Radiation Found In San Francisco, CA Tap Water — Rainwater Radiation 18,100% Above Drinking Water Limit
April 1, 2011 at 1:43 am - Permalink - Source via Alexander Higgins Blog
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Title: Radiation Found In San Francisco, CA Tap Water — Rainwater Radiation 18,100% Above Drinking Water Limit
Source:
Alexander Higgins Blog
URL Source: http://blog.alexanderhiggins.com/20 ... 0-drinking-water-limits-13014/
Published: Apr 1, 2011
Author: Alexander Higgins/Various
Post Date: 2011-04-01 15:27:02 by Original_Intent
Keywords: Fukushima, radiation, reaches, US
Views: 488
Comments: 30
Despite countless reassurances that no harmful levels of radiation from the Japan nuclear fallout would hit the US from the EPA, the University of Berkley in California is now reporting that rainwater in San Francisco water has now been detected at levels 18,100% above federal drinking water standards. Again, with just about all other news of the radiation hitting the US, the news is once again reported to the public over a week after it was first detected. For background information see: Breaking News From Energy News: UCB Rain Water Sampling Results, University of California, Berkeley, Department of Nuclear Engineering: Iodine-131 level in rainwater sample taken on the roof of Etcheverry Hall on UC Berkeley campus, March 23, 2011 from 9:06-18:00 PDT 20.1 Becquerel per liter (Bq/L) = 543 Picocuries per liter (pCi/L) Conversion calculator here. The federal drinking water standard for Iodine-131 is 3 pCi/L. (Source) UCB Rain Water Sampling Results here. Radiation in San Francisco 18,100 Times Above Drinking Water Limits 3/31 (8:00pm): Our first preliminary tap water samples have been analyzed. The only isotope we have detected besides background is I-131, at low significance: 0.024 ± 0.014 Becquerels per liter. This level is much lower than our rain water measurements by a factor of approximately 300, and lower than our milk measurement by a factor of 30. We will be continuing measurements of tap water to confirm this result; the level is so low it is approaching the threshold of detection. Quick updates on our other samples: Rainwater results have been updated to be current as of the last rainfall on Saturday 3/26. Air filtration will be posted this evening to be current to 3/30. A sample of milk from before Fukushima has been added to the milk sampling results. One additional note: There was some confusion about the dating of the milk data. Yesterday we listed the date incorrectly as “Purchased on” but the date was in fact the “Best By” date. The date itself was wrong — the sample listed yesterday as 3/25 was actually 4/4. The background sample posted today was 3/25. Apologies for any confusion. 3/30 (5:30pm): Our milk sampling results are now posted. The only isotope we have detected besides background is I-131, at 0.70 Becquerels per liter. This level is lower than our rain water measurements by a factor of approximately 10, while higher than our creek water measurements by a factor of 10. One would have to drink roughly 3,800 liters of milk to receive a radiation dose equivalent to a round-trip cross-country flight. 3/29 (11:35am): Our air results and rain water results have both been updated. The isotope amounts in both have leveled out, which means that we might not be observing a downward trend at this point. We are continuing these tests so that we can observe the eventual expected decline in activities. … 3/27 (2:00pm): Strawberry Creek run off results posted. We do observe all signatures in the run off creek water, but the dilution is from ~2% for I-131 to 15% for Cs137. However, Cs137 and Te132 are just below minimum detectability for our system and the real dilution is most likely closer to 2-5%. Reservoir and tap water sampling begins next week. These activities are factors of 10 to 50 below rain water results. 3/26 (6:20pm): Rain water sample results posted for 3/24 – 3/25. I-131 and Te-132 activities are lower than previously observed (3.12 and 0.27 Bq/L resp.) while Cs137 remains near the high point at ~0.5 Bq/L. 3/26 (10:45am): Air sampling results posted for 3/22 – 3/24. We have observed correlated increasing trends in Cs-137 and I-131 with the water sampling results. Te-132 seems to have increased more in air than in the rain water. Full understanding of the these trends may not be understood for some time until we start to combine this data with other information. Levels remain extremely low, but we are maintaining a close watch on these trends. 3/26 (9:45am): Rain water results posted for the past few days. Delay was due to testing of new data analysis chain script that will make posting results more efficient. We have observed a sharp up-tick in Cs-137 levels from around 0.2 Bg/L to 0.55 Bq/L. I-131 had a sharp rise on 3/23 of I-131 concentration from 6 Bq/L to 20 Bq/L. I-131 levels returned to 6 Bq/L on 3/24. Reasons for the I-131 spike is still unknown. Te-132 and I-132 levels remain relatively constant. 3/24 (2:40pm): Our new air sampling results are now posted. These results should be considered preliminary because we are trying to learn more about the efficiency of our 0.3 micron HEPA filters for capturing the particles of interest (we have assumed 100% efficiency for our current calculations). We thank everyone for their patience as we worked to ensure we had the correct calibration for these measurements. According to our measurements, the exposure to the public is very low — at the highest levels we measured, breathing the air for 2,000 years would increase one’s radiation dose by the same amount received by taking a cross-country airplane flight. 3/22 (3:05pm): Rain water sampling results from the evening of 3/19-3/20 are now posted. We continue to observe elevated levels of radioisotopes originating from the Japanese reactors. Some trends in activity are starting to emerge, such as a slow increase in the activity of I131, and a decrease and then increase in the activity of Te132. Cs137 activity may be constant. We will continue to monitor these trends. Our measured activity levels remain extremely low and exposure to the public is insignificant. … 3/20 (4:15pm): Rain water results show trace levels of radioactive iodine (I131,I132), cesium (Cs134, Cs137), and tellurium (Te132). The amounts show that the activity we are observing originated from any of the three operating reactors that was shut down since I-131 and Te132 half-lives are less than 10 days and the spent fuel from unit 4 had not operated for > 130 days. The calculated exposure to the public is so low that the consuming of ~500 liters of this water would only increase dose by the same amount received by taking a cross-country airplane flight. … 3/19 (10:34am): Rain fall from 3/17-2pm to 3/18-12:15pm. Preliminary results show trace amounts of radioactive iodine (I131, I132), cesium (Cs137, Cs134), and tellurium (Te132) which are not naturally occurring elements and are assumed to originate from the Fukushima nuclear site. In context, we also see Be-7 (cosmogenically produced) and Pb-212 (radon daughter) which are naturally occurring isotopes that also show up normally in rain water. Preliminary analysis show levels remain well below that which would cause health effects. We are currently awaiting better calibration of our detector system to publish amounts. The tap water measurements are done with the same setup as the Rainwater Collection Experiment. FORECAST: RADIOACTIVE PARTICLES CONCENTRATED OVER MIDWEST ON APRIL 1, 2:
Radioactive Iodine-131 in rainwater sample near San Francisco was 18,100% above federal drinking water standard
March 31st, 2011 at 06:33 PM 
Nuclear Radiation Found In Drinking Water and Milk
Results Of The First California Drinking Water Sample Tests Positive For Japan Nuclear Radiation
I131
(Radioactive Iodine 131)I132 Cs134 Cs137 Te132 Data Sample Date Bq/L (liters**) Bq/L (liters**) Bq/L (liters**) Bq/L (liters**) Bq/L (liters**) Estimated Minimum Detectable Activity (MDA) 0.012 0.022 0.018 0.022 0.012 3/29/2011 7:54 0.024 ± 0.014 (110,000) less than MDA less than MDA less than MDA less than MDA data Nuclear Fission Products Caesium and TE-132 Also Detected In Addition to Iodine
What the Corporate Media Refuses To Tell The Public
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