Table 9.
Example TPH concentration in soil vapor, average TPH:Benzene ratio and TPH carbon range makeup of soil vapor samples collected in the Hawaii DOH petroleum vapor study (based on summa canister, TO-15 data).
| Site/Fuel Type | ExampleTPH(μg/m3) | AverageTPH:Benzene Ratio | Average Carbon Range Composition | ||
|---|---|---|---|---|---|
| Aliphatics | Aromatics | ||||
| C5-8 | C9-10 | C9-12 | |||
| Site A (JP-4/AVGAS) | 300,000,000 μg/m3 | 1,513:1 | 96% | 0.2% | 3.3% |
| Site B (mixed fuels) | 220,000,000 μg/m3 | 4,174:1 | 93% | 0.3% | 6.8% |
| Site C (JP-8 +/− JP-4) | 86,000,000 μg/m3 | 18,710:1 | 72% | 0.6% | 27% |
| Site D (JP-4/AVGAS) | 2,600,000 μg/m3 | 9,135:1 | 63% | 4.1% | 33% |
| Site E (diesel) | 13,000,000 μg/m3 | 54,236:1 | 25% | 0.9% | 74% |