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Concurrent Technologies Corporation
Remediation Survey
Air Sparging with Soil Vapor Extraction
Page 8
C.
Lessons Learned
1.
Lessons Learned about the Operation of the Equipment:
Vacuum system only operated for first 14 days - off-gas concen = 710 ppm total VOC
(BTEX & TPH). Next, air sparging activated with vacuum system - VOC output
increased to over 2,600 ppm. (81 lb/day vs. 270 lb/day)
Low DO readings suggest moderate O2 utilization & increased biological activity
2.
Why was the Technology Successful?
(Not complete as of publication)
3.
Why was the Technology Unsuccessful?
VI.
CONTRACT TYPE AND COSTS
A.
Design of System
1.
Contract Type:
2.
Cost:
B.
Construction of System
1.
Contract Type:
2.
Cost:
C.
Operation of System
1.
Contract Type:
2.
Cost:
D.
Cost: Under $130,000





 


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