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• <br />Ll <br />INVESTIGATIVE RESULTS <br />11 <br />The 550 -gallon UST was excavated by AEMC on 23 April 1991. The 2,000 -gallon UST was <br />• <br />excavated by AEMC on 24 April 1991. No cracks or corrosion were observed on either <br />tank. No leaks or product staining were observed on the exterior walls of the tanks. <br />• All associated tank piping appeared to be in good shape with no rust or leaks. <br />No groundwater was observed in either excavation. <br />Two soil samples were collected from beneath the 2,000 -gallon tank (samples Tl -A and <br />Tl -B), and one sample was collected from beneath the 550 -gallon tank (sample T2 -A) and <br />• were submitted for laboratory analysis. Two additional soil samples (samples SPLA and <br />SP1B) were collected from the soil stockpile. The stockpile soil samples were composited <br />in the laboratory into one sample. The following table provides a summary of analytical <br />• results. Copies of the laboratory reports and Chain -of -Custody forms are presented in <br />Appendix D. <br />• Laboratory analytical tests of boring samples indicate that the soil in the base of these <br />borings had no detectable concentrations of volatile organic compounds or TPH-Diesel. <br />Laboratory analytical tests of the composite sample collected from the soil stockpile <br />• indicated that no detectable concentration of volatile organic compounds or TPH-D were <br />found. <br />U <br />® Tim-Wd") Page 10 <br />AMERICAN <br />