Figure: 30 TAC 285.91(9)

Table IX. OSSF System Designation.

SYSTEM DESCRIPTION

SYSTEM TYPE

PLANNING MATERIAL TO BE PREPARED BY R.S. or P.E.2

INSTALLER REQUIREMENTS

Septic Tank & Absorptive Drainfield

Standard

No

Class I or II

Septic Tank & ET Drainfield (Unlined)

Septic Tank & ET Drainfield (Lined)

Standard

Standard

No

No

Class I or II

Class II

Septic Tank & Pumped Drainfield

Standard

No

Class I or II

Septic Tank & Leaching Chamber

Proprietary

No

Class I or II

Septic Tank & Gravelless Pipe

Proprietary

No

Class I or II

Septic Tank & Low Pressure Dosing

Non-standard

Yes

Class II

Septic Tank & Absorptive Mounds

Non-standard

Yes

Class II

Septic Tank & Soil Substitution

Non-standard

Yes

Class I or II

Septic Tank, Secondary Treatment, Filter & Surface Application

Non-standard

Yes

Class II

Aerobic Treatment & Standard Absorptive Drainfields

Proprietary

Yes

Class II

Aerobic Treatment & ET Drainfield

Proprietary

Yes

Class II

Aerobic Treatment & Leaching Chamber

Proprietary

Yes

Class II

Aerobic Treatment & Gravelless Pipe

Proprietary

Yes

Class II

Aerobic Treatment, Filter & Drip Emitter

Proprietary

Yes

Class II

Aerobic Treatment & Low Pressure Dosing

Proprietary

Yes

Class II

Aerobic Treatment & Absorptive Mounds

Proprietary

Yes

Class II

Aerobic Treatment & Surface Application

Proprietary

Yes

Class II

Any Other Treatment System

---

Yes

Class II

Any Other Subsurface Disposal System

---

(1)

(1)

Any Other Surface Disposal System

---

Yes

Class II

Non-Standard Treatment when Secondary Treatment Required

Non-Standard

Engineer Only

Class II

Holding Tank

---

No

Class I or II

(1) Determined by the executive director based upon review required by 285.5(b)(2) of this Chapter (relating to submittal requirements for planning materials).
(2) The site evaluation is required to be performed by either a site evaluator or a professional engineer.