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In a typical STEP system,household sewage is pretreated in a septic tank where gross solids and grease are held back.A"clear" <br /> effluent from the mid-depth of the tank is conveyed to a common sewer.Usually the effluent is pumped from the septic tank under <br /> pressure to a small-diameter,pressurized collector sewer. <br /> Effluent may also flow by gravity,where terrain allows,to small-diameter gravity collector lines.This type of STEP system is often <br /> called a STEG(septic tank effluent gravity)or STED(septic tank effluent drain)system to distinguish it from pumped systems. <br /> However,these guidelines and criteria apply to both. <br /> SCOPE <br /> A STEP/STEG systeir.is considered to include all of its components beginning with the septic tanks,and ending at the points)of <br /> discharge into a conventional gravity sewer or treatment plant.Building drains discharging into tanks are regulated under the Oregon <br /> State Plumbing Code,and are not considered part of a STEP system. <br /> ADMINISTRATIVE REQUIREMENTS <br /> All additions and extensions to existing STEP(or STEG)systems,as well as new systems,are subject to review and approval per <br /> OAR 340-52.Submittals should document fulfillment of administrative requirements by the sewer system Owner. <br /> The OWNER is defined as the municipality,sanitary district,private sewage utility,or sanitary authority which.is responsible for the <br /> operation of the system.The property being served is defined as the USER. <br /> Legal title to tanks,pumps,or other components should preferably be"owned"by the OWNER."The objective of vesting title in the <br /> OWNER instead of the USER is to avoid potential for cost disputes over equipment selection and repair methods.Having the USER <br /> "Own"title to any of the system components may be considered on a case-by-case basis,but is not recommended. <br /> Regardless of where title is vested,the OWNER shall completely control all tanks,pumps,service lines,and other components of the <br /> system on private property.This requirement is essential to assure operable hydraulics and overall system reliability.The <br /> administrative requirements are: — <br /> 1.The OWNER shall maintain ultimate responsibility and authority for design,equipment and materials selection, <br /> installation,operation,and maintenance of the entire STEPISTEG system including tanks,controls,and other <br /> appurtenances on private property.The OWNER may contract these services with qualified contractors.Assigning <br /> any of them to a USER is not acceptable. <br /> 2.The OWNER shall possess a recorded general easement or deed restriction to enter the private property being <br /> served,and to access the system and its components.Access must be guaranteed to operate,maintain,repair,restore <br /> service,and remove sludge. <br /> 3.No system shall be operated without the direct field supervision of a certified operator,in accordance with OAR <br /> 340-49.An operations and maintenance manual shall be submitted for review prior to startup.In accordance with <br /> OAR 340-52,no STEP/STEG system shall be operated without an approved manual. <br /> 4.OWNERS shall maintain and operate STEP/STEG facilities without any interruption,sewage spills on the <br /> ground.,sewage backup into buildings,or other unhealthy conditions.OWNERS shall establish operating procedures <br /> and maintain certified staff to assure: <br /> ■Timely response to outages and trouble calls. <br /> ■Adequate spare parts on hand including spare pumps,piping,electrical controls,and valves. <br /> Equipment should be standardized to reduce spares.Inventory shall include,at a minimum: <br /> ■1 spare of each type of pumping unit per 15 customers served. <br /> ■1 spare control panel per 30 customers. <br /> ■1 spare set of level controls per 30 customers. <br />