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1 <br /> 11 <br /> the survey There have been no reports by the City (the purveyor of dunking water) of dunking water <br /> Problems caused by petroleum contaminants to their wells Further, the site aquifer lies stratigraphically <br /> above and is separated from the underlying pumping aquifer <br /> The well data information gathered by WRIGHT is complete from readily available published and <br /> unpublished State and local agency sources, and addressed the PHS EHD request The well location <br /> information is as complete as the official records are for these wells The lack of other information <br /> (pertaining to location depth, length of seals, lithology logging, etc) anses from the incomplete form <br /> completion, filing or form submittal to agencies in the past There are no other well information sources <br /> available to WRIGHT 4this time <br /> Response to Groundwater Flow Directions <br /> Wnght has supplied all the histonc groundwater flow data to the PHS-EHD in both measurement and <br /> plotted format in quarterly reports A "rose" diagram is somewhat inappropriate to portray groundwater <br /> flow since flowlines are overlain upon plots of groundwater elevation for flownets These flowlines and <br /> flownets may change azimuth directions with changing water levels, and aquifer recharge and discharge <br /> However, the attached map (using the June, 1999 groundwater contour plot as a site reference) is <br /> supplied with the compass directions which group the range of histoncally observed groundwater flow <br /> directions One groundwater flowline trend (N9E) represents the most histoncally consistent observed <br /> site flow direction (see Figure 2) Based upon these long term observations, the wells plotted in the well <br /> search are not present along lines of surmised contaminant flow, and the wells are far beyond the <br /> mapped extent of the M & M plume <br /> Request for Geologic Cross Sections of Excavated Area <br /> PHS EHD requested that a geologic cross section be prepared for the excavated area The section is <br /> attached (see Figure 3) <br /> Reguest for Estimated Contaminant Mass Removed and Remaining <br /> An estimate of contaminant mass removed and remaining is estimated as presented below An estimate <br /> of contaminant mass is based upon the samples collected, chemical analytical data and the quantity of <br /> soil removed Please note that these are estimates based upon the available data Wnght has <br /> forwarded a letter to PHS EHD regarding the quantity of soil and groundwater removed from the former <br /> tank pit vicinity A total of 227 71 tons (or about 170 cubic yards) of soil and approximately 5,000 gallons <br /> of water were removed and properly disposed <br /> The soil stockpile sample, tank pit and water sample from tank pit data are tabulated below <br /> n-_- e <br />