| Tank Size Gallons | Number of People in Household | |||||
 1 | 2 | 3 | 4 | 5 | 6 | |
| Years Between Pumping | ||||||
| 750 | 9 | 4 | 2.5 | 1.5 | 1 | - |
| 1000 | 12.5 | 6 | 4 | 2.5 | 1.5 | 1 |
| 1250 | 15.5 | 7.5 | 4.5 | 3.5 | 2.5 | 2 |
| 1500 | 19 | 9 | 6 | 4 | 3 | 2.5 |
| Tank Size Gallons | Number of People in Household | |||||
1 | 2 | 3 | 4 | 5 | 6 | |
| Years Between Pumping | ||||||
| 750 | 9 | 4 | 2.5 | 1.5 | 1 | - |
| 1000 | 12.5 | 6 | 4 | 2.5 | 1.5 | 1 |
| 1250 | 15.5 | 7.5 | 4.5 | 3.5 | 2.5 | 2 |
| 1500 | 19 | 9 | 6 | 4 | 3 | 2.5 |