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i t <br /> AMBRIA <br /> CONCLUSIONS <br /> Historical groundwater flow direction for this site has been toward the northeast Ever since we <br /> have incorporated groundwater elevation data from tank pit backfill well BF-1 into the <br /> groundwater contour map, the groundwater flow direction has been variable at this site We have <br /> notice that groundwater elevations the three monitoring wells (MW-IA, MW-2A, and MW-3A) <br /> are relatively similar to each other in elevation and that the groundwater level in BF-1 is not <br /> similar in elevation to any of the three other monitoring wells We have also reviewed <br /> groundwater contour maps generated for the Chevron site located north of the Shell site The <br /> groundwater flow direction at the Chevron site is typically toward the northeast, which is the <br /> same as the historical groundwater flow direction for the Shell site <br /> Based on this analysis it appears that groundwater elevation data from BF-1 may not represent <br /> true groundwater conditions and therefore should not be used in preparation of groundwater <br /> contour maps for this site Groundwater elevation data from BF-1 was not used this quarter for <br /> preparing the groundwater contour map <br /> • CLOSING <br /> If you have any questions regarding the contents of this document, please call Joe Neely at <br /> (707) 933-2361 <br /> Sincerely, <br /> Cambria Environmental Technology, Inc. <br /> Lisa Summers <br /> Staff Scientist <br /> U cv <br /> Joe W Neely,RG 4 <br /> Senior Project Geologist <br /> RG 6927 C No 6927 ° <br /> �OF Cp,L1CA� <br /> • <br /> 0813 2 <br />