June 04, 2018 03:26 PM Report #: 1 / 24

DC Water Work Order Details Report

WO #: 16-96977

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMAsset:

Location: LC1321 AIR CONDITIONING, HVAC, FACILITIES MAINTENACE, PLANT WIDE GENERAL

Sched Start: Site: DCWASA Job Plan: ACU-HV-1Y-001Sched Finish: Priority: 0 Supervisor: Michael A. LittletonTarget Start: 12/6/15 Calc. Priority: 1 Work Type: PM

Target Finish: 12/6/15 Parent: Status: CANActual Start: Report Date: 11/23/15 Status Date: 3/27/17

Actual Finish: Reported By: Maximo System Administrator

Failure Class: AC

Problem: Cause: Remedy:

Est Lab Hrs: 3 Est Lab Cost: 0 Est Mat Cost: 0

Act Lab Hrs: 0 Act Lab Cost: 0 Act Mat Cost: 0

Trade: Owner Group: WF_FAC_HVAC Labor Group:

June 04, 2018 03:26 PM Report #: 2 / 24

DC Water Work Order Details Report

WO #: 16-96977

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations10 SAFETY/HEALTH AND ENVIRONMENTAL

CONTROLSCAN 0

Possible Hazards during inspection: 1. Rotating equipment hazard: Rotating shafts 2. Pinch hazard: Opening and closing of covers and hatches3. Trip/Slip hazard: Could be water, polymer and/or oil on floor4. Electrical Hazard: Have to turn off the disconnect5. Poor Lighting- Visibility is problematic.6. Sharpness Hazard: Be careful not to touch the filter drum’s desiccant media as it is sharp.7. Noise Hazard: The Compressors in the same room are very noisy. Ear Protection advised.8. Spider Hazard: There may be a buildup of spiders in the area (please report to supervisor)

Estimated Hours and labor resources required: 3 hour per unitOne HVAC technician

20 SPECIAL TOOLS, EQUIPMENT AND SERVICES

CAN 0

June 04, 2018 03:26 PM Report #: 3 / 24

DC Water Work Order Details Report

WO #: 16-96977

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date ObservationsTools Required:1. Standard Plant PPE2. Flashlight3. Hand Rags4. Small Hand Tools5. Two 24x24x2 Pleated Filters [Per UAD] 6. One 24x24x4 Pleated Filter [Per UAD] 7. One12x12x2 Pleated Filter (Metal Frame) [Per UAD] 8. EP 2 Grease As Needed 9. Standard Grease Gun 10. 6’+ Borescope with lighting capabilities 11. Cross Check or Lock Tight bolt and nut marker 12. Thin Piece of Cardboard/Thick piece of paper such as a business card 13. Thermometer Probe14. Differential Pressure Manometer15. Humidity/Temperature Monitor16. Infrared Camera

30 SPECIAL INSTRUCTIONS/DOCUMENTS CAN 0

June 04, 2018 03:26 PM Report #: 4 / 24

DC Water Work Order Details Report

WO #: 16-96977

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations1. Pre-Coordination Activitya) Contact the Operations Solids Processing Building Supervisor to inform them that Preventive maintenance inspection is going to be carried out on the Dry Polymer Unloading Air Dehumidifiers.

3. Inspect the Unloading Air Dehumidifier (UAD-1, 2) Desiccant Media Seal, Media Bearings and Drive Belta) Remove the access panelb) Visually inspect for gaps between the desiccant media and the seal and adjust as required to close gaps.c) Slide a semi-rigid piece of thick paper or thin piece of cardboard (I.e. business card) between the desiccant media and the seal. If the material slides through with little or no restriction the seal needs to be replaced.d) Rotate the media by hand and check the shaft bearings for smooth operation. If the media does not turn smoothly upon the shaft check the bearings in the media or have your supervisor contact Bry-Air at 877-427-9247 for further instructions (in case of emergency they can be reached at 740-965-2974)e) Inspect the Desiccant drive belt for cuts, tears, wear and slack in the belt. f) So long as the desiccant drum is not contaminated by dirt and debris it does not need to be replaced or cleaned. g) Restore the access panel.

