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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) 986 9600 FAX(510)988 9673 <br /> ,!q)- Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project 1D Chevron 9-2033 /961125-Al <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9611 H98-01 Reported Dec 11, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Phenol 2-Chlorophenol 1,4-Dichloro- N-Nitroso-Di- <br /> benzene N-propylamine <br /> QC Batch#- MS1202968270EXZ MS1202968270EXZ MS1202968270EXZ MS1202968270EXZ <br /> Analy Method: EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3520 EPA 3520 EPA 3520 EPA 3520 <br /> Analyst E Manuel E Manuel E Manuel E Manuel <br /> MS/MSD # 9611114901 9611H4901 9611H4901 9611H4901 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 12/2/96 12/2/96 12/2/96 12/2/96 <br /> Analyzed Date 12/6/96 12/6/96 12/6/96 12/6/96 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked 2001ig/L 200,ug/L 200pg/L 200}ig/L <br /> Result 174 157 153 169 <br /> MS % Recovery 87 79 77 85 <br /> • Dup Result 1a3 164 160 181 <br /> MSD % Recov 92 82 80 91 <br /> RPD 50 44 45 69 <br /> RPD Limit. 0-30 0-30 030 0-30 <br /> LCS #- CB120296 CB120296 CB120296 CB120296 <br /> Analyst B Pitamah B Pitamah B Pitamah B Pitamah <br /> Prepared Date 12/2/96 12/2/96 12/2/96 12/2/96 <br /> Analyzed Date 12/4/96 12/4/96 12/4/96 12/4/96 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked 200pg/L 200,ug/L 200 Ng/L 200 ug/L <br /> LCS Result 152 141 131 151 <br /> LCS % Recov 76 71 66 76 <br /> LCS <br /> Control Limits 12-110 27-123 3697 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 ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> Sonified w known quantities of specific compounds and subjected to the entire analytical procedure If <br /> recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Penner "•MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> P ject Manager Page i of 3 9611H98 BLA <7> <br />