Att-18-SBIWTP_SOO_V2_06192018.pdf

Sequence of Operations for the South Bay International Wastewater Treatment Plant

San Ysidro, CA.

i

Table of Content Influent Flow

Introduction and Purpose:

Safety Precaution:

Procedure:

Headworks

Unit Equipment:

Influent Pumps

Exercise & Rotations Purpose:

Safety:

Alerts:

Procedure:

Slide Gates

Start-Up Procedure:

Automatically - Portable Hydraulic Operator

Manually - Square Nut Operator

Headworks Odor Control

Introduction and Purpose:

Trigger:

Required Safety Equipment:

Start-up Procedure:

Start-up the exhaust fans:

Start-up the water softener:

Start-up the odor scrubber:

Start-up the recirculation pumps:

Start-up the pH and ORP controllers:

Start-up the sodium hypochlorite (NaOCL) system:

Start-up the sodium hydroxide (NaOH) system:

Sump pumps:

Tower Packing Inspection & Clean Up:

Safety Precautions:

Required Equipment:

ii

Procedure:

Routine operations:

Introduction and Purpose:

Influent Pump Facilities Start Up Procedure: . Error! Bookmark not defined.

Automatic Mode of Operation

Manual Mode of Operation

Bar Screens

Screening Equipment

Automatic Mode of Operation

Manual Mode of Operation

Automatic Mode of Operation

Manual Mode of Operation

Headworks Start-Up

Introduction and Purpose:

Procedure:

Headworks Shutdown Procedure

Slide Gates

Automatically - Portable Hydraulic Operator

Manually - Square Nut Operator

Screening Equipment

Influent Pump Station

Grit Removal

Grit Handling Equipment Start-Up

Grit Chamber Blowers

Automatic Mode of Operation

Manual Mode of Operation

Grit Pumps

Automatic Mode of Operation

Manual Mode of Operation

Grit Classifier/Separators

Grit/Screenings Storage Bin Winches

Grit Handling Equipment Shut Down

Grit Chamber Blowers iii

Grit Pumps

Grit Classifiers/Separators

Grit/Screenings Storage Bin Winches

Headworks Odor Control

Shutdown Procedure:

Shutdown of the sodium hydroxide (NaOH) system:

Shutdown of the sodium hypochlorite (NaOCL) system:

Shutdown of the pH and ORP controllers:

Shutdown of the recirculation pumps:

Shutdown of the exhaust fans:

Shutdown of the water softener

NPW

Primary Sedimentation

Shut-Down

Ferric Chloride

Primary Sedimentation Tanks

Solids Processing

Dewatering System Pumping Facilities

BFP Sludge Feed Pumps

Sludge Grinder

Belt Filter Presses

Individual Equipment Shutdown Procedures

Dewatering System Pumping Facilities

BFP Sludge Feed Pumps

Sludge Grinder

Dewatering System Polymer Conditioning Facilities

Polymer Bulk Storage Tank

Polymer Transfer Pumps

Polymer Mixing Tanks

Polymer Feed Pumps

Solids Processing Polymer Storage Area Sump Pump

Belt Filter Presses

Semi-Automatic Mode of Operation iv

Manual Mode of Operation

USST

USST Odor Control

Skimming Wet Well........................................ Error! Bookmark not defined.

Standby Generator

Power Outage Equipment Reset

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Introduction The South Bay International Water Treatment Plant (SBIWTP) is a secondary waste water treatment plant, with 25 million gallons per day capacity located in the south of San Diego County, California, two miles west of the San Ysidro Port of Entry. In this plant, sewage originating in Tijuana, Mexico is treated; the liquid wastes resulting from the process are discharged into the Pacific Ocean, whereas the biosolids are loaded on trucks and sent back to Mexico. In the future a secondary treatment system will be in application to recycle and purify waste water even further, so it is eligible for irrigation use.

The plant was designed and built under the International Boundary and Water Commission (IBWC) to reduce and prevent the contamination of the Tijuana River in the U.S as a result sewage waste from Tijuana. The SBIWTP was built on a 75-acre site, on the northern side of the border immediately to the north of Tijuana’s main wastewater pumping station, to cover an average 25 mgd of sewage in excess to Tijuana’s system capability. The plant can cover up to a total capacity of 100 mgd.

This document covers the Sequence of Operation (SOO) in place to run and maintain the plant, and its relevance to the SCADA system.

Influent Flow

Introduction and Purpose:

Junction Box 1 (JB-1) is located outside of Gate 2 at the S/E corner of the South Bay International Wastewater Treatment Plant (SBIWTP). A key is required to access the fenced-in facility in order to access to the Motor Operated Valve (MOV) that allows wastewater flow to enter the plant via a 72-inch influent line.

This MOV is operated with a Limit torque actuator to open and close the gate valve. This gate valve is operated partially open, to regulate the metered influent flow. The outlet gate valve is a 96-inch valve which, under normal operation, is fully open.

Safety Precaution:

The JB-1 channel is defined as a Permitted Confined Space. No entry shall be allowed, unless all requirements as defined by OSHA have been satisfied. In addition to the concern of atmospheric conditions, engulfment and drowning are major concerns. Because of its depth and line size of 96 inches, it could be very easy for one to become engulfed and drown in this large, high flow and velocity pipeline.

Therefore, if it is required that you must open the access hatches, fall protection shall be implemented. Another area of concern is the location of JB-1, being located adjacent to the U.S/Mexican Border fence. If you have any concerns

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Procedure:

1. Always let someone know if you are going out to JB-1. If you see suspicious activity in the area, leave immediately and return to the plant.

Let your Supervisor know and call for assistance if needed.

