Document Overview
This case history describes a production pit cleanup in Cameron County, Louisiana using PES-31 and PES-41. The project involved crude oil impacted soil and water in a marshy setting with large trees and grasses.
Reported Before and After Result
Reported Remediation Results
| Metric | Before / Initial | After / Final | Reported Change | Notes |
|---|---|---|---|---|
| Soil TPH | 230,000 ppm | 6,600 ppm | Approximately 97.1% reduction | EPA Method 418.1; initial sample 03/07/91 and follow-up sample 05/10/91 |
| Pit water TPH | Not stated | 45 ppm | Final reported value only | Water sample date 03/22/91 |
| Target contaminant concentration | Crude oil impacted material | <1% target | Target stated in source document | Target concentration shown in site description |
Project and Application Details
PES Application Summary
PES-31 was applied around the perimeter of the pit at equally spaced intervals at a ratio of one gallon of PES-31 to 2.0 cubic yards of oil contaminated soil. PES Nutrient Supplement was solubilized in water and sprayed evenly over the pit. The pit was mechanically mixed, the high points were leveled, the treatment was repeated after 14 days, and the pit was mixed and sprayed every 30 days while monitoring continued.
Reported Outcome
The reported soil TPH concentration decreased from 230,000 ppm to 6,600 ppm during the documented treatment period. A water sample reported 45 ppm TPH on 03/22/91.
Key Takeaways
This case history shows PES-31 use in a large production pit cleanup with mechanical mixing, nutrient addition, repeated application, and routine TPH monitoring. The source document reports a major reduction in soil TPH during the project.
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