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Sequoia <br />� Analytical <br />819 Straker Avenue Suite 8 <br />Sacramento CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />www sequoialabs corn <br />!;RCOR International - Rancho Cordova Project Arco 4932, Stockton CA <br />3017 Kilgore Road, Suite 100 Pro3eLt Number NIA Reported <br />Rancho Cordova CA, 95670 Project Manager Rust) 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 />.nalyte Result Limn Units 1 evet Result %REC Limits RPD I imit Note,, <br />Batch 1030105 - EPA 5030B (PIT) <br />762 <br />100 <br />Blank (1030105-BLh1) <br />60-140 <br />Prepared & Analyzed 03/13/01 <br />M_ atrt_x Spike (1030105 -.MS 1) _ <br />Purgeable, Hydrocarbons <br />ND <br />D0 0 <br />11&1 <br />Benzene <br />ND <br />0 X00 <br />10 0 <br />ND <br />Toluene <br />ND <br />0 100 <br />Toluene <br />Ethylbenzene <br />ND <br />0 X00 <br />ND <br />101 <br />Xylenes (total) <br />ND <br />0 500 <br />Ethylbenzene <br />103 <br />Methyl tent -butyl ether <br />ND <br />250 <br />103 <br />60-140 <br />Surrogate a a a-Triuorotoluene <br />788 <br />Xylenes (total) <br />100 788 <br />60-130 <br />L_C_S (10_3010_5_ -BSI)--- <br />— -- <br />ND <br />103 <br />Prepared & Analyzed 03/I3/01 <br />Benzene <br />928 <br />0 500 <br />u /l 100 92 8 <br />70-130 <br />Toluene <br />960 <br />0 500 <br />100 960 <br />70-130 <br />Ethylbenzene <br />976 <br />0 500 <br />100 976 <br />70-130 <br />*es (total) <br />294 <br />0 500 <br />300 980 <br />70-130 <br />yl Cert -butyl ether <br />901 <br />250 <br />10 0 90 1 <br />70-130 <br />Surrogate a a a-Trifluorotoluene <br />762 <br />100 <br />762 <br />60-140 <br />M_ atrt_x Spike (1030105 -.MS 1) _ <br />_ --Source 5103144-03 <br />Prepared & Analyzed 03/13/01 <br />_ <br />Benzene <br />9 81 <br />0 500 uQJ] <br />10 0 <br />ND <br />98 1 <br />60-140 <br />Toluene <br />10 1 <br />0 500 <br />too <br />ND <br />101 <br />60-140 <br />Ethylbenzene <br />103 <br />0 500 <br />100 <br />ND <br />103 <br />60-140 <br />Xylenes (total) <br />309 <br />0 300 <br />300 <br />ND <br />103 <br />60 140 <br />Methyl tert-butyl ether <br />841 <br />250 <br />10 0 <br />ND <br />84 1 <br />60-140 <br />Surrogate aaa Trifliiorotoluene <br />722 <br />100 <br />72 2 <br />60-140 <br />Matrix Spike Dup (1030105-MSD1) <br />Source <br />5103144-03 <br />Prepared K Analyzed 03/13/01 <br />Benzene <br />104 <br />0 500 ugh <br />10 0 <br />ND <br />104 <br />60-140 <br />5 84 <br />2) <br />Toluene <br />107 <br />0 )00 <br />100 <br />ND <br />107 <br />60-140 <br />5 77 <br />25 <br />Ethylbenzene <br />109 <br />0 X00 <br />100 <br />ND <br />109 <br />60-140 <br />566 <br />25 <br />Xylenes (total) <br />324 <br />0 500 <br />300 <br />ND <br />108 <br />60-140 <br />4 74 <br />2-) <br />Methyl tent butyl ether <br />102 <br />2 50 <br />100 <br />ND <br />102 <br />60-140 <br />19 2 <br />25 <br />Surrogate a a a Trivarotohrene <br />740 <br />MO <br />74 0 <br />60 140 <br />Sequoia Analytical - Sacramento <br />Is <br />7ht resells to this report apply to the samples analyzed in accordance with the charm of <br />custody docrunent This analytical report mast be reproduced in its entirety <br />Page 6 of 12 <br />