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08/22/0.1 WED 16:LU I-AX duo 0.40 4'14 July 19, 2001 Lab ID : STK133164 Robert Scheppmann Customer : 3-14374 Quality Control - Organic --TConstituent Method Date/ID Type Units Conc. QC Data DQO Note DBCP 504.1 07/10/2001:A203 Blank ug1L ND <0.01 LCS ug/L 0.2941 84,2% 70-130 BS ug/L 0.2941 89.9% 7D-130 BSD ug/L 0.2941 88.0% 70.130 BSRPD ug/L 2.096 s3D 99.6% 70-130 504,1 07/10/2001:A 02-CCV tiglL 5.000 03-CCV ugL 5.000 91.6% 70-130 1.3-Dibromapropane-Surrogate 504.1 07/1012001:A203 Blank ug/L 0.5847 85.390 70-130 LCS ug/L 0.5847 90.7% 70-130 BS ug/L 0.5947 91.9% 70-130 BSD ug/L 0.5847 92.9% 70-130 3% 70-130 504.1 07/10I2001:A 03-CCV ug� 9.940 99.940 06 % 70-130 504.1 07/10/2001:A203 Blank ug[L ND <0.02 EDB LCS ug/L 0.2941 94,6% 70.130 BS ug/L D.2941 98.6% 70-130 BSD ug/L 0.2941 98.2% 70-130 BSRPD ug/L 0.496 530 504.1 07/10/2001:A 02-CCV I ug/L 5.000 116% 70-130 03•CCV ug/L 5.000. 106% 7D-130 Definitions Blank Method 131ank - Prepared to verify that the preparation process is not conaibuting contarninatlon to the samples. LCS Laboratory Control Standard/Sample - prepared to verify dist tlic preparation process is not affecting analyte rCCOYery. MS/MSD : Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication o how that sample matrix affects analyte recovery. BS/BSD Blank Spikes - A blank is spiked with a known amount of analyte. It is prepared to verify that the preparation m process is not affecting analyte recovery• CCV Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. CCB Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. ND Nan-deteLi - Result was below the OQO listed for die analyte. 000 Data Quality Objective - This is the criteria against which the quality control data is compared. STK133164: Qualiry Control Page 2 �1^