100 INITIATE LOTO CAN 0 Implement attached Lockout Tagout Procedures

110 INSPECT THE UNLOADING AIR DEHUMIDIFER (UAD-1,2) DESICCANT MEDIA SEAL, MEDIA BEARINGS & DRIVE BELT

CAN 0

June 04, 2018 03:26 PM Report #: 5 / 24

DC Water Work Order Details Report

WO #: 16-96977

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations1.Inspect the Desiccant Media Seal, Bearings, and Drive Belt a)Remove the access panelb)Visually inspect for gaps between the desiccant media and the seal and adjust as required to close gaps.c)Slide a semi-rigid piece of thick paper or thin piece of cardboard (I.e. business card) between the desiccant media and the seal. If the material slides through with little or no restriction the seal needs to be replaced.d)Rotate the media by hand and check the shaft bearings for smooth operation. If the media does not turn smoothly upon the shaft check the bearings in the media or have your supervisor contact Bry-Air at 877-427-9247 for further instructions (in case of emergency they can be reached at 740-965-2974)e)Inspect the Desiccant drive belt for cuts, tears, wear and slack in the belt. f)So long as the desiccant drum is not contaminated by dirt and debris it does not need to be replaced or cleaned. g)Restore the access panel

2.Inspect the Unloading Air Dehumidifier (UAD-1, 2) Filters Check the condition of the air filters: a)Check the gasket on the doors for the filters. If the gasket is torn it won’t seal.b)Inspect the cleanliness of the 3 cardboard filters. Replace if needed.c)Check the metal case enclosed filter at the heaters by the temperature probe port. Inspect for cleanliness. Replace if needed.

120 INSPECT THE UNLOADING AIR DEHUMIDIFIER (UAD-1, 2) PROCESS AND REACTIVATION BLOWER FANS ON THE HEATER SIDE

CAN 0

a) Check fan assembly mounting hardware tightness. Make sure there are no loose bolts. Use cross check to mark them once torqued.b) Check the fan wheel blades for accumulation of dust and dirt using a borescope. (If you have to clean the fan blades off, a wet vac can be used to suck the dirt particles off the blades). c) Inspect the condition of the ductwork. Look for cracks in the ductwork, holes, rust, damage in the insulation. Shine a flashlight into the vent and look for dust or debris. If the ductwork condition is poor have your supervisor write a corrective maintenance work order.

June 04, 2018 03:26 PM Report #: 6 / 24

DC Water Work Order Details Report

WO #: 16-96977

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations130 PREPARING TO LUBRICATE THE

UNLOADING AIR DEHUMIDIFIER MOTOR (UAD-1, 2)

CAN 0

a) Fan motor bearings Process (Blower only, the drive motor is permanently lubricated).b) Replace one pipe plug on each end shield with grease fitting. c) Remove other plug for grease relief

140 REMOVE LOTO CAN 0

150 INSPECT THE AIR COOLED CONDENSING UNIT ACCU-1, 2

CAN 0

a) Check compressors oil level, if low allow the compressor to operate continuously at full load for 3 to 4 hours, checking the oil level at 30-minute intervals. If level remains low, add oil. While waiting for the compressor check to ensure that the duct vent doors on the roof are closed, and inspect the hatch doors on the duct lines to the UADs, to ensure that there is no foreign matter present. Also use the Humidity Probe to check the surrounding humidity in the Silo and Baghouse area, to ensure that the relative humidity is below 50%.b) Observe the oil pressure. The oil pressure gauge reading should be approximately 20 to 35 PSI above the suction pressure gauge reading.c) Stop the compressor and check the shaft seal for excessive oil leakage, If found, check the seal with a refrigerant leak detector (open compressor only).d) Check the general operation conditions, system pressures, refrigerant sight glass, etc.e) Check the condition of the condenser coils and clean as necessary.f) Check reactivation inlet temperatures. Should be between 90F and 110F.g) Check process and reactivation pressure drops. To 180.3 psi at 90F.h) If there are any discrepancies contact your supervisor to write a CM workorder on the ACCUs.

