DIVISION 13 SPECIAL CONSTRUCTION - D.N. Higginsdnhiggins.com/docs/Division 13.pdfB. Perform a field...

DIVISION 13

SPECIAL CONSTRUCTION

IWSD 01/2011 13211-1 Bolted Steel Storage Tank

AECOM REBID

SECTION 13211

BOLTED STEEL STORAGE TANK

PART 1 - GENERAL

1.01 Description

This section describes fabrication and erection of ground-supported flat-bottom or sloped bolted

and factory-coated steel tanks (for use as clarifier and sludge holding tanks) in accordance with

AWWA D103 and the following restrictions:

A. Provide lightning protection.

B. Required ringwall foundation shall be designed and constructed by the tank

fabricator/builder in accordance with the manufacturer’s design requirements and

installation requirements.

C. Provide concrete ringwall foundation.

1.02 Related Work Specified Elsewhere

A. Earthwork: 02200.

B. Excavating, Backfilling, And Compacting for Pipe and Structures: 02221.

C. Cast-in-Place Concrete: 03300.

D. Lightning Protection: 16110.

1.03 Design Procedure

Comply with AWWA D103 (latest revision) with current addenda including Section 12.

1.04 Design Information

A. The project tank dimensions are as follows:

1. Clarifier:

a) Process No.: 5

b) Description: Secondary Clarifier

c) Inside Tank Nominal Diameter: 69.94 feet

d) Tank Bottom Elevation at Ringwall (feet): 27.0

e) Grade Elevation (feet): 28.0-29.0+


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f) V-notch Weir Invert elevation (feet): 40.00

g) Maximum Liquid Elevation (feet): 40.2

h) Overall Tank Height (feet): 14.68

2. Sludge Holding Tank:

a) Process No.: 6

b) Description: Sludge Holding Tank

c) Inside Tank Nominal Diameter: 50.35 feet

d) Tank Bottom Elevation at Ringwall Foundation (feet): 30.0

e) Grade Elevation (feet): 31.0-32.0+

f) V-notch Weir Invert elevation (feet): n/a

g) Maximum Liquid Elevation (feet): 40.5

h) Overall Tank Height (feet): 12.04

B. Design the tank and anchorage system per the FBC requirements supplemented by ASCE 7

for wind loading requirements:

1. Basic Wind Speed, mph: 100 – Gusts to 120 MPH.

2. Importance Factor: 1.15.

3. Exposure: C.

C. Lowest One-Day Mean Ambient Temperature: +40°.

1.05 Submittals

A. The drawing and accessory list of AWWA D103 is not required with the bid. Submit with

detail drawings.

B. Provide a summary of the design calculations for the tanks and foundation design in detail

to indicate the procedures used, signed by a structural engineer licensed to practice in the

State of Florida. Provide foundation designs.

C. Detail Drawings: Submit in accordance with General Conditions, Section 01300, and the

following:

1. Dimensional drawing.

2. Verify there is to be no welding on the tank or to the tank.

3. Joint bolting.


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4. Accessory list with fabrication details.

5. Erection drawings.

6. Catalog data and descriptions of standard manufactured items.

7. Anchor bolt size and layout.

8. Coating system.

9. Backfill requirements where applicable. This includes additional web truss to

provide additional support, truss installation procedures and backfill installation

requirements.

D. Mill test reports of steel materials with a certification of which ASTM or other AWWA

D103-required specification each material complies with.

E. Provide for shop inspection by Owner or his representative.

F. Report per Sections 9.1 and 9.2 AWWA D103 at the conclusion of the work certifying the

inspection.

G. UL electronic master label for lightning protection system.

H. Certificate of compliance with AWWA D103 including Section 12.

I. Demonstrate experience by providing a list of at least five (5) tanks of similar size in the

USA (preferably Florida) that are being used in wastewater service. Provide the size and

character of each project operating satisfactorily for a minimum of five (5) years and

including the name and telephone number of the Owner and Engineer.

1.06 Inspection and Testing

A. Obtain and provide the services of an independent qualified testing/inspection laboratory to

inspect shop fabrication field erection work and interior holiday testing. At the completion

of the work, the independent laboratory shall submit a written report to the Owner stating

that the fabrication and erection of the tank is in accordance with the manufacturer’s

instructions, materials and coatings are in accordance with the specifications, and that

required testing has been performed and deficiencies and leaks have been repaired.

B. Perform a field holiday test on each shell panel. Each panel shall be 100% holiday free in

the areas more than 2 inches from a panel edge.

C. Verify no damage occurred during shipping.

PART 2 - MATERIALS

2.01 Lining and Coating

A. Provide fused glass lining and coating per Section 10 of AWWA D103. Minimum glass

thickness of interior coating shall be 10 mils. Interior glass color shall be off-white or ivory


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– titanium enriched 18-22%. Exterior color shall be desert tan, subject to review by the

Owner.

