The Department of Earth System Science is located in:
3200 Croul Hall (Building 417 on UC Irvine Map)

Someone is available to answer your questions from 9:00am to 5:00pm.  Feel free to call ahead to make sure someone will be here to help you. The department phone number is (949) 824-8794.  

For all academic-related questions, feel free to contact the Physical Sciences Student Affairs Office.  
134 Rowland Hall
Office hours: Monday - Friday, 9:00am - 4:00pm
(949) 824-6507
pssazot@uci.edu