The contract is for on-call water quality and hydrologic monitoring and assessment services, including maintenance of the County's rainfall and hydrological monitoring network, assessment and QA/QC of rainfall and hydrological data, and development of data analysis tools and visualization products. The contract has a firm-fixed fee/usage structure, with a total contract amount not to exceed $6,000,000 over three years. The vendor (CWE) will provide personnel with various expertise, including project management, engineering, and environmental science.