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Page 1 of 1 <br /> Garrett Backus [EH] <br /> From: Woodburne, Keith (Concord,CA-US) [kwoodburne@tresolutions.com] <br /> Sent: Wednesday, April 13, 2011 10:19 AM <br /> To: Garrett Backus [EH] <br /> Subject: Lab results from confirmation soil samples -CCT Lodi Ave spill response <br /> Attachments: J34462-1 UDS Level 2 Report Final Report.pdf <br /> Hello Garrett, <br /> Please see the attached lab report for the confirmation soil samples collected from the bottom of the <br /> excavation at the Lodi Ave spill response on Monday. Three confirmation soil samples (CS-1, CS-2 <br /> and CS-3) were collected along the base of the excavation and analyzed for diesel range organics. <br /> The composite sample results are from the stockpile and I will be sending them to the waste hauler to <br /> generate the profile for disposal. <br /> The lab report shows that two of those samples were very low to non-detect (CS-2 and CS-3). <br /> However, sample CS-1 contained diesel at a concentration of 20,000 mg/kg. It would appear we <br /> excavated deep enough over most of the excavation but still needed to go a little deeper on the western <br /> end of the excavation. CCT will have the bobcat and/or excavator onsite to load the stockpile into roll <br /> off bins, probably tomorrow. My plan would be to have them do some additional digging on the west <br /> end of the excavation where sample CS-1 was collected. I will take another confirmation sample at that <br /> location after we've done some additional excavation. <br /> I'll let you know when that work will be done, but we're hoping to be there tomorrow morning. This of <br /> course depends on the schedule for the waste hauler. <br /> Let me know if you have any questions. <br /> Regards, <br /> Keith <br /> Keith L. Woodburne P.G. <br /> Senior Project Manager <br /> ��TRC <br /> *44 <br /> 1590 Solano Way <br /> Concord, CA 94520 <br /> (925)688-2488 phone <br /> (925)260-1373 cell <br /> kwoodburne@tresolutions.com <br /> 4/13/2011 <br />