Operation and Maintenance Manual

Transcription

1 Operation and Maintenance Manual Sanitary Wastewater Treatment Wetland System I-70 Greenfield Rest Area Greenfield, IN May 2004 JFNew 6640 Parkdale Place, Suite S Indianapolis, Indiana (317)

2 Operation and Maintenance Manual I-70 Greenfield Rest Area Wetland System Table of Contents 1.0 Introduction System Layout...2 Auto Samplers...2 Flow meters...3 Weather Station Health and Safety Septic Tank System...5 Septic Tank Maintenance...5 Effluent Filter Maintenance Dosing Tanks...7 Wetland Dosing Lift Station (LS1)...8 Recirculation Lift Station (LS2)...9 Biofield Lift Station (LS-3)...10 Effluent Lift Station (LS-4)...10 General Pump Station Inspection and Maintenance...11 Force Main Air Release Valve Vertical Wetland System Vertical Wetland Maintenance Subsurface Flow (SSF) Wetland System Water Level Adjust Sump (W-3)...16 Vegetation Maintenance...18 Effluent Manifold Cleanouts Adjusting System Flow Adjusting Recirculation...19 Adjusting Flow From Wetland Cells 1/ System Bypass Options Monthly Maintenance Requirements Quarterly Maintenance Requirements Annual Maintenance Requirements Appendix A Inspection Logs Appendix B System Layout and Labels Appendix C Pump Panel Illustration Appendix D System Alarms Appendix E Sludge Volume Chart Appendix F Air Release Valve Maintenance i

3 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, Introduction The I-70 rest area located near Greenfield, Indiana currently uses a series of septic tanks and wetlands to treat an anticipated 10,000 gallons per day (GPD) of sanitary sewage generated at the facility (both the westbound and eastbound rest areas). The system is composed of septic tanks, primary and secondary wetland cells, and biofield. The septic tanks are designed to remove and digest organic solids and to prevent these solids from entering the wetland system. The primary treatment wetlands are constructed as two parallel wetland cells, each with two distinct areas. The first area is a vertical flow wetland cell. The vertical flow cell is designed to reduce ammonia concentrations and to reduce organics from the septic tank effluent to concentrations that will not cause clogging in the second area. The second area is a subsurface horizontal flow wetland cell. This cell removes dissolved organic pollutants and nutrients to reduce the strength of the wastewater. Approximately 80% of the effluent from the primary wetland cells is returned to the second septic tank for further treatment through the system. The remaining 20% flows into a third wetland cell, which provides additional treatment. A portion of the effluent from the third wetland cell is applied to a biofield located on-site. The remainder is pumped to the Greenfield Wastewater Treatment Plant for final treatment and disposal. If either the septic tanks or wetlands are not maintained, they will be unable to function as intended, causing stress to the downstream components and possible failure. This operation and maintenance manual outlines the designed operating capacity of each unit and describes the minimum maintenance required to ensure proper system performance. 1

4 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, System Layout A diagram showing the system layout is provided in Appendix A. In addition to the main treatment system components, there are several flow meters, auto samplers, and a weather station, which will be used to collect system performance data. These devices will be maintained by Purdue University. However, Purdue should be notified if the devices appear to be malfunctioning or damaged or if the INDOT staff conducts any sort of maintenance on them (e.g. unclogging blocked flow meter). Additionally, in the event of a power outage, the devices may need to be reset or recalibrated and Purdue should be notified. The contact for Purdue University is Mr. Tom Cooper at (765) Alternative contacts at Purdue are Mr. Rao S. Govindaraju: (765) and Mr. James E. Alleman: (765) Auto Samplers The auto samplers are housed in large fiberglass enclosures, which contain a refrigerator unit, a pump, and a number of sample bottles. There are a total of four auto samplers present. The first collects samples after the first septic tank. The second collects samples from the wetland dosing tank (LS-1). The third collects samples from the recirculation dosing tank (LS-2) and the fourth collects samples from the biofield dosing tank (LS-3). Plastic tubing connects the auto sampler to the appropriate tank to allow the sample collection. The tubing is encased in a protective sheath to resist tampering. The auto samplers shall be locked and are clearly labeled with a Biohazard sticker. The samplers can be programmed to collect water samples either based on time of day using programmable timers or flow through the system. The samples will be collected by Purdue and taken for laboratory analysis. Purdue should be notified if the auto samplers appear to be damaged (tubing cut, electrical power cut, sampler dented, sampler opened, etc.). There are no alarms on the auto-samplers. 2

5 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 Flow meters There are three kinds of flow meters present on the system. The first type is a weir flow meter, which measures the depth of water as it flows over a V-notch weir using a level sensor. The second type is a Palmer Bowlus flume flow meter, which measures the flow through a controlled flume using a level sensor. The third type of flow meter is a magnetic flow meter, which measures the flow through a closed pipe using a magnetic field. There are three level sensor flow meters present on the system. F-1 is a weir flow meter between the first septic tank (ST-1) and second septic tank (ST-2). F-2 is a flume flow meter located between the distribution box (DBOX-1) and the third wetland cell (W-3) F-3 is a flume flow meter located between the third wetland cell (W-3) and the biofield dosing tank (LS-3) There are five magnetic flow meters present in the system. M-1 is a magnetic flow meter located between the wetland dosing tank (LS-1) and the first actuator vault (ACT-1), M-2 is a magnetic flow meter located between the recirculation dosing tank (LS-2) and the second septic tank (ST-2) M-3 is a magnetic flow meter located between the biofield dosing tank (LS-3) and the biofield M-4 is a magnetic flow meter located between the effluent dosing tank (LS-4) and the city lift station M-5 is a magnetic flow meter located between the city lift station and the wastewater treatment plant. 3

6 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 The level sensor flow meters have panels and data loggers located within the softener building, above the lift station pump panels. The panel for each magnetic flow meter is located on a panel near the meter. The level sensor flow meters are sensitive to movement within the flow meter vault, so care should be taken during inspection not to bump, step on, or in any way shift the position of the level sensors, flume channels, or weir plate. Flow meter readings will be collected by Purdue University. The three level sensor flow meters have a data logger component that will store some information. The five magnetic flow meters will initially be connected to a data logger located within the soft water building until the SCADA system has been developed at the site, allowing remote access to the data. Weather Station Additionally, a weather station is present near the recirculation dosing tank (LS- 2). This weather station will collect air temperature, soil temperature, wind speed, wind direction, solar radiation, humidity and precipitation data. The weather station contains a data logger to store information that will be downloaded by Purdue. 3.0 Health and Safety Special care should be taken when working on the wetland system. At a minimum, protective disposable gloves and safety glasses or goggles should be worn when inspecting the interior of tanks or flow meters. After work is completed, dispose of gloves and wash hands and any other exposed skin thoroughly with soap and water. 4

