CITY OF LAREDO SOMBRERETILLO WASTEWATER TREATMENT PLANT ...

CITY OF LAREDO

SOMBRERETILLO WASTEWATER TREATMENT PLANT

Addendum No. 7

September 19, 2014

REVISIONS TO CONTRACT DOCUMENTS AND TECHNICAL SPECIFICATIONS

Questions and Clarifications:

Questions received by e-mail:

Question- No. 1-

Question-

What are the intentions of the architecture for the color and finish of the masonry?

Response:

We are requesting a sealed split face block, color will be selected by the Architect during the submittal phase.

Question No. 2

Question-

It looks like the fence gets painted per the notes. Is it labeled as CMU so we are assuming it is plain face gray

block, painted. We are assuming it only gets painted on the outside. Is all this correct?

Response:

Block wall to be painted on both sides.

Question No. 3-

Question-

The electrical buildings and chlorine building say CMU so we are assuming those are plain face block. The specs.

appear to have the plain face CMU with color so we are assuming those buildings are plain face CMU with integral

color. Is that correct?

Response:

Split face block, color to be selected during the submittal phase.

09-19-2014 Addendum 7 of 44

Question No. 4-

Question-

At the operations building, it looks like the interior & exterior CMU are plain face. The interior gets painted and

the exterior gets damproofing. It looks like the 4” CMU veneer is split face. It does not appear to be painted so it

looks like the operations building has a 4” split face veneer with integral color. Is that correct?

Response:

Exterior to be damproofed and sealed, split face, color to be selected during submittal phase.

Question No. 5-

Question-

Request to add in Section 11373 – AERATION EQUIPMENT: POSITIVE DISPLACEMENT BLOWERS

(CHLORINE CONTACT BASIN) – Equipment manufactured by United Blowers Inc. (UBI)

Response:

The City is not approving additional manufacturer during the bidding phase

All bidders may propose to use an alternative supplier for Major Equipment noted in the Schedule of Major

Equipment Suppliers Table (Section A-5). Include appropriate deductive price offered for any alternative supplier

proposed deemed equal in quality to those listed as Base Bid Suppliers in table. However, a Base Bid supplier must

be selected. Failure to indicate a Base Bid supplier shall render the Bidder nonresponsive. If the alternate supplier

is determined by the Engineer to not be equivalent, the Bidder shall revert back to the supplier selected in the base

bid.

Question No. 6-

Question-

Is there going to be a set of P&ID drawings released for this project?

Response:

No.

Question No. 7-

Question-

Spec Section 13446 Section is for Pressure Transmitters, 2.02B states Calibrated Range; 0 to 120 psi for booster

pumps, 0 to 40 psi for ground storage tanks. What are the equipment tag numbers for these units?

Response:

Equipment tags were provided for major equipment and valves only. These units were not assigned equipment tags

numbers.

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Question No. 8-

Question-

Addendum 4 Dwg 0700-E-02 identifies equipment Tag numbers FIT-1 through 4, What type of technology is this?

Response:

Magnetic flow meters

Question No. 9-

Question-

Addendum 4 Dwg 1100-E-03 identifies equipment Tag numbers PS-1101A & 1102A. Need a specification

Response:

Pressure switches are specified in the amended version of Section 13446.

Question No. 10-

Question-

Spec Section 11380 section 1.2 C-F Equipment Tags

C. FM-0701 - Flow Meter (RAS/WAS Station)

D. FM-0702- Flow Meter (RAS/WAS Station)

E. FM-0703- Flow Meter (RAS/WAS Station)

F. FM-0704- Flow Meter (RAS/WAS Station)

What type of device is this and what section do we use?

Response:

These are magnetic flow meter. Refer to Section 11380, paragraph 2.3 and Sheet 0700-M-01and 0700-E-01.

Question No. 11-

Question-

Specification 11380 Section 2.2 is for Chlorine Gas Detector, Please identify equipment tag numbers and dwgs?

Response:

Chlorine Leak Detectors # 1 to 4 are shown on Sheet 0900-M-01 and Sheet 0900-E-01. Specification Section No.

11380 was revised to show equipment tag numbers.

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Question No. 12-

Question-

Specification 11380 Section 2.3 is for Magnetic Flow Meters ¬ What are the equipment tag numbers and what size

are they?

Response:

Refer to response to Question 10. Flow meter shall match pipe size on drawing.

Question No. 13-

Question-

Addendum 4 Specification 13446 Section 2.02 for Pressure Transmitters, what are the equipment tag numbers and

the dwg number?

Response:


numbers

Question No. 14-

Question-

Addendum 4 Specification 13446 Section 2.03 for Pressure Gauges, what are the equipment tag numbers and the

dwg number?

Response:


numbers.

A number of pressure gauges are required and shown throughout the mechanical plans. For example, the pressure

gauges at the RAS/WAS Pump Station are shown on Sheet 0700-M-02

Question No. 15-

Question-

Addendum 4 Specification 13446 Section 2.04 for Diaphragm Seals, what are the equipment tag numbers and the

dwg number?

Response:


numbers.

Diaphragm seals are required on all pressure sensors protecting the various progressive cavity pumps. The

pressure sensor locations are shown, for example, on sheet 1100-M-04 and 1100-E-03.

Tag number for the pressure switches are noted on Sheet 1100-E-03.

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Question No. 16-

Question-

Addendum 4 Specification 13446 Section 2.05 for Level Switches ¬ Float Type, what are the equipment tag numbers

and the dwg number?

Response:


numbers.

The level switches/float type are required at the influent lift station (refer to Electrical Sheets 0200-E-01 and 0200-

E-02).

Question No. 17-

Question-

Dwg 1100-M-03 & 04 identify annular seals, pressure switches and gauges with no tag numbers, are there

equipment tag numbers for these units and is the SI to supply them?

Response:


numbers.

This shall be provided by the Contractor.

Question No. 18-

Question-

The controls for the project are difficult to follow. We are only providing the panel in the Influent Pump Station and

then the rest of the plant is supposed to communicate it’s controls to the Influent Pump Station. Basically, what

needs to be on the SCADA/HMI in the Influent Pump Panel?

Response:

A copy of the required input/output point listing is provided as an attachment.

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Additions & Deletions:

SPECIFICATIONS:

Modify: Specification Section 11066 PUMPING EQUIPMENT: VERTICAL TURBINE.

Delete: In its entirety Section (Pages 1 to 10)

Replace with:

New Section – Attached hereto (Pages 1 to 10)

Modify: Specification Section 11380 PROCESS INSTRUMENTS.


Replace with:


Modify: Specification Section 11446 PRIMARY SENSORS/TRANSDUCERS AND FIELD EQUIPMENT.


Replace with:


CONSTRUCTION PLANS:

Delete: 0100-C-60 Sheet 80 of 391 in its entirety and

Replace with: 0100-C-60 Sheet 80 of 391 dated, September 12, 2014

Delete: 0100-C-62 Sheet 82 of 391 in its entirety and

Replace with: 0100-C-62 Sheet 82 of 391 dated, September 12, 2014

Delete: 0900-M-01 Sheet 260 of 391 in its entirety and

Replace with: 0900-M-01 Sheet 260 of 391 dated, September 12, 2014

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Each Bidder is requested to acknowledge receipt of this addendum by his/her signature affixed hereto and to file same with and attached to his/her bid.

Recommended By:

_____________________________________JoEmma P. Sherfey, P.E.Sherfey Engineering Company, LLCFirm No. F-3132

Date:_________________________________

All contractors, holders of plans and specifications and all interested parties to the referenced project are hereby notified of the following revisions to the plans and/or specifications of the above referenced project.

The undersigned acknowledges receipt of this addendum and the bid submitted herewith is in accordance with the information and stipulations set forth.

Signature of Bidder________________________________________

Date: ________________________________________________________

END OF ADDENDUM NO 7CONSISTING OF 44 PAGES

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September 19, 2014

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SEC 8138 City of Laredo September 2014 Sombreretillo WWTP – Addendum No 7

PUMPING EQUIPMENT: VERTICAL TURBINE

11066 - 1

SECTION 11066


PART 1 - GENERAL

1.1 SUMMARY

A. This section includes the Work necessary to furnish and install two (2) vertical turbine non-

potable water (NPW) Pumps at the Chlorine Contact Basin as specified to make a complete

system as shown on the Drawings.

B. Unit Responsibility:

1. The Work requires that all equipment be complete with all accessories and appurtenances

be the end product of one responsible system manufacturer or responsible system supplier.

2. The CONTRACTOR shall obtain the system from the responsible supplier of the

equipment The supplier shall furnish all components and accessories of the system to

enhance compatibility, ease of operation and maintenance, and as necessary to place the

equipment in operation in conformance with the specified performance, features, and

functions.

C. Naming a manufacturer in PART 2- PRODUCTS does not relieve the manufacture from fully

complying with all the requirements of the Contract Documents. The Contract Documents

represent the minimum acceptable standards. Equipment must fully comply with all the

requirements of the specifications and construction plans.

1.2 EQUIPMENT TAGS

A. NPWP-0801 Non-Potable Water Pump No. 1

B. NPWP-0802 Non-Potable Water Pump No. 2

1.3 RELATED WORK

A. Related Sections include, but are not necessarily limited, to:

1. Section A, B, and C – Contract Documents, Special Provisions, and General Provisions.

2. Division 1 – General Requirements

a. Section 01025- Measurement and Payment

b. Section 01330- Submittal Procedure

c. Section 01340 – Shop Drawings, Product Data, and Samples

d. Section 01610 – Basic Product Requirements

e. Section 01640 – Manufacturer’s Services – Manufacturer’s Certificate of Compliance

f. Section 01740 – Warranties

g. Section 01755- Equipment Testinga nd Facility Start-up

h. Section 01782 – Operation and Maintenance Data

3. Section 09900 – Painting and Protective Coatings

4. Section 15170- Low Voltage Motors

5. Division 13- Special Construction

6. Division 16 – Electrical

1.4 REFERENCES

A. Design, manufacturing and assembly of elements of the equipment herein specified shall be in

accordance with the following:

1. American Gear Manufacturing Association (AGMA).

2. American Institute of Steel Construction (AISC).

3. American Iron and Steel Institute (AISI)

4. American Society of Mechanical Engineers (ASME).

5. American National Standards Institute (ANSI).

6. American Society for Testing Materials (ASTM).

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11066 - 2

7. American Water Works Association (AWWA).

8. American Welding Society (AWS).

9. Anti-Friction Bearing Manufacturers Association (AFBMA).

10. Hydraulic Institute Standards for Centrifugal, Rotary and Reciprocating Pumps; Hydraulic

Institute, Vertical Pump Standard; Hydraulic Institute Test Standards, Vertical Pumps – 2.6.

