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I <br /> present at the site Remediation of such low hydrocarbon concentrations would be <br /> ineffective <br />' 5.2 Hydrocarbon Impacted Groundwater <br />' TPH as gasoline and diesel were detected in the downgradient well (MW-4) The extent of <br /> impacted groundwater has therefore not been defined We recommend the installation of <br /> an additional monitoring well downgradient of MW-4 Since Grant Line Road is <br />' immediately north of MW-4, the new well will need to be placed on the north side of Grant <br /> Line Road A drilling permit and an encroachment permit or pei mission from the respective <br /> property owners will need to be obtained prior to any drilling off-site <br /> The Highest concentrations of petroleum hydrocarbons were detected in MW-4 Pea gravel <br /> was encountered during the drilling of MW-4, possibly indicating the previous location of <br />' an irrigation ditch Impacted groundwater may be collecting in this space, or hydrocarbons <br /> may have entered the groundwater in this area by following the path of the ditch This might <br /> explain the higher concentrations of hydrocarbons in MW-4 <br /> 6.0 LIMITATIONS <br /> IOur professional services were performed using that degiee of case and skill ordinarily <br /> exercised by environmental consultants practicing in this or similar localities The findings <br /> were based upon analytical results provided by an independent laboratory Evaluations of <br /> the geologic/hydrogeologic conditions at the site for the pui pose of this investigation are <br /> made fioni a limited number of available data points (i e nionitoi iiig wells, soil boirirgs) and <br />' subsurface conditions may vary away fioni these data points No other waiianty, eapiessed <br /> or implied, is made as to the professional recommendations contained in this report <br /> I <br /> —6&—o A"I S.— I— Y O <br /> SG94 OB 1010.02CnH l,ws Ga.A r—d OR 1/12 9 1 <br /> 1 <br /> I <br />