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An alternative to groundwater extraction at saes where vapor extraction is being implemented <br /> is air sparging In this technology, air is injected into the upper portion of the upper water <br /> bearing zone through precisely screened air injection wells to promote aeration of dissolved <br /> contaminants within the zone of influence of the vapor extraction wells Air sparging, when <br /> used in conjunction with vapor extraction has been shown to be effective in reducing dissolved <br /> contaminants in the groundwater The estimated cost to install up to five air sparge wells, <br /> with the incidental hardware, is $20,000 to $35,000 Operational costs would be minimal, <br /> limited to minor repairs and energy costs <br /> I thank you for your patience and cooperation. Please call me at (209) 838-3507 if you have <br /> any questions or require additional information <br /> Very Truly Yours, <br /> Canonie/Smith Environmental Technologies Corporation <br /> n P Lane <br /> Project GeologistAVL <br /> ' <br /> Jeanne Romsey L E'"�° �-� `�� <br /> CA Registered Civil Engineer No C47410 <br /> JPL ,� <br /> ..... ,.:moi <br /> Attachments <br /> cc: Mr Jim Escobar <br /> Ms Elizabeth Thayer <br /> 39009-IO/FRP-ADD doe <br />