7 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, Septic Tank System Septic tanks provide primary treatment of the wastewater, remove suspended solids and begin the breakdown of the complex organics in the wastewater. The septic tanks also remove inorganic solids that would otherwise clog the wetland units. When the tanks are adequately maintained and functioning properly, settling and biological digestion will remove or retain nearly all non-dissolved solids. Septic tanks contain numerous species of bacteria, fungi, and other microorganisms that break down raw sewage in the tank. Since the system is alive, it is important to eliminate, or at least minimize, the use of toxic chemicals and disinfectants in the rest area facilities. Household bleach, for example, should only be used in the quantities and concentrations specified by the manufacturer on the container. Enzyme whiteners are preferable to bleach. Detergent use should also be kept to the quantities specified on the containers. Overuse of detergents is common in hard water areas. Disinfectants are another source of septic tank failures. Very powerful bactericides must be used in strict accordance with the manufacturer s instructions. Furthermore, the amount of latex paints, solvents, and other industrial liquids washed down the drains should be kept to a minimum. Overuse of any of the above chemicals or products will result in plant and bacterial mortality, which may result in degraded performance of the system. Septic Tank Maintenance This facility uses two 10,000-gallon septic tanks placed in series southwest of the westbound rest area and northeast of the wetland cells. The second tank is equipped with an effluent filter system to help ensure that solids are not discharged to the wetland. There is one access port on the first septic tank (ST- 5

8 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, ). There are two access ports on the second septic tank, one at the inlet (ST-2) and the other at the location of the effluent filters (ST-2F). Septic tanks have three layers of liquid: a grease/scum layer at the top, a clear water layer, and a sludge layer at the bottom. The thickness of each of these layers should be checked on a monthly basis using a Sludge Judge TM or similar product. If the cumulative thickness of grease, scum, and sludge (top and bottom liquid layers) occupies more than 1/3 of the total depth of all layers, the tank should be pumped by a qualified/licensed septic hauler. A Sludge Judge TM can be purchased from Forestry Suppliers, Inc. at (800) A chart is provided in the Appendix A to determine the volume of sludge in the septic tank based on the depth of sludge measured. Effluent Filter Maintenance Proper septic tank function can be assessed by regularly examining the effluent filters in the second septic tank (ST-2F) during monthly inspections. At a minimum, the inspector should wear disposable, protective gloves and safety glasses or goggles when handling the filters. There are a total of four filters in the second septic tank. The filters should each be removed and inspected for clogging. Notes should be made on the field log describing the general coverage and color of bacterial slime, other organic clogging, or grease. Bacterial slime will likely cover much of the filter. However, this slime is only a concern if it is accompanied by particulate organic clogging. Each filter should be removed, placed in a bucket and carried to the open inlet access port on the second septic tank (ST-2). After inspection, each filter should 6

9 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 be sprayed down with a hose over the inlet opening so that all organic material is removed from the filter. The filters should then be reinstalled. 5.0 Dosing Tanks The system contains four separate dosing tanks - the wetland dosing tank (LS-1), which doses the wetland cells 1 and 2, the recirculation dosing tank (LS-2), which returns a portion of the water to ST2, the biofield dosing tank (LS-3), which doses the biofield, and the effluent dosing tank (LS-4), which pumps the treated water back to the city lift station, where it is sent to the Greenfield wastewater treatment plant. Pumps and controls associated with each of these tanks are described below. Three of the dosing tanks (LS-1, LS-2, and LS-4) have float-operated duplex pump systems. This means there are two pumps in each tank, which alternate in use, and that the pumps are activated by a series of floats within the tank. There are a total of four floats within the tank. From bottom to top, they are the OFF float, the ON float, the ALARM float, and the LAG float. During normal operation, the water level will rise in the tank until it reaches the ON float, which will trigger the lead pump to activate. During normal operation, the system will be set up to alternate between the two pumps. The active pump is called the lead pump and the inactive pump is called the lag pump. The lead pump will continue pumping until the water level decreases to the OFF float. The OFF float automatically shuts off the pump to prevent the pump from running dry. At this point the inactive pump is designated as the lead pump so that it will be called for the next pump cycle. This way the lead pump is alternated automatically with each pump cycle. 7

10 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 In some cases, the water level may continue to rise after the ON float has been triggered. The ALARM float is located approximately 6 above the ON float, and will trigger a light and a siren to indicate that the water level is rising even though one pump is on. The alarm will continue to sound until it is manually silenced at the control panel. The fourth and top float is the LAG float, which is located approximately 6 above the ALARM float. The LAG float will turn on the second pump in the system so that both pumps are running at once, to accommodate high influent conditions or in case the lead pump should malfunction while pumping. When the water level returns to the level of the OFF float, both pumps will shut off and the lag and lead pumps will switch. The remaining lift station (LS-3) is a timer-operated duplex system, meaning it has two pumps that alternate in use and each dose for a set amount of time. There are two floats located within the lift station a lower OFF float, which will shut off the pumps if the water level were to drop to that level, and an ALARM float, which will sound an alarm if the water level rises too high in the tank. Wetland Dosing Lift Station (LS1) The septic tanks discharge by gravity to LS1, located just west of the second septic tank. Pumps within this tank lift effluent and send it through PVC pipe to first actuator chamber (ACT-1). Within the actuator chamber is an actuatorcontrolled valve that directs flow into the vertical filter portion of one of the two wetland cells, W-1 or W-2. Under normal operating conditions, one wetland cell will be filled over a set period of time while the other is allowed to empty. The flow will then switch to fill the other cell while the original cell drains. The pumps operate on a level float control system. The ON/OFF floats within the tank are separated by a vertical distance of approximately 24, which provides approximately 417 gallons per dose. The number of doses applied will vary based on actual daily flow, precipitation, and recycle percentage. 8

