# Results

## Chemical Group:Organochlorine Pesticides

• Measured in: Serum

### Project: Biomonitoring Exposures Study (BEST) - 1.Pilot

95% Confidence Interval Selected Percentiles
Chemical measured Indicates exposure to Units Number of people tested Geometric mean Lower Upper 25th 50th 75th 95th Detection frequency Limit of Detection (LOD), wet-weight Notes
beta-Hexachlorocyclohexane (beta-HCH) b-HCH ng/g lipid 110 7.00 5.42 9.05 2.98 5.94 11.5 115 89.1% 0.00800 ng/mL

### Project: Firefighter Occupational Exposures (FOX) Project

95% Confidence Interval Selected Percentiles
Chemical measured Indicates exposure to Units Number of people tested Geometric mean Lower Upper 25th 50th 75th 95th Detection frequency Limit of Detection (LOD), wet-weight Notes
beta-Hexachlorocyclohexane (beta-HCH) beta-HCH ng/g lipid 101 2.19 2.00 2.41 1.68 2.23 2.83 4.64 97.0% 0.005 ng/mL

### Footnotes

# As of March 2013, PFBuS is no longer measured due to instrumental background interference.
**LOD changed during the time that samples were analyzed for this project.
*Geometric mean was not calculated because the chemical was found in less than 65% of the study group
*Geometric mean was not calculated because the chemical was found in less than 65% of the study group.
^Concentrations were adjusted for specific gravity using a reference value of 1.017 from NHANES 2007-2008.
§Summary statistics were based on 155 urine samples collected from 40 children.
ΔTwo samples were damaged during processing and could not be tested.
†Summary statistics were based on 138 urine samples collected from 38 adults.
‡Summary statistics were based on 150 urine samples collected from 40 adults.
♢Summary statistics were based on 168 urine samples collected from 40 children.