12R0040-SPECS-AM5.pdf

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 items 8 and 15, and returning or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT 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 your desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

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

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE

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

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

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICITATION

NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended, is not extended.

12. ACCOUNTING AND APPROPRIATION DATA (If required) copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NO.

IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

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

15C. DATE SIGNED

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

16C. DATE SIGNED

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

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

PAGE OF PAGES

6. ISSUED BY CODE

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

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

NSN 7540-01-152-8070

Previous edition unusable

W912BU

Waste Water Treatment Plant Upgrade, Tobyhanna Army Depot, Tobyhanna, Pennsylvania

THIS AMENDMENT DOES NOT EXTEND THE PROPOSAL DUE DATE OF 11 SEPTEMBER 2012 AT 2:00PM EST.

(CONTINUED)

E5CTCMNE

U.S. Army Engineer District, Philadelphia Contracting Division-Room 643 Wanamaker Building, 100 Penn Square East Philadelphia, Pennsylvania 19107-3390

U.S. Army Engineer District, Philadelphia POC: Michele Evans Wanamaker Building, 100 Penn Square East Philadelphia, Pennsylvania 19107-3390

W912BU-12-R-0040

08/30/2012

07/27/2012

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Amendment No. 0005

RFP W912BU-12-R-0040

14. DESCRIPTION OF AMENDMENT (continued)

a. SPECIFICATIONS:

(1) Section 00700 – CONTRACT CLAUSES: Please delete pages INDEX 00700-3 and 00700-125 in their entirety and substitute revised pages INDEX 00700-3 and 00700-125, annotated Amendment No. 0005, attached hereto.

(2) Section 44 40 00 – SEQUENTIAL BATCH REACTOR (SBR) SYSTEM: Please delete Section 44 40 00 in its entirety and substitute revised Section 44 40 00, annotated Amendment No. 0005, attached hereto.

(3) Section 44 44 73 – ULTRAVIOLET DISINFECTION EQUIPMENT: Please delete Section 44 44 73 in its entirety and substitute revised Section 44 44 73, annotated Amendment No. 0005, attached hereto.

(4) Section 44 46 00 – PUMPS, MOTORS, AND CONTROLS; SEWAGE AND SLUDGE: Please delete Section 44 46 00 in its entirety and substitute revised Section 44 46 00, annotated Amendment No. 0005, attached hereto.

(5) Section 44 46 01 – UTILITY WATER BOOSTER PUMP SYSTEM: Please delete Section 44 46 01 in its entirety and substitute revised Section 44 46 01, annotated Amendment No. 0005, attached hereto.

b. Please indicate receipt of this amendment on Standard Form 1442 (SOLICITATION, OFFER, AND AWARD) as Amendment No. 0005. Failure to acknowledge all amendments may be cause for rejection of the offer.

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W912BU-12-R-0040 INDEX 00700-3

52.242-13 Bankruptcy JUL 1995 52.242-14 Suspension of Work APR 1984 52.243-4 Changes JUN 2007 52.244-6 Subcontracts for Commercial Items DEC 2010 52.246-12 Inspection of Construction AUG 1996 52.246-21 Warranty of Construction MAR 1994 52.248-3 Value Engineering-Construction OCT 2010 52.249-2 Alt I Termination for Convenience of the Government (Fixed-

Price) (Apr 2012) - Alternate I

SEP 1996

52.249-10 Default (Fixed-Price Construction) APR 1984 52.249-5000 Basis for Settlement of Proposals APR 2000 52.253-1 Computer Generated Forms JAN 1991 252.201-7000 Contracting Officer's Representative DEC 1991 252.203-7000 Requirements Relating to Compensation of Former DoD

Officials

SEP 2011

252.203-7001 Prohibition On Persons Convicted of Fraud or Other Defense- Contract-Related Felonies

DEC 2008

252.203-7002 Requirement to Inform Employees of Whistleblower Rights JAN 2009 252.204-7000 Disclosure Of Information DEC 1991 252.204-7003 Control Of Government Personnel Work Product APR 1992 252.204-7004 Alt A Central Contractor Registration Alternate A SEP 2007 252.204-7006 Billing Instructions OCT 2005 252.205-7000 Provision Of Information To Cooperative Agreement Holders DEC 1991 252.209-7004 Subcontracting With Firms That Are Owned or Controlled By

The Government of a Terrorist Country

DEC 2006

252.215-7000 Pricing Adjustments DEC 1991 252.223-7004 Drug Free Work Force SEP 1988 252.223-7006 Prohibition On Storage And Disposal Of Toxic And

Hazardous Materials

APR 2012

252.225-7012 Preference For Certain Domestic Commodities JUN 2010 252.226-7001 Utilization of Indian Organizations and Indian-Owned

Economic Enterprises, and Native Hawaiian Small Business Concerns

SEP 2004

252.227-7021 Rights In Data--Existing Works MAR 1979 252.227-7022 Government Rights (Unlimited) MAR 1979 252.227-7023 Drawings and Other Data to become Property of Government MAR 1979 252.227-7024 Notice and Approval of Restricted Designs APR 1984 252.227-7025 Limitations on the Use or Disclosure of Government-

Furnished Information Marked with Restrictive Legends

MAR 2011

252.227-7033 Rights in Shop Drawings APR 1966 252.232-7003 Electronic Submission of Payment Requests and Receiving

Reports

MAR 2008

252.232-7010 Levies on Contract Payments DEC 2006 252.236-7000 Modification Proposals-Price Breakdown DEC 1991 252.236-7001 Contract Drawings, and Specifications AUG 2000 252.236-7006 Cost Limitation JAN 1997 252.243-7001 Pricing Of Contract Modifications DEC 1991 252.243-7002 Requests for Equitable Adjustment MAR 1998 252.247-7023 Transportation of Supplies by Sea MAY 2002 252.247-7024 Notification Of Transportation Of Supplies By Sea MAR 2000 52.211-6 Brand Name or Equal Aug 1999

W912BU-12-R-0040 INDEX 00700-4

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W912BU-12-R-0040 00700-125

(C) Are commissary or exchange cargoes transported outside of the Defense Transportation System in accordance with 10 U.S.C. 2643.

(End of clause)

52.249-5000 BASIS FOR SETTLEMENT OF PROPOSALS

Actual costs will be used to determine equipment costs for a settlement proposal submitted on the total cost basis under FAR 49.206-2(b). In evaluating a terminations settlement proposal using the total cost basis, the following principles will be applied to determine allowable equipment costs:

(b) Actual costs for each piece of equipment, or groups of similar serial or series equipment, need not be available in the contractor's accounting records to determine total actual equipment costs.

(c) If equipment costs have been allocated to a contract using predetermined rates , those charges will be adjusted to actual costs.

(3) Recorded job costs adjusted for unallowable expenses will be used to determine equipment operating expenses.

(4) Ownership costs (depreciation) will be determined using the contractor's depreciation schedule (subject to the provisions of FAR 31.205-11).

(5) License, taxes, storage and insurance costs are normally recovered as an indirect expense and unless the contractor charges these costs directly to contracts, they will be recovered through the indirect expense rate. (End of Clause)

52.211-6 -- Brand Name or Equal (Aug 1999)

(a) If an item in this solicitation is identified as “brand name or equal,” the purchase description reflects the characteristics and level of quality that will satisfy the Government’s needs. The salient physical, functional, or performance characteristics that “equal” products must meet are specified in the solicitation.

(b) To be considered for award, offers of “equal” products, including “equal” products of the brand name manufacturer, must—

(1) Meet the salient physical, functional, or performance characteristic specified in this solicitation;

(2) Clearly identify the item by—

(i) Brand name, if any; and

(ii) Make or model number;

(3) Include descriptive literature such as illustrations, drawings, or a clear reference to previously furnished descriptive data or information available to the Contracting Officer; and

(4) Clearly describe any modification the offeror plans to make in a product to make it conform to the solicitation requirements. Mark any descriptive material to clearly show the modification.

(c) The Contracting Officer will evaluate “equal” products on the basis of information furnished by the offeror or identified in the offer and reasonably available to the Contracting Officer. The Contracting Officer is not responsible for locating or obtaining any information not identified in the offer.

(d) Unless the offeror clearly indicates in its offer that the product being offered is an “equal” product, the offeror shall provide the brand name product referenced in the solicitation.

W912BU-12-R-0040 00700-126

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SECTION 44 40 00

SEQUENTIAL BATCH REACTOR (SBR) SYSTEM

PART 1 GENERAL

1.1 REFERENCES

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

ASTM INTERNATIONAL (ASTM)

ASTM A 48 (1994ae1) Gray Iron Castings

ASTM A 126 (2004) Gray Iron Castings for Valves, Flanges, and Pipe Fittings

ASTM A 240/A 240M (2004ae1) Chromium and Chromium Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels for General Applications

ASTM A 276 (2005) Stainless Steel Bars and Shapes

ASTM A 380 (1999e1) Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems

ASTM A 582/A 582M (1995b; R 2000e1) Free Machining Stainless Steel Bars

ASTM D 1171 (1999) Rubber Deterioration - Surface Ozone Cracking Outdoors or Chamber (Triangular Specimens)

ASTM D 1784 (2008) Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC) Compounds

ASTM D1785 (2006) Standard Specification for Poly(Vinyl Chloride) (PVC), Plastic Pipe, Schedules 40, 80, and 120

ASTM D 2240 (2005) Rubber Property - Durometer Hardness

ASTM D2466 (2006) Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40

ASTM D 3915 (1999ae1; R 2004)Rigid Poly(Vinyl Chloride) (PVC) and Chlorinated Poly(Vinyl Chloride) (CPVC) Compounds for Plastic Pipe and Fittings Used in Pressure

Section 44 40 00 Page 1

Applications

ASTM D412 (2006ae2) Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension

ASTM D 573 (2004) Rubber Deterioration in an Air Oven

1.2 SUBMITTALS

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

submittals not having a "G" designation are for Contractor Quality Control approval. The following shall be submitted in accordance with Section

01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Installation; G

Drawings showing fabrication methods, assembly, accessories, installation details and point-to-point wiring diagrams;

instrumentation and controls; equipment; dimensions; make and model; materials of construction; and installation instructions.

Drawings shall indicate clearances required for maintenance and operation and shall also contain complete wiring and schematic diagrams, equipment layout, dimensions, templates and directions for the installation of anchor bolts and other anchorages and any other details required to demonstrate that the system has been coordinated and will properly function as a unit.

SD-03 Product Data

Positive Displacement Blowers; G Air Control Valves; G

Fine Bubble Aeration; G Submersible Mixers; G Decant Mechanism; G Pumps; G Control Panel; G Tertiary DrumFilters; G Motor Control Center; G SCADA System; G Dissolved Oxygen Control System; G Portable Suspended Solids System; G SRT Control System; G

Manufacturer's descriptive data, technical literature, and catalog cuts. Submittal shall include: design calculations relevant to the type of system proposed indicating removal performance retention and operating times, operating scenarios (normal flow, storm flow, nitrogen and phosphorous removal, etc.) pump curves, horsepower, duty point, blower curves, CFM output, break horsepower and pressure range installation list; manufacturer's illustrations; and a statement by the equipment manufacturer listing any exception to or deviations from the contract drawings and specifications.