11. Institute of Electrical and Electronics Engineers (IEEE).

12. National Electrical Code (NEC).

13. National Electrical Manufacturers Association (NEMA).

14. Occupational Safety and Health Administration (OSHA).

15. Steel Structures Painting Council (SSPC).

16. Underwriters Laboratories, Inc. (UL).

B. Where reference is made to one of the above standards, the revision in effect at the time of bid

opening shall apply.

1.5 DEFINITIONS

A. Terminology pertaining to pumping unit performance and construction shall conform to the

ratings and nomenclature of the Hydraulic Institute Standards.

1.6 QUALIFICATIONS

A. To assure unity of responsibility, the motors and supporting sole plates shall be furnished and

coordinated by the pump manufacturer. The Contractor and manufacturer shall assume

responsibility for the satisfactory installation and operation of the entire pumping system,

including pumps, motors, sole plates and controls, as specified.

B. The equipment covered by these specifications is intended to be standard pumping equipment of

proven ability as manufactured by concerns having extensive experience in the production of

such equipment similar to the applications stated in Paragraphs 1.1 and 1.7. Units specified

herein shall be furnished by a single manufacturer. The equipment furnished shall be designed,

constructed and installed to operate satisfactorily when installed as shown on the Drawings.

C. The pump manufacturer shall be fully responsible for the design, arrangement, and operation of

all connected rotating components, including supporting sole plates, if any, of the assembled

pumping unit mounted on a fabricated steel base plate, to ensure that neither harmful nor

damaging vibrations occur at any speed within the specified operating range.

D. If equipment is offered that differs from the manufacturer listed as “A.1” in Paragraph 2.2,

equipment will be acceptable only under the following conditions. Any layout revisions and

construction of the structure, piping, appurtenance equipment, electrical work, etc required to

accommodate equipment shall be made at no additional cost to the Owner.

1.7 SYSTEM DESCRIPTION

A. The NPW pumps will pump chlorinated effluent from the Chlorine Contact Basin to the plant

NPW system.

B. A pressure relief/recirculating pressure sustaining valve shall be provided (per Section 15100,

MISCELLANEOUS VALVES and as shown on the Drawings) to prevent the pump from

operating off of its curve. CONTRACTOR shall coordinate pressure relief/recirculating valve

operation with selected pumps for proper system operation.

C. The NPW pumps will require start and stop against a closed control valve installed on each

individual pump’s discharge piping. Under normal operating conditions, the control valve will

open/close slowly during pump start/stop to minimize pressure surges. Refer to Section 15100,

MISCELLANEOUS VAVLES for control valve specifications. CONTRACTOR shall

coordinate pump control valve operation with selected pumps for proper system operation.

1.8 SUBMITTALS

A. Shop drawings and product data, in accordance with Section 01340, shall include the following:

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11066 - 3

1. Certified dimensional drawings of each item of equipment and auxiliary apparatus to be

furnished.

2. Certified foundation, pump support and anchor bolt plans and details.

3. Schematic electrical wiring diagram and other data as required for complete pump

installation.

4. Literature and drawings describing the equipment in sufficient detail, including parts list

and materials of construction, to indicate full conformance with the detail specifications.

5. Total weight of each pumping unit item, including motor, etc.

B. Design Data:

1. Manufacturer's certified rating curves, to satisfy the specified design conditions, showing

pump characteristics of discharge, anticipated field head, brake horsepower, bowl

efficiency and guaranteed net positive suction head required (NPSHR). Curves shall show

the full recommended range of performance and include shut-off head. This information

shall be prepared specifically for the pump proposed. Catalog sheets showing a family of

curves will not be acceptable.

2. Submit heat treat certificates from the stress reliever sub-vendor that the column and

discharge head fabrications have been stress relieved in an oven prior to machining.

C. Test Reports:

1. Certified report of manufacturer's routine tests for each motor.

2. Tabulated data for the drive motors including rated HP, full load RPM, power factor and

efficiency curves at 1/2, 3/4 and full load, service factor and KW input, including when the

pump is at its design point. Submit a certified statement from the motor manufacturer that

the motors are capable of continuous operation on the power supply and at the speeds

anticipated without affecting their design life for bearings or windings.

3. Description of pump factory test procedures and equipment.

4. A statement that the pump will function properly as installed with respect to the layout as

shown on the Drawings.

1.9 OPERATION AND MAINTENANCE MANUALS

A. Provide manufacturer’s Operation and Maintenance Manual(s) (O&M) and Maintenance

Summary Form(s) in accordance with OPERATION AND MAINTENANCE DATA in Section

01782.

1.10 WARRANTY

A. Equipment warranty requirements shall comply with Section 01740, WARRANTIES.

B. Submit warranty from the equipment manufacturer clearly stipulating that manufacturer’s

warranty period shall be for two (2) years commencing at final acceptance by the OWNER.

1.11 PRODUCT DELIVERY, STORAGE, AND HANDLING

A. Product, delivery, storage, and handling should comply with Section 01610, BASIC PRODUCT

REQUIREMENTS.

1.12 MANUFACTURER’S CERTIFICATES

A. Provide manufacturer’s certificate(s) in accordance with Paragraph 3.03 MANUFACTURER’S

CERTIFICATES OF COMPLIANCE in Section 01640.

1.13 SPARE PARTS

A. Furnish all special tools and test equipment required for the proper servicing of all equipment.

All such tools and test equipment shall be furnished in a suitable steel tool chest complete with

lock and duplicate keys.

B. All spare parts shall be properly protected for long periods of storage and packed in containers

that are clearly identified with indelible markings as to contents.

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11066 - 4

C. The pumping unit manufacturer shall furnish one complete set of recommended spare parts for

each pumping unit in addition to the following regardless of manufacturer recommendations:

1. One (1) complete packing seal sets including packing, bushings, rings, and followers for

each pumping unit.

2. One spare set of line shaft bearings for each pump type.

3. Sufficient motor oil to complete start-up.

PART 2 - PRODUCT

2.1 GENERAL

A. The pumping units shall all be supplied by one manufacturer and shall be complete including

pumps, motors, and appurtenances such as, but not limited to, couplings, guards and gages.

B. The pumps, motors, and controls shall be designed and built for 24-hour continuous service at

any and all points within the required range of operation, without overheating, without

cavitation, and without excessive vibration or strain. All parts shall be so designed and

proportioned as to have liberal strength, stability and stiffness and to be especially constructed to

meet the Specifications. Ample room and facilities shall be provided for inspection, repairs and

adjustment.

C. All necessary foundation bolts, nuts and washers shall be furnished and shall be Type 316

stainless steel.

D. Each major piece of equipment shall be furnished with a stainless steel nameplate with embossed

or stamped data securely mounted to the body of the equipment. As a minimum, the nameplate

for the pumps shall include the manufacturer's name and model number, serial number, rated

flow capacity, head, speed and all other pertinent data. As a minimum, nameplates for motors

shall include the manufacturer's name and model number, serial number, horsepower, speed,

input voltage, amps, number of cycles and power and service factors.

E. Pumps shall be capable of temporary operation at and near shut-off head conditions for a period

of 1minute during the time period associated with the opening and closing of the pump control

valve as the pump starts and stops.

2.2 MANUFACTURERS

A. The following pump manufacturers are approved for this project:

1. Flowserve.

2.3 CONDITIONS OF OPERATION

A. The pumps shall be identical in every respect, with all parts interchangeable.

B. Each pump shall be designed for the conditions of service tabulated as follows. All pumps shall

have a rising head capacity curve for stable pump operation from the minimum head operating

point to the shut-off head. The non-potable water pumps shall operate satisfactorily on a

continuous basis as a complete system with the pressure relief/recirculating valve to provide the

flows required throughout the plant.

C.

1. Conditions of service:

a. Service: Plant NPW

b. Number of Pumps: 2 (1 duty, 1 standby)

c. Liquid: Chlorinated Secondary Effluent

d. Maximum Temperature (°F): 90

e. Design Capacity (gpm): 450

f. Design Anticipated Total Head (ft): 180

g. Min Efficiency at Design Point (%): 80

h. Min Runout Capacity (gpm): 740

i. Min Runout Total Head (ft): 100

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11066 - 5

j. Min Efficiency at Runout Head (%): 70

k. Shut-Off Head Limits (ft): 260

l. Max Speed (rpm): 1,800

m. Max Non-Overloaded Motor Horsepower (HP): 30

n. Max Pump Discharge Nozzle Diameter (in): 6

D. Where anticipated Total Head (TH) is referred to below in conjunction with the specified

discharge requirements, it shall be understood to consist of the discharge pressure at the nozzle

in feet plus the velocity head at that point, plus the difference in elevation between the discharge

gauge and the suction well water level. The efficiency of the pump shall be understood to be

based upon the bowl efficiency.

2.4 PUMP CONSTRUCTION

A. The pumps shall be vertical turbine type, having product-lubricated shaft bearings, impellers,

and shaft connected to a vertical solid shaft induction motor. Each unit shall include bowl

assemblies, vortex suppressing suction strainer, suction barrel, discharge head, sealing assembly

and driver.

B. Pump bowls, including suction bell, shall be ASTM A48 Class 30 cast iron free of blow holes,

sand holes or other detrimental defects. The bowls shall be capable of withstanding hydrostatic

pressure equal to 150% the pressure design head operating condition or 125% of the pressure at

shutoff head, whichever is greater. The bowl shall be supplied with a top discharge case that is

machined to accept the specified size column pipe. Bronze (AZTM B-584-C932) bowl wear

rings shall be provided with combination bronze and cutless rubber bearings. All bowl hardware

shall be Type 316 stainless steel, assembled using anti-seize compound.

C. Each impeller shall be cast nickel, aluminum, low zinc bronze, or Type 316 stainless steel;

enclosed or semi-open type; statically and dynamically balanced. Bronze (ASTM B-584-C932)

wear rings shall be provided on all enclosed impellers.

D. Design of pump shafts shall comply with AWWA E101, Vertical Turbine Pumps, to handle the

torque and down thrust imposed on the shaft by the pump. Straightness and machining

tolerances of shafts shall comply with requirements of AWWA E101.

E. The pump shaft and couplings shall be Type 416 Stainless Steel pump shaft quality and shall

have a bronze bearing above and below each impeller. . Shaft couplings shall be designed with

a safety factor of 1-1/2 times the shaft safety factor and shall be have self-tightening threaded

couplings that tighten during pump operation. Line shafts larger than 2-11/16” shall utilize ring

and key type design with no threaded fasteners. Shafts shall be field replaceable. Maximum

shaft lengths shall be 5-feet and shall be turned, ground and polished straight to within 0.003

inches TIR at any point along the shaft.

