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1 <br /> ERI 227903 R03 Former Unocal Service Station 5098,Stockton, California September 30, 1999 <br /> Please call Mr Glenn L Matteucci, ERI's project manager for this site, at(415) 382-5994 if you have <br /> questions regarding this report <br /> Sincerely, <br /> Environmental Resolutions, Inc <br /> Glenn L Matteucci <br /> Project Manager <br /> Mark S Docku <br /> R G 4412 <br /> C E G 1675 <br /> Attachments References <br /> Plate 1 Site Vicinity Map <br /> Plate 2 Map of Area <br /> Plate 3 Groundwater Flow Direction and Gradient Diagram <br /> Plate 4 TPHg Concentrations in Groundwater (Shallow Screened Zone) <br /> Plate 5 Benzene Concentrations in Groundwater (Shallow Screened Zone) <br /> Plate 6 TPHg Concentrations in Groundwater (Deep Screened Zone) <br /> Plate 7 Benzene Concentrations in Groundwater(Deep Screened Zone) <br /> Plate 8 TPHg Concentrations m Groundwater (Shallow/Deep Screened Zone) <br /> Plate 9 Benzene Concentrations in Groundwater (Shallow/Deep Screened <br /> Zone) <br /> Attachment A County Letter (Dated August 27, 1999) <br /> Attachment B Cumulative Groundwater Monitoring and Sampling Data <br /> (Gettler-Ryan, Inc , July 6, 1999) <br /> Attachment C Historical Laboratory Analysis Results of Soil and Borings and Well <br /> Locations - Unocal <br /> Attachment D Central Valley Regional Water Quality Control Board Letter <br /> (Dated August 25, 1989) <br /> Attachment E Boring Logs (ERI, July 30, 1999) <br /> Attachment F Results of Laboratory Analyses of Soil Samples (ERI, July 30, 1999) <br /> Attachment G Results of Laboratory Analyses of Grab Groundwater Samples <br /> (ERI, July 30, 1999) <br /> 9 <br />