Hydrogeologic Assessment
Background: Earth Forensics conducted a hydrogeologic assessment on Malibu resort tract to evaluate the cumulative impacts to groundwater from treated water dispersal at a specific parcel on Malibu Canyon Road (Project Site), pursuant to the requirements of Chapter 18.5 of the City of Malibu LCP-LIP (2002).
The Study: The objective of the assessment was to evaluate the potential effect of treated water dispersal on groundwater levels at the Project Site and adjacent properties down gradient. The work was based upon a literature review and site visit of the Project Site and surrounding properties. Geological and geotechnical data were used from various sources including regional geologic publications, previous consulting reports specific to the Rancho Malibu Resort Site, recent project-specific reports/plans for the Rancho Malibu Resort Site, and consulting reports for nearby properties.
Subsurface data from the reports were obtained from more than 120 borings drilled on and adjacent to the Project Site. The borings included those made for geotechnical analyses, groundwater monitoring, and percolation testing.
Results: The data were used to evaluate where groundwater exists beneath the Project Site as well as the geologic conditions that exist at and near the Project Site. Figures were created to illustrate the approximant location of the groundwater in cross-sectional view.
(click on the image to expand)
