Here is what one would expect a modern clearance test would look like in 2018.

I share this with my readers as a basis for comparison with the clearance test report for Lewis Elementary School that I posted earlier today. Please read this post here for context.

Important points to note:

  1. This is a summary of testing that was done on a single family dwelling in August of 2017. [I am going to follow up with the family today to confirm the square footage of their home.]
  2. This test report states that it used current HUD guidelines as a basis for testing and determinations.
  3. This is a report for a standard (not large) single family dwelling.
  4. In the interest of truly protecting the children in the home, 18 dust samples were taken at the home to be thorough and complete.
  5. The low threshold of detection for all samples taken that were one square foot or more was at or below 5 micrograms of lead dust per square foot. [Marked by me with RED STARS.]
  6. The only samples that had a higher threshold of detection were samples where it was not possible to get a full square foot, which impacted the accuracy level. [Marked by me with BLUE OVALS.]
  7. Of the areas that test positive for lead in the dust, the lowest positive reading was as specific as “10.3 micrograms of lead per square foot”. [Marked with YELLOW RECTANGLES.]
  8. This report demonstrates that it is possible and reasonable to expect a hazard assessment or clearance test to give results as low as 10 micrograms per square foot and that it is possible and reasonable to expect the low threshold of the limit of detection for such a test to be “at or below 5 micrograms of lead dust per square foot” in all cases where it is possible to take a full square foot sample.

As always, please let me know if you have any questions.

Tamara Rubin


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