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TestAmeriea <br />THE LEADER IN ENVIRONMENTAL TESTING <br />11 <br />17461 Derian Avenue. Suite 100, Irvine, CA 92614 (949) 261-1022 Fax:(949) 260-3297 <br />LABORATORY REPORT <br />Prepared For: Terracon-Irvine Project: Brake Rotor Shavings <br />16662 Millikan Ave 80117000 <br />Irvine, CA 92606 <br />Attention: Pearl Pereira Sampled: 12/01/11 <br />Received: 12/02/11 <br />Issued: 01 / 11/ 12 16:41 <br />NELAP #01108CA California ELAP#2706 CSDLAC #10256 AZ #AZ0671 NV #CA01531 <br />The results listed within this Laboratory Report pertain only to the samples tested in the laboratory. The analyses contained in this report <br />were performed in accordance with the applicable certifications as noted. All soil samples are reported on a wet weight basis unless <br />otherwise noted in the report. This Laboratory Report is confidential and is intended for the sole use of TestAmerica and its client. This <br />report shall not be reproduced, except in f ll, without written permission from TestAmerica. The Chain of Custody, I page, is included and <br />is an integral part of this report. <br />This entire report was reviewed and approved for release. <br />SAMPLE CROSS REFERENCE <br />ADDITIONAL <br />INFORMATION: 1/11/12. This report was amended to include Chromium VI results for samples ARD -1 and SUNR-1 <br />additionally requested by the client. Please note that pH and Redox Potential (Eh) tests were not performed <br />along with Cr+6. According to the alkaline digestion method performed as part of hexavalent chromium <br />determination in soil samples, if matrix spike recoveries are below 75% of the expected concentration, the <br />sample matrix may be of a reducing nature (i.e. Cr+6 is converted to Cr+3). Generally, the reducing nature <br />is confirmed to be a matrix characteristic and not a laboratory spiking error, by evaluating the pH and Redox <br />Potential (Eh) values. However, due to an equipment failure, the laboratory was not able to measure Redox <br />Potential (Eh) potential. The sample matrix spike recoveries for this matrix were below 75% and a reducing <br />nature of the matrix is considered confirmed by the fact that the associated LCS in the batch was within <br />control limits. (In other words, there was no systematic spiking error.) <br />This report was amended to include additionally requested Chromium-TCLP test for samples ARD -1 and <br />SUNR-I and confirmation run for Selenium-STLC by EPA method 6020 for all samples <br />LABORATORVID <br />IUL0171-01 <br />IUL0171-02 <br />IUL0171-03 <br />IUL0171-04 <br />Reviewed By: <br />TestAmerica Irvine <br />Lena Davidkova <br />Project Manager <br />CLIENT ID <br />MATRIX <br />PAC -1 <br />Soil <br />FLOR-1 <br />Soil <br />ARD -1 <br />Soil <br />SUNR-1 <br />Soil <br />IUL0171 <Page 1 of 20> <br />