Equipment booklet including:

Section 44 40 00 Page 2

1. Equipment data sheets

2. Performance data including oxygen transfer calculations.

3. Headloss calculations and pressure requirements.

4. Descriptive literature and bulletins.

5. Operation data for a minimum of 3 SBR installations using the proposed equipment. Installations must be for systems of similar capacity and operating for a minimum of 5 years.

6. Customer contact for the 3 installations listed herein.

SD-06 Test Reports

Test Reports; G

SD-07 Certificates

Performance Certificate; G

SD-10 Operation and Maintenance Data.

Operation and Maintenance Manual;

Six complete copies of operating instructions outlining the step-by-step procedures required for system startup, normal operation, short- and long-term deactivation, and shutdown. An introduction and overall equipment description, purpose, functions, and simplified theory of operation shall be included in the beginning of the instructions. Instructions shall include the manufacturer's name, model number, service manual, parts list, and brief description of each piece of equipment and its basic operating features. Instructions shall include component layouts, simplified wiring, and control diagrams for the system as installed. Performance test data shall be reflected in the operating instructions.

Six complete copies of maintenance instructions listing routine maintenance procedures, calibration procedures, possible breakdowns and repairs and trouble shooting guides, prior to the start of the training course.

Each manual shall have an index listing the contents and tab separators between sections. Manuals shall be bound in sturdy three-ring, loose-leaf binders.

1.3 SCOPE OF WORK

All references to specific manufacturers' products/systems listed within this section are intended to indicate the basis of design only.

Products/systems from other manufacturers that meet all requirements of the specification will be acceptable.

Furnish, deliver, and install a new and complete continuous flow SBR Treatment System including Digester Basin Equipment, Effluent Equalization Pumps, Tertiary DrumFilters and Control Integration.

The system shall include the necessary equipment and controls to provide an operating treatment system complete with air control valves, SBR and Digester blowers, SBR and Digester air diffusion equipment, decant mechanisms, waste sludge pumps, digested sludge pumps, effluent EQ pumps, Section 44 40 00 Page 3 submersible mixers, control panel, motor control center (w/ VFD's), D. O.

control, SRT Control System and SCADA system. SBR Supplier shall also furnish tertiary DrumFilters. SBR supplier shall provide installation and start-up assistance training, and guarantee the process and equipment performance.

It is the intent of these specifications that a single manufacturer-supplier, regularly engaged in the design, manufacture, assembly and production of continuous flow SBR systems of the type specified, shall have complete responsibility for the final design, furnishing, coordination, assembly and installation supervision of all components in the treatment system. It is also intended that such a manufacturer-supplier make all adjustments, alterations, replacements, modifications as necessary to meet the Pennsylvania Department of Environmental Protection (PADEP) Water Quality Management Permit that has been established for this project, and tests specified and required, for a complete, satisfactory, and trouble-free operating installation.

Working drawings, including arrangement and erection drawings of the equipment and control equipment; schematic control diagrams, electrical connection diagrams, and complete description of the control systems; and equipment operating characteristics shall all be furnished. The bid drawings are preliminary. After receipt of notice to proceed, the Contractor shall submit certified drawings showing final placement of concrete piers, anchor bolts, and other embedded items for the equipment furnished.

Manufacturer shall supply the following equipment included in this specification section:

Positive Displacement Blowers Air Control Valves

Fine Bubble Aeration Submersible Mixers Decant Mechanism Pumps Control Panel Tertiary DrumFilters Motor Control Center SCADA System Dissolved Oxygen Control System Portable Suspended Solids System SRT Control System

1.4 QUALITY CONTROL

Paragraph deleted.

Provide equipment furnished by a single manufacturer qualified and experienced in the production of the continuous flow Sequential Batch Reactors.

Provide detailed structural, mechanical, and electrical drawings and equipment lists and all special features of the system proposed to be furnished and installed for the Government's approval. Changes to the design based on the proposed system, shall be submitted in accordance with requirements for variations as required in Section 01 33 00 SUBMITTAL

Section 44 40 00 Page 4

PROCEDURES.

Paragraph deleted.

Variations, if approved, shall be accomplished at no additional cost to the Government. The CONTRACTOR shall assume the cost of, and responsibility for, satisfactorily accomplishing the necessary structural, mechanical, piping, and electrical changes required by the proposed system as approved by the Government.

The submittal shall include the following:

a. Detailed drawings and equipment list signed and sealed by a professional engineer licensed to practice in the State of Pennsylvania.

b. Details of the diffuser element, diffuser element holder, retainer, gasket, and orifice.

c. Details showing how the diffuser element holder is attached to the distribution header.

d. Details of the Effluent decanter.

e. Details of the stainless steel manifold supports and the stainless steel distribution supports (guide and fixing).

f. Details of the distribution header expansion joints and fixed joints.

g. Engineering reports stating clear water oxygen transfer efficiency, including description of test facility, methods of sampling, and calculations and certified oxygen transfer curves.

h. Deleted.

i. A statement of the equipment manufacturer listing any deviations or exceptions taken to these specifications. Include specification reference and proposed alternative with reason stated for exception.

j. Deleted.

PART 2 PRODUCTS

2.1 SBR PROCESS DESCRIPTION

The system has been designed based on timed, batch mode SBR operation.

Each basin will undergo periods of fill, react, settle and decant on a cyclical basis. Solids liquid separation shall occur during a settling phase of the cycle. After the settling phase, treated effluent shall be decanted or withdrawn from the liquid surface.

SBR basins shall also include a baffle wall to facilitate single-basin operation during periods when one of the basins is out of service for maintenance. Baffle wall must be provided for all Manufacturers.

