City of Monterey Park Delta Treatment Plant

2 Documents in Project


SCH Number
Lead Agency
San Gabriel Basin Water Quality Authority
Document Title
City of Monterey Park Delta Treatment Plant
Document Type
NEG - Negative Declaration
Present Land Use

Document Description
The proposed project consists of construction facilities for the extraction and treatment of perchlorate from the City of Monterey Park's (City's) Well 12 and proposed Well 15, and for the extraction and treatment of volatile organic compounds (VOC's) for the City's Wells 1, 3 and 10, to be located at the City's existing Delta Pumping Plant located at 3657 N. Delta Avenue, in the City of Rosemead, as shown in Figure 1. The proposed project is sometimes referred to herein as the Delta Treatment Plant. It is located in the western portion of the South El Monte Operable Unit (SEMOU), which is a subunit of the San Gabriel Superfund Site established by the United States Environmental Protection Agency (EPA). Multiple areas of the San Gabriel Basin aquifer are contaminated with VOCs, as well as other chemicals including Nitrate, Perchlorate, N-Nitrosodimethylamine (NDMA), and 1,4-Dioxane. These chemicals of concern continue to migrate in a westerly direction within the deeper aquifer of the SEMOU and have affected numerous water purveyors in the SEMOU. The proposed project meets EPA's objectives of containment, capture and removal of contaminants for the SEMOU and provides a potable water supply for the City whose water supply wells have been impacted by contamination.

Contact Information
Randy Schoellerman
San Gabriel Basin Water Quality Authority
858 Oak Park Road
Covina, CA 91724

Phone : (626) 859-7777


Los Angeles
Cross Streets
Delta Ave, Fern Ave.
State Highways

Notice of Completion

Review Period Start
Review Period End
Development Type
Water Facilities (treatment plan)
Local Action
Other Action Other Action: water treatment facility
Project Issues
Water Quality Water Supply
Reviewing Agencies
California Department of Parks and Recreation Department of Fish and Wildlife, Region 5 Department of Water Resources Native American Heritage Commission Regional Water Quality Control Board, Region 4 Resources Agency State Lands Commission State Water Resources Control Board, Divison of Financial Assistance Caltrans, District 7 Department of Health Services

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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