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JCU uvl�► 404 N Wiget Lane Walnut Creek CA 94Wd (9c5j vtva-vo.w <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)79Z 0342 <br /> ,..,. <br /> Gettl'e'r- n <br /> Ryan- C7ublin f """ Client project Id Unocal #2859, Stockton <br /> 674 Slerra Court, suite J Matrix Solid <br /> ion Haig pC:r Av 94568 <br /> 4568` 11 1 <br /> Repo,..rted. Apr 7, 1999;v rA ( <br /> ,r evork OC Sample Group 904-0008 <br /> V' <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes Lead <br /> Benzene <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 6010 <br /> Analyst C Westwater C Westwater C Westwater C Westwater J Kelly <br /> MS/MSD <br /> Batch# 9040280 9040280 9040280 9040280 9040096 <br /> Date Prepared. 4/6/99 4/6/99 4/6/99 4/6/99 4/2/99 <br /> Date Analyzed 4/6/99 4/6/99 4/6/99 4/6/99 4/5/99 <br /> Instrument l D #, HP-4 HP4 HP4 HP-4 MV-4 <br /> Conc Spiked 0 80 mg/kg 0 80 mg/kg 0 80 mg/kg 2 4 mg/kg 50 mg/k9 <br /> Matrix Spike <br /> % Recovery 93 79 85 92 86 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 90 78 81 92 86 <br /> Relative % <br /> Difference 27 1 6 45 0 0 00 <br /> LCS Batch#: 4LCSO40699 4LCSO40699 4LCSO40699 4LCSO40699 LCSO40299 <br /> Date Prepared. 4/6/99 4/6/99 4/6/99 4/6/99 4/2/99 <br /> Date Analyzed: 4/6/99 4/6/99 4/6/99 4/6/99 4/5/99 <br /> Instrument I.D.# HP-4 HP-4 HP-4 HP-4 MV-4 <br /> LCS % <br /> Recovery: 98 83 86 96 100 <br /> Recovery <br /> Control Limits 50-150 50-150 50-150 50-150 80-120 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL, #1271 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 R <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Interference,the LCS recove Is to be used to validate the batch <br /> ne Fegley <br /> Project Manager <br /> 9040008 GET <3> <br />