Drilling and Construction of Monitoring Well MC-5, Mission Creek Subbasin
Summary
SCH Number
2025031338
Public Agency
California Department of Water Resources
(DWR)
Document Title
Drilling and Construction of Monitoring Well MC-5, Mission Creek Subbasin
Document Type
NOE - Notice of Exemption
Received
Posted
3/28/2025
Document Description
The Department of Water Resources Technical Support Services Program proposes to drill and install one single-completion monitoring well in the Mission Creek Subbasin in cooperation with the landowner, Mission Springs 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 14-inch by 20-foot temporary conductor casing to advance a 10-inch-diameter boring. The monitoring well will be drilled up to 500 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 200-300 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 Mission Springs 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
Desert Hot Springs
Counties
Riverside
Regions
Countywide
Cross Streets
Indian Canyon Dr and Mission Lakes Blvd
Parcel #
661-030-026
Township
2S
Range
4E
Section
23
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 except for one observed burrowing owl, a candidate endangered species under the California Endangered Species Act. Appropriate avoidance measures will be implemented as outlined by the CDFW 2012 Staff Report for Burrowing Owl Mitigation, to avoid any impact on the special-status species. 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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