11 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 Cycle counters should be recorded monthly to check the number of doses. Run time meters should also be recorded to log pump run time and ensure equal pump run times. If significant variations in meter readings occur month to month, JFNew should be contacted to assess whether the pumps are functioning as per the design. Recirculation Lift Station (LS2) Water flows out of either wetland cell W-1 or W-2 and into a second actuator chamber (ACT-2). Within this chamber is an actuator-controlled valve that allows flow out of one of the two wetland cells. Under normal operating conditions, the valve closes the outlet of the cell being filled while opening the outlet to the other cell so it can drain. The flow then switches to drain the full cell while the empty cell is allowed to fill. The water flows into a distribution box (DBOX-1) where five parts are directed to LS-2 and one part is directed to wetland cell W-3. The recirculation rate can be adjusted by plugging holes in the distribution box. Pumps within LS-2 lift the water and send it through the force main to the second septic tank (ST-2) for additional treatment. The pumps operate on a level float control system. The ON/OFF floats within the tank are separated by a vertical distance of approximately 30, which provides approximately 875 gallons per dose. The number of doses applied will vary based on actual daily flow, precipitation, and recycle percentage. Cycle counters should be recorded monthly to check the number of doses. Run time meters should also be recorded to log pump run time and ensure equal pump run time. If significant variations in meter readings occur month to month, JFNew should be contacted to assess whether the pumps are functioning as per the design. 9

12 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 Biofield Lift Station (LS-3) Water that is not recycled flows by gravity from the distribution box (DBOX-1) into wetland cell W-3. A level adjust sump at the end of wetland cell W-3 controls flow out of the cell into the biofield lift station LS-3. There are two pumps within the lift station, which alternate in use. The pumps dose a small amount of water, 100 gallons, to the biofield on a timer-activated cycle at a frequency of 4 times per day for a total of 400 gallons per day. There are two floats within the tank. The first is an OFF float, which prevents the pumps from running dry in the event of manual pumping. The second is an alarm pump indicating high water in the tank. Cycle counters should be recorded monthly to check the number of doses. Run time meters should also be recorded to check pump run time. If significant variations in meter readings occur month to month, JFNew should be contacted to assess whether the pumps are functioning per the design. Effluent Lift Station (LS-4) The biofield lift station LS-3 overflows by gravity into the effluent lift station LS-4. Backwash from the softener building is also discharged to LS-4 through a gravity pipe. Pumps within LS-4 lift the treated water and send it through a new force main. This force main ties into the existing force main that runs from the city lift station to the Greenfield Wastewater Treatment Plant. The pumps operate on a level float control system. The ON/OFF floats within the tank separated at a distance of approximately 18, which provides approximately 140 gallons per dose. The system is expected to dose approximately 70 times a day for a total of 9,800 gallons. The number of doses applied will vary based on actual daily flow, and precipitation. The pumps within this dosing tank are duplex pumps designed to discharge at a rate of 80 GPM. 10

13 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 Cycle counters should be recorded monthly to check the number of doses. Run time meters should also be recorded to log pump run time and ensure equal pump run times. If significant variations in meter readings occur month to month, JFNew should be contacted to assess whether the pumps are functioning as per the design. General Pump Station Inspection and Maintenance Cycle counters for each pump in a lift station should be relatively equal. If cycle counters indicate that one pump has had 10% or more starts than the other pump, one or both counters may not be functioning properly, or a pump may be malfunctioning or the lead/lag switch may be malfunctioning. The inspector should wait and watch the pumps to ensure that both are starting in an alternating sequence. The inspector may also manually start the pump with the selector switch at the control panel or by lifting the ON float to manually trigger the pumps. If one pump is failing to activate, the pump manufacturer should be contacted to assess the pump for possible malfunction. Additionally, the runtime for the two pumps in each lift station should be relatively equal. If pump counters indicate that one pump has a longer runtime than the other pump, this could be an indication that one pump is pumping at a slower rate either due to general wear or malfunction of the lead/lag alternating switch. Floats should be inspected and cleaned on an annual basis. In general, the floats should be set at the distances indicated on the plans to within one inch. Floats and float lines should be rinsed free of bacterial slime, algal growth, or other scum. Check all float settings to ensure pump activation and alarm indicators. 11

14 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 Drainback holes are located on the underside of the outlet pipes inside each lift station. These weep holes allow the pipe to drain of water after pumping. This is important during winter operation when standing water within the pipe could freeze and break the pipe. A stream of water should exit through the weep holes during pump operation and after the pump shuts off if the hole is not clogged. To unclog the weep hole, use a pipe cleaner, or other small tool not likely to break and further clog the hole. Pump any solids deposited in bottom of station/tank at least annually. Manually work all valves through full range of motion on a quarterly basis. Clean check valves to ensure valve is properly seated (see manufacturer s recommendations.) Care should be taken when working above an open pump station to avoid falling into the opening. A small mirror on a broom handle can be used to visually inspect the weep hole to help prevent an accidental fall. On-site staff should be familiar with the alarms and indicator lights on each pump station (see Appendix B). The control panels have several alarms and warning lights to indicate problems. The panels contain both visual and audio alarms. If an alarm triggers, the following checks should be made prior to contacting JFNew, the pump manufacturer, and/or the construction installation contractor: Check on the panel to see if the red pump seal failure light is lit, indicating a seal failure on the pump. Also look to see if the line voltage or phase imbalance lights are lit. If the pump seal failure light is lit Silence the alarm. Leave the pump with the seal failure off. Have the pump serviced. Fill out an entry in the pump alarm log. 12

15 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 If the line voltage or phase imbalance lights are lit Turn off the circuit breakers to the pumps Reset the voltage monitor panel by turning the dial to manual reset and then back to auto reset with delay Check the pump alarm log for previous occurrences and contact manufacturer if problem is persistent. Fill out an entry in the pump alarm log. If no lights are lit, the alarm is associated with high water levels in the pump station. Check the power supply. An interruption in power can allow water levels to rise and trigger the high-level alarm. Check the water level(s) in the tank(s) associated with the alarm(s). If water level is below the alarm float, the alarm malfunctioned or the lag float activated both pumps and returned the water level to normal. High water levels occur when the pumps temporarily fail to keep up with the incoming water flow. This can occur if the lead pump malfunctions while under operation, the lag float fails to activate both pumps, or if extremely high flows raise the water level faster than it can be pumped temporarily. Silence the alarm. Check the pump alarm log for previous occurrences. If the same pump is experiencing multiple high water alarms, the pump should be serviced. Fill out an entry in the pump alarm log. A pump will likely need to be removed only in the event of malfunction or replacement due to normal wear. If both pumps require removal simultaneously, a replacement pump system must be installed while the other pumps are out of service. 13

