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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (9z5)988-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequoialabs coin <br /> s <br /> oy F Wetiton-Vallejo Project San Joaquin HSA <br /> P O Bo\2135 Project Number San JoaquinIISA Reported <br /> Vallejo CA,94592 Project Manager Scott Lookmgbill 26-May-00 19 37 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> .itch OE23002- EPA 5030B [PIT] <br /> lank(OE23002-BLKI) Prepared&Analyzed 23-May-00 <br /> Purgeable Hydrocarbons ND 50 ugfl <br /> nzene ND 050 <br /> luene ND 050 <br /> Ethylbenzene ND 050 " <br /> lylenes(total) ND 050 <br /> rrogaie a a a-Trrfluorotoluene 280 300 933 70-130 <br /> LCS (OE23002-BSI) Prepared&Analyzed 23-May-00 <br /> zene 162 0 50 ug/l 20 0 910 70-130 <br /> tnuene <br /> 17 4 050 20 0 870 70-130 <br /> Ethvibenzene 183 0 50 200 915 70-130 <br /> ELAM(total) 545 050 600 908 70-130 <br /> rrogale a a,a-Trrfiuorotoluene 290 300 967 70-130 <br /> atrix Spike(OE23002-MSI) Source W005314-05 Prepared&Analyzed 23-May-00 <br /> tnzene 166 050 ugll 200 ND 830 70-130 <br /> uene 177 050 200 ND 88 5 70-130 <br /> ylbenzene 18 7 0 50 20 0 ND 93 5 70-130 <br /> fh0 <br /> lenes(total) 55 6 050 600 ND 927 70-130 <br /> Surrogate a a a-Trifluororoluene 288 300 960 70-130 <br /> ffatrix Spike Dup (OE23002-MSD1) Source W005314-05 Prepared&Analyzed 23-May-00 <br /> nz4ne 16 6 0 50 ug/l 200 ND 83 0 70-130 0 20 <br /> Toluene 177 050 200 ND 88 5 70-130 0 20 <br /> ylbenzene 18 6 0 50 20 0 ND 93 0 70-130 0 536 20 <br /> h0 <br /> lenes(total) 554 050 600 ND 923 70-130 0 360 20 <br /> Surrogate a a a-Tr+i luorotoluene 28 7 300 95 7 70-130 <br /> 1 <br /> 1 <br /> SNWa Analytical - Walnut Creek The results in this report apply to the samples analyed rn accordance with the chain of <br />' custody document This analytical report inust be reproduced in its enurety <br /> Page 9 of 11 <br />