In some other contexts, people have posted that 1 college semester commonly approximates 1 high school year in beginner / intermediate foreign language. The difference may be due to beginner / intermediate college foreign language in California public colleges and universities is usually in 5 credit courses instead of 4 or 3 credit courses in many other colleges and universities.
However, for college admission, it is likely to be very dependent on the specific college. For actual placement in more advanced foreign language courses in college, many colleges do have placement procedures or testing, because prior high school and college courses can vary in content taught.