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y,5 y� � V� e� �•�IFJ.� 'S'r .� �^ vim <br /> REPORT <br /> � c <br /> q <br /> Kayo oil Company - mast Gas station <br /> Boo 2. HighV4 12, Lodi, Ch. <br /> a; <br /> Soil and <br /> groundwater contamination have occurred as a 'result of <br /> y i <br /> leakage of petroleum <br /> k products from underground storage tanks at <br /> the Kayo Fast Gas Station site. The <br /> petroleum contamination <br /> extends a short distance from the bottom of the tank .pit into the <br /> underlying silty and sandy soils. <br /> These soils have allowed the <br /> hydrocarbons to percolate downward to the groundwater table at <br /> � 1A <br /> =i= <br /> about 40' under the site. The horizontal .distribution of <br /> Y <br /> petroleum hydrocarbons in groundwater is primarily limited to the <br /> y area immediately underlying the site <br /> with sfnor movement from <br /> fi4 <br /> i <br /> beneath the property off-site to the souttges ; :. The rage and <br /> y ' <br /> potential for off-site migration is low becaiAse of the Affective ! <br /> i <br /> s � control of.groundwater movement by the on_sittroue <br /> g dwater. <br /> depression Pump and free product recovery xY p x"1 operation. Ira.- <br /> Yr� addition, the local groundwater gradient is flat, so that the <br /> fF�5 rate of:horizontal migration is limited under natural canditiors. <br /> � F <br /> The I h dro eolo <br /> yk S <br /> Y g gy of the site is comprised of five g®olagic soil <br /> zones. f <br /> es The u _ �- - - --- -- - <br /> ppermost soil horizon is designated as zone.l, the <br /> deepest soil'herizon tested and also .a confined aquifer is sone <br /> S.: . zane 3 is an unconfinec? water table aquifer and zone 4 is an <br /> k. <br /> r — <br />