Table 3 Summary statistics for selected pesticides and lead measured in soil samples collected from the participating childcare centers.

From: Pesticide, allergen, PCB, and lead measurements in childcare centers located on tribal lands in the Pacific Northwest, United States

Analyte

Number of Samples Above Reporting Limit

Percent Detect

Mean

STD

Geometric Mean

50th P

75th P

90th P

95th P

Max

Pesticides (n = 33; µg/kg)

 Bifenthrin

16

48

b

b

b

a

3

20

58

120

 Trifluralin

8

24

b

b

b

a

a

2.4

12

30

 Deltamethrin

4

12

b

b

b

a

a

2.4

24

32

 Chlorpyrifos

1

3

b

b

b

a

a

a

a

42

 Cyfluthrin

1

3

b

b

b

a

a

a

a

74

 cis-Permethrin

1

3

b

b

b

a

a

a

a

2.4

 trans-Permethrin

1

3

b

b

b

a

a

a

a

2.2

 Diazinon

0

0

b

b

b

a

a

a

a

a

Metal (n = 12; mg/kg)

 Lead

12

100

22

12

18

16

30

34

50

50

  1. aAt this percentile, all values were below the reporting limit.
  2. bStatistic not calculated.