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Table 7 <br /> Groundwater Analytical Data-Metals <br /> South Shore Parcels-Parcel 2A and Adjacent Areas <br /> West Weber Avenue and North Lincoln Street <br /> Stockton, California <br /> Hex- <br /> avalent <br /> Sample Date Al Sb As Ba Be Ca Cd Cr Co Cu Pb K Mo Mn Na Ni Se Ag TI V Zn Hg Cr <br /> ID (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) <br /> Explanation(cont.): <br /> =Due to degredation of the spiking standard,the percent recovery of this analyte was below the lower control limit. <br /> 2=The spike recovery was outside acceptance limits for the MS and or MSD. The batch was accepted based on acceptable LCS/LCSD recovery. <br /> 3 =Samples collected by Clayton Group Services for Unocal: Lincoln/Weber. <br /> ' =Date sample prepared. <br /> e =Matrix spike recovery is not within the control limits. <br /> 6 =Samples collected by Wallace Kuhl for Unocal:Lincoln/Weber. <br /> ' =The recovery of one CCV was greater than the accepance limit. However,all analytes in associated samples were ND;therefore,a re-analysis was not performed. <br /> $=Wallace-Kuhl did not sample due to ongoing negotiations with the City and the Regional Board. <br /> s=Wells destroyed in November 2008 as part of the Unocal excavation activities by Treadwell and Rollo. <br /> 10=Metals analysis was inadvertently left off the COC when samples were submitted to the lab; by the time Stantec received the data back from the lab,the samples were out of hold time;therefore the analysis was not run. <br /> 11 =The recovery in the LCS is above control limits indicating a high bias.Since it was not detected above the Method Reporting Limit, no data was flagged. <br /> Stantec <br /> I:\Tidewater\TW Stockton(Parcel 2A-0415)\Tables\QMR Tables\2010\4Q10\20101117-Parcel2A(Tables 4,5,6,7)Historical GW Tables 4Q10.xls Page 45 of 45 <br />