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819 Striker Avenue Suite 8 <br />1 <br />Sequoia Sacramento CA 95834 <br />(916)921-9600 <br />Analytical www <br />(916) 921 -0 100 <br />sequoialabs com <br />SECOR International - Rancho Cordova Project Arco 4932 Stockton CA <br />3017 Kilgore Road Suite 100 Project Number N/A Reported <br />Rancho Cordova CA 95670 Project Manager Rusty Benkosky 03/21/01 17 27 <br />Total Purgeable Hydrocarbons (C6-Cl2), BTEX and MTBE by DHS LUFT - Quality Control <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source %REC RPD <br />knahte Result Limit Units LLVeI Result %REC I [mils RPD Limn Notes <br />Batch 1030179 - EPA 5030B (P/T) <br />Blank(1030179-BLK_1) <br />PrcparLd & Analyzed 03/13/01 <br />Purgeable Hydrocarbons <br />ND <br />500 ug/1 <br />Benzene <br />ND <br />0 500 <br />Toluene <br />ND <br />0 500 <br />Ethylbenzene <br />ND <br />0 500 <br />Xylenes{total) <br />ND <br />0 X00 <br />Methyl tert-butyl ether <br />ND <br />2 �0 <br />Surrogate a a a-Tryluorololuene <br />807 <br />10 0 807 60-140 - <br />LCS (1030179 -BSI) <br />Benzene —---------- -- - <br />Toluene <br />Ethylb=ene <br />enes (total) <br />hyl tert-butyl ether <br />Surrogate a a a-Trtiluorotoluene <br />Matrix Spike (1030179 -MSI) <br />Benzene - <br />Toluene <br />Ethylbenzene <br />Xylenes (total) <br />Methyl tert-butyl ether <br />Surrogate a a a Trifluorotoluene <br />Matrix Spike Dup (1030179-NISD1) <br />Benzene <br />Toluene. <br />Eth) Ibcnzuu. <br />Xylenes (total) <br />Methyl tert-butyl ether <br />Surrogate a a a Trii luoratohrcne <br />S quota Analytical - Sacramento The resulls in this report apply to the samples anal) --ed in accordance with the chain of <br />0custodt. document This analytical report must be reproduced to its entirety <br />Page 9 of 12 <br />Prepared & Analyzed <br />03/13/01 <br />_ <br />100 <br />0 500 ugll <br />100 <br />100 <br />70-130 <br />101 <br />0 500 <br />100 <br />101 <br />70-130 <br />104 <br />0 500 <br />100 <br />104 <br />70-130 <br />31 4 <br />0 500 <br />300 <br />105 <br />70-130 <br />978 <br />2 D0 <br />100 <br />978 <br />70-130 <br />7 78 <br />100 <br />778 <br />60-140 -- <br />---. <br />Source <br />- - <br />S103141-13 <br />Prepared & Analyzed <br />— <br />03/13/01 <br />964 <br />0 500 ug/l <br />too ND <br />964 <br />60-140- <br />991 <br />0 500 <br />100 ND <br />991 <br />60-140 <br />103 <br />0 500 <br />100 ND <br />103 <br />60-140 <br />31 6 <br />0 500 <br />300 ND <br />105 <br />60-140 <br />11 6 <br />2 30 <br />loo ND <br />116 <br />60-140 <br />763 <br />100 <br />76 3 <br />60-140 <br />Source <br />5103141-13 <br />Prepared & Analyzed <br />03/13/_01 <br />103 <br />0 500 ug11 <br />100 ND <br />103 <br />60-140 <br />662 <br />2i <br />10 �, <br />0 X00 <br />100 ND <br />105 <br />60-140 <br />5 78 <br />2D <br />106 <br />0 500 <br />100 ND <br />106 <br />60-140 <br />287 <br />2D <br />33 1 <br />0 500 <br />30 1) ND <br />110 <br />60-140 <br />464 <br />2-� <br />109 <br />2 )0 <br />100 ND <br />109 <br />60-140 <br />622 <br />25 <br />791 <br />100 - <br />791 <br />60-140 <br />S quota Analytical - Sacramento The resulls in this report apply to the samples anal) --ed in accordance with the chain of <br />0custodt. document This analytical report must be reproduced to its entirety <br />Page 9 of 12 <br />