I don't understand why people keep buying arborvitaes. They're a gorgeous tree, but I have YET to see them thrive anywhere! Most of the time, they just hang on for dear life.. but more often than not they're dead. And I understand being on a well. My parent's house in NM sits on a well that has feeds off of an underground river.. they have over 100' of water constantly flowing under them. Kinda creepy thing is that the house is actually built above a massive cavern (hydrogeologist who did the survey estimated about 250-275ft hollow under a 10' base that the house sits on). One time I was goofing off in the garage (dirt floor) and stomped both feet as hard as I could. I could hear an echo! Scared the snot outta me!
It's still dripping outside right now. We may see 1/2" with as slow/tiny as the drizzle is, but I don't care! it's soaking right in!!