Section 44 40 00 Page 5

The functions of flow equalization, biological oxidation, nitrification, sedimentation and aerobic sludge stabilization shall all be carried out in a single basin.

2.2 INFLUENT WASTEWATER CHARACTERISTICS

Average Daily Flow: 0.9 MGD Peak Daily Flow: 1.35 MGD Peak Hourly Flow: 1.8 MGD BOD5: 185 mg/l Suspended Solids: 265 mg/l TKN: 32 mg/l Phosphorus: 5.8 mg/l Temperature Range (Water): 12 - 20 C Temperature Range (Air): 20 - 90 F Site Elevation: 1,965 Feet

2.3 EFFLUENT QUALITY REQUIREMENTS

The following effluent limits shall be on a 30-day arithmetic average:

BOD5: 25 mg/l Suspended Solids: 30 mg/l Ammonia Nitrogen NH3-N: 2 mg/l Nitrate/Nitrite: 10 mg/l Total Phosphorus: 1 mg/l (w/ chemical precipitation)

The SBR has been designed on the assumption that the wastewater does not contain any threshold concentration of inorganic pollutants that are inhibitory to biological treatment processes. Appendix A lists these threshold concentrations as published by the United States Environmental Protection Agency.

2.4 PROCESS DESIGN

In order to achieve specified effluent quality, the SBR process has been designed using the following parameters:

F/M Ratio: 0.04 Lb BOD/lb MLSS/day SVI (After 60 Minutes) 150 Ml/g Cycle Times Normal 5 - 4.8 hour cycles/day Storm 6.67 - 3.6 hour cycles/day Decant Time Normal 72 Minutes Storm 54 Minutes Waste Sludge Produced (Approximate 665 Lb/day/basin MLSS at Bottom Water Level 5,276 Mg/l

The SBR and Digester Basins have been configured as follows:

SBR Digester Number of Basins: 2 2 Width/Basin (ft): 35.00 35.00 Length/Basin (ft): 105.00 51.33 Water Depth at Top Water Level (ft): 18.00 18.00

Section 44 40 00 Page 6

Water Depth at Bottom Water Level (ft): 14.32

The multiple basin SBR design, which utilizes the process parameters described in this specification, provides the ability to operate with one basin out of service, while maintaining F/M ratios and cell residence time within the endogenous respiratory phase of the biomass. This capability is useful for short time periods such as during basin and equipment maintenance.

It is understood that headworks consisting of screening and grit removal facilities are to be provided. In order for this system to function as designed, influent screening facilities have a maximum of 1/2" opening should be provided.

2.5 POSITIVE DISPLACEMENT BLOWERS

2.5.1 Scope of Work

Provide all labor, material and equipment to furnish and install six (6) complete sets of positive displacement blower systems as specified herein and detailed on the drawings for the SBR and Digester basins.

This specification covers general requirements for the design, fabrication and testing of blower units and their appurtenances.

Blower and accessories shall be furnished as a complete assembled package and must include all interconnecting piping, instrumentation and supports needed to ship the assembly as a complete unit. The blower packager shall be able to show that similar units have been in successful operation for five years.

Part numbers or trade names are only used in the body of this specification to establish a level of quality and in no way imply that equipment of other approved manufacturers cannot be used.

Each blower package shall include the following components:

1. Positive displacement blower

2. Motor with slide base

3. V-Belt drive

4. Flexible expansion joints

5. Drive guard

6. Common elevated structural steel base

7. Inlet filter

8. Inlet silencer

9. Discharge silencer

10. Pressure relief valve

11. Check valve

12. Discharge isolation valve

13. Pressure gauge (discharge)

14. Pressure gauge (inlet vacuum)

15. Temperature gauge (discharge)

16. Pressure switch (discharge) (optional)

17. Vibration isolator pads

18. Spare parts

19. Motor Overtemperature Switch

Section 44 40 00 Page 7

2.5.2 Related work

1. Air Control Valves

2. Fine Bubble Aeration

3. Control Panel

4. Dissolved Oxygen Control System

2.5.3 Design Data

Application: SBR Digester Number of Assemblies 2 2 Labeling SBR 1, Digester 1 SBR 2, Digester 2

Air Flow, SCFM1 540 970 Discharge Pressure, psig 8.5 8.8 Site Temperature, °F 100 100 Site Elevation, MSL 1,965 1,965 Site Relative Humidity, % 65% 65% Design Break HP 33.0 62.6 Inlet Silencer Diameter, in 6 6 Outlet Connection Diameter, in 6 6 Blower Model Gardner Gardner and Nameplate HP Denver Denver (Basis of Design 4512 4518 or approved equal). Duroflow Duroflow

40 HP 40 HP

Notes: SCFM defined at Sea level, 68 deg F, 36% relative Humidity

2.5.4 Guarantee and Warranty

The equipment shall be guaranteed to meet or exceed the design criteria detailed in Part(s) 3.03 (and 3.04).

Supplier shall warrant all equipment furnished to be free from defects in materials and workmanship under normal use and service for a period of twelve (12) months after the date first placed in service, or eighteen (18) months after delivery, whichever occurs first.

2.5.5 Shipping

All equipment supplied for each blower package, with the exception of inlet filters, shall be assembled and shipped as one package from the factory.

2.5.6 Blower Construction

Blower shall be vertically mounted, positive displacement rotary type with top inlet and bottom outlet.

Blower shall be V-belt driven by a motor.

All bearings shall be anti-friction type rated by AFBMA standards to have a B10 life of 60,000 hours at design speed and maximum radial and thrust load conditions.

Operating conditions and blower characteristics are provided in Parts 10.03 (and 10.04).

