I couldn't give you a definant answer on either question, but I can tell you this much.
It doesn't test as a positive for PCP despite being an analog. I work for a lab that preforms urine analysis and here are the drugs that are commonly tested for:
Marijuana, cocaine, opiates, proproxyphene benzos, barbs, PCP and amphetamines.
I've seen ecstasy, LSD, methadone and psilocybin tested specially.
I've never seen anything for ketamine, so you should be fine. A few years ago this same lab used to test *my* urine.. infact about 70-80 samples of it.. including times I was under the effects of ketamine while giving my urine and I never tested positive for it. I used to take it at my weekly rehab meetings just to spite the counselor.