It’s not their fault. Their equipment isn’t good enough to detect the toxins so I guess we’ll just have to breathe them in. They use a screening tool and it’s not sensitive enough. On top of that, their must test benchmark is too high.
Last week, TCEQ answered two odor complaints at the same Fort Worth location and both times they got a “non-detect.” All the while summa canisters were sitting on this property collecting air samples. Those canisters showed contamination that the TCEQ missed because their screening instruments are not sensitive enough.
This is why industry can claim that our air is A-OK when they know it’s not.
The difference in results all gets back to the TCEQ using a screening instrument that is not sensitive enough to detect the chemicals in the air. The instrument they use is a screening device from which they then decide whether to collect a canister or not. That is why they made the decision not to collect canister samples. Had they collected a canister, the results would have been the same and indicated the presence of the chemicals that were found in the canister sample.
While the TCEQ found nothing and smelled nothing, the summa canister had a different result:
The air sample contained Carbon Disulfide in excess of TCEQ Short-Term Effects Screening Level and TCEQ Long-Term Effects Screening Level.
The air sample also contained eight Volatile Organic Chemicals and Diesel Range Petroleum Hydrocarbons. The volatile organic chemicals present in the air sample consisted of Benzene (known human cancer causing agent), Ethyl Benzene, Toluene, m & P Xylene, Methyl Chloride, Dichlorodifluoromethane and 1,3,5-Trimethylbenzene and 1,2,4-Trimethylenzene. These chemicals were present below the TCEQ Short and Long Term Effects Screening Levels but were present in the air sample. The cumulative effects of exposure to these eight Volatile Organic Chemicals, the Carbon Disulfide and the Diesel Range Petroleum Hydrocarbons are of concern. The source or sources of these air pollutants must be controlled and the concentrations in the air reduced.
The benzene levels were just barely below the Long Term Effects Screening Level. Just barely.