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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:
Initial Dissolved Oxygen (DO) levels increased followed by a moderate reduction after
35 days. (suggests oxygen utilization or enhanced biodegradation)
Maximum "bubble radius" was 30 feet
SVE "capture rate" to sparge "injection rate" = 10:1
Air sparging with SVE effectively removes DNAPLs
2.
Why was the Technology Successful?
The combined air sparging & vapor extraction system removed over 100 lb VOCs in
the first 30 days
75% VOC reduction in first 4 months
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 $190,000
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