DesertLily, you peaked my curiosity. A web search finds that, yes, there is a test for calcium in urine (24 hour collection sample), and yes, the kidneys do excrete calcium to some extent. Whether this daily loss is much or little I don't know, but it means that there is going to be at least some bone loss over time. Another concern is that high levels of calcium in the blood promote kidney stones, but a fast lasting no more than a few weeks might not be long enough to cause them. At age 70 I am maybe more concerned about bone loss than someone younger. Of course, I expect the calcium to be restored now that the fast is over. Eat lots of oranges and green leaves.

A level only one tenth of a point greater than a statistically (and lab determined) normal upper value is not very alarming, given that these values are usually given for normal body functioning and not fasting state. Calcium being the case, the body certainly moves it around during a fast - from places where it doesn't belong anymore, like old inflammation sites where it used to neutralize acidity, from bone spurs and other tissue calcifications back to the bones. I would not be too afraid of such minute change in your calcium levels; or maybe would - if your calcium was really low before starting the fast.
I went back in the thread to check your urine pH. 5.5 is still in the normal range. It can go down 4.5-4.6 and still be considered normal. Same thing, these are values for normal conditions. Although, I agree with your cautious approach, since as you mentioned, no medical supervision is available to check on your fasting process. And I do agree that any disciple of natural hygiene knows better than having chronically acidic urine pH under normal conditions. In fact if the body does not overwork itself onto its way up to a slightly alkaline pH, the urine should be neutral or slightly alkaline.
Please, do not forget magnesium and sun exposure for the calcium to get where it belongs - the bones, now that you are ending your fast.

Probably the best solution in eliminating heavy metals is via chlorella, PureH20..........................
http://www.naturalnews.com/027361_chlorella_natural_detox.html

The product I mentioned has turned peoples lives around, because the benefits to health are astounding and almost miraculous. I have never felt so well with a superabundance of energy and my PN is improving in leaps and bounds: my tactile sensation is recovering on a daily basis and the numbness I have felt in the most sensitive areas is reverting to what it should be.
Bear in mind that I have adhered to a strict, wholesome, plant-based diet for years and mostly organic.
Food for thought perhaps.?

Take care and keep us updated.

Chrisb1