F. The pump line-shaft and top shaft each shall be one piece solid shaft construction with a top

shaft impeller adjustment nut, including locking screw. The top shaft shall incorporate a non-

reverse ratchet. The pump line-shaft and top shaft shall be joined with a shaft coupling located

above the stuffing box. The coupling shall be positioned to be easily removed through the

discharge head openings.

G. Discharge columns shall be steel of flanged and bolted construction in lengths not exceeding 5-

feet. All flange hardware shall be Type 316 stainless steel assembled using anti-seize

compound. The minimum wall thickness on all columns shall be 0.375-inch.

H. Discharge heads with integral base plate shall be fabricated steel with 125 lb ANSI flanged ends.

The bottom of the baseplate shall be machined to mate with the suction barrel top flange.

Provide drain connection and pre-lubricating water connection if necessary and tap for pressure

gauge at discharge nozzle complete with 1/4-inch brass pipe nipple and T-handle cock. The top

of the discharge head shall have a registered fit for mounting driving motor. A 1-inch threaded

tap for an air valve shall be provided with plug as shown on the Drawings.

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11066 - 6

I. Line shaft bearings shall be removable self-flushing rubber type, mounted in bronze or

fabricated steel bearing spiders located at discharge column flanges on 5-foot centers maximum.

The flanges shall have machined registers on each end which are concentric within 0.005” of

each other. Column pipe 14” and smaller shall use bronze “drop-in” spiders with rubber “pop-

in” bearings. Column pipe larger than 14” shall use welded-in spiders with stainless steel

bearing supports. The lower bearing at the bell shall be of the permanently sealed grease

lubricated variety.

J. A bronze split follower and split lantern rings shall be required. The packing shall be as

manufactured by Rains-Flo sealing Systems. A three-piece adjustable coupling shall be supplied

of adequate size to handle the down thrust and the motor horsepower and torque and provide

adjustment capability for the impeller setting. Two steel-hinged coupling guards shall be

provided with openings for removal of packing, packing gland and coupling.

K. Prefabricated steel pipe suction barrels shall be provided as shown on the plan sheets. Suction

barrels shall be constructed of low carbon steel A53Gr B pipe and A36 steel or better. Mill test

reports will be furnished, if requested. Minimum suction barrel wall thickness is 0.375” and

minimum top flange thickness is 1-3/4” machined to 1-1/2”. Bottom plate thickness will be 1-

3/4” (for suction barrel OD between 16” and 24”). Each top flange shall have a drilled and

tapped bolt pattern that is equal to a standard 150# flange. These holes shall straddle the

centerline of the can inlet. The top surface shall have a minimum surface finish of 125 RMS and

include an o-ring groove with o-ring for sealing purposes. A gasket will not be acceptable. The

barrel shall have a bottom plate in equal thickness to the top flange. Four (4) evenly spaced,

3”x3”x3/8” angles, with 1” holes in each, shall be welded to the outside diameter on the barrel to

assist the installing contractor in mounting and aligning the suction barrel. The suction barrel

shall be blasted and coated as described in the painting section. The coating must meet the

requirements of the USEPA for potable water applications.

L. The construction of the pumps, position and number of column pipe flanges shall be such that

the pumps can be readily installed and removed for repairs using normal methods of operation

and handling without undue difficulties.

M. Each pump shall be equipped with a discharge pressure gage. Pressure gages shall be in

accordance with SECTION 13446, PRIMARY INSTRUMENTION DEVICES with the

following modifications listed below. Gages shall be calibrated from 0 to 150 psig. Gages shall

be 2½-inch diameter furnished with ¼-inch inlet. All fittings and cocks shall be red brass.

Pressure gages shall be furnished with isolating pulsation dampeners. All gages shall be

furnished by the pump manufacturer.

N. The natural frequency of the assembled pump and its supporting structure, shall be at least 25

percent higher than the maximum pump speed.

O. Provide a vortex type basket strainer that is securely fastened to the pump inlet. Attachment with

clips is not acceptable. All the material in the basket shall be Type 316 L stainless steel. Use

woven wire cloth screen with ½” openings. Design the approach velocity to the wire mesh

screen for 3ft/sec maximum. Basket strainer should include inverted cones and/ or baffles to

prevent vortexing.

2.5 PUMP DRIVE SYSTEM

A. Each pump shall be driven by a vertical solid shaft squirrel cage induction electric motor with

speed and maximum horsepower and speed as specified under Section 2.3, and with a TEFC

enclosure, and shall meet all the requirements of SECTION 15170, LOW VOLTAGE

MOTORS.

B. The motors shall be powered from an adjustable frequency drive which is provided under a

different specification. Pump manufacturer shall be responsible for coordinating all pump

characteristics of the motor (i.e., voltage, rpm, full load amps, etc.) with the manufacturer

providing the adjustable frequency drives specified in Section 16483LOW VOLTAGE AC

VARIABLE FREQUENCY DRIVES.

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11066 - 7

C. The pump motors shall be suitable for driving the pumps continuously over the entire pumping

range. The pump motors shall be furnished by the pump supplier. In the event of power/pump

failure or during the shutdown phase of operation, the discharged water column will be likely to

flow back towards the pump and motor while the pump control valve is closing. However, to

prevent back-rotation of the pump motor and pump, a non-reversing ratchet shall be provided for

all pumps. The manufacturer shall provide certification that the pump and motor can withstand

forces caused by flow back through the pump in the locked-ratchet condition.

D. Each pump with solid shaft shall be directly connected to its driver by means of an adjustable

coupling, suitably sized to transmit the required driving torque and be easily accessible for

impeller adjustment, packing or mechanical seal replacement.

E. All motors shall be equipped with lifting lugs and/pr eyebolts.

2.6 ACCESSORIES

A. Lifting Lugs: Equipment weighing over 70-pounds.

B. Anchor Bolts: Type 316 stainless steel sized by equipment manufacturer, ½-inch minimum

diameter, and as specified in Section 05500, METAL FABRICATION AND CASTINGS.

C. Equipment Identification Plate: 16-gauge Type 316 stainless steel with 1/4–inch die-stamped

equipment tag number securely mounted in a readily visible location.

2.7 SHOP TESTS

A. Each pump shall be factory tested with a Standard Performance Test as described in Hydraulic

Institute Test Standards, Vertical Pumps – 2.6 for vertical turbine pumps and all test data

submitted for approval by the Engineer prior to shipment. Certified copies of the calculated

pump performance curves shall be submitted including anticipated head, capacity, bowl

efficiency, total brake horsepower, NPSH and required submergence.

B. The discharge head and bowl assembly of each pump shall be hydrostatically tested in full

compliance with the Hydraulic Institute Test Standards, Vertical Pumps – 2.6.

C. Pump motor tests as specified in SECTION 1755, EQUIPMENT TESTING AND FACLITY

STARTUP shall be submitted for approval by the Engineer prior to shipment.

2.8 SURFACE PREPARATION AND SHOP PRIME PAINTING

A. Each piece of equipment in the pumping system including pump, support system and motor shall

be prepared shop-primed as specified in Section 09900. The shop primer shall be compatible

with the finish paint. Field painting is included in Section 09900. The interior of the pump

column and pump head shall be finish painted by the manufacturer prior to shipment.

B. All interior and exterior wetted surfaces of pump columns and discharge elbows and the exterior

of the bowl assemblies shall be cleaned of all rust and mill scale and supplied with a protective

coating in accordance with manufacturer's instructions.

C. All coatings on wetted surfaces shall meet NSF 61 Certification for use with drinking water

systems. Interior wetted surfaces may be coated with coating to improve bowl efficiency such as

Belzona or equal.

D. Surface preparation shall conform to the coating manufacturer’s recommendations.

PART 3 - EXECUTION

3.1 GENERAL

A. Coordinate with other trades, equipment and systems to the fullest extent possible.

B. The Contractor shall take all necessary measurements in the field to determine the exact

dimensions for all work and the required sizes of all equipment under this Contract. All

pertinent data and dimensions shall be verified by the Contractor.

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11066 - 8

3.2 INSTALLATION

A. Installation shall be in strict accordance with the manufacturer's instructions and

recommendations in the locations shown on the Drawings. Anchor bolts shall be set in

accordance with the pump manufacturer's recommendations and setting plans.

B. Connection of piping to pumps shall be done in the presence of the Engineer. All piping

connections to the pump shall be done without bending and/or twisting the piping to mate with

the pump flange connections.

C. The top flange shall be leveled within .002 of an inch per foot of diameter of the flange. The top

flange shall be seal welded inside and outside of the top of the barrel. The installing contractor

must install the suction barrels so that the barrel pipe is plumb to within .015 inches per foot of

length.

D. Stainless steel anchor bolting shall be provided by the contractor. The minimum thickness of the

concrete foundation which supports the barrel during installation is six (6) inches. The entire

suction barrel is to be encased in concrete from the cap plate to the bottom of the top flange.

E. Once the top flange is level, seal welded inside and outside, and the coating repaired, the

contractor shall form up and pour a housekeeping foundation around the top of the barrels. The

top 2” shall have anon-shrink epoxy grout poured to the underside of the top flange. The

contractor shall run piping from the couplings out beyond the concrete pad and cap with a pet

cock.

F. The contractor shall provide a millwright and a welder to level and weld the top flanges to the

barrels. The Millwright must use a machinist level to verify the levelness. A carpenter’s level is

not acceptable. The pump manufacturer shall verify the flange levelness prior to grouting and

pump installation. After welding the coatings must be repaired per the coating manufacturer’s

recommendations.

G. A certificate from the equipment manufacturer shall be submitted stating that their installation of

their equipment is satisfactory, that the equipment is ready for operation and that the Owner's

operating personnel have been suitably instructed in the operation, lubrication and care of each

unit.

3.3 FIELD FINISHING

A. Field finish equipment in accordance with Section 09900, PAINTING AND PROTECTIVE

COATINGS.

3.4 FIELD TESTS

A. In the presence of the Engineer, such operational tests as necessary to indicate that the pumps

and motors conform to the operating conditions specified shall be performed. A seven (7) day

operating period of the pumps will be required before acceptance. If a pump’s performance does

not meet the Specifications, corrective measures shall be taken or the pump shall be removed

and replaced with a pump which satisfies the conditions specified. The Contractor shall provide,

calibrate and install all temporary gauges and meters, shall make necessary tapped holes in the

pipes, and install all temporary piping and wiring required for the operational tests. Written test

procedures shall be submitted to the Engineer for approval 30 days prior to testing.

