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A lead paint test kit is not the same product as a lead water test. Lead based paint has 5000 ppm (parts per million) of lead [1] Water is considered unsafe a

A lead paint test kit is not the same product as a lead water test. Lead based paint has 5000 ppm (parts per million) of lead [1] Water is considered unsafe at levels over over 15 ppb (parts per (billion) [2] So her test kit is orders of magnitude more sensitive than a lead paint test kit, it's not even in the same ballpark. (if you're standing at home plate and her test kit is at first base, then the lead paint test kit would be over 5000 miles away) [1] https://www.hud.gov/sites/documents/20264_LEADSPEAK.PDF https://www.hud.gov/sites/documents/20264_LEADSPEAK.PDF [2] https://www.cdc.gov/nceh/lead/tips/water.htm https://www.cdc.gov/nceh/lead/tips/water.htm * I couldn't find any specs on the sensitivity of her product, so I used the EPA's cutoff for unsafe lead levels

voidmain 9y ago
> 5000 ppm > 15 ppb > if you're standing at home plate and her test kit is at first base, then the lead paint test kit would be over 5000 miles away Is there some way you could put this in terms of libraries of congress? Maybe if we laid them end to end?
- Johnny555 9y ago
  Sure, I'd be happy to, I thought LoC was only used as a unit of measurement on Slashdot. The LoC holds around 24M cataloged books [1] in its collections. So the difference between a lead paint detection kit and this project is like the difference between the LoC and a single bookshelf of 72 books. Or, if you prefer bigger numbers, the LoC has around 540 miles of shelf space [2], so if you laid out all the shelves end to end, it's like the difference between the shelves of the LoC versus shelves that span 180 million miles (greater than the distance between Mars and the Sun [3]) [1] https://www.loc.gov/about/general-information/ https://www.loc.gov/about/general-information/ [2] https://www.nps.gov/nr/travel/wash/dc79.htm https://www.nps.gov/nr/travel/wash/dc79.htm [3] Note: if you try to verify this, use caution, you'll need some sort of heat shielding on the shelves nearest the sun.

voidmain 9y ago

> 5000 ppm > 15 ppb > if you're standing at home plate and her test kit is at first base, then the lead paint test kit would be over 5000 miles away Is there some way you could put this in terms of libraries of congress? Maybe if we laid them end to end?

Johnny555 9y ago
Sure, I'd be happy to, I thought LoC was only used as a unit of measurement on Slashdot. The LoC holds around 24M cataloged books [1] in its collections. So the difference between a lead paint detection kit and this project is like the difference between the LoC and a single bookshelf of 72 books. Or, if you prefer bigger numbers, the LoC has around 540 miles of shelf space [2], so if you laid out all the shelves end to end, it's like the difference between the shelves of the LoC versus shelves that span 180 million miles (greater than the distance between Mars and the Sun [3]) [1] https://www.loc.gov/about/general-information/ https://www.loc.gov/about/general-information/ [2] https://www.nps.gov/nr/travel/wash/dc79.htm https://www.nps.gov/nr/travel/wash/dc79.htm [3] Note: if you try to verify this, use caution, you'll need some sort of heat shielding on the shelves nearest the sun.