COMBINATION JET RODDER

Transcription

1 APPENDIX B SEWER MAINTENANCE SOP INTRODUCTION: Welcome to the Wastewater Collections Section of the City of Modesto Public Works Department. This S.O.P. has been created to assist you while performing sanitary sewer emergency response and maintenance. This SOP is not intended to address every situation encountered when responding to emergency situations and performing system maintenance. An experienced collection system operator, along with this policy, will be able to handle most situations in an efficient and professional manner. PURPOSE: Effective and timely sanitary sewer system maintenance is essential to the health and safety of the citizens served by the City of Modesto. The Wastewater Collection System Section s reliability-centered maintenance program seeks to prevent stoppages and blockages within the sanitary sewer system to prevent Sanitary Sewer Overflows (SSOs) and backups into structures both of which can be harmful to both the public and the environment. OPERATIONS: COMBINATION JET RODDER INTRODUCTION: This Standard Operating Procedure (SOP) provides operators within the Wastewater Collections Section a visual guideline of standard sewer cleaning operations using a combination hydro-jetter/vacuum truck. PURPOSE: The purpose of cleaning and maintaining the sanitary sewer system is to prevent blockages that occur in the main sewer line that can result in backups into homes, businesses and other customer facilities that are connected to the wastewater collection system and to prevent sanitary sewer overflows which can be harmful to both the public and the environment. APPLIES TO: Cleaning is scheduled on a pro-active basis based on historical information. Maintenance is then scheduled prior to when the line is anticipated to plug or fail. Generated work orders are printed and provided to Wastewater Collection System Operators, who then clean the sewer system, remove any stoppages, complete routine sewer cleanings and advise Supervision of any lines that need to be repaired or replaced. Page 1 of 20

2 TABLE OF CONTENTS: Sequence Contents Page # 1 Daily Vehicle Inspection/Equipment Check 12 1 Daily Vehicle Inspection/Equipment Check 13 1 Daily Vehicle Inspection/Equipment Check 14 1 Daily Vehicle Inspection/Equipment Check 15 2 Work Site Arrival/Line Cleaning Operation 16 2 Work Site Arrival/Line Cleaning Operation 17 2 Work Site Arrival/Line Cleaning Operation 18 3 Documentation 19 3 Documentation Sewer Maintenance Logs 20 3 Documentation SSO Response Packet/OP-2 Form 21 4 End of Shift 22 4 End of Shift/Winter Months 23 4 Winter Months/Troubleshooting 24 VEHICLE INSPECTION: 1. Operators are assigned to a crew, given work assignments, and assigned a a tablet. 2. Crews are given folders that will contain: Work assignments (work orders or stickers w/work order numbers) Daily Maintenance Logs OP-2 Forms & SSO Packets (Kept in truck) 3. You will need to do a thorough daily inspection on the sewer Vac-Con, to help you maintain your vehicle in proper working condition and keep you safe. 4. Record the inspection on the Daily Vehicle Inspection Report, this needs to be filled out each day before you leave the plant. (see figure 2a) 5. Don t forget your PPE (Personal Protective Equipment). 6. Ensure the rear door is closed and locked (see figure 5a) Page 2 of 20

3 Safety wing nut not secured 5a. Truck with rear door unlocked & no safety wing nut Note: In order to close the rear door and install the safety wing nut, you will have to start the engine of the truck. 7. Once the engine is running, close and lock the rear door and install the safety wing nut. (see figure 6a) Rear door secured w/safety wing nut 6a. Rear door secured with safety wing nut installed 7. Close and lock fan wash out door (see figures 7a & 7b) Fan wash out door open Switches to lock rear door & raise or lower tank Page 3 of 20

4 Door closed 7a. Fan wash out door open 7b. Fan wash out door closed 8. Check fresh water level by looking at tank sight tube (see figure 8a) Sight tube 8a: Sight tube location 9. Check water pump engine to make sure that it starts. (See figure 9a & 9b) Starter switch 9a: Water pump engine (APU) 9b. Operator control panel for water pump, boom & vacuum switches 10. Make sure that boom is secured in transportation cradle. (see figures 10a & 10b) Page 4 of 20

5 Boom Cradle Boom Latch Boom lights to be used at night to light up work area 10a. Boom unsecured 10b. Secured in transportation cradle 11. Make sure hand held water gun and hose are secured. (see figure 11) Water nozzle and hand gun 11a. Water nozzle and hand gun secured onto truck 12. Make sure that arrow-board and all safety lights are working properly. (See figures 12a & 12b) 12a. Safety lights on arrow-board on 12b: Safety lights on arrow-board turned off 13. Check boom lights, rear flood lights and hose reel light, in the event that you are working after hours to provide a safe working area. 14. Proceed to your designated work area. Page 5 of 20

