Drilling and Construction of Monitoring Well G15 – Indio Subbasin
Summary
SCH Number
2025010892
Public Agency
California Department of Water Resources
(DWR)
Document Title
Drilling and Construction of Monitoring Well G15 – Indio Subbasin
Document Type
NOE - Notice of Exemption
Received
Posted
1/28/2025
Document Description
The Department of Water Resources Technical Support Services Program proposes to drill and install one single-completion monitoring well in the Indio Subbasin in cooperation with the landowner, Coachella Valley Water District. The purpose of the well is to fill data gaps within the groundwater monitoring network and provide hydrogeologic data. Construction of the well is anticipated to last 3-4 weeks.
Drilling will consist of initially setting a 16-inch by 50-foot permanent conductor casing to advance a 10-inch-diameter boring. The monitoring well will be drilled up to 300 feet below ground surface (bgs) in the shallow aquifer zone. Geophysical surveys will be performed within the boring including: natural gamma ray; spontaneous potential; short-normal, long-normal and point electrical resistivity logs; vertical deviation; and a caliper survey. After the geophysical logs have been completed and formation samples evaluated, DWR will construct a target well screen of 100-275 feet bgs and seal for the location.
All drill cuttings will be stockpiled on-site with the potential for re-use. Fluid and drill cuttings are expected to be nonhazardous and will be sampled and analyzed for constituents for concern prior to disposal. Should soil testing within the drill cutting reveal contaminants of concern above threshold levels, cuttings are to be disposed of at a designated waste facility. All drilling fluids and borehole water will be containerized in plastic lined roll-off bins and disposed of at a designated waste facility unless otherwise specified by DWR or Coachella Valley Water District.
Contact Information
Name
Nicholas Burgos
Agency Name
California Department of Water Resources
Job Title
Environmental Scientist
Contact Types
Lead/Public Agency
Phone
Location
Coordinates
Cities
Unincorporated Community of Thermal
Counties
Riverside
Regions
Countywide, Unincorporated
Cross Streets
62nd Ave and Fillmore St
Parcel #
749-030-001
Township
7S
Range
8E
Section
2
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Information Collection, Class 6, 15306, Title 14 CCR.
Reasons for Exemption
The proposed Project is categorically exempt under Class 6, Section 15306 because it consists of basic data collection and resource evaluation activities that do not result in a significant impact to an environmental resource. A preconstruction survey was conducted which revealed no sensitive resources on the proposed Project site. Overall, no significant impacts are anticipated for biological, air quality, noise, visual, water quality, land surface, or historic and archaeological resources.
County Clerk
Riverside
Attachments
Notice of Exemption
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