Draft Data Validation Plan Review Form Page 16
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29Draft Data Validation PRF-Tier II
Date: March 2, 2004
Page 16
Revision: 4.0
2.0
Semi-Volatile Data Review - Continuing Calibration Verification
Continuing Calibration Verification
A mid-range continuing calibration standard containing all calibration compounds and surrogates must be analyzed every 12
hours following analysis of the instrument performance check sample and before the analyses of method blanks and samples.
This is termed the 12-hour standard. In addition, a continuing calibration verification (CCV) must be analyzed once per batch
or every 20 samples, which ever is more frequent (some labs just refer to their 12-hour standard as a CCV). The continuing
calibration standards must all have Relative Response Factors (RRFs) greater than or equal to 0.05 and %D between the initial
calibration average RRF and the continuing calibration verification (CCV) RRF must be within +/- 25%. The Tier II Data Validator
must verify that the continuing calibration was analyzed at the proper frequency and in the proper sequence. In addition, at
least one target compound’s continuing calibration RRF should be recalculated and compared to the reported result.
2.1
Has a mid-point calibration standard (a.k.a. 12-hour
standard or CCV) been analyzed for every 12 hours of
sample analysis?
Action: List all samples analyses that were not within 12 hours of
the previous continuing calibration analysis. Call the laboratory for
an explanation or for re-submission of the data. If continuing
calibration data are not available, flag all associated sample data
as “R.”
2.2
Continuing calibration RRFs for the semi-volatile target
compounds in the 12-hour standard listed in question 1.4
must be greater than or equal to 0.01. The RRF for all
other semi-volatile target compounds and surrogates
must be greater than or equal to 0.05.
Action: If any semi-volatile target compound has an RRF value
less than the minimum criterion (0.01 for the “poor performers” and
0.05 for all other semi-volatile compounds), use professional
judgment for positive results, based on mass spectral
identification, to qualify the data as “J” or “R.”
If any semi-volatile target compound has an RRF value less than
the minimum criterion (0.01 for the “poor performers” and 0.05 for
all other volatile compounds), qualify non-detected compounds as
“R.”
2.3
The Percent Difference (%D) between the average initial
calibration RRFs and the 12-hour standard RRF must be
within ± 50.0 % for the semi-volatile target compounds
and surrogates listed in question 1.4. The %D for all
other semi-volatile target compounds and surrogates
must be within ±25.0%, except for 2,4-Dinitrotoluene, 2-
Nitrophenol, and 2,4-Dimethylphenol, for which the %D
must be within ±30.0%.
Action: If %D value for any of the semi-volatile target “poor
performers” is outside the ±50.0% criterion, qualify positive results
with “J” and non-detected compounds “UJ.”
If %D value for 2,4-Dinitrotoluene, 2-Nitrophenol, and 2,4-
Dimethylphenol is outside the ±30.0% criterion, qualify positive
results with “J” and non-detected compounds “UJ.”
If %D value for any other semi-volatile target compound is outside
the ±25.0% criterion, qualify positive results with “J,” and non-
detected compounds as “UJ.”
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