6 WORK SITE ARRIVAL/LINE CLEANING OPERATION: When you arrive at your job site, put your PPE (Personal Protective Equipment) on and assess your work area. 1. Check traffic and set up traffic control accordingly to provide a safe work zone. 2. By utilizing the sewer map on the tablet; determine pipe size and where to set up to clean as many lines as you can out of one manhole. 3. Operator assesses: safety, traffic situation and set up. 4. Operator communicates set up to passenger. 5. Passenger sets up cones for work zone and directs positioning of truck. 6. Passenger, opens, washes down, and readies manhole for work. 7. Passenger positions grit basket in manhole. 8. Passenger listens/watches closely for direction from operator. 9. Continually monitor work area for hazards. 10. When heavy grease, grit and debris are present, determine the number of vacuum tubes that will be required to vacuum unwanted material from the manhole. 11. Connect to suction hose with ring clamp and lower into manhole just above the flow line. 12. Set up vehicle for cleaning: connecting 8 tubes and securing with clamps, and lower into manhole just above the flow line. Figure 1 Picture needs replaced 11a. Controls for water system pump control for 11b. Remote pendant control handgun, washout and Jetter hose. Page 6 of 20

7 11c. Control panel for water pump & vacuum 13. From the inside of manhole, set nozzle in sewer line preparing to clean upstream Zero Counter Insert grit trap into manhole trough Check Valve position Start APU-water pump Turn on pump 14. Steps to engage hydrostatic pump Slowly move lever to engage pump in position Listen, while moving lever lowers engine R.P.M. Lever full engaged starts pump. Adjust and set desired R.P.M. level. 15. Clean sewer line, check flows from line, and watch trap for build-up of grease, roots, grit and debris to determine style, speed and pressure for proficient cleaning. 16. Remove trapped materials as needed. 17. Passenger monitors upstream manhole and signals arrival of nozzle. 18. Breakdown tubes when job is completed. 19. Remove nozzle from sewer line and clean equipment for the next set up. 20. Pick up all equipment and wash area completely. PRECAUTION: When attaching tubes together make sure that vacuum is either off or at the lowest possible idle position. Hydrostatic pump engaged Page 7 of 20

8 Vacuum device suctioning line while nozzle is cleaning segment Spinner Nozzle cleaning line Page 8 of 20

9 HOW TO CLEAR A STOPPAGE USING A JETTER: The hydro-jetter is an effective tool for clearing sewer stoppages. With training and experience, a collection system operator can relieve a plugged sewer line quickly and safely. 1. First, trace the stoppage downstream using the sewer collection system map provided on the electronic tablet. All manholes upstream of the blockage will be flooded or overflowing based on the water level. Follow the flooded manholes downstream until a non-flooded manhole is located. 2. At this first non-flooded manhole, set-up the Jet/Vac or Vac-Con in the same way as if cleaning (described in WORK SITE ARRIVAL/LINE CLEANING OPERATION) 3. A front shooter or Penetrator nozzle should be selected to clear a stoppage. 4. Begin jetting the line towards the upstream manhole using low to medium pressure. The key is to use just enough water pressure for the hose to travel up the line at a medium speed. 5. The hose should stop moving into the line when the nozzle reaches the stoppage. This is not always the case, so care should always be used. 6. Once the stoppage is located, the hose should be worked back and forth in a 10 to 20 area. The pressure should be increased and hose should be allowed to shoot into the line, toward the stoppage, at high speed. 7. When the nozzle penetrates the stoppage, quickly reduce hose pressure and shut down the water. 8. Within a short time, a high volume of water should begin flowing into the downstream manhole. If water does not begin to flow, continue hydro-jetting operation and working the stoppage. 9. After the line begins flowing again, start water pump and reel hose back in using very low pressure; this is only meant to prevent flattening the hose and/or loss of the nozzle from unscrewing. 10. Be sure to note any grease, roots, or debris that could have caused the stoppage and indicate this on your Daily Maintenance Log. DOCUMENTATION: Documentation is an important part of your job. It helps us to properly record cleaning activities and line conditions. Daily Maintenance Logs are entered into the Computerized Maintenance Management System (CMMS) and the findings noted are used to refine Preventive Maintenance (PM) routines. These records also show what we have done, what still needs to be done, and indicates when Capital Improvement Projects (CIPs) are needed. 1. Make sure that your DAILY MAINTENANCE LOG is filled-in after each setup. This helps other operators pick up where you left off if you re unable to complete your day. NOTE: All paperwork needs to be filled out accurately, completely, legibly and turned in everyday at the end of your shift. 2. Indicate all activities on Daily Maintenance logs in chronological order. 3. At the end of your shift, place all completed paperwork in your Crewleaders inbox. 4. Daily Maintenance logs need to show each line you cleaned or cleared and the conditions found. List only one finding and the worst condition, i.e. GREASE-MEDIUM NOTE: If you encounter a problem with a line or MH that you and your partner are unable to repair while in the field, you will need to make a note suggesting follow-up work and highlight those comments on your sewer maintenance log. Page 9 of 20