B. After installation and as soon as conditions permit full speed operation, the Contractor, in the

presence of the Engineer, shall have vibration tests performed on each unit to: a) prove

compliance with specified limitations; and b) prove that there are no field installed resonant

conditions due to misalignment, the foundation, or the connecting piping and its supports, when

operating at any speed within the specified operating range.

C. If required, the Contractor shall take corrective action and the units shall be retested to ensure

full compliance with the specifications. All costs associated with the field tests or any required

corrective action shall be borne by the Contractor.

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11066 - 9

3.5 MANUFACTURERS’ SERVICES

A. Manufacturer’s Services and Certificate of Compliance: Provide Manufacturer’s Services and

Manufacturer’s Certificate of Compliance in conformance with the requirements of Section

01640, MANUFACTURER’S SERVICES. Manufacturer’s representation shall provide

supervision of equipment installations, field inspection of equipment before startup and the

executed copies Manufacturers Services and Certificate of Compliance.

B. Manufacturer’s Representative: Present at site or classroom desingated by the OWNER, for

minimum person-days listed below, travel time excluded:

1. Manufacturer’s Assistance to the CONTRACTOR: Two (2) days and 1 trip.

2. Manufacturer’s Certificate of Proper Installation: Two (2) days and 1 trip.

3. Manufacturer’s Training Program: One (1) days and 1 trip.

END OF SECTION

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11066 - 10


09-19-2014 Addendum 7 of 44

SEC 8138 City of Laredo September 2014 Sombreretillo WWTP – Addendum No. 7

PROCESS INSTRUMENTS

11380 - 1

SECTION 11380

PROCESS INSTRUMENTS

PART 1 - GENERAL

1.1 SCOPE SUMMARY

A. The Work of this Section includes the Work necessary to furnish, install, complete and ready for

operation the field probes, meters and monitors, and their control panels and subassemblies that

collect information from plant flow as further specified and shown on the Drawings.

B. The Drawings and Specifications illustrate and specify functional and general construction

requirements of the sensors and field instruments and do not necessarily show or specify all

components, wiring, piping, and accessories required to make a completely integrated system.

C. Coordination: The CONTRACTOR shall obtain the system from the responsible supplier of the

equipment. The supplier shall furnish all components and accessories of the system to enhance

compatibility, ease of operation and maintenance, and as necessary to place the equipment in

operation in conformance with the specified performance, features, and functions.

1.2 EQUIPMENT TAGS

A. FM-0201- Flow Meter (Lift Station)

B. FM-0202- Flow Meter (Lift Station

C. FM-0701- Flow Meter (RAS/WAS Station)

D. FM-0702- Flow Meter (RAS/WAS Station)

E. FM-0703- Flow Meter (RAS/WAS Station)

F. FM-0704- Flow Meter (RAS/WAS Station)

G. DO-0401- DO Probe (BNR Basin)

H. DO-0402- DO Probe (BNR Basin)

I. DO-0403- DO Probe (BNR Basin)

J. DO-0404- DO Probe (BNR Basin)

K. DO-0801- DO Probe (Chlorine Contact Basin)

L. DO-0802- DO Probe (Chlorine Contact Basin)

M. USL-0301- Ultra Sonic Level Sensor (Headworks) Fine Screen No. 1

N. USL-0302- Ultra Sonic Level Sensor (Headworks) Fine Screen No. 1

O. USL-0303- Ultra Sonic Level Sensor (Headworks) Fine Screen No. 2

P. USL-0304- Ultra Sonic Level Sensor (Headworks) Fine Screen No. 2

Q. USL-0801- Ultra Sonic Level Sensor (Chlorine Contact Basin)

R. CLD-0901- Chlorine Leak Detector (Chlorine Building)

S. CLD-0902- Chlorine Leak Detector (Chlorine Building)

T. CLD-0903- Chlorine Leak Detector (Chlorine Building)

U. CLD-0904- Chlorine Leak Detector (Chlorine Building)

1.3 RELATED WORK

A. Related Sections include, but are not necessarily limited, to:

1. Section A, B, and C – Contract Documents, Special Provisions, and General Provisions.

2. Division 1 – General Requirements

a. Section 01025- Measurement and Payment

b. Section 01330- Submittal Procedure

c. Section 01340 – Shop Drawings, Product Data, and Samples

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PROCESS INSTRUMENTS

11380 - 2

d. Section 01610 – Basic Product Requirements

e. Section 01640 – Manufacturer’s Services – Manufacturer’s Certificate of Compliance

f. Section 01740 – Warranties

g. Section 01755- Equipment Testing and Facility Start-up

h. Section 01782 – Operation and Maintenance Data

3. Division 13- Special Construction

4. Division 16 – Electrical

1.4 REFERENCES

A. Not Applicable

1.5 DEFINITIONS

A. Not Applicable

1.6 QUALIFICATIONS

A. The Units specified shall be the products of reputable manufacturers who have been regularly

engaged in the design, manufacture and furnishing of this equipment in wastewater treatment

plants for at least ten (10) years.

1.7 SUBMITTALS

A. General:

1. Provide Shop Drawings, samples, administrative, quality control, and contract closeout

submittals in accordance with the requirements of Section 01330, SUBMITTAL

PROCEDURES, Section 01782, OPERATIONS AND MAINTENANCE DATA, Section

01640, MANUFACTURERS’ SERVICES, and as listed below.

B. In addition, the Following Specific Information shall be provided:

1. Complete manufacturer’s drawings and literature.

2. Control panel descriptive literature and schematic control diagrams.

1.8 OPERATIONS AND MAINTENANCE MANUAL

A. Provide manufacturer’s Operation and Maintenance Manual(s) (O&M) and Maintenance

Summary Form(s) in accordance with OPERATION AND MAINTENANCE DATA in Section

01782.

1.9 WARRANTY

A. Equipment warranty shall comply with Section 01740, WARRANTIES.

B. Submit warranty from the equipment manufacturer clearly stipulating that manufacturer’s

warranty period shall be for two (2) years commencing at final acceptance by the OWNER.

C. The DO Probe shall be warranted for three (3) years against defects in material and

workmanship commencing at final acceptance by the OWNER.

1.10 SPARE PARTS

A. One (1) spare sensor cap.

PART 2 - PRODUCTS

2.1 DISSOLVED OXYGEN PROBE AND ANALYZER

A. GENERAL

1. The dissolved oxygen probe shall be a continuous-reading probe that utilized luminescent

sensor technology with no calibration and minimal maintenance requirements.

2. Unit shall provide an output signal to an analyzer/controller suitable for monitoring and

control purposes.

B. MANUFACTURERS

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PROCESS INSTRUMENTS

11380 - 3

1. The analyzer shall be Advanced HACH LDO® Probe, Model 2, by the Hach Company or

Approved Equal.

2. The probe shall be furnished with choice of pole or ball-float mount kit.

a. Probe Mount

1) Pole Mount Kit, PVC (Hach 9253000) or Approved Equal.

2) Ball Float Mount Kit, PVC (Hach 9253100) or Approved Equal.

b. Controller

1) SC200 Controller, 2 channels, digital (Hach LXV404.99.00552) or Approved

Equal.

C. PERFORMANCE REQUIREMENTS

1. Dissolved Oxygen Analyzer Assembly

a. Accuracy: plus or minus 0.05 ppm (< 1 ppm), plus or minus 0.1 ppm (>1 and <5 ppm)

and plus or minus 0.2 (> 5 ppm).

b. Repeatability: 0.1 ppm.

c. Measuring Range: 0.00 to 20.00 mg/L dissolved oxygen.

d. Operating Temperature Range: 32 to 122 degrees F.

e. Response Time: T95 , 60 seconds.

2. The operation of the analyzer shall not be affected y H2S, pH, K+1

, Na+1

, Mg+2

, Ca+2

, NH4+1

,

Al+3

, Pb+2

, Cd+2

, Zn+2

, Cr (total), Fe+2

, Fe+3

, Mn+2

, Cu+2

, Ni+2

, CO+2

, CN-1

, NO3-1

, SO4-2

,S-2

,

PO4+3

, CI-1

, anion active tensides, crude oils, or CI2-1

.

3. The probe shall provide electrolyte-free operation without the requirements of sample

conditioning.

D. MATERIALS AND ACCESSORIES

1. Materials

a. The probe material shall be foamed Noryl® and 316 stainless steel. All parts of the

probe shall be corrosion-resistant and fully-immersible.

b. The sensor material shall be polybutyl methoacrolate.

2. Accessories

a. Sufficient cable for installation between sensor and analyzer/controller as indicated in

the Drawings.

b. One mounting bracket per sensor for fixing the sensor assembly to hand railing or other

fixed support.

c. All mounting hardware required for mounting shall be provided.

2.2 CHLORINE LEAK DETECTOR

A. Sensor

1. Type:

a. Electrochemical type sensor.

2. Function/Performance:

a. Operating Range: 32 to 104 degrees F.

3. Physical:

a. Suitable for remote mounting up to 1000 ft (305 m) from the receiver.

b. NEMA 4X housing.

4. Accessories Required:

a. Sufficient cable as recommended by the manufacturer for installation between sensor

and transmitter.

b. Sensors shall be fitted with a splash guard to prevent accidental wetting.

B. Transmitter

1. Type:

a. Microprocessor-based compatible with sensor provided.

b. Single channel.


a. Linearity: plus or minus 10 percent of full scan or 2 ppm.

b. Repeatability: plus or minus 4 percent of full scan or 2 ppm.

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PROCESS INSTRUMENTS

11380 - 4

c. Range: 0 to 10 ppm.

d. Operating Temperature: 32 to 104 degrees F.

e. Output: Two alarm contacts rated for 5A at 240 VAC, individually configurable over

the range of the transmitter.

f. Display: LED indicators for display of alarm conditions.

3. Physical:

a. Suitable for surface mounting.

b. NEMA 4X enclosure.

c. Power Requirements: 7 to 30 VDC.

4. Accessories Required:

a. One-year supply of calibration and test gas for the number of detectors indicated on the

Drawings or in the Instrument Schedule.

b. One calibration kit including calibrator, fittings, hoses, and other components required

for detector calibration.

C. Manufacturer(s)

1. Wallace & Tiernan.

2. MSA Ultima XA Series.

3. Approved Equal.

2.3 MAGNETIC FLOW METER

A. Flow Element

1. Type:

a. Pulsed DC type.


a. Operating Temperature: Process liquid temperatures of 0 to 140 degrees F or greater

dependent upon liner and an ambient of minus 30 to 150 degrees F.

b. Radio Frequency Interference (RFI) protection: RFI protection shall be provided as

recommended by the manufacturer.

c. Pressure rating: Equal to piping system where meter is installed.

d. Additional: Meter shall be capable of running empty indefinitely without damage to

any component.

