Wells - Confirming the Unseen
So I've got a well that was drilled in 1971, has unusually thick steel casing (0.35") and was intended to supply a community waterworks that was until some put rocks in it. So I had the bore hole redrilled and even scoped with a submergible camera. I even ran 10 bacteria tests on this well...all negative for coliform bacterias. My dear health department is saying I can't use it unless I can very at least 50' of grout and 2" annular space per their regulations.
How can I determine the grouting specifications? Technology like sonar, gamma...others? I can tell you the well report says 80' of soil and it is cased to 100'...so you would likely be looking for cement surrounded by soil and perhaps water ( well is flowing artesian). I find it absurd that a well that is far more robust than pvc or 0.180" steel cased wells others have and has a record of bacteria free water could be rejected simply b/c grouting specs. So what can one do?