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March 30,2015 <br /> Messrs. Larson and Trommer Page 2 of 2 <br /> CUF Claim No. 18916 <br /> addressed by advancing a confirmation soil boring in the area of maximum concern to assess <br /> the current TPH concentrations. <br /> During the most recent groundwater monitoring event (January 2015) the benzene <br /> concentrations in the most intensely impacted monitoring well, MW-5, dropped below 1500 <br /> micrograms per liter (ug/1) for the first time to 690 ug/I; if this is confirmed by the next monitoring <br /> event, the EHD will issue a directive to cease active remediation and perform two rebound <br /> testing confirmation groundwater sampling events and move the site to closure if the site meets <br /> the LTCP criteria. <br /> Questions or comments should be directed to Nuel Henderson at nhenderson(a)sicehd.com or <br /> at (209) 468-3436. <br /> Sincerely, / <br /> Nuel Henderson, PG <br /> Engineering Geologist <br /> 2015 Second Review Summary Report CUF Claim No. 18916.doc <br />