The proposed action today is authorization to prepare a final design for this project. The whole of the action also includes construction and operation of the project. The term "Project" in CEQA refers to the whole of the action and to the underlying activity being approved, not to each governmental approval. (CEQA Guideline §15378(a}, (c)-(d)). This definition ensures that the action reviewed under CEQA is not the approval itself but the development or other activities that will result from the approval. Therefore, the Project is subject to CEQA.
The Project will consist of installing 4 tanks (approx. 12' diameter, 17' height}, associated cartridge filters, piping, a chloramination disinfection facility housed within a structure, along with associated electrical, SCADA, water quality measuring equipment, pump upgrades and approximately 1, 100 feet of 10"-18" water main pipe located in the City of Santa Clarita's Right-of-Way between the Hanby Well and the Sand Canyon Pump Station site. The vessels will be loaded with ion exchange resin which will trap the contaminants via adsorption. The treatment system will treat up to 1 ,500 gpm for the Santa Clara Well and 950 gpm for the Hon by Well. The treatment is needed since the chemical group PFAS has begun to be regulated and tests of these wells have detected these chemicals, which has led to our inability to use said wells without treatment.
During normal operations, the primary discharge at the site will occur when the wells are started up and the well water is discharged to waste prior to sending water through the treatment and distribution system. For well start-up the pump to waste duration is approximately 2-3 minutes at a rate of 1,500 gpm for the Santa Clara Well and 950 gpm for the Honby Well.