900 HOUSE KEEPING AND CLEAN-UP CAN 0

June 04, 2018 03:26 PM Report #: 7 / 24

DC Water Work Order Details Report

WO #: 16-96977

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations1. Final check a) Check that doors are securely latched.b) Some additional examples of observations may include the following:

Sounds, Smells and Visual inspection items

Sound• Squeaking• Banging• High pitch vibrationVisual• Broken/Loose panels, bolts, covers, wires, etc.Smell • Plastic burning• Oil burning

2. Post Task Co-ordinationa) Document this work order noting all discrepancies found so corrective maintenance (CM) work orders can be written. Supervisor will create CM WO in CMMS (Maximo).b) Inspect and note the surrounding area for discrepancies, housekeeping, and potential safety issues.

910 NOTIFY OPERATIONS THAT WORK IS COMPLETE AND OF CURRENT OPERATING STATE. OPERATIONS MAY CONDUCT A TEST RUN AT THIS TIME (OPTIONAL).

CAN 0

Planned Labor

Task ID Craft Labor Qty Hours

HVAT 1 03:00

Total Planned Labor: 3.00

June 04, 2018 03:26 PM Report #: 8 / 24

DC Water Work Order Details Report

WO #: 16-96977

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMLabor Used

Date Employee Hourslaboel laboel laboel

laboel laboel laboel

laboel laboel laboel

laboel laboel laboel

June 04, 2018 03:26 PM Report #: 9 / 24

DC Water Work Order Details Report

WO #: 17-52347

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMAsset:

Location: LC1321 AIR CONDITIONING, HVAC, FACILITIES MAINTENACE, PLANT WIDE GENERAL

Sched Start: Site: DCWASA Job Plan: ACU-HV-1Y-001Sched Finish: Priority: 0 Supervisor: Michael A. LittletonTarget Start: 12/6/16 Calc. Priority: 1 Work Type: PM

Target Finish: 12/6/16 Parent: Status: CLOSEActual Start: 9/1/17 Report Date: 10/31/16 Status Date: 12/3/17

Actual Finish: 9/1/17 Reported By: Maximo System Administrator

Failure Class: AC

Problem: Cause: Remedy:

Est Lab Hrs: 3 Est Lab Cost: 0 Est Mat Cost: 0

Act Lab Hrs: 0 Act Lab Cost: 0 Act Mat Cost: 0

Trade: Owner Group: WF_FAC_HVAC Labor Group:

June 04, 2018 03:26 PM Report #: 10 / 24

DC Water Work Order Details Report

WO #: 17-52347

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations10 SAFETY/HEALTH AND ENVIRONMENTAL

CONTROLSCLOSE 0

Possible Hazards during inspection: 1. Rotating equipment hazard: Rotating shafts 2. Pinch hazard: Opening and closing of covers and hatches3. Trip/Slip hazard: Could be water, polymer and/or oil on floor4. Electrical Hazard: Have to turn off the disconnect5. Poor Lighting- Visibility is problematic.6. Sharpness Hazard: Be careful not to touch the filter drum’s desiccant media as it is sharp.7. Noise Hazard: The Compressors in the same room are very noisy. Ear Protection advised.8. Spider Hazard: There may be a buildup of spiders in the area (please report to supervisor)

Estimated Hours and labor resources required: 3 hour per unitOne HVAC technician

20 SPECIAL TOOLS, EQUIPMENT AND SERVICES

CLOSE 0

June 04, 2018 03:26 PM Report #: 11 / 24

DC Water Work Order Details Report

WO #: 17-52347

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date ObservationsTools Required:1. Standard Plant PPE2. Flashlight3. Hand Rags4. Small Hand Tools5. Two 24x24x2 Pleated Filters [Per UAD] 6. One 24x24x4 Pleated Filter [Per UAD] 7. One12x12x2 Pleated Filter (Metal Frame) [Per UAD] 8. EP 2 Grease As Needed 9. Standard Grease Gun 10. 6’+ Borescope with lighting capabilities 11. Cross Check or Lock Tight bolt and nut marker 12. Thin Piece of Cardboard/Thick piece of paper such as a business card 13. Thermometer Probe14. Differential Pressure Manometer15. Humidity/Temperature Monitor16. Infrared Camera

30 SPECIAL INSTRUCTIONS/DOCUMENTS CLOSE 0

June 04, 2018 03:26 PM Report #: 12 / 24

DC Water Work Order Details Report

WO #: 17-52347

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations1. Pre-Coordination Activitya) Contact the Operations Solids Processing Building Supervisor to inform them that Preventive maintenance inspection is going to be carried out on the Dry Polymer Unloading Air Dehumidifiers.

