Document Overview
This case history describes a PES-31 bioremediation cell used to treat diesel and lube oil impacted soil, ballast, and rock after a railroad derailment in West Texas.
Reported TPH Reduction Over Time
Reported Remediation Results
| Metric | Before / Initial | After / Final | Reported Change | Notes |
|---|---|---|---|---|
| Average TPH | 13,560 ppm | 57 ppm | Approximately 99.6% reduction | EPA Method 418.1; Day 0 to Day 70 |
| Day 15 TPH | 13,560 ppm | 6,400 ppm | Approximately 52.8% reduction | Interim monitoring result |
| Day 30 TPH | 13,560 ppm | 1,378 ppm | Approximately 89.8% reduction | Interim monitoring result |
| Day 45 TPH | 13,560 ppm | 338 ppm | Approximately 97.5% reduction | Interim monitoring result |
| BTEX | BDL | Not separately reported | Below detection limit at initial sampling | BDL 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 contaminated media. Nutrient supplement was solubilized in water and applied to the contaminated media. A bermed biotreatment cell was constructed, nutrients were applied twice monthly, and 500 gallons of water were applied weekly for moisture maintenance.
Reported Outcome
The documented average TPH concentration decreased from 13,560 ppm to 57 ppm during the 70-day monitoring period.
Key Takeaways
This case history provides a clear data set showing stepwise TPH reduction over time. It is a strong PES-31 example for diesel spill bioremediation and managed treatment-cell applications.
Related PES Information
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