16 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 Follow the pump manufacturer s recommendations on maintenance and servicing. Force Main Air Release Valve There are two air release valves installed in the system. Both valves are after the final wetland cell (W-3). One is between the lift station LS-4 and the force main connection to the existing force main from the eastbound rest area, while the other is between the city lift station and the city wastewater treatment plant. These valves function both to release any air in the system and to relieve the vacuum created when the pumps switch off. The manufacturer recommends a monthly inspection and backwash. At a minimum, safety glasses and latex gloves should be worn during the inspection. The inspector should verify that the valve is not leaking fluid during normal operation. If leakage is observed, a backwash procedure should be performed on the valve. This is done by connecting a 1 clean water supply of at least 30 psi to the top of the valve. A rubber hose with quick disconnect couplings should be used. Steps for Backwash Procedure (see figure in Appendix B): 1. Pipe valve B to a drain prior to backwashing. 2. Close inlet valve A. 3. Open valve B. 4. Connect water supply to C, open valve D, and supply water for 3 minutes to flush seat and mechanism area. 5. Close valves D and B to wash the body area. 6. Additional washing of seat area can be accomplished by placing the water supply over the discharge port with valve C closed. 7. Slowly open valve A to place unit back in service. 14

17 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, Vertical Wetland System Each wetland cell in the system includes a vertical filter portion where influent is applied to the cell. For cells one and two, the vertical filter is located on the northern end of the cells while for cell three, the vertical filter is located on the southern end of the cell. The vertical filter consists of an elevated gravel mound at one end of the wetland cell. A manifold system sprays wastewater across the entire surface area of the cell above the water surface. This allows the water to aerate as it trickles down into the subsurface portion of the wetland cell. The function of the vertical filter wetland is to provide secondary treatment by reducing the BOD levels in the wastewater and providing ammonia removal. Vertical Wetland Maintenance The vertical filter portions of all three wetland cells should be weeded on a regular basis. No plant growth should be present in the vertical filter areas of cells one and two. Particular attention should be given to removing woody plants (trees) throughout all three wetland cells. On an annual basis, the aggregate over the influent manifold should be scraped aside to inspect the condition of the underlying aggregate. In the event of significant solids buildup, the aggregate should be stirred to break up any clogs and allow water to infiltrate more easily. If flow into one of the cells decreases significantly, the influent manifolds may be clogged. If this becomes a problem, cleanouts can be added and the manifold hydraulically scoured. This can be done using the pumps on LS-1. Set the pumps on LS-1 to manual. Check to make sure that the actuator has opened the flow into the appropriate wetland cell (1 or 2). Open the cleanouts at the ends of 15

18 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 the first lateral. Run one pump in LS-1 for two minutes, or until the liquid runs clear. Close the cleanouts on the first lateral and open the cleanouts at the ends of the second lateral. Run one pump in LS-1 for two minutes, or until the liquid runs clear. Repeat the process for the nine remaining laterals. This will scour any solids deposited inside the pipe. The influent manifold on wetland cell 3 should be cleaned on an annual basis. This manifold is a perforated 4-inch PVC pipe, equipped with PVC cleanouts on either end. The cleanouts may be used as inspection ports for the water level. The cleanouts should also be used to remove any organic material within the manifold. Annually, a long plumber s snake or similar instrument equipped with a cloth or brush should be run through the entire length of the manifold. 7.0 Subsurface Flow (SSF) Wetland System The primary function of the subsurface constructed wetland area is to reduce BOD (biochemical oxygen demand) and to facilitate nitrite & nitrate reduction through biological processes. Prudent (minimal) use and disposal of chemical disinfectants and solvents at the rest area facilities will prevent a biological disruption. The SSF wetland areas in each of the three wetland cells require several maintenance tasks. These include ensuring proper water levels within the cell during operation, removal of woody species as they are evident, and removal of excess dead vegetation. Water Level Adjust Sump (W-3) The third wetland cell (W-3) has a level adjust sump at the outlet, which controls water levels in the cell. The first two cells may utilize the emergency overflow riser pipes in ACT-2 for this purpose also, although during normal operation the 16

19 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 cells should go through a cycle of filling and draining without reaching the top of the wetland. All three standpipes are adjustable in height. Water levels in the wetland cells should be maintained so that the gravel remains saturated just below the gravel surface. Visible ponding of water on the gravel surface must be avoided. Occasionally gravel will settle in a particular area and expose the water surface. If this occurs, fill in the low area with additional gravel or gravel from a high point in the wetland before adjusting the standpipe in the water level adjust sump. If water remains above the gravel surface after regrading, then the standpipe will need to be adjusted as follows: To move the standpipe, loosen the clamps holding the rubber boot using a screwdriver or coin. Lower the upper PVC tube to the desired level and then retighten the clamps on the rubber boot. If water levels in the SSF area of the wetland are above the gravel surface, this pipe should be lowered by an amount equal to the depth of water above the gravel surface. If water levels remain above the gravel surface 24 hours after adjusting the standpipe, the pipe should be lowered another 2-inches. This lowering process should be repeated every 24-hours until the water level drops below the gravel surface. The water level can be adjusted by raising or lowering the upper PVC tube in the level adjust sump. Water levels should be observed using the test wells in cells one and two, and the cleanout access on the effluent manifold in all three cells. If water levels in the SSF wetland are greater than 4-inches below the gravel surface, raise the standpipe in 2-inch increments every 24 hours until the water level rises to within 2-inches of the gravel surface. 17

20 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 Vegetation Maintenance Thick mats of dead vegetation will accumulate over time and restrict the growth of new shoots each spring. Removal or thinning of this dead vegetation in the early spring will expedite the growth of new vegetation and enhance the function and appearance of the wetlands. Annual prescribed burning is the preferred method for removal of dead wetland or prairie vegetation. However, JFNew recommends removal by cutting and disposal for small wetland areas such as these cells. Woody tree species may attempt to colonize areas of the wetland. Woody species produce roots that can puncture the wetland cell liner. Therefore, any colonizing woody species should be cleared from the cell annually or as they establish themselves or new shoots are evident. Effluent Manifold Cleanouts The effluent from each wetland cell exits through a subsurface manifold. This manifold is a perforated 4-inch PVC pipe across the outlet end of the wetland cell. In cells one and two, the manifold has a PVC cleanout on one end and the other end is connected to ACT-2. In the third cell, the manifold is equipped with PVC cleanouts on either end with a 6 pipe connecting the middle of the manifold with the level adjust sump. The cleanouts maybe used as inspection ports for the water level. The cleanouts should also be used to remove any organic material within the manifold. Annually, a long plumber s snake or similar instrument equipped with a cloth or brush should be run through the entire length of the manifold. 18