3. Physical:

a. Metering Tube: 304 stainless steel or equivalent.

b. Flanges: ANSI 150 lb. or DIN PN 16 carbon steel, as required by the piping system,

unless otherwise indicated. ANSI 150 lb. or DIN PN 16 stainless steel flanges shall be

used on all SS process pipes.

c. Liner:

1) RAS and WAS Gravity Flowmeters: PTFE or PFA to provide minimum potential

for solids build-up.

2) Other flow streams: Polyurethane or composite elastomer unless otherwise

indicated on the Drawings or in the Instrument Schedule.

d. Electrodes: 316 stainless steel standard minimum requirements. All electrodes to be

compatible with process fluid as indicated on the Drawings or electrodes to be supplied

as listed in the Instrument Schedule.

e. For sludge, polymer, or any slurry application where the electrodes will be coated, a

self-cleaning or a removable electrode option must be provided with that meter.

f. Housing: Meters below grade shall be suitable for submergence for up to 48 hours to a

depth of 30 ft (9m). Meters above grade shall be NEMA 4X (IP65). Where hazardous

areas are indicated on the Drawings, the equipment shall be rated for that area.

g. Finish: All external surfaces shall have a chemical and corrosion resistant finish.

4. Power Requirements:

a. Meter shall be 24 VDC powered instrument, receiving its power from transmitter.

5. Accessories/Documentation Required:

a. Factory calibration: All meters shall be factory calibrated. A copy of the report shall be

included in the O&M manual.

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PROCESS INSTRUMENTS

11380 - 5

b. Grounding: Meter shall be grounded in accordance with the manufacturer’s

recommendation. Provide ground ring, ground wires, gaskets, etc., as required. All

materials shall be suitable for the liquid being measured and must be compatible with

process fluid and with the process pipe.

c. Signal cable for installation between the flowtube and the transmitter. Length shall be

as required by installation indicated on the Drawings.

B. Flow Converter/Transmitter

1. Type:

a. Microprocessor based, intelligent transmitter compatible with flowtube provided.

b. Mounted remote from the flowtube.


a. Accuracy (including flowtube): Plus/minus 0.5 percent of flowrate.

b. Operating Temperature: –20 to 140 degrees F.

c. Output: Isolated 4-20 mA with HART protocol. Current output adjustable over the full

range of the instrument. A dry contact rated for 120 VAC, 2A to indicate reverse flow.

d. Diagnostics: Self diagnostics with on-screen display of faults.

e. Display: Digital indicator displaying flow in engineering units indicated in the

Instrument Schedule.

f. Totalizer: A fully configurable totalizer integral to the transmitter. Totalized flow

shall be displayed.

g. Empty Tube Zero: The transmitter shall include a feature that will lock the output at

zero when no flow is detected. The empty tube zero feature shall be enabled

automatically when the transmitter detects no flow or manually through a contact input.

h. Provide electrode cleaning unit to match flow element requirements.

3. Physical:

a. Transmitter shall be suitable for surface or pipe stand mounting.

b. Enclosure shall be NEMA 4X (IP65).

4. Power Requirements:

a. The transmitter shall be 120 VAC powered instrument.

5. Accessories/ Required:

a. Keypad where required for transmitter configuration.

C. Manufacturer:

1. Endress & Hauser.

2. ABB Instruments MagMaster.

3. Krohne Optiflux 2000 or 4000 Series with IFC-3000 Transmitter.

4. Siemens FM MAGFLO Meter and MAG 5000/6000 Transmitter.

5. Rosemount Series 8705 Meter & 8712 Transmitter.

2.4 ULTRASONIC LEVEL METER

A. Transducer

1. Type

a. Non-contact, ultrasonic level transducer.

2. Function/Performance

a. Measuring Range: Transducer range shall be suitable for the installation indicated on

the Drawings, up to 50 ft (15m).

b. Temperature Range: –20 to 60 degrees C.

c. Relative Humidity: Zero to 100 percent.

d. Temperature Compensation: Transducers shall be provided with integral temperature

sensors for temperature compensation at temperature ranges from -50° to 150° C.

3. Physical

a. Transducers shall be potted/encapsulated in a Kynar or other chemical and corrosion-

resistant housing. Where indicated on the Drawings, transducers shall be approved for

installation in Class I, Division 1, Groups C and D (Zone 0) environments.

b. The surface of transducers shall be Teflon-coated where mounted on chemical tanks

and exposed to vapors in the tanks that are not compatible with the transducer material.

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PROCESS INSTRUMENTS

11380 - 6

c. Transducers shall be capable of being completely submerged without damage.

d. Transducers shall be suitable for surface, pipe, or flange mounting as indicated on the

Drawings or Instrument Schedule. Appropriate mounting hardwired shall be provided.

Flanges shall be six inch (150 mm) and resistant to attack by the medium being

metered or, where required, shall be protected by corrosion-resistant coatings and

facings.

4. Options/Accessories Required

a. Transducers located in areas where freezing condensation may occur shall be provided

with special heaters or other type of transducer protection designed to prevent sensor

icing.

b. Signal cable as recommended by the manufacturer, for installation between the

transducer(s) and the transmitter. Length, up to 1200 feet (365 m), shall be as required

by installation indicated on the Drawings.

5. Manufacturer(s)

a. Siemens Echomax series.

b. Or Approved Equal.

B. Transmitter/Converter

1. Type

a. Microprocessor based compatible with the transducer(s) provided.

2. Function/Performance

a. Resolution (including transducer): Plus or minus 0.1 percent of range or 0.08 inches (2

mm), whichever is greater.

b. Accuracy (including transducer): Plus or minus 0.25 percent of range or 0.24 inches (6

mm).

c. Range: As required by the installation indicated on the Drawings.

d. Temperature Range: -20 to 50 degrees C.

e. Output: Two isolated 4-20 mA output and one, three, or six alarm contacts adjustable

to trip at any point in the instrument range. Output contacts shall be rated 5 A at 230

VAC.

f. Temperature Compensation: Compensation over the temperature range of the sensor.

g. Display: Digital indicator displaying level/differential level or volume in engineering

units or percent as indicated on the Drawings or in the Instrument Schedule.

h. Diagnostics: On-screen instructions and display of self-diagnostics.

i. Loss of Signal: Transmitter shall ignore momentary loss-of-echo signals and shall

indicate loss of echo on the transmitter unit.

j. Configuration Protection: Programmable parameters shall be protected using

E2PROM. Battery backup protection is not acceptable.

3. Physical

a. Transmitter shall be suitable for surface or pipe stand mounting.

b. Enclosure shall be NEMA 4X (IP65).

c. A/C power will be as specified in Division 16.

4. Accessories Required

a. Hand-held programmer where required for configuration and calibration of the

instrument.

5. Manufacturer(s)

a. Siemens HydroRanger 200

b. Or approved equal.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Unit shall be installed in accordance with the manufacturer’s recommendations and as shown on

the Drawings.

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PROCESS INSTRUMENTS

11380 - 7

3.2 MANUFACTURER STARTUP AND TRAINING SERVICES

A. See SECTION 1755 EQUIPMENT TESTING AND FACILITY START-UP for required

equipment testing and startup services.

END OF SECTION

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FJD 8138 City of Laredo September 2014

Sombreretillo WWTP – Addendum No 7

PRIMARY SENSORS/TRANSDUCERS AND FIELD EQUIPMENT 13446 - 1

SECTION 13446

PRIMARY SENSORS/TRANSDUCERS AND FIELD EQUIPMENT

PART 1 GENERAL

1.01 DESCRIPTION

A. Scope:

1. Furnish, install, calibrate, test, adjust and place into satisfactory operation

the primary sensors/transducers, controls, programmable controllers,

power supplies, and field instruments as shown on the Drawings, as

specified herein and as specified in Section 11380

2. The drawings and specifications illustrate and specify functional and

general construction requirements of the sensors/transducers, controls,

programmable controllers, power supplies, and field instruments and do

not necessarily show or specify all components, wiring, piping and

accessories required to make a completely integrated system. The

Contractor shall provide all components, piping, wiring accessories and

labor required for a complete workable and integrated system.

3. The Contractor shall install all taps in the process piping systems for

installation of flow, temperature and pressure sensing instrumentation.

B. Coordination:

1. Coordinate with others for installation of all items specified herein and

required to ensure the complete and proper interfacing of all the

components and systems.

1.02 QUALITY ASSURANCE

A. Comply with the general requirements of Section 13440.

B. Acceptable Manufacturers:

1. Unless otherwise permitted as described below, furnish primary

sensor/transducers, controls, programmable controllers, power supplies,

and field instruments by the named manufacturers.

2. The named manufacturers have been specified to establish the standard of

quality and performance of the equipment to be supplied.

3. For items where the words "or equal" are indicated, "equal" manufacturers

must be found acceptable through the procedures outlined in the General

Conditions.

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4. Obtain all sensor/transducers and field instruments of a given type from

the same manufacturer.

C. Manufacturers' Responsibilities and Services:

1. Design and manufacture of the primary sensors/transducers and field

instruments shall be in accordance with the applicable general design

requirements specified in Section 13440 and the detailed specifications

herein.

2. Field supervision, inspection, startup and training in accordance with the

requirements of this and other Division 13000 sections.

1.03 PRODUCT DELIVERY, STORAGE AND HANDLING

A. Comply with the requirements specified in Section 13440.

B. The sensors/transducers and field instruments shall not be delivered to the site

until all plant monitoring and control system shop drawings have been approved.

PART 2 PRODUCTS

2.01 GENERAL

A. Identification Tags: All sensor/transducers, controls, programmable controllers,

power supplies, and field instruments shall have an identification tag or nameplate

meeting the following requirements:

1. Tag numbers shall be placed on all sensor/transducer and field

instruments.

2. The identifying tag number shall be permanently etched or embossed onto

a stainless steel tag which shall be fastened to the device with stainless

steel rivets or self tapping screws of appropriate size.

3. Where neither of the above fastenings can be accomplished, tags shall be

permanently attached to the device by a circlet of stranded stainless steel

wire rope.

4. All sensor/transducers and field instruments mounted on or within panels

shall have the stainless steel identification tag installed so that the numbers

are easily visible to service personnel. Panel mounted devices shall have

the tag attached to the rear of the device.

