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-1 TABLE 4 <br /> ELEMENTAL (TOTAL) SULPHUR IN SOIL <br /> EPA METHOD 6010 <br /> mg/Kg (ppm) <br /> t <br /> I <br /> SULPHUR .mglKg <br /> 7 BORINGDEPTH SAMPLE I.D. (Ppm) <br /> J <br /> MW-1 0.5 MW-113/0.5 737 mg/Kg <br /> 10.0 MW-lA/10.0 162 mg/Kg <br /> MW-1 10.0 MW-1B/10.0 187 mg/Kg <br /> Note: MW-lA/10.0 is a duplicate sample of MW-113/10.0 <br /> Sulphur is not a CAM metal and therefore not subject to the state of California STLC regulatory <br /> criteria. Additionally, sulphur has no DTSC numerical standard stated in the lists of RCRA Hazardous <br /> Wastes from Non-Specific Sources under the waste code for leachate resulting from the treatment, <br /> storage, or disposal of wastes (22 CCR, 66261.31). <br /> As shown in Table 4 the concentration of sulphur in Parcel III appears to decrease with depth. <br /> Typical background concentrations for sulphur in surface soils across the United States range from <800 <br /> to 48,000 mg/Kg, with an average of 1,600 mg/Kg (Shacklette and Boerngen, 1984). The concentration <br /> of elemental sulphur detected in both the near surface soil sample and the capillary fringe is below the <br /> low end of the background range, and well below the average. <br /> 4.1.8 Sulfates <br /> Sulfates were detected in all three samples analyzed. Sulfates detected in Parcel III soil are <br /> presented in Table 5. Comprehensive analytical laboratory data reports are included in Appendix B. <br /> . SAC28.013 <br /> 14 December 20, 1991 <br /> I>>M-'S S, nen^r;TZ,= <br />