10 The following are the types of documentation that you will be filling out on a daily basis with the exception of the OP-2 form from the SSO Packet. NOTE: All Sewer Maintenance Logs need to be written in neatly and legibly. They must also be turned in DAILY at the end of your shift SSO Response Packet/OP-2 Form: The OP-2 form (Appendix F) is used for SSOs (Sanitary Sewer Overflows). This will be filled out completely and turned into your crewleader at the end of your shift. If you have any questions, refer to your SSO Response packet and/or your crew leader will be able to assist you. All paperwork should be turned into your Crewleader at the end of your shift (i.e., Sewer Maintenance Logs and/or Storm Drain Logs, OP-2 form and your tablet so your crewleader can transfer the pictures.) END OF SHIFT 1. Before coming into the plant, fuel truck if below ½ tank. 2. Before coming into plant, de-cant liquid from debris tank.. 2. When necessary the Vac-Con debris tank should be dumped using the following procedure. 3. At the Wastewater Treatment Plant, drive truck to the area for dumping debris. 4. Carefully release the safety locks, then using the control panel, release the door lock and raise the dump body. 2a. NEW PICTURE NEEDED Page 10 of 20

11 5. Turn Debris Tank Flush Valve On. 3a. Debris Tank Flush Valve 6. Start Auxiliary Pump Motor, located in the Operator Control Panel in the front of the truck. 7. Then Turn Handgun Valve to Off Position (located on the front bumper). 5a. Handgun Valve 8. Handle must be closed in order to have more pressure in tank. 9. Empty sewage and debris (i.e., roots, grease, grit and) from holding tank. 10. When holding tank is empty, slowly pull your Vac-Con forward and use the handgun to wash the inside of the tank out and any debris from the rear of the truck. 11. Wash the unit, fan housing and clean the filter. 12. Turn off water pump and open hand gun valve, then close valve for debris tank 13. Lower bed into to the fully down position, close the door, and tighten safety locks. 14. Park your truck. IMPORTANT: Open hand gun valve before closing valve for debris tank. Winter Months: During the winter months when temperatures will remain at or below freezing, at the end of your day, you will need to purge the air system on your truck. Please refer to the following steps to Air Purge the water System Procedure to Air Purge the Water System: 1. Drain all water from water tanks Remove nozzle from rodder hose. 3. Start auxiliary engine. 4. Start truck chassis engine. 5. Turn top rodder hose control valve and bottom pump control valve on the front hose reel to the ON position. 6. Plug air line with female quick coupler into male quick coupler located below the ball valve. 7. Turn air purge valve on left side of water pump to the OPEN position. Page 11 of 20

12 8. Allow air to push water from hose. 9. When hose is free of water, rotate hose reel clockwise until all water is out. 10. CLOSE air purge valve and turn OFF bottom water pump control valve and top rodder hose control valve. 11. Remove handgun and plug from the handgun connection. 12. Turn ON handgun valve. 13. TURN on bottom pump control valve. 14. OPEN air purge valve and wait for all water to be blown from handgun system. 15. Turn OFF bottom pump control valve. 16. Turn OFF handgun valve. 17. CLOSE air purge valves. 18. OPEN debris body flushout valve. 19. Turn ON bottom pump control valve. 20. OPEN air purge valve and wait for all water to be blow from debris body flushout system. 21. Turn OFF bottom pump control valve. 22. CLOSE debris body flushout valve. 23. CLOSE air purge valve. 24. OPEN all three valves on front of pump. 25. OPEN air purge valve and wait for all water to be blown out of pump. 26. CLOSE air purge valve. 27. Unplug air line from below air purge ball valve. (if this step is not done, damage to air brake system could occur.) 28. Shut OFF auxiliary engine. 29. Shut OFF truck chassis engine. 30. Remove drain caps from water system bulkhead fittings under bumper, curbside. 31. NOTE: Store unit with all water system ball valves in the ON position. CAUTION: Water freezes at 32 degrees F. If at all possible try to store unit in an area above this temperature. IF ABOVE PROCEDURE IS FOLLOWED, UNIT SHOULD BE FREE OF WATER. Should any issues arise, prior to leaving the plant, or while out in the field, please contact your crewleader. Page 12 of 20

