Apple will push its Los Angeles region retail presence further north later this year, into the Santa Clarita valley’s Valencia Town Center shopping mall. The mall is along Interstate 5 about 35 miles north of LA, and about 20 miles from the nearest existing store in Northridge. As part of the Westfield group of malls, it underwent a $140 million renovation last year, resulting in 40 new open-air spaces. The exact location of the store within the mall isn’t known. Based on construction and hiring schedules, the store could open by mid-September.