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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Iwo <br /> } i <br /> Blaine Tech Servicses, Inc Client Project iD Chevron 9-2033 j 970821-F3 <br /> 1680 Rogers Ave Matrix Liquid V <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9708D46-01 Reported Sep 10, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' 1,2,4-Trichloro. 4-Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methyiphenol <br /> QC Batch#. MS0827978270EXXA MS0827978270EXA MS0827978270EXA MS0827978270EKA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method. EPA 3510 EPA 3510 EPA 3510 EPA 3510 <br /> Analyst. B Pitamah B Pitarnah B Pitamah B Pitamah <br /> MS/MSD #: W6082797 WBO82797 WBOB2797 WBOB2797 <br /> Sample Cone : N D N D N D N D <br /> Prepared Date: 8/27/97 8/27/97 8/27/97 8/27/97 <br /> Analyzed Date- 8/27/97 8/27/97 8/27/97 8/27/97 <br /> Instrument I D # F4 F4 F4 F4 <br /> Cone Spiked. 200ug/L 20apg/L 200 ug/L 200Ng/L <br /> Result 130 132 125 47 <br /> MS % Recovery. 65 66 63 24 <br /> iDup Result: 132 150 126 50 <br /> MSD % Recov : 66 75 53 25 <br /> RPD: 1 5 13 0 80 6 2 <br /> RPD Limit 0.30 0-30 0-30 0-30 <br /> LCS #: W13082897 WBO82897 WBO82897 WB082897 <br /> Prepared Date: 8/28/97 8/28/97 8/28/97 8/28/97 <br /> Analyzed Date: 8/29/97 8/29/97 8/29/97 8/29/97 <br /> Instrument I D.#: F4 F4 F4 F4 <br /> Cone Spiked. 200 pg/L 200 ug/L 200 pg/L 200 ug/L <br /> LCS Result: 144 148 138 52 <br /> LCS %Recov • 72 74 69 26 <br /> LCS <br /> Control Limits 39-98 23-97 46-118 10-80 <br /> Please Note <br /> The LCS is a control sample of known,interferent4ree matrix that is analyzed using the same reagents, <br /> 0 ZE11 ALYTICAL 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 H <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 /> tner **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Manager Page 2 of 3 9708D46 BLA <8> <br />