13 POWER RODDER OPERATIONS INTRODUCTION: This SOP provides operators within the Wastewater Collections Section a visual guideline of standard sewer cleaning operations using a power rodder machine. PURPOSE: The power rodder is an important tool for maintaining a sanitary collection system. There are many times when a power rodder is the preferred method for cleaning a line or clearing a stoppage. Because the power rodder does not use high-pressure water when cleaning or clearing a sanitary line, it is especially useful when there is a high risk of flooding homes and businesses during maintenance operations. The power rodder can also be used to remove otherwise difficult to remove objects, such as, roots, hardened grease, and foreign objects. APPLIES TO: Cleaning is scheduled pro-actively on a reoccurring schedule based on historical information. Maintenance is then scheduled prior to when the line is expected to plug or fail. Generated work orders and or maps are printed and provided to Wastewater Collection System Operators, who then clean the sewer system, remove any stoppages, complete routine sewer cleanings and advise Supervision of any lines that need to be repaired or replaced. TABLE OF CONTENTS: Sequence Contents Page # 1 Vehicle Inspection/Equipment Check 2 2 Work Site Arrival/Line Cleaning Operation 3 2 Work Site Arrival/Line Cleaning Operation 4 2 Work Site Arrival/Line Cleaning Operation 5 2 Work Site Arrival/Line Cleaning Operation 6 2 Work Site Arrival/Line Cleaning Operation 7 3 Documentation 8 3 Documentation Sewer Maintenance Logs 9 3 Documentation SSO Response Packet/OP-2 Form 10 4 End of Shift/Troubleshooting 10 VEHICLE INSPECTION: 1. Operators are assigned to a crew, given work assignments, and assigned a phone and/or a tablet. 2. Crews are given folders that will contain: Work assignments (work orders or stickers w/work order numbers) Daily Maintenance Logs OP-2 Forms & SSO Packets (kept in truck) 3. You will need to do a thorough pre-trip inspection of your power rodder before operating the vehicle. This helps maintain your vehicle in proper working condition and keep you safe. Page 13 of 20

14 4. The Power Rodder Daily Inspection Report, this needs to be filled out every day before you leave the plant. (see figure 1) 5. Don t forget to pick-up any necessary Personal Protective Equipment (PPE) before leaving the yard. WORK SITE ARRIVAL/LINE CLEANING OPERATION: When you arrive at your job site, put on any necessary PPE and assess your work area. 1. Check traffic and set up traffic control to provide a safe work zone.(need new picture with all in appropriate ppe) Page 14 of 20

15 2. Select the proper tool for the type of line conditions expected and utilizing the block book to determine pipe size; select the proper size tool for the line. Page 15 of 20

16 Page 16 of 20

17 3. Check/Install connector (Bullet). Check rod to make sure that a notch has been filed in the rod for both set screws. If notches are not filed use rattail file to make notches in rod approximately 3/16 deep. Tighten set screws with T-handled set wrench. 4. Insert pigtail into bullet connector, place proper auger for job onto opposite end of pigtail and tighten with assembly wrench. (see pages 6 & 7 to help with proper auger selection) Now that you have everything ready, you can follow these steps and properly clean the line. 5. Your partner will open the M/H lid and guide you to where the truck needs to be for the best alignment on the M/H. Remember to lift with your legs when opening manholes. 6. Place the hose and auger assembly into the line.(hose should run away from truck and not under) This is s a two person job and should not be attempted alone. If you have trouble, gently rotate the rod to help negotiate the tool into the line. 7. Set up debris basket and position as needed to catch debris. Page 17 of 20

18 8. Install the hose jack on the head of the bell next to the auger. 9. Secure rope to T-Bar as shown below. This is a properly installed hose-jack. Tri-pod helps to keep the hose stabilized when rotating Page 18 of 20

