Radiological Environmental Protection for LCLS-II High Power Operation James Liu, Jan Blaha, Maranda Cimeno, Stan Mao, Ludovic Nicolas, Sayed Rokni, Mario Santana and Henry Tran EPJ Web Conf., 153 (2017) 03014 Published online: 25 September 2017 DOI: 10.1051/epjconf/201715303014