ERHS Staff Access Voice Mail by first dialing the school's main number: (562) 801-7500 Arrange by department... Administration Classified Counselor English History and Social Studies Math Physical Education Resource ROP Science Special Education World Languages Visual and Performing Arts All Departments 0 items found. Juan Perezchica Department: Science Email: jpperezchica@erusd.org 0 Phone Ext: 57131 Location: M-1 Link: Twitter: Edmodo: More... Classes:• Chemistry in the Earth System • Forensics