2. To regulate the influent flow, the gate will usually be open between 6 to 10 inches, depending on variables. The metered flow can be observed on the SCADA screen.

i) To increase flow, open the JB-1 using the MOV. Push the “Open” button. When the valve has reached your desired position, push the “Stop” button. The valve will not stop on its own. Verify that the valve stopped opening.

ii) To decrease flow, push the “Close” button until the desired opening is established. Push the “Stop” button and ensure that the valve has stopped closing.

iii) Make small moves, ½ to 2 inches, and monitor the flow changes on SCADA. Give the flow time to stabilize and do not make too many adjustments in a short period of time.

3. If no electrical power is available to operate the Limitorque, engage the lever and operate the valve manually using the hand wheel.

4. As a preventative maintenance task, we should stroke the JB-1 valve at least once a week. To do this, implement the following:

i) Note the current setting of the valve stem in inches. (This task should be performed on Day Shift; Monday thru Friday, while Operations and Maintenance support is available.)

ii) Press the “Open” button and allow the valve to open to the 24-inch mark.

iii) Press the “Stop” button. Allow this valve setting to remain for 5 minutes.

iv) Press the “Close” button, and once the valve reaches its original setting, press the “Stop” button.

v) Make sure that the valve has ceased moving and that the gate is secured prior to leaving the JB-1 location.

Keep in mind while performing this task that you must monitor the plant Influent Wet Well. Do not allow the plant to enter into an upset condition due to this exercise. If required, shorten the duration of the aforementioned task. If unsure, check with your Supervisor.

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Headworks

Unit Equipment:

Slide Gates

Start-Up Procedure:

1. Open the selected slide gate and the selected slide gate for scum removal according to the procedures listed below:

a. Select the gate that will be opened.

b. Open the gate as follows:

Automatically - Portable Hydraulic Operator

Since the portable hydraulic operator is not used continuously, the operator must be inspected before each use. Perform a brief examination of the unit, checking the following items:

a. Proper hydraulic oil level. If low, fill as directed in manufacturer’s O&M Manual.

b. Unusual wear or damage to components.

c. Fluid leakage.

d. Clean out covers, filler caps and breather caps on reservoir are properly fastened.

e. All filtration devices are in place

f. The unit should be clean and free from material buildups that may result in over heating and/or damage.

g. Energize the operator by inserting plug in receptacle and starting motor.

h. Position remote drive unit (RDU) over the gate operator drive shaft.

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i. Verify the gate position and direction of the necessary gate movement.

j. Activate the directional control valve. Observe carefully the gate head movement and operator to detect irregular movement. If this occurs, then release directional control valve to avoid damage.

k. Deactivate RDU when gate is within 2-inches of its desired position.

l. Use manual operator to move gate into its final position.

Manually - Square Nut Operator

a. Position the t-handle over the operator nut; make certain the nut is fully-recessed into the socket.

b. Rotate the operator clockwise to open the gate.

c. Visually inspect the gate head to verify proper position.

Bar Screens

Screening Equipment

Start the influent mechanical bar screening equipment according to the procedures listed below:

1. Select the screenings conveyor(s) that will be in service.

2. Place the respective ROT switch for conveyor in the “Remote” position.

3. Place the screenings conveyor(s) into operation as follows:

Automatic Mode of Operation

a. Place the respective HOA switch at the LCP-HWE for conveyor in the “Auto” position.

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b. In the “Auto” mode, the mechanical bar screen operates as called for by signals from PLC-HWE

Manual Mode of Operation

a. Place the respective HOA switch of the LCP-HWE for conveyor in the “Hand” position.

4. Visually verify the conveyor system is operating.

5. Select the mechanical screen(s) that will be in service.

6. Place the FOR switch for the selected mechanical screens in the “Forward” position.

7. Ensure the LOS switch for the screen(s) is in the “On” position.

8. Place the mechanical bar screen(s) into operation as follows:

Automatic Mode of Operation

a. Place the HOA switch at the LCP-HWE for the selected mechanical bar screen(s) in the “Auto” position.

b. In the “Auto” mode, the conveyor operates as called for by signals from

PLC-HWE.

Manual Mode of Operation

a. Place the respective HOA switch at the LCP-HWE for the selected mechanical bar screen(s) in the “Hand” position.

10. Open the isolation slide gates to the appropriate screening channels as required by your Operations Supervisor. NOTE: If the channel for the screen to be started has been dewatered, the isolation slide gates should be opened to fill the channel before starting the screen.

11. Monitor the water level differential of the upstream and downstream channel of the screens at the headworks bubbler level system. Your Operations Supervisor should establish the water level.

12. Visually monitor the operation of the mechanical screens to ensure that debris is being removed from the bar rack by the steel rake assembly.

13. Test rake wiper assembly.

14. Check limit switches for proper alignment when in contact with rake.

15. Run rake until it engages in bar section at bottom.

16. Run rake into bar section and check engagement of teeth into bars as it travels to top of bar section. Adjust if required.

17. Check contact of rake wiper with rake and adjust if required.

18. Run rake to home position (up position switch) to make sure it functions properly.

19. Run rake in local for an entire cycle.

20. Initiate start and stop of rake from timer.

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21. The manually cleaned bar screens are used during periods of maintenance or repair of the mechanical bar screens. Cleaning the manually cleaned bar screen is accomplished with a rake with tines (prongs) which fit between the bars.

Influent Pumps

Exercise & Rotations Purpose:

1. To prevent accumulations of sand and grit in the wet well.

2. To inspect operation and vibration.

3. To increase pump reliability.

Safety:

Communicate with staff and make certain that no one is working on the Influent Pumps before completing this procedure. Make sure someone monitors the pump’s operation at Headworks to make sure there are no breaks, leaks or excessive vibrating.

Alerts:

Communicate with the Instrumentation Technician and Electrician to make sure that they are standing by in case there are any problems during the process of this procedure. If there are any problems, communicate this with Maintenance and notify your immediate Supervisor.

