Hey guys I recently read an article stating studies on common soft drinks that stated drinks like sprite can have an ethanol content of .0648 if I drink a bottle of sprite the night before a EtG drug test in the morning is there a possibility I can fail with a 500ng cut off

Quite low. I wouldn't be too concerned about it. Even if the cutoff was 100 micrograms I wouldn't be worried about it. There is small volumes of alcohol in a lot of what you eat so this won't show up more then an apple.