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Compliance with the United States Environmental Protection Agency Effluent Limitation Guidelines – Turbidity Control and Surface Outlets.
| 题名： | Compliance with the United States Environmental Protection Agency Effluent Limitation Guidelines – Turbidity Control and Surface Outlets. |
| 作者： | Privette, C. V.; Sawyer, C. |
| 关键词： | Water quality, Best management practices, Passive polyacrylamide (PAM), Maintenance (upkeep), Waterways (Transportation), Flocculants, Turbidity, Effluent limits, Erosion, Sediment, Compliance, Turbidity Control, Recommendation, Granular polymer, Environmental Protection Agency (EPA) |
| 摘要： | A goal of this research was to maximize turbidity reduction using passive polyacrylamide (PAM) applications and investigate the longevity of PAM’s effectiveness. Results indicate PAM application may provide an effective alternative for turbidity reduction where SCDOT sites discharge to waterways with sediment-related water quality standards in place. Research findings show that granular polymer/flocculants applied directly to ditch checks can significantly reduce turbidity below a level of 280 NTU. To optimize turbidity reduction effectiveness where necessary, it is recommended that PAM be reapplied at least once every seven days to ensure continued flocculation over time. In addition, proper maintenance and regular inspections must be a priority for reducing TSS and turbidity. Infrequent or poor maintenance routinely corresponded to lower trapping efficiencies for individual practices. Another research goal was to evaluate SCDOT sediment basin design. Results showed 80% reduction in turbidity or greater than 82% reduction in TSS could be achieved with skimmers alone or through a combination of skimmer and baffle systems. With addition of a granular polymer, turbidity and TSS reduction exceeded 90%. A final element of investigation compared sediment basin performance using a single baffle with performance achieved using three baffles when PAM is used. Statistical analysis of results confirmed the 3-baffle configuration performed better than 1 baffle for reducing turbidity. For TSS reduction however, no statistical difference between the two configurations was found. Finally, a series of laboratory bioassays was conducted to evaluate acute and chronic toxicological effects resulting from exposure to commercially available PAM formulae. Toxicities reported here are well above dosage recommendations made by |
| 报告类型： | 科技报告 |
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