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John Yoakum [EH] <br /> From: Costello, Timothy <Timothy.Costello@tetratech.com> <br /> Sent: Thursday,July 18, 2013 4:38 PM <br /> To: John Yoakum [EH] <br /> Cc: Greg Poncetta (greg@valleyoakpartners.com) <br /> Subject: RE: 2295 S Mac Arthur, investigation results <br /> Attachments: Figures.pdf,Tables.pdf,Appendix I Lab results - Groundwater Data.pdf; Appendix I Lab <br /> Results - Soil Boring Soils Data.pdf,Appendix I Lab Results - Soil Vapor Data.pdf,- <br /> Appendix <br /> ata.pdf;Appendix I Lab Results - Surface Soil Sample Data.pdf <br /> Johnny, <br /> Attached are the laboratory analytical data sheets for the sampling performed at the Thrasher property on S. MacArthur <br /> Drive in Tracy. <br /> Also attached are figures identifying the sample locations, and the data tables. <br /> No soil or groundwater impact was found. We did not find evidence of oil in the soil or groundwater from the adjacent <br /> release site. <br /> We collected soil vapor samples as well. Very few compounds were detected. Benzene was found in each of the three <br /> samples at concentrations above residential ESL values. However, no benzene was found in soil or groundwater <br /> samples. The benzene soil vapor concentrations were similar and therefore field contamination of some sort is a <br /> possibility. There is no on-site source. <br /> Feel free to reply with any questions. <br /> Thank you, <br /> Tim. <br /> From: John Yoakum [EH] [mailto:]Yoakum(a)sjcehd.com] <br /> Sent: Wednesday, July 17, 2013 2:31 PM <br /> To: Costello, Timothy <br /> Subject: RE: 2295 S Mac Arthur, investigation results <br /> Tim, <br /> That sounds good. <br /> Thanks for the quick reply. <br /> Johnny Yoakum <br /> Senior REHS <br /> San Joaquin County <br /> Environmental Health Department <br /> From: Costello,Timothy [mailto:Timothy.Costello(a)tetratech.com] <br /> Sent: Wednesday, July 17, 2013 2:21 PM <br /> 1 <br />