Petroleum hydrocarbon, BTEX and PAH testing in soil, water and oil
TCEQ Method 1005 is the Texas method for total petroleum hydrocarbons: an n-pentane extraction and GC-FID with n-alkane markers at nC6, nC12, nC28 and nC35 so the data user can see the carbon-range distribution. We run 1005 with the chromatogram on the certificate, then BTEX by GC-MS and the 16 priority PAHs where the >nC12 range triggers them.
- Pricing
- Quote on request
- Turnaround
- 5–7 business days
- Certificate
- Public, hashed, video-linked
Contact us to confirm the sample matrix, analytical scope and price before shipping.
What the panel measures
| Test | Method | Instrument | Reports as |
|---|---|---|---|
| Total petroleum hydrocarbons | MethodTCEQ Method 1005, n-pentane extraction, GC-FID, carbon-range markers | InstrumentAgilent GC-FID | Reports asmg/kg or mg/L by range; MRL 50 mg/kg soil, 5 mg/L water |
| TPH fractionation | MethodTCEQ Method 1006 aliphatic/aromatic | InstrumentAgilent GC-FID | Reports asmg/kg by fraction; add-on |
| BTEX and MTBE | MethodEPA 8260 purge-and-trap GC-MS | InstrumentAgilent GC-MS with headspace | Reports asµg/kg or µg/L |
| PAH 16 | MethodEPA 8270 SIM GC-MS | InstrumentAgilent GC-MS with headspace | Reports asµg/kg or µg/L; quoted add-on |
| Metals | MethodEPA 200.8 / 6020 ICP-MS | InstrumentAgilent 7850 ICP-MS | Reports asmg/kg or µg/L; add-on |
Accepted: Soil, 250 g in glass Groundwater, 2 × 1 L amber Fuels and used oil Sediment Wastewater
Compounds: TPH nC6–nC12, >nC12–nC28, >nC28–nC35 Benzene, toluene, ethylbenzene, xylenes MTBE 16 EPA priority PAHs Naphthalene
Why the method matters
Carbon-range chromatogram on the certificate
Method 1005 exists to show the distribution, not one number. We print the FID trace with the alkane markers so a reviewer can see gasoline from diesel from lube oil at a glance.
PAHs by SIM, as TCEQ recommends
TCEQ guidance recommends 8270 in selected-ion-monitoring mode to minimize false positives at action levels. We run SIM by default.
Authentic Agilent bench, OEM consumables
Every instrument was bought new through Agilent, Charles River and MilliporeSigma authorized channels, installed and performance-qualified by certified engineers, and serviced by Quantum Analytics. Columns, lamps, seals, cartridges, canisters and reference standards are OEM or Thermo Fisher lot-traced; no third-party refills, no re-used cartridges, no expired lysate. The instrument ID, column lot and standard lot are printed on every certificate.
The bench this runs on
Agilent GC-FID
Total petroleum hydrocarbons by carbon range, TCEQ 1005.
Agilent GC-MS with headspace
Volatiles, residual solvents, BTEX and semivolatiles by EI mass spectrometry.
Agilent 7850 ICP-MS
Elemental impurities and toxic metals to sub-ppb, internal-standardized.
Purchased new through authorized channels, installed and performance-qualified by certified engineers, run on OEM consumables. Instrument IDs are printed on every certificate. See the full bench.
Hydrocarbon testing compared
| Gold Standard Analytics | Typical | |
|---|---|---|
| TCEQ 1005 with markers on certificate | Gold Standard AnalyticsYes | TypicalNumber only |
| PAH by 8270 SIM | Gold Standard AnalyticsDefault | TypicalFull-scan |
| Turnaround | Gold Standard Analytics5–7 days, guaranteed | Typical10–15 days typical |
| Public certificate | Gold Standard AnalyticsYes | TypicalNo |
Named, sourced comparisons with individual laboratories are on the compare page.
Questions about hydrocarbons testing
Can I see the video of my sample being opened?
Yes. Every package is opened on camera, each container is photographed, and the footage is linked to your accession. Custody video and photos are kept for three years; the retained sample itself is kept 90 days for guarantee retests.
What happens if my result fails?
It is published like any other result, with the method, instrument and specification shown. You may order a retest of the retained sample; we never re-run to obtain a better number.
Is TCEQ 1005 accepted for PST closure?
Method 1005 is the TCEQ TPH method for the PST program; 418.1 and 8015 data are not accepted after 2001. Confirm program-specific requirements with your TCEQ project manager; we are not NELAP-accredited.
How should I collect water samples?
Two 1 L amber glass bottles, preserved as directed on the label, on ice, received within 48 hours.
When are PAHs required?
TCEQ guidance calls for PAH analysis on the highest >nC12 sample per source area when that range is detected.
Method references: TCEQ Method 1005 Rev 03 · TCEQ RG-411 PST guidance, PAH by 8270 SIM
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Confirm testing scope
Contact us to confirm the sample matrix, analytical scope and price before shipping.