New Seismic Monitoring Station Installation

Summary

SCH Number
2018098101
Lead Agency
Emergency Services, Office of (California Governor's Office of Emergency Services)
Document Title
New Seismic Monitoring Station Installation
Document Type
NOE - Notice of Exemption
Received
Posted
9/6/2018

Document Description
The state-of-the-art earthquake recording and telemetry equipment proposed to be installed at this station will contribute continuous seismic data to the CA Earthquake Early Warning System (CEEWS) and Shake Alert, designed to potentially save thousands of lives during a large earthquake, prevent critical infrastructure damage, and expedite recovery following a large earthquake. The state-of-the-art earthquake recording and telemetry equipment proposed to be installed at this station will contribute continuous seismic data to the CA Earthquake Early Warning System (CEEWS) and Shake Alert, designed to potentially save thousands of lives during a large earthquake, prevent critical infrastructure damage, and expedite recovery following a large earthquake. With permission from the property owner secured, USGS plans to upgrade and operate the seismic monitoring station at the Lat/lon location noted above. The existing equipment enclosures will be removed and replaced with two new aluminum enclosures (2' x 3' x 21"H) mounted to 6" thick concrete pads: one concrete pad at grade and the second concrete pad at a depth of typically 16" below grade. The existing antenna and PV mast at the site will be replaced with an 8' tall steel pipe which will be mounted to one enclosure and concrete pad and hold the 2'x4' solar array and telemetry antenna. The two enclosures will be connected by flexible conduit in a shallow trench; this trench will be filled to grade after installation. A ground rod will be driven to a depth of 8' proximate to the battery/radio enclosure; additionally, a 2-gauge wire will be buried in a 12" deep, 6" wide trench around the exterior of the enclosure. All excavation will be dug by hand or mini-excavator, depending on site accessibility. There are no hazardous substances involved during construction nor as components of the site. If necessary, a small generator will be used to power a hand-loaded concrete mixer and any other tools needed for the construction. Construction/installation takes 3 days and covers a total of 175 sq ft. (5' x 35').

Contact Information
Ryan Arba
Office of Emergency Services, California
3650 Schriever Avenue
Mather, CA 95655-4203

Phone : (916) 845-8132
ryan.arba@caloes.ca.gov

Location

Coordinates
36.81679°'"N 121.49802°'"W
Cities
San Juan Bautista
Counties
San Benito
Cross Streets
549 Mission Vineyard Rd
Other Information
Dot Map ID: UG1018; Station Name/Site Code: St. Francis Retreat/ NC.HSFB

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
15303, 15304, 15306
Reasons for Exemption
This project is exempt in accordance with Class 3 as described above; construction of new small weatherproof enclosures to operate seismic sensor equipment for the purpose of data collection (Class 6). In accordance with Class 4, the project described above consists of minor public or private alterations in the condition of land and/or vegetation which do not involve removal of healthy, mature, scenic trees.

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 state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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