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22 December 1998 <br /> AGE-NC Project No 95-0128 <br /> Page 4 of 8 <br />' without the preservative Samples were placed in a chilled container and transported under chain-of- <br /> custody to MAI The water samples were analyzed in accordance with methods noted in section 2 2 <br /> 3 0. FINDINGS <br />' Ground water was Inferred to be flowing toward the north and contained significant hydrocarbon <br /> concentrations were detected only in the ground water sample collected from monitoring wells on <br />' the site Minor concentrations of fuel additives and diesel hydrocarbons were detected in the ground <br /> water samples collected from off site <br />' 31 STRATIGRAPHY <br />' <br /> During the installation of bonngs off site, light brown to brown, dry, sandy silt was encountered at <br /> 30 to 35 feet bsg Gray or tan,wet, coarse-sandy gravel was encountered from depths of 35 to 40 feet <br /> bsg An indurated clay generally underlaid the sandy gravel at depths of 40 to 60 feet bsg Ground <br /> water was present in the gravel and sand Petroleum hydrocarbon odor was not noted in the samples <br /> collected Stratigraphic cross sections are depicted in Figures 5, 6 and 7 <br /> 32 HYDROCARBON-IMPACTED <br /> SOIL <br />' The results of laboratory analysis of soil samples collected at the site over the last quarter are as <br /> follows <br />' 0 TPH-g, TPII-d and BTEX were not detected in any of the soil samples analyzed <br />' a The only oxygenated compound detected in any of the soil samples was MTBE, quantified <br /> at 180 micrograms per kilogram (,ug/kg) in the soil sample from boring B 16 at a depth of 40 <br /> feet bsg <br /> Laboratory results of soil samples analysis area summarized in Tables 1 and 2 The laboratory <br /> reports (MAI Laboratory ID No 88807 to 88822), quality assurance and quality control (QA/QC) <br /> and chain-of-custody forms are presented in Appendix C <br /> I <br /> Advanced GeoEmironmentat Inc <br /> I <br />