APPENDIX B: DATA FOR METALS, VOCS, TPH, AND EXPLOSIVES
Ta ble B1. Summa ry of As, Ba , Cr, a nd Pb concentra tion ra tios.
(a ) for duplica te QC sa mples
N o.
N o. of
p re v i ousl y
ra ti os
Ge ome tri c
95%
99%
a cce p te d
e xcl ud e d
me a n of
conf i d e nce
tol e ra nce
ra ti os
Tota l no.
(outsi d e
Pe rce nt
re ta i ne d
l i mi ts on
l i mi ts f or
outsi d e
of ra ti os
QC1/ QC2
0.303.00)
e xcl usi ons
ra ti os
me a ns
i nd i v i d ua l s
tol e ra nce s
El e me nt
As
60
1
1.7
1.06
1.011.13
0.532.11
2
Ba
60
1
1.7
0.97
0.911.03
0.531.77
1
Cr
60
0
0
1.01
0.941.09
0.492.10
2
Pb
53
1
1.9
1.05
0.981.12
0.571.93
1
Avg=1.3%
Avg=1.02
(b) for QC/ QA compa rison
N o.
N o. of
p re v i ousl y
ra ti os
Ge ome tri c
95%
99%
a cce p te d
Tota l no.
e xcl ud e d
me a n of
conf i d e nce
tol e ra nce
ra ti os
of ra ti os
(outsi d e
Pe rce nt
re ta i ne d
l i mi ts on
l i mi ts f or
outsi d e
El e me nt
QC1/ QC2
0.303.00)
e xcl usi ons
ra ti os
me a ns
i nd i v i d ua l s
tol e ra nce s
As
113
10
8.8
0.93
0.841.02
0.253.49
0
Ba
121
6
5.0
0.89
0.820.96
0.292.72
2
Cr
121
6
5.0
0.93
0.871.00
0.342.56
0
Pb
104
7
6.7
0.96
0.891.03
0.352.58
3
Avg=6.3%
Avg=0.93
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