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C..,v/ATC <br /> A S S p C 1 A T E S I N C <br /> 9) to 800 mg/L (MW-3) Aluminum in the groundwater samples collected from MW-1 through <br /> MW-9 ranged from <0 05 to 0 320 mg/L with MW-7 being the highest Calcium In the <br /> groundwater samples collected from MW-1 through MW-9 ranged from 74 mg/L (MW-4) to 240 <br /> mg/L (MW-3) Chloroform was the only VOC detected In MW-1 through MW-9 ranging from <br /> 1 60 mg/L (MW-5) to 65 mg/L (MW-2) <br /> Analytical results are summarized in Table 2 Laboratory data sheets and chain-of-custody <br /> documentation are provided in Attachment 2 <br /> DISCUSSION AND CONCLUSIONS <br /> Based on a review of previous work performed at this site and the data presented in this report, it <br /> can be concluded that the groundwater gradient direction on January 19, 2005 is generally <br /> consistent with historical data <br /> The groundwater samples collected from monitoring wells MW-1, MW-2, MW-4, MW-5 and <br /> wells MW-7 through MW-9 contained concentrations of Cr +6 at levels above the laboratory <br /> method detection limit but below the California Primary MCL for total chromium Only the <br /> samples collected from wells MW-3 and MW-6 contained Cr +6 concentrations in excess of the <br /> California Primary MCL for total chromium The Cr +6 concentration In the samples collected <br /> lie from MW-3 decreased and MW-6 increased since the last monitoring event Groundwater <br /> samples collected from MW-1 through MW-9 each contained chloroform above the California <br /> Primary MCL <br /> s lenvirenmenta11625831quarterlyllgr-2005 doc 3 <br /> E <br />