diff --git a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-10 Module 3.md b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-10 Module 3.md
index cd4b7f238..54103fc48 100644
--- a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-10 Module 3.md	
+++ b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-10 Module 3.md	
@@ -60,6 +60,6 @@ Interactions happen pretty fast. 1 millionth of a second the toxic products are
 Doseage - Chronic and acute. Acute is generally worse because the body can't repair itself.
 **LD50/30:** Dose of radiation expected to cause death to 50 percent of an exposed population within 30 days.
 # Module 3.3 - Radiation Protection Standards
-
+Background radiation is normally pretty low. mSv range.
 # Module 3.4 - Estimating Radiation Dose Rates
 # Module 3.5 - Radiation Shielding
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