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11312 Submersible Wastewater Pumps and Accessories <br /> fasteners that can be removed with standard tools, such as pliers or crescent <br /> wrenches, are not considered tamper-resistant. To prevent a tripping hazard, fasteners <br /> shall not extend above the surface of the lid. <br /> 6. Riser Installation: Riser installation shall be accomplished according to the <br /> manufacturer's instructions. <br /> C. HOLDING TANK EFFLUENT PUMPING ASSEMBLIES: <br /> For Commercial or Multiple-User Tanks <br /> All pumping systems shall be supplied by a reputable manufacturer with at least five (5) <br /> years of experience in supplying equipment for effluent sewers. References must be <br /> available on request from the engineer. Systems shall be Orenco Systems®, Inc. High- <br /> Head Pumping Assemblies or engineer-approved equal, composed of: <br /> 1. Risers & Lids: Same as section B, 1 through 6, above. <br /> 2. Pump Vault: Orenco Systems, Inc. Model PVU Series, Universal Biotube® Pump <br /> Vault or engineer-approved equal, installed in conformance with the engineer's plans. <br /> The filter shall have a minimum effective screen area of no less than 19.6 square feet. <br /> The Biotube Pump Vault shall consist of a 12-inch diameter HDPE vault with eight <br /> (8) 2-inch diameter holes evenly spaced around the perimeter, located appropriately <br /> to allow for maximum sludge and scum accumulation before requiring pumping <br /> (approximately 70% of minimum liquid level). Housed inside the polyethylene vault <br /> shall be the Biotube assembly consisting of 1/8-inch mesh polypropylene tubes. <br /> Attached to the vault is a flow inducer to accept one or two high-head effluent pumps. <br /> 3. Discharge Hose and Valve Assemblies: Orenco Systems®, Inc. Model HV12513C, 1- <br /> 1/4-inch diameter, 150 psi PVC ball valve, 150 psi PVC check valve, PVC flex hose <br /> with working pressure rating of 80 psi,and Schedule 40 PVC pipe. <br /> 4. Float Switch Assembly: Orenco Systems®, Inc. Model MF4A with four switch floats <br /> mounted on a PVC stem attached to the filter cartridge. The floats must be adjustable <br /> and must be removable without removing the pump vault. The high- and low-level <br /> alarms and on/off functions shall be preset as shown in the engineer's plans. Each <br /> float lead shall be secured with a nylon strain relief bushing at the splice box. The <br /> floats shall be UL or CSA listed and shall be rated for a minimum of 5.OA @ 120 <br /> VAC. <br /> 5. High-Head Effluent Pumps: For most applications, an Orenco Systems®, Inc. Model <br /> P200511, 1/2 hp, 115 VAC, single phase, 60 Hz, two-wire motor, with 10 foot long <br /> extra heavy duty (SO) electrical cord with ground. Pump shall be capable of <br /> providing a flow rate of 20 gpm against a head of 105 feet. Pump shall be UL and <br /> CSA listed as an effluent pump. Pump shall be provided with a non-prorated five-year <br /> warranty. <br /> 6. Electrical Splice Boxes: Orenco Systems®, Inc. Models S136, UL approved for wet <br /> locations, equipped with six electrical cord grips and a 1" outlet fitting. Also included <br /> shall be UL listed waterproof butt splice connectors. Substitute Model S134, equipped <br /> with four electrical cord grips and a 3/4"outlet fitting and Model SBX-D for Class 1, <br /> Division 1 applications. <br /> Micke Grove Zoo Wash Water and Septic Disposal System 11312-5 <br /> Siegfried Engineering, Inc. <br /> MESA Project LOCA 0701 <br />