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Sequoia <br />� Analytical <br />819 Striker Avenue Suite 8 <br />Sacramento CA 95834 <br />(916)921-9600 <br />FAX (916) 921-0100 <br />www sequoialabs com <br />SECOR International - Rancho Cordova Project Arco 4932 Stockton CA <br />3017 Kilgore Road, Suite 100 Project NumbLr N/A Reported <br />Rancho Cordova CA 95670 Project Manager Rusty Benkosky 03/21/01 17 27 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFT - Quality Control <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source %REC RPD <br />Anahle Result Limit Units Level Result %REC Limits RPD Limn Notes <br />Batch 1030178 - EPA 5030B (P/T) <br />Blank (1030178-BLK1) <br />Prepared & Analyzed 03/12/01 <br />PurgeablL Hydrocarbons <br />ND <br />500 <br />ug/l <br />Benzene <br />ND <br />0 500 <br />Toluene <br />ND <br />0 500 <br />Ethylbenzene <br />ND <br />0 500 <br />Xylenes (tote]) <br />ND <br />0 500 <br />Methyl ten -butyl ether <br />ND <br />2 50 <br />" <br />Surrogate a a a-Trti luorotoluene <br />716 <br />100 <br />716 <br />60-140 <br />I <br />LCS (1030178 -BSI) <br />- <br />Prepared & Analyzed <br />03/12/0I <br />Benzene <br />100 <br />0 500 <br />ug/l <br />100 <br />100 <br />70-130 <br />Toluene <br />103 <br />0 500 <br />l0 0 <br />103 <br />70-130 <br />Ethylbenzene <br />105 <br />0 500 <br />100 <br />105 <br />70-130 <br />nes (total) <br />325 <br />0 500 <br />300 <br />108 <br />70-130 <br />yl tert-butyl ether <br />9 29 <br />2 50 <br />100 <br />92 9 <br />70-130 <br />Surrogate aaa-Trifluorwoluene <br />8 00 <br />100 <br />800 <br />60-140 <br />Matrix Spike (1030178 -MSI) _ _ _ <br />Source <br />S103122-02 <br />Prepared & Analyzed 03/12/01 <br />Benzene <br />991 <br />0 500 <br />ug/I <br />100 ND <br />99 1 <br />60-140 <br />Toluene <br />101 <br />0 500 <br />too ND <br />101 <br />60-140 <br />Ethylbenzene <br />105 <br />0 500 <br />too ND <br />105 <br />60-140 <br />Xylenes (total) <br />322 <br />0 500 <br />300 ND <br />107 <br />60-140 <br />Methyl tert-butyl ether <br />9 09 <br />2 50 <br />_ <br />l0 0 ND <br />- — <br />909 <br />60-140 <br />Surrogate a a a-Trruorololuene - --- <br />-- 797 <br />"-- <br />IOD <br />79 7 <br />60 140 <br />Aiatrix Spike Dup (1030178-MSDI) <br />Source <br />S103122_02 <br />Prepared & Analyzed- <br />03/12/01 <br />Benzene <br />100 <br />0 500 <br />ug/1 <br />100 ND <br />100 <br />60-140 <br />0 904 25 <br />Toluene <br />10 2 <br />0 500 <br />too ND <br />102 <br />60-140 <br />0 985 25 <br />Lihylbenzene <br />105 <br />0.500 <br />100 ND <br />105 <br />60 140 <br />0 2�, <br />\,lenes (total) <br />326 <br />0 500 <br />300 ND <br />109 <br />60-140 <br />1 23 25 <br />Methyl tert-butyl ether <br />934 <br />--- <br />2 50 <br />- <br />too ND <br />93 4 <br />60-140 <br />2 71 25 <br />Surrogate a a a Trac luorololuene <br />789 <br />100 <br />78 9 <br />60-140 <br />Sequoia Analytical - Sacramento Tire results rn this reporl apply to the samples analyzed in accordance ii rth the chain of <br />0 custody document Thrs analytical report must be reproduced in its entirety <br />Page 8 of 12 <br />411� <br />