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Consistent with previous quarterly groundwater analytical results, the highest concentrations of <br /> gasoline compounds were detected in the sample collected from MW-1, which contained 89 8 <br /> micrograms per liter (µg11} of TPH-as-gasoline, 2 2 µg11 of benzene, 4 9 µg11 of ethylbenzene, and <br /> 3 1 pgll of MTBE Only MTBE was detected in MW-2 at 3 0 µg11 and in MW-3 at 1 5 µg/l The <br /> ' groundwater sample analytical results are summarized in Table 2, the distribution of gasoline <br /> compounds in groundwater is shown on Figure 5, and the laboratory reports are included in <br /> IAppendix B <br /> Between March 15, and June 21, 2006, gasoline compounds in groundwater generally declined in <br /> all three wells Concentrations of gasoline compounds in groundwater at MW-1 have generally <br /> declined, since the monitoring wells were installed in July 2002, probably due to source removal <br /> efforts and natural attenuation processes Since March 2004, concentrations of MTBE have been <br /> detected in the perimeter wells (MW-2 and MW-3) During the second quarter of 2006, the MTBE <br /> concentrations detected in all three wells were below the state of California Secondary Maximum <br /> ' Contaminant Level (MCL) of 5 µgll <br /> 23 Wastewater Disposal <br /> On April 10, 2006, Doulos Environmental, Inc transported approximately 15 gallons of <br /> groundwater, accumulated from sampling activities as non-hazardous waste, to InStrat, Inc in Rio <br /> Vista, California InStrat treated the wastewater with granular activated carbon and disposed of it <br /> according to their waste discharge permit A copy of the non-hazardous water transport form is <br /> included in Appendix B <br /> f <br /> • 8 <br />