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Sequoia 680 Chesapeake Drive Redwood City;CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N. gt Lan, Walnut Creek,CA 94598 (510) 988-9600 FAX(510)989-9673 <br /> AAnalW <br /> nalytical 8 19 Striker Avenue,Suite 9 Sacramento,CA 95934 (9t6) 921-9600 FAX(916)921-0100 <br /> .......... ........ .................. <br /> ...........- <br /> .... - '.... (Sacramento) <br /> ........ . ............. . ... <br /> Brown and0 Caldwell (Sa " ment0 Ient Project IDArco#20..93,Tracy...... <br /> ........... <br /> 9616 Micron Ave., Ste. 600 Matrix: Liquid <br /> Sacramento, CA 95827 <br /> Attention: Steve Misner OC Sample Group: 7031527-537 Reported: Mar 28, 199T.'r <br /> ...............r!.;.L'.:'...... ...... .................. ... ...... <br /> ............ <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GCO32697 GCO32697 GCO32697 GCO32697 <br /> 802005A 602005A 802005A 802005A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: D.Newcomb D.Newcomb D.Newcomb D.Newcomb <br /> MS/MSD #: 7031435 7031435 7031435 7031435 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <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-5 HP-5 HP-5 HP-5 <br /> Conc. Spiked: 20 jug/L 20jug/L 20 pg/L 60 pg/L <br /> Result: 19 17 18 53 <br /> IVIS %Recovery: 95 85 90 88 <br /> Dup. Result: 19 17 18 53 <br /> MSD %Recov.: 95 85 90 88 <br /> RPD: 0.0 0.0 0.0 0.0 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> .................. ................ 7-7:�................................... ..... .... ..... ......... <br /> ........... <br /> ........... ............ ...... <br /> ................ <br /> .......... <br /> ............ ......... <br /> .......... <br /> LCS #: 5LCS032697 5LCS032697 5LCS032697 5LCS032697 <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-5 HP-5 HP-5 HP-5 <br /> Conc. Spiked: 20,ug/L 20,ug/L 20 pg/L 60 jug/L <br /> LCS Result: 20 18 19 54 <br /> LCS %Recov.: 100 90 95 90 <br /> MS/MSL) <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Quality Assurance Statement: All standard operating procedures and quality control requirements have been met, <br /> Please Note: <br /> The LCS is a control sample of known,interferent-free 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 specific compounds and subjected to the entire analytical procedure. If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch, <br /> Melissa A. Brewer M5-Matrix Spike,MSD=MS Duplicate,RPD-Relative%Difference <br /> Client Services Representative <br /> 7031527.BRS <3> <br />