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w <br /> ARCO Sites <br /> Page 3 <br /> 3425 Tracy Blvd . , Tracy ARCO Facility # 2093 <br /> PBS /EBD contact - Harlin Knoll <br /> The vapor extraction system is operating and air sparging will <br /> start soon . The concentrations of contaminants in the ground <br /> water samples from monitoring well MW8 are declining . If <br /> concentrations in the water samples from this well continue to <br /> decline than an additional well to define the plume of <br /> contamination will not be necessary . <br /> Summary <br /> The meeting allowed for continued communication between all parties <br /> and for continued progress at the sites . <br /> If you disagree with this summary or have any questions contact me <br /> at ( 209 ) 468 - 3449 . <br /> Donna Heran , REHS , Director <br /> Environmental Health Division <br /> Margar�ori� , Supervisor <br /> Site Mitigation Unit <br /> C : CVRWQCB - Beth Thayer <br /> c : EMCON - Jay Johnson <br /> c : Brown & Caldwell - Joel Coffman <br /> c : LOP files <br />