3. Inspect the Unloading Air Dehumidifier (UAD-1, 2) Desiccant Media Seal, Media Bearings and Drive Belta) Remove the access panelb) Visually inspect for gaps between the desiccant media and the seal and adjust as required to close gaps.c) Slide a semi-rigid piece of thick paper or thin piece of cardboard (I.e. business card) between the desiccant media and the seal. If the material slides through with little or no restriction the seal needs to be replaced.d) Rotate the media by hand and check the shaft bearings for smooth operation. If the media does not turn smoothly upon the shaft check the bearings in the media or have your supervisor contact Bry-Air at 877-427-9247 for further instructions (in case of emergency they can be reached at 740-965-2974)e) Inspect the Desiccant drive belt for cuts, tears, wear and slack in the belt. f) So long as the desiccant drum is not contaminated by dirt and debris it does not need to be replaced or cleaned. g) Restore the access panel.

100 INITIATE LOTO CLOSE 0 Implement attached Lockout Tagout Procedures

110 INSPECT THE UNLOADING AIR DEHUMIDIFER (UAD-1,2) DESICCANT MEDIA SEAL, MEDIA BEARINGS & DRIVE BELT

CLOSE 0

June 04, 2018 03:26 PM Report #: 13 / 24

DC Water Work Order Details Report

WO #: 17-52347

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations1.Inspect the Desiccant Media Seal, Bearings, and Drive Belt a)Remove the access panelb)Visually inspect for gaps between the desiccant media and the seal and adjust as required to close gaps.c)Slide a semi-rigid piece of thick paper or thin piece of cardboard (I.e. business card) between the desiccant media and the seal. If the material slides through with little or no restriction the seal needs to be replaced.d)Rotate the media by hand and check the shaft bearings for smooth operation. If the media does not turn smoothly upon the shaft check the bearings in the media or have your supervisor contact Bry-Air at 877-427-9247 for further instructions (in case of emergency they can be reached at 740-965-2974)e)Inspect the Desiccant drive belt for cuts, tears, wear and slack in the belt. f)So long as the desiccant drum is not contaminated by dirt and debris it does not need to be replaced or cleaned. g)Restore the access panel

2.Inspect the Unloading Air Dehumidifier (UAD-1, 2) Filters Check the condition of the air filters: a)Check the gasket on the doors for the filters. If the gasket is torn it won’t seal.b)Inspect the cleanliness of the 3 cardboard filters. Replace if needed.c)Check the metal case enclosed filter at the heaters by the temperature probe port. Inspect for cleanliness. Replace if needed.

120 INSPECT THE UNLOADING AIR DEHUMIDIFIER (UAD-1, 2) PROCESS AND REACTIVATION BLOWER FANS ON THE HEATER SIDE

CLOSE 0

a) Check fan assembly mounting hardware tightness. Make sure there are no loose bolts. Use cross check to mark them once torqued.b) Check the fan wheel blades for accumulation of dust and dirt using a borescope. (If you have to clean the fan blades off, a wet vac can be used to suck the dirt particles off the blades). c) Inspect the condition of the ductwork. Look for cracks in the ductwork, holes, rust, damage in the insulation. Shine a flashlight into the vent and look for dust or debris. If the ductwork condition is poor have your supervisor write a corrective maintenance work order.

