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31 July 1996 <br /> AGE-NC Project No 95-0105 <br /> ' Page 5 of 6 <br /> ' "hydrocarbon-impacted soil was not detected in samples collected from MW-6, indicating that the <br /> northern limit of impacted soil is near the center of Grantline Road <br /> ' Most impacted soil at the site appears to be present within the capillary fringe or saturated zones <br /> Therefore, we do not recommend active remediation of remaining hydrocarbon-impacted soil at the <br /> site <br /> l <br /> 4 2 HYDROCARBON-IMPACTED GROUND WATER <br /> ' <br /> High concentrations of TPH and BTE&X were detected ed the water samples collected from MW-4, <br /> ' located on the northwest corner of the property Low concentrations of benzene were detected in well <br /> MW-3 during the May 1996 monitoring event Petroleum hydrocarbons were not detected in wells <br /> MW-1, MW-2, MW-5 or MW-6 <br /> The apparent down gradient extent of the petroleum hydrocarbon-impacted ground water has been <br /> defined The location of MW-5 appears to represent the northeastern limit of hydrocarbon impacted <br /> ground water, while the Iocation of MW-6 represents the extreme northern limit of the hydrocarbon <br /> impacted ground water <br /> ' Based upon concentrations of BTE&X and TPH in MW-4, remediation of hydrocarbon-impacted <br /> groundwater at the site maybe justified If groundwater remediation is required, feasibility testing <br /> should be performed to determine acceptable remedial alternatives for the site <br /> ' Well MW-6, which presently represents the northern limit of g <br /> impacted round water, is located <br /> P <br /> approximately 55 feet northwest of MW-4 Consideration should be given to the installation of an <br /> additional ground water monitoring well near the location of probe boring P2 (see Quarterly Report- <br /> Janua?y 1996) in Grant Line Road to more precisely define the lateral extent of impacted ground <br /> water Furthermore, an additional monitoring well should be considered southeast of MW-3, as <br /> samples collected from MW-3 may not be representative of aquifer conditions at the site due to the <br /> extensive excavation in the immediate vicinity <br /> ' The next quarterly monitoring is scheduled for August 1996 if additional monitoring wells and/or <br /> feasibility testing is required, field work should be conducted during August 1996 <br /> 5.0. LIMITATIONS <br /> ' Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> . environmental consultants practicing in this or similar localities The findings were based upon <br /> ' t i d <br />