Arlington/48th Street Groundwater Treatment Plant

Project Owner

California American Water


Los Angeles, CA

Project Overview

Valentine provided design of a GAC treatment system (four 12-foot diameter vessels) with a capacity of 2,000 gpm at the location of the existing Arlington Well to provide TCE treatment to Arlington Well & the 48th Street Well, located down the street from treatment system. The project also included the process/mechanical design of the interconnecting piping, backwash supply and waste piping, replacement of existing concrete well-to-waste sump, replacement of chlorine injection and sampling line, addition of a sodium hypochlorite storage tank and chemical feed pumps, well pump sound enclosure, and upgrade of Arlington well pump motor to 200 hp, column pipe, bearings, headshaft and bowl assembly.  Valentine led the CEQA/CU permitting efforts with City of Los Angeles, successfully approving project through Public Hearing. Valentine also assisted in amending NPDES permit for well-to-waste disposal and receiving encroachment clearance through LADWP for construction nearby City powerlines overhead of treatment system.

Unique Project Features

Sensitive Neighborhood

Contaminant Treatment

Multiple Agency Coordination

Pump-Treat-To System Configuration