Procedure:

1. Proceed to a SCADA system computer.

2. Keep a close watch on the wet well at all times during this task.

3. Pull up the “Influent Pump Station” screen.

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4. Verify which pumps are in operation. Normally, the pumps are in the following sequence due to operational efficiency:

a. LEAD = IP #6

b. LAG 1 = IP #1

c. LAG 2 = IP #3

d. LAG 3 = IP #5

e. LAG 4 = IP #2

f. LAG 5 = IP #4

5. Exercise and inspect each pump for a minimum of five (5) minutes.

6. Pumps can be run by changing the above LEAD/LAG sequences, by placing the pumps in Manual via SCADA, or by placing them in Hand in the Headworks MCC.

a. To place pumps in Manual via SCADA

i. Click on the Influent Pump’s icons on the SCADA screen.

ii. Underneath each column, refer to the area labeled “Controls”.

1. Under normal operations, the “SCADA AUTO” box should be highlighted green.

2. Click on the “SCADA MANUAL” box: this box should turn red once activated.

3. Then start the Influent Pump by clicking the “START” button: allow the pump to run for about five minutes.

4. Once the five minutes have passed, then click the “STOP” button and make sure that the pump stops completely.

5. Once the pump has stopped, return the pump to automatic operation by clicking the “SCADA AUTO” box; the green highlight should return to this box when the system is back in auto.

7. Once each pump has been exercised and inspected, verify that all pumps are returned to automatic and in the correct sequence.

8. Verify all pumps are operating properly and wet well level is stable.

Startup Procedure:

1. Select the influent pump(s) that will be in service.

2. Verify the influent pump(s) pipe valving is in the proper orientation and selected pump discharge and suction valves are open.

3. Ensure that seal water is being supplied to the pump(s).

4. Place the respective ROT switch in the “Remote” position.

5. Place the influent pump(s) into operation as follows:

Automatic Mode of Operation

a. Place the respective HOA switch at the LCP-IPS in the “Auto” position.

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b. Under normal conditions the selected pump will start after a 0 to 180 second delay and operate continuously.

Manual Mode of Operation

a. Place the respective HOA switch at the LCP-IPS in the “Hand” position.

b. After a 0 to 180 second delay the pump motor starts and pump will operate continuously.

6. Visually verify the pump is operating.

7. Check driver lubrication levels and flow.

Headworks Odor Control

Introduction and Purpose:

In order to meet air quality standards, Veolia operates odor control units within the wastewater treatment plant. This standard operating procedure is a guide for the start-up, routine operation, and shutdown of the Odor Reduction Station system located at the Headworks.

Trigger:

On a monthly basis operators will perform Odor Control Scrubber cleaning utilizing muriatic (hydrochloric) acid. Refer to the Document titled “Odor Control Scrubber Cleaning Utilizing Muriatic (Hydrochloric) Acid” for performing this task; this Document can be found under the General Operations SOP Manual: #24.

Required Safety Equipment:

Wear Veolia uniform, steel toed safety boots, safety glasses, and latex gloves when performing duties associated with Odor Reduction Stations. Refer to the “Safety” section within this Operator procedure for proper PPE to enter containment basins, and for Odor Control Scrubber cleaning.

Start-up Procedure:

Start-up the exhaust fans:

1) Select the odor reduction fan that will be placed in service.

2) Verify that the odor reduction duct is in the proper orientation and that the selected fan inlet and discharge dampeners are open.

3) Place the respective remote-off-test (ROT) switch in the “Remote” position.

4) Place the fan in an automatic or manual mode of operation as follows.

a) Automatic mode of operation:

i) Place the Hand/Off/Auto (HOA) switch at the Local Control Panel

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(LCP) in the “Auto” position.

ii) In the automatic mode, the fan operates as called for by signals from the

Programmable Logic Control (PLC). Under normal conditions, the selected fan will start and operate continuously.

b) Manual Mode of Operation:

i) Place the HOA switch at the LCP in the “Hand” position.

ii) The pump motor starts and the fan will operate continuously.

5) Visually verify the fan is operating.

Start-up the water softener:

1) Ensure that the local electrical disconnect is positioned to energize the water softening systems controls.

2) Open the appropriate isolation valves to the inlet and outlet of the water softening system.

3) Close the bypass valve.

4) Adjust the flow of softened water to the scrubber tower to meet the desired flow rate.

5) Observe the calcium analyzer indicator (reading should be below 8 ppm).

Start-up the odor scrubber:

1) Ensure that the drain and sample valves are closed.

2) Open the appropriate isolation valves including the sodium hypochlorite feed line, sodium hydroxide feed line, and the sump make-up water line.

3) Ensure that the sump level is at three feet (3ft.).

Start-up the recirculation pumps:

1) Select the recirculation pump that will be placed in service.

2) Verify that the recirculation pipe valving is in the proper orientation and that the selected pump suction and discharge valves are open.

3) Ensure that the upstream needle valves and downstream ball valves which isolate the pH and ORP controllers from the recirculation pump suction and discharge piping are closed. (Excessive pressure can damage the probes).

4) Ensure that the seal water is being supplied to the pump seal.

5) Place the respective ROT switch in the “Remote” position.

6) Place the pump into operation as follows:

a) Automatic Mode of Operation

i) Place the HOA switch at the LCP in the “Auto” position.

ii) In the automatic mode, the pump operates as called for by the signal from the PLC. Under normal conditions, the selected pump will start and operate continuously.

b) Manual Mode of Operation

i) Place the HOA switch at the LCP in the “Hand” position.

ii) The pump motor starts and operate continuously.

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7) Visually verify that the pump is operating.

8) Verify that the isolation valves on the inlet and outlet of the metering tube associated with the flow meter are open and that the valve in the meter bypass line is closed.

9) Observe the flow meter reading (flow rate should be 230GPM or greater).

