Construction of Foothill Water Treatment Plant's Pre-treatment System
Summary
SCH Number
2022040112
Public Agency
State Water Resources Control Board
Document Title
Construction of Foothill Water Treatment Plant's Pre-treatment System
Document Type
NOE - Notice of Exemption
Received
Posted
4/6/2022
Document Description
The project involved the construction and installation of two sand separators, two oxidation media filters (OMF) and other associated chemical injection systems (sodium hypochlorite, sulfuric acid, sodium hydroxide, ferric sulfate, sodium bisulfate, liquid ammonium sulfate injection systems). Additional cartridge filter was also installed for the bypass water. The pre-treatment systems are constructed within the Foothill Water Treatment Plant. The sand separators will capture the particle such as iron sulfide and sand. The OMF will remove iron, manganese, hydrogen sulfide, iron sulfide, and arsenic. The OMF system will remove these foulants upstream of the Reverse Osmosis (RO) system and significantly reduce the fouling potential for the RO membranes.
Contact Information
Name
Naira Ghukasyan
Agency Name
State Water Board
Job Title
Environmental Scientist
Contact Types
Lead/Public Agency
Phone
Location
Cities
Beverly Hills
Counties
Los Angeles
Regions
Southern California
Other Location Info
345 Foothill Road, Beverly Hills, CA 91210
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Article 19, Section 15301: Class 1 Existing Facilities
Reasons for Exemption
The Foothill Water Treatment Plant is an existing structure. The pre-treatment systems composed of sand separator, OMF system and associated chemicial injection systems, cartridge filter, among others, are additional treatment processes to address the issue of membrane fouling and reduce/remove the concentrations of arsenic, manganese, total dissolved solids, specific conductance, turbidity, color and odor in the groundwater wells prior to distribution. The pre-treatment systems are constructed within the Foothill Water Treatment Plant.