21 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, Adjusting System Flow There are several options for adjusting flow through the wetland system. In this way, the system can be adapted to meet anticipated changes in daily flow. Adjusting Recirculation It may become necessary to reduce or eliminate recirculation through the system during periods of high flow. This can be done by manually turning off the pumps in LS-2, shutting off the breaker at the tank (e.g. kill switch), or by making adjustments within the flow splitter box (DBOX-1). The flow splitter box (DBOX- 1) contains six 2 vertical pipes all at the same elevation. Five are connected to the recirculation dosing tank (LS-2) and one is connected to the inlet of wetland cell 3. The default recirculation rate is 5/6 or 83% recirculation. The recirculation rate can be decreased by capping one or more of the five vertical pipes leading to LS-2. If one is capped, the recirculation rate will be 4/5 or 80%. If two are capped, the recirculation rate will be 3/4 or 75%. If three are capped, the recirculation rate will be 2/3 or 66%. If four are capped, the flow will be split evenly between the two open pipes, giving a recirculation rate of 1/2 or 50%. If all five are capped, all water will flow into wetland cell 3, giving no recirculation. Likewise, the one pipe leading to wetland cell 3 can be capped to provide 100% recirculation in times of very low flow (for example if the system were to be bypassed for a period of time and the water level needed to be maintained in cells 1 & 2). 19

22 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 Adjusting Flow From Wetland Cells 1/2 The flow from wetland cells 1 and 2 goes through the second actuator vault ACT- 2. Within this vault is an actuator-activated valve that controls which wetland cell is being drained. There is also a manually-adjusted valve for each wetland cell controlling the rate at which the cell is drained. These will be initially set to drain the cells slowly, over a period of 24-hours (the initial actuator cycle for the drainfill sequence). 9.0 System Bypass Options The system contains multiple bypass features that may be adjusted as necessary. General valve operation turn clockwise to close turn counterclockwise to open plug valves turn only ¼ turn either way gate valves turn approximately 5 full turns between fully open & fully closed handle for reaching valves is located in soft water building Option 1 Shut off south (eastbound) rest area only; allow north (westbound) rest area to flow into system Go to valve V-3 east of ST-1 (off pavement) Turn V-3 ¼ turn in counterclockwise direction to open flow to city lift station Go to valve V-4 east of ST-1 (on pavement) Turn V-4 ¼ turn in clockwise direction to close flow to septic tank Option 2 Shut off flow from both sides into system Go to valve V-1 just west of westbound rest area building Turn V-1 ¼ turn in counterclockwise direction to open flow to city lift station Go to valve V-2 southwest of westbound rest area building Turn V-2 ¼ turn clockwise direction to close flow to septic tanks Go to valve V-4 east of ST-1 (on pavement) 20

23 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, 2004 Turn V-4 ¼ turn in counterclockwise direction to open flow to city lift station Go to valve V-3 east of ST-1 (off pavement) Turn V-3 ¼ turn in clockwise direction to close flow to septic tank Option 3 Shut off flow to wetland system after septic tanks Go to valve V-5 northwest of LS-1 Turn V-5 ¼ turn in counterclockwise direction to open flow to city lift station Go to valve V-7 off northwest corner of flow meter M-1. Turn V-7 ¼ turn in clockwise direction to close flow to wetland cells. Valve ID Description Normal Total Bypass Septic Only V-1 Westbound to city Closed Open Closed V-2 Westbound to septic Open Closed Open V-3 Eastbound to septic Open Closed Open V-4 Eastbound to city Closed Open Closed V-5 LS-1 to city Closed Open Open V-6 Exit from LS-1 Open Open Open V-7 LS-1 to ACT-1 Open Closed Closed IMPORTANT NOTE: With any of the valve pairs (1&2, 3&4, 5&7), one valve MUST be opened before the other is closed. Having both valves closed in a pair will result in backup flooding of rest area. 21

24 Operation and Maintenance Manual I-70 Rest Area Greenfield, IN May, Monthly Maintenance Requirements Pump counter and runtime readings should be taken from all panels. Both septic tanks should be sludge judged and pumped as needed The wetland cells should be inspected for proper water level and adjusted as needed Any woody tree species should be removed from the wetland cells The level adjust sump at the outlet of wetland cell 3 should be inspected and cleaned as needed 11.0 Quarterly Maintenance Requirements All valves should be stroked to allow self-lubrication. All alarms should be tested to ensure both the light and siren are operating 12.0 Annual Maintenance Requirements The wetland cells should be inspected & the manifolds cleaned. The pump floats should be inspected, tested, and cleaned. The riser pipe elevations in the flow splitter box (DBOX-1) should be checked and recalibrated if necessary The threads on the flow splitter box riser pipes should be cleaned Inspect and clean drainback holes in lift stations Inspect and clean check valves per manufacturer s recommendations 22

25 Operations and Maintenance Manual I-70 Greenfield Rest Area Sanitary Wetland System Appendix A Inspection Logs 1

26 Monthly Inspection Log Treatment Wetland System Date (MM/DD/YY): Inspector: I-70 Greenfield Rest Area Time: Weather: Septic Tanks ST1 ST2 Sludge Judge Results (in.) Floating Scum Water Thickness Thickness Effluent Filter in ST2 Checked and Cleaned Comments: Sludge Thickness (check) Total Thickness Pump Counters Counter and Run Meter Wetland Dosing Tank (LS1) Recirculation Dosing Tank (LS2) Biofield Dosing Tank (LS3) Effluent Dosing Tank (LS4) Count-1 Count-2 Runtime-1 Runtime-2 Count-1 Count-2 Runtime-1 Runtime-2 Count-1 Count-2 Runtime-1 Runtime-2 Count-1 Count-2 Runtime-1 Runtime-2 Today's Previous Month Reading Date Reading Date Reading Net Difference Wetland Health Checked (check) Level Adjust Sump Checked and Cleaned Comments: (check) 1

