Armstrong, K. and B.L. Forslund.
IPEC 2017: 24th Annual International Petroleum Environmental Conference, 73 slides, 2017

At an inactive manufacturing facility in Belmont County, Ohio, chlorinated VOCs (TCE and daughter products DCE and VC) were documented in groundwater, saturated and unsaturated soils, and fractured bedrock. The chlorinated VOC baseline total ranged >50,000 µg/L to >1,000,000 µg/L. Existing pump and treat operating since the mid-2000s utilized 3 extraction wells for hydraulic containment in fill/alluvial soils overlying sandstone/shale bedrock. A pilot evaluation of the biostimulant ERDenhanced™ was performed March 2013-May 2014. The pilot used additive-filled passive-release-sock deployment units replaced at 8-10 week intervals to amend the 3-ft area of influence. Groundwater monitoring data showed that each amended location at T=17 months realized >98% reductions, which led to expansion of the treatment area to 35 ft x 35 ft (10 ft vertical component) and additional injections of biostimulant slurry. Analytical testing was performed quarterly through October 2016. This treatability evaluation demonstrated that the pilot results were transferable to full-scale application and that the biostimulation product provided a sustainable and cost-effective remediation strategy for dissolved-phase/residual mass chlorinated VOCs.
Slides: https://cese.utulsa.edu/wp-content/uploads/2017/11/IPEC-2017-Cost-Effective-In-Situ-Remediation-Biostimulation-as-a-Residual-Source-Mass-Remediation-Strategy.pdf
Longer abstract: https://cese.utulsa.edu/low-impact-pilot-study-leads-expanded-treatability-evaluation-confirming-biostimulation-safe-sustainable-cost-effective-cvoc-remediation-strategy/