It could mean nothing, I take lots of contracts with silly crap like that in it and nothing ever comes from it… but there have been a few memorable times when the goofy engineer who wrote that crap showed up to follow through, or even worse some over zealous GC felt like he had to enforce every last letter of the specs when the engineer and owner were happy with the project.
My feeling is, that is this is a “green house” project and there is a real potential that you may have to go through this test should you get the project, then make sure there is enough money in your proposal to cover the headache.
On a side note I was not aware that NEC says this, it sounds like some egg head made it up:
“Any elevated magnetic fields greater than .5 miligauss will indicate the presence of a code violation or that wiring has been damaged during the construction”
