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I i <br /> Shell sites summary <br /> Page 3 <br /> interim system. It was discussed that the contamination is not defined since there is benzene in the <br /> lateral shallow wells. <br /> 3725 Tracy Blvd,Tracy <br /> An SCM that includes a"Request for No Further Action"will be prepared for this site. <br /> 880 Victor Road,Lodi <br /> The temporary groundwater extraction system will continue to be operated. EHD will review the <br /> "Subsurface Investigation Report,Fourth Quarter 2005Groundwaier Monitoring Report,and Site <br /> Conceptual Model'dated February 23,2006 and provide written comments. <br /> 4315 Waterloo Road,Stockton <br /> Six soil borings and three monitoring wells were installed in December 2005. Groundwater samples <br /> from MW5 and MW6 had concentrations of 1,2 DCA in them. 1,2 DCA was not found in <br /> groundwater samples from MW1 through MW4 previously. Shell will have all the groundwater <br /> samples analyzed for 1,2 DCA. MTBE and TBA concentrations increased in the groundwater <br /> samples from MW1. Active remediation to reduce the oxygenate concentrations may be necessary. <br /> A discussion and recommendation to reduce the contaminant concentrations should be included in <br /> the next quarterly report.' <br /> 1160 Yosemite Avenue,Manteca <br /> An SCM has been submitted. EHD will discuss closure of the site with the CVRWQCB. <br /> If you have any questions or comments please contact the appropriate LOP staff overseeing the site <br /> or call me at(209) 468-3449. <br /> Donna Heran,REHS,Director <br /> Environmental Health Department <br /> Margaret Lagorio,Supervising REHS <br /> Site Mitigation Unit <br /> c: CVRWQCB—James L.L.Barton,RG <br /> 3 Cambria—Joe Neely,Aubrey.Cool <br />