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25 March 2005 AGE-NC Project No 97-0311 Page 3 of 3 4.0. SUMMARY AND CONCLUSIONS Based on the data collected from the site, AGE concludes: • Groundwater was encountered at approximately 47.6 feet bsg.Groundwater flow was south to southwest across the site at a gradient of approximately 0.0024 ft/ft. • No target analytes were detected in ground water samples collected at the site. 5.0. RECOMMENDATIONS Based on the findings of the environmental activities recounted in this report, AGE recommends: • Previous site assessment and ground water monitoring conducted over three quarters has demonstrated no solvent impact to ground water at the site. No continuation of the monitoring program is required. • No significant mass of solvents were detected in soil samples collected near the former work area at the northeast corner of the site,nor were solvents of concern detected in soil samples collected down-gradient of the working areas.Low concentrations of PCE were detected in shallow soil samples near the northwest edge of the site and detected in low concentrations from within soil vapor samples collected in 1997. These low concentrations do not pose a sufficient threat to ground water to continue the site investigation nor the effort (costs) of remediation; therefore, site closure should be granted. Monitoring wells may require destruction or transfer to the City of Lodi. 6.0. LIMITATIONS Our professional services were performed using that degree of care and skill ordinarily exercised by environmental consultants practicing in this or similar localities. The findings were based upon analytical results provided by an independent laboratory.Evaluation of the geologic/hydrogeologic conditions at the site for the purpose of this investigation was made from a limited number of available data points(ground water samples)and subsurface conditions may vary away from these data points.No other warranty,expressed or implied,is made as to the professional interpretations, opinions and recommendations contained in this report. Advanced GeoEnvironmental,Inc.