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�i <br /> . approximately 200 cubic yards of soil from the UST excavation stockpile On April 21, 1999, <br /> Ramage Environmental documented the excavations and transmitted to PHSIEHD the soil and <br /> soil stockpile sample results <br /> On June 7, 1999, the San Joaquin Valley Unified Air Pollution Control District approved the <br /> uncontrolled aeration of the waste soil generated by the canopy support over-excavation and UST <br /> excavation On October 14, 1999, after approximately four months of aeration, Ramage <br /> Environmental re-sampled the soil pile On November 22, 1999, PHSIEHD approved the transfer <br /> of the remediated soil to the City of Manteca Police Confidence Course On December 3, 1999, <br /> Bob Evans Trucking loaded and transported 512 cubic yards of remediated soil to the city police <br /> site <br /> On November 16, 1999, Ramage Environmental submitted to PHSIEHD Preliminary Investigation <br /> and Evaluation Report, documenting the results from drilling 11 on-site Geoprobe®soil borings <br /> (Figure 2) Results of the investigation indicated that the subsurface soil and groundwater had <br /> been impacted by elevated concentrations of gasoline hydrocarbons, including benzene and <br /> r methyl tertiary butyl ether (MTBE) <br /> On November 16, 2000, Ramage Environmental submitted to PHSIEHD Water Well Survey <br /> Addendum, documenting the location of 56 domestic water supply wells within the site vicinity, <br /> and the sampling and analysis of groundwater from 12 wells within 500 feet of the site <br /> On January 10, 2001, Ramage Environmental submitted to PHSIEHD Environmental Site <br /> Investigation Report, documenting the results from cone penetration testing, discrete groundwater <br /> sampling, installing four groundwater table monitoring wells, and sampling 12 domestic water <br /> wells Results of the investigation indicated that impacts to groundwater extend into deeper <br /> groundwater-bearing intervals, but that no nearby domestic wells had been impacted <br /> On September 26, 2001, Ramage Environmental submitted to PHSIEHD Work Plan, Additional <br /> Site Investigation, to further define the extent of impacted groundwater, expand the groundwater <br /> monitoring well network, and monitor nearby domestic water wells After receiving verbal <br /> comments from PHSIEHD, Ramage Environmental submitted a work plan addendum, dated <br /> January 21, 2002 On January 30, 2002, PHSIEHD approved the modified scope of work <br /> 4 <br />