Rain Water & Rain Swab Testing Reports for 2016


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Station location http://sccc.org.au/monitoring/Australian-Map.jpg


This short animation of Northern, and Southern Hemisphere air circulation, shows why we can get detections so far south.

http://www.youtube.com/watch?v=qh011eAYjAA



Roof down pipe filter design for rainwater testing, http://sccc.org.au/down-pipe-filter-design



June 2016 Roof Sludge Sample Test

Here is a test of 214 grams of roof sludge collected from a stainless steel mesh rainwater tank inflow filter. It was collected after a rain event passed over the area on the 20th June 2016. The amount of rainfall for the day was 74.5 mm.

There are significant detections of Be-7 and Pb-210 in this sample. The Beryllium-7 was most likely created by spallation in the upper atmosphere, by cosmic rays and solar activity. As there was a 21 day delay between collection, drying, and testing, some of the Be-7 would have decayed.

The source of the PB-210 detection is possibly from a combination of Radon-222 decay daughter washout, and Radium-224 decay. The Pb-212 detection indicates the possible presence of volcanic ash. The Radium-224 is a decay daughter of Thorium-232. Thorium-232 can be released during volcanic activity in volcanic ash, see Th-232 decay chart below.

http://periodictable.com/Isotopes/090.232/index.full.html

This is a significant detection of Pb-210. I don't have a check source for this region of energy. A very rough estimate is that the Pb-210 activity is ~ 28 Bq/Kg or greater, assuming this type of scintillator has approximately 50% efficiency around this keV region.

Test chart of roof sludge:



There was a small spike in local background levels a day before this rain event occurred.





May 2016 down pipe rain water filter test

There was 123 mm of rainfall in May.

Small amounts of Pb-210 and Be-7 where detected, plus a very small detection of a possible 77 X-ray from Lead Pb-212, which is the decay daughter of Radon-220. Beryllium Be-7 can be created naturally in trace amounts by spallation in the upper atmosphere by cosmic rays. Lead Pb-210 is the decay daughter of naturally occurring Radon-222 decay. Both Be-7 and Pb-210 can also be released from nuclear power plants, and nuclear accidents. The detection of the Pb-212 77 keV X-ray probably indicates the presents of a small trace of volcanic ash in the air.

May 2016 rain water filter test chart





April 2016 down pipe rain water filter test

There was 123 mm of rainfall in May.

April 2016 received 68.5 mm of rainfall. The rain water testing has been consistent for months now, with the usual Pb-210 and Be-7 being detected. Beryllium Be-7 can be created naturally in trace amounts by spallation in the upper atmosphere by cosmic rays. Lead Pb-210 is the decay daughter of naturally occurring Radon-222 decay. Both Be-7 and Pb-210 can also be released from nuclear power plants, and nuclear accidents. There has also been a detection of the 77 X-ray from Lead Pb-212, which is the decay daughter of Radon-220. The detection of the Pb-212 77 keV X-ray, probably indicates the presence of a small trace of volcanic ash in the air.

April 2016 rain water filter test chart





March 2016 down pipe rain water filter test

There was a low 96 mm of rainfall in March.

The rain water testing has been consistent for months now, with the usual Pb-210 and Be-7 being detected, plus the detection of a possible 77 X-ray from Lead Pb-212, which is the decay daughter of Radon-220. Beryllium Be-7 can be created naturally in trace amounts by spallation in the upper atmosphere by cosmic rays. Lead Pb-210 is the decay daughter of naturally occurring Radon-222 decay. Both Be-7 and Pb-210 can also be released from nuclear power plants, and nuclear accidents. The detection of the Pb-212 77 keV X-ray probably indicates the presents of a small trace of volcanic ash in the air. (See February 2016 rain water filter report)

March 2016 rain water filter test chart





February 2016 down pipe rain water filter test


There was 80.5 mm of rainfall in February, which it not that much for this time of the year here. This test was delayed because a small trace of another isotope was detected in the February rain water filter test.


I tested this filter three times over the month, to see if this isotope peak was decaying. So did it? Yes it did. The best fit seems to be that it is the signature 77 Kev X-ray peak for Pb-212. Pb-212 is the decay daughter of Radon-220 which is the decay daughter of Ra-224. See Th-232 decay chart below.

http://periodictable.com/Isotopes/090.232/index.full.html


The reason I came to this conclusion, was the last test showed this 77Kev peak had decayed, and more Pb-210 was detected than the first test that was conducted at the beginning of February. The air flow during this period had been from a region of the Eastern Pacific Ocean, where volcanoes had been active recently. Thorium-232 and its decay daughters are released during volcanic activity. The usual Pb-210 and Be-7 were also present.


February 2016 rain water test chart




Southern Hemisphere January 2016 Rain Water Test Report.


January 2016 down pipe rain water filter test.

The background levels here went up significantly in late January 2016. There was 2.47 times as much rainfall in January 2016 (133.6 mm), compared to December 2015 (54mm). Even with the increased rainfall, the amount of Pb-210 captured for January and December in the rain water filter, was approximately the same. Pb-210 is the end product of radon daughter decay. There was more Beryllium-7 detected in January 2016. This was probably created for spallation in the upper atmosphere, by recent solar storm activity. No detectable Cesium is being detected in the rain water filter tests.

January 2016 rain water test chart



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Disclaimer: This is an amateur volunteer run service. Human error can provide incorrect information, and equipment malfunction can produce false readings. Do not rely on, or take action upon information presented on this web site, without further research. Views expressed in the pages or images on the SCCC Inc., site maybe the personal opinions of the relevant writers, and are not necessarily representative of those of SCCC Inc.