June 04, 2018 03:26 PM Report #: 14 / 24

DC Water Work Order Details Report

WO #: 17-52347

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations130 PREPARING TO LUBRICATE THE

UNLOADING AIR DEHUMIDIFIER MOTOR (UAD-1, 2)

CLOSE 0

a) Fan motor bearings Process (Blower only, the drive motor is permanently lubricated).b) Replace one pipe plug on each end shield with grease fitting. c) Remove other plug for grease relief

140 REMOVE LOTO CLOSE 0

150 INSPECT THE AIR COOLED CONDENSING UNIT ACCU-1, 2

CLOSE 0

a) Check compressors oil level, if low allow the compressor to operate continuously at full load for 3 to 4 hours, checking the oil level at 30-minute intervals. If level remains low, add oil. While waiting for the compressor check to ensure that the duct vent doors on the roof are closed, and inspect the hatch doors on the duct lines to the UADs, to ensure that there is no foreign matter present. Also use the Humidity Probe to check the surrounding humidity in the Silo and Baghouse area, to ensure that the relative humidity is below 50%.b) Observe the oil pressure. The oil pressure gauge reading should be approximately 20 to 35 PSI above the suction pressure gauge reading.c) Stop the compressor and check the shaft seal for excessive oil leakage, If found, check the seal with a refrigerant leak detector (open compressor only).d) Check the general operation conditions, system pressures, refrigerant sight glass, etc.e) Check the condition of the condenser coils and clean as necessary.f) Check reactivation inlet temperatures. Should be between 90F and 110F.g) Check process and reactivation pressure drops. To 180.3 psi at 90F.h) If there are any discrepancies contact your supervisor to write a CM workorder on the ACCUs.

900 HOUSE KEEPING AND CLEAN-UP CLOSE 0

June 04, 2018 03:26 PM Report #: 15 / 24

DC Water Work Order Details Report

WO #: 17-52347

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations1. Final check a) Check that doors are securely latched.b) Some additional examples of observations may include the following:

Sounds, Smells and Visual inspection items

Sound• Squeaking• Banging• High pitch vibrationVisual• Broken/Loose panels, bolts, covers, wires, etc.Smell • Plastic burning• Oil burning

2. Post Task Co-ordinationa) Document this work order noting all discrepancies found so corrective maintenance (CM) work orders can be written. Supervisor will create CM WO in CMMS (Maximo).b) Inspect and note the surrounding area for discrepancies, housekeeping, and potential safety issues.

910 NOTIFY OPERATIONS THAT WORK IS COMPLETE AND OF CURRENT OPERATING STATE. OPERATIONS MAY CONDUCT A TEST RUN AT THIS TIME (OPTIONAL).

CLOSE 0

Planned Labor

Task ID Craft Labor Qty Hours

HVAT 1 03:00

Total Planned Labor: 3.00

June 04, 2018 03:26 PM Report #: 16 / 24

DC Water Work Order Details Report

WO #: 17-52347

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMLabor Used

Date Employee Hourslaboel laboel laboel

laboel laboel laboel

laboel laboel laboel

laboel laboel laboel

June 04, 2018 03:26 PM Report #: 17 / 24

DC Water Work Order Details Report

WO #: 18-48217

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMAsset:

Location: LC1214 DEHUMIDIFIER, ASSEMBLY, UAD-1, UNLOADING SYSTEM, DRY POLYMER, PLANT CHEMICALS

Sched Start: Site: DCWASA Job Plan: ACU-HV-1Y-001Sched Finish: Priority: 0 Supervisor: Michael A. LittletonTarget Start: 12/6/17 Calc. Priority: 562 Work Type: PM

Target Finish: 12/6/17 Parent: Status: CLOSEActual Start: 4/6/18 Report Date: 10/30/17 Status Date: 4/6/18

Actual Finish: 4/6/18 Reported By: Maximo System Administrator

Failure Class:

Problem: Cause: Remedy:

Est Lab Hrs: 3 Est Lab Cost: 0 Est Mat Cost: 0

Act Lab Hrs: 0 Act Lab Cost: 0 Act Mat Cost: 0

Trade: Owner Group: WF_FAC_HVAC Labor Group:

June 04, 2018 03:26 PM Report #: 18 / 24

DC Water Work Order Details Report

WO #: 18-48217

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations10 SAFETY/HEALTH AND ENVIRONMENTAL

