Wally-13

Hi all. I am new to this forum so bear with me. We have a 1999 Acura CL 3.0 that we purchased new. I have changed the oil every 3,000 miles and it has 160K on it right now. It started burning oil recently. this last oil change I tracked it as a quart every 1,000 miles. The #4 cylinder spark was also fouled, but the rest of them looked good. I did a compression check and leak down test on all the cylinders.
Compression test (dry)
1 - 210
2 - 210
3 - 210
4 - 210
5 - 200
6 - 210
Leak Down Test
1 - 7%
2 - 10%
3 - 7%
4 - 7%
5 - 10%
6 - 7%

Local machine shop said those were good numbers and that they usually did not have problems with those heads for the most part.

My question is
1. Can this be a vale seal leaking?
2. If so, can the repairs be made with out taking the head off.

Any help or links would be appreciated