Laserfiche WebLink
I6V4kLTC <br /> A S S O C I A T E S I N C <br /> ' additional shallow <br /> ' vapor wells are proposed to effectively remediate impacted soiloff- <br /> gas <br /> and to rapture o <br /> ff <br /> gas <br /> from air sparging <br /> The VES will be operated under similar conditions as the VET to achieve a similar estimated radius of <br /> influence for each well The VES will be operated using individual wells or sets of vapor wells in <br /> sequence, rather than operating all wells concurrently This approach should minimize the sire and <br /> inherent operating costs for the off-gas abatement unit, while still allowing maximization of airflow <br /> from individual wells <br /> The actual radius of influence for each vapor extraction well will vary depending on subsurface <br /> geologic conditions, the extent and distribution of hydrocarbon-nnpacted soil, the effect of <br /> concurrently operating the AS system, and site-specific operating conditions of the VES The effective <br /> radius of influence should be evaluated following long-term operation of the VES <br /> 5.1.2 Vapor Extraction System Treatment Processes <br />' Subsurface piping will direct extracted vapor from the wells to a nearby remediation compound <br /> Components of the VES located in the remediation compound will include the following a vapor <br />! extraction blower that will extract vapor from the wells through the subgrade piping, a flow indicator <br /> that measures extracted airflow, a condensate separator to remove entrained droplets of moisture, a <br /> catalytic oxidizer, thermal oxidizer, I C engine, or vapor-phase carbon, associated piping, control <br /> valves, pressure gauges, flow meters, instrumentation and controls, a remote monitoring system to <br /> transmit the status of process variables and any alarm or upset conditions, and a fenced remediation <br />' compound or contained remediation system to preclude public access <br /> 5.2 Groundwater Remediation S stem <br /> 5.2.1 Groundwater Air Sparging <br /> The proposed groundwater AS system will utilize three proposed air sparge wells and a blower/air <br /> compressor to address the hydrocarbon impacted groundwater The AS system will be operated under <br /> similar conditions as the pilot test although with the use of properly designed sparge wells, the pressure <br />' W 162574 OMCAP report doc 9 <br />