Document Title Arsenic Removal Facility Is Mnd
Type Mitigated Negative Declarations
SCH# 2005102034
County Name Mono ( North CA Region )
Lead Agency Mammoth County Water District
The Mammoth Community Water District is proposing to modify the water treatment process at both of its groundwater treatment plants to include arsenic removal utilitizing the proven technology of ferric chloride treatment. This project will involve the installation of chemical feed equipment at both treatment plants to inject ferric chloride to the water treatment process. The arsenic will precipitate out of the well water, be removed on existing iron and manganese filters, and will eventually be sent to the wastewater collection system through the filter backwash process. Precipitated arsenic will eventually be disposed of at the Benton Crossing Landfill with the wastewater treatment solids, or sludge.

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