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'i <br /> _ � •.� 05 June 2003 <br /> AGE-NC Project No. 97-0360 <br /> Page 3 of 4 <br /> ; j <br /> concentration of 920 µg/1. No other analytes were detected at-or above laboratory reporting limits <br /> in the ground water samples analyzed. <br /> The analytical results of ground water samples are summarized on Table 2. The laboratory report <br /> (CTEL Project No. CT214-0303158), QA/QC report and chain-of-custody form are included in <br /> Appendix C. <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based on the data collected from the site, AGE concludes: <br /> • Ground water flow at the site on 21 March 2003 was inferred to be toward the north at a <br /> gradient of 0.002 feet/feet. The gradient and direction has remained stable for the previous <br /> four quarters. <br /> • TPH-g concentrations decreased in well EW1 this quarter when compared to last quarter <br /> while the TPH-d concentration increased in this well.No other hydrocarbon compounds or <br /> fuel oxygenates were detected this quarter,similar to previous monitoring events(Table 2). <br /> With the exception of TPH-d,the lateral extent of petroleum hydrocarbon-impacted ground <br /> water has been defined in all directions. TPH-d is not completely-defined east of the former <br /> UST area. A map illustrating the approximate extent of dissolved TPH-g and TPH-d is <br /> presented m Figure 4. <br /> • The vertical extent of hydrocarbons-impacted ground water has been defined and does not <br /> extend-below 35 feet bsg. <br /> 5.0. RECOMMENDATIONS <br /> Based on the-findings of the environmental activities recounted in this report, AGE recommends <br /> continued quarterly ground water monitoring. The second quarter monitoring event was performed <br /> in May 2003. <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 upon <br /> analytical results provided by an independent laboratory.Evaluation ofthe hydrogeologtc conditions <br /> at the site for the purpose of this investigation was made from a limited number of available data <br /> Advanced GeoEnvironmental,Inc.. <br />