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Numbers of snails removed by washing alone and numbers removed by washing and rinsing.
| Location of Lettuce | Numbers of snails removed | |||||||
| Tap Water | Bleach | Vinegar | Salt | |||||
| After wash | After wash + rinse | After wash | After wash + rinse | After wash | After wash + rinse | After wash | After wash + rinse | |
| Center | 2 | 17 | 0 | 15 | 2 | 10 | 1 | 13 |
| Inner | 8 | 22 | 2 | 20 | 11 | 23 | 6 | 22 |
| Outter | 22 | 24 | 20 | 24 | 24 | 24 | 23 | 24 |
