HomeMy WebLinkAbout3- Appendix 3 EPA List of Volatile Organic Compounds VOLATILE ORGANIC COMPOUNDS (VOCs)
A
SW-846 Method 8260
Table IA. Summary of Holding Times and Preservation for Volatile Organic
Compounds by Gas Chromatographyll4ass Spectrometry
Analytical Technical and Contract Preservation
Parameter a Holding Times
Volatile Organic Technical: 7 days from Cool to 4•C ±2•C;
Compounds (VOCs) collection;
in Water Contract: 5 days from
receipt at laboratory
VOCs in Water Technical: 14 days from HC1 to pH <2;
collection; Cool to 4•C ±2•C
Contract: 10 days from
receipt at laboratory
VOCs in Soil Technical: 48 hours Cool to 4•C ±2•C; sealed
Contract: 48 hours zero headspace containers;
freezing can extend the
holding time b
VOCs in Soil Technical: 14 days from Preserved samples: in
collection; methanol ° or sodium
Contract: 10 days from bisulfate d
receipt at laboratory
a Individual target compounds are listed in Table 1B.
b Freezing the sample can extend the holding time; however, 48 hours unfrozen
holding time will be considered cumulative.
° Use Method 5030 for purge and trap.
d Use Method 5035 for purge and trap.
Data Calculations and Reporting Units:
Calculate the response factor (RF) and the concentration of individual
analytes according to the equations specified in Sections 7.3.4 of Method
8260. Report water sample results in concentration units of micrograms per
liter (•g/L) .
Report soil sample results on a dry-weight basis in micrograms per kilogram
(• g/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 Volatile Organic Compounds by Method 8260
Analyte CAS Number CROL •a/La CROL
a/Kab
Benzene 71-43-2 1 5
Bromobenzene 108-86-1 1 5
Bromochloromethane 74-97-5 1 5
Bromodichloromethane 75-27-4 1 5
Bromoform 75-25-2 1 5
Bromomethane 74-83-9 1 5
n-Butylbenzene 104-51-8 1 5
sec-Butylbenzene 135-98-8 1 5
tert-Butylbenzene 98-06-6 1 5
Carbon tetrachloride 56-23-5 1 5
Chlorobenzene 108-90-7 1 5
Chlorodibromomethane 124-48-1 1 5
Chloroethane 75-00-3 1 5
Chloroform 67-66-3 1 5
Chloromethane 74-87-3 1 5
2-Chlorotoluene 95-49-8 1 5
4-Chlorotoluene 106-43-4 1 5
1,2-Dibromo-3-chloropropane 96-12-8 1 5
1,2-Dibromoethane 106-93-4 1 5
Dibromomethane 74-95-3 1 5
1,2-Dichlorobenzene 95-50-1 1 5
1,3-Dichlorobenzene 541-73-1 1 5
1,4-Dichlorobenzene 106-46-7 1 5
Dichlorodifluoromethane 75-71-8 1 5
1,1-Dichloroethane 75-34-3 1 5
1,2-Dichloroethane 107-06-2 1 5
1,1-Dichloroethene 75-35-4 1 5
cis-1,2-Dichloroethene 156-59-2 1 5
trans-1,2-Dichloroethene 156-60-5 1 5
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1,2-Dichloropropane 78-87-5 1 5
2,2-Dichloropropane 594-20-7 1 5
1,3-Dichloropropane 142-28-9 1 5
1,1-Dichloropropene 563-58-6 1 5
Ethylbenzene 100-41-4 1 5
Hexachlorobutadiene 87-68-3 1 5
Isopropylbenzene 98-82-8 1 5
p-Isopropyltoluene 99-87-8 1 5
Methylene chloride 75-09-2 1 5
Naphthalene 91-20-3 1 5
n-Propylbenzene 103-65-1 1 5
Styrene 100-42-5 1 5
1,1,1,2-Tetrachloroethane 630-20-6 1 5
1,1,2,2-Tetrachloroethane 79-34-5 1 5
Tetrachloroethene 127-18-4 1 5
Toluene 108-88-3 1 5
1,2,4-Tri.chlorobenzene 120-82-1 1 5
1,2,3-Trichlorobenzene 87-61-6 1 5
1,1,1-Trichloroethane 71-55-6 1 5
1, 1,2-Trichloroethane 79-00-5 1 5
Trichloroethene 79-01-6 1 5
Trichlorofluoromethane 75-69-4 1 5
1,2,3-Trichloropropane 96-18-4 1 5
1,2,4-Trimethylbenzene 95-63-6 1 5
1,3,5-Trimethylbenzene 108-67-8 1 5
