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4.3.6 Purgeable Aromatic Halocarbons <br />Purgeable Aromatic Halocarbons were not detected in groundwater samples collected from MW-1 <br />and MW-4. <br />4.3.7 Elemental Sulphur <br />Elemental sulphur was detected in both MW-1 and MW-4 at concentrations of 146,000 µg/L, and <br />153,000 µg/L respectively. Elemental Sulphur was detected at 152,000 µg/L in the duplicate sample <br />from MW-4 (MW-00). There is presently no MCL for elemental sulphur in groundwater. <br />4.3.8 Sulfates <br />Sulfates were detected in both MW-1 and MW-4 at 410,000 and 440,000 p.g/L respectively. <br />There is no MCL for sulfates in groundwater. <br />4.3.9 Sulfide <br />Sulfide was not detected in groundwater samples collected from MW-1 and MW-4. <br />Comprehensive laboratory analytical data reports are presented in Appendix B. <br />4.4 SUMMARY <br />Copper and lead were both detected in Parcel III near surface soil at concentrations that exceed <br />their respective STLCs. The extent of elevated levels of copper appears limited to the near surface soils <br />along the conveyor system easement and in the area of the former copper concentrate stockpile. The <br />extent of elevated levels of lead appears limited to the near surface soils in the area of the adjoining <br />conveyor near the dockside boom tower. <br />TRPH was detected in Parcel III from both near surface soils and the capillary fringe. The <br />concentrations of 'FRPH detected are generally low for the analytical method. <br />Acetone was the only VOC detected in Parcel III soil. The distribution of acetone is limited to <br />a single detection in the capillary fringe. <br />SAC28.013 <br />18 <br /> December 20, 1991 <br />n A 7.417C R- Vfe".