Start-up the pH and ORP controllers:

1) Open the upstream and downstream ball valves which isolate the pH and ORP inlet header (by-pass line) from the recirculation pump suction and discharge piping.

2) Open the respective downstream ball valves which isolate the pH and ORP probes from the common outlet headers.

3) Ensure that the ORP analyzer is energized and displaying a millivolt reading.

4) Ensure that the pH analyzer is energized and displaying a reading.

5) Verify that the pH setpoint is set to achieve the desired value (between 9.0 and

11.0) per air permit requirements. Adjust if needed.

Start-up the sodium hypochlorite (NaOCL) system:

1) Ensure that there is sufficient sodium hypochlorite in the storage tank.

2) Open the appropriate isolation valves on the outlet lines.

3) Select the NaOCL metering pump that will be placed into service.

4) Verify that the NaOCL metering pump valving is in the proper orientation and that the pump suction and discharge vales are open.

5) Place the respective ROT switch in the “Remote” position.

6) Place the pump into operation as follows:

a) Automatic Mode of Operation

i) Place the HOA switch at the LCP in the “Auto” position.

ii) In the automatic mode, the pump operates as called for by the PLC.

Under normal conditions the selected pump will start and operate continuously.

b) Manual Mode of Operation

i) Place the HOA switch at the LCP in the “Hand” position.

ii) The pump motor starts and will operate continuously.

7) Visually verify that the pump is operating.

8) Observe the discharge pressure of the pump (discharge pressure should be approximately 40psi).

9) Manually adjust the electronic speed control on the metering pump to achieve the desired ORP millivolt reading at the ORP transmitter (between 575mV and 725mV) per air permit requirements.

Start-up the sodium hydroxide (NaOH) system:

1) Ensure there is sufficient NaOH in the tank.

2) Open the appropriate isolation valves on the outlet lines.

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3) Select the NaOH metering pump that will be placed into service.

4) Verify that the NaOH metering pump valving is in the proper orientation and the selected pump suction and discharge valves are open.

5) Place pump into operation as follows:

a) Automatic Mode of Operation

i) Place the HOA switch at the LCP in the “Auto” position.

ii) In the Automatic mode, the pump operates as called for by the PLC.

Under normal conditions, the selected pump will start and operate continuously with the pump stroke being automatically adjusted by the signal from the pH analyzer.

6) Manual Mode of Operation

i) Place the HOA switch at the LCP in the “Hand” position.

ii) The pump motor starts and the pump will operate continuously.

7) Visually verify that the pump is operating.

8) Observe the discharge pressure of the pump (discharge pressure should be approximately 40psi).

Sump pumps:

1) Inspect the sump for debris.

2) Make sure that the discharge valves are open.

3) Verify that the level control floats are not tangled up.

4) Place the control power switch to the “On” position.

5) With liquid in the sump, press the “Start” button.

6) Make sure that the pumps are pumping and that the pumps shut off at the low level float.

Tower Packing Inspection & Clean Up:

The tower packing and mist eliminator should be inspected regularly for signs of fouling and plugging. Fouling occurs primarily from precipitation of sulfur compounds (excludes ORSC4, which utilizes sulfuric acid). Additional fouling can occur from the collection of iron, carbonate and bacterial deposits. Cleaning can be accomplished with a specialized de-fouling chemical, sulfuric acid or muriatic acid. This Document describes the use of muriatic acid.

Safety Precautions:

1. The scrubbers contain high concentrations of caustic and sodium hypochlorite that are potentially hazardous. They will react with the muriatic acid generating heat and gases.

2. No less than two operators are to be present during project setup and take-down.

3. Wear appropriate PPE, including rubber gloves and eye protection when connecting or disconnecting acid containing fittings.

4. Keep all hoses and cords out of the way to prevent trip hazards.

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5. Always keep a water hose nearby in the event of a spill.

6. When removing the window from the scrubber for cleaning, do not over tighten the bolts when reinstalling. Set the cordless drill chuck to the #14 setting. Complete the torquing sequence by hand, and make sure not to damage the window by over-torquing.

7. Read and understand the MSDS for muriatic acid.

8. Never pour acid from one carboy to another. Use the pump to empty the carboy.

Required Equipment:

1. Muriatic acid in 15-gallon carboys

2. Odor control tower cleaning kit

3. 12” crescent wrench

4. 9/16” combo wrench

5. Manometer

6. 15/16” socket; ½” drive rachet

7. Portable pH meter

8. Clipboard with Acid Washing check list

9. 1-gal of muriatic acid (for cleaning probes)

Procedure:

1. Take manometer reading; open sample ports on the exhaust fan and the top of the tower (above media). Drain out all water (if water will not cease, abort the manometer reading, and note it). Record the manometer reading.

2. Turn on the manometer in the In/wc mode. Set to zero until the “+” bar displays.

3. Connect the manometer to the sample ports and open the valves simultaneously. Take an average reading and record it.

4. Close both sample valves and disconnect the manometer.

5. Record which scrubber is to be washed on the check list and note the start time.

6. Remove the sump drain extension pipe and open the drain valve

7. Turn off the scrubber fan, chemical feed pumps and the scrubber recirculation pump.

8. Setup the white sump with the yellow sump inside. Fill yellow sump ¾ with water.

9. Connect the suction hose to the metering pump, being careful not to lose the retaining ring (inspect the ends of the hose for damage and repair if needed). Tighten the retaining nut tightly.

10. Place the metering pump on top of the yellow sump and place the suction hose into the sump of water to prime the pump.

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11. Connect the discharge hose from the acid pump to the scrubber and tie-off hose with tie strings to prevent hose damage. Open the acid injection valve on the scrubber.

12. Setup the equipment for the recovery system.

13. Install the fixed fitting for the sump pump discharge to the blind flange on the northeast side of the scrubber. Install the hose adapter flange to the scrubber and tighten the bolts.