B. Line the interior of outlets and nozzles per Section 09900, System 7.

C. Coat the exterior of outlets and nozzles inside the tank per Section 09900, System 7.

D. Characteristics and physical properties of the glass lining and coating shall be as follows:

1. Service Range: 140°F at 3 to 10 pH (subject to verification, depending on specific

products stored).

2. Adherence: Over 5,000 psi to base steel.

3. Impact Resistance: 24 inch-pounds.

4. Abrasion Resistance: Taber-8 mg loss (CS-17, 1,000 grams, 1,000 cycles).

5. Elasticity (Young’s Modulus): 12 x 106.

6. Permeability: Impermeable to gases and liquids within normal operating temperature

ranges.

7. Thermal Conductivity: 20.4 Btu/hour/ft2/°F/inch.

8. Cleanability: Smooth, inert, glossy, and anti-stick.

9. Hardness: 6.0 to 7.0 Mohs.

E. The full panel edges shall be mechanically beveled. Thermally spray the edges of the shell

sheets with a stainless steel alloy. Then apply the glass coating.

2.02 Bolts, Gaskets, and Sealants for Seams, Joints, and Tank Panels

Provide bolts, gaskets, and sealants per Section 2 of AWWA D103.

2.03 Shell Joints and Sealants

A. Provide a shell lap joint design that uses a sealant and bolted connection. The lap joint

sealant shall be a one-component, moisture-cured, polyurethane compound. The sealant

shall be suitable for contact with potable water and shall be certified to meet ANSI/NSF 61

for indirect additives. Use the sealant to seal lap joints, bolt connections, and edge fillets

for sheet notches and starter sheets. Sealant curing rate at 73°F and 50% RH:

1. Tack-Free Time: Six to eight hours.

2. Final Cure Time: 10 to 12 days.

B. The sealant shall be ESPC Sealer No. 98.


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2.04 Lap Joint Fasteners and Bolt Head Encapsulation for Tank Shell

A. Install bolts on the vertical tank wall such that the head portion is located inside the tank

and the washer and nut are on the exterior. Select lap joint bolts such that threaded portions

will not be exposed to the “shear plane” between tank sheets. Size bolt lengths to achieve a

neat and uniform appearance. Excessive threads extending beyond the nut after torquing

will not be permitted.

B. Provide high-impact polypropylene copolymer encapsulation of entire bolt head up to the

splines on the shank. Polyethylene co-polymer “bolt caps” and sealant shall be used to

protect the exposed bolt threads, nuts and washers on the exterior of the tanks.

2.05 Accessories

A. Clarifier launders weirs and scum baffles:

1. Design, furnish and install the effluent launders, V-Notch weirs, scum baffles and

related outlet piping in accordance with the project drawings.

2. Launderers shall be designed against uplift when the tank is full and the launderers

are empty.

3. Similarly, launderers shall be designed for being full as the tank drains.

B. Sludge Holding Tanks

1. Furnish and install telescoping valves and related outlet piping in accordance with

the project drawings.

2. Design 3 point restraint system for the floating mixer as shown in the drawings.

2.06 Pipe and Nozzle Connections

A. Inlet and outlet nozzles (and water circulating ells) sized for clear inside diameters and

containing auxiliary small-diameter connections and valves.

B. Locate piping connections per AWWA D103, Section 12.5. Penetrations of shell shall be

not less than 12 inches clear above bottom.

C. Outlets shall be 2 inches minimum and shall be of the flanged-nozzle type. Nozzle wall

thicknesses shall be as follows per ASME B36.10:

Nozzle Size

(inches) Wall Thickness

4 and Smaller Schedule 80

Larger than 4 0.375 inch

D. Where connecting to piping smaller than 2 inches, provide a tapped blind flange.


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E. Steel pipe 18 inches and smaller in diameter shall be ASTM A53 (Type E or S), Grade B;

API 5L, Grade B; or ASTM A135, Grade B.

F. Steel pipe larger than 18 inches in diameter shall be ASTM A135, Grade B; API 5L, Grade

B; ASTM A134; or AWWA C200 or shall comply with the requirements of ASTM A53,

Grade B. Pipe conforming to ASTM A134 shall be made of steel conforming to ASTM

A283, Grade C or D or ASTM A285, Grade C.

G. Pipe 6 inches and larger shall lined with ceramic epoxy per Section 09978.

2.07 Flanges

Flanges, Drilling, and Bolt Size for Nominal 4 to 36 Inches in Diameter: AWWA C207, Class D

unless otherwise noted on the drawings. For 3 inches and smaller: ASME B16.5. Flanges shall be

flat faced.