19 10. Put Tri-Pod on hose and place sandbags on base.(tri-pod no longer used, remove picture and info) 11. Slide out hose support from the back of the truck and place bungee tightly over hose. 12. Tie off rope when needed. 13. Operator now needs to zero out footage counter and reset rod pressure and speed. 14. Slowly start pushing rod in as partner watches to ensure that there are no problems. 15. Ask partner to go to next MH and signal when the auger arrives. 16. Proceed up the line at a steady pace. Should you encounter a problem do the following steps: Back rod up approximately 5 feet Rotate rod clockwise, watch and listen closely to make sure the rod is turning. If the rod is turning, you should hear it slap in the pipe. Push the rod slowly forward working it forward and backwards extending further into the line each time. Once you are past the debris, draw rod back, remove it from line and remove debris and tighten auger. Start again. 17. Once you reach the next MH your partner will signal you to pull back. 18. Install debris clip on rod to clean as you return the rod back onto the spool. 19. Remove hose from MH. 20. Rinse off all equipment into MH. 21. Tighten auger and set screws. 22. Place Hose, Tri-pod, and Hose Jack back in appropriate locations. With time and experience, you will become a more efficient operator. CLEARING A SEWER STOPPAGE USING A POWER RODDER: 1. First, trace the stoppage downstream using the sewer collection system map provided on the electronic tablet. All manholes upstream of the blockage will be flooded or overflowing based on the water level. Follow the flooded manholes downstream until a non-flooded manhole is located. 2. At this first non-flooded manhole, set-up the power rodder in the same way as if cleaning (described in WORK SITE ARRIVAL/LINE CLEANING OPERATION) 3. A reduced-sized square bar corkscrew or auger should be selected to clear a stoppage. 4. Begin by pushing rod with tool upstream using just enough rotation to allow the rod to move without binding up. 5. When the stoppage is reached the rod guide hose should push away from the mouth of the pipe hard. 6. Once the stoppage is located, work the stoppage as described in step 15 above. The idea is that the rod will heat-up and break if the rod is under-tension in the same spot for any length of time. 7. When turning into the blockage, retrieve the rod to pull the blockage apart, then work back into the blockage. 8. When the stoppage is broken, a surge of water will begin running through the manhole. 9. After the stoppage is broken, continue to try and get through the stoppage with the attached tool. 10. If necessary (because downstream access is limited), the power rodder can be used to clear a stoppage from the upstream manhole, by running downstream. Extra care should be used because the operator cannot see the rod as it enters the line. DOCUMENTATION: Page 19 of 20

20 Documentation is an important part of your job. It helps us to maintain proper records of what we have done and what needs to be done. Daily Maintenance Logs are entered into the Computerized Maintenance Management System (CMMS) and the findings noted are used to refine Preventive Maintenance (PM) routines. These reports are also used when deciding when to make repairs and improvements to the system. 1. Make sure that your DAILY MAINTENANCE LOG is filled-in after each setup. This helps other operators pick up where you left off if you re unable to complete your day. NOTE: All paperwork needs to be filled out accurately, completely, legibly and turned in everyday at the end of your shift. 2. Indicate all activities on Daily Maintenance logs in chronological order. 3. At the end of your shift, place all completed paperwork in your Crewleaders inbox. 4. Daily Maintenance logs need to show each line you cleaned or cleared and the conditions found. List only one finding and the worst condition, i.e. GREASE-MEDIUM. If you encounter a problem with a line or MH that you and your partner are unable to clear while in the field, you will need to note and highlight those comments on your sewer maintenance log. The following are the types of documentation that you will be filling out on a daily basis with the exception of the OP-2 form from the SSO Packet. SSO Response Packet/OP-2 Forms The OP-2 form (Appendix F) is used for SSOs (Sanitary Sewer Overflows). This will be filled out complete and turned into your crewleader at the end of your shift if you have responded to an SSO. If you have any questions, refer to your SSO Response packet and/or your crew leader will be able to assist you. END OF SHIFT: 1. At the end of your shift, you and your partner will need to remove your debris bucket and dump it in the drying beds. 2. You and your partner will also need to remove the auger from the rod and place it back in your truck s tool box. 3. Be sure to lock your boxes and your truck. 4. Place ALL paperwork (i.e., sewer maintenance logs, SSO OP-2 forms, and any other paperwork) into the inbox of your assigned Crewleader. 5. Place your tablet on the charger and place in the box designated for your crew. TROUBLESHOOTING: Should any issues arise, prior to leaving the plant, or while out in the field, please contact your crewleader. Page 20 of 20