Here's an abstract from the researcher, Tsanangurayi Tongesayi. Not this exact presentation, but apparently the same research:
Lead was present in all the foods samples and its concentration ranged from 4.3 to 17.9 µg/g. Some baby rice food had levels of Pb as high as 12.5±0.2 µg/g.
http://webcache.googleusercontent.com/search?q=cache:d4lyxhr...
(Google Cache because of the intellectual property circus).
The FDA's recommended limit, expressed in total Pb ingested per day (only figure I could find), is
The FDA’s recommended Provisional Total Tolerable Intake Level (PTTIL) for lead in children less than 6 years of age is 6 μg lead/day. For children 7 years and older, the PTTIL is 15 μg lead/day. It increases to 75 μg lead/day for adults (USFDA 1993).
http://health.mo.gov/living/environment/hazsubstancesites/pd...
This limit can be exceeded with a fraction of a gram of rice (for small children) -- literally a single grain. You could eat a small bullet's weight of lead in a few hundred kg -- several years of eating.
And here's an FDA survey of the US food supply: 731 food products, about 10,000 samples, and nothing within orders of magnitude of this.
http://www.fda.gov/downloads/Food/FoodScienceResearch/TotalD...
(pp. 69-80). Notably, their rice samples (#50) had undetectable amounts of lead, at a detection threshold of 0.007 mg/kg (= µg/g).
(I'm beginning to suspect someone confused a mg/mcg/μg somewhere; that seems like the Occam's razor explanation. Otherwise, this looks really bad).