2.08 Bolts and Nuts for Flanged Nozzles and Manways

Bolts and nuts shall match components of tank construction. Provide washer for each nut and bolt

head. Washers shall be of the same material as the nuts.

2.09 Stairs

A. Conform to project state, FBC and OSHA requirements.

B. Provide exterior stairs/handrails with a landing as shown on the drawings.

C. At access points provide two (2) 316 SST safety chains per opening. Chains shall be proof

coil style, 3/16 inch in diameter with at least 12 links per foot and with snaphooks at each

end. Snaphooks shall be Type 316 stainless steel.

2.10 Preformed Expansion Joint Filler

Preformed expansion joint filler shall comply with ASTM D1751, nonextruding, nonextending,

resilient bituminous type. Do not use strips utilizing cork. Use cane or other cellular fibers,

uniformly saturated with asphalts.

2.11 Bituminous Mastic

Bituminous sealant: Henry's 204 as manufactured by Henry Company, APCO 100, Marvin, or

equivalent.

2.12 Lightning Protection System

A. Refer to Section 16110. Provide air terminals, ground connections, and grounding circuits.

Comply with UL 96A, and upon completion of the work, provide the Owner with a Master

Label issued by UL.

B. Use a buried No. 4/0 bare copper wire counterpoise installed along the tank foundation

periphery. Provide a 3/8-inch-diameter, 20-foot-long, copper-clad grounding rod at each

down conductor location. Protect the connection of the down conductor, ground rod, and

the counterpoise in a concrete box with a removable cast-iron cover plate marked


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"GROUNDING ELECTRODE." Provide crushed rock in the bottom of the box for

drainage to a depth of 18 inches.

C. Use exothermic welds for wire splicing and bonding of the tank.

2.13 Concrete Ringwall Foundation

Per Section 03300.

PART 3 - EXECUTION

3.01 Concrete Ringwall Foundation

Place concrete so top surface is smooth and lies within 1/8 inch of a straight line in any 16-foot

segment and all points are within 1/4 inch of design elevation. Install anchor bolts per design

requirements.

3.02 Temporary Closure of Tank Openings

Provide and emplace with three or more bolts temporary covers of metal, 10 gauge minimum, or

plywood, concrete form quality, cut to fit the tank openings that are not fitted with valves,

hatches, or manhole covers at the completion of erection. The covers are intended to exclude dust,

animals, and intruders before and after painting and after disinfection.

3.03 Tank Backfill

A. Follow manufacturer’s recommendations.

B. Protect tank wall with ½:” fiber mat prior to backfill.

C. Place a minimum of 2 foot deep by 2 foot wide band of material complying with Section

02276 along the base of the wall where the backfill is to be placed.

D. Place the fill using hand labor; do not use heavy wheeled earth moving equipment

E. Place the fill evenly around the tank, do not create an area of concentrated loading

F. Slope the fill away from the tank assuring that no surface water can pond against the tank

wall.

G. Keep all portions of vehicles with individual wheel loads over 500 pounds a distance of at

least 2 times the fill depth away from the wall.

3.04 Field Touch-Up of Interior and Exterior Coatings

Repair damaged coatings. Apply new coating to same thickness as the factory-applied coating.

Comply with AWWA D103, paragraph 10.2.


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3.05 Leak Test of Steel Tank

A. Initial filling, testing, and draining shall be coordinated with the Owner. Following the

completion of final cleanup and disinfection, fill the tank for final inspection and leak

testing with Contractor-furnished water through connected or temporary piping as needed.

Coordinate water source with the Owner. Disposal of test water or tank drain water will be

in accordance with the Owner’s requirements and local discharge regulations. If no leaks or

defects are detected, the test water may be placed into the connected system. Subsequent

draining, repairing, and testing shall be accomplished at no additional cost.

B. Repair any leaks disclosed as provided in AWWA D103, Section 9.

3.06 Certification

Provide a written certification from the tank manufacturer that the tank has been installed

according to the plans, specifications and manufacturer’s specifications, and operating normally.

Make necessary corrections and adjustments at no additional cost.

3.07 First Anniversary Inspection of Tank

At expiration of 11 months after acceptance of the tank by the Owner, reinspect interior and

exterior coatings and joints for proper performance. Repair failed coatings and repair joints or

leaks. Provide lighting and ventilation for the tank inspection. The Owner will drain the tank.

Perform the remedial work and provide inspection report.

END OF SECTION

IWSD 01/2011 13271-1 Pre-Engineered Effluent Monitoring System

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SECTION 13271

PRE-ENGINEERED EFFLUENT MONITORING SYSTEM PART 1 - GENERAL 1.01 Description This section describes the materials and installation of a pre-engineered wastewater effluent

monitoring system including instruments, piping, electrical work, fiberglass reinforced plastic all weather enclosure and other work as described herein.

