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AMBRIA <br /> The laboratory testing of these samples revealed that no gasoline constituents were present in any <br /> of the water or sediment samples collected The only exception to this was a low Ievel toluene <br /> (2 6 parts per billion) detection in the water sample collected from Baker tank at the Wisconsin <br /> Pump Station This low level detection is considered to represent background water quality in <br /> the stone drain,not a result of the spill <br /> CONCLUSIONS <br /> Bases on the updated information presented above regarding flow rate and duration, the <br /> maximum amount of spilled water could not have exceeded 1,635 gallons After evaluating the <br /> laboratory findings for the water and sediment samples collected, which show that gasoline <br /> constituents were not present in the storm drain above background levels, it appears likely that <br /> the spill was short lived and did not introduce a significant volume of water into the storm drain <br /> If you have any questions regarding this document, please call Joe Neely at (707) 933-2361 <br /> Sincerely, <br /> Cambria Environmental Technology, Inc. <br /> 9VI-1 - <br /> Joe W Neely, RG <br /> Senior Project Geologist <br /> 0783 6 <br />