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(Z� Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> VIF Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> Blaine Tech Services, Inc Client Pr'olect ID -Chevron 19-8264 j 970521-H3 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9705C27-01 Reported Jun 9, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' Phenol 2 Chlorophenol 1,4-Dichloro- N Nitroso-Di- <br /> benzene N-propylamine <br /> QC Batch#- MS0528978270EYA MS0528978270EXA MS0528978270EXA MS0528978270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 6270 <br /> Prep Method EPA 3510 EPA 3510 EPA 3510 EPA 3510 <br /> Analyst B Pitamah B Pitamah B Pitamah B Pitamah <br /> MS/MSD # 970568604 970588604 970588604 970588604 <br /> Sample Conc • 12 N D N D ND <br /> Prepared Date- 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Analyzed Date- 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Instrument I D # H5 H5 H5 H5 <br /> Conc Spiked 200pg/L 200 pg/L 200ug/L 20opg/L <br /> Result 84 129 128 125 <br /> MS % Recovery 36 65 64 63 <br /> Dup Result 111 139 128 133 <br /> MSD % Recov 50 70 64 67 <br /> RPD 28 75 00 62 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> LCS#. WBO52897 W8052897 WBO52897 WBO52897 <br /> Prepared Date 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Analyzed Date: 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Instrument I D # H5 H5 H5 H5 <br /> Conc Spiked 200yg/L 200pg/L 200 pg/L 200Ng/L <br /> LCS Result 104 116 102 116 <br /> LCS % Recov. 52 58 51 58 <br /> LCS <br /> Control Limits 12-110 27-123 36-97 41-116 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> IA 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 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 /> eg y nner **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> ct Manager Page i of 3 97051027 BLA <7> <br />