this is a post-accident test... how do you its not going to be supervised thats really my main concern
Unless you were seriously injured (incapacitated) in the accident to where youre unable to submit a sample on your own, or If you had been suspected of tampering, you wont be observed.

I believe this is also going to be an off-site testing (some clinic or medical facility) So having a microwave to heat the pee probably is not going to be happening

If collection takes place off-site, this is a good thing if you're not accompanied by another job supervisor. On the way to the "drop site", you could always stop at any convenient store and use their mic. :smokin: