Laserfiche WebLink
A S S O C I A T E S I N C <br /> required to achieve similar air flows may be lower The AS system will be operated using individual <br /> wells in sequence with on-line vapor extraction wells to control migrate of the groundwater plume <br /> ' Similar to the VES, the actual radius of influence for each sparge well will vary and the effective radius <br /> of influence should be evaluated following long-term operation of the AS system <br /> 5.2.2 Air Sparging Process <br /> ' In-situ air sparging is the process of injecting air into the saturated zone via sparge wells Sparge <br /> wells are designed with a screen interval at a depth approximately 15 to 20 feet below the water <br /> ' table Pressurized air is forced out through the screen and into the saturated zone The air forms <br /> bubbles that rise to the unsaturated zone, carrying trapped and dissolved contaminants Vapor <br />' extraction wells in the unsaturated zone capture sparged air which is then treated through the <br /> vapor extraction system The proposed AS system will include a blower/air compressor, associated <br /> piping, control valves, pressure gauges, flow meters, instrumentation and controls, and a remediation <br /> compound shared with the VES <br />' 6.0 PROPOSED SCOPE OF WORK <br /> Based on the results of previous subsurface investigations, ATC proposes the following project tasks <br />' for remediation of soil and groundwater The tasks are described in detail in the following sections <br />' Task I Final Design Plans and Specifications <br /> Task 2 Building Air Pollution Control Distnct, and Well Installation Permits <br /> Task 3 Bid Package and Bid Evaluation <br />' Task 4 Construction and Construction Inspection <br /> Task 5 Systems Startup and Operation <br /> Task 6 Systems Performance Evaluation <br /> 6_1 Final Design Plans and Specifications <br /> This phase of the proposed work will include engineering calculations, preparation of a list of <br /> equipment, selection of materials and instrumentation,preparation of Plans and Specifications including <br />' site and remediation compound layout, remediation compound equipment details, trench and section <br />' w 162574 01\CAP import doe 10 <br />