Halogenated and Aromatic Volatile Organic Compounds (VOCs) by Gas Chromatography SW-846 Methods 8010a and 8020a or Method 8021a


HALOGENATED AND AROMATIC VOLATILE ORGANIC COMPOUNDS (VOCs) BY GAS
CHROMATOGRAPHY
SW-846 Methods 8010A and 8020A or Method 8021A
Table 1A. Summary of Holding' Times and. Preservation for Halogenated and
Aromatic Volatile Organic Compounds by Gas Chromatography
Analytical
Parameter a
Technical and Contract
Holding Times
Preservation
Volatile Organic
Compounds (VOCs)
in Water
Technical: 7 davs from
collection;
Contract: 5 davs from
receipt at laboratory
Cool to 4°C ±2°C;
VOCs in Water
Technical: 14 davs from
collection;
Contract: 10 davs from
receipt at laboratory
HC1 to pH <2;
Cool to 4 ° C ±2 ° C
VOCs in Soil
Technical: 48 hours
Contract: 48 hours
Cool to 4°C ±2°C; sealed zero
headspace containers;
freezing can extend the
holding time b
VOCs in Soil
Technical: 14 davs from
collection;
Contract: 10 davs from
receipt at laboratory
Preserved samples: in
methanol c or sodium bisulfate
d
a Individual target compounds are listed in Tables IB and 1C.
b Freezing the sample can extend the holding time; however, 48 hours unfrozen
holding time will be considered cumulative.
c Use Method 5030 for purge and trap.
d Use Method 5035 for purge and trap.
pH of each sample must be recorded and reported with sample results.
Data Calculations and Reporting Units:
Calculate the calibration factors (CFs) and the concentration of individual
analytes according to the equations specified in Sections 7.4.2 and 7.10.1,
respectively, of Method 8000B. Report water sample results in concentration
units of micrograms per liter (/ig/L) . Report soil sample results on a dry-
weight basis in micrograms per kilogram (/ig/kg) . Report percent solid and
percent moisture to the nearest whole percentage point.
For rounding results, adhere to the following rules:
a)If	the number following those to be retained is less than 5, round down;
b)If	the number following those to be retained is greater than 5, round up; or
c)If	the number following the last digit to be retained is equal to 5, round
down if the digit is even, or round up if the digit is odd.
All records of analysis and calculations must be legible and sufficient to
recalculate all sample concentrations and QC results. Include an example
calculation in the data package.
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Table IB. Target Compound List, CAS Numbers, and Contract Required
Quantitation Limits for Halogenated Volatile Organic Compounds by
Gas Chromatography
SW-846 Method 8010A or 8021A
Coirroound
CAS Number
CRQL
(,ug/L or jUg/kg)
Benzyl chloride
100-44-7
1
Bromobenzene
108-86-1
1
Bromodi chloromethane
75-27-4
1
Bromoform
75-25-2
1
Bromomethane
74-83-9
1
Carbon tetrachloride
56-23-5
1
Chloroethane
75-00-3
1
2-Chloroethylvinylether
110-75-8
1
Chloroform
67-66-3
1
Chloromethane
74-87-3
1
Dibromochloromethane
124-48-1
1
Dibromomethane
74-95-3
1
Dichlorodi fluoromethane
75-71-8
1
1,1-Dichloroethane
75-34-3
1
1,2-Dichloroethane
107-06-2
1
1,1-Dichloroethene
75-35-4
1
trans-1,2-Dichloroethene
156-60-5
1
1,2-Dichloropropane
78-87-5
1
ci s-1,3-Dichloropropene
10061-01-5
1
trans-1,3-Dichloropropene
10061-02-6
1
Methylene chloride
75-09-2
5
1,1,2,2-Tetrachloroethane
79-34-5
1
1,1,1,2-Tetrachloroethane
630-20-6
1
Tetrachloroethene
127-18-4
1
1,1,1-Trichloroethane
71-55-6
1
1,1,2-Trichloroethane
79-00-5
1
Trichloroethene
79-01-6
1
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Trichlorofluoromethane
75-69-4
1
1,2,3-Trichloropropane
96-18-4
1
Vinyl chloride
75-01-4
1

Additional Compounds:
1,2-Dibromo-3-chloropropane
96-12-8
1
1,2-Dibromoethane
106-93-4
1
1,3-Dichloropropane
142-28-9
1
Dichlorofluoromethane
75-43-4
1
Table 1C. Target Compound List, CAS Numbers, and Contract Required
Quantitation Limits for Aromatic Volatile Organic Compounds by Gas
Chromatography
SW-846 Method 8020A or 8021A
Compound
CAS Number
CRQL
(jtfg/L or jUg/kg)
Benzene
71-43-2
1
Chlorobenzene
108-90-7
1
1,2-Dichlorobenzene
95-50-1
1
1,3-Dichlorobenzene
541-73-1
