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1 2 2 Environmental Site Investigations <br /> On January 23, 1998, Ramage Environmental published Site Investigation Report, which <br /> documented the soil and groundwater sampling and analysis from 11 Geoprobe® soil borings <br /> The soil boring locations are shown on Figure 2 <br /> Field observation and analytical laboratory results indicated that diesel and gasoline _ <br /> hydrocarbons had impacted soil and groundwater beneath the site, the city of Tracy right-of-way <br /> (Hamilton Alley) and other private property parcels to the north and east of the site <br /> MOn January 27, 1999, Ramage Environmental published Monitoring Well Installation and <br /> Groundwater Sampling Report, which documented the installation of three groundwater table <br />' monitoring wells (MW-1, MW-2 and MW-3) Only the groundwater sample collected from MW-2, <br /> northeast (downgradient) of the former UST source area, contained only 140 micrograms per <br /> liter (L[g/l) of Total Petroleum Hydrocarbons (TPH)-as-diesel The well locations are shown on <br /> Figure 2, the well construction details and groundwater monitoring data are summarized in Table <br /> 1, and the groundwater analytical results are summarized in Table 2 <br /> On February 18, 1999, the three monitoring wells were re-sampled, and none of the petroleum <br /> hydrocarbon compounds analyzed were detected As a result, environmental corrective actions <br /> were discontinued at the site, but the case was never closed <br /> In January 2006, Ramage Environmental resumed quarterly groundwater monitoring, to re- <br /> evaluate groundwater conditions beneath the site, so that the case could be considered for <br /> regulatory closure <br /> r <br /> S <br /> 4 <br />