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' 21 June 2002 <br /> AGE-NC Project No 99-0624 <br />' Page 6 of 6 <br /> Except for MTBE, the extent of petroleum hydrocarbon-impacted ground water has been defined <br />' The vertical as well as the southern lateral extent of MTBE-impacted ground water are still <br /> undefined <br /> 5.0 RECOMMENDATIONS <br />' Based upon the CPT investigation results during the fourth quarter 2001, AGE recommends <br />' • Continued quarterly ground water monitoring, the next quarterly ground water monitoring <br /> event is tentatively scheduled for June 2002 <br />' • Performance of a receptor survey to locate potential receptors within 2,000 feet of the site <br /> • Preparation of a feasibility studies work plan to evaluate soil and ground water remediation <br /> alternatives at the site <br /> I • Preparation of a monitoring well installation work plan to assess petroleum-impacted ground <br /> water near the product lines, near the current fuel dispensing area and downgradient of <br /> MW-2 <br />' 6.0. 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 mainly <br /> upon analytical results provided by an independent laboratory Evaluation of the hydrologic <br />' conditions at the site for the purpose of this investigation was made from a limited number of <br /> available data points (CPT data and ground water samples), and subsurface conditions may vary <br /> away from these data points No other warranty,expressed or implied,is made as to the professional <br />' interpretations, opinions and recommendations contained in this report <br />' 7.0. REFERENCES <br /> Robertson, P K , 1990, Soil classification using the cone penetration test Canadian Geotechnical <br /> Journal, v 27 <br />' Advanced GeoEnvi ro n mental,Inc <br />