Figure: 30 TAC 285.91(8)

Table VIII. OSSF Excavation Length (3 Feet in Width or Less).

 Excavation Length (Feet) Soil Class Ib Soil Class II Soil Class III Daily Sewage Flow (Q)2 For 1.5 Foot Excavation Width3 For 2.0 Foot Excavation Width For 3.0 Foot Excavation Width For 1.5 Foot Excavation Width3 For 2.0 Foot Excavation Width For 3.0 Foot Excavation Width For 1.5 Foot Excavation Width3 For 2.0 Foot Excavation Width For 3.0 Foot Excavation Width 100 75 66 53 114 100 80 143 125 100 125 94 82 66 143 125 100 179 156 125 150 113 99 79 171 150 120 214 188 150 180 135 118 95 206 180 144 257 225 180 200 150 132 105 229 200 160 286 250 200 225 169 148 118 257 225 180 321 281 225 240 180 158 126 274 240 192 343 300 240 275 207 181 145 314 275 220 393 344 275 300 226 197 158 343 300 240 429 375 300 325 244 214 171 371 325 260 464 406 325 360 271 237 189 411 360 288 514 450 360 375 282 247 197 429 375 300 536 469 375 400 301 263 211 457 400 320 571 500 400 420 316 276 221 480 420 336 600 525 420 450 338 296 237 514 450 360 643 563 450 475 357 313 250 543 475 380 679 594 475 500 376 329 263 571 500 400 714 625 500

1. To determine excavation lengths, greater than 3 feet in width or where the area and width are known, use the formulas provided in §285.33(b)(1)(A)(vii).
2. To determine excavation lengths (3 feet or less in width, but greater than or equal to 1.5 feet in width) for daily sewage flows (Q) not provided in this table, use the formula provided in §285.33(b)(1)(A) (vii)(III).
3. Minimum excavation width is 1.5 feet for all excavation lengths.