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07/15/05 FRI 17:13 FAX Q008 July 15, 2005 Lab ID STK534793 it St. Michaelis Preschool Customer : 3-13411 Quality Control - Organic Constituent Method Date/10 Type Units Conc. QC Data DQO Note t DBCP 504.1 07/02/2005:A203 Blank ug/L ND c0.01 LCS ug1L 0.2949 98.5% 70.130 BS ug/L 0.2949 1 102% 70-130 BSD ug/L 0.2949 0.D% 70-130 435 F( BSRPD ug/L 0.30 50.0100 504.1 07106/2005:G F0:33 CV uglL 5.012 103% 70-130 CV ug/L 5.012 105% 70-130 F1t3•hihromoprupanc Surrogate 504.1', 0710212005:A203 k ug/L 0.5868 89.9% 70-130 ug/L 0.5868 87.076 70-130 uSIL 05868 66.5% 70-130 BSD ug/L 0.5968 1.5% 70-130 560 504.1 07/06/2005:0 02-CCV ug/L 9.975 87.7% 70-130 03-CCV ug/L 9.975 99.2%, 70.130 B74planatiof7s 435 Sample matrix may be affecting this analyre• Data was accepted based on the LCS or CCY recovery. 560 Surrogate percent recoveries not within the Accepranae Range (AP) due to suspcated matrix interferences. ![ "} Dnitiotts 131 13Jank : Method $fenlc - Prepared m verify that the prcparalion pmccss is not contributing contamination to the samples. LCS Laboratory Control Standard(Sample - Prepared to verify that the preparation process is not affecting aaalyu recovery. M5/MSD Matrix Spikes - A random sample is spiked with a known amount of aoaly[e. The recoveries are an indication a how 03at sampic matrix affects analyte recovery. Fit BS/BSD ; Blank Spikes - A blank is spiked with a known amount of analyte. It is prcparnd to verify that the preparation procosS is not affecting analyte recovery. CCB Continuing Calibration Blank - Analyzed to verify the instrumcnr baseline is within criteria. CCV ; Continuing Calibration Verification - Analyzed to verify the instrument calibration i% within criteria. ND Non-detect - Result was below the DQO listed for the analyte. DQO Data Quality Objective - This is the criteria against which the quality control data is compared. R F_: FSTIC534793: Quality Control Page 2 �` 07/15/2005 FRI 17:07 [TX/RX NU 67021 Q008