27 Annual Inspection Log Treatment Wetland System Date (MM/DD/YY): Inspector: I-70 Greenfield Rest Area Time: Weather: Septic Tanks ST1 ST2 Sludge Judge Results (in.) Floating Scum Water Thickness Thickness Sludge Thickness Floats in LS-1 Checked and Cleaned (check) Floats in LS-2 Checked and Cleaned (check) Floats in LS-3 Checked and Cleaned (check) Floats in LS-4 Checked and Cleaned (check) Drainback Holes in LS-1 Checked and Cleaned (check) Drainback Holes in LS-2 Checked and Cleaned (check) Drainback Holes in LS-3 Checked and Cleaned (check) Drainback Holes in LS-4 Checked and Cleaned (check) Mainfolds in all wetland cells cleaned w/ Snake (check) Total Thickness Dead vegetation & any trees removed from wetland cells (spring) (check) Comments: Flow meter Calibration 2

28 Operations and Maintenance Manual I-70 Greenfield Rest Area Sanitary Wetland System Appendix B System Layout and Labels

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30 Operations and Maintenance Manual I-70 Greenfield Rest Area Sanitary Wetland System Appendix C Pump Panel Illustration

31 I-70 (Greenfield) Rest Area Sanitary Wetland How to Take Pump / Flowmeter Readings November 2003 Pump readings (from pump panel): Pump 1 Cycle Counter Pump 2 Cycle Counter Pump 1 Runtime Meter Pump 2 Runtime Meter On runtime meter: last digit (white background) is in tenths of a minute. = 1.7 minutes

32 Flowmeter Readings A. Sparling magnetic flow meters (panels mounted adjacent to meters) M-1, M-2, M-3, M-4 Display on flowmeter scrolls through Instantaneous flow Cumulative flow Elapsed Time B. Endress & Hauser magnetic flow meter (panel mounted adjacent to meter) M-5 (to city wastewater treatment plant) Display on flowmeter shows: Instantaneous flow Cumulative flow

33 C. Greyline Flowmeters (panels located in soft water building) (F-1, F-2, F-3) Upper display scrolls through: Maximum flow Cumulative flow Time remaining Lower display always shows: Instantaneous flow When taking flow measurements, check to make sure values are given in USGPM (U.S. Gallons Per Minute).

34 Operations and Maintenance Manual I-70 Greenfield Rest Area Sanitary Wetland System Appendix D System Alarms

35 I-70 Greenfield Rest Area Sanitary Wetland O&M Manual Appendix D May, 2004 System Alarms There are five alarms on the system associated with high water levels. Only one is located outside, and that is the high level alarm for the first septic tank. The other four alarms are located within the water softener building, and indicate high water in the various pump stations. These four alarms are activated when the water level rises above the pump on level but before it reaches the pump lag level where both pumps are automatically switched on. Additionally, there are system alarms associated with seal failure on the pumps in two of the four pump stations (LS-1 and LS-2). In the event that a seal failure is detected in a pump, the pump will automatically switch off, the control panel will direct all pumping calls to the other pump, and an alarm will sound. It is the same alarm that sounds during high water level events except a light on the panel will indicate pump seal failure. Finally, there are two system alarms associated with electrical surges to either pump on the four pump stations. The first is the line voltage alarm, which is triggered by unusually high or low voltage to the pumps. The second is the phase imbalance alarm, which is triggered by a phase imbalance in the voltage to the pumps. In either event, both pumps will automatically switch off and an alarm will sound. It is the same alarm that sounds during high water level events except a light on the panel will indicate either a line voltage or phase imbalance problem. The alarms inside the soft water building trigger both a flashing red light and an audible buzzer. The alarm outside near the septic tank is a buzzer only. When any alarm is activated, it will remain on until manually silenced. In the case of high water level in the dosing tanks, the pump lag float will activate after the alarm float and should bring the water level down. Depending on the amount of elapsed time between the start of an alarm and the investigation, inspection of the tank may reveal a normal water level. Further inspection to discover what caused the problem is necessary. In all cases, if an alarm sounds an entry should be added to the corresponding alarm log. This will help identify any recurring problems. If alarms are triggered frequently when they are not needed (e.g. a surge of water triggers the alarm even though one pump is capable of drawing the water level down a few seconds later) then the floats may be adjusted. All modifications should be noted in the log for future reference.

36 1. Alarm on wetland dosing pump station (LS-1) if red seal failure light is lit, indicates seal failure on corresponding pump. if line voltage or phase imbalance lights are lit, indicates voltage problem to pumps. otherwise indicates rising water level in dosing tank to wetland cells 1/2. possible high water causes: lead pump broken, lead pump switched off, lead pump not discharging enough to handle water flowing in, blockage in manifold is slowing pumping rate (increased head at outlet), lead pump clogged water level will rise and back up into ST-2 and ST-1. [panel label]: LS1 Panel B Circuit # Red light & buzzer indicate pump alarm Pump selector left = pump 1 only center = alternate right = pump 2 only Alarm control up = automatic center = off down = test Pump 1 Pump 2 Green lights indicate if corresponding pump is running Red lights indicate corresponding pump seal failure Voltage Monitor Panel Left = line voltage light Right = phase imbalance light Switches control each pump down = manually on up = automatic control center = manually off [panel location]: second from left inside soft water building

37 2. Alarm on recirculation pump station (LS-2) if red seal failure light is lit, indicates seal failure on corresponding pump if line voltage or phase imbalance lights are lit, indicates voltage problem to pumps. otherwise indicates rising water level in dosing tank to wetland cells 1/2. possible high water causes: lead pump broken, lead pump switched off, lead pump not discharging enough to handle water flowing in, blockage in manifold is slowing pumping rate (increased head at outlet), lead pump clogged in terms of elevation, the water will flow by gravity into ST-2 before backing up to the DBOX-1. the check valve after the pump should stop most flow to ST-2 there are valves on the pump that can be closed if it is imperative to stop flow to ST-2 as water backs up in DBOX-1, additional water will be directed to cell 3 instead of recirculating may submerge ACT-2 for a short period of time [panel label]: LS2 Panel B Circuit # Red light & buzzer indicate pump alarm Pump selector left = pump 1 only center = alternate right = pump 2 only Alarm control up = automatic center = off down = test Pump 1 Pump 2 Green lights indicate if corresponding pump is running Red lights indicate corresponding pump seal failure Voltage Monitor Panel Left = line voltage light Right = phase imbalance light Switches control each pump down = manually on up = automatic control center = manually off [panel location]: third from left in soft water building

