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1 <br />Laboratories Inc. <br />Environmental Testing Laboratory Since 1949 <br />Herst Associates Reported: 07/21/2010 16:44 <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 />QC Batch ID: BTG1160 <br />Used <br />client sample: <br />N <br />Benzene <br />MS <br />1009913-02 <br />0.27000 <br />23.000 <br />25.000 <br />ug/L <br />90.9 <br />70-130 <br />MSD <br />1009913-02 <br />0.27000 <br />24.020 <br />25.000 <br />ug/L <br />4.4 <br />95.0 <br />20 <br />70-130 <br />Bromodichloromethane <br />MS <br />1009913-02 <br />ND <br />21.250 <br />25.000 <br />ug/L <br />85.0 <br />70-130 <br />MSD <br />1009913-02 <br />ND <br />22.700 <br />25.000 <br />ug/L <br />6.6 <br />90.8 <br />20 <br />70-130 <br />Chlorobenzene <br />MS <br />1009913-02 <br />ND <br />20.860 <br />25.000 <br />ug/L <br />83.4 <br />70-130 <br />MSD <br />1009913-02 <br />ND <br />21.710 <br />25.000 <br />ug/L <br />4.0 <br />86.8 <br />20 <br />70-130 <br />Chloroethane <br />MS <br />1009913-02 <br />ND <br />23.690 <br />25.000 <br />ug/L <br />94.8 <br />70-130 <br />MSD <br />1009913-02 <br />ND <br />25.280 <br />25.000 <br />ug/L <br />6.5 <br />101 <br />20 <br />70-130 <br />1,4 -Dichlorobenzene <br />MS <br />1009913-02 <br />ND <br />21.720 <br />25.000 <br />ug/L <br />86.9 <br />70-130 <br />MSD <br />1009913-02 <br />ND <br />22.990 <br />25.000 <br />ug/L <br />5.7 <br />92.0 <br />20 <br />70-130 <br />1,1-Dichloroethane <br />MS <br />1009913-02 <br />25.950 <br />47.780 <br />25.000 <br />ug/L <br />87.3 <br />70-130 <br />MSD <br />1009913-02 <br />25.950 <br />48.810 <br />25.000 <br />ug/L <br />4.6 <br />91.4 <br />20 <br />70-130 <br />1,1-Dichloroethene <br />MS <br />1009913-02 <br />26.390 <br />50.980 <br />25.000 <br />ug/L <br />98.4 <br />70-130 <br />MSD <br />1009913-02 <br />26.390 <br />53.620 <br />25.000 <br />ug/L <br />10.2 <br />109 <br />20 <br />70-130 <br />Toluene <br />MS <br />MSD <br />1009913-02 <br />1009913-02 <br />ND <br />ND <br />21.020 <br />21.980 <br />25.000 <br />25.000 <br />ug/L <br />ug/L <br />4.5 <br />84.1 <br />87.9 <br />20 <br />70-130 <br />70-130 <br />Trichloroethene <br />MS <br />1009913-02 <br />38.800 <br />59.890 <br />25.000 <br />ug/L <br />84.4 <br />70-130 <br />MSD <br />1009913-02 <br />38.800 <br />60.390 <br />25.000 <br />ug/L <br />2.3 <br />86.4 <br />20 <br />70-130 <br />1,2-Dichloroethane-d4 (Surrogate) <br />MS <br />1009913-02 <br />ND <br />10.690 <br />10.000 <br />ug/L <br />107 <br />76-114 <br />MSD <br />1009913-02 <br />ND <br />10.960 <br />10.000 <br />ug/L <br />110 <br />76-114 <br />Toluene -d8 (Surrogate) <br />MS <br />1009913-02 <br />ND <br />10.200 <br />10.000 <br />ug/L <br />102 <br />88-110 <br />' <br />MSD <br />1009913-02 <br />ND <br />10.090 <br />10.000 <br />ug/L <br />101 <br />88-110 <br />4-Bromofluorobenzene (Surrogate) <br />MS <br />1009913-02 <br />ND <br />10.800 <br />10.000 <br />ug/L <br />108 <br />86-115 <br />MSD <br />1009913-02 <br />ND <br />10.840 <br />10.000 <br />ug/L <br />108 <br />86-115 <br />The results in this report <br />apply to the samples analyzed in accordance with the chain of custody <br />document. This analytical <br />report must be reproduced in its entirety. <br />All results listed in this report are <br />for the exclusive use of the submitting parry_ BC Laboratories, <br />4100 Atlas Court Bakersfield, CA 93308 <br />Inc. assumes no responsibility for report alteration, separation, detachment or third party <br />(661) 327-4911 FAX (661) 327-1918 www.bciabs.com <br />interpretation. <br />Page 28 <br />' <br />of 29 <br />