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Z 0 • <br /> Frontier Transportation,Incorporated Page 2 <br /> 425 Larch Road May 21, 2008 <br /> Tracy, California 95376 <br /> The most current report submitted to GeoTracker, 2007 4 Quarter Groundwater Monitoring <br /> Report, dated February 21, 2008, prepared and submitted by Biophysics Environmental <br /> Assessments, Inc. (BEA), recommends that impacted groundwater in the source area be "pumped <br /> and treated." Once the EHD has received the report for the groundwater extraction pilot test, the <br /> EHD will respond to BEA's recommendation to implement "pump and treat" to contain the <br /> MTBE plume. <br /> Please provide rose diagrams in future quarterly reports that demonstrate trends in groundwater <br /> flow direction over time. If you have any questions, please contact Vicki McCartney, Senior <br /> Registered Environmental Health Department, at (209) 468-9852 or by email at <br /> vmccartney@sjcehd.com. <br /> Sincerely, <br /> Victoria L. McCartney, REHS Nuel C.Henderson,Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: Mr. James V. Jazmin, PE, Biophysics Environmental Assessments, Inc., 3577 W. <br /> Philadelphia Avenue, Chino, California 91710 <br /> Mr. James L.L. Barton, PG, California Regional Water Quality Control Board Central Valley <br /> Region, 11020 Sun Center Drive, Suite 200,Rancho Cordova, California 95670 <br />