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Mr. Philip Goalwin - 2 - 23 February 2009 <br /> The data show that PCE concentrations increased from 3 I Quarter 2008 to 4th Quarter 2008. <br /> Although concentrations of PCE measured in the 12/18/08 sampling event were below the <br /> 25% reduction mark, more data is still needed to assure that PCE levels have stabilized below <br /> the 25% reduction concentration. If total PCE concentration remains below 885.8 µg/L in 1St <br /> Quarter 2009, Regional Board staff will reconsider whether to concur that the 25% reduction <br /> milestone has been achieved. <br /> Please contact me with all questions and concerns at 916.464.4682 or <br /> rcervantes@waterboards.ca.gov <br /> Roberto Cervantes <br /> Water Resources Control Engineer <br /> Site Cleanup Unit <br /> cc: Mr. Dennis Zaragoza, Esq., San Francisco <br /> Mr. Greg Brandin, E2C Remediation, Roseville <br /> Mr. Wally Sandelin, Public Works Director, City of Lodi, Lodi <br /> Mr. Harlan Knoll, San Joaquin County Environmental Health, Stockton <br />