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41) Sequoia 680 Chesapeake Dave 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 /> wo Analytical 819 Striker Avenue Suite 8 Saeramcmo,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-2033 /970519-1-12 <br /> 1880 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9705B57-01 Reported Jun 4, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> FAnaly <br /> alyte 2,4-Dinitro- Pentachloro- Pyrene <br /> toluene phenol <br /> ch# MS0528978270EXA MS0528978270EXA MS0528978270EXA <br /> hod EPA 8270 EPA 8270 EPA 8270 <br /> hod EPA 3510 EPA 3510 EPA 3510 <br /> Analyst B Pitamah B Pitarnah B Pitamah <br /> MS/MSD # 970588604 970568604 970588604 <br /> Sample Conc N D N D ND <br /> Prepared Date 5/28/97 5/28/97 5/28/97 <br /> Analyzed Date 5/28/97 5/28/97 5/28/97 <br /> Instrument 1 D # H5 H5 H5 <br /> Cone Spiked 200p9/L 2DOMg/L 2GOpg/L <br /> Result 142 132 121 <br /> 0M % Recovery 71 56 61 <br /> Dup Result 155 145 129 <br /> MSD % Recov 78 73 65 <br /> RPD 88 94 64 <br /> RPD Limit 0-30 0-30 0-30 <br /> LCS # WBO52897 WBO52897 WBO52897 <br /> Prepared Date 5/28/97 5/28/97 5/28/97 <br /> Analyzed Date 5/28/97 5/28/97 5/28/97 <br /> Instrument I D # HS H5 HS <br /> Cone. Spiked 200pg/L 200yg/L 200pg/L <br /> LCS Result 136 129 125 <br /> LCS % Recov - 68 65 63 <br /> LCS <br /> Control Limits 24-96 9-103 26-127 <br /> Please Note <br /> 1= UOIA ANALYTICAL The LCS is a control sample of known,interferent-free matrix that 1s analyzed using the same reagents, <br /> 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 K <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 /> 9Y <br /> e e ner **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> ject M r Page 3 of 3 <br /> 9705857 BLA <8> <br />