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Quarterly Monitoring Report Page 7 <br /> Morton-Alco&Unocal Operable Units April 27,2007 <br /> ' WKA No. 6324.02 <br /> Volatile OrganicL Hydrocarbons <br /> • sec-Butylbenzene <br /> ■ MW5 at 2.2 µg/L <br /> ' • n-Butylbenzene <br /> ■ MW5 at 0.62 ltg/L <br /> • tert-Butylbenzene <br /> ■ MW11 at 0.58 µg/L <br /> ■ MW38 at 0.70 µg/L <br /> • n-Propylbenzene <br /> ■ MW5 at 9.0 µg/L <br /> • Isopropyl benzene <br /> ' ■ MW5 at 8.8 µg/L <br /> ■ MW6 at 10 µg/L <br /> ■ MW38 at 0.83 µg/L <br /> • Napthalene <br /> ■ MW5 at 0.54 µg/L <br /> Semi-Volatile Organic Hydrocarbons <br /> ' • No SVOCs were detected at or above the laboratory reporting limits. <br /> Dissolved Metals <br /> • Arsenic <br /> ■ MW3 at 105 µg/L <br /> ■ MW5 at 27.7 µg/L <br /> ' ■ MW38 at 16.3 µg/L <br /> ■ MW39 at 118 µg/L <br /> • Copper <br /> ■ MW3 at 5.93 µg/L <br /> • Lead <br /> ■ MW3 at 10.8 µg/L <br /> ■ MW6 at 12.1 µg/L <br /> ■ MW7 at 10.8 µg/L <br /> ■ MW37 at 11.5 µg/L <br /> • Nickel <br /> ■ MW3 at 14.5 µg/L <br /> ■ MW7 at 6.47 µg/L <br /> • Thallium <br /> ■ MW7 at 16.5 µg/L <br /> • Zinc <br /> ■ MW3 at 53.1 µg/L <br /> ■ MW5 at 10.2 µg/L <br /> ■ MW6 at 62 µg/L <br /> ■ MW7 at 153 µg/L <br /> ■ MW8 at 25.5 µg/L <br />