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= LABORATORIES, INC. <br /> Herst Associates Project: NCYC Reported: 03/03/2008 14:50 <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> Saint Charles, MO 63304 Project Manager: David Vasbinder <br /> Volatile Organic Anal (EPA Method 8260) <br /> Quality Control Repo - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent <br /> Constituent Batch ID QC Sample Type Sample ID Result Result Added Units RPD Recovery RPD Recoveg Lab Quals <br /> Benzene BRB1714 Matrix Spike 0802538-02 NO 24.680 25.000 ug1L 98.7 70-130 <br /> Matrix Spike Duplicate 0802538-02 NO 24.100 25.000 ug/L 2.4 96.4 20 70-130 <br /> ..._...._........._....._... ...__.._._...._.....__._...._........................_.._...----------- -- - --- --- ......_.......----------------------..._.. <br /> Bromodichloromethane BRB1714 Matrix Spike 0802538-02 NO 26.710 25.000 ug/L 107 70-130 <br /> Matrix Spike Duplicate 0802538-02 NO 26.300 25.000 ug/L 1.9 105 20 70-130 <br /> ...... __._..__.__ -----_ - ..__. ._.___.. ._.. --- --------- -- -- <br /> Chiorobenzene BRB1714 Matrix Spike 0802538-02 NO 26.520 25.000 ug/L 106 70-130 <br /> Matrix Spike Duplicate 0802538-02 NO 25.630 25.000 ug/L 2.9 103 20 70-130 <br /> _...-..._...... <br /> -_.......- <br /> Chloroethane BR81714 Matrix S ike 0802538-02 NO 26.050 25.000 ug/L 104 70-130 <br /> Matrix Spike Duplicate 0802538-02 NO 25.630 25.000 ug/L 1.0 103 20 70-130 <br /> 1,4-Dichlorobenzene BR81714 Matrix Spike 0802538-02 NO 27.420 25.000 ug/L 110 70-130 <br /> Matrix Spike Duplicate 0802538-02 NO 26.160 25.000 ug/L 4.7 105 20 70-130 <br /> - ..........._..- ----- -._.__._._..._...._..__...._..-----..----._...._ _.- <br /> 1,1-Dichioroethane BRB1714 Matrix Spike 0802538-02 NO 25.990 25.000 ug/L 104 70-130 <br /> Matrix Spike Duplicate0802538-02 NO 25.490 25.000 ug/L 1.9 102 20 70-130 <br /> - - ----- -- .._......._........_..._....------ ---- --- --..._......-- - .._........._._.................,.............. <br /> 1,1-Dichioroethene BRB1714 Matrix Spike 0802538-02 NO 25.700 25.000 ug/L 103 70-130 <br /> Matrix Spike Duplicate 0802538-02 NO 24.770 25.000 ug/L 3.9 99.1 20 70-130 <br /> Toluene BRB1714 Matrix Spike 0802538-02 NO 26.000 25.000 ug/L 104 70-130 <br /> Matrix Spike Duplicate 0802538-02 NO 25.460 25.000 ug/L 1.9 102 20 70-130 <br /> --.._....._.- --- _..._...._._,..------ -...._--------... -- <br /> Trichloroethene BRB1714 Matrix Spike 0802538-02 NO 24.570 25.000 ug/L 98.3 70-130 <br /> Matrix Spike Duplicate 0802538-02 NO 24.060 25.000 ug/L 2.2 96.2 20 70-130 <br /> 1,2-Dichioroethane-d4(Surrogate) BRB1714 Matrix Spike 0802538-02 NO 10.550 10.000 ug/L 106 76-114 <br /> Matrix Spike Duplicate 0802538-02 NO 10.350 10.000 ug/L 104 76-114 <br /> --._._._................. - - ....---- ------ <br /> Toluene-d8(Surrogate) BRB1714 Matrix Spike 0802538-02 NO 9.9200 10.000 ug/L 99.2 88-110 <br /> Matrix Spike Duplicate 0802538-02 NO 9.9000 10.000 ug/L 99.0 88-110 <br /> ------.- .. ...._.......- -- _..- -._.__ .-.. . ... -- .........-... _ ............._.._....----- ---------------.._.... -- - <br /> 4-Bromo6uorobenzene(Surrogate) BRB1714 Matrix Spike 0802538-02 NO 10.170 10.000 ug/L 102 86-115 <br /> Matrix Spike Duplicate 0802538-02 NO 10.070 10.000 ug/L 101 86- 115 <br /> --------------- <br /> BC Laboratories 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,Inc.assumes no responsibility for report alteration,separation; detachment or third party interpretation. Pape 30 of 35 <br /> 4100 Atlas Court-Bakersfield,CA 93308-(661)3274911 -FAX(661)327-1918-www.belabs.com <br />