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c Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Reported: 06/09/2010 7:31 <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 Quaffs <br /> QC Batch ID: BTF0199 I Used client sample: N <br /> Benzene MS 1007217-02 ND 26.810 25.000 ug/L 107 70-130 <br /> MSD 1007217-02 ND 24.370 25.000 ug/L 9.5 97.5 20 70-130 <br /> ' Bromodichloromethane MS 1007217-02 ND 19.860 25.000 ug/L 79.4 70-130 <br /> MSD 1007217-02 ND 17.570 25.000 ug/L 12.2 70.3 20 70-130 <br /> ------ <br /> _ ---.._..-- _ ..�-__._..... <br /> Chlorobenzene MS 1007217-02 ND 27.910 25.000 ugiL 112 70-130 <br /> -J^ MSD 1007217-02 ND -24.260 25.000 - ug/L 14.0 97.0- 20 70-130 <br /> Chloroethane MS 1007217-02 ND 25.550 25.000 ug/L 102 70-130 <br /> MSD 1007217-02 ND 23.950 25.000 ug/L 6.5 95.8 20 70-130 <br /> 1,4-Dichlorobenzene MS 1007217-02 ND 28.920 25.000 ug/L 116 70-130 <br /> MSD 1007217-02 ND 24.800 25.000 ug/L 15.3 99.2 20 70-130 <br /> 1,1-Dichioroethane MS 1007217-02 ND 25.800 25.000 ug/L 103 70-130 <br /> MSD 1007217-02 ND 23.280 25.000 ug/L 10.3 93.1 20 711-130 <br /> 1,1-Dichloroethene MS 1007217-02 ND 30.040 25.000 ug/L 120 70-130 <br /> MSD 1007217-02 ND 27.600 25.000 ug/L 8.5 110 20 70-130 <br /> Toluene MS 1007217-02 ND 25.460 25.000 ug/L 102 70-130 <br /> MSD 1007217-02 ND 22.570 25.000 ug/L 12.0 90.3 20 70-130 <br /> Trichloroethene MS 1007217-02 ND 27.440 25.000 ug/L 110 70-130 <br /> MSD 1007217-02 ND 24.100 25.000 ug/L 13.0 96.4 20 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) MS 1007217-02 ND 10.590 10.000 ug/L 106 76-114 <br /> MSD 1007217-02 ND 10.530 90.000 ug/L 105 76-114 <br /> Toluene-d8(Surrogate) MS 1007217-02 ND 9.5500 10.000 ug/L 95.5 88-110 <br /> -- ___.____. MSD 1007217-02 ND -- 9.0700 -_10.000---- ug/L - �- 90.7 --88-110 - <br /> 4-Bromofluo robenzene(Surrogate) MS 1007217-02 ND 9.3500 10.000 ug/L 93.5 86-115 <br /> MSD 1007217-02 ND 9.3600 10.000 ug/L 93.6 86-115 <br /> QC Batch ID: BTF0238 Used client sample: Y-Descripbon: Indoor faucet DUP, 05/26/2010 09:32 <br /> Benzene MS 1007291-08 ND 24.150 25.000 ug/L 96.6 70-130 <br /> MSD 1007291-08 ND 26.480 25.000 ug/L 9.2 106 20 70-130 <br /> - --- - __ -- ---- ---- -- ----- _ -- - -- <br /> Bromodichloromethane MS 1007291-08 ND 18.640 25.000 ug/L 74.6 70-130 <br /> MSD 1007291-08 ND 22.940 25.000 ug/L 20.7 91.8 20 70-130 Q02 <br /> Chlorobenzene MS 1007291-08 ND 23.380 25.000 ug/L 93.5 70-130 <br /> MSD 1007291-08 ND 28.030 25.000 ug/L 18.1 112 20 70-130 <br /> Chloroethane MS 1007291-08 ND 22.100 25.000 ug/L 88.4 70-130 <br /> MSD 1007291-08 ND 25.950 25.000 ug/L 16.0 104 20 70-130 <br /> 1,4-Dichlorobenzene MS 1007291-08 ND 24.940 25.000 ug/L 99.8 70-130 <br /> MSD 1007291-08 ND 29.150 25.000 ug/L 15.6 117 20 70-130 <br /> 1,1-Dichloroethane MS 1007291-08 0.24000 23.810 25.000 ug/L 94.3 70-130 <br /> MSD 1007291-08 0.24000 26.670 25.000 ug/L 11.4 106 20 70-130 <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 For the exclusive use of the submitting party BC Laboratories,lim assumes no responsibility for report alteration separation,detachment or third parry interpretation <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bclabs.com Page 30 of 32 <br />