1.02 Submittals

A. Submit shop drawings in accordance with the General Conditions, Section 01300, and the following:

B. Building drawings submitted by the manufacturer shall be stamped by a civil or structural

engineer registered in the State of Florida.

PART 2 - MATERIALS 2.01 Enclosure Construction

A. Enclosure shall have a floor dimension of 6'x6'. The height of the enclosure at the door

opening shall be a minimum of 6'-3". Provide a sloped roof with cadmium plated lifting eyes.

B. The enclosure material shall be fiberglass with a smooth chemical resistant gel-coat exterior

finish, with color molded-in, self-extinguishing construction and be constructed of laminate with the following properties:

Tensile Strength: 14,000 psi Flexural Strength: 25,000 psi Flexural Modulus: 1.0 x 10

6 psi

C. The enclosure material shall have a 1-inch closed cell rigid polyurethane foam insulation

completely encapsulated in roof and walls. Thermal conductivity of the shelter shall be a maximum of 0.15 BTU/hr./ft./

oF.

D Provide a single insulated fiberglass door with a minimum 36-inch opening of fiberglass

construction with stainless steel hinges, plated stop chains, a stainless steel single point locking latch and a neoprene sponge door gasket. Provide a safety glass window mounted in neoprene molding in the door.

E. Design enclosure, anchors and anchor bolts for 120 mph wind in accordance with the

Florida Building Code. Drawings for the building shall be signed and sealed by a structural engineer registered to practice in the state of Florida.

F. Design enclosure to support equipment, piping and conduit.


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G. Provide one (1) screened aluminum vent and gasketed control damper interlocked with the exhaust fan. Provide opening for an exhaust fan and damper with a weather proof seal. Exhaust will be controlled with an on/off switch located outside. Exhaust will provide a one minute air change.

H. Provide wall penetrations for piping and for conduit.

2.02 Effluent Monitoring Equipment A. One disinfected water sample stream will be pumped to the enclosure. Turbidity, total

chlorine residual and pH will be measured in the disinfected water sample stream. Design the system to continuously measure and record turbidity, chlorine residual and pH.

B. Furnish and install the following items of monitoring equipment per Division 16 with local

indication in the enclosure in accordance with the manufacturer's recommendations:

1. Turbidimeter 2. Chlorine Residual Analyzer 3. pH probe for in-line mounting on the sample pipe.

C. Provide the capability to transmit the signals from the analyzers to a remote location for

recording. D. Alarm signals will be generated when low total chlorine residual is detected and when high

turbidity is detected. Provide an exterior mounted alarm horn and flasher.

2.03 Piping and Valves A. Design sample piping within the enclosure to allow maintenance of any single analyzer

(turbidity, chlorine residual or pH) without taking the other analyzers out of service. Design piping and select piping components in accordance with the analyzer manufacturer's recommendations and the drawings.

B. Pipe materials for sample and drainpipes shall be Schedule 80 PVC, Type 1, Grade 1 (Class

12454-B) conforming to ASTM D1784 and D1785. C. Socket weld pipe and fitting joints. Provide sufficient unions in the piping arrangement to

allow convenient disassembly of piping. D. Isolation valves shall be double union PVC ball valves (Type 310 per Section 15100). E. Provide a pressure relief valve on the sample inlet with discharge to the drain to protect the

system from over pressurization. F. Provide pressure-regulating valves on the sample inlets to the analyzers. G. Provide sample valve and cup sink for each sample stream. H. Limit head loss from the inlet connection on the outside of the enclosure through the

analyzers to the drain, to no more than 8 feet.

2.04 Electrical


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A. Design and install within the enclosure an electrical system to serve the items of equipment

housed within the enclosure. Furnish sufficient 120V GFCI receptacles to power equipment and to have two spare duplex outlets. The electrical system shall consist of the following: external light switch, 120V receptacles, 120V A.C. unit, conduit and wire, circuit breaker, surge suppressor, interior light fixture, and other items required for a complete design and installation. Electrical system shall conform to these specifications.

B. Underwriters' Laboratories, Inc. (UL): Materials, appliances, equipment, and devices shall conform to the applicable UL standards. The label of, or listing by, UL is required for all electrical equipment and components.

C. Installation shall comply with the latest edition of National Electrical Code (NEC) and

applicable local codes. D. Furnish and install conduit conforming to the following:

1. Rigid Nonmetallic Conduit: Polyvinyl chloride (PVC) Schedule 40, 90°C rise rating. Conform to NEMA TC-2 and UL-651.

2. Liquid-Tight Flexible Conduit: Identical to flexible steel conduit but with overall

PVC plastic jacket. Conform to UL-360. E. Receptacles shall be molded composition, ivory, and specification grade. Duplex receptacles

for 120-volt, single-phase, 3-wire service to be rated 20 amperes, 125 volts, back or side wired, NEMA Type 5-20R, ground fault interrupter type complying with UL-943, Class A.

