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23 Paul W. Donoho, R.E.H.S. #6227 (530) 701-9972 AdvahTexO 01, M MANUAL COMMERCIAL TREATMENT SYSTEMS Maintenance • • Quarterly Maintenance Semi-Annual Maintenance Testing for Biochemical Oxygen Demand(BOD);Total Suspended Solids Inspect the spray of the {TSS);Fats,Oils,and Grease(FOG);Ammonia(NHS;Nitrate(NO);and nodes in the Advanl pH should he done according to regulatory requirements.If testing is pods.Look for reduced not required by the regulatory jurisdiction,samples should be taken or uneven spray patterns quarterly for the first year to establish a baseline.Subsequent testing as well as clogged spray after the first year may be reduced based on the establishment of this nozzles or biological baseline.Regular samples will provide valuable informaton for ongoing growth on the spray maintenance and froubleshooting.Effluent testing procedures may be nozzles.Observe and found in the residential Advanrex 0&M Manual in Appendix B.All results measure the residual obtained should be reported to the appropriate people,including Orenco's pressure.Refer back to Engineered Systems Department, the Start-up&Operation For the first year only,check voltages and amperages of all pumps and section for initial record them on the Field Maintenance Report Form provided in Appendix measurements of residual pressure.If the observed residual pressure B.Refer to the start-up voltages and amperages recorded in the"Start- exceeds the initial residual pressure(3 psi)more than 15-20%,it can be up&Operation'section of this document.If the voltage drop or the assumed that some of the nozzles are plugged and the laterals require amperage exmods National Electric Code(NEC)requirements(see chart flushing.To flush the laterals,open the ball valves at the end of one lateral. provided in'Inspection Points—Pumps"section of this document),have At the control panel,toggle the"AUTO-OFF-MAN'switch to'MAN"and let an electrician verify the service line and check the pump windings.If there the pump run to flush any material from the lateral.Repeat for each lateral is no discernible difference in voltage or amperage,this procedure may be until all of the laterals have been flushed.Recheck the residual pressure performed annually. to ensure the laterals have been sufficiently cleared. If there is still a significant difference in initial and current residual pressure,use an OrencoAX lateral cleaning brush or a high-pressure washer to clean the laterals. To clean out the spray nozzles,turning the laterals so the spray nozzle turbines are pointed up and then hosing each turbine off.For excessive buildup in the spray nozzles,remove the nozzles and replace them with clean nozzles.Soak the plugged nozzle in TSP or any other approved cleaning agent for 30 minutes.When a spray nozzle is clear,you can see the spray nozzle turbine spin freely and the spray distribute evenly across the textile media.If the nozzles are substantially plugged after six months,then it may be prudent to inspect the residual pressure every three months and adjust scheduled testing and flushing of the laterals accordingly. Visually inspect the recirculating valve and verify that the liquid level in the tank is within the normal range.Consult the design plans for proper operating level.If the liquid level is low,the ball mechanism could be jammed in the seated position.Remove,disassemble,and inspect.It the liquid level is high,the valve may require cleaning because it is not making a tight seal when seated.Remove,disassemble,and inspect. Capyrlghf Oreoco systems®,Inc.Pmimrry of Orenco Systems",Inc.Do not reproduce or distribute whhoet written aufhoriza5on from Orenco:800-348-9543. • AIM-010-M-3,Rev.2.1,05115