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I C Analytical <br /> ..................0 E M 0 0 E . . . . ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ <br /> WO Gene Autry Rty <br /> ,.naheim,CA 92805 <br /> 714/978-0113 <br /> Lx: 714/978-9284 <br /> May 4 , 1995 <br /> Mr. Ronnie Almero <br /> CRC Environmental <br /> 17875 Von Karman, Suite 200 <br /> Irvine, CA 92714 <br /> Dear Mr. Almero: <br /> B C Analytical is pleased to provide you with an enhancement <br /> for laboratory reporting. Along with your analytical report, <br /> we have enclosed our Batch QC report for this order ( laboratory <br /> ID number 9504203 ) . This report presents the data for the <br /> quality control samples analyzed with your samples as <br /> described in our Quality Assurance Manual . The report consists <br /> of five parts . <br /> Definitions and Terms - a glossary for your use when <br /> interpreting the Batch QC reports . <br /> Laboratory Control Standards - a report of LCS results for <br /> each analysis, at a minimum of one LCS per batch. <br /> Matrix QC Precision - a report of duplicate and/or <br /> duplicate spike results, with the calculated relative <br /> percent difference. <br /> Matrix QC Accuracy - a summary of spike or average spike <br /> results, with the calculated percent recovery. <br /> Method Blanks - a summary of blank results for each <br /> analysis, reported at a minimum of one per batch, along <br /> with the corresponding reporting detection limit (RDL) . <br /> We trust you will find this information useful . We recognize <br /> that this explanation is brief and that you may need more <br /> detailed assistance in order to use the Batch QC reports . <br /> Please call your client services representative, the local QA <br /> coordinator, or me if you would like to discuss this report <br /> further or want to receive Batch QC information regularly with <br /> your analytical report. <br /> Very truly yours, <br /> Frederick W. Haley <br /> Laboratory Manager <br />