(b)

1. (1) Where a pump or dosing siphon is used to dose an onsite wastewater system, it shall have a capacity sufficient to deliver the required dose volume.

2. (2) Pump controls shall:

   1. (A) Operate automatically; and
   2. (B) Be sufficiently adjustable to deliver the required dose volume.

(c)

1. (1) Only effluent quality pumps shall be utilized in dosing applications.
2. (2) Dewatering and grinder pumps are not approved for septic applications.

(d)

1. (1) Dosing systems that incorporate a reduction in the transport piping diameter at the final point of dispersal or the use of flow reduction orifices shall require an authorized effluent filter device or method.
2. (2) Effluent shall be dosed to the absorption area at a rate not greater than twenty-five percent (25%) of the estimated daily usage outlined in Appendix B of this part.

(f) Stand-alone dosing tanks shall have:

1. (1) A capacity sufficient to contain the required dose;
2. (2) Storage for ballast not less than one-quarter (1/4) of the dose tank capacity; and
3. (3) Emergency storage above the high-water alarm not less than one-third (1/3) of the estimated daily usage.

(g) The compartment of combination tanks used for dosing shall:

1. (1) Have a capacity sufficient to contain the required volume; and
2. (2) Be hydraulically isolated from the primary compartment.

(h)

1. (1) Pre-cast dosing tanks shall meet the same construction and testing requirements for pre-cast septic tanks outlined in 14 CAR § 21-907.
2. (2) The approval of any distribution device utilized in dosing situations shall be at the sole discretion of the department or its authorized agent.

(j) Dosing utilizing a filtered pump vault.

1. (1) When dosing from a single compartment septic tank, the tank capacity shall be increased by not less than two hundred fifty (250) gallons above that specified in Appendix C of this part.
2. (2) The filtered pump vault shall be securely mounted to the tank in a manner that prevents movement of the vault during operation.
3. (3) The minimum horizontal separation between the inlet baffle of the septic tank and the filtered pump vault shall be three feet (3’).
4. (4) When a system is dosed from a single compartment septic tank, the drawdown per dose cycle shall not be greater than three inches (3”).

(k) Dosing utilizing a solids handling pump basin.

1. (1)

   1. (A) Solids handling pump basins used in conjunction with an individual onsite wastewater system require approval by the department prior to any use or installation.
   2. (B) Macerating or grinder pump basins are not covered by this section.

2. (2) The pump basin shall be constructed of a durable material such as:

   1. (A) Concrete;
   2. (B) High-strength plastic;
   3. (C) Fiberglass; or
   4. (D) Other authorized material.
3. (2) The bottom of the pump basin shall be solid and structurally capable of supporting the solids handling pump.

4. (3)

   1. (A) The pump basin shall have a gas-tight removable lid or cover.
   2. (B) The lid or cover shall be structurally capable of supporting the weight of the load it will receive based on the location of the pump basin.
5. (4) The pump basin shall be properly vented.

6. (5)

   1. (A) The pump basin shall be properly sized to receive or contain no more than twelve (12) hours of normal discharge or one-half (1/2) of the daily flow rate, whichever is the smallest.
   2. (B) Additionally, the pump basin shall be sized so when the pump is activated the pump will operate for a minimum of fifteen (15) seconds.
7. (6) Minimum structural dimensions of eighteen inches (18”) in diameter and twenty-four inches (24”) in depth.
8. (7) The pump basin shall incorporate in its design a means to prevent floating during any given period of low effluent levels within the basin.
9. (8) Each pump basin shall contain as part of the pump discharge assembly a full-open valve and a check valve.
10. (9) The effluent level control device or floats shall be adjusted and maintained at all times to prevent the effluent in the pump basin from rising within two inches (2”) of the invert of the building drain inlet into the basin.
11. (10) Solids handling pumps used with this type of basin shall be capable of handling spherical solids with a diameter of up to and including two inches (2”).

12. (11) Solids handling pumps shall:

    1. (A) Be sized to provide for peak flow events; and
    2. (B) Provide a full flow velocity of at least two feet (2’) per second in the discharge piping.
13. (12) Solids handling pump and basin shall be equipped with an audio and visual alarm.

(l) Electrical connections.

1. (1) Electrical connections shall be complete at the time of final system inspection unless otherwise specified by the department’s authorized agent.
2. (2) System wiring shall be encased in electrical conduit.

3. (3)

   1. (A) Splices within system wiring shall be made with heat shrink connectors or waterproof wire nuts.
   2. (B) System wiring may use control floats and/or pump electrical leads of such length allowing connections at remote control panel location.
4. (4) Electrical connections which terminate shall be in internal and/or external splice boxes and shall be of watertight construction.
5. (5) Conduit and connection boxes shall be sealed with electrical grease or other waterproof electrical sealant in order to minimize corrosion due to moisture and/or gasses escaping the system.
6. (6) System wiring shall comply with the Arkansas electrical code.
7. (7) Pumps and pump alarms shall not be on the same circuit.