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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> D4 404 N.\X/igll Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> 111co Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> ...................... <br /> ........... <br /> Tracy <br /> Brown and aldwe a- m <br /> ra --n-it-6. the"n"t...Project ID: 'r"cO'' #2093, 'cy' <br /> ............................ ...... <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:;:' <br /> . ............. ...... ..... <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> GIC Batch#: GC032697 G0032697 GCO32697 GCO32697 <br /> 802004A 802004A 802004A 802004A <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 #: 7031533 7031533 7031533 7031533 <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-4 HP-4 HP-4 HP-4 <br /> Conc. Spiked: 20 pg/L 20pg/L 20,ug/L 60 pg/L <br /> Result: 18 17 17 53 <br /> IVIS % Recovery: 90 85 85 88 <br /> Dup. Result: 18 18 17 53 <br /> MSD %Recov.: 90 90 85 88 <br /> RPD: 0.0 5.7 0.0 010 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> .. .... ....... ................................. ........ <br /> . ............. <br /> . ...... .......................... ...... <br /> ......... ................. ............... ....... .......... ........... <br /> ............... <br /> ..... ..... ........ <br /> ...................... ...... <br /> LCS 4LCS032697 4LCS032597 4LCS032697 4LCS032697 <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-4 HP-4 HP-4 HP-4 <br /> Conc. Spiked: 20 pg/L 20pg/L 20 yg/L 60 Mg/L <br /> LCS Result: 16 16 16 49 <br /> LCS % Recov.: 80 so 80 82 <br /> MS/MSD <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 /> Ate recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> linterference,the LCS recovery is to be used to validate the batch. <br /> Melissa A. Brewer MS=Matrix Spike,MSD=MS Duplicate, RP0=9elative%Difference <br /> Client Services Representative <br /> 7031527,BRS <4> <br />