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f <br /> Table 5 <br /> Historical 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 Ba Be Ca Cd Cr Co Cu Pb K Mo Mn Na Ni Se Ag TI V Zn Hg Cr <br /> ID mil mil m11 mit m11 m11 mil m11mll mil m11 m11 mit Mill) mit m11 mil m11 m11 m11 m11 mil <br /> QA1QC Sampling < <br /> < <0.915 0.01 <br /> Method Blank 917104° --- <0.015 --- <OA01 --- <0.005 <0.005 --- <0.905 <0.01 --- --- --- --- <0.905 0.15 <0.005y < <br /> Equip.Blank 917104' --- <0.10 --- <0.01 --- <0.01 <0.01 -- <0.01 <0.05 --- --- --- --- <br /> <0.01 <0.10 <0.001 <0.10 0.11 0.0002 --- <br /> G <br /> Method Blank 216107 --- <0.015 --- <0.001 --- <0.005 <0.005 --- <0.005 <0.01 <O.OD5 <0.-- <OA05 <0... --- <--- --- <br /> Method Blank 1121108 --- <0.015 --- <0.001 --- <0.005 <0.005 0.005 --- --- --- --- --- <0.0005 --- <br /> Method Blank 1/22108 --- <0.015 --- <0.001 --- <0.005 <0.005 0.005 --- --- --- --- <0.0005 --- <br /> Method Blank 1123108 --- <0.015 --- <0.001 --- <0.005 <0.005 0.005 --- --- <br /> -- --- --- <D.0005 --- <br /> Method Blank 1124108 --- <0.015 --- <0A01 --- <0.005 <0.005 --- <0.005 "' --- --- <br /> --- --- --- --- --- <br /> Method Blank 1125108 --- <0.015 --- <0.001 --- <0.005 <0.005 --- <0.005 --- --- --- --- --- <0.0005 <br /> Explanation: <br /> ---=Not Analyzed Al=Aluminum Be=Beryllium Pb=Lead Se=Selenium <br /> FD=Field duplicate Sb=Antimony Ca=Calcium K=Potassium Ag=Silver <br /> mgll a Milligrams per liter As=Arsenic Cd=Cadmium Me=Molybdenum TI=Thallium <br /> <=Below given laboratory detection limit Be=Barium Cr=Chromium Mn=Manganese V=Vanadium <br /> U=upper groundwater zone Zn=Zinc Co=Cobalt Na=Sodium ND=Not detected;laboratory detection limit unspecified in historical tables. <br /> L=Lower groundwater zone lig=Mercury Cu=Copper NI=Nickel W-SSC=Water sample collected from Stockton Shipping Channel <br /> Note that As(Arsenic)was removed from this table and is now reported on Table 4. <br /> Due to degradation of the spiking standard,the percent recovery of this analyte was below the lower control limit. a=City of Stockton well;well not sampled this quarter. <br /> z=The spike recovery was outside acceptance limits for the MS and or MSD. The batch was accepted based on e=Wells destroyed in November 2008 as part of the Unocal excavation activities by Treadwell and Rollo. <br /> acceptable LCSILCSD recovery. 10=Metals analysis was inadvertently left off the GOC when samples were submitted to the lab;by the time Stantec <br /> s =Samples collected by Clayton Group Services for Unocal:LincolnlWeber. received the data back from the lab,the samples were out of hold time;therefore the analysis was not run. <br /> ° =Date sample prepared. "=The recovery in the LCS Is above control limits indicating a high bias.Since it was not detected above the Method Reporting Limit, <br /> 5 =Matrix spike recovery Is not within the control limits. no data was flagged. <br /> B =Samples collected by Wallace Kuhl for Unocal:LincolnlWeber. "=Matrix Spike/Matrix Spike Duplicate results were outside of control limits.This may indicate a bias for the sample that was spiked. <br /> =The recovery of one CCV was greater than the acceptance limit. However,all analytes in associated samples Since the LCS recoveries were within control limits,no data are flagged. <br /> were ND;therefore,a re-analysis was not performed. <br /> Stantec Page 46 of 46 <br /> 20126924-Parcel2A(Tables 4,5,5,7)Historical GW Tables 3()12-CL.xlsx <br />