NJ007 – Pneumatic Fracturing, Groundwater Infiltration Enhancement
Former Manufacturing Facility, Central New Jersey
Pneumatic Fracturing (PF) was used to improve the effectiveness of a groundwater re-injection system in a siltstone formation at a former manufacturing facility in Central New Jersey. The client was required by permit to have groundwater re-injected down-gradient back into the formation following treatment to remove TCE. However, the transmissivity and storativity of the formation were too low to allow the necessary flow rate of water to enter the formation. Pneumatic Fracturing was applied to increase the quantity of groundwater which could be accepted by the formation. A full-scale remediation system is currently operating at the facility.
Prior to application of Pneumatic Fracturing, a re-injection well could only receive 2 gallons per minute. Following Pneumatic Fracturing, the injection well was accepting 11 gallons per minute. Several other re-injection wells were fractured as part of the full-scale injection well system.
This application was unique in that it required fracturing to be directly out of the bottom of the well whereby vertical fractures were created in a horizontally predominant geology.