Laserfiche WebLink
WORK PLAN <br /> VAPOR EXTRACTION OF GASOLINE <br /> 7-ELEVEN STORE # 20680 <br /> 9110 THORNTON ROAD <br /> STOCKTON, CA <br /> VET PROJECT # 1.024.7.1 <br /> 1.INTRODUCTION <br /> The soils at the site are contaminated with gasoline, a volatile organic <br /> compound (VOC) which can be rapidly remediated using vapor extraction. <br /> The aerial and vertical extent of the groundwater contamination has been <br /> defined by Groundwater Technology, Inc. Currently four vapor extraction <br /> wells exist at the site and are used as a means of mitigating vapor <br /> contamination under the 7-ELEVEN store. However, this system does not <br /> properly address the soil and groundwater contamination by gasoline and <br /> will be upgraded to increase the radius of influence of the vapor extraction <br /> system, enhance the flow of gasoline into the wells, and decrease the <br /> frequency of activated carbon changeout. <br /> SCOPE OF WORK <br /> VET will install an upgraded high flow soil vapor extraction system for the <br /> purpose of remediating the gasoline contaminated soils and groundwater. The <br /> system will be manifolded to five existing groundwater monitoring wells <br /> MW-1, MW-3, and MW-4 which have gone dry and will be used as vapor extraction <br /> wells. MW-9 and PW-1 may also be manifolded to existing piping and further <br /> increase the radius of influence of the vapor extraction system. Vapor wells <br /> V-1, V-2, V-3, and V-4 will continue to be used as vapor extraction wells. <br /> Production Well PW-3 will be specially manifolded and used as a vapor <br /> extraction well. <br /> VET will trench the vapor extraction wells into the existing underground <br /> piping system (very limited trenching will be required) and manifold them <br /> into an upgraded vapor extraction system. VET will excavate the existing <br /> well covers and trench vapor conduit to the southeast corner of the property. <br /> The vapor conduit will be manifolded to four (4) 160 SCFM regenerative <br /> blowers. The extracted well vapors (under positive pressure) will then be <br /> transported through a common larger diameter vapor conduit to the treatment <br /> system. The most cost effective and rapid treatment of the extracted well <br /> VAPOR EXTRACTION TECHNOLOGY <br />