CONTROLSCLOSE 0

Possible Hazards during inspection: 1. Rotating equipment hazard: Rotating shafts 2. Pinch hazard: Opening and closing of covers and hatches3. Trip/Slip hazard: Could be water, polymer and/or oil on floor4. Electrical Hazard: Have to turn off the disconnect5. Poor Lighting- Visibility is problematic.6. Sharpness Hazard: Be careful not to touch the filter drum’s desiccant media as it is sharp.7. Noise Hazard: The Compressors in the same room are very noisy. Ear Protection advised.8. Spider Hazard: There may be a buildup of spiders in the area (please report to supervisor)

Estimated Hours and labor resources required: 3 hour per unitOne HVAC technician

20 SPECIAL TOOLS, EQUIPMENT AND SERVICES

CLOSE 0

June 04, 2018 03:26 PM Report #: 19 / 24

DC Water Work Order Details Report

WO #: 18-48217

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date ObservationsTools Required:1. Standard Plant PPE2. Flashlight3. Hand Rags4. Small Hand Tools5. Two 24x24x2 Pleated Filters [Per UAD] 6. One 24x24x4 Pleated Filter [Per UAD] 7. One12x12x2 Pleated Filter (Metal Frame) [Per UAD] 8. EP 2 Grease As Needed 9. Standard Grease Gun 10. 6’+ Borescope with lighting capabilities 11. Cross Check or Lock Tight bolt and nut marker 12. Thin Piece of Cardboard/Thick piece of paper such as a business card 13. Thermometer Probe14. Differential Pressure Manometer15. Humidity/Temperature Monitor16. Infrared Camera

30 SPECIAL INSTRUCTIONS/DOCUMENTS CLOSE 0

June 04, 2018 03:26 PM Report #: 20 / 24

DC Water Work Order Details Report

WO #: 18-48217

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations1. Pre-Coordination Activitya) Contact the Operations Solids Processing Building Supervisor to inform them that Preventive maintenance inspection is going to be carried out on the Dry Polymer Unloading Air Dehumidifiers.

3. Inspect the Unloading Air Dehumidifier (UAD-1, 2) Desiccant Media Seal, Media Bearings and Drive Belta) Remove the access panelb) Visually inspect for gaps between the desiccant media and the seal and adjust as required to close gaps.c) Slide a semi-rigid piece of thick paper or thin piece of cardboard (I.e. business card) between the desiccant media and the seal. If the material slides through with little or no restriction the seal needs to be replaced.d) Rotate the media by hand and check the shaft bearings for smooth operation. If the media does not turn smoothly upon the shaft check the bearings in the media or have your supervisor contact Bry-Air at 877-427-9247 for further instructions (in case of emergency they can be reached at 740-965-2974)e) Inspect the Desiccant drive belt for cuts, tears, wear and slack in the belt. f) So long as the desiccant drum is not contaminated by dirt and debris it does not need to be replaced or cleaned. g) Restore the access panel.

100 INITIATE LOTO CLOSE 0 Implement attached Lockout Tagout Procedures

110 INSPECT THE UNLOADING AIR DEHUMIDIFER (UAD-1,2) DESICCANT MEDIA SEAL, MEDIA BEARINGS & DRIVE BELT

CLOSE 0

June 04, 2018 03:26 PM Report #: 21 / 24

DC Water Work Order Details Report

WO #: 18-48217

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations1.Inspect the Desiccant Media Seal, Bearings, and Drive Belt a)Remove the access panelb)Visually inspect for gaps between the desiccant media and the seal and adjust as required to close gaps.c)Slide a semi-rigid piece of thick paper or thin piece of cardboard (I.e. business card) between the desiccant media and the seal. If the material slides through with little or no restriction the seal needs to be replaced.d)Rotate the media by hand and check the shaft bearings for smooth operation. If the media does not turn smoothly upon the shaft check the bearings in the media or have your supervisor contact Bry-Air at 877-427-9247 for further instructions (in case of emergency they can be reached at 740-965-2974)e)Inspect the Desiccant drive belt for cuts, tears, wear and slack in the belt. f)So long as the desiccant drum is not contaminated by dirt and debris it does not need to be replaced or cleaned. g)Restore the access panel

2.Inspect the Unloading Air Dehumidifier (UAD-1, 2) Filters Check the condition of the air filters: a)Check the gasket on the doors for the filters. If the gasket is torn it won’t seal.b)Inspect the cleanliness of the 3 cardboard filters. Replace if needed.c)Check the metal case enclosed filter at the heaters by the temperature probe port. Inspect for cleanliness. Replace if needed.

