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Shell sites in San Joaquin County <br /> Page 2 <br /> 2320 El_Dorado Street,Stockton ' <br /> HHD staff was not available to discuss this site. 1 <br /> 2494 Fremont Street,Stockton <br /> ARCO has been named as a responsible party for the site (2478 E. Oak Street) to the north of this <br /> site and will be investigating the extent of the contamination at that site. Shell should evaluate <br /> whether remediation is necessary and feasible on their site. <br /> 2375 Grant Line.Trac <br /> Groundwater extraction by a vacuum truck from MW1 and M`'V6 is being performed monthly to <br /> reduce the concentrations of MTBE in these wells. A presentation was made by Dan Lescure that it <br /> was not cost-effective to continue the vacuum truck groundwater extraction events and that <br /> monitored natural attenuation should he considered. EHD requires complete definition of the <br /> contaminant plume to consider this alternative. Although down-gradient off-site assessment is <br /> impeded by the location of Hwy 205, further investigation down gradient, across H—wy 205 is <br /> required. <br /> 341 Main Street,Ripon <br /> CRA will correct the table in the Care Clo.Fure Summary.Reoor't and upload the revised report to <br /> GeoTracker. Once EHD has received this report, EHD will proceed with providing the needed <br /> information to the Central Valley Regional Water Quality Control Board for case closure <br /> consideration. <br /> 7700 Moreland Street,Stockton <br /> A closure report was submitted for review. <br /> 6131 Pacific Avenue, Stockton <br /> Dual-Phase extraction will be initiated once the City of Stockton issues Shell a perrrait to dispose of <br /> extracted groundwater to the city sewer. <br /> 4 3725 Trac,Tracy <br /> A closure reportwas submitted-for review. <br /> 880 Victor Road,Lodi <br /> The temporary groundwater extracrioni system will continue to-be operated since'the contaminant <br /> plume is not defined to the south-southeast and the adjacent property owners to the south and east <br /> have not allowed monitoring wells to.be installed on their property. Extraction of groundwater from � <br /> MW7 in the southeast corner of the property should be evaluated as a method to keep contaminants <br /> from migrating to the adjacent parcels. <br /> 4315 Waterloo Road, Stockton <br /> EHD staff was not available to discuss this site. <br /> 1160 Yosemite Avenue Manteca <br /> A work plana addendum will be submitted to EHD that Will possibly include installing another <br /> monitoring well or advancing a CPT boring located north of the site to investigate the groundwater <br /> contamination north of MW-3 and MSU-4. There are safety issues to consider since this site is <br /> located at a busy intersecrion in Manteca. <br /> I <br />