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On April 1, 1999, under PHS/EHD observation, Fisch Environmental excavated approximately 100 <br /> cubic yards of soil from the vicinity of the former eastern canopy support structure and another <br /> ' 100 cubic yards from the vicinity of the former western canopy support structure Each of the <br /> excavations ultimately measured approximately 12 feet by 12 feet by 14 feet deep Once the <br /> ' excavation limits had been reached, Ramage Environmental collected two soil samples from each <br /> of the excavations Following excavation and soil sampling, the excavations were backfilled with <br /> approximately 200 cubic yards of soil from the UST excavation stockpile On April 21, 1999, <br /> ' Ramage Environmental transmitted to PHSIEHD the soil and 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 transported 512 cubic yards of remediated soil to the city police 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) The analytical results indicated that soil and groundwater had been impacted by <br /> gasoline compounds, including benzene and 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 (CPT), discrete <br /> ' groundwater sampling, installing four groundwater table monitoring wells, and sampling 12 <br /> domestic water wells Results of the investigation indicated that impacts to groundwater extend <br /> into deeper groundwater-bearing intervals, but that no nearby domestic wells had been impacted <br /> On July 22, 2002, Ramage Environmental published Status Report, Cone Penetration Testing and <br /> ' Quarterly Groundwater Monitonng, Second Quarter 2002 The report documented the results of <br /> CPT and discrete groundwater sampling and analysis at three additional locations, and the <br /> sampling of groundwater from the four nearest residential wells Based on the analytical results, <br /> ' the residential water supply does not appear to b impacted, and the extent of impacted <br /> groundwater appears to be mostly defined to the first groundwater interval beneath the site <br /> 4 <br />