Figure: 30 TAC §285.91(10)
Table X. Minimum Required Separation Distances for On-Site Sewage Facilities.
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TO |
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FROM |
Tanks |
Soil Absorption Systems, & Unlined ET Beds |
Lined Evapotranspiration Beds |
Sewer Pipe With Watertight Joints |
Surface Application (Edge of Spray Area) |
Drip Irrigation |
|
Public Water Wells2 |
50 |
150 |
150 |
50 |
150 |
150 |
|
Public Water Supply Lines2 |
10 |
10 |
10 |
10 |
10 |
10 |
|
Wells and Underground Cisterns |
50 |
100 |
50 |
20 |
100 |
100 |
|
Private Water Line |
10 |
10 |
5 |
105 |
No separation distances |
10 |
|
Wells (Pressure Cemented or Grouted to 100 ft. or Pressure Cemented or Grouted to Watertable if Watertable is Less Than 100 ft. deep) |
50 |
50 |
50 |
20 |
50 |
50 |
|
Streams, Ponds, Lakes, Rivers, Creeks (Measured From Normal Pool Elevation and Water Level); Salt Water Bodies (High Tide Only) |
50 |
75, LPD (Secondary Treatment & Disinfection) - 50 |
50 |
20 |
50 |
25 when Ra< 0.1 |
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Foundations, Buildings, Surface Improvements, Property Lines, Easements, Swimming Pools, and Other Structures |
5 |
5 |
5 |
5 |
No Separation Distances Except: |
No Separation Distances Except4: |
|
Slopes Where Seeps may Occur |
0 |
25 |
5 |
10 |
25 |
10 when Ra< 0.1 |
|
Edwards Aquifer Recharge Features (See Chapter 213 of this title relating to Edwards Aquifer)3 |
50 |
150 |
50 |
50 |
150 |
100 when Ra< 0.1 |
1. All distances measured in feet, unless otherwise indicated.
2. For additional information or revisions to these separation distances, see Chapter 290 of this title (relating to Public Drinking Water).
3. No OSSF may be installed closer than 75 feet from the banks of the Nueces, Dry Frio, Frio, or Sabinal Rivers downstream from the northern Uvalde County line to the recharge zone.
4. Drip irrigation lines may not be placed under foundations.
5. Private water line/wastewater line crossings should be treated as public water line crossings, see Chapter 290 of this title (relating to Public Drinking Water).
6. Separation distance may be reduced to 10 feet when sprinkler operation is controlled by commercial timer. See §285.33(d)(2)(G)(i).