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I` <br /> 6$0 Chesapeake Drive Rtdwood City,ca 94063 {415} 364.9600 FAX{4i5) 364.9233 <br /> Sequoia <br /> e 4���� 1 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988.9673 <br /> - 819 Striker Avenue,Suite 8 Sacramento,CA 95834 {916) 921.9600 FAX{916)921.0100 <br /> Analytical <br /> i <br /> x <br /> ........ <br /> Brawn and Caldwell ($acramento} Client Project ID Arco ITracy <br /> 9616 Micron Ave., Ste. 600 Matrix: Liquid <br /> Sacramento, CA 95827 <br /> Attention: Steve Misner QC Sample Group: 7031527-537, Reported: Mar 28, 1997;:1 <br /> 0 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GC032697 GC032697 GCO32697 GCO32697 <br /> 802002A 802002A 802002A 802002A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 6020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 ' <br /> Analyst: D.Newcomb D.Newcomb D.Newcomb i'D, Newcomb <br /> MS/MSD#: 7031539 7031539 7031539 7031539 <br /> Sample Cone.: N.D. N.D. N.D. 4 N.D. <br /> Prepared Date: 3/26/97 3/26/97 3/26/97 I 3/26/97 <br /> Analyzed Date: 3/26/97 3/26/97 3/26/97 3/26/97 ; <br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2 <br /> Conc. Spiked: 20 ug/L 20 pg/L 20 fug/L 60ug/L <br /> i <br /> Result: 18 20 19 56 <br /> MS % Recovery: 90 100 95 93 <br /> Dug. Result: 17 20 18 56 <br /> MSD % Recov.: 85 100 90 93 <br /> RPD: 5.7 0.0 5.4 0.0 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> LCS #: 2LCS032697 2LCS032697 2LCS032697 2LCS032697 <br /> Prepared Date: 3/26/97 3/26/97 3/26/97 3/26/97 <br /> Analyzed Date: 3/26/97 3/26/97 3/26/97 3/26/97 <br /> Instrument I.D.#: HP-2 HP-2 HP-2 ; HP-2 <br /> Cone. Spiked: 20yg/L 20,ug/L 20pg/L 60ug/L <br /> LCS Result: 17 20 18 55 i <br /> LCS %Recov.: 85 100 90 92 <br /> LCS 70.130 70.130 70-130 70-130 <br /> Control Limits <br /> Quality Assurance Statement: All standard operating procedures and;Equality control requirements have been met. <br /> Please Note: <br /> The LCS is a control sample of known interferent-tree matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL, #1271 preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> /] fortified with known quantities of uwbspecific'icompounds and subjected to the entire analytical procedure. If <br /> { - C/\. e recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recove is to be used to validate the batch. <br /> Melissa A. Brewer **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Client Services Representative <br /> A 7031527.BRS <6> <br /> - 1 <br />