Ta ble B4. Ch a ra cteristics of QC/ QA ra tios for a rch ived VOC results for soils.
Eth y l -
Xy l e ne s
be nze ne
Tol ue ne
(tota l )
V a ri ous*
Summa ry
Number of pa i rs of rea l va l ues
25
35
36
38
134
N umber a nd % ra t i os
out si de t h e l i mi t s of 0.254.00
11 (44%)
14 (40%)
18 (50%)
13 (34%)
56 (42%)
N umber a nd % ra t i os
out si de t h e l i mi t s of 0.205.00
11 (44%)
12 (34%)
12 (33%)
11 (29%)
46 (34%)
N umber a nd % ra t i os
out si de t h e l i mi t s of 0.1010.0
9 (36%)
6 (17%)
9 (25%)
8 (21%)
32 (24%)
* Consi st s of ei gh t benzene, one ch l oroform, fi ve 1,2-di ch l oroet h ene (t ot a l ), t wo met h yl et h yl ket one,
el even t et ra ch l oroet h ene, a nd el even t ri ch l oroet h ene ra t i os.
Ta ble B5. Ch a ra cteristics of a rch ived tota l petroleum h ydroca rbon (TPH) results from NPD a nd MRD.
N PD re sul ts
MRD re sul ts
QC1
QC
QC
QC2
QA
QA
Number of pa i rs of rea l va l ues
83
95
61
N umber a nd % ra t i os
out si de t h e l i mi t s of 0.254.00
5 (6.0%)
13 (13.7%)
28 (45.9%)
Geomet ri c mea n of ra t i os
wi t h i n t h e l i mi t s of 0.254.00
0.95
0.98
*
95% confi dence l i mi t s on mea n
0.841.07
0.841.15
*
99% t ol era nce l i mi t s a round mea n
0.224.07
0.166.15
*
* Not ca l cul a t ed due t o ext remel y l a rge % of va l ues out si de t h e ra nge of 0.254.00.
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