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i <br /> 4- iz <br /> ATC Associates Inc. <br /> 1117 Lone Patin Avenue; Suite B <br /> 3 `r" Modesto,California 95351 <br /> vT4; <br /> 209-579-2221 <br /> Fax:209-579-2225 <br /> ASSOCIATES INC. <br /> f <br /> 1 - <br /> GEOTRACKER DATA UPLOAD <br /> ' The depth to water and•laboratory data associated with the fourth quarter 2005 sampling event <br /> were also submitted ,electronically to the SWRCB Geotracker database (confirmation numbers <br /> ± 7033070206 and 7934645414, respectively). Documentation of the data submittal and the <br /> surveyor's report is contained in Attachment 3. <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> The laboratory analytical results of the groundwater samples collected on October 20, 2005, are <br /> generally consistent with recent historical results. - The concentrations of COCs detected in the <br /> samples collected from the monitoring wells both increased and decreased with respect to the <br /> previous sampling event, but the fluctuations are slight and generally remain within the range of <br /> i historical results. Based on recent groundwater quality data associated with groundwater samples <br /> collected from the site, ATC recommends no further action. <br /> �.J <br /> If you have any questions or comments regarding this matter, please contact our.office at (209) <br /> 579-2221. <br /> Respectfully submitted, <br /> ATC Associates Inc. <br /> Stephanie Davi <br /> Staff Geologist <br /> I. <br /> a s c t <br /> eanne Homsey, RE; <br /> 4 ` <br /> CA Registered Civil Engineer No. 47410 <br /> s:\Environmental\17861\reports\4gnn2005.doc 5 ATC Associates Inc. <br /> I " <br /> i <br />