Tractor and Dump Truck    CSU can provide utility trenching, excavation, and demolition, including on and off/site hauling of bulk materials. In addition, CSU provides general grading and property clean-up. CSU, Inc. PO Box 6587 Lancaster, CA 93539-6587 888-470-7703 Toll Free 661-726-0071 Local 661-948-5684 Fax