Title: UCB Milk Sampling Results
Source: University of California Berkeley Department of Nuclear Engineering
Date: 1/14/2012 (9:40am)
By integrating all of the milk data we have collected since March 11, we can estimate the total effective dose equivalent (TEDE) one could have received from exposure to fission product isotopes in milk to date. For someone drinking milk at the relatively high rate of one gallon per week, the TEDE could be nearly 1 microsievert, or the total effective dose equivalent for only 12 minutes on an airplane flight or 3.7 hours of the average person’s background exposure from natural sources of radiation.
Pasteurized, Homogenized Milk from the San Francisco Bay Area with Best By Date of 12/29/2011
- Cs-134: 0.068 Becquerels/liter (Bq/l) ±0.011 [MDA=0.044]
- Cs-137: 0.075 Bq/l ±0.015 [MDA=0.052]
Total cesium is .143 Bq/l, or 3.87 picocuries/l (pCi/l) (1 Bq = 27.1 pCi).
The EPA Maximum Contaminant Level for radioactive cesium in milk is 3 pCi/l:
“EPA lumps these gamma and beta emitters together under one collective MCL [Maximum Contaminant Level], so if you’re seeing cesium-137 in your milk or water, the MCL is 3.0 picocuries per liter; if you’re seeing iodine-131, the MCL is 3.0; if you’re seeing cesium-137 and iodine-131, the MCL is still 3.0.” -Forbes.com
Current levels are about 40% higher than what was detected 6 months ago:
Pasteurized, Homogenized Milk from the San Francisco Bay Area with Best By Date of 8/22/2011
- Cs-134: 0.047 Bq/l ±0.010 [MDA=0.041]
- Cs-137: 0.052 Bq/l ±0.013 [MDA=0.044]
See the data here
Published: January 16th, 2012 at 12:09 pm ET