Nested Monitoring Well Construction
Summary
SCH Number
2023020622
Public Agency
Zone 7 Water Agency
Document Title
Nested Monitoring Well Construction
Document Type
NOE - Notice of Exemption
Received
Posted
2/24/2023
Document Description
The purpose of this project is to fill a data gap in the current groundwater monitoring network and act as a sentinel well for detection of potential PFAs (per- and polyfluoroalkyl substances) contamination prior to it reaching Zone 7’s Hopyard Wellfield.
This project involves drilling an exploratory boring to 800 feet below ground surface (bgs) and running a geophysical log to assess the lithology. Two 2-inch diameter PVC wells will be constructed within the exploratory boring at depths based on the lithology encountered. The work will be completed by a C-57 licensed driller using mud rotary drilling techniques. A support truck, mud shaker, and watertight roll-off bin to contain spoils will also be used during construction. The approximate amount of space needed for the job is 120 feet by 120 feet. After the wells are constructed, they will be developed to ensure communication with the aquifer. Each well in the nest will be fitted with a locking cap. The final well completion will consist of an approximately 18-inch diameter traffic rated cover that will be installed flush with the surrounding parking lot.
Zone 7 staff are coordinating with the City of Pleasanton parks department staff to minimize any inconvenience for public use of the park facilities. This includes coordination of set work areas, staging areas, and work hours. The park is adjacent to a residential neighborhood. The project will abide by the local noise ordinance and strict work start and stop times will be enforced.
The work is expected to take place around April 2023. Construction period should be about 21 days.
Contact Information
Name
Elke Rank
Agency Name
Zone 7 Water Agency
Job Title
Water Resources Planner
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Phone
Email
Location
Cities
Pleasanton
Counties
Alameda
Regions
Citywide
Cross Streets
5800 Parkside Dr
Zip
94566
Total Acres
<1
Jobs
1
State Highways
580, 680
Railways
UPRR
Airports
Livermore
Schools
Harvest park, Walnut Grove, Alisal, Fairlands
Waterways
Pleasanton Canal, Arroyo Mocho
Township
3S
Range
1E
Base
MDBM
Other Information
Parking lot at northeastern portion of the Ken Mercer Sports Park
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15303
Reasons for Exemption
Very small project in an already developed area. The project sites will look and function the same (or nearly) as it has in the past. Work will be limited to the smallest footprint practicable. There will be no or minimal native ground disturbance.
Work is within City of Pleasanton’s property and will have minimal construction-related nuisances to local residents, businesses, or recreational areas, such as disruptions to traffic and increased noise or dust, etc. Best Management Practices will be employed during construction to reduce the potential for localized erosion or impact to water quality. No impacts to sensitive habitat or wildlife are expected. City noise and traffic rules will be followed. There is not a reasonable possibility that the project could result in a significant impact.
County Clerk
Alameda
Attachments
Notice of Exemption
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