Table 7 (cont'd).
d. Statistical analysis of TNT concentrations (g/g) for dis-
crete and composite samples from sampling location 7R.
Discrete samples
On-site analysis
Laboratory total
Sample
Mean
Mean of logs
Mean
Mean of logs
1
82,000a†
4.914a
109,000a
5.034a
2
21,700c
4.337c
40,300c
4.604c
3
38,700b
4.587b
71,600b
4.854b
4
76,200a
4.882a
119,000a
5.076a
5
71,300a
4.853a
101,000a
5.006a
6
78,200a
4.890a
100,000a
5.000a
7
34,100b
4.533b
67,500b
4.829b
† Numbers designated with the same letter are not significantly different at
the 95% confidence level.
ANOVA for on-site and lab analyses
Untransformed
On-site
Lab
F ratios
47.8***
39.0***
Error MS
26,175,779
39,933,637
Least sign. diff.
12,097
14,943
Analysis s
5,120
6,320
Sampling s
24,700
27,560
(s = standard deviation)
Linear correlation analysis for on-site analysis vs. lab analysis
(r = correlation coefficient)
Slope
Intercept
r
untransformed, non-zero intercept
0.860
17,291
0.960
untransformed, zero intercept
0.677
0
0.936
Results of paired t-tests for on-site vs. lab results
Means of seven discrete samples, t = 9.55***
Composite samples
On-site analysis
Laboratory total
n
7
7
mean value
55,200
107,000
standard deviation
5,840
7,520
RSD
10.6%
7.05%
ANOVA comparing on-site and lab analyses
F ratio = 209***
* Significant at the 95% level
*** Significant at the 99.9% level
** Significant at the 99% level
NS Not significant at the 95% level
e. Analytical results for stones separated from soils from sampling loca-
tions 7 and 7R during laboratory homogenization.
Stones
Soil
TNT
TNT
Sample
Discrete
Weight
concentration
Weight
concentration
(g/g)
(g/g)
location
sample no.
(g)
(g)
7
4
9.44
6,025
8.93
106,000
8,150
102,000
7R
4
10.70
7,125
10.10
120,000
6,500
119,000
27
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