INVOICE Company Name (Vendor):   Dr. Victor Ponce Mailing address:  13386 Samantha Ave, San Diego CA 92129-2151 Vendor ID number:  1714693 Invoice date and number:  November 12, 2010, Invoice No. 01 URS Work Order number:  240746 URS Job Number and Cost Code:  27679038 Cost Code 04000 DETAIL OF TIME AND EFFORT Initial meeting at URS offices, June 25, 2010:   2 hours. Field visit to Cañon Los Laureles, Tijuana, with Luis Parra and Alberto Castro, July 3, 2010:   8 hours Field visit to Cañon El Matadero, Tijuana, with Luis Parra and Alberto Castro, July 10, 2010:   8 hours Meeting with Project Team in the field, July 23, 2010:  5 hours. Work session with Luis Parra, November 5, 2010:  2 hours. Total: 25 hours Hourly rate: $175/hour Total amount for this invoice: Four-thousand three hundred and seventy-five dollars $4375.00 ____________________________ Victor Ponce, Consultant ____________________________ Date