F. Switches shall be NEMA WD 1, molded composition, ivory, specification grade, single

pole. Use switches rated 20 amperes, 120/277-volt a-c for 120 volt lighting. G. Provide gasketed weatherproof gray polycarbonate lift-cover type and switches. H. Furnish lighting fixtures complete with lamps, sockets, wiring, vaportight housing, and

mounting hardware, as required. Lamps shall be incandescent, rough service type, 125 volts, 100 watt type A-19.

I. Molded-case circuit breakers. Provide quick-make and quick-break toggle mechanism,

inverse-time trip characteristics, and trip-free operation on overload or short circuit. Automatic tripping shall be indicated by a handle position between the manual OFF and ON position. Provide trip rating as required for the load served. Enclose circuit breakers within a NEMA 4X fiberglass (or stainless steel) enclosure.

J. Provide surge suppressors on the 120 volt AC conductors entering the enclosure.

Suppressors shall be listed in accordance with UL-1449, Standard for Safety, Transient Voltage Surge Suppressors. Suppressors shall be solid-state type and shall operate bidirectionally.

K. Furnish electrical components in conformance with Division 16.

PART 3 - EXECUTION 3.01 Manufacturer's Services


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Provide a Manufacturer’s representative for a minimum of two days of service to start-up the equipment and train the Owner's personnel.

3.02 Installation Install the monitoring system in accordance with the manufacturer’s recommendations. Make pipe

and electrical connections. Anchor enclosure to the concrete deck using type 316 wedge anchor bolts per Section 05050 and

the manufacturer’s recommendations. 3.03 Testing Demonstrate to the Owner’s representative that the instruments are measuring parameters within

the manufacturer’s accuracy range. 3.04 Certification Provide a written certification from the equipment manufacturer that the System has been installed

according to the Contract Documents and manufacturer’s recommendations, and that the equipment is operating normally. Make necessary corrections and adjustments including but not limited to parts, labor or freight at no additional cost.

END OF SECTION

IWSD 01/2011 13422-1 Magnetic Flowmeters

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SECTION 13422

MAGNETIC FLOWMETERS

PART 1 - GENERAL

1.01 Description

This section describes requirements for magnetic flowmeters. Provide the number and type of

flowmeters as described under Part 3, 3.01, Service Conditions.

1.02 Related Work Specified Elsewhere

A. Painting and Coating: 09900.

B. Pressure Testing of Piping: 15144.

C. Equipment, Piping, and Valve Identification: 15075.

1.03 Submittals

A. Submit shop drawings in accordance with the General Conditions, Section 01300 and the

following:

B. Submit manufacturer's catalog data and detail drawings showing dimensions, pressure

rating, coatings, and meter parts and describe by material of construction specifications

(such as AISI, ASTM, SAE, or CDA) and grade or type. Identify each meter by tag

number to which the catalog data and detail sheets pertain.

C. Furnish manufacturer’s application performance guarantee with submittals.

D. Show meter laying lengths.

PART 2 - MATERIALS

2.01 Manufacturers

A. The meter flow tube and transmitter shall be by the same manufacturer.

B. The magnetic flowmeters and transmitters shall be manufactured by one of the following

manufacturers or equivalent:

1. ABB Instrumentation, Rochester, New York:

Magnetic Flowmeter with Transmitter: Model MagMaster or MFF series

with MFE4 transmitter.

2. Endress+Hauser, Greenwood, Indiana:


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a) Magnetic Flowmeter: Model Promag W.

b) Transmitter: Model Promag 50 or 53.

3. Dynasonics

Model DFX with Transmitter

C. The manufacturer shall have a minimum of five years' experience in the manufacture of

bipolar d-c magnetic flowmeters.

2.02 Meter Design

A. The magnetic flowmeter shall be an obstructionless pipeline-mounted instrument to

magnetically measure the flow of the process media. The output signal shall not be affected

by changes in fluid viscosity or density and shall have zero point stability and auto zeroing

functions. Provide the magnetic flowmeter with the following features:

1. Drip- and splash-proof sensor, capable of withstanding temporary submersion of up

to 30 feet of water for 48 hours.

2. Integral terminal box with watertight cable seals.

3. Interconnecting cables.

4. Liner protectors.

B. Provide stainless steel grounding rings and grounding straps per manufacturer’s

requirements.

