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each well were over 1 5 GPM Samples with a bailer were taken after a minium of 10 volumes of <br /> @ water were pumped <br /> SUMMARY OF FINDINGS <br /> The deepest monitoring wells ( MW#I, MW#2D, MW#3D, MW#4D) all indicated low levels of <br /> Xylene contamination in water samples (0 4 to 0 b ug/L) MW#3S indicated some low level BTEX <br /> contamination in two soil samples (MW#3@45, MW#3@50) and in the water sample MW#2 soil <br /> samples were clean, but the MW#2S water sample had a level of Xylene slightly above the <br /> detection level All water samples from MW#2S,MW#2D,MW#3S,MW#3D,produced low levels <br /> of 1,2-Dichloroethane contamination <br /> The water sample and the two soil samples on MW43S had a solvent odor The water table in <br /> MW#1 has raised eight feet from the last water surface measurement in February 1997 The water <br /> table flow gradient has a bearing of S75deg E at a slope of 0 004 MW#3 lies in a direct line with <br /> excavation for solvent Tank#1 and has the highest concentration of contamination (see soil bore <br /> layout by X-Y axis) Oxygenates were not present in any of the soil or water samples analyzed <br /> CONCLUSION <br /> Xylene continues to be found in the same low concentration in the monitoring wells that are deeper <br /> than fifty feet The source of this contaminate may not be Tank#1 The source of Dichoroethane <br /> found in MW#2D, MW#2S, MW#3S,MW#3D most likely is from the solvent Tank#1 The extent <br /> of the contamination plume from Tank#1 in now known to lie under and east of the tank location <br /> Solvent has traveled down to the shallow aquifer under the property and moved by water transport <br />• to the east of the Vogue Cleaners property line <br /> RECOMMENDATIONS <br /> The author recommends that all monitoring wells be sampled for the next two quarters to determine <br /> if contamination levels change There is no evidence from the information gathered to date that <br /> would warrant further subsurface investigation <br /> Please contact this office if any question arise from this report <br /> Respectfully submitted, <br /> Foothill inee g - <br /> or -IF <br /> E <br /> Ervin Rifenb g �' r <br /> ' % ,0:� Exp K <br /> cc Norman Higgins s <� h <br />• <br /> 3 <br />