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' 11369 NORTH HIGHWO 99 <br /> Project No 1001 <br />' August 28, 1997 <br /> . Page 6 <br /> CONCLUSIONS & RECOMMENDATIONS <br />' Based on our findings, the majority of petroleum hydrocarbon impacted soil (greater than 100 <br /> mg/kg TPH as gasoline) appears to be within the boundary identified on Figure 3, and extends <br />' vertically to a depth of 40 to 50 feet below grade Lower concentrations of TPH as gasoline <br /> and BTEX appear to have migrated vertically to ground water, based on trace concentrations of <br /> TPH as gasoline and BTEX in soil samples from B 10/MW 1, and the elevated concentrations of <br /> TPH as gasoline and BTEX in water samples from well MW 1 <br />' Petroleum hydrocarbons are present in ground water beneath the site, but the extent has not <br /> been evaluated To evaluate the extent of petroleum hydrocarbons in ground water beneath the <br />' site and assess ground water flow characteristics, we recommend the installation of additional <br /> ground water monitoring wells Additional soil investigation is not recommended at this time <br /> 1 <br /> 0 based on sufficient definition of petroleum hydrocarbons in soil <br /> 1 <br />