2.03 Materials of Construction--Flangeless Meters

A. The flow tube shall be flangeless wafer construction with cast aluminum enclosure.

Provide bolting kit.

B. Liner and electrodes shall be as indicated in the subsection on "Service Conditions."

2.04 Materials of Construction--Flanged Meters

A. The flow tube shall be as indicated in the subsection on "Service Conditions" with carbon

steel flanges.

B. Liner and electrodes shall be as indicated in the subsection on "Service Conditions."

2.05 Indicator/Totalizer

The indicator/totalizer shall accept the process flow signal from the magnetic flowmeter and

convert its electrical output signals directly proportional to the instantaneous metered flow rate.

The housing shall be suitable for field mounting.


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2.06 Transmitter

A. The transmitter shall be microprocessor based with flow rate indicator in engineering units,

forward, reversed, and net flow totalizer, all in user-selectable engineering units. The

display shall also be capable of indicating alarm status and velocity of fluid. The

transmitter shall be mounted as indicated in the instrument list.

B. The preamplifier input impedance shall be a minimum of 10E+11 ohms.

C. Power Requirements: 117-volt ac, ±10%, 60 hertz.

D. Totalized flow and programmed configuration shall be maintained in memory for up to 10

years.

2.07 Interconnecting Cable

The interconnecting cable between the sensor and the transmitter shall be furnished by the

magnetic flowmeter manufacturer.

2.08 Performance

The overall system's performance shall be as follows:

A. Accuracy: 0.5% of flow rate with minimum fluid velocity of 1 fps.

B. Repeatability: ±0.1% of flow rate.

C. The accuracy of each meter shall be verified by calibration in a flow laboratory traceable to

the U.S. National Institute of Standards and Technology.

D/ Adjustable full-scale range.

E. Outputs: Bidirectional, isolated 4- to 20-mA d-c and either 24-volt d-c scaled pulse, or 0-

to 10-KHz frequency.

F. Minimum Conductivity: 5 micromho/centimeter.

G. Power Consumption: 20 watts maximum.

H. Temperature Limits, Ambient: -20°F to +140°F.

I. Temperature Limits, Process: Elastomers +160°F, Teflons +300°F, ceramic 350°F.

J. Field Selectable Low Flow Cutoff: 0% to 10%.

K. The flowmeter shall have a positive zero return (PZR) input controlled by an external dry

contact.

L. Environmental Rating: NEMA 4X, Class I, Division 2 for both sensor and electronics

whether remote or sensor mounted.

M. The meter shall have empty pipe detection.


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N. A common alarm discrete output (a dry contact or a transistor switch) shall be provided for

remote indication of fault conditions.

2.09 Meter Identification

Provide identification tag per Section 15075.

PART 3 - EXECUTION

3.01 Service Conditions

MAGNETIC FLOWMETERS AND INDICATOR/TOTALIZERS

GENERAL

1. P&ID No. 01FE/FIT-1 01FE/FIT -2 07FE/FIT -1 07FE/FIT -2

2. Service Raw Sewage Raw Sewage RAS WAS

MAGNETIC FLOWMETER

3. Tag No. 01FE - 1 01FE -2 07FE -1 07FE -2

4. Meter Type Strap-On Strap-On In-Line In-Line

Size Flg. 10 12 8 4

Rating (psi) N/A N/A 150 150

5. Metering Tube Material N/A N/A Carbon Steel Carbon Steel

6. Liner Material N/A N/A Poly-urethane Poly-urethane

7. Electrode Material N/A N/A 316 SST 316 SST

8. Elec. Class. NEMA 4X NEMA 4X NEMA 4X NEMA 4X

INDICATOR/TOTALIZER TRANSMITTER

9. Tag No. 01FIT-1 01FIT-2 07FIT-1 07FIT-2

10. Flow Rate Ind. Scale 0-7,000 gpm 0-7,000 gpm 0-1,800 gpm 0-700 gpm

11. Flow Totalizer Multiplier 1000 gal 1000 gal 100 gal 100 gal

12. Aux. Output Signal 4-20 ma 4-20 ma 4-20 ma 4-20 ma

13. Aux. Output Signal To To be

determined

To be

determined

To be

determined

To be determined

14. Elec. Class. NEMA 4X NEMA 4X NEMA 4X NEMA 4X

15. Mounting Strap-On Strap-On Pipe Mount Pipe Mount


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SERVICE CONDITIONS

16. Process Media Raw Sewage –

New Hdwks

Raw Sewage –

Ext. Hdwks.

