The Contractor will provide the Department of Water Resources (DWR), Division of Engineering (DOE), Geotechnical Services Branch, Project Geology Section on an asneeded and as-directed basis, hydrogeology, environmental geology, and hydrology services. Contractor will provide such services and necessary ancillary support services as follows: A. Hydrogeology and Environmental Geology services and associated engineering services: 1. Prepare hydrogeologic, hydrologic, and environmental geologic reports and drawings summarizing the results of work requested in Task Orders. 2. Review hydrogeologic, hydrologic, and environmental geologic reports and drawings prepared by DWR or others. 3. Prepare hydrogeologic, hydrologic, and environmental geologic maps and cross sections for use by engineers, engineering geologists, geologists, hydrogeologists, and regulators. 4. Oversee geologic drillholes. The resulting logs will be suitable for engineers and geologists to perform critical analysis of the materials and sites being investigated.