Wellhead Treatment Project

3 Documents in Project


SCH Number
Lead Agency
Ontario, City of (City of Ontario)
Document Title
Wellhead Treatment Project
Document Type
MND - Mitigated Negative Declaration

Document Description
City of Ontario Wellhead Treatment Project which proposes to install infrastructure to treat groundwater that has been impacted by perchlorate and deliver the treated water to the City of Ontario's municipal water supply. The project will be funded by State Proposition 50. Specifically, the project proposes to pump water from existing City Well No. 41, convey the water through a new pipeline, where it will be treated in a new treatment plant, and discharge the treated water into the City's existing water distribution system. Well No. 41 is located on Hellman Avenue, approximately 300 feet south of the intersection of 5th Street, in the northeastern portion of the City. Water extracted from Well No. 41 will travel approximately 1,300 feet in new conveyance pipeline, to be constructed within North Hellman Avenue, to the new treatment plant, which will be constructed on East 4th Street near the intersection of 4th Street and Hellman Avenue. The new pipeline will be constructed of 16-inch cement-mortar lined and coated steel. The new treatment plant will be constructed within a City-owned vacant parcel that is approximately 50 feet wide and 100 feet deep. Once treated, the water will be pumped into approximately 200 feet of new conveyance pipeline to be constructed in 4th Street, between the treatment plant and the City's existing 36-inch water distribution pipeline.

Contact Information
Richad Ayala
City of Ontario
303 East B Street
Ontario, CA 91764

909 395 2421


34°4'18"N 117°35'39"W
San Bernardino
Cross Streets
4th Street and Hellman Avenue
State Highways
Ontario Int'l

Notice of Completion

Review Period Start
Review Period End
Development Type
Water Facilities (Wellhead Type)
Local Action
Other Action Other Action: Wellhead Treatment Project
Project Issues
Landuse Wildlife Wetland/Riparian Water Supply Vegetation Traffic/Circulation Toxic/Hazardous Soil Erosion/Compaction/Grading Recreation/Parks Public Services Noise Geologic/Seismic Forest Land/Fire Hazard Flood Plain/Flooding Coastal Zone Biological Resources Archaeologic-Historic Air Quality Agricultural Land Aesthetic/Visual
Reviewing Agencies
California Department of Public Health California Department of Parks and Recreation California Highway Patrol Caltrans, District 8 Department of Conservation Department of Fish and Wildlife, Region 6 Department of Toxic Substances Control Department of Water Resources Native American Heritage Commission Office of Historic Preservation Regional Water Quality Control Board, Region 8 Resources Agency State Lands Commission State Water Resources Control Board, Division of Water Rights State Water Resources Control Board, Divison of Financial Assistance
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