38 3. Alarm on biofield dosing pump station (LS-3) alarm indicates rising water level in biofield dosing tank normal water level in tank is controlled by flow through outlet pipe to LS-4 rather than pump flow to biofield. alarm would likely indicate clog in pipe to LS-4 or high water levels in both LS-4 and wetland cell 3 rather than any pump problems pump does not have a lag float and will never be switched on by high water levels water will back up into wetland cell 3 or rise in both the cell and LS-4. short-term flooding in cell 3 is acceptable approximate excess capacity is 12,000 gallons. [panel label]: LS3 Red light & buzzer indicate pump alarm Pump selector left = pump 1 only center = alternate right = pump 2 only Dosing length & interval adjustment Alarm control up = automatic center = off down = test Pump 1 Pump 2 Green lights indicate if corresponding pump is running Switches control each pump down = manually on up = automatic control center = manually off [panel location]: first from left in soft water building

39 4. Alarm on effluent pump station (LS-4) if line voltage or phase imbalance lights are lit, indicates voltage problem to pumps. otherwise indicates rising water level in dosing tank to wetland cells 1/2. possible high water causes: lead pump broken, lead pump switched off, lead pump not discharging enough to handle water flowing in, blockage in manifold is slowing pumping rate (increased head at outlet), lead pump clogged water will back up into biofield dosing tank, which may set off high level alarm but will not trigger pump. therefore water will continue to backup into wetland cell # 3. short-term flooding in cell 3 is acceptable approximate excess capacity is 12,000 gallons. [panel label]: LS4 Panel B Circuit # Red light & buzzer indicate pump alarm Pump selector left = pump 1 only center = alternate right = pump 2 only Alarm control up = automatic center = off down = test Pump 1 Pump 2 Green lights indicate if corresponding pump is running Voltage Monitor Panel Left = line voltage light Right = phase imbalance light [panel location]: fourth from left inside soft water building External Alarm Silencer Switches control each pump down = manually on up = automatic control center = manually off

40 5. 4. Alarm on septic tank (ST-1) indicates rising water level in first septic tank possible problems: pump in LS-1 broken/off/discharging slowly, blockage in tank or piping between tanks is causing backup, blockage in septic filter is causing backup water will back up into both septic tanks and into the westbound rest area septic tanks may fill to overflowing ST-2 Filters ST-2 Inspection Port Zeus Zabel Alarm Switch for test, automatic, and off Vault for Flowmeter F-1 between ST-1 and ST-2 Looking west from ST-1

41 What to do when an alarm goes off: 1. Alarm on dosing tank LS-1 goes off A. Is pump seal failure lit? This alarm is triggered when water is detected within the sealed dry portion of the pump The pump needs to be serviced and the pump seal replaced Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). Switch the pump selector (orange box) to only call the working pump Switch the broken pump manually off (center position) Have the pump serviced Complete an entry in the pump alarm log B. Is line voltage or phase imbalance lights lit? This alarm is triggered when there are problems with the electrical feed or wiring and can be caused by thunderstorms. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). Turn off the circuit breakers to the pumps Reset the voltage monitor panel by turning the dial to manual reset and then back to auto reset with delay. Reset the circuit breakers to the pumps Ensure that the pumps are set for normal operation (pump selector on alternate, both pumps on automatic, alarm control on automatic ) Fill out an entry in the alarm log If the alarm goes off more than twice in a short period, have the pump panel serviced C. No lights are lit This indicates a high water level in the first dosing tank. Manually silence the alarm using the external pump silencer (on side of pump panel in water softener building). The light will continue to flash. Check the control panel to see if pumps are running (green lights) If no pump is running, water level may have reached alarm level and recovered already. o Go to dosing tank to verify that water level is below the top three floats. o o Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). If green lights indicate that one pump is running, go to the dosing tank to check the water level and verify that pump is running o If the pump does not appear to be running (no noise, no drop in water level) return to control panel, switch current pump to auto, and switch other pump on Continue to monitor the water level with the second pump on Troubleshoot original pump and have serviced if necessary When water level drops below alarm level, return to the control panel Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up).

42 o If one pump is running and the water level drops When water level drops below alarm level, return to the control panel Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). o If one pump is running and the water level is rising If water level rises enough to trigger pump lag, both pumps should turn on together. If not, turn them both on manually. When water level drops below alarm level, return to the control panel Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). If both pumps are running and the water level is rising o Consider bypassing flow around the wetland system. If there appears to be a problem with one of the pumps, notify the pump manufacturer for an inspection. When an alarm sounds, review the alarm log to check for recurring problems.

43 2. Alarm on dosing tank LS-2 goes off A. Is pump seal failure lit? This alarm is triggered when water is detected within the sealed dry portion of the pump The pump needs to be serviced and the pump seal replaced Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). Switch the pump selector (orange box) to only call the working pump Switch the broken pump manually off (center position) Have the pump serviced Complete an entry in the pump alarm log B. Is line voltage or phase imbalance lights lit? This alarm is triggered when there are problems with the electrical feed or wiring and can be caused by thunderstorms. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). Turn off the circuit breakers to the pumps Reset the voltage monitor panel by turning the dial to manual reset and then back to auto reset with delay. Reset the circuit breakers to the pumps Ensure that the pumps are set for normal operation (pump selector on alternate, both pumps on automatic, alarm control on automatic ) Fill out an entry in the alarm log If the alarm goes off more than twice in a short period, have the pump panel serviced C. No lights are lit This indicates a high water level in the recirculation dosing tank. High levels in the recirculation dosing tank will back water up into the flow distribution box and increase flow through the system into wetland cell 3 Therefore, it is okay for the water level to rise in the recirculation tank but it is important to know if either of the pumps is not working properly. Manually silence the alarm using the external pump silencer (on side of pump panel in water softener building). The light will continue to flash. Check the control panel to see if pumps are running (green lights) If no pump is running, water level may have reached alarm level and recovered already. o Go to dosing tank to verify that water level is below the top three floats. o o Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). If green lights indicate that one pump is running, go to the dosing tank to check the water level and verify that pump is running o If the pump does not appear to be running (no noise, no drop in water level) return to control panel, switch current pump to auto, and switch other pump on Continue to monitor the water level with the second pump on Troubleshoot original pump and have serviced if necessary When water level drops below alarm level, return to the control panel Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up).