Vinyl chloride 75-01-4 1 5
o-Xylene 95-47-6 1 5
m-Xylene 108-38-3 1 5
p-Xylene 106-42-3 1 5
Methyl-t-butyl ether 163-40-44 1 5
Dichlorofluoromethane 75-43-4 1 5
a Based on 25 mL water purge. b Based on wet weight
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Table 2. Summary of Calibration Procedures for VOCs by SW-846 Method 8260
Calibration Element I Frequency Acceptance Criteria Corrective Action
GC/MS Tuning with BFB Beginning of each 12 Ion abundance criteria in 1. Identify the problem.
hour period during Table 4 of Method 8260 2. MS tune criteria must be
which standards met before any calibration
samples are analyzed standards, samples, blanks, or
QC samples are analyzed
Initial Calibration Initially; whenever RSD for RFs • 20%; 1. Terminate analysis
(minimum blank + 5 required, due to 2. Recalibrate and verify
points for each failure of CCV before sample analysis
analyte) (ICAL)a, b,
Continuing Following ICV, every %D between RF of CCV and 1. Recalibrate and verify
Calibration 12-hour, and end of avg RFs from ICAL • 15% 2. Reanalyze samples back to
Verification (CCV) run last good CCV
System Performance With ICAL or CCV RF for chloromethane, 1. Terminate analysis
Check Compound (SPCC) 1,1-dichloroethane, 2. Recalibrate and verify
bromoform, • 0.10; before sample analysis
chlorobenzene, 1,1,2,2-
tetrachloroethane, • 0.30
Calibration Check With ICAL or CCV RSD for RFs • 30% 1. Terminate analysis
Compounds (CCC) 2. Recalibrate and verify
before sample analysis
Internal Standards Each analysis of CCV -50 to +100% 1. Re-analyze all samples
analyzed while system was out-
of-control
Retention time Each analysis of CCV ±3 x the SD of the avg 1. Re-calibrate and verify
evaluation of CCV standard ICAL RT for each analyte 2. Re-analyze samples back to
standards 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 1B.
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 VOCs by SW-846 Method 8260
QC Element Frequency Acceptance Criteria Corrective Action
Method Blank Each 12-hour time < CRQL for each compound 1. Investigate the source of
(MB) period, minimum of contamination and document.
one per SDG a 2. Reanalyze all samples
processed with a blank that is
out of control.
Matrix Spike One MS/MSD set per Water Sample: 65-135% of 1. Report in case narrative
and Matrix batch or SDG (1 expected value; • 30% RPD
Spike Duplicate MS/MSD set per 20 between MS and MSD
(MS/MSD) samples minimum)
Soil Sample: 50-150% of
expected value; • 50% RPD
between MS and MSD
Surrogate Every sample, Water Sample: 85-115% except 1. Reanalyze all samples with
Spikes:b standard and for 1,2-dichloroethane (75- non-compliant surrogate
method blank 115%) of expected value recoveries
Soil Sample: 70-125% of
expected value
Laboratory One per SDG Water Sample: 70-130% of 1. Investigate the source of
Control Sample expected value problem and document.
(LCS) 2. Reanalyze all samples
Soil Sample: processed with a LCS that is out
65-135% of expected value of control.
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 Toluene-d8, BFB, 1,2-dichloroethane-d4, and Dibromofluoromethane
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.
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Report results and submit documentation for both analyses.
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