Return

Activated

Sludge

Waste Activated

Sludge

17. Spec. Gravity 1.00-1.02 1.00-1.02 1.00-1.05 1.00-1.05

18. Conductivity (Mhos)

(min/max) 100/800 100/800 100/800 100/800

19. Percent Solids (min/max) 0.1% 0.1% 0.35% 0.35%

20. Flow (gpm) (min/max) 350-7,000 gpm 350-7,000 gpm 900-1,800 gpm 0-625 gpm

21. Velocity (fps) (min/max) 1-20 1-20 5.7-11.5 0-16

22. Press. (psig) (min/max) 10/50 10/50 5/50 5/50

23. Temp. (°F) (min/max) 40/100 40/100 40/100 40/100

3.02 Replacement Spool

Furnish a flanged standard weight steel spool with gaskets for each magnetic flowmeter. The

spool shall be the same length as the meter.

3.03 Painting and Coating

Coat exposed carbon steel components of meter tube and sensor the same as the adjacent piping.

If the adjacent piping is not coated, then coat per Section 09900, System No. 10. Apply the

specified prime coat at the place of manufacture. Apply intermediate and finish coats in field.

Finish coat shall match the color of the adjacent piping.

END OF SECTION

IWSD 01/2011 13448-1 Automatic Liquid Composite Samplers

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SECTION 13448

AUTOMATIC LIQUID COMPOSITE SAMPLERS

PART 1 - GENERAL

1.01 Description

This section includes labor, materials and equipment for installation of refrigerated automatic

liquid composite samplers.

1.02 Submittals

A. Submit shop drawings in accordance with the General Conditions, Section 01300 and the

following:

B. Submit manufacturer's catalog data and descriptive literature. Submit dimensional

drawings. Show interface wiring for receiving the 4- to 20-mA flow proportional signal.

1.03 Manufacturer's Services

Provide equipment manufacturer's services at the jobsite for the minimum labor days listed

below, travel time excluded:

A. One-half labor day to check the installation and advise during start-up, testing, and

adjustments of the equipment.

B. One-half labor day to instruct the Owner's personnel in the operation and maintenance of

the equipment.

PART 2 - MATERIALS

2.01 Manufacturers

Samplers shall be Teledyne ISCO Model 6712 FR or equivalent.

2.02 Automatic Samplers

A. Sampler shall be of the enclosed, refrigerated type containing a pump, controller,

polyethylene container, and associated tubing and wiring. A corrosion-resistant fiberglass

body and temperature control system shall allow the refrigerated sampler to be used

outdoors without an enclosure in ambient temperatures from -20°F to 120°F. Provide

calibrated control to select a storage temperature of 32°F to 46°F. Provide forced air

condensing coil and front ventilation.

B. The refrigerated sampler shall be equally suited for sequential and composite sampling

applications. In sequential applications, the sampler shall be capable of collecting discrete

samples in 24-, 8-, or 2-sample bottles. The 8- or 24-bottle versions shall hold the bottles in


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a nylon-coated slide-in rack. For composite applications, the sampler shall be capable of

being converted to use a single 2-1/2-gallon glass or polyethylene container. Glass sample

bottles shall have Teflon-lined screw caps. Plastic sample bottles shall have polyethylene-

lined screw caps.

C. The refrigerator shall include electronic sensing devices for measuring ambient air

temperature, evaporator plate temperature, and interior air temperature. Built-in

temperature control circuitry shall utilize these sensors to control the operation of the

compressor and built-in heaters. The built-in heaters shall prevent the sample from freezing

if the ambient air temperature drops below freezing. The unit shall be self-defrosting and

shall use a forced-air condensing coil with filtered frontal ventilation. Provide a

compressor with a minimum rating of 1/6 hp. The refrigerator shall have a five-minute

(maximum) recovery time to return to 39°F after the door has been opened for one minute

with the unit operating at 39°F (4°C).

D. Construct the exterior and base of the refrigerator of FRP with a UV-resistant gel coat. The

interior of the refrigerator shall be food grade ABS plastic. Provide copper refrigeration

lines protected with polyester tubing and phenolic resin. Coat the condenser coil with UV-

resistant polyurethane. The refrigerator evaporator plate shall be aluminum and coated with

a food grade epoxy. The refrigerator shall include 1 1/2 inches of rigid foamed-in-place

insulation on the sides. The top insulation shall consist of 3 inches of rigid insulation.

Insulation shall not sustain bacterial growth or retain odors. The refrigerator shall have a

hinged reinforced fiberglass controller cover, which is capable of being locked.

E. Locate the temperature control knob under the controller cover. The refrigerator's door

shall also have hasps capable of accepting a padlock. Provide a magnetic gasket to seal the

refrigerator door. The refrigerator power supply and solid-state thermostat shall be

contained in a sealed, NEMA 4, aluminum or stainless steel enclosure inside the

refrigerator base. All other exposed metal components shall be anodized aluminum,

stainless steel, or galvanized steel.