14. Connect the discharge hose to the adapter, minimizing any tripping hazards. Remove “U” tubes from the fan discharge and ensuring that the valves are left in the open position. Install the drain extensions on one of the drains. Place the green sump under the drain valves to recover all drainage. Place the automatic sump pump into the sump. Connect the discharge hose and tie it off as well as the sump pump.

15. Arrange the sump pump cord to prevent it from interfering with the float switch and ensure that there are no tripping hazards.

16. The recovery system is now complete.

17. Drain the scrubber sump.

18. Fill the sump with fresh water; flush and rinse until clear.

19. Close the drain valve from the scrubber sump and cap it.

20. Inject the muriatic acid into the scrubber tower at a 50-50 setting. Fill the sump to the bottom of the window. Open the upper diffuser valve.

21. Turn off the make-up water when the level is at the bottom of the window (fill SP Tower #5 to 1.6 ft).

22. Install the cap for the vent on the drain.

23. Set the metering pump to 15 – 15.

24. Prime both recirculation pumps.

25. Start one pump, and rotate pumps every 4-hours.

26. Record readings for pH and sump level every hour (this can be done at

SCADA). If the pH begins to rise, then check/replace the carboy.

27. Run the scrubber for about 24 hours.

28. After 24 hrs, flush the metering pumps with water for 30-minutes at max stroke/speed.

29. Disconnect all of the equipment and put it away.

30. Drain the sump.

31. Refill the sump. Re-prime the recirculation pumps. Run one pump at a time for ~10 minutes each to rinse out the pumps/media.

32. Drain the sump.

33. Rinse the sump until clear. Close the drain valve.

34. Close the upper diffuser valve

35. Refill the sump with make-up water (MUW) and caustic with one caustic pump running.

36. Check the sump level in ~20 minutes.

37. Prime the recirculation pumps when the sump is at its operating level.

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38. Return the scrubber back into operation by following the appropriate start-up instructions.

39. Adjust the pH and ORP.

40. Complete the Scrubber Washing PM by taking a manometer reading the following day and record the results.

Routine operations:

1) Monitoring and recording of (ORP 575mV or greater) per air permit requirements.

2) Monitoring and recording of pH (9.0 or greater) per air permit requirements.

3) Monitoring, adjusting, and recording of make-up water (MUW) to be greater than 5GPM.

4) Monitoring and recording of recirculation flow (230GPM or greater).

5) Record the above listed items in the Air Quality Readings log and initial.

Recordings will be validated by another operator and initialed.

6) Failures and/or alarms experienced in this process include:

a) ORP Low = 600

b) ORP High = 900

c) pH Low = 9.2

d) pH High = 9.6

e) Odor Reduction Exhaust Fan (OREF) failures

f) Recirculation pump seal water failure, motor failure, and/or low flow (less than 230GPM).

g) High sump pump alarms (typically in dry weather this is a false alarm).

Routine monthly maintenance for the operations department includes:

1) “Odor Control Scrubber Cleaning Utilizing Muriatic (Hydrochloric) Acid”:

Please refer to the Document with the above title for specific guidelines on this procedure.

Headworks Startup

The following is a standard operating procedure for the start-up and shut-down of the Headworks for the South Bay International Wastewater Treatment Plant.

Procedure:

The Headworks Facilities should be started according to the following procedures:

1. Ensure that the inlet and junction structures, barscreen channels and grit chamber are free of accumulated grease, rags and other debris.

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2. Visually inspect all equipment for any signs of damage or improper installation.

3. Verify the grit/screenings storage bins are positioned properly.

4. Inspect the entire length of the screenings conveyor belt for debris and clean surface of debris if needed.

5. Ensure that the screenings conveyor emergency taglines are set and have not been pulled. If they have been pulled, reset the tagline switches.

6. Select the bar screen(s), grit chamber blower, and the grit pump(s) that will be in service.

7. Ensure the Control Panels LCP-HWE located at the HWE-LCC-EAST and

LCP-ORHW at the Headworks Odor Reduction Station, and Distribution Panels DPP4, DPC4, DPL4, DPM4, located at the HWE-LCC-EAST are energized.

8. Ensure that the circuit breakers at Motor Control Centers MCC-HWE in HWE- LCC-EAST and at MCC-PSTE “A” BUS and MCC-PSTE “B” BUS in the PST-LCC-EAST are energized for all equipment to be operated.

9. Energize the SG-HWE in the HWE-LCC-EAST.

Start Headworks Odor Reduction Station according to the procedures descriptions, in the following order:

a. Screening and Wetwell Areas Exhaust Fan and Automatic Damper

b. Storage Bin/Grit Dewatering Areas Air Supply and Exhaust Fans

c. Scrubber Exhaust Fan

d. Water Softening System

e. Scrubber

f. Recirculation Pumps

g. pH and ORP Controllers

h. NaOC1 Storage Tank

i. NaOC1 Metering Pump

j. NaOH Storage Tank

k. NaOH Metering Pump

10. After normal operation of the Odor Reduction Station is established, start to feed the influent flow to the Screening Area by opening Junction Box No. 1 sluice gate.

11. The pH and ORP of the odor control scrubber should be continuously monitored. The optimum set points (pH, ORP) should be in accordance with the Odor Reduction Station Air Permit and your Operations Supervisor’s direction based on operating experience.Start the screenings conveyor(s) that will be in service according to the procedures described in Section screenings conveyor

12. Open the isolation slide gates to the appropriate screening channels as required by your Operations Supervisor.

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13. Start the respective bar screen(s) that will be in service according to the procedures described in Section Bar Screen.

