By switching from active extraction to in situ CL-Out® bioremediation, In Control Technologies, Inc. of Houston, Texas saved their client $100,000s in on-going operation and maintenance costs. The Site was a shopping center where soil and ground water were contaminated by dry cleaning chemicals. A dual phase extraction system was installed and operated for 9 years. The dual phase system reduced the total CVOCs by 70%, but the contaminant removal rate reached the limit of cost effectiveness.
By switching to bioremediation, the client avoided $75,000 on-going annual operation and maintenance cost with a $20,000 investment in bioremediation. CL-Out® bioremediation reduced the residual contamination by more than 98% in less than 90 days. This case study was reported at the 9th In Situ and On-Site Bioremediation Symposium, 2007
Irwin Engineers, Inc., of Natick, Massachusetts has undertaken a similar approach to reduce on-going pump and treat remediation costs at a site of perchlorate contamination. Irwin Engineering presented that case study at the AEHS Soils, Sediment, Water and Energy Conference (2013).