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i <br /> it I <br /> 4.4 Confirmation Soil Sampling (Second Round) <br /> At the request of the County, a second round of confirmation soil samples were ! <br /> collected on November 23, 1992, from the West Excavation (beneath the former waste <br /> oil UST). Six (6) soil samples were collected by FGL and transported to FGL under the <br /> direct supervision of, and at locations specified by Mr. Infurna of the/ County. The <br /> sample locations are shown on the Site Map included as Exhibit 2. ! <br /> 4.5 Analytical Results - Confirmation Soil Samples (Second Round) <br /> The six (6) soil samples collected form the West Excavation during the second round <br /> of sampling were analyzed by FGL in accordance with State guidelines and EPA <br /> protocols. All six samples were analyzed for Semi-volatile Organics (EPA 8270), TTLC <br /> Metals (EPA 6010 for Cadmium, Chromium, Nickel, and Zinc; and EPA 7420 for Lead), <br /> VOH (EPA 8010), BTEX (EPA 8020), TPHg and TPHd (EPA 8015M), TOG (EPA 418.1), <br /> and PCB's (EPA 8080). The detection limits were 1.0, 2.0, or 5.0 mg/kg for Semi- <br /> volatile organics, 3.0 or 4.0 mg/kg for TTLC Metals, 5.0 mg/kg for VOH, 0.005 mg/kg for <br /> BTEX, 1.0 mg/kg for TPHg, 10.0 mg/kg for TPHd and TOG, and 2.0 mg/kg for PCBs. <br /> The laboratory reports, quality assurance, and chain-of-custody documents are <br /> included as Appendix B. <br /> I <br /> 4.6 Discussion of Analytical Results - Confirmation Soil Samples <br /> Non-detectable concentrations of TPHg and BTEX were reported in all six (6) <br /> confirmation soil samples collected from the East Excavation. Non-detectable TOG <br /> and VOH concentrations were also reported in the five (5) confirmation soil samples <br /> first round) collected from the West Excavation, and non-detectable concentrations of <br /> soluble nickel was reported for sample WO-10. <br /> Analytical results of all six (6) confirmation soil samples collected in the second <br /> sampling round indicated non-detectable concentrations of Semi-volatile organics, <br /> VOH, BTEX, TPHg, TPHd, and PCB's; and background concentrations of the five (5) <br /> TTLC Metals. Non-detectable concentrations of TOG were also reported for five of the <br /> six samples, with a minimal concentration of 30 mg/kg TOG reported for sample "South <br /> Wap at 17"'. Exhibit 3 is a cross-section oriented from west to east which shows the <br /> excavations, confirmation soil sample locations, and test boring locations that lie along <br /> line A-A' on Exhibit 2. <br /> I I I <br /> 7 of 10 <br />