Reasons for Exemption
Common Sense Exemption - Where it can be seen with certainty that there is no possibility that the activity in question may have a significant effect on the environment.
The Site is recorded on DTSC’s Hazardous Waste and Substances Site List (Cortese List). The proposed project activities will install a limited number of new wells and limited trenching at the Site property, which already has more than 20 borings or wells installed for previous site investigation and soil vapor remediation. Based on the substantially smaller extent and scope of work compared to previous activities related to remediation of onsite contaminants, the additional remediation activities are considered to result in no or minimal impacts on the environment.
Therefore, DTSC has determined with certainty that there is no possibility that the activities in question may have a significant effect on the environment because the project would not result in "a substantial, or potentially substantial, adverse change in any of the physical conditions within the area affected by the project, including land, air, water, minerals, flora, fauna, ambient noise, and objects of historic or aesthetic significance.”
The project is consistent with applicable state and local environmental permitting requirements including, but not limited to, off-site disposal, air quality rules such as those governing volatile organic compounds and water quality standards, and
approved by the regulatory body with jurisdiction over the Site. Prior to implementing field activities, all necessary permits will be obtained from the city of Costa Mesa, County of Orange, and South Coast Air Quality Management District.