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1.0 INTRODUCTION <br /> On behalf of Rinehart Distributing, Inc , Ramage Environmental has prepared this Monrtonng Well <br /> Installation and Groundwater Monitoring Report, Second Quarter 2005 for submittal to the San <br /> Joaquin County Environmental Health Division (EHD) and Central Valley Regional Water Quality <br /> Control Board (RWQCB) The scope of work was completed according to Ramage <br /> Environmental's Work Plan, Additional Site Investigation dated October 22, 2004 EHD approved <br /> the work plan on November 9, 2004 (Appendix A) <br /> 1 1 Site Location and Description <br /> The site is currently an active Valero gasoline service station and convenience store located at <br /> 1001 E Yosemite Avenue in the city of Manteca (San Joaquin County), California (Figure 1) The <br /> property was formerly a Beacon service station, and originally, a RINO service station, which <br /> included three 10,000-gallon gasoline underground storage tanks (UST) in a common excavation <br /> on the east side of the site and two dispenser islands in the south-central part of the site (Figure <br /> 2) In 1999, new USTs were installed in the old UST excavation and new dispensers were <br /> constructed in approximately the same location as the old dispensers During the second quarter <br /> of 2004, an on-site domestic water well was taken out of service, and the site was connected to <br /> city water service <br /> 12 Previous Work <br /> 1 2 1 UST System Removal and Soil Sampling <br /> During January 1999, Herbst Engineering, Inc removed the three former USTs, two dispenser <br /> islands, and the old canopy structure and supports On January 28, 1999, under EHD <br /> observation, Ramage Environmental collected six soil samples from beneath the former USTs <br /> and six soil samples from beneath the former dispensers and canopy supports <br /> On February 23, 1999, Ramage Environmental transmitted to EHD the results of the soil and soil <br /> stockpile sampling and analysis Results indicated that the soil beneath the former USTs had not <br /> been impacted by gasoline compounds The sample collected from beneath the southwestern <br /> dispenser did contain 0 017 milligrams per kilogram (mg/kg) of methyl tertiary butyl ether (MTBE), <br /> and the sample collected at a depth of 8 feet beneath the western canopy support contained 350 <br /> mg/kg of Total Petroleum Hydrocarbons (TPH)-as-gasoline and 1 2 mg/kg of xylenes These <br /> analytical results are summarized in Table 1 <br /> • 5 <br /> i <br />