11.120.030 General arrangement.
(a) The submersible, nonclog pumping station shall consist of:
(1) A wetwell to receive, screen and store the wastewater for a brief period before it is pumped and to house the submersible pumps;
(2) A vault near the wetwell to house the discharge piping, valves and flow meter; and
(3) Weatherproof, aboveground cabinets to house the electrical power, station controls, air analyzer, instrumentation, standby generator controls and communications equipment.
(b) The submersible grinder pumping station shall consist of:
(1) A wetwell to receive and store the wastewater for a brief period before it is pumped and to house the grinder pumps;
(2) A vault near the wetwell to house the discharge piping, valves and flow meter; and
(3) Weatherproof, aboveground cabinets to house the electrical power, station controls, air analyzer, instrumentation, standby generator controls and communications equipment.
(c) A backflow preventer assembly on the water service shall be located above grade near the valve vault.
(d) A site plan showing the general arrangement is shown on Drawings DG-08-02 and DG-08-02A. However, rearrangement may be required depending on site conditions and alignments of incoming sewer line and the forcemain. (Design Guideline DG-08 § 3.0, dated August 2006)