The following tables are necessary for the proper location, planning, construction, and installation of an on-site sewage facility (OSSF).

1. (1) Table I. Effluent Loading Requirements Based on Soil Classification.
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2. (2) Table II. Septic Tank and Aerobic Treatment Unit Sizing.
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3. (3) Table III. Wastewater Usage Rate.
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4. (4) Table IV. Required Testing and Reporting.
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5. (5) Table V. Criteria for Standard Subsurface Absorption Systems.
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6. (6) Table VI. USDA Soil Textural Classifications.
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7. (7) Table VII. Yearly Average Net Evaporation (Evaporation-Rainfall).
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8. (8) Table VIII. OSSF Excavation Length (3 Feet in Width or Less).
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9. (9) Table IX. OSSF System Designation.
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10. (10) Table X. Minimum Required Separation Distances for On-Site Sewage Facilities.
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11. (11) Table XI. Intermittent Sand Filter Media Specifications (ASTM C-33).
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12. (12) Table XII. OSSF Maintenance Contracts, Affidavit, and Testing/Reporting Requirements.
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13. (13) Table XIII. Disposal and Treatment Selection Criteria.
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Source Note:The provisions of this §285.91 adopted to be effective February 5, 1997, 22 TexReg 1114; amended to be effective June 13, 2001, 26 TexReg 4115; amended to be effective December 17, 2001, 26 TexReg 10363; amended to be effective September 11, 2008, 33 TexReg 7536; amended to be effective December 27, 2012, 37 TexReg 9947; amended to be effective July 6, 2023, 48 TexReg 3508.