About GDAT
GD Air Testing, Inc (GDAT) specializes solely on air sample analysis, mold, and other air related projects, a variety of air and gas samples using EPA, ASTM, NIOSH, and other methodologies. The full EPA compendium series such as TO-1, TO-2, TO-14, TO-14A, TO-15, and ASTM methodologies such as ASTM 1945, 1946, BTU calculation, etc., are mainstays of GDAT service offerings. GDAT is also state licensed for identification of mold spores through the Texas Department of Health.
One of the goals of GDAT is to provide the highest possible quality data. At GDAT, we are not interested in simply meeting the minimal requirements of the EPA methodologies. In most cases, we can far exceed these requirements.
GDAT Lab at a Glance
Our Lab Services
| Method | Major Target Compounds | Sampling Media | Report Limit |
| EPA TO-14 EPA TO-15 |
EPA TO-14 ,TO-15 VOCs Tentative Identified Compounds | Summa Canister, Tedlar Bags | 0.5ppbv |
| EPA TO-1
EPA TO-2 |
Aromatic Hydrocarbons, Chloro-compoundsVinyl Chloride, Highly Volatile non-polar organics |
Tenax Tubes
Charcoal Tubes |
0.5ppbv
0.2ppbv |
| TPH 8015 (GRO, DRO) |
Total Petroleum HC | Summa Canisters or Tedlar Bags | 1.0ppbv |
| BTEX-8020 (GRO, DRO) |
BTEX Compound | Summa Canister, Tedlar Bags | 0.5ppbv |
| EPA 5040 VOST | Individual VOCs by Client Specification | VOST | 0.2ppbv |
| EPA 5041 VOST | Light hydrocarbons C1-C6 | VOST | Call for more information |
| ASTM1945 | Light Hydrocarbons C1-C6 | Summa Canister and Tedlar Bag | 1.0ppmv |
| ASTM1946 | Fixed gases atmosphere gases
N2, O2, CO2, CH4, CO |
Summa Canister and Tedlar Bag | % Levels |
| EPA 25 | VOCs in Steam | 40mL VOA vial with PEG | 1.0 ppbv |
| EPA TO-12 | NMOCs | Summa Canister & Tedlar bag | 1.0 ppbv |
| Formaldehyde TO-11 |
Aldehydes and Ketones | DHP cartridge, sampling pump, flow meter, paint cans, activated charcoal | Call for more information |
| RSK-175 | Methane, Ethane, Ethylene and Carbon dioxide in Ground Water or Other Water | 40ml Vial | 0.5ppbw, 50ppbw CO2 |
| EPA 3810 | Methane & Light HC | 40mL VOA vial | 1.0 ppmv |
| EPA TO-13 | PAHs & Semi VOC Compounds | High or Low Volume PUF, XAD | Call for more information |
| EPA TO-4 | Organochlorine Pesticides and PCBs | High Volume PUF, XAD | Call for more information |
| EPA TO-10 | Organochlorine Pesticides and PCBs | Low Volume PUF, XAD | Call for more information |
| EPA 18 | Stack Samples Individual VOC | Summa Canister, Tedlar Bag, or Tube Cartridges | 0.2ppbv |
| Mold Analysis | Mold Spores | Bulk Samples Tape Lift Air Cassette |
13 s/m3@ 75L |
| Equipment Rental & Bag purchase | Canister FC Tedlar Bag |
3, 6 and 15 Liter 15 minute to 24 hrs 1, 3, 5 and 10 Liter |
See appropriate method Call for Pricing |
| GC/MSD SCAN | Library searches including list of Mercaptans | Summa Tedlar Bag |
1.0ppbv |
Lab Accreditation & Certification
TCEQ Certificate
Application Notes
Application Note by Using Nutech Preconcentrator System for PAMS Compounds in Lab Analysis
Abstract Using a three-stage cryogenic system + GC/MS technology (Full Scan and/or SIM) 57 PAMS target VOC compounds (PAMS Mix by Linde) in air will be analyzed in [...]
Application Note by Using Nutech Preconcentrator System for TX 85 Target Compounds in Lab Analysis
Abstract By Using three stage cryogenic preconcentration system + GC/MS technology (Full Scan and/or SIM) 85 TX (TCEQ) target VOC compounds (PAMS+TO-15 Mix by Linde and diluted by [...]
Application Note by Using Nutech 2104 Canister Clean System for Sample Train Clean and Certification
Abstract By Using Nutech 2104 Canister Clean System, users may do the sample train clean and certification at professional way. The 2104 supplies a pure gas fill and [...]
Application Note by Using Nutech 2203 Dilutor for Canister Humidification
Abstract By using Nutech 2203 Dilutor Liquid Injection function you may do the canister humidification quantitatively and easily. The humidification process will be controlled by computer program and [...]