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28 August 2003 <br />AGE -NC Project No. 03-1063 <br />Page 6 of 7 <br />BTEX and MTBE were not detected in any of the soil samples. <br />TPH-hf was detected in sample EX1B (southern excavation wall) and EX1C (northern <br />excavation wall) at concentrations of 9,400 mg/kg and 230 mg/kg, respectively. <br />Low concentrations of Zinc, ranging from 2.1 mg/kg to 11 mg/kg, were detected in each of <br />the six soil samples. <br />Analytical results of soil samples are summarized on Table 1. The laboratory reports (CTEL I.D. No. <br />0307-125-1 through 0307-125-6), quality assurance and quality control (QA/QC) report and chain - <br />of -custody forms are included in Appendix D. <br />5.0. SUMMARY AND CONCLUSIONS <br />Based on the data collected from the site, AGE finds: <br />• Approximately 90 tons of hydraulic -fluid impacted soil was excavated from a former <br />hydraulic lift area. Impacted soil did not appear to be present at depths in excess of 14 feet <br />bsg (the floor of the excavation). <br />• Only TPH-hf was detected in soil samples collected from the southern and northern walls of <br />the excavation. No volatile aromatics were detected in any of the soil samples collected. <br />• The State of California has no established cleanup standard or goal for hydraulic fluid in soil. <br />A small volume of impacted soil remains in place at the site. However, since no volatile <br />aromatics are present, it is unlikely to be of significant environmental concern. <br />• No contamination was confirmed in monitoring wells previously sampled at the site. The <br />wells were abandoned under permit from the SJCEHD. <br />6.0. RECOMMENDATIONS <br />In the absence of regulatory directives for additional assessment and/or remediation at the site, we <br />do not recommend further excavation or assessment at this time. <br />Advanced GeoEnvironmental, Inc. <br />