14. Start the grit handling equipment according to the procedures described in Grit handling.

15. Start the influent pump station according to the procedures described in Pump station.

Headworks Shutdown Procedure

Slide Gates

Close the selected slide gate and the selected slide gate for scum removal according to the procedures listed below:

1. Select the gate that will be closed.

2. Close the gate as follows:

Automatically - Portable Hydraulic Operator

a. Since the portable hydraulic operator is not used continuously, the operator must be inspected before each use. Perform a brief examination of the unit, checking the following items:

Proper hydraulic oil level. If low, fill as directed in manufacturer’s O&M Manual.

Unusual wear or damage to components.

Fluid leakage.

Clean out covers, filler caps and breather caps on reservoir are properly fastened.

All filtration devices are in place.

The unit should be clean and free from material buildups that may result in over heating and/or damage.

b. Energize the operator by inserting plug in receptacle and starting motor.

c. Position remote drive unit (RDU) over the gate operator drive shaft.

d. Verify the gate position and direction of the necessary gate movement.

e. Activate the directional control valve. Observe carefully the gate head movement and operator to detect irregular movement. Should this occur, release directional control valve to avoid damage.

f. Deactivate RDU when gate is within 2-inches of its desired position.

g. Use manual operator to move gate into its final position.

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Manually - Square Nut Operator

a. Position the t-handle over the operator nut, make certain the nut is fully-recessed into the socket.

b. Rotate the operator counter-clockwise to close the gate.

3. Visually inspect the gate head to verify proper position.

Screening Equipment

Shut down the mechanical screening equipment according to the procedures listed below:

1. Close isolation slide gates upstream of the screening equipment.

2. Turn the respective FOR switch to the “Off” position when the screen has reached the “End of Travel” position.

3. Continue to operate the screenings conveyor(s) to transfer debris to the storage bin area.

4. When debris transfer to the storage bin area is complete, turn the ROT switch for the respective conveyor to the “Off” position.

5. After water level in screenings channel has reached the low level setting, close the respective isolation slide gate downstream of the screening equipment.

6. Use a non-potable water eductor to dewater screenings channel, which has been isolated at either end.

Note: The screens also automatically shut down on high torque, motor overload, and drive temperature high conditions or as called for by signals from PLC-HWE

Influent Pump Station

Shut down the influent pump station according to the procedures listed below:

1. Turn the respective HOA switch at the LCP-IPS for the pumps to be shut down to the “Off” position.

2. Verify the pump is stopped.

3. Lock the appropriate ROT switch.

4. If the pump is to be out of service for an extended period of time, disconnect power source.

5. If either half of the pump station is to be out of service for an extended period of time, close the appropriate isolation stop plates and slide gates in the pump station wetwell and IPS influent channel.

Note: The influent pumps will also shut down on pump failure, seal water failure, and IPS wetwell low level.

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Headworks Odor Control

Shutdown Procedure:

Shutdown of the sodium hydroxide (NaOH) system:

1) Select the pump that is in service.

2) Take the pump out of operation as follows:

a) Automatic Mode of Operation

i) Place the HOA switch in the “Off” from the “Auto” position.

ii) In the automatic mode, the pump operates as called for by the PLC.

Under normal conditions, the pump will shut off when placed in the “Off” position.

b) Manual Mode of Operation

i) Place the HOA switch in the “Off” from the “Hand” position.

3) Close the appropriate isolation valves on the outlet lines.

4) If taking this system offline for service and/or maintenance follow the lock-out

/ tag-out procedure under Volume 1 General Procedures SOP #13.

Shutdown of the sodium hypochlorite (NaOCL) system:

1) Select the pump that is in service.

2) Take the pump out of operation as follows:

a) Automatic Mode of Operation

i) Place the HOA switch in the “Off” from the “Auto” position.

ii) In the automatic mode, the pump operates as called for by the PLC.

Under normal conditions, the pump will shut off when placed in the “Off” position.

b) Manual Mode of Operation

i) Place the HOA switch in the “Off” from the “Hand” position.

3) Close the appropriate isolation valves on the outlet lines.

4) If taking this system offline for service and/or maintenance follow the lock out

/ tag out procedure under Volume 1 General Procedures SOP# 13.

Shutdown of the pH and ORP controllers:

1) Isolate the pH and ORP controllers by closing the respective upstream and downstream ball valves; this isolates the pH and ORP meters from receiving flow from the recirculation pumps.

2) If taking controllers offline for service and/or maintenance follow the lock-out / tag-out procedure under Volume 1 General Procedures SOP #13.

Shutdown of the recirculation pumps:

1) Select the pump that is in service.

2) Take the pump out of operation as follows:

a) Automatic Mode of Operation

i) Place the HOA switch in the “Off” from the “Auto” position.

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ii) In the automatic mode, the pump operates as called for by the PLC.

Under normal conditions, the pump will shut off when placed in the “Off” position.

b) Manual Mode of Operation

i) Place the HOA switch in the “Off” from the “Hand” position.

3) Close the appropriate isolation valves on the outlet lines.

4) If taking these pumps offline for service and/or maintenance follow the lock out / tag out procedure under Volume 1 General Procedures SOP# 13.

Shutdown of the exhaust fans:

1) Select the exhaust fan that is in service.

2) Take the exhaust fan out of operation as follows:

a) Automatic Mode of Operation

i) Place the HOA switch in the “Off” from the “Auto” position.

ii) In the automatic mode, the Exhaust Fan operates as called for by the

LCP. Under normal conditions, the exhaust fan will shut off when placed in the “Off” position.

b) Manual Mode of Operation

i) Place the HOA switch in the “Off” from the “Hand” position.

3) If taking offline for service and/or maintenance follow the lock out / tag out procedure under Volume 1 General Procedures SOP #13.

Shutdown of the water softener

1) Open the bypass valve.

2) Close the appropriate isolation valves to the inlet and outlet of the water softening system.

Grit Removal

Grit Handling Equipment Start-Up

Grit Chamber Blowers

Start the grit chamber blowers according to the following procedures listed below:

1. Select the blower that will be in service. One blower should be normally in service and one in standby mode.

2. Verify that the blower pipe valving is in the proper orientation and the selected blower pressure relief valve is operating.

