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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-%W <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> Stratus Environmental Project Arco 2130,Stockton,CA <br /> 3330 Cameron Park Drive,Ste 550 Project Number 2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 09/18/02 17 43 <br /> i <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Umts level Result %LEC Limits RPD Limit Notes <br /> I <br /> Batch 2090178-EPA 5030B(PIT) <br /> Blank(2090178-BLK1) Prepared&Analyzed 09/16/02 <br /> Purgeable Hydrocarbons ND 50 ugA <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 <br /> i <br /> Etbylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 <br /> Surrogate a a a-TriJluorotoluene 927 100 93 60-140 <br /> LCS(2090178-BSI) Prepared&Analyzed 09/16/02 <br /> Benzene 904 050 ugfl 100 90 70-130 <br /> Toluene 9 84 050 100 98 70-130 <br /> Ethylhenzene 9 88 050 100 99 70-130 <br /> Akes(total) 302 050 300 101 70-130 <br /> gale a a a-Trifluorotoluene 913 100 91 60-140 <br /> I <br /> Matrix Spike(2090178-MS1) Source 5209177-01 Prepared&Analyzed 09/16/02 <br /> i <br /> Benzene 901 0 50 ug/l 100 ND 90 60-140 <br /> Toluene 9 63 0 50 100 ND 96 60-140 <br /> Ethylbenzene 9 74 0 50 100 ND 97 60-140 <br /> Xylenes(total) 299 0 50 300 ND 100 60-140 <br /> Surrogate a a a-Trifluorololuene 914 100 91 60-140 <br /> Matrix Spike Dup(2090178-MSD]) Source 5209177-01 Prepared&Analyzed 09/16/02 <br /> Benzene 9 00 0 50 ugll 100 ND 90 60-140 01 25 <br /> Toluene 9 67 0 50 100 ND 97 60-140 0 4 25 <br /> Etbylbenzene 973 050 100 ND 97 60-140 01 25 <br /> Xylenes(total) 299 0 50 300 ND 100 60-140 0 25 <br /> Surrogate a a a Trruorotoluene 9 00 100 90 60-140 <br /> I <br /> I <br /> ota Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Thu analytical report must be reproduced rn its entirety <br /> Oa Page 7 of 9 <br />