Current through August 26, 2024
(1) GENERAL
PROVISIONS. When an initial instrument calibration is not performed on the day
of analysis, the continuing validity of the initial calibration shall be
verified prior to analyzing any batch quality control or environmental samples
by the analysis of one or more CCV standards, subject to all the following:
(a) Except for multi-peak analytes, CCV
standards shall contain all analytes to be reported and may be prepared from
the same standards used to generate the initial calibration. CCV standards are
required for multi-peak analytes when the analytes are detected and reported in
the samples.
(b) CCV standards
shall be treated the same as the standards used in the initial calibration.
When the method requires that the standards be treated the same as samples, the
CCV standards shall be performed with the associated batch so that the CCV
standards and samples are all processed together.
(c) Continuing calibration verification is
not required for technologies when there are no initial calibrations
established.
(d) If an LCS also
serves as a CCV standard, the acceptance criteria of the CCV standard shall be
used.
(2) FREQUENCY.
(a) Continuing calibration verification shall
be performed at least once on each analysis day when an initial calibration is
not performed and prior to sample analysis and batch quality control
analysis.
(b) Continuing
calibration verification shall be performed after the consecutive analysis of
each group of 20 environmental samples, if 20 or more samples constitute an
analytical batch, unless otherwise required by method, regulation, or covered
program.
(3) MINIMUM
NUMBER OF STANDARDS AND CONCENTRATION LEVELS.
(a) For linear and quadratic model
calibration functions, the laboratory shall a
Note: Linear calibration models include
electrometric technologies (pH and ion selective electrode), average response
factor, average calibration factor, linear regression, and least squares
analysis.
nalyze at least a single CCV standard. The concentration of the
standard shall be within the range established during the initial
calibration.
(b) For cubic model
calibration functions or third order polynomials, the laboratory shall analyze
at least two CCV standards in each instance when a single CCV standard is
required by method, regulation, or covered program.
(4) VERIFYING ACCURACY.
(a) Unless otherwise required by method,
regulation, or covered program, the acceptance criteria for CCV standards shall
be within 10% of the theoretical concentrations of all reportable inorganic
analytes from an initial calibration.
(b) Unless otherwise required by method,
regulation, or covered program, the acceptance criteria for CCV standards shall
be within 20% of the theoretical concentrations of all reportable organic
analytes from an initial calibration.
(5) ACCURACY CORRECTIVE ACTION.
(a) When a CCV standard fails, the laboratory
shall do any of the following:
1. Perform
corrective action and reanalyze the CCV standard. If the CCV standard does not
pass, an initial calibration shall be performed.
2. Perform a second consecutive (immediate)
CCV standard under the same conditions. If the second CCV standard also fails,
then corrective action shall be performed and two consecutive CCV standards
shall pass or an initial calibration shall be performed.
(6) EVALUATING SENSITIVITY. When
the method requires that the standards be treated the same as the samples and
when the method requires a CCB, the CCB shall be performed with the associated
batch so that the CCB and samples are all processed together. The CCB is
processed at the same frequency as the CCV standard. The CCB is subject to the
same criteria specified in s.
NR 149.48(5)
(d).
