MDL Studies
- 3810 Methane, Ethane, Ethene Headspace
- 23 Dioxin/Furan Stack Gas
- TO-13 PAHs Ambient
- TO-14-15 Air
- TO-15 VOCs Ambient
- TO-15 Ambient (VOCs) Low Level
- TO-3 VOCs Modified
- TO-3 VOCs Source
- TO-3C Fixed Gases Source
- TO-4 PCBs Ambient
- MA APH
- TO-9 Dioxin/Furan Ambient
Air Testing - Method Hold Times
Holding time in air samples is dependent upon the sampling media used to collect the samples, and the relative stability of that media. An inappropriate choice of media can seriously impact data quality. Please contact the lab for assistance in air testing and media selection.
| Media | Method | Holding Times Extraction | Analysis |
|---|---|---|---|
| Summa® Canister | 3C, 3CM, 25C | NA | 14 days |
| TO-3, TO-14, TO-15 | NA | 14 days | |
| Tedlar Bags* | 3C, 3CM, 25C,18 | NA | 48 hours |
| TO-3, TO-14 | NA | 48 hours | |
| PUF Cartridges | TO-4, TO-13 | 7 days | 40 days |
| TO-9 | 30 days | 45 days | |
| XAD2 Resin Traps | 23, 23A | 30 days | 45 days |
| Solutions | 5, 12, 26, 202 | NA | 6 Months |
| Filters | PM10, IO-3.4 | 6 months | 6 months |
| 5, 12, 29, 101, 201A | 6 Months | 6 Months | |
| 20 mL Vials | 3810M | NA | 6 months |
*Tedlar Bags have a short hold time due to sample instability. Mercury extraction holding time for Methods 29 and 101 is 28 days.