1
1,4-Dichlorobenzene
106-46-7
1
Ethylbenzene
100-41-4
1
Toluene
108-88-3
1
Xylenes (Total)
1330-20-7
1
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Table 2. Summary of Calibration Procedures for Halogenated and. Aromatic Volatile Organic Compounds by Gas
Chromatography
Calibration Element
Frequency
Acceptance Criteria
Corrective Action
Initial Calibration
(minimum blank + 5
points for each
analyte) (ICAL)3' b' c
Initially; whenever
required, due to
failure of CCV
RSD for CFs <30%;
or, correlation
coefficient (r) of linear
regression >0.99
1.	Terminate analysis
2.	Recalibrate and verify
before sample analysis
Continuing
Calibration
Verification (CCV)
Daily, every 12-hour,
every ten samples,
and end of run
%D between CF of CCV and
avg CFs from ICAL <±25%
1.	Recalibrate and verify
2.	Reanalyze samples back to
last good CCV
Retention time
evaluation of CCV
standards
Each analysis of CCV
standard
±3 x the SD of the avg
ICAL RT for each analyte
1.	Re-calibrate and verify
2.	Re-analyze samples back to
last good CCV
a The ICAL low standard must be above but near the CRQL. The low ICAL standard must have a signal to noise
ratio >5:1. If this requirement cannot be met, the laboratory must submit a MDL study as part of the data
package.
b ICAL and continuing CAL standards must contain all target analytes listed in Table IB.
c Report the retention time window for each analyte. Determine retention time windows as ±3 x the standard
deviation of the average initial calibration retention time for each analyte.
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Table 3. Summary of Internal Quality Control Procedures for Halogenated and. Aromatic Volatile Organic
Compounds by Gas Chromatography
QC Element
Frequency
Acceptance Criteria
Corrective Action
Method Blank
(MB)
Each 12-hour time
period, minimum of
one per SDG a
< CRQL for each compound
1. Investigate the source of
contamination and document.
2. Reanalyze all samples
processed with a blank that is
out of control.
Instrument
Blank
After any sample
which contains a
target compound
concentration >50
PPb
< CRQL for each compound
1. Investigate the source of the
problem and document.
2. Acceptance criterion must be
met before proceeding with
further analysis, in order to
demonstrate that there is no
analyte carryover.
Surrogate
Spikes b
Every sample,
standard and
method blank
Water Samole: 75-125% of
expected value
Soil Samole: 65-135% of
expected value
1. Reanalyze all samples with
non-compliant surrogate
recoveries
Matrix Spike
and Matrix
Spike Duplicate
(MS/MSD) c
One MS/MSD set per
batch or SDG (1
MS/MSD set per 20
samples minimum)
Water Samole: 75-125% of
expected value;
Soil Samole: 65-135% of
expected value;
<30% RPD between MS and MSD
1. Report in case narrative
a SDG - Sample Delivery Group - each case of field samples received; or each 20 field samples within a case;
or each 14 calendar day period during which field samples in a case are received.
b Surrogates: Halogenated compounds - 50 ng of one of the following three compounds: bromochlormethane, 2-
bromo-l-chloropropane, or 1,4-dichlorobutane.
Aromatic compounds - 50 ng of one of the following two compounds: 1,1,1-trifluorotoluene and 4-
bromofluorobenzene (BFB).
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c Spike MS/MSD with 10 ppb of the following halogenated and aromatic VOCs: 1,1-dichloroethene,
trichloroethene, chlorobenzene, toluene, and benzene.
Dilute and reanalyze samples which contain one or more target analytes at concentrations above the initial
calibration range. Results for such reanalyses should fall within the mid-range of the calibration curve.
Report results and submit documentation for both analyses.
Second column confirmation is required for all positive results. Confirmation must be performed on a column
of a phase different from that used for quantitation. Confirmation analyses must meet all calibration
criteria specified in Table 2 and blank acceptance criteria specified in Table 3.
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