Section 44 40 00 Page 8

All inlet and outlet air piping shall be installed so that no weight or strain will be imposed on the blower or silencers.

All gauges and instruments are to be package mounted with all necessary tubing and hardware unless otherwise shown on the drawings. Location, height and angle shall allow ease in viewing by a standing operator.

2.5.7 Positive Displacement Blowers

Casing shall be made of high grade, close-grained cast iron, annealed for stress relief and heavily ribbed to prevent distortion. The casing shall be of one-piece construction for positive bearing alignment, with separate head plates for easy access.

2.5.8 Rotors and Shafts

Each rotor and shaft shall be made of high grade ductile iron, heat treated for stress relief and machined to close tolerances. The rotors shall be of the straight, two lobe involute type and shall operate without rubbing, liquid seals or lubrication.

2.5.9 Gears and Bearings

Both rotors shall be positively timed by a pair of accurately machined, heat treated ground alloy steel, spur or helical tooth timing gears. The timing gears shall be mounted on the impeller shafts and secured. Each rotor shaft shall be supported by cylindrical roller or ball bearings sized for a minimum of 60,000 hours B10 life.

2.5.10 Lubrication and Seals

The lube oil system shall be supplied with a sight glass and ample reservoir capacity. Provide a lip type oil seal at each bearing, designed to prevent lubricant from leaking into the air stream.

The timing gears and gear end bearings shall be splash oil lubricated from an oil reservoir and slingers mounted on the driven shaft. Drive end bearings shall be grease lubricated.

2.5.11 Base

The blower motor, inlet silencer, discharge silencer, valves and instruments shall be mounted on a common elevated structural steel base of sufficient stiffness to prevent flexing. Silencers must be adequately supported to prevent any distortion to the blower flanges.

2.5.12 Drive System

Each blower shall be driven by a multiple V-belt drive system with a 1.4 service factor. A two-part OSHA approved drive guard shall be provided for each blower.

2.5.13 Motor

Each blower shall be equipped with an electric motor designed, manufactured, and tested in accordance with the latest revised edition of NEMA MG-1. The motor shall be a squirrel-cage induction type, single-speed, horizontally mounted motor conforming to the following:

Section 44 40 00 Page 9

1. Synchronous speed: 1800 RPM

2. Voltage, phase, & frequency: 460 Volts, 3 Phase, 60 Hz

3. Insulation: Class B or better

4. Enclosure: TEFC or ODP

5. Service factor: 1.15

6. Duty cycle: Continuous

7. Ambient temperature rating: 40 C

8. Starting method: Full voltage, across the line

9. Bearing lubrication: Manufacturer's standard

10. Bearing life: 50,000 hours rating life as defined by AFBMA Standards

11. High efficiency design

12. Motor windings shall have embedded, normally closed thermal switch that will open upon excessive temperature.

2.5.14 Accessories

Each blower shall be furnished with the following accessory items.

a. Expansion joints shall be reinforced rubber of the spool or sleeve type to match sizes as shown on the drawings. The expansion joints shall be capable of withstanding the following temperatures:

1. On the suction side of the blower: 150 F

2. On the discharge side of blower: 250 F (minimum)

b. Intake Filter

1. Each blower shall be furnished with a dry type element inlet filter complete with weather hood for outside installation (if applicable).

2. Filters for blowers shall have a flanged connection rated at 120% of design flow.

3. Filter to remove 98% of particles 10 microns and larger with a maximum pressure drop of 3" water column.

c. Inlet Silencers

1. The inlet silencers shall be of heavy duty, welded steel construction, two chamber-absorptive type, with flanged or threaded connections and side outlet. The silencers shall provide attenuation suitable for critical pitch line velocity applications.

2. Inlet connection ANSI 125/150 lb. drilled flange for connection to air intake (threaded optional).

Section 44 40 00 Page 10

3. Outlet connection ANSI 125/150 lb. drilled flange for connection to blower intake flange (threaded optional).

4. Supports: Provide two, carbon steel, clamp-type supports at each end of silencer for rigidly mounting silencer horizontally to the blower package frame.

d. Discharge silencers

1. The discharge silencers shall be of heavy duty, welded steel construction, two chamber-absorptive type with flanged or threaded connections and side inlet. The silencers shall provide attenuation suitable for critical pitch line velocity applications.

2. Inlet connection shall ANSI 125/150 lb. drilled flange for connection to piping system flexible connector.

3. Outlet connection shall be ANSI 125/150 lb. drilled flange for connection to piping system flexible connector (threaded optional).

4. Supports: Provide two (2) carbon steel, clamp-type supports at each end of horizontal silencer for rigidly mounting to the blower package frame.

e. Pressure Relief Valves

1. Provide a spring (up to 2-inch only) or weighted discharge pressure relief valve installed on the discharge silencer. Set the valve to relieve one and one half (1.5) psig above the blower operating pressure. Relief valve to be tested during shop performance test.

f. Check Valve

1. Provide wafer or threaded steel body, split disc type check valve for mounting in blower discharge piping. Furnish valve with 304 SS spring and EPDM seat.

g. Discharge Butterfly Valve

1. Provide wafer body, resilient-seated, lever operated, tight closing butterfly valve for positively isolating the blower from discharge manifold piping. Furnish with cast iron body, ductile iron disc, EPDM seat. Valve to have lever handle with notched plate. Valves 10" and larger to have gear operator and handwheel. Valves 2" and smaller may be 2 piece ball valves.

h. Vibration Isolator Pads

1. Provide molded, synthetic rubber and cork vibration isolation pads for each blower, sized to fit the structural steel base.

i. Inlet Vacuum Gauge

1. Provide a Model 2020 differential pressure gauge to indicate pressure drop through the air filter.

Section 44 40 00 Page 11

j. Discharge Pressure Gauge

1. Provide a liquid filled pressure gauge.

k. Temperature gauge(s)

1. Provide a liquid filled bimetal thermometer or equal.

l. High temperature shut-down switch (optional)

1. The switch shall have an operating range of 150 F to 260 F.

The maximum temperature rating shall be 400 F. Sensor is to be capillary type with remote 3 3/4" brass bulb. Supplier to provide 1/2" FPT in discharge silencer for thermostat well. Silencer sizes under 4 inches will require a tee with bushings to mount the well.