120 INSPECT THE UNLOADING AIR DEHUMIDIFIER (UAD-1, 2) PROCESS AND REACTIVATION BLOWER FANS ON THE HEATER SIDE

CLOSE 0

a) Check fan assembly mounting hardware tightness. Make sure there are no loose bolts. Use cross check to mark them once torqued.b) Check the fan wheel blades for accumulation of dust and dirt using a borescope. (If you have to clean the fan blades off, a wet vac can be used to suck the dirt particles off the blades). c) Inspect the condition of the ductwork. Look for cracks in the ductwork, holes, rust, damage in the insulation. Shine a flashlight into the vent and look for dust or debris. If the ductwork condition is poor have your supervisor write a corrective maintenance work order.

June 04, 2018 03:26 PM Report #: 22 / 24

DC Water Work Order Details Report

WO #: 18-48217

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations130 PREPARING TO LUBRICATE THE

UNLOADING AIR DEHUMIDIFIER MOTOR (UAD-1, 2)

CLOSE 0

a) Fan motor bearings Process (Blower only, the drive motor is permanently lubricated).b) Replace one pipe plug on each end shield with grease fitting. c) Remove other plug for grease relief

140 REMOVE LOTO CLOSE 0

150 INSPECT THE AIR COOLED CONDENSING UNIT ACCU-1, 2

CLOSE 0

a) Check compressors oil level, if low allow the compressor to operate continuously at full load for 3 to 4 hours, checking the oil level at 30-minute intervals. If level remains low, add oil. While waiting for the compressor check to ensure that the duct vent doors on the roof are closed, and inspect the hatch doors on the duct lines to the UADs, to ensure that there is no foreign matter present. Also use the Humidity Probe to check the surrounding humidity in the Silo and Baghouse area, to ensure that the relative humidity is below 50%.b) Observe the oil pressure. The oil pressure gauge reading should be approximately 20 to 35 PSI above the suction pressure gauge reading.c) Stop the compressor and check the shaft seal for excessive oil leakage, If found, check the seal with a refrigerant leak detector (open compressor only).d) Check the general operation conditions, system pressures, refrigerant sight glass, etc.e) Check the condition of the condenser coils and clean as necessary.f) Check reactivation inlet temperatures. Should be between 90F and 110F.g) Check process and reactivation pressure drops. To 180.3 psi at 90F.h) If there are any discrepancies contact your supervisor to write a CM workorder on the ACCUs.

900 HOUSE KEEPING AND CLEAN-UP CLOSE 0

June 04, 2018 03:26 PM Report #: 23 / 24

DC Water Work Order Details Report

WO #: 18-48217

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMTask IDs

Task ID Description StatusMeasurement

Point Value Date Observations1. Final check a) Check that doors are securely latched.b) Some additional examples of observations may include the following:

Sounds, Smells and Visual inspection items

Sound• Squeaking• Banging• High pitch vibrationVisual• Broken/Loose panels, bolts, covers, wires, etc.Smell • Plastic burning• Oil burning

2. Post Task Co-ordinationa) Document this work order noting all discrepancies found so corrective maintenance (CM) work orders can be written. Supervisor will create CM WO in CMMS (Maximo).b) Inspect and note the surrounding area for discrepancies, housekeeping, and potential safety issues.

910 NOTIFY OPERATIONS THAT WORK IS COMPLETE AND OF CURRENT OPERATING STATE. OPERATIONS MAY CONDUCT A TEST RUN AT THIS TIME (OPTIONAL).

CLOSE 0

Planned Labor

Task ID Craft Labor Qty Hours

HVAT 1 03:00

Total Planned Labor: 3.00

June 04, 2018 03:26 PM Report #: 24 / 24

DC Water Work Order Details Report

WO #: 18-48217

DRY POLYMER ACCU AND UAD HVAC MAINTENANCE PMLabor Used

Date Employee Hourslaboel laboel laboel

laboel laboel laboel

laboel laboel laboel

laboel laboel laboel