Mark G. Vigneri¹, William R. Mahaffey², William W. Slack³, Richard Werner⁴

(1) Environmental Business Solutions, Inc, Chatham, NJ
(2) Pelorus EnBiotech Corporation, Evergreen, CO
(3) FRx, Inc, Cincinnati, OH
(4) Environmental Consulting, Inc, Morristown, NJ

ABSTRACT: Use of the On-Contact Remediation Process for the Remediation of MTBE/BTEX, Chlorinated Compounds and other Organic Compounds, Especially in Low Permeability Geology

In situ chemical oxidation technologies employ the use of strong oxidants that are introduced into the subsurface typically through standard vertical well technology. The use of in situ chemical oxidation technology is a promising and rapidly emerging in situ remediation method. The On-Contact Remediation Process consists of a family of technologies for soil and groundwater. The most common On-Contact configuration is a multi-stage in-situ process utilizing subsurface propagations to transmit remediation chemistry to contaminated areas with real-time monitoring. A single injection point is capable of achieving the effect of 9 to 36 wells, and can be installed under buildings and in the presence of active USTs. Multi-stage chemistries for remediation are matched to contaminants, geology, and site conditions.

The On-Contact Remediation Process(r) (OCRP) follows a model of four stages:

Physical Stage - Most EBSI soil or groundwater sites are treated using Propagations. Propagations are replacements for inefficient wells. Propagations are installed using a hydraulic fracturing like technology to create a thin (2 to 4 cm) disk like structure of up to 11,000 sq. ft. in influence to ascend or descend chemistry for in-situ chemical remediation. A single injection point can reach up to 120 foot across and approximately 7 to 22 feet vertically in the subsurface independent of geological limitations. Final structure of a Propagation is mapped using transits, sonics and down hole probes.

The On-Contact(r) family also includes a tension application system for groundwater remediation in fractured rock, pump and treat augmentation, a percolation bin system for shallow soils, sediment access system and a new experimental wide-area in-situ system to be commercially available in 2001.

Preparation Stage - In all On-Contact(r) designs, contaminated areas are prepared in the subsurface for a higher efficiency of contaminant conversion to base states or harmless compounds.

AAPG Search and Discovery Article #90906©2001 AAPG Annual Convention, Denver, Colorado