Draft Data Validation PRF-Tier II
Date: March 2, 2004
Page 9
Revision: 4.0
2.0
Volatile Organic Data Review - Continuing Calibration
2.9
The Tier II Data Validator should evaluate relative
response factors (RRFs) for the target compounds,
surrogates, 12-hour standards, and any batch specific
continuing calibration verification. The RRFs in the CCV
should be greater than 0.05.
Note: A 12-hour standard is needed once per day and a
continuing calibration verification is needed for each batch or
every 20 samples. The National Functional Guidelines (NFGs)
allow that any 2 volatile target compounds may fail to meet
minimum RRF or maximum %D criteria as long as they have
RRFs that are greater than or equal to 0.010, and %D of less
than or equal to 40.0 percent.
Action: If the RRF is less than 0.05, qualify all positive results as
“J” and all undetected compounds as “R.”
Table 2
Internal Standards (IS) and Associated Target Compounds for SW-846, Method 8260B
Bromochloromethane (IS)
1,4-Difluorobenzene (IS)
Chlo roben zene -d
(IS)
5
Chloromethane
1,1,1,-Trichloroethane
2-Hexanone
Bromomethane
Carbon Tetrachloride
4-Methyl-2-Pentanone
Vinyl Chloride
Bromodichloromethane
Tetrachloroethene
Chloroethane
Bromoform
1,1,2,2,-Tetrachloroethane
Methylene Chloride
1,2-Dichloropropane
Toluene
Acetone
Trans-1,3-Dichloropropane
Chlorobenzene
Carbon Disulfide
Trichloroethene
Ethylbenzene
1,1-Dichloroethene
Dibromochloromethane
Styrene
1,1-Dichloroethane
1,1,2-Trichloroethane
Total Xylenes
1,2-Dichloroethene(total)
Benzene
Bromofluorobenzene (surr.)
Chloroform
cis-1,3-Dichloropropene
Toluene-d
(surr.)
8
1,2-Dichloroethane
2-Butanone
1,2-Dichloroethane-d
(surr.)
4
3.0
Volatile Organic Data Review - Internal Standards
Internal Standards
Internal standards are the primary means of identifying and quantifying volatile organic compounds in samples. The evaluation
of internal standard data is therefore critical to data validation. Internal standards are added to each sample and all QC
samples and are evaluated in comparison to the initial calibration. Internal standard area counts must not vary by more than
a factor of two (-50 to +/- 100%) from the associated 12-hour calibration verification standard. In addition, the retention time
of internal standards must not vary by more than +/- 30 seconds from the associated 12-hour calibration verification standard.
The internal standards and their associated target compounds are listed in Table 2.