 PVC sample valves mounted to 304 stainless steel sample sink, where bulkheads are used to backmount sample valves.

Sample valves are to have downspouts that drain directly into sink basin, where sink drain line is to adapt to 2-inch 150-pound flange fitting at finished floor, capable of rotation to any angle in plan view and be connected to drain by others.

e. Access way in Clarifier tank sidewall:

1) Minimum 36- by 36-inches with exterior handle, bolted and chemically compatible gasket. Manway hardware shall be 18-8 stainless steel bolts with compatible thread anti-seize.

2) Invert no more than 12-inches above tank floor.

3) Internal handle for operator stability during entry located 6-inches above sidewall crown.

4) Access way cover to be hinged or davited.

8. Anchorage to slab: Minimum, Clarifier shall include 6 structural attachment points capable of transferring all dead, live (including operational), and seismic reactions for future connection to structural slab.

9. Piping Connections:

a. General: Tank connections shall be class 150 flanged connections per

ASME B16.5 unless otherwise specified.

b. Flange hardware shall be 18-8 stainless steel bolts with compatible thread anti-seize.

c. Flange gasket materials shall be compatible with water quality and chemicals added to process.

d. Clarifier unit shall have drainpipe connection minimum of 12-inch diameter and located to ensure complete drainage of Clarifier.

e. Effluent piping connection, minimum 18-inch diameter, located minimum

15-feet above bottom of Clarifier.

F. Sludge Recycle System:

1. Provide minimum of one (1) duty and one (1) standby sludge recycle pump per

SCC train.

2. Operational Criteria:

a. Sludge recycle of 5 percent of flow through SCC.

Revised 46 43 53 - 24

b. Sludge recycle pump horsepower: 15 hp, maximum.

c. Minimum sludge recycle piping nominal diameter: 4-inch.

3. Pump Details:

a. Rotodynamic pump.

b. Materials:

1) Casing: Cast iron per ASTM A536.

2) Impeller/Rotors: Cast iron per ASTM A536.

3) Shaft: Type 316 stainless steel per ASTM A276.

4) Seals and Packing: Silicon carbide, tungsten carbide, FKM

(Viton), Nitrile, 316 stainless steel, PTFE.

5) Hardware: Type 316 stainless steel per ASTM A193 and A194.

6) Skid:

a) Coated ASTM A36 carbon steel.

b) Dissimilar metals on each pump skid shall be dielectrically isolated to suppress possible galvanic couples.

c) Minimum, each skid shall include four (4) structural attachment points capable of transferring all dead, live (including operational), and seismic reactions for future connection structural slab.

d) Each skid will be installed by others on 6-inch tall concrete equipment pad.

e) Each skid shall be provided with lifting lugs for pick points or should be able to be moved with fork lift.

c. Motors:

1) Totally enclosed fan cooled (TEFC).

2) NEMA MG 1 premium efficiency.

3) Power: 480-volt, 3 Phase, 60 Hertz.

4) Motor shall be rated for inverter duty.

5) Local disconnect for each motor.

4. Ancillary equipment and piping connections:

a. Vendor shall supply all instruments and controls required for complete and operational system.

b. Connections shall be class 150 flanged connections per ASME B16.5, unless otherwise specified.

Revised 46 43 53 - 25

c. Provide fittings, valves, and instrumentation in accordance with article titled Recycle and Waste Sludge Pump System Fittings, Valves, and Instrumentation herein.

5. All piping and components are to be factory installed and skid mounted.

6. Pumps must be factory hydrostatically tested in accordance with Hydraulic

Institute standards.

G. Waste Sludge Pumps:

1. Vendor shall supply minimum of one (1) duty and one (1) standby Waste Sludge pump per SCC train.

2. Operational Criteria:

a. Pump to provide adequate discharge head for static height of 20-feet and pipe length of 175-feet.

b. Waste sludge pump horsepower: 15 hp, maximum.

c. Maximum waste sludge discharge piping nominal diameter: 3-inch.

3. Pumps:

a. Positive displacement or rotodynamic pump.

b. Materials:

1) Casing: Cast iron per ASTM A536.

2) Impeller/Rotors: Cast iron per A536.

3) Shaft: Type 316 stainless steel per ASTM A276.

4) Seals and Packing: Silicon carbide, Tungsten carbide, FKM

(Viton), Nitrile, 316 SS, PTFE.

5) Hardware: Type 316 stainless steel per ASTM A193 and A194.

6) Skid:

a) Coated ASTM A36 carbon steel.

b) Dissimilar metals on each pump skid shall be dielectrically isolated to suppress possible galvanic couples.

c) Minimum, each skid shall include four (4) structural attachment points capable of transferring all dead, live (including operational), and seismic reactions for future connection structural slab.

d) Each skid will be installed by others on a 6-inch tall concrete equipment pad.

e) Each skid shall be provided with lifting lugs for pick points or be able to be moved with a forklift.

Revised 46 43 53 - 26

c. Motors:

1) Totally enclosed fan cooled (TEFC).

2) NEMA MG 1 premium efficiency.

3) Power: 480 Volt, 3 Phase, 60 Hertz.

4) Motor shall be rated for inverter duty.

4. Local disconnect for each motor.

5. Ancillary Equipment:

a. Vendor shall include all instruments and controls required for a complete and operational system.

b. Connections shall be class 150 flanged connections per ASME B16.5, unless otherwise specified.

c. Provide fittings, valves, and instrumentation in accordance with the article titled Recycle and Waste Sludge Pump System Fittings, Valves, and Instrumentation herein.

6. All piping and components are to be factory installed and skid mounted.

7. Pumps must be factory hydrostatically tested in accordance with Hydraulic

Institute standards.

H. Recycle and Waste Sludge Pump System Fittings, Valves, and Instrumentation:

1. Provide the following fittings, valves, and instrumentation for each sludge pump system. Coordinate location and configuration with Government during review of

RSN 46 43 53-1:

a. Instrumentation on each sludge pump system to be skid mounted.

b. Skid boundary piping interfaces shall be skid mounted Class 150 flanges per ASME B16.5 with access for bolt removal.

c. Install a minimum of one union on each pump suction and discharge pipe to allow for pump replacement without destructively deconstructing piping.

d. On sludge pump suction piping, provide one (1) plug valve close to Clarifier wall.

e. On sludge pump suction piping, provide one (1) cross between Clarifier and sludge flow splitting tee. Install one (1) plug valve on each cross branch for manual flushing connections. Install a 2-inch aluminum male cam lock fitting on one cross branch to allow manual transfer of solids between SCC units via temporary hoses. The second cross branch will connect to service water piping by others.

f. On sludge pump suction piping, provide one (1) tee to split sludge flow to each pump.

Revised 46 43 53 - 27

g. On each sludge pump’s suction piping, provide one (1) plug valve between each sludge flow splitting tee and corresponding sludge pump.

h. On each sludge pump’s discharge piping, provide one (1) tee with one (1) plug valve installed on the branch. The branch is for diaphragm seal with pressure indicating transmitter and pressure local indicator gauge.

1) One (1) diaphragm seal to protect indicator from solids fouling:

a) Metallic wetted materials shall be type 316 stainless steel.

b) Elastomer wetted materials shall be nitrile rubber (NBR) or

Viton (fluorocarbon rubber) unless otherwise required for compatibility with process material.

c) In-line full stream captive sensing liquid type.

d) Maximum of…