1. 1 US EPA RadNet Program California Air Resources Board Monitoring & Laboratory Division Special Purpose Monitoring

2. 2 Program History 1950’s: Federal government begins monitoring radioactive materials due to nuclear weapons testing 1970: Monitoring for rads is consolidated under the US EPA 1973: US EPA creates a continuous monitoring system called “Environmental Radiation Air Monitoring System” (ERAMS) 2005: ERAMS is renamed “RadNet”

3. 3 What Is RadNet? US EPA’s environmental radiation monitoring program Categories monitored: –Drinking water –Precipitation –Pasteurized milk –Air

4. 4 Air Monitoring Sept. 11 th brought renewed emphasis to monitoring airborne rads. US EPA installed a nationwide network of 124 “near real- time monitors”

5. 5 California RadNet Air Monitoring California’s RadNet sites: –Anaheim –Bakersfield –Eureka –Fresno –Los Angeles –Riverside –Sacramento (Began late 2008) –San Diego –San Francisco –San Jose –San Bernardino (11th site as of early 2011)

6. 6 The RadNet Monitor Stand alone monitoring system developed by General Atomics Acquires, stores and electronically transmits data to the National Air Radiation & Environmental Lab (NAREL)

7. 7 RadNet Components (Met. & Comm.) Satellite antenna Temp. sensor Cellular antenna

8. 8 RadNet Components (Sampling) Beta & gamma detectors Filter

9. 9 RadNet Components (Data Mgmt.) Local Processing Unit (i.e. CPU)

10. 10 Operator’s Role Change and field test filters 2x / Week Complete and submit “Air Particulate Sample Report” to NAREL Occasionally assist US EPA with trouble shooting Annually calibrate the RadNet w/ US EPA’s assistance

11. 11 Filter Change & Field Test Perform background count w/ the geiger counter Remove and replace the exposed filter Perform count on exposed filter w/ the geiger counter

12. 12 Sample Report Completion After completion, mail form & filter to NAREL

13. 13 Interesting Links Japanese Nuclear Emergency Webpage http://www.epa.gov/japan2011/index.html USEPA Envirofacts – RadNet Data http://iaspub.epa.gov/enviro/erams_query_v 2.simple_query RadNet Operator Webpage http://www.epa.gov/narel/radnet/operators/

14. 14 Thanks for watching. Contact: Whitney Okabayashi (916) 324-3997