9.2.3 Volatile Organic Compounds - Eleven laboratories
participated in a collaborative study of the use of the ZHE
with two waste types which were fortified with a mixture of
VOCs. The results of the collaborative study are shown in
Table 9. Precision results for VOCs tend to occur over a
considerable range. However, the range and mean RSD
compared very closely to the same collaborative study
metals results in Table 6. Blackburn and Show concluded
that at the 95% level of significance: 1) recoveries among
laboratories were statistically similar, 2) recoveries did
not vary significantly between the two sample types, and 3)
each laboratory showed the same pattern of recovery for
each of the two samples.