Appendix Table 3c. Summary for California data of performance with regard to QC 
criteria for analysis of reference materials, matrix spike recoveries, and relative 
percent difference or coefficient of variation (RPD, CV) of replicates. SRM = 
Standard Reference Material, CRM = Certified Reference Material, LCM = 
Laboratory Control Material, NA = not applicable, none = this QC material was 
not analyzed or QC activity not done. Those values in red are averages failing 
DQO, borderline average values, or a significantly reduced number of analytes 
were reported. 
California 2003 
Analytes (#) Matrix 
Referen 
average re 
±30% ( 
±20 
of true ve 
individual 
of tru 
DQO 
met? 
ce Materials 
acovery within: 
irganics and 
% metals 
alue*; 70% of 
s within ±35% 
e value** 
If no, 
average % 
different from 
true value 
(# analytes 
reported) 
Matrix 
spikes 
recovery 
DQO of 
50%- 
120% 
met? 
RPDs and 
CVs 
of Matrix 
spikes and 
Reference 
Materials 
met DQO of 
average 
<30%? 
PAHs (22) 
Sediment 
yes 
NIST 1944 
(18) 
yes 
(22) 
yes 
Tissue 
NA 
NA 
NA 
NA 
Metals 
Sediment (15) 
yes 
016-050 
(11) 
yes 
(15) 
yes 
Tissue (13) 
yes 
DORM-? 
(10) 
none 
yes 
PCBs (21) 
Pesticides (20) 
Sediment 
yes 
NIST 1944 
(19) 
yes 
(18) 
yes 
Tissue 
yes 
CARP-2 
(17) 
none 
yes 
Sediment 
yes 
NIST 1944 
(6) 
yes 
(19) 
yes 
Tissue 
yes 
CARP-2 
(6) 
none 
yes 
128 