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B. Pressure Sensing Lines and Accessories for Pressure Gauges and Pressure

Switches not assembled as part of in-line pressure sensor assemblies:

1. For Process Sensing Taps in Ductile Iron, Steel, and Stainless Steel Piping

Systems

a. Material and Fittings: Type 316 Stainless Steel Pipe (ASTM

A/312) and threaded fittings and adapters (ASTM A403) in

accordance with Section 15061, Part 2.1.B.

b. Sizes: ½-inch minimum for main sensing piping and 1/4-inch

gauge and switch connections.

c. Pressure Rating: Equal to or greater than 200 psig.

d. Accessories:

1) For applications not requiring diaphragm seals, provide

separate 1/4-inch 316 stainless steel threaded gauge cocks

for each gauge and switch.

2) For applications requiring diaphragm seals, provide a

separate ½ inch threaded 316 stainless steel ball valve for

seal process side shutoff for each gauge and switch. Ball

valves shall be provided in accordance with specifications

for Type BA-5.

2.02 PRESSURE TRANSMITTERS

A. Function: Measure a pressure and produce an analog output signal

directly proportional to that pressure or level.

B. Performance Specifications:

1. Calibrated Range: 0 to 120 psi for booster pumps, 0 to 40 psi for

ground storage tanks.

2. Accuracy: +0.25 percent of calibrated span.

3. Repeatability: .05 percent of calibrated span.

4. Hysteresis: 0.05 percent of calibrated span.

5. Output: 4-20 mA dc direct acting.

C. Required Features and Accessories:

1. Solid state smart electronic components.

2. Positive over-range protection to at least 2000 psig.

3. Calibration Adjustments:

a. Zero: Adjustable with external adjustment screw

located behind protective hinged cover.

b. Span: Coarse and fine span adjustments.

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4. Adjustable internal damping.

5. Measuring elements protected by sealing diaphragm.

6. Built-in electrical surge and RFI protection.

7. Valves:

a. Single stainless steel ball shutoff valve at each

process line tap to enable live process removal of

transmitter.

b. 316 Stainless steel three valve manifold for shutoff

and pressure equalization on differential pressure

and flow measurement applications.

8. Electrical Conduit Connection: ½-inch NPT.

9. Process Connection: ½-inch NPT unless otherwise

specified.

10. Designed to operate on power from receiver or remote

power supply, nominal 24 VDC.

11. Stainless steel mounting bracket and hardware suitable for

mounting transmitter on flat vertical surface or 2 inch

diameter pipe.

12. Process Wetted Parts: 316 stainless steel.

13. Non-Wetted Parts:

a. Body and Process Connection Bolting: Stainless

steel.

b. Housing and Cover: Die cast low copper aluminum

alloy finished with epoxy paint system; covers to be

threaded and seats on Buna-N O-rings, NEMA 4

rating.

c. Capsule Fill Liquid: Silicone oil.

14. Indicator: Provide integral indicator with 0 to 100 percent

scale; provide stainless steel tag to indicate 100 percent

value of range in engineering units as specified in schedule.

D. Manufacturer and Model Number:

1. Invensys IGP10 or approved equal.

2.03 PRESSURE GAUGES

A. Type: Bourdon tube type pressure element, liquid filled gauge for

measuring water and air pressure.

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B. Performance Requirements:

1. Accuracy: +0.5 percent of span (ANSI B40.1 Grade 2A).

2. Range and Scale: As required for application.

C. Construction Features:

1. Case:

a. Solid front design constructed of glass filled

polyester.

b. Color: Black unless otherwise specified.

2. Ring: Threaded, glass filled polyester.

3. Full blowout back.

4. Window: Glass.

5. Dial: White with black marking.

6. Bourdon Tube and Socket: 316 Stainless Steel, heliarc

welded.

7. Movement: Cam and roller movement.

8. Size: 4-1/2-inch.

9. Connection: 1/4-inch male NPT back or bottom as

required.

10. Pressure Snubber: Sintered stainless steel snubber, brass

housing, 1/4 NPT male and female connections.

11. Filling Liquid: Silicone oil.

12. Gauge Cock: Provide 1/4 NPT 316 stainless steel gauge

cock for pressure gauges not assembled with pressure

sensor assemblies or diaphragm seals.

D. Point Of Installation

1. Provide a pressure gauge at the suction and discharge of

each disinfection related water booster pump, the common

air header discharge of the main aeration blowers, the

common air header of the Chlorine Contact Basin aeration

blowers, the discharge of the NPW booster pumps, the

suction and discharge of each of the RAS and WAS pumps,

the discharge of the BNR Basin scum pump, the wash

water connection to each of the Headworks screens, the

potable water supply to the Administration Building and

the wash water pump for the belt filter press or any other

areas as stated on the Drawings. All shall indicate the

pressure in psig for water sensing applications and psig and

inches of water gauge for air pressure installations.

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E. Manufacturer and Model:

1. Weksler, Series 300.

2. Or approved equal.

2.04 DIAPHRAGM SEALS

A. General:

1. Furnish diaphragm seals for all pressure gauges, switches and

transmitters associated with the RAS and WAS pumps and the Belt

Filter Press feed pumps.

B. Construction Features required for all seals:

1. Filling Liquid: Silicone.

2. Provide fill/bleed screw to permit filling of instrument and

diaphragm seal.

3. Provide flushing connection to allow venting and introduction of

flushing water on the process side of the diaphragm.

4. Instrument Connection: 1/4-inch NPT.

5. Process Connection: ½-inch NPT.

C. Manufacturer and Model:

1. Red Valve.


2.05 LEVEL SWITCHES - FLOAT TYPE

A. Type: Displacement type, pear shaped, liquid level sensor.

B. Construction Features:

1. Float Body: Hollow hermetically sealed, rigidly molded of

polypropylene containing mercury switch and eccentric metal

weight.

2. Mercury Switch: Hermetically sealed SPDT switch rated 8 amps

ac/5 amps dc, cushioned and mounted along main axis at about 65

degree inclination.

3. Weight: Weight to cause sensor to hang straight down from cable

when not immersed and only allow float to pivot when immersed

in liquid.

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4. Electrical Cable:

a. Heavy duty, three conductor, flexible and submersible

cable, sheathed in PVC and connected to float and switch

with watertight seal.

b. Length furnished to be sufficient to extend to control

junction box provided for the sump pumps.

C. Point Of Use

1. Provide float switches in each of the secondary containment tanks

associated with the Chemical Building, and for the Pump Building

sump pump controls

D. Manufacturer and Model Number:

1. Flygt, Model ENH-1O.


2.06 EFFLUENT FLOW TRANSMITTER

A. Furnish and install the following level transmitters:

1. Install a Siemens HydroRanger 200 ultrasonic transmitter or

Engineer approved equal by Endress & Hauser. The unit shall be

equipped with a XPS-15 transducer. Provide a sufficient amount

of cable to extend to the indicated location of the level transmitter

with now less than a ten (10) foot excess. The transducer shall be

equipped with a 6” mounting flange and a submergence shield.

Mounting brackets shall be fabricated 316 stainless steel.

2.07 LIFT STATION LEVEL TRANSMITTERS

A. Manufacturer:

Endress and Hauser: Model FMK165-AKA 10C .

Blue Ribbon: Model Birdcage GP: 50 (15, 30 psi)

AMETEK: Model 575P

B. Description: Solid-state two-wire submersible electronic differential

pressure transmitter with 4-20 mA output proportional to input pressure.

C. Range: 0-30 feet range, or as required by wet well depth, with +/- 0.3 %

accuracy and 0.5% max temperature across calibrated span.

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D. Power: Loop-powered, 24 VDC

E. Spare Unit: Provide a spare unit in addition to the unit installed.

F. Transmitters to be calibrated to match the chart recorder range.

G. Warranty: 18 months minimum from the time acceptance by City.

2.08 PRESSURE SWITCHES

A. NEMA 4X enclosed pressure switch with dual, adjustable deadband set

points and automatic reset functionality.

B. Switch contacts shall be hermetically sealed and rated as general purpose.

C. The actuator seal shall be Buna-N.

D. Pressure switch shall be an Ashcroft L-Series or approved equal.

PART 3 EXECUTION

3.01 INSTALLATION

A. Install each item in accordance with manufacturer’s recommendations and in

accordance with the Contract Documents. Transmitters and instruments require

access for periodic calibration or maintenance shall be mounted so they are

accessible while standing on the floor.

B. All items shall be mounted and anchored using hot dip galvanized after

fabrication structural steel channel with stainless steel hardware throughout unless

otherwise noted.

C. Conform to all applicable provisions of NEMA standards and NEC when

installing the equipment and interconnecting wiring.

3.02 START-UP, CALIBRATION, AND TESTING AND TRAINING

A. Comply with the requirements of Sections 13440, and 13446 as well as the

requirements of this section.

B. Loop sheets (ISA S5.4 minimum) shall be prepared by the General Contractor and

supplied to the Owner in an AutoCAD Version 2012 on a DVD/CD ROM for use

on a Windows compatible computer.

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C. All instruments shall be checked out and fully calibrated prior to start-up of the

system as well as during the term of the project until substantial acceptance as

required.

D. All wiring shall be rung-out prior to initiating operation to assure proper

interconnection. All power wiring shall be meggered and formal testing forms

shall record this information. The Owner shall be notified as to when any such

testing is to be conducted so that an Owner's representative can be present to

witness the testing. All such testing result information shall be formally

submitted to the Owner in typewritten form.

E. The Contractor shall plan, schedule and conduct a field test for the overall control

and monitoring system. This field test shall include the testing of all instruments,

all I/O points, all alarms, and all monitoring and control loops. This field test

shall be witnessed by the Engineer and the Owners representative.

