Specifications include, but are not limited to: A. This is a single-provider on-call as needed service Agreement for the Positive Location of Underground Utility Facilities (potholing). B. As used in this Agreement, reference to the Department of Transportation (Caltrans) Caltrans Contract Manager includes its designee or successor (Caltrans Contract Manager). C. This single-provider Agreement shall provide services on an on-call and as-needed basis as requested by Caltrans Contract Manager through the issuance of Service Requests within the designated service areas set forth in Section 2, below. D. Contractor shall furnish all labor, materials, parts, and equipment necessary to provide positive location services using vacuum excavation, hand excavation, or comparable methods acceptable to Caltrans Contract Manager and the utility facility owner, to locate underground utilities, including, but not limited to; petroleum, data transmission, telephone, gas, electric, water and sewer pipelines, and perform services as specified in this Agreement. In special circumstances, and only when authorized by Caltrans Contract Manager, the use of a backhoe or other approved methods may be used for positive location.