44 o o If one pump is running and the water level drops When water level drops below alarm level, return to the control panel Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). If one pump is running and the water level is rising If water level rises enough to trigger pump lag, both pumps should turn on together. If not, turn them both on manually. When water level drops below alarm level, return to the control panel Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). If there appears to be a problem with one of the pumps, notify the pump manufacturer for an inspection. When an alarm sounds, review the alarm log to check for recurring problems.

45 3. Alarm on dosing tank LS-3 goes off This indicates a high water level in the biofield dosing tank. The biofield is dosed on a timer-based system and will not be affected by high water levels in the dosing tank. Water may back up into wetland cell 3. Short-term flooding in cell 3 is acceptable. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). Go to dosing tank to check water level If water level is higher than overflow to LS-4, check pumps in LS-4. When water levels drop below alarm level, return to control panel and ensure that both pumps are on automatic, the alarm is on automatic, and the pump call is set to alternate between the pumps Complete an entry in the LS-3 alarm log

46 4. Alarm on dosing tank LS-4 goes off A. Is line voltage or phase imbalance lights lit? This alarm is triggered when there are problems with the electrical feed or wiring and can be caused by thunderstorms. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). Turn off the circuit breakers to the pumps Reset the voltage monitor panel by turning the dial to manual reset and then back to auto reset with delay. Reset the circuit breakers to the pumps Ensure that the pumps are set for normal operation (pump selector on alternate, both pumps on automatic Fill out an entry in the alarm log If the alarm goes off more than twice in a short period, have the pump panel serviced B. No lights are lit This indicates a high water level in the effluent dosing tank, which pumps water from the end of the system to the city lift station. Manually silence the alarm using the external pump silencer (on side of pump panel in water softener building). The light will continue to flash. Check the control panel to see if pumps are running (green lights) If no pump is running, water level may have reached alarm level and recovered already. o Go to dosing tank to verify that water level is below the top three floats. o o Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). If green lights indicate that one pump is running, go to the dosing tank to check the water level and verify that pump is running o If the pump does not appear to be running (no noise, no drop in water level) return to control panel, switch current pump to auto, and switch other pump on Continue to monitor the water level with the second pump on Troubleshoot original pump and have serviced if necessary When water level drops below alarm level, return to the control panel Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). o o If one pump is running and the water level drops When water level drops below alarm level, return to the control panel Complete an entry in the alarm log. Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). If one pump is running and the water level is rising If water level rises enough to trigger pump lag, both pumps should turn on together. If not, turn them both on manually. When water level drops below alarm level, return to the control panel Complete an entry in the alarm log.

47 Manually reset the alarm at the control panel by toggling the alarm control switch off (center position) and back to automatic (up). If there appears to be a problem with one of the pumps, notify the pump manufacturer for an inspection. When an alarm sounds, review the alarm log to check for recurring problems.

48 5. Alarm on septic tank goes off This indicates a high water level in the septic tanks. Manually reset the alarm by toggling the alarm control switch off (center position) and back to automatic (up). (switch is located on alarm near flowmeter between the two tanks). Open the inspection ports on each septic tank to view the water level. If not overflowing, open the wetland dosing tank to view the water level. o The water level in the wetland dosing tank should also be high and should have o triggered a pump to run. In the event that the wetland dosing tank water level is not high, there is probably a clog somewhere in the septic tank system. Inspect the tanks and flowmeter and unclog the system. At least one pump in the wetland dosing tank should be running. If the water level is high and the pumps are not running, go to control panel (within soft water building) and switch one pump on manual In the event that the tanks are overflowing, change water flow to bypass system

49 LS-1 (Wetland Dosing Tank) Alarm Log Alarm Type Date & Time Responder Problem Resolution/Comments Alarm types High Water, Pump 1 Seal Failure, Pump 2 Seal Failure, Line Voltage, Phase Imbalance

50 LS-2 (Recirculation Dosing Tank) Alarm Log Alarm Type Date & Time Responder Problem Resolution/Comments Alarm types High Water, Pump 1 Seal Failure, Pump 2 Seal Failure, Line Voltage, Phase Imbalance

51 LS-3 (Biofield Dosing Tank) Alarm Log Alarm Type Date & Time Responder Problem Resolution/Comments Alarm types High Water

52 LS-4 (Effluent Dosing Tank) Alarm Log Alarm Type Date & Time Responder Problem Resolution/Comments Alarm types High Water, Line Voltage, Phase Imbalance

53 Septic Tank Alarm Log Alarm Type Date & Time Responder Problem Resolution/Comments High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water High water

54 Operations and Maintenance Manual I-70 Greenfield Rest Area Sanitary Wetland System Appendix E Sludge Volume Chart

55 DIPSTICK READING XERXES CORPORATION Dipstick Calibration Chart 10,000 Gallon - 8' Diameter SW & DWT-I Tank DIPSTICK READING DIPSTICK READING DIPSTICK READING DIPSTICK READING DIPSTICK READING GALLONS GALLONS GALLONS GALLONS GALLONS GALLONS 1/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / XERXES CORPORATION 7901 XERXES AVENUE SOUTH, MINNEAPOLIS, MN (952)

56 DIPSTICK READING XERXES CORPORATION Dipstick Calibration Chart 10,000 Gallon - 8' Diameter SW & DWT-I Tank DIPSTICK READING DIPSTICK READING DIPSTICK READING DIPSTICK READING DIPSTICK READING GALLONS GALLONS GALLONS GALLONS GALLONS GALLONS 42 1/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / XERXES CORPORATION 7901 XERXES AVENUE SOUTH, MINNEAPOLIS, MN (952)

57 DIPSTICK READING XERXES CORPORATION Dipstick Calibration Chart 10,000 Gallon - 8' Diameter SW & DWT-I Tank DIPSTICK READING DIPSTICK READING DIPSTICK READING GALLONS GALLONS GALLONS GALLONS 84 1/ / / / / / / / / / / / / / / / / / / / / / / / / / / / DIPSTICK READING GALLONS DIPSTICK READING GALLONS / / / / / / / / / / / / / / / / / / / / / XERXES CORPORATION 7901 XERXES AVENUE SOUTH, MINNEAPOLIS, MN (952)

58 Operations and Maintenance Manual I-70 Greenfield Rest Area Sanitary Wetland System Appendix F Air Release Valve Maintenance

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