Holdrege & Kull prepared a conceptual site model (CSM) to assess the sources and extent of a contaminant plume emanating from the landfill property. Using the results of the CMS, H&K designed a perimeter cutoff trench dewatering system to prevent contamination of groundwater at the site. The cutoff trench will lower the groundwater level to below the bottom of the waste and extract the existing plume to meet the requirements of the California Water Quality Control Board. H&K provided construction quality assurance (CQA) observation and materials testing services during construction and operation and maintenance (O&M) activities, including system startup monitoring and reporting. H&K is currently providing ongoing monthly O&M, telemetry monitoring, sampling and analysis, and reporting.
H&K’s innovative design for this project saved the City of Lincoln approximately $12 million. In 2016, the project earned the Project of the Year Award for Environmental Engineering Services from the Sacramento Chapter of the American Public Works Association (APWA). Total Running Time = 8′ – 5″