Vacuum enhanced recirculation and in-well airstripping system removes up to 99% of volatile organic compound during re-circulation. Increases in-situ bioremediation.

1. VacCircTM Vacuum Enhanced Re-circulation System PRESENTATION Available From: Bays Environmental Remediation Management 27702 Crown Valley Parkway, #D4-333, Ladera Ranch, CA 92694 Ph: 888-511-5335, ext: 102, Fax: 888-542-0229, e-mail: mp@baysgrp.com www.baysgrp.com – www.vaccirc.com

3. VacCirc performs two-phase extraction without removing water.

4. The VacCirc method strips up to 99 % volatile organic compounds such as petroleum hydrocarbons and chlorinated solvents from groundwater during recirculation. Groundwater is re-circulated within the treatment zone.

5. VacCirc is effective treating chlorinated and aromatic hydrocarbons. VacCirc also increases in-situ aerobic bioremediation. It can be enhanced by addition of oxygen or ozone to the release wells.

8. Vacuum blower

9. Vapor treatment unit

10. Conveyance piping

11. Gauges and meters

13. VacCircTMSingle Borehole Blower Vapor Treatment Recirculation Well Pairs

14. VacCircTMSlant Well Pair Blower Vapor Treatment Release Well Collection Well

15. VacCircTM Dual-Well Schematic Blower Vapor Treatment O2 Oxygen Tank for iSOCunit Water Flow OPTIONAL iSOCunit Release Well Collection Well

16. 8 VacCircTM System Layout Blower Vapor Treatment GW FLOW DIRECTION Treatment barrier Source Treatment

17. VacCircTMSystem Benefits The VacCirc System removes (strips) 80-90 % of the volatiles from groundwater during each recirculation cycle. Using re-circulation vs. conventional two-phase extraction and removal eliminates a need for treatment and disposal of the extracted water and enhances naturally occurring biodegradation. Groundwater is re-circulated multiple times in the contaminated zone during the process. Each re-circulation cycle will remove up to 90 % of VOCs from groundwater. Cleaner groundwater as being re-circulated in subsurface will also remove adsorbed contaminant from the soil matrix. The system may be enhanced by adding an iSOC unit or an ozone generator to increase biodegradation in the subsurface. VacCirc will remove even hard to strip compounds such as 1,4-dioxane after multiple recirculation and stripping cycles. Given that each cycle strips 10% to 20% of 1,4-dioxane, after 10 to 20 recirculation cycles, 60% to 98% of the 1,4-dioxane will be removed.

18. VacCircTM System Cost The cost estimate varies based on site specific parameters, depth to groundwater, type of contaminant and vapor treatment alternative. Bays Environmental Remediation Management (BERM) will assist with well design and installation, wellhead assembly design and installation for a unit cost of per recirculation cell. BERM will also provide startup assistance for each installation. Please call 888-511-5335 ext: 102 or send an e-mail to info@vaccirc.com get a site specific evaluation and cost estimate.

19. 11 IN-WELL STRIPPING

20. VacCircTM Vacuum Enhanced Re-circulation System THANK YOU Available From: Bays Environmental Remediation Management 27702 Crown Valley Parkway, #D4-333, Ladera Ranch, CA 92694 Ph: 888-511-5335, ext: 102, Fax: 888-542-0229, e-mail: info@vaccirc.com www.baysgrp.com – www.vaccirc.com