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Natalia Subbotnikova [EH] <br />From: <br />Sent: <br />To: <br />Cc: <br />Subject: <br />Robert McClellon [EH] <br />Wednesday, June 26, 2013 11:26 AM <br />'Michael Carroll' <br />Natalia Subbotnikova [EH] <br />RE: Please delay analyses from Corral Hollow Landfill soil <br />Mike, that is what is called the matrix. The soil would contain lead particles. The rocks <br />could have the lead particle on the surface of the rocks, but probably a very small <br />amount. I think, as much as anything, why they were excluding rocks is due to the sample <br />volume needed to conduct the test. Please keep in mind that the samples taken the other <br />day are not indicative of the whole pile. I did not view the whole pile just the limited <br />areas that were uncovered for the sampling. Provided that the samples come back clean, <br />then it will require additional evaluation of the pile. The samples represent the area <br />where they were taken from. Additional sampling may be required to accurately classify the <br />pile. Robert <br />-----Original Message ----- <br />From: Michael Carroll [mailto:mcarroll@sjgov.org] <br />Sent: Wednesday, June 26, 2013 9:53 AM <br />To: Robert McClellon [EH] <br />Subject: RE: Please delay analyses from Corral Hollow Landfill soil <br />Hi Robert <br />We want our sampler to follow the sampling protocol for the tests, whatever that is. My <br />question to PSC was whether the sampling technique used was according to protocol. I am <br />not sure I got a straight answer. <br />True, the rocks probably don't contain lead, but then neither does the sand, silt, clay <br />etc of the native soil. My thought was that the results are reported in ppm, parts lead <br />per million parts of the pile, which includes the sand, silt, clay, and the rocks. Or so <br />my thinking goes. <br />So I will make sure to forward the answer I get from PSC. <br />See you <br />Mike <br /><from remote> <br />From: Robert McClellon [EH] [RMcClellon@sjcehd.com] <br />Sent: Tuesday, June 25, 2013 3:51 PM <br />To: Michael Carroll; Kendrick, Frank (PSC) <br />Cc: Sage, Matt (PSC); Padilla, Mary; Joyesh Chandra; Natalia Subbotnikova [EH] <br />Subject: RE: Please delay analyses from Corral Hollow Landfill soil <br />Mike, the small rocks that were removed during the sampling are not going to skew the <br />numbers. The analysis process is not able to extract much if anything from the rocks. <br />The volume of the sample was critical. If the samples contained more rock than fines it <br />may require re -sampling. Robert <br />From: Michael Carroll [mailto:mcarroll@sjgov.org] <br />Sent: Tuesday, June 25, 2013 12:51 PM <br />To: Kendrick, Frank (PSC) <br />Cc: Sage, Matt (PSC); Padilla, Mary; Joyesh Chandra; Robert McClellon [EH] <br />Subject: Please delay analyses from Corral Hollow Landfill soil <br />Hi Frank, <br />I have not heard back from you regarding whether excluding pebbles from the sample at <br />Corral Hollow Landfill would skew the results. Until this is resolved, please hold off on <br />1 <br />