Thomas G. Olsen Associates No description specified. 1-2 (2 Records) Documents Archaeological Assessment For Grading Permit: Environmental Assessment 35811 (1991) The Santa Ana Regional Interceptor Project Sawpa-Sari Reaches IV D & E: a Cultural Resource Survey of a 18 Mile Right-of-Way from Mira Loma to Colton, Riverside and San Bernardino Counties, CA (1992)