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� <br /> � e. All tanks must be waterti t. Tanks should come from the manufacturer <br /> S� <br /> with a tank/riser adapter precast. <br /> � 3. Lift Tank <br /> � a. 1,000 gallon single compartment precast concrete lift tank <br /> b. All pipe connections must be watertight. Tanks must have cast in place <br /> � rubber grommets in the inlet and outlet openings. <br /> c. Install according to manufacturer's recommendations. <br /> �� <br /> � d. All tanks must be watertight. Tanks should come from the manufacturer <br /> with a tank/riser adapter precast. <br /> � 4. Drain Field Lift Pumps <br /> � a. High head e�luent pump that will deliver a minimum of 38 gallons per <br /> minute with a total dynamic head of 38 feet. <br /> � b. Install effluent pump within a screened pump vault. <br /> c. Extend 2" sch 40 PVC discharge pipe from top of pump through riser. <br /> Install a 2" camlock to disconnect pump in line between the puxnp and <br /> � riser. The camlock must be within reach of the ground surface. <br /> d. Drill a 3/16" hole in the dischazge pipe at the elbow or other lowest point <br /> � to allow for pipe drain back. <br /> e. Use mercury floats to control pump operation and provide a high level <br /> � alarm. <br /> 5. Risers <br /> � a. 24" diameter heav du corru ated PVC i e extended to 2-3" above <br /> Y tY g P P <br /> finished grad'e. ' <br /> � b. Attached all risers to tank adapter with adhesive and waterproofing agent. <br /> � 6. Riser Covers <br /> a. Use insulated fiberglass covers with rubber gasket and 2" of polystyrene <br /> � for each riser. Attach riser cover to riser with stainless steel bolts or <br /> screws. <br /> � <br /> � <br /> �+ 3 <br />