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bm %of �ftw <br /> VM <br /> (mg/kg), respectively. The concentrations of lead appear to represent background levels for soil <br /> in the area and are well below the most stringent San Francisco Bay Regional Water Quality <br /> r Control Board Environmental Screening Level for lead in soil of 150 mg/kg. <br /> 6.0 SITE RESTORATION AND WASTE DISPOSAL <br /> 6.1 SITE RESTORATION <br /> Upon completion of piping removal activities, the Site was restored to pre-excavation <br /> ` conditions in conjunction with other site activities. The Site was repaved to match the existing <br /> surface conditions on October 15, 2007. <br /> 6.2 WASTE DISPOSAL <br /> The removed piping was saw-cut and placed in a DOT approved, properly labeled, 55-gallon, <br /> ` steel drum and stored temporarily at the Site. Since the piping was not decontaminated, they <br /> were handled as hazardous waste in accordance with SJCEHD requirements. The waste was <br /> removed by PSC-Benicia on November 8, 2007 and delivered to an approved disposal facility <br /> in Fernley,Nevada. Waste disposal documentation is included in Appendix C. <br /> 7.0 SUMMARY AND CONCLUSIONS <br /> In October 2007, four pipes associated with two former 6,000-gallon gasoline USTs were <br /> removed from the Site for permanent closure. The USTs were removed for permanent closure <br /> 4 in 1987. Two soil samples were collected beneath the piping and submitted for laboratory <br /> analyses. No petroleum hydrocarbon constituents were detected in the samples. <br /> Concentrations of lead in the samples appear to represent background levels for soil in the area. <br /> The piping was transported offsite and properly disposed as hazardous waste. The area was <br /> restored to pre-excavation conditions in conjunction with other site activities. <br /> No further action appears necessary, regarding the gasoline UST piping. However, the former <br /> 6,000-gallon gasoline UST systems are the subject of an open environmental case with <br /> ` SJCEHD, which is under the oversight of Ms. McCartney. Therefore, a copy of this report will <br /> be provided to Ms. McCartney and be uploaded to the State of California GeoTracker database. <br /> Ir <br /> SLAIR 2007.11 Pipline Removal Report 4 <br /> V <br />