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AWS D1.1 isn't going to address your situation where you have a hole drilled through a groove weld. Ideally, you would have someone UT the joint before the hole was drilled. I'm not sure what your relationship is with this weld is....(ie inspector, welder who made the weld, etc...), but the Engineer-Of-Record should sign off on the location for that hole. If the EOR doesn't have any problem with it's location, it should be fine.
Raising the question to the EOR is how I would handle it. Also, you might want to grind the faying surfaces flush on the side where something may bolt up.