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Gila River Boundary Site

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Pilot studies were conducted at a former landing strip site to test toxaphene remediation treatment technologies. Testing demonstrated up to 70% removal of toxaphene in soil over 41 days. The U.S. EPA provided effective treatment recipes involving amendments like fertilizer added at 2% of soil weight. A full-scale treatment plan was proposed, involving excavating contaminated soil, adding amendments, and monitoring for 3 to 8 months until treatment is complete.

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Gila River Boundary Site Harry Allen, USEPA OSC Mike Daniel, Pat Mariella, GRIC Dept. Env. Quality
Site Location
Former Landing Strip
Site Assessment Conducted in October 2002 Toxaphene levels in soil exceeded levels considered safe. Concentrations as great at 660 parts per million toxaphene detected.
油
油
Pilot Studies Pilot Studies were conducted to see if the treatment technology would work at the Site. Small treatment pits were built to attempt treatment. May 03 too dry October 03 demonstrated toxaphene destruction or removal
油
油
Pilot Study Results Results Demonstrated 70% removal in 41 days. Recommendations Recipes U.S. EPAs Environmental Response Team provided recipes for effective treatment of toxaphene Amendment fertilizer will be added at a rate of 2% per total weight of the soil being treated.
Toxaphene Bioremediation Pilot Study 11/12/03 10/02/03 Date 70.95% 260 895 Recipe 5 65.36% 310 895 Recipe 4 73.18% 240 895 Recipe 3 -34.08% 1200 895 Recipe 2 36.31% 570 895 Recipe 1 Removals T 41 Avg. T 0
Construction Excavate and place contaminated soil in lined pits or burritos Add amendments i.e. , fertilizer, and mix Water and seal the burritos Estimated Costs Estimated $700,000 in construction costs As much as $500,000 in other costs
Next Steps How long will the project take? Construction will not exceed 6 weeks using heavy equipment. EPA and GRIC DEQ will monitor the Site until treatment is completed. Total treatment time will be between 3 and 8 months.
Completion EPA will collect samples to document effectiveness of treatment. Once treatment is completed EPA will: Cut open the liners and allow water to drain Regrade the Site if ground surface is uneven Remove all equipment from the Site
Questions? visit the Site trailer on 51 st Avenue at Komatke Lane (until last week of May) Call 1-800-231-3075 to leave a message - well call you back, or.

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Gila River Boundary Site

  • 1. Gila River Boundary Site Harry Allen, USEPA OSC Mike Daniel, Pat Mariella, GRIC Dept. Env. Quality
  • 4. Site Assessment Conducted in October 2002 Toxaphene levels in soil exceeded levels considered safe. Concentrations as great at 660 parts per million toxaphene detected.
  • 5. 油
  • 6. 油
  • 7. Pilot Studies Pilot Studies were conducted to see if the treatment technology would work at the Site. Small treatment pits were built to attempt treatment. May 03 too dry October 03 demonstrated toxaphene destruction or removal
  • 8. 油
  • 9. 油
  • 10. Pilot Study Results Results Demonstrated 70% removal in 41 days. Recommendations Recipes U.S. EPAs Environmental Response Team provided recipes for effective treatment of toxaphene Amendment fertilizer will be added at a rate of 2% per total weight of the soil being treated.
  • 11. Toxaphene Bioremediation Pilot Study 11/12/03 10/02/03 Date 70.95% 260 895 Recipe 5 65.36% 310 895 Recipe 4 73.18% 240 895 Recipe 3 -34.08% 1200 895 Recipe 2 36.31% 570 895 Recipe 1 Removals T 41 Avg. T 0
  • 12. Construction Excavate and place contaminated soil in lined pits or burritos Add amendments i.e. , fertilizer, and mix Water and seal the burritos Estimated Costs Estimated $700,000 in construction costs As much as $500,000 in other costs
  • 13. Next Steps How long will the project take? Construction will not exceed 6 weeks using heavy equipment. EPA and GRIC DEQ will monitor the Site until treatment is completed. Total treatment time will be between 3 and 8 months.
  • 14. Completion EPA will collect samples to document effectiveness of treatment. Once treatment is completed EPA will: Cut open the liners and allow water to drain Regrade the Site if ground surface is uneven Remove all equipment from the Site
  • 15. Questions? visit the Site trailer on 51 st Avenue at Komatke Lane (until last week of May) Call 1-800-231-3075 to leave a message - well call you back, or.