Seismic Monitoring Station

Summary

SCH Number
2018018330
Lead Agency
Emergency Services, Office of (Office of Emergency Services, California)
Document Title
Seismic Monitoring Station
Document Type
NOE - Notice of Exemption
Received

Document Description
This new station will contribute to the CA Earthquake Early Warning System (CEEWS) designed to potentially save thousands of lives during a large earthquake, prevent critical infrastructure damage and expedite recovery following a large earthquake. The network to which this sensor is connected will contribute real-time data to accurately record and warn people of strong shaking due to earthquakes in the region, and help provide records of ground motion that would be of immense scientific, engineering and public safety value. Caltech/USGS plan to install and operate an outdoor seismic monitoring station at the Lat/Long location noted above. One-day installation will take place in a 32-sq. ft. area, to install three small structures and a fence: 1. 3'x3'x10" sensor vault set on a 6" concrete base, with an attached PVC-pipe posthole (10" diameter)running from center of vault, to a maximum of 6' into the ground, leading to a seismometer; 2. 4'x4'x6" concrete base on which a battery box, solar panel equipment, and communications equipment are housed; 3. Antenna mounted on a 2'-diameter pole supported by a 4'-deep concrete base; and 4. 10'x15'x5' fence around site, with fence posts placed 1' deep in 4" diameter holes. A flexible conduit 1' deep and 5" wide will connect the three structures. Grounding rods will be inset next to the equipment to protect site from lightning strikes. Holes for the vault, solar panel mount, and antenna and fence poles will be dug by a small backhoe or hand-operated auger. Access to site is entirely by existing roads and trails. There are no hazardous substances involved. If needed, a small generator (~8 KW) will be used to power a hand-loaded concrete mixer and any other tools needed for the work.

Contact Information
Ryan Arba
Office of Emergency Services, California
3650 Schriever Avenue P.O. Box 419023
Mather, CA 95655-4203

916-45-8132
ryan.arba@caloes.ca.gov

Location

Cities
San Diego
Counties
San Diego
Cross Streets
Rio Vista Rd.

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
S:15303,15304,15306, Class 3,4,6
Reasons for Exemption
New Construction. Minor Alterations to Land. Information Collection.
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