2.5.15 Spare Parts

The equipment supplier shall deliver the following spare parts for each blower size:

1. One (1) set of bearings

2. One (1) drive end cover seal

3. One (1) set of gaskets

4. One (1) set of V-belts of each size

5. One (1) filter element for each size air intake filter

6. All of the above parts shall be provided as spare parts and shall be packaged for potential long-term dry storage.

2.5.16 Painting

Shop paint assembly frame, blower, silencers, motor, and sliding motor base separately and assemble using grade 5 zinc plated hardware.

Preparation - Remove weld splatter, grind sharp edges and welds, contouring to a rounded shape, and solvent clean in accordance with Steel Structures Painting Council SSPC-SP1.

Primer coat - Apply one coat of Tnemec Series 66-1211, 3 to 4MDFT or approved equivalent.

Interim coat - Apply one coat of Tnemec Series 66 Epoxoline, 3 to 4MDFT or approved equivalent after all components are assembled and system has been performance tested.

Finish coat - Apply one coat of Tnemec Series 73 Endura Shield III Polyurethane, 2 to 3MDFT or approved equivalent.)

Touch-up paint - Provide one pint of finish coat paint for field touch-up.

2.5.17 Factory Testing

The blower package supplier shall supply a certified ASME PTC-9, Method B

Section 44 40 00 Page 12 performance test data based on a factory 1.0 psi shop test. A certified test report, signed by a registered professional engineer, shall be submitted for record

2.6 AIR CONTROL VALVES

2.6.1 Scope of Work

The SBR supplier to furnish four (4) two (2) 8" diameter motor operated air flow control valves to control aeration in the SBR basins.

2.6.2 Related work

Positive Displacement Blowers Fine Bubble Aeration Control Panel

2.6.3 Construction

The valves shall be butterfly valves, wafer body style, EPDM-seat, tight-closing type for installation between two (2) ANSI Class 125/150 standard flanges.

The valves shall be rated at 50 psi (345 kPa) and provide drop tight shutoff at differentials up to 50 psi.

Valve bodies shall have two flange bolt guides to center the body in the pipeline. Valves shall be provided with power actuators.

The seat shall be tongue-and-grove design and act as a body liner to prevent flow from contacting the body casting. The seat shall also provide a positive seal without use of flange gaskets. Seats shall be of EPDM suitable for use with compressed air and shall be field replaceable.

The disc shall be aluminum bronze. The disc-to-shaft connections shall be direct drive double "D" design requiring no disc screws or pins to connect shaft to disc. Outside diameter of disc shall be designed that when opened, it will not interfere with adjacent piping.

Shafts shall be one piece and shall be 416 stainless steel. Shafts shall be finish ground to minimize bearing and shaft seal wear. Shaft seals shall be provided to prevent leakage and to protect bearings from internal or external corrosion.

Valves shall be furnished with self-adjusting stem seal and non-corrosive Acetal bushings for smooth, low torque operation.

Valves actuators shall be rated NEMA 4, with quarter turn, open/close motor operators. Each operator shall be driven by a single phase, 120 Volt motor.

A handwheel shall be attached for manual operation with a positive de-clutch mechanism to engage the handwheel when required. Two limit switches shall be provided with each operator. Torque limit switches shall be provided to de-energize the motor control circuit when the valve encounters an obstruction during travel. Control terminations shall be plug-and-socket assembly. A space heater shall be installed in the limit switch compartment. A dial position indicator shall also be furnished.

Body: Cast Iron (ASTM A 126, Class B) Seat: EPDM

Section 44 40 00 Page 13

Disc: Aluminum Bronze (ASTM B148-954) Stem: 416 Stainless Steel (ASTM A 582/A 582M Type 416) Bearings: Acetal

2.6.4 Acceptable Manufacturers

Valves shall be Bray Series 30 Resilient Seated Butterfly or approved equal.

Actuators shall be AUMA model SG or approved equal.

2.7 FINE BUBBLE AERATION

2.7.1 Scope

Furnish all materials and equipment for the fine bubble aeration system in each of the two (2) SBR basins, two (2) Digesters.

Furnish all equipment as shown on the drawings and as specified herein.

2.7.2 Equipment Components Included

Stainless steel droplegs.

PVC manifolds and air distributors.

PVC diffuser holders and retainer rings.

Stainless steel supports and anchors.

Bolts, nuts and gaskets for aeration system flange connections.

Air distributor purge systems.

Membrane disc diffusers with integral O-ring gaskets and subplates.

2.7.3 Related Work

Positive Displacement Blowers

Air Control Valves

Dissolved Oxygen Control System

2.7.4 System Design and Performance

Tank Design SBR Digester

a. Number of Tanks 2 2

b. Length, ft 105 51.3

c. Width, ft 35 35

d. SWD, ft 18 18

Design aeration system to transfer not less than the following pounds of oxygen per day in each tank in clean water at 14.7 PSI, 20 C and zero dissolved oxygen at the specified submergence, air rate and pressure.