END OF SECTION

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DD

B B

V

-

1

4

2

0

/

1

4

8

0

Z

1

P

T

PLAN

SIDE VIEW

SECTION A-A

TOP SLAB

WALL

SECTION B-B

TYPICAL STORM MANHOLE COVER

V

-

1

4

2

0

/

1

4

8

0

Z

1

P

T

COVER SECTION

FRAME SECTION

PICKHOLE DETAIL

104 Del Court - Suite 400Laredo, Texas 78041 - (956) 791-3511

T.B.P.E. FIRM REGISTRATION No. F-3132

San Antonio, Texas 782168400 Blanco Road, Ste. 201


SANITARY AND STORM SEWER DETAILS

0100-C-60

MANHOLE CONCRETE COLLAR DETAIL

1

SANITARY SEWER MANHOLE VENT FOR SEALED MANHOLE

2

SAFETY END TREATMENT TYPE "P"

3

2-WAY DROP INLET

4

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CONCRETE SIDE DRAIN DETAIL

SECTION A-A

DETAIL 1

EDGE

1

REDUCED PRESSURE PRINCIPLE ASSEMBLY

BACK FLOW PEVENTER INSTALLATION DETAIL

3

DOUBLE CHECK DETECTOR ASSEMBLY

BACKFLOW PREVENTOR DETAIL

(ABOVE GROUND)

PLAN

ELEVATION

2

TYPICAL 3/4" AND 1"

TYPICAL WATER SERVICE INSTALLATION

4

GRAVEL RIP-RAP DETAIL @

SAFETY END TREATMENTS

5

PLAN

SECTION A-A





MISCELLANEOUS CIVIL DETAILS

0100-C-62

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CHLORINATOR

ROOM

CHLORINE

STORAGE ROOM

EMERGENCY

CHLORINE DRY

SCRUBBER AREA

PLAN

D

260 262

C

260 262

A

260 261

B

260 262

6

385

HOSE

RACK

385

NON-FREEZE

HOSE BIBB

1

ELECTRICAL

BUILDING

385

4

385

EMERGENCY SHOWER

AND EYEWASH STATION

4

263

PURGE

CONNECTION

1

263

PURGE

CONNECTION

1

386

CLEAN OUT AT

GRADE DETAIL

4





CHLORINE BUILDING - MECHANICAL PLAN

0900-M-01

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Process Equipment Location Present(P)/ Future(F) Equipment Description I/O Point Description Signal Signal Source

Electrical Building No. 2 P Control Panel No.2 Surge Suppressor Control Power Surge DI Control Panel Electrical Building No. 2 P Control Panel No.2 Incoming 120V Power Power Failure Alarm and Pump Shutdown DI Control Panel Electrical Building No. 2 P Control Panel No.2 UPS Power UPS Trouble Alarm DI Control Panel

Influent Lift Station P West Primary Transducer/Transmitter West Well Level AI Lift Sta. West RackInfluent Lift Station P West Secondary Transducer/Transmitter West Well Level AI Lift Sta. West RackInfluent Lift Station P West Well Level Recorder West Well Level AO Control Panel PLCInfluent Lift Station P West Well Level Transducers West Well High Level Alarm DO Control Panel PLCInfluent Lift Station F West Well Pump No. 1 West Well Transducers Call To Run DO Control Panel PLCInfluent Lift Station F West Well Pump No. 2 West Well Transducers Call To Run DO Control Panel PLCInfluent Lift Station P West Well Pump No. 3 West Well Transducers Call To Run DO Control Panel PLCInfluent Lift Station P West Well Pump No. 4 West Well Transducers Call To Run DO Control Panel PLCInfluent Lift Station P West Well Float Switches West Well Low Low Level Shutdown DI FIELDInfluent Lift Station P West Well Float Switches High High Level Float Transfer From Transducer To Floats DI FIELDInfluent Lift Station P Sluice Gate No. 3 In East/ West E\Well Wall Gate Full Open DI FIELDInfluent Lift Station P Sluice Gate No. 3 In East/ West E\Well Wall Gate Full Closed DI FIELDInfluent Lift Station F West Well Pump No. 1 Call To Run DI Control Panel RelaysInfluent Lift Station F West Well Pump No. 1 Auto/Manual Switch in Auto DI Control Panel SwitchInfluent Lift Station F West Well Pump No. 1 Auto/Manual Switch in Manual DI Control Panel SwitchInfluent Lift Station F West Well Pump No. 1 VFD "On" DI VFDInfluent Lift Station F West Well Pump No. 1 Common Shutdown Alarm DI VFDInfluent Lift Station F West Well Pump No. 1 VFD Speed Command AO VFDInfluent Lift Station F West Well Pump No. 1 VFD Running Speed AI VFDInfluent Lift Station F West Well Pump No. 2 Call To Run DI Control Panel RelaysInfluent Lift Station F West Well Pump No. 2 Auto/Manual Switch in Auto DI Control Panel SwitchInfluent Lift Station F West Well Pump No. 2 Auto/Manual Switch in Manual DI Control Panel SwitchInfluent Lift Station F West Well Pump No. 2 VFD "On" DI VFDInfluent Lift Station F West Well Pump No. 2 Common Shutdown Alarm DI VFDInfluent Lift Station F West Well Pump No. 2 VFD Speed Command AO VFDInfluent Lift Station F West Well Pump No. 2 VFD Running Speed AI VFDInfluent Lift Station P West Well Pump No. 3 Call To Run DI Control Panel RelaysInfluent Lift Station P West Well Pump No. 3 Auto/Manual Switch in Auto DI Control Panel SwitchInfluent Lift Station P West Well Pump No. 3 Auto/Manual Switch in Manual DI Control Panel SwitchInfluent Lift Station P West Well Pump No. 3 VFD "On" DI VFDInfluent Lift Station P West Well Pump No. 3 Common Shutdown Alarm DI VFDInfluent Lift Station P West Well Pump No. 3 VFD Speed Command AO VFDInfluent Lift Station P West Well Pump No. 3 VFD Running Speed AI VFDInfluent Lift Station P West Well Pump No. 4 Call To Run DI Control Panel RelaysInfluent Lift Station P West Well Pump No. 4 Auto/Manual Switch in Auto DI Control Panel SwitchInfluent Lift Station P West Well Pump No. 4 Auto/Manual Switch in Manual DI Control Panel SwitchInfluent Lift Station P West Well Pump No. 4 VFD "On" DI VFDInfluent Lift Station P West Well Pump No. 4 Common Shutdown Alarm DI VFD

CITY OF LAREDO SOMBRERETILLOWASTEWATER TREATMENT PLANT I/O LISTING

ELECTRICAL BUILDING No. 2 - CONTROL PANEL No. 2

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Influent Lift Station P West Well Pump No. 4 VFD Speed Command AO VFDInfluent Lift Station P West Well Pump No. 4 VFD Running Speed AI VFD

Influent Lift Station P East Primary Transducer/Transmitter East Well Level AI Lift Sta. East RackInfluent Lift Station P East Secondary Transducer/Transmitter East Well Level AI Lift Sta. East RackInfluent Lift Station P East Well Level Recorder East Well Level AO Control Panel PLCInfluent Lift Station P East Well Level Transducers East Well High Level Alarm DO Control Panel PLCInfluent Lift Station P East Well Pump No. 5 East Well Transducers Call To Run DO Control Panel PLCInfluent Lift Station P East Well Pump No. 6 East Well Transducers Call To Run DO Control Panel PLCInfluent Lift Station F East Well Pump No. 7 East Well Transducers Call To Run DO Control Panel PLCInfluent Lift Station F East Well Pump No. 8 East Well Transducers Call To Run DO Control Panel PLCInfluent Lift Station P East Well Float Switches East Well Low Low Level Shutdown DI FIELDInfluent Lift Station P East Well Float Switches High High Level Float Transfer From Transducer To Floats DI FIELDInfluent Lift Station P East Well Pump No. 5 Call To Run DI Control Panel RelaysInfluent Lift Station P East Well Pump No. 5 Auto/Manual Switch in Auto DI Control Panel SwitchInfluent Lift Station P East Well Pump No. 5 Auto/Manual Switch in Manual DI Control Panel SwitchInfluent Lift Station P East Well Pump No. 5 VFD "On" DI VFDInfluent Lift Station P East Well Pump No. 5 Common Shutdown Alarm DI VFDInfluent Lift Station P East Well Pump No. 5 VFD Speed Command AO VFDInfluent Lift Station P East Well Pump No. 5 VFD Running Speed AI VFDInfluent Lift Station P East Well Pump No. 6 Call To Run DI Control Panel RelaysInfluent Lift Station P East Well Pump No. 6 Auto/Manual Switch in Auto DI Control Panel SwitchInfluent Lift Station P East Well Pump No. 6 Auto/Manual Switch in Manual DI Control Panel SwitchInfluent Lift Station P East Well Pump No. 6 VFD "On" DI VFDInfluent Lift Station P East Well Pump No. 6 Common Shutdown Alarm DI VFDInfluent Lift Station P East Well Pump No. 6 VFD Speed Command AO VFDInfluent Lift Station P East Well Pump No. 6 VFD Running Speed AI VFDInfluent Lift Station F East Well Pump No. 7 Call To Run DI Control Panel RelaysInfluent Lift Station F East Well Pump No. 7 Auto/Manual Switch in Auto DI Control Panel SwitchInfluent Lift Station F East Well Pump No. 7 Auto/Manual Switch in Manual DI Control Panel SwitchInfluent Lift Station F East Well Pump No. 7 VFD "On" DI VFDInfluent Lift Station F East Well Pump No. 7 Common Shutdown Alarm DI VFDInfluent Lift Station F East Well Pump No. 7 VFD Speed Command AO VFDInfluent Lift Station F East Well Pump No. 7 VFD Running Speed AI VFDInfluent Lift Station F East Well Pump No. 8 Call To Run DI Control Panel RelaysInfluent Lift Station F East Well Pump No. 8 Auto/Manual Switch in Auto DI Control Panel SwitchInfluent Lift Station F East Well Pump No. 8 Auto/Manual Switch in Manual DI Control Panel SwitchInfluent Lift Station F East Well Pump No. 8 VFD "On" DI VFDInfluent Lift Station F East Well Pump No. 8 Common Shutdown Alarm DI VFDInfluent Lift Station F East Well Pump No. 8 VFD Speed Command AO VFDInfluent Lift Station F East Well Pump No. 8 VFD Running Speed AI VFD

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Clarifier No. 1 P Clarifier Control Panel Clarifier Panel Remote Alarm DI Clarifier Cont. PanelClarifier No. 1 P Clarifier Scum Pump No. 1 Wet Well Full Alarm DI Pump Control PanelClarifier No. 1 P Clarifier Scum Pump No. 1 Motor Running DI Pump Control PanelClarifier No. 1 P Clarifier Scum Pump No. 1 Scum Pump Panel Alarm DI Pump Control Panel

Clarifier No. 2 P Clarifier Control Panel Clarifier Panel Remote Alarm DI Clarifier Cont. PanelClarifier No. 2 P Clarifier Scum Pump No. 2 Wet Well Full Alarm DI Pump Control PanelClarifier No. 2 P Clarifier Scum Pump No. 2 Motor Running DI Pump Control PanelClarifier No. 2 P Clarifier Scum Pump No. 2 Scum Pump Panel Alarm DI Pump Control Panel

