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have ranged from 87,000 µg/L to 165,000 pg/L and benzene concentrations have ranged from <br /> 4,100 pg/L to 10,100 µglL in the MW-1 samples. GRO and BTEX impact to shallow <br /> groundwater is also observed in the vicinity of wells MW-2, MW-3, and MW-8. <br /> Relatively low concentrations of MTBE and TBA impact shallow groundwater beneath this site. <br /> MTBE has been reported at maximum concentrations of 46 pg/L (MW-1), 122 µg/L (MW-2), <br /> 17 µg/l, (MW-3), 43 µg/L (MW-8), and 1.8 µglL (MW-9). TBA has been reported in shallow <br /> screened wells MW-2 and MW-3, at maximum concentrations of 59 µglL and 29 µg/L, <br /> respectively. Given the results of the well MW-7 sampling events, dissolved MTBE impact <br /> extends to at least 121 feet bgs beneath the property. MTBE concentrations have ranged from <br /> 14 µg/l,to 27 µg/l, during historical sampling of well MW-7. <br /> Relatively high concentrations of 1,2-DCA have been detected in groundwater beneath this <br /> property. 1,2-DCA concentrations in shallow groundwater well samples have ranged from <br /> 300 µg/L to 1,060 µg/L (MW-1), 36 pg/L to 350 µg/L (MW-2), 220 µg/l, to 1,170 µg/L <br /> (MW-3), 520 pg/L to 890 pg/L (MW-8), and 22 µglL to 120 pg/L (MW-9). 1,2-DCA has also <br /> been detected in samples collected from each of 4 groundwater monitoring wells completed to 90 <br /> feet bgs, at maximum concentrations of 28 pg/L (MW-4), 61 µg/L (MW-5), 170 pg/L (MW-6), <br /> and MW-12 (2.7 µg/Q. 1,2-DCA impact beneath this site extends to at least 121 feet bgs, based <br /> on the findings of samples collected from well MW-7. <br /> • <br /> K:\ppache Plastics\Reportslapache-scm-assessment report2006.doc Page 14 STRATUS <br />