SBR Digester

a. Std. O2 Transfer Rate (SOTR) 330 340 (lbs-02 /hour)

Section 44 40 00 Page 14

b. Air Rate 1,070 970

(SCFM)

c. Oper. Press. at top of 6.9 7.9 Dropleg (psig)

d. Diffuser Submergence, ft. 14.2 17.1

c. Diffuser Layout SBR Digester

Total/Tank 702 506 Total Project 1,404 1,012

Design air distributors with centerline spacing not to exceed 4 feet to maximize oxygen transfer efficiency and mixing efficiency and to minimize solids deposition between air distributors.

2.7.5 Acceptable Manufacturers

Paragraph deleted.

The manufacturer shall have experience in design, manufacturing, supplying and commissioning of fine bubble membrane (ceramic) disc aeration equipment of the type specified for this project. The equipment quoted shall be a proven design and shall be referenced by at least five installations of similar size, having been in successful operation for a period of not less than five years.

2.7.6 Materials, Fabrication and Finishing

Stainless Steel - Pipe, Fittings and Supports

a. Fabricate all welded parts and assemblies from sheets and plates of 304L stainless steel with a 2D finish conforming to ASTM A 240/A 240M, 554, 774, 778.

b. Fabricate non-welded parts and flanges from sheets, plates or bars of 304 stainless steel conforming to ASTM A 240/A 240M or ASTM A 276.

c. Welds & Welding Procedure.

1. Weld in the factory with ER 316L filler wire using MIG, TIG or plasma-arc inert gas welding processes. Provide a cross section equal to or greater than the parent metal.

2. Provide full penetration butt welds to the interior surface with gas shielding of interior and exterior of joint.

3. Continuously weld both sides of face rings and flanges to eliminate potential for crevice corrosion.

d. Corrosion Protection and Finishing: Clean all welded stainless steel surfaces and welds after fabrication by using the following procedure:

Section 44 40 00 Page 15

a. Pre-clean all outside weld areas to remove weld splatter with stainless steel brushes and/or deburring and finish grinding wheels.

b. Finish clean all interior and exterior welds and piping by full immersion pickling and rinse with water to remove all carbon deposits and contaminants to regenerate a uniform corrosion resistant chromium oxide film per ASTM A 380 Section 6.2.11, Table A2.1 Annex A2 and Section 8.3.

c. Corrosion protection techniques not utilizing full immersion methods are unacceptable and will be cause for rejection of the equipment.

Natural Rubber - Furnish all fixed and expansion joint O-ring gaskets of natural rubber/SBR with a Shore A durometer of 45 ± 5.

Polyvinyl Chloride (PVC) - Pipe and Fittings

a. Produce all PVC pipe and fittings from PVC compound with a minimum tensile strength of 7000 psi.

b. Provide lower drop pipe, manifold and air distributors as follows:

Diameter Wall Thickness ASTM 4 inch SDR 33.5 ASTM D 3915, ASTM D 3034

6 inch & larger Schedule 40 ASTM D 1784

ASTM D1785

ASTM D2466

c. Design air distributors and manifolds to withstand 125° F mean wall temperature.

d. Add two parts by weight of titanium dioxide per 100 parts of resin to PVC compounds for manifolds, air distributors, joints and PVC diffuser assembly components to minimize ultraviolet light degradation.

e. Factory solvent weld all PVC joints. Field solvent welding will NOT be permitted.

EPDM - Membrane Diffusers and Gaskets

a. Manufacture circular membrane diffuser discs with integral O-ring of EPDM synthetic rubber compound with precision die formed slits.

Thermoplastic materials (i.e. plasticized PVC or polyurethane) are not acceptable.

b. Add carbon black to the material for resistance to ultraviolet light.

c. Design diffuser as one piece injection molded part with a minimum thickness of 0.080 inches for 9 inch diameter unit.

d. Limit the maximum tensile strength of the diffuser to 10 pi when operating at 2.4 SCFM/sq. ft. of material. Furnish proportionately thicker material for larger diameter disc diffusers to limit the maximum tensile stress and to resist stretching.

Section 44 40 00 Page 16

e. Produce diffusers free of tears, voids, bubbles, creases or other structural defects.

f. Furnish diffuser material to meet the following:

Item Value/Units ASTM Base Polymer EPDM ASTM D 573 UV Resistance Carbon Black Specific Gravity 1.25 or less Durometer - Minimum 58% ± 5% ASTM D 2240 Modulus of Elasticity 500 pi ASTM D412 Ozone Resistance No cracks ASTM D 1171 (72 hrs: 40°C pphm) @ 2X magnification Test A Tensile Strength 1200 pi ASTM D412 Elongation - %

- Retained 70 hrs @ 100°C 75% Max ASTM D 573

- minimum at break 350% ASTM D412

g. Quality Control - Test diffuser using primary sampling criteria outlined in Military Standard 105E.

2.7.7 Fine Bubble Aeration System Components

Droplegs - Provide a stainless steel dropleg from the air main connection to the dropleg connection on the manifold.

a. Provide a Van Stone style flange with a 150 pound bolt pattern for the top connection.

b. Provide a band clamp coupling with gasket for the lower dropleg to manifold connection.

Manifolds - Provide PVC manifolds for connection to the air distribution headers.

a. Fabricate manifolds with 4 inch diameter fixed threaded union or flanged joints for connection to the air distributors.

b. Design manifold, distributor connections and supports to resist thrust generated by expansion/contraction of the air distributors over a temperature range of 125 F.

c. Support manifold with a minimum of two supports.

d. Connect manifolds with fixed threaded union or flanged joints to prevent rotation or blow apart.

