Figure: 30 TAC §285.91(1)

**EFFLUENT LOADING REQUIREMENTS BASED ON SOIL CLASSIFICATION**

SOIL CLASS (Refer to Table VI) | LONG TERM APPLICATION (R_{a})*GALLONS PER ABSORPTIVE AREA (SF) PER DAY |

Ia | >0.50 |

Ib | 0.38 |

II | 0.25 |

III | 0.20 |

IV | 0.1 |

- The absorptive area consists of the bottom area of the excavation
**PLUS**one foot of sidewall area around the full perimeter of the excavation.

The required absorptive area shall be calculated by the following formula:

ABSORPTIVE AREA = Q/R_{a}, Where Q is the wastewater usage rate in gallons per day (see Table III, Relating to Wastewater Usage Rate).