TABLE B6. Ch a ra cteristics of QC/ QA ra tios for a rch ived explosives results for soils.
RDX
1,3,5-TN B
1,3-DN B
2,4,6-TN T
2-A m-DN T
2,4-DN T
Summa ry
Number of pa i rs of
3
13
3
21
14
11
65
rea l va l ues
N umber a nd % ra t i os
out si de t h e l i mi t s
1 (33%)
2 (15%)
0 (0%)
3 (14%)
0 (0%)
1 (9%)
7 (10.8%)
of 0.254.00
N umber a nd % ra t i os
1 (33%)
9 (69%)
3 (100%)
15 (71%)
8 (57%)
5 (45%)
41 (63.0%)
numeri ca l l y < 1.00
Ta ble B7. Summa ry of QC/ QA concentra tion ra tios for nine VOCs in groundwa ter.
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
Pe rce nt
(outsi d e
re ta i ne d
l i mi ts on
l i mi ts f or
outsi d e
Comp ound
QC/ QA
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
B enzene
46
2
4.3
1.03
0.931.14
0.422.51
1
Ch l oroform
26
2
7.7
1.07
0.971.17
0.572.00
0
Et h yl benzene
37
0
0.0
1.11
0.981.25
0.413.01
0
Tet ra ch l oroet h ene
19
0
0.0
0.97
0.841.12
0.412.30
1
Tol uene
36
3
8.3
1.02
0.871.18
0.343.09
0
1,2-Di ch l oroet h ene
44
0
0.0
0.91
0.821.00
0.392.09
0
Tri ch l oroet h ene
63
2
3.2
0.94
0.891.00
0.521.70
1
V i nyl Ch l ori de
9
0
0.0
0.95
0.671.34
0.214.27
0
Xyl ene
41
2
4.9
1.09
0.951.26
0.343.50
0
Tot a l = 321
Tot a l = 11 Avg = 3.2%
Avg = 1.01
Tot a l = 3
Ta ble B8. Distribution of VOC sa mples a ccording to th e number of a na lytes present a nd th e number of QC/ QA ra tios
outside 0.402.50.
N o. of sa mp l e s w i th ra ti os outsi d e 0.402.50
N o. a na l y te s a bov e
Di stri buti on of sa mp l e s
re p orti ng l i mi ts f or
a ccord i ng to numbe r of
both QC a nd QA
a na l y te s a bov e re p orti ng
One outl i e r
Tw o outl i e rs
p e r sa mp l e
l i mi ts p e r sa mp l e
0
13
0
0
1
50
0
0
2
32
3
2
3
32
5
0
4
21
3
1
5
5
1
0
>5
0
0
0
Tot a l = 153
Tot a l = 12
Tot a l = 3
30
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