Air Distributors and Diffuser Holders - Provide 4 inch diameter air distributors perpendicular to the air manifold

a. Fabricate distributors with single diffuser holders solvent welded to the crown of the air distributor for complete air seal and strength.

b. Design distributors and holders to resist a dead load of 200 lbs.

applied vertically to the outer edge of the diffuser holder.

c. Provide 4-inch diameter threaded removable end caps complete with gasket, threaded coupling and end plate for clean out at the end

Section 44 40 00 Page 17 of each distributor.

Air Distributor and Manifold Connection Joints

a. Join air distributor sections with positive locking fixed threaded union or flange type joints for all submerged header joints to prevent blow apart and rotation.

b. Bell and spigot, slip on or expansion type joints are not acceptable for submerged joints.

c. Design threaded union joints with spigot section connected to one end of the distribution header, a threaded socket section connected to the mating distribution header, an "O" ring gasket and a threaded screw on retainer ring. Solvent welding shall be done in the factory.

d. Design flanged joints with a 125 lb drilling angle, face ring, follower flange and stainless steel hardware.

Supports- Provide each section of manifold and air distributor with a minimum of two (2) supports.

a. Limit maximum support spacing to 8 feet.

b. Design all supports to allow for thermal expansion and contraction forces over a temperature range of 125 F and to minimize stress build up in the piping system.

c. Design supports to be adjustable without removing the air distributor from the support.

d. Design supports to allow for complete removal from the tank to facilitate installation of additional headers and in-tank maintenance.

e. Manifold Support - 6 inch diameter and larger.

1. Design supports to include hold down guide straps, support structure and anchor bolts.

2. Design guide straps with a 2 inch minimum width to eliminate point load on manifold and minimize binding.

3. Design support for 2 inches plus or minus vertical adjustment for leveling of manifold.

4. Attach supports to tank floor with two stainless steel anchor bolts.

f. Air Distributor and Manifold Supports - 4 inch diameter.

1. Provide guide and fixed type supports to allow expansion/contraction.

2. Design supports with hold down straps, support structure and anchor bolt.

3. Design support for 1 1/2 inch (plus or minus) vertical

Section 44 40 00 Page 18 adjustment for leveling air distributor to plus or minus 1/4 inch.

4. Guide support

a) Guide straps to have 1 1/2 inch wide top and bottom contoured bearing surface with chamfered edges to minimize binding and resistance to movement of air distributor under full buoyant uplift load.

b) Design strap with 1/8 inch clearance around distributor so strap is self-limiting and cannot be over tightened.

5. Fixed supports

a) Fixed straps to have 1 1/2 inch wide top and bottom contoured bearing surface with punched burrs to positively grip the air distributor when tightened.

b) Design strap to be self limiting to prevent stressing the distributor if the clamp is over tightened.

6. Attach supports to tank floor with one stainless steel anchor bolt.

Diffuser Assemblies - Furnish diffuser assemblies including diffuser, diffuser gasket, holder, retaining ring and air flow control orifice.

a. Membrane Diffuser

1. Incorporate an integral check valve into the membrane diffuser.

2. Design and test diffusers for a dynamic wet pressure (DWP) of 12 inches 20% water column @ 1.0 SCFM/diffuser and 2 inches submergence.

3. Visual Uniformity - Observe diffusers for uniform air distribution across the active surface of the diffuser at 1.0 SCFM/diffuser and 2 inches submergence. Active surface is defined as the perforated horizontal projected area of the diffuser.

4. Quality Control - Test diffuser using primary sampling criteria outlined in Military Standard 105E.

5. Diffuser Support Plate - Provide a PVC support plate to form an air plenum under the diffuser and support for the membrane when the air is off.

b. Diffuser Holders and Retainer Rings.

1. Design holder with air flow control orifice and plenum chamber below the diffuser. Holder to provide peripheral support for the diffuser.

2. Design retainer ring to seal the diffuser and O-ring in the holder to prevent air leakage around gasket.

3. Design retainer rings threads with minimum cross section of 1/8-inch and allow for one complete turn to engage threads.

Section 44 40 00 Page 19

Anchor Bolts

a. Design anchor bolts for embedment in 4000 psi concrete with a pullout safety factor of 4.

b. Provide a mechanical stainless steel expansion type anchor bolt system.

Liquid Purge System - Provide a liquid purge system to drain the entire submerged aeration piping system for each aeration grid including airlift purge eductor line and control valve. The purge system shall use a solenoid valve for automatic operation coordinated with SBR operation.

2.8 SUBMERSIBLE MIXERS

2.8.1 Scope of Work

The SBR system supplier shall furnish four (4) submersible mixers, two (2) in each SBR basin.

2.8.2 Related Work

Control Panel

2.8.3 Equipment

Each mixer shall be equipped with a 8.3 HP, submersible electric motor connected for operation on 460/3/60 power, with 30 feet of submersible cable (SUBCAB) suitable for submerged mixer applications. All cables shall be oil resistant chloroprene rubber jacketed. Each mixer shall be fitted with an appropriate length of stainless steel cable of adequate strength to permit the raising and lowering the mixer.

2.8.4 Mixer Construction

Each mixer shall be of the integral design, close coupled, submersible type. All mixer components, including the motor, shall be capable of continuous underwater operation. Major mixer components shall be of 304L stainless steel. The oil housing cover plate shall be of corrosion resistant composite. All exposed nuts and bolts shall be of stainless steel. In order to insure that the low velocity area around the motor remains impervious to low PH solids and or liquid attack, the motor housing exterior shall be made of 316 stainless steel.

2.8.5 Motor

The multi-pole motor shall be directly connected to the propeller (gearbox designs are not acceptable) to produce a propeller speed of 580 RPM. The mixer motor shall be squirrel cage, induction, shell type design, housed in an air filled watertight chamber.