Separation Distances
To the Editor:
Many of us enjoy learning from others’ mistakes: it is better than learning from our own errors. In your December article (“Where the Works Gets Done”) about the fundamentals of onsite treatment, the main photo of the trench (and tree) caught my eye. I was thinking perhaps the article would tell of a failure scenario.
The picture reminded me of the visual puzzles I would see as a kid: What is wrong with this picture? I looked at the tree abutting the trench and envisioned difficulties in years to come: tree root damage, the tree coming down at an inappropriate time, the uprooted tree causing damage to












