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locations as approximately shown on Plate 2. We understand that no follow-up had been performed <br /> prior to the current investigation required by the SJCEMD. The site is presently utilized by Laidlaw <br /> Transit as a dispatch yard and repair shop for small school buses. Laidlaw apparently began use of the <br /> property after removal of the above-described tanks. Laidlaw's use appears to include an oil/water <br /> separator and an above-ground waste oil tank, but no underground fuel tanks. <br /> COMPLETED SCOPE OF WORK <br /> GENERAL <br /> The investigation has included the drilling of three borings around each of the two former tank locations <br /> (six total borings). The purpose of the borings has been to assess the horizontal and vertical impact of <br /> former tank usage on both soils and groundwater. The borings were drilled into first groundwater, <br /> encountered at a depth of about 16 feet. Both soil and groundwater samples were collected for chemical <br /> testing. A list of specific tasks is presented below. <br /> SPECIFIC TASKS <br /> • Prepared and followed a site specific Health and Safety Plan. <br /> • Conducted an underground utility survey. <br /> • Obtained SJCEMD drilling permits. <br /> • Performed field work under the direct supervision of a California Registered <br /> Geologist. <br /> • Drilled six borings into first groundwater(encountered at about 16 feet). <br /> • Collected soil samples at 5-foot depth intervals. <br /> • Screened soils for petroleum vapors and selected one sample from each boring <br /> for chemical testing. <br /> • Over-drilled each boring a few feet into first encountered groundwater and <br /> collected samples through the hollow-stem augers with new disposable bailers. <br /> • Backfilled the six borings with a cement slurry and 3-5%bentonite (powder). <br /> • Submitted the three soil and three water samples from the waste-oil borings to <br /> a California-certified laboratory for the state waste-oil testing including motor <br /> oil,diesel,gasoline,BTEX,TRPH,PNAs,PCBs,halogenated solvents, and the <br /> state's five waste-oil metals by the EPA 8015m, 8260, 1664, 8270, 8082, and <br /> 6010/200.7 procedures. The water samples have been tested for dissolved <br /> metals. <br /> • Submitted the three soil and three water samples from the diesel-tank borings <br /> for analysis including diesel, gasoline, BTEX, MTBE, and lead by theEPA <br /> 8015m, 8260, and 6010/200.7 methods. The water samples were tested for <br /> dissolved lead. <br /> • Properly containerized and labeled soils and waters generated during the work. <br /> • Prepared this summary report. <br /> Ramcon H:\WPDATA\1070-2JANDRSON\REPORTS\InvRep Page 2 of 4 <br />