Air Sparging by gox16621

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									                                        Active Remediation
                                                         Air Sparging


                                                                                            VENT TO
                                                                                            ATMOSPHERE     SOIL VAPOR MONITORING

                                                                                            CARBON
                                                                                            CANISTER     COMPRESSOR

                                            MONITORING                                                                 CONCRETE
                                            WELL                                                                      FOUNDATION
                                                     BLOWER




                                                    SOIL
                                                                                    DRAIN
                                                                                    VALVE



                                                        VAPOR
                                                    EXTRACTION                                                  VAPOR
                                                         WELL                                                   EXTRACTION
                                                                                                                WELL

                                                                                             AIR
                                                                      CONTAMINANT            SPARGE
                                                                         VAPOR                                               CONTAMINATED
                                                                                             WELL
                                                                                                                             GROUNDWATER




                                                                                            AIR




                                    Air Sparging (with Soil Vapor Extraction)

Air sparging is the process of injecting air through a                 Another benefit of air sparging technology is that the
contaminated aquifer to agitate and volatilize                         oxygen added to contaminated groundwater and
contaminants dissolved in the groundwater or trapped                   vadose zone soils can also enhance aerobic
in smear zone soils. The injected air flushes (bubbles)                biodegradation of contaminants below and above the
volatile contaminants into soils above the water table                 groundwater table (see page 19 for an explanation of
(the vadose zone), where a soil vapor extraction (SVE)                 bioremediation).
system is usually implemented to remove and recover
                                                                       Typical equipment, in addition to that used for SVE,
or treat the generated vapor phase contamination (see
                                                                       includes specially designed air sparge wells, blowers,
page 16 for an explanation of SVE and off-gas
                                                                       piping networks, valves, pressure gauges, air flow
treatment).
                                                                       meters, and manifolds.



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