3. Place the respective ROT switch in the “Remote” position.

4. Place the grit chamber blower into operation as follows:

Automatic Mode of Operation

a. Place the respective HOA switch at the LCP-GB in the “Auto” position.

Manual Mode of Operation

a. Place the respective HOA switch at the LCP-GB in the “Hand” position.

5. Visually verify blower is operating and that the discharge pressure does not continue to rise above the design point.

Grit Pumps

Start the grit pumps according to the procedures listed below:

1. Select the grit pump(s) that will be in service.

2. Verify the grit pump pipe valving is in the proper orientation and selected pump discharge and suction valves are open.

3. Ensure that seal water is being supplied to the pump(s).

4. Place the respective ROT switch in the “Remote” position.

5. Place grit pump(s) into operation as follows:

Automatic Mode of Operation

a. Place the respective HOA switch at the LCP-GP in the “Auto” position.

b. In the “Auto” mode, the grit pump will operate as called for by signals from

PLC-HWE

Manual Mode of Operation

a. Place the respective HOA switch at the LCP-GP in the “Hand” position.

b. After a 0 to 180 second delay the pump motor starts and pump will operate continuously.

5. Visually verify the pump is operating.

Grit Classifier/Separators

Start the grit classifier/separator according to the procedures listed below:

1. Select the grit classifier/separator(s) that will be in service. The cyclone degritting unit starts when the grit pumps are called to start and will run for an adjustable off-delay period after the grit pumps have stopped.

2. Verify the grit classifier/separator pipe valving is in the proper location.

3. Ensure that the classifier is bedded with clean sand. If not, then fill the tank with water and then with the unit running, load the tank with sand in the pool area until sand is discharged by the conveyor at the upper end of the classifier.

4. Place the respective ROT switch in the “Remote” position.

5. Place the appropriate On/Off switch at the LCP-GC in the “On” position to start the selected grit classifier/separator.

6. Visually verify the grit classifier/separator is operating.

Grit/Screenings Storage Bin Winches

Start the grit/screenings bin winches according to the procedures listed below:

1. Inspect the winch and other equipment. Make sure to check lubrication before use.

2. Make sure the load is free to move and will not tip or in any way move uncontrollably.

3. Turn electric power on by using the local disconnect switch.

4. Operate the winches as required by your Operation Supervisor by using the respective Forward/Off/Reverse switches located at the north wall of the Grit/Screenings Storage Area.

Grit Handling Equipment Shut Down

Grit Chamber Blowers

Shut down the grit chamber blowers according to the procedures listed below:

1. Turn the respective HOA switch at the LCP-GB at the PST-LCC-EAST for the blower to be shut down to the “Off” position.

2. Verify the blower is stopped.

3. Lock the appropriate ROT switch.

4. If the blower is to be out of service for an extended period of time, disconnect power source.

Note: The grit chamber blowers will also shut down on low discharge pressure or as called for by PLC-HW

Grit Pumps

Shut down the grit pumps according to the procedures listed below:

1. Turn the respective HOA switch at LCP-GP at the PST-LCC-EAST pumps to be shut down to the “Off” position.

2. Verify the pump is stopped.

3. Lock the appropriate ROT switch.

4. If the pump is to be out of service for an extended period of time, close the isolation valves on pump suction and discharge sides.

Note: The grit pumps will also shut down on pump failure and grit classifier failure conditions or as called for by PLC-HWE

Grit Classifiers/Separators

Shut down the grit classifiers/separators according to the procedures listed below:

1. Turn the respective On/Off switch at LCP-GP at the HW-LCC-EAST for the grit classifier/separator to be shut down to the “Off” position.

2. Verify the grit classifier/separator is stopped.

3. Lock the appropriate ROT switch.

4. If the grit classifier/separator is to be out of service for an extended period of time, disconnect power source.

Note: The grit classifier/separator will also shut down on a grit classifier/separator failure condition

Grit/Screenings Storage Bin Winches

Shut down the grit/screenings storage bin winches as follows:

1. Release the respective Forward/Off/Reverse switch. The switch should spring return to the “Off” position to stop the associated winch.

2. Turn electric power off by using the local disconnect switch.

3. Make sure the clutch is engaged, this will help keep the wire rope from uncoiling.

NPW

Individual Units Start Up

NPW Pump 1 Station

Trigger:

Operation of Non-Potable Water Pump Station No.1

Equipment:

NP Water Pump Station No. 1 pumps Inlet and discharge valves Air compressors Hydropneumatic tank Local ROT switches Local Control Panel – NPW1

Procedure:

Refer to General System Start-up Procedures, for initial startup of the system.

1. Remove lock and tag and energize LCP-NPW1.

2. Remove locks and tags and energize circuit breakers in MCC-NPW1

3. Verify that all branches and services off the NPW system are valved off.

4. Close all NPW system valves.

NPW Wetwell

Procedure

1. Verify that there is no debris in the NPW wetwell.

2. Close the isolation valve on the NPW wetwell drain.

3. Verify that the two wetwell float switches are energized and are operational.

4. Verify that the float valve on the inlet line to the NPW wetwell is operational and is set to open at 9.17ft and to close at 7.5ft below the top of the wetwell.

5. Open the motor-operated inlet valve to the NPW wet well and place it in the

“Auto” position.

6. Verify that the float valve closes at 7.5ft below the top of the wetwell.

Hydropneumatic Tank

Procedure

1. Verify that the air compressors are operational.

2. With the HOA switches at the LCP-NPW1 in the “Off” position, place each compressor’s ROT switch in the “Remote” position.

3. Close the isolation valve on the air fill line to the hydropneumatic tank and manually open the solenoid valve on the air fill line.

