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680 Chesapeake Dnve Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia 444 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> Analytical 819 5tnker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc A A Client Project ID Chevron 9-2033 j 970821-F3 n { <br /> 1680 Rogers Ave Matrix Liquid w <br /> -San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9708D46-01 Reported Sep 10, 19974, <br /> (QUALITY CONTROL DATA REPORT <br /> Analyte' 2,4-D.nitro- Pentachloro- Pyrene <br /> toluene phenol <br /> QC Batch# MS0827978270EXA MS0827978270EXA MS0827978270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 <br /> Prep. Method EPA 3510 EPA 3510 EPA 3510 <br /> Analyst: B Pitamah 8 Pitamah B Pitamah <br /> MS/MSD #: WBo82797 WB082797 WBO82797 <br /> Sample Cone : N D N D N D <br /> Prepared Date: 8/27/97 8/27/97 8/27/97 <br /> Analyzed Date: 8/27/97 8/27/97 8/27/97 <br /> Instrument I D # F4 F4 F4 <br /> Cone Spiked 200 jig/L 200pg/L 200ug/L <br /> Result 133 147 147 <br /> MS % Recovery- 67 74 74 <br /> Dup Result: 129 150 146 <br /> MSD % Recov : 65 75 73 <br /> RPD: 31 20 068 <br /> RPD Limit: 0-30 0-30 0-30 <br /> r k: <br /> LCS #: WBO82897 WBM897 WBO82897 <br /> Prepared Date. 8/28/97 8/28/97 8/26/97 <br /> Analyzed Date 8/29/97 8/29/97 8/29/97 <br /> Instrument I D #. F4 F4 F4 <br /> Cone Spiked 200ug/L 2Wlig/L 200ug/L <br /> LCS Result 144 162 178 <br /> LCS%Recov.: 72 81 89 <br /> LCS <br /> Control Limits 24-96 9-103 26-127 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SE I NALYTICAL preparation,and analytical methods employed for the samples The matnx spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure M <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 /> egg enner MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Manager Page 3 of 3 970BD46 BLA <9> <br />