RAS/WAS Pump Station P Flow Transmitter No. 1 AI RAS RackRAS/WAS Pump Station P Flow Transmitter No. 2 AI RAS RackRAS/WAS Pump Station P Flow Transmitter No. 3 AI RAS RackRAS/WAS Pump Station P Flow Transmitter No. 4 AI WAS RackRAS/WAS Pump Station P RAS Pump No. 1 VFD Speed Command AO VFDRAS/WAS Pump Station P RAS Pump No. 1 VFD Running Speed AI VFDRAS/WAS Pump Station P RAS Pump No. 1 HOA Switch in Hand DI VFDRAS/WAS Pump Station P RAS Pump No. 1 HOA Switch in Auto DI VFDRAS/WAS Pump Station P RAS Pump No. 1 VFD "On" DI VFDRAS/WAS Pump Station P RAS Pump No. 1 Motor Running DI VFDRAS/WAS Pump Station P RAS Pump No. 1 Common Fail Alarm DI VFDRAS/WAS Pump Station P RAS Pump No. 1 Failure Reset DO Control PanelRAS/WAS Pump Station P RAS Pump No. 2 VFD Speed Command AO VFDRAS/WAS Pump Station P RAS Pump No. 2 VFD Running Speed AI VFDRAS/WAS Pump Station P RAS Pump No. 2 HOA Switch in Hand DI VFDRAS/WAS Pump Station P RAS Pump No. 2 HOA Switch in Auto DI VFDRAS/WAS Pump Station P RAS Pump No. 2 VFD "On" DI VFDRAS/WAS Pump Station P RAS Pump No. 2 Motor Running DI VFDRAS/WAS Pump Station P RAS Pump No. 2 Common Fail Alarm DI VFDRAS/WAS Pump Station P RAS Pump No. 2 Failure Reset DO Control PanelRAS/WAS Pump Station P RAS Pump No. 3 VFD Speed Command AO VFDRAS/WAS Pump Station P RAS Pump No. 3 VFD Running Speed AI VFDRAS/WAS Pump Station P RAS Pump No. 3 HOA Switch in Hand DI VFDRAS/WAS Pump Station P RAS Pump No. 3 HOA Switch in Auto DI VFDRAS/WAS Pump Station P RAS Pump No. 3 VFD "On" DI VFDRAS/WAS Pump Station P RAS Pump No. 3 Motor Running DI VFDRAS/WAS Pump Station P RAS Pump No. 3 Common Fail Alarm DI VFDRAS/WAS Pump Station P RAS Pump No. 3 Failure Reset DO Control PanelRAS/WAS Pump Station P WAS Pump No. 1 VFD Speed Command AO VFDRAS/WAS Pump Station P WAS Pump No. 1 VFD Running Speed AI VFDRAS/WAS Pump Station P WAS Pump No. 1 HOA Switch in Hand DI VFDRAS/WAS Pump Station P WAS Pump No. 1 HOA Switch in Auto DI VFDRAS/WAS Pump Station P WAS Pump No. 1 VFD "On" DI VFDRAS/WAS Pump Station P WAS Pump No. 1 Motor Running DI VFDRAS/WAS Pump Station P WAS Pump No. 1 Common Fail Alarm DI VFDRAS/WAS Pump Station P WAS Pump No. 1 Failure Reset DO Control Panel

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RAS/WAS Pump Station P WAS Pump No. 2 VFD Speed Command AO VFDRAS/WAS Pump Station P WAS Pump No. 2 VFD Running Speed AI VFDRAS/WAS Pump Station P WAS Pump No. 2 HOA Switch in Hand DI VFDRAS/WAS Pump Station P WAS Pump No. 2 HOA Switch in Auto DI VFDRAS/WAS Pump Station P WAS Pump No. 2 VFD "On" DI VFDRAS/WAS Pump Station P WAS Pump No. 2 Motor Running DI VFDRAS/WAS Pump Station P WAS Pump No. 2 Common Fail Alarm DI VFDRAS/WAS Pump Station P WAS Pump No. 2 Failure Reset DO Control PanelRAS/WAS Pump Station P WAS Pump No. 3 VFD Speed Command AO VFDRAS/WAS Pump Station P WAS Pump No. 3 VFD Running Speed AI VFDRAS/WAS Pump Station P WAS Pump No. 3 HOA Switch in Hand DI VFDRAS/WAS Pump Station P WAS Pump No. 3 HOA Switch in Auto DI VFDRAS/WAS Pump Station P WAS Pump No. 3 VFD "On" DI VFDRAS/WAS Pump Station P WAS Pump No. 3 Motor Running DI VFDRAS/WAS Pump Station P WAS Pump No. 3 Common Fail Alarm DI VFDRAS/WAS Pump Station P WAS Pump No. 3 Failure Reset DO Control Panel

Chlorine Building P CHLORINATOR No. 1 HOA Selector Switch in "HAND" Position DI ChlorinatorChlorine Building P CHLORINATOR No. 1 HOA Selector Switch in "AUTO" Position DI ChlorinatorChlorine Building P CHLORINATOR No. 1 Solenoid Valve Called to Open/Close D0 Control PanelChlorine Building P CHLORINATOR No. 1 Solenoid Valve Opened DI ChlorinatorChlorine Building P CHLORINATOR No. 1 Feed Rate Command AO ChlorinatorChlorine Building P CHLORINATOR No. 2 HOA Selector Switch in "HAND" Position DI ChlorinatorChlorine Building P CHLORINATOR No. 2 HOA Selector Switch in "AUTO" Position DI ChlorinatorChlorine Building P CHLORINATOR No. 2 Solenoid Valve Called to Open/Close D0 Control PanelChlorine Building P CHLORINATOR No. 2 Solenoid Valve Opened DI ChlorinatorChlorine Building P CHLORINATOR No. 2 Feed Rate Command AO ChlorinatorChlorine Building P CHLORINATOR No. 3 HOA Selector Switch in "HAND" Position DI ChlorinatorChlorine Building P CHLORINATOR No. 3 HOA Selector Switch in "AUTO" Position DI ChlorinatorChlorine Building P CHLORINATOR No. 3 Solenoid Valve Called to Open/Close D0 Control PanelChlorine Building P CHLORINATOR No. 3 Solenoid Valve Opened DI ChlorinatorChlorine Building P CHLORINATOR No. 3 Feed Rate Command AO ChlorinatorChlorine Building P TON CYLINDER SCALE No. 1 Ton Cylinder Weight AI Weight ScaleChlorine Building P TON CYLINDER SCALE No. 2 Ton Cylinder Weight AI Weight ScaleChlorine Building P CHLORINE LEAK DETECTOR Scrubber Control DI Leak Detector SystemChlorine Building P CHLORINE LEAK DETECTOR No. 1 Low Level Alarm DI Leak Detector SystemChlorine Building P CHLORINE LEAK DETECTOR No. 1 High Level Alarm DI Leak Detector SystemChlorine Building P CHLORINE LEAK DETECTOR No. 2 Low Level Alarm DI Leak Detector SystemChlorine Building P CHLORINE LEAK DETECTOR No. 2 High Level Alarm DI Leak Detector SystemChlorine Building P CHLORINE LEAK DETECTOR No. 3 Low Level Alarm DI Leak Detector SystemChlorine Building P CHLORINE LEAK DETECTOR No. 3 High Level Alarm DI Leak Detector SystemChlorine Building P CHLORINE LEAK DETECTOR No. 4 Low Level Alarm DI Leak Detector SystemChlorine Building P CHLORINE LEAK DETECTOR No. 4 High Level Alarm DI Leak Detector SystemChlorine Building P CHLORINE LEAK DETECTOR No. 5 Low Level Alarm DI Leak Detector SystemChlorine Building P CHLORINE LEAK DETECTOR No. 5 High Level Alarm DI Leak Detector System

SO2 Building P Pump Panel No. 1 HOA Selector Switch in "HAND" Position DI Pump Panel

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SO2 Building P Pump Panel No. 1 HOA Selector Switch in "AUTO" Position DI Pump PanelSO2 Building P Pump Panel No. 1 Solenoid Valve Called to Open/Close D0 Control PanelSO2 Building P Pump Panel No. 2 HOA Selector Switch in "HAND" Position DI Pump PanelSO2 Building P Pump Panel No. 2 HOA Selector Switch in "AUTO" Position DI Pump PanelSO2 Building P Pump Panel No. 2 Solenoid Valve Called to Open/Close D0 Control Panel

Chlorine Contact Basin P Dissolved Oxygen Meter No. 1 AI FIELDChlorine Contact Basin P Dissolved Oxygen Meter No. 2 AI FIELDChlorine Contact Basin P Effluent Flow Meter AI FIELDChlorine Contact Basin P NPW Pressure Transmitter AI FIELDChlorine Contact Basin P NPW Pump No. 1 VFD Speed Command AO VFDChlorine Contact Basin P NPW Pump No. 1 VFD Running Speed AI VFDChlorine Contact Basin P NPW Pump No. 1 HOA Switch in Hand DI VFDChlorine Contact Basin P NPW Pump No. 1 HOA Switch in Auto DI VFDChlorine Contact Basin P NPW Pump No. 1 VFD "On" DI VFDChlorine Contact Basin P NPW Pump No. 1 Motor Running DI VFDChlorine Contact Basin P NPW Pump No. 1 Common Fail Alarm DI VFDChlorine Contact Basin P NPW Pump No. 1 Failure Reset DO Control PanelChlorine Contact Basin P NPW Pump No. 2 VFD Speed Command AO VFDChlorine Contact Basin P NPW Pump No. 2 VFD Running Speed AI VFDChlorine Contact Basin P NPW Pump No. 2 HOA Switch in Hand DI VFDChlorine Contact Basin P NPW Pump No. 2 HOA Switch in Auto DI VFDChlorine Contact Basin P NPW Pump No. 2 VFD "On" DI VFDChlorine Contact Basin P NPW Pump No. 2 Motor Running DI VFDChlorine Contact Basin P NPW Pump No. 2 Common Fail Alarm DI VFDChlorine Contact Basin P NPW Pump No. 2 Failure Reset DO Control PanelChlorine Contact Basin F NPW Pump No. 3 VFD Speed Command AO VFDChlorine Contact Basin F NPW Pump No. 3 VFD Running Speed AI VFDChlorine Contact Basin F NPW Pump No. 3 HOA Switch in Hand DI VFDChlorine Contact Basin F NPW Pump No. 3 HOA Switch in Auto DI VFDChlorine Contact Basin F NPW Pump No. 3 VFD "On" DI VFDChlorine Contact Basin F NPW Pump No. 3 Motor Running DI VFDChlorine Contact Basin F NPW Pump No. 3 Common Fail Alarm DI VFDChlorine Contact Basin F NPW Pump No. 3 Failure Reset DO Control Panel

09-19-2014 Addendum 7 of 44

CITY OF LAREDO SOMBRERETILLO WASTEWATER TREATMENT PLANT ...

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