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• Rehor, Mike lIU. From: Nutan Kabir <nutank@accutest.com> �� Sent: Tuesday,June 16,2015 5:30 PM To: Craig Retzbach Cc: markdysert@aol.com JUL 0 7 2015 Subject: RE:Accutest Job Number C35684 ENVIRONMENTAL ucA!Tw r P:Ph PTAAc41T. Hi Craig, Here is the response from our Lab Director- Sample C35684-1 was a thick, viscous, ink-based sample. Due to the nature of the sample, there were organic constituents that were co-extracted during sample preparation that prevented the sample from concentrating to the routine volume. This is common to waste characterization and is acceptable by the method. The b qualifier was added to indicate that the Reporting Limit(RL)was raised due to the dilution caused by the sample final volume. Outside of the raise in RL, there is no negative impact on data quality. Furthermore, the surrogate recovered low due to the interfering nature of the sample matrix, and this was noted in the c qualifier. Surrogate failures are also common for waste characterization due to difficult matrices. Samples may be diluted to remove matrix effect, however, a dilution could raise the RL too high for regulatory usage. The final qualifier noted with a J value indicates that the reported results are between the reporting limit(where accuracy and precision are established)and the MDL. The J value is an industry standard used to indicate that results are in the lowest detectable range of a method and are estimated due to the nature of accuracy and precision in that range. Please let us know if you have any questions. Thanks, Nutan Kabir I Project Manager ■ACCUTEST. West 12105 Lundy Ave 1 San Jose,CA 95131 Office (408)588-0200,ext 3508 1 Cell(650)390-4460 nutank accutest.com I www.accutest.com Accutest—'The National Testing Laboratory with Total Performance you can count on" Your opinion is important to us. PLEASE TAKE OUR BRIEF SURVEY...THANK YOU ! The survey can be found at the following link: https://www.surveymonkey.com/s/Accutest NOTICE:This message is intendedfor the use of the individual or entity to whom it is addressed and may contain information that is privileged,confidential,and exempt from disclosure under applicable law.If the readerof this message Is not the Intended recipient or the employee or agent responsible for delivering the message to the intended recipient,you are hereby notified that any dissemination,distribution,or copying of this message is strictly prohibited.If you have received this message in error,please notify iomesrlAoccutes[com of the error.