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i <br /> 15 dune 2009 <br /> AGE-NC Project No.05-1306 <br /> I Page 29 of 33 <br /> TABLE 8-2 <br /> FRACTIONS OF CARBON COMPOUNDS IN GROUND WATER <br /> w FROM MW-3 AND MW-4 <br /> t MW-3 MW-4 <br /> Constituent Concentration Mass Fraction Concentration Mass Fraction <br /> (g 2) ( g/L) <br /> C10-C12 Aliphatic ND ND <br /> C12-C16 Aliphatic 626 0.326 72.9 0.29 <br /> f <br /> C16-C21 Aliphatic 799 0.416 . 94.6 0.378 <br /> C21-C34 Aliphatic 89 0.046 ND - <br /> C12-C16 Aromatic 69.5 0.036 ND - <br /> C16-C2' Aromatic 338 0.176 83.0 0.332 J <br /> C21-C34 Aromatic ND - ND - # <br /> Extractable Pet Hy 1,920 1.0 250 <br /> f Notes. <br />{ gg/L: micrograms per liter <br /> 8.6. POPULATION EXPOSURE POINTS <br /> The current and future receptor populations are Penny Newman Grain Company employees and <br /> residents or commercial users in the down gradient direction of the site. This facility constructed in <br /> the late 1940s to 1950s continues its operations in an industrial area. Based upon zoning and land <br /> use plans, this area will remain in industrial use. <br /> The down gradient residents and commercial users could potentially be exposed through ingestion, <br /> dermal contact or inhalation. However; all potential risks are deemed to be low given the nature, <br /> location,plume stability, and level of residual TPH-d-impacted ground water. The following table <br /> summarizes the exposure route information that is utilized to quantify risk.. <br /> I � <br /> k <br /> I Y <br /> i Advanced GeoEnvironmental,Inc. <br /> i <br />