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CaliforniaR#ional Water Quality Rintrol Board " <br /> g <br /> Central Valley Region ° ; <br /> a <br /> Robert Schneider,Chair <br /> Terry Tamminen Arnold Schwarzenegger <br /> Secretary for Sacramento Main Office Governor <br /> Environmental intemet Address: http://www.swrcb.ca.gov/rwgeb5 �������C <br /> Protection 11020 Sun Center Drive#200 Rancho Cordova,CA 95670-6114 <br /> Phone(916)464-3291 <br /> JUL 1 .9 2005 <br /> July 08, 2005 ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> Mr. Mark Adams <br /> Lincoln Center Environmental Remediation Trust <br /> Point Environmental <br /> 137 Park Place <br /> Richmond, CA 94801 <br /> AIR SPARGING PILOT STUDY WORK PLAN; LINCOLN CENTER;SAN JOAQUIN COUNTY <br /> Regional Water Quality Control Board (Regional Board) staff has reviewed the Lincoln Center <br /> Environmental Remediation Trust's (LCERT) submittal entitled "Work Plan To Conduct an Air <br /> Sparging Pilot Test" prepared by LFR Levine-Fricke and dated June 15, 2005. <br /> Air sparging is a remedial method whereby air is pumped into the groundwater. Volatile contaminants <br /> in the groundwater are transferred into that air and carried into the vadose zone where the air is captured <br /> by the soil vapor extraction system. To investigate the feasibility of using air sparging at the site, <br /> LCERT proposes to install two 2-inch diameter wells for the purpose of air injection and monitoring. A <br /> mobile/temporary air sparge system will be brought to site and air will be injected for approximately 8 <br /> hours. A helium tracer test will also be performed. Vapor concentrations will be measured before, <br /> during and after the testing. Groundwater concentrations will be measured in several wells before and <br /> after the testing. Regional Board staff concurs with the plan and we look forward to reviewing the <br /> testing results. <br /> If you have any questions, please contact me at (916) 255-3412, or by email at <br /> austind@rb5s.swrcb.ca.gov. <br /> J! " 0, <br /> DUNCAN AUSTIN, P.E. <br /> Senior Water Resources Control Engineer <br /> cc: Mr. Donald Bradshaw,LFR Levine Fricke, Emeryville <br /> Mr. Michael Infurna, San Joaquin County Environmental Health Department, Stockton <br /> Ms. Anne Farr, Ph.D., Farr Associates, Granite Bay <br /> David Sadoff, AIG Environmental <br /> Phil Johnson, Sims Grupe Management <br /> California Environmental Protection Agency <br /> Qa Recycled Paper I <br />