4. Open the gate valve between the hydropneumatic tank and the NPW discharge header. Allow the system to stabilize.

5. Place the HOA switch for one air compressor in the “Hand” position while monitoring the level of the hydropneumatic tank. Open the air fill line ball valve simultaneously. When the tank level drops to 5.5ft above the concrete pad, close the air fill isolation ball valve, then turn off the air compressor.

6. Place the HOA switch for NPW Pump 1 in the “Hand” position while simultaneously monitoring the hydropneumatic tank level. When the tank level reaches 7.5ft above the concrete pad, place the pump in the “Off” position.

7. Repeat steps 5 and 6 until the system pressure reaches 85 psi.

Air Compressors

Procedure

1. Select the compressor that will be in service.

2. Verify that the valving is in the proper orientation.

3. Place the respective ROT switch in the “Remote” position.

4. For the automatic mode of operation, place the appropriate HOA switch at the

LCP-NPW1 in the “Auto” position to start the selected compressor.

i. The selected compressor will automatically start and stop based on a signal equal to low pressure in the air receiver.

5. For the manual mode of operation, place the appropriate HOA switch at the LCP-

NPW1 in the “Hand” position to start the selected compressor.

i. After a 0 to 180 second delay, the compressor motor starts and the compressor will run continuously.

Vertical Turbine NPW Pumps

Procedure

1. Select the pump that will serve as the lead pump.

2. Verify the pump inlet and outlet valves are in the proper orientation.

3. Place each pump’s ROT switch in the “Remote” position.

4. For the automatic mode of operation, place the appropriate HOA switch at the

LCP-NPW1 in the “Auto” position to start the selected pump.

i. The pump will automatically start and stop based on system pressure.

5. For the manual mode of operation, place the appropriate HOA switch at the LCP-

NPW1 in the “Hand” position to start the selected pump.

i. After a 0 to 180 second delay, the pump starts and will operate continuously.

6. Monitor the pump’s pressure gauge. The pressure should range from 70 to 90 psi.

NPW Water Pump 2 Station

Trigger:

Operation of Non-Potable Water Pump Station No.2

Equipment:

NP Water Pump Station No. 2 pumps Inlet and discharge valves Air compressors Hydropneumatic tank Local ROT switches Local Control Panel – NPW2

Procedure:

Refer to General System Start-up Procedures, 4.5.2.3.1, for initial startup of the system.

1. Remove lock and tag and energize LCP-NPW2.

2. Remove locks and tags and energize circuit breakers in MCC-NPW2

3. Verify that all branches and services off the NPW system are valved off. Close all NPW system valves.

NPW Wetwell 2

Procedure:

1. Verify that there is no debris in the NPW wetwell.

2. Close the isolation valve on the NPW wetwell drain.

3. Verify that the two wetwell float switches are energized and are operational.

4. Verify that the float valve on the inlet line to the NPW wetwell is operational and is set to open at 9.17ft and to close at 7.5ft below the top of the wetwell.

5. Open the motor-operated inlet valve to the NPW wet well and place it in the

“Auto” position.

6. Verify that the float valve closes at 7.5ft below the top of the wetwell.

Hydropneumatic Tank 2

Procedure:

1. Verify that the air compressors are operational.

2. With the HOA switches at the LCP-NPW2 in the “Off” position, place each compressor’s ROT switch in the “Remote” position.

3. Close the isolation valve on the air fill line to the hydropneumatic tank and manually open the solenoid valve on the air fill line.

4. Open the gate valve between the hydropneumatic tank and the NPW discharge header. Allow the system to stabilize.

5. Place the HOA switch for one air compressor in the “Hand” position while monitoring the level of the hydropneumatic tank. Open the air fill line ball valve simultaneously. When the tank level drops to 5.5ft above the concrete pad, close the air fill isolation ball valve, then turn off the air compressor.

6. Place the HOA switch for NPW Pump 1 in the “Hand” position while simultaneously monitoring the hydropneumatic tank level. When the tank level reaches 7.5ft above the concrete pad, place the pump in the “Off” position.

7. Repeat steps 5 and 6 until the system pressure reaches 85 psi.

Air Compressors NPW 2

Procedure:

1. Select the compressor that will be in service.

2. Verify that the valving is in the proper orientation.

3. Place the respective ROT switch in the “Remote” position.

4. For the automatic mode of operation, place the appropriate HOA switch at the

LCP-NPW1 in the “Auto” position to start the selected compressor.

i. The selected compressor will automatically start and stop based on a signal equal to low pressure in the air receiver.

5. For the manual mode of operation, place the appropriate HOA switch at the LCP-

NPW2 in the “Hand” position to start the selected compressor.

i. After a 0 to 180 second delay, the compressor motor starts and the compressor will run continuously.

Vertical Turbine NPW Pumps 2

Procedure:

1. Select the pump that will serve as the lead pump.

2. Verify the pump inlet and outlet valves are in the proper orientation.

3. Place each pump’s ROT switch in the “Remote” position.

4. For the automatic mode of operation, place the appropriate HOA switch at the

LCP-NPW2 in the “Auto” position to start the selected pump.

i. The pump will automatically start and stop based on system pressure.

5. For the manual mode of operation, place the appropriate HOA switch at the LCP-

NPW2 in the “Hand” position to start the selected pump.

i. After a 0 to 180 second delay, the pump starts and will operate

6. Monitor the pump’s pressure gauge. The pressure should range from 70 to 90 psi.

Primary Sedimentation

The following is a procedure for the start-up and shut-down of the Primary Sedimentation Tanks (PST’s) for the South Bay International Wastewater Treatment Plant.

Procedures:

Start-Up

1. Visually inspect tanks, covers, PST Gallery, PST Access Gallery, and the Skimming's Dry Well for any signs of damage, wear, or improper installation.

All areas (tanks, sludge collectors, weirs, etc.) should…