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1 <br />_ tn� <br />ting Laboratory Since 1949 <br />Herst Associates Reported: 05/21/2010 12:25 <br />4630 South Highway 94 North Outer Road Project: NCYC <br />Saint Charles, MO 63304 Project Number: [none] <br />Project Manager: Erin Fanning <br />Volatile Organic Analysis (EPA Method 8260) <br />Quality Control Report - Precision & Accuracy <br />' Control Limits <br />Source Source Spike Percent Percent Lab <br />Constituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals <br />' <br />QC Batch ID: BTE0254 <br />Used client sample: <br />Y - Description: FB@ Well #1/ CYA #1, 04/27/2010 14:05 <br />Benzene <br />MS <br />1005786-02 <br />ND <br />26.770 <br />25.000 <br />ug/L <br />107 <br />70-130 <br />MSD <br />1005786-02 <br />ND <br />25.540 <br />25.000 <br />ug/L <br />4.7 <br />102 <br />20 <br />70-130 <br />' <br />Bromodichloromethane <br />MS <br />1005786-02 <br />ND <br />25.530 <br />25.000 <br />ug/L <br />102 <br />70-130 <br />MSD <br />1005786-02 <br />ND <br />24.080 <br />25.000 <br />ug/L <br />5.8 <br />96.3 <br />20 <br />70-130 <br />Chlorobenzene <br />MS <br />1005786-02 <br />ND <br />27.010 <br />25.000 <br />ug/L <br />108 <br />70-130 <br />' <br />MSD <br />1005786-02 <br />ND <br />24.830 <br />25.000 <br />ug/L <br />8.4 <br />99.3 <br />20 <br />70-130 <br />Chloroethane <br />MS <br />1005786-02 <br />ND <br />26.450 <br />25.000 <br />ug/L <br />106 <br />70-130 <br />MSD <br />1005786-02 <br />ND <br />25.880 <br />25.000 <br />ug/L <br />2.2 <br />104 <br />20 <br />70-130 <br />1,4 -Dichlorobenzene <br />MS <br />1005786-02 <br />ND <br />27.060 <br />25.000 <br />ug/L <br />108 <br />70-130 <br />MSD <br />1005786-02 <br />ND <br />24.670 <br />25.000 <br />ug/L <br />9.2 <br />98.7 <br />20 <br />70-130 <br />1,1-Dichloroethane <br />MS <br />1005786-02 <br />ND <br />24.830 <br />25.000 <br />ug/L <br />99.3 <br />70-130 <br />MSD <br />1005786-02 <br />ND <br />23.650 <br />25.000 <br />ug/L <br />4.9 <br />94.6 <br />20 <br />70-130 <br />1,1-Dichloroethene <br />MS <br />1005786-02 <br />ND <br />28.190 <br />25.000 <br />ug/L <br />113 <br />70- 130 <br />MSD <br />1005786-02 <br />ND <br />26.920 <br />25.000 <br />ug/L <br />4.6 <br />108 <br />20 <br />70-130 <br />Toluene <br />MS <br />1005786-02 <br />ND <br />26.280 <br />25.000 <br />ug/L <br />105 <br />70-130 <br />MSD <br />1005786-02 <br />ND <br />25.290 <br />25.000 <br />ug/L <br />3.8 <br />101 <br />20 <br />70-130 <br />Trichloroethene <br />MS <br />1005786-02 <br />ND <br />26.910 <br />25.000 <br />ug/L <br />108 <br />70-130 <br />MSD <br />1005786-02 <br />ND <br />25.510 <br />25.000 <br />ug/L <br />5.3 <br />102 <br />20 <br />70-130 <br />1,2-Dichloroethane-d4 (Surrogate) <br />MS <br />1005786-02 <br />ND <br />9.4900 <br />10.000 <br />ug/L <br />94.9 <br />76-114 <br />MSD <br />1005786-02 <br />ND <br />9.7100 <br />10.000 <br />ug/L <br />97.1 <br />76-114 <br />Toluene -d8 (Surrogate) <br />MS <br />1005786-02 <br />ND <br />9.8400 <br />10.000 <br />ug/L <br />98.4 <br />88-110 <br />' <br />MSD <br />1005786-02 <br />ND <br />10.030 <br />10.000 <br />ug/L <br />100 <br />88-110 <br />4-Bromofluorobenzene (Surrogate) <br />MS <br />1005786-02 <br />ND <br />9.9800 <br />10.000 <br />ug/L <br />99.8 <br />86-115 <br />MSD <br />1005786-02 <br />ND <br />9.9100 <br />10.000 <br />ug/L <br />99.1 <br />86-115 <br />The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. <br />All results listed in this report are <br />for the exclusive use of the submitting <br />party. BC Laboratories, <br />Inc. assumes <br />no responsibility for report <br />alteration, <br />separation, <br />detachment or third party interpretation. <br />' <br />4100 Atlas <br />Court Bakersfield, <br />CA 93308 <br />(661) 327-4911 FAX (661) 327-1918 <br />www.bclabs.com <br />Page 28 of 29 <br />