Monica Baykeeper’s (“Plaintiff”) claim that the City of Malibu (“City”) abused its discretion in certifying the environmental impact report (“EIR”) for the City’s Legacy Park project (“Project”) because it failed to adequately analyze (1) construction-related water quality impacts; (2) the impact of using treated effluent from the adjoining Malibu Lumber Yard; and (3) cumulative groundwater impacts of the project. The appellate court concluded that the construction-related water quality impacts were moot since the Project had already been constructed during the pendency of the appeal and that there was substantial evidence to support the City’s findings that the Project’s use of Lumber Yard wastewater effluent and stormwater did not create a cumulative groundwater impact within an area of the City known for significant groundwater problems.