Fentanyl Concentrations (ng/mL)   CB PB C/P Ratio N 179 179 179 Min 1.8 1.7 0.03 Max 176 373 15.19 Mean 20.61 20.46 1.55 Median 13 11 1.09   Standard Deviation 1.78

Table 1: Summary of 179 fentanyl positive cases from the Los Angeles County Department of Coroner.