Document Overview
This case history describes PES-31 treatment of vehicle drain oil impacted black clay at a BFI treatment facility in Itasca, Texas.
Initial TPH Compared With Final Sample Results
Reported Remediation Results
| Metric | Before / Initial | After / Final | Reported Change | Notes |
|---|---|---|---|---|
| TPH — average to sample range | 2,534.2 ppm | 78–208 ppm | Approximately 91.8% to 96.9% reduction | EPA Method 418.1/418.2; follow-up samples A, B, and C |
| TPH sample A | 2,534.2 ppm | 78 ppm | Approximately 96.9% reduction | Assessment test 04/30/92 |
| TPH sample B | 2,534.2 ppm | 208 ppm | Approximately 91.8% reduction | Assessment test 04/30/92 |
| TPH sample C | 2,534.2 ppm | 139 ppm | Approximately 94.5% reduction | Assessment test 04/30/92 |
| BTEX | <1 ppm | Not tested | Initial value only | Reported in initial values |
Project and Application Details
PES Application Summary
PES-31 was applied as a one-time inoculation at a ratio of one gallon PES-31 to 2.0 cubic yards of vehicle drain oil contaminated soil. Nutrient supplement was applied with water from the treatment facility water truck. The treatment lift was tilled twice weekly, moisture was maintained by inspection and watering, and supplemental nutrients were added every 15 days when necessary.
Reported Outcome
The reported follow-up TPH values ranged from 78 ppm to 208 ppm, compared with an initial average TPH value of 2,534.2 ppm.
Key Takeaways
This case history is a strong data-driven PES-31 landfarming example for vehicle drain oil impacted soil, with a short documented treatment period and multiple follow-up sample results.
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