F. For multiple bottle sampling, the sample distribution system shall use a mechanism to lock

the distributor arm above each bottle position. The distributor arm shall be made of

polypropylene. The distribution drive assembly shall be included in a sealed NEMA 4X

controller to prevent exposure of the electromechanical components.

G. Samples shall be collected using a peristaltic pump. The body of the peristaltic pump shall

be made of plastic. The pump shall be capable of producing 26 feet of lift. A resettable

indicator shall count and indicate the pump revolutions. Before and after each sample is

collected, the pump shall air purge the suction line. Prepurges and postpurges shall be

automatically controlled, and no precalibration adjustments shall be required. The sample

stream shall not pass through any valves or metering chambers or through any distribution

tubing unless under pumped flow.

H. The sampler shall utilize a nonwetted, nonconductive detector to sense the presence of the

liquid at the inlet to the pump. The sensor shall not be dependent on or affected by any

compositional, chemical, or physical property of the liquid, including high or low

conductivity of the sample. The liquid detector shall require no routine maintenance or

cleaning to allow the detector or sampler to operate. The liquid detector shall eliminate

entering the head height in programming and shall minimize the effects of changing head,

intermittent flow in the suction line, or variable battery conditions on sample volume. Once


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the liquid has been detected at the pump inlet, the sampler shall deliver repeatable and

accurate sample volumes regardless of battery condition by counting the revolutions of the

peristaltic pump. The sampler shall deliver repeatable sample volumes typically within ±10

mL to prevent any single sample from biasing the collected sample.

2.03 Programmable Sampling System

A. The sampling program shall be established using a sealed keypad and a liquid crystal

display. The display shall continuously communicate the sampler's status. The sampler

shall have software capable of storing up to three sampling routines identified by number.

The sampler shall contain an internal battery, which provides the sampler with continuous

memory. The battery shall have a minimum life of five years and shall maintain the

sampler's program settings and any stored programs when the sampler is turned off or in

the event of a power interruption.

B. The system shall allow the user to program the sampler to collect either sequential or

composite samples at user-definable time intervals (time pacing) or at equal flow volume

intervals based on flow pulse inputs from an external flowmeter (flow pacing). The flow

intervals shall be selectable from 1 to 9,999 flow pulses. The sampler shall use an internal

real-time clock to provide both time and date information. It shall also offer two types of

time pacing: uniform and nonuniform. Uniform time paced samples shall be collected at

regular time intervals from 1 minute to 99 hours and 59 minutes. Nonuniform time

intervals from 1 to 999 minutes between samples or, based on real-time settings, shall be

capable of being programmed. Nonuniform time shall be common to both sequential and

composite sampling routines. A delay to first sample shall be programmable in minutes

from 0 to 9,999 or by the real-time clock. The sampler shall have the ability to be

programmed for up to 24 real-time sampling stop/resume times to allow unattended

sampling of shift related discharges. A software program lock shall be provided to prevent

unauthorized tampering or accidental changing of the sampler control settings.

C. The sampler program shall allow the user to select from three types of multiplexing:

samples per bottle, bottles per sample, and multiple bottle compositing (a combination of

samples per bottle and bottles per sample). Multiple bottle compositing shall allow the user

to place many samples in a single bottle while simultaneously creating a duplicate bottle or

set of bottles. The sampler shall switch bottles after a period of time has elapsed or a

predetermined number of samples have been collected. The controller shall be

programmable for up to three sample collection retries if liquid is not detected due to

suction line plugging or absence of liquid. Up to three suction line rinse cycles shall be

programmable to precondition the suction line before each sample to prevent

contamination from the previous sample.

2.04 Flow Signal

Samplers shall be capable of collecting samples proportional to flow. Flow signal shall be a 4- to

20-mA d-c current signal from an external source. Provide interface device, if necessary, for each

sampler to convert this signal to the signal used by the sampler. Interface enclosure shall be

NEMA 4. Power source for the interface device shall be the associated sampler.

2.05 Power Supply

Sixty hertz, 120-volt ac.


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2.06 Sample Containers

Provide the sampler with the following:

Two(2) 2.0-gallon polyethylene bottles.

2.07 Suction Lines and Strainers

I. The materials in contact with the flow steam shall be medical grade silicone rubber, vinyl

or Teflon, and stainless steel. The suction line shall be made of the following:

3/8-inch inside diameter vinyl

Provide a weighted polypropylene strainer with a polypropylene debris deflector to prevent

clogging.

PART 3 - EXECUTION

3.01 Installation

Install in accordance with the manufacturer's instructions.

3.02 Field Testing

Operate each sampler for 30 consecutive days, during which time no repairs or adjustments shall

be required. Assure that each sampler responds to its 4- to 20-mA flow proportional signal.

END OF SECTION

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