| as part of the inlet bung | 3 | other |
| to accommodate pumping | 3 | purpose |
| with lids at grade level | 2 | other |
| tank → have → riser | 11 |
| negative | neutral | positive |
| 0.076 | 0.774 | 0.150 |
| Raw frequency | 11 |
| Normalized frequency | 0.209 |
| Modifier score | 0.700 |
| Perplexity | 199.651 |