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Sequoia 819 Straker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(916)921 <br /> NO Analytical www sequoiatabs lab5 C 00 <br /> gacom <br /> 0 <br /> Stratus Environmental Project Arco 2130,Stockton,CA Sampled 6/26100 <br /> 3330 Cameron Park Drive,Ste 550 Project Number N/A Received 6127/00 <br /> Cameron Park,CA 95682 Project Manager Jay Johnson Reported 7/13/00 <br /> +2 , y, N, ",�, Mr'=YD'S w <br /> x Volatile Organic Compound`s 6y EPA,Method 8260AIQuality3Contral * <br /> I Se uoia Anal tical-Walnut CreC r� P. '��,, -L.-"t -, - � ark v p�'+qtj° <br /> Yj. q.._w -y a -�,a....�, _ �.,� ti ,�d�,-tea. .-.t_.......—..-. a �- ,,.»..n-Ur- w. 'i-It--XI u md. a <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits _ % Limit % Notes* <br /> Batch 0G07018 Date Prepared 716/00 Extraction Method EPA 5030B [PITT <br /> Blank 0G07018-BLKI <br /> tort-Butyl alcohol 7/6/00 ND ug/l 100 <br /> Methyl tert-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 500 480 50-150 960 <br /> Surrogate 12-Dechloroethane-d4 500 430 50-150 860 <br /> Blank 0G07018-BLK2 <br /> tert-Butyl alcohol 7/7/00 ND ug/l 100 <br /> Methyl tert-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 <br /> yl tert-butyl ether ND 20 <br /> yl methyl ether ND 20 <br /> rrogate Dibromofluoromethane 500 520 50-150 104 <br /> Surrogate 1,2-Dtchloroethane-d4 500 470 50-150 940 <br /> LCS 0G07018-BSI <br /> Methyl tert-butyl ether 7/6/00 500 464 ug/l 70-130 928 <br /> Surrogate Debromofluoromethane 500 500 50-150 100 <br /> Surrogate 1 2-Dechloroethane-d4 500 450 50-150 900 <br /> LCS OG07018-BS2 <br /> Methyl tert-butyl ether 717/00 500 46 6 ug/1 70-130 932 <br /> Surrogate Dibromofluoromethane 500 520 50-150 104 <br /> Surrogate 1,2-Dechloroethane-d4 500 480 50-150 960 <br /> Matrix Spike OG07018-MS1 W007002-02 <br /> Methyl tert-butyl ether 7/6/00 500 ND 452 ug/l 60-150 904 <br /> Surrogate Dibromofluoromethane 500 480 50-150 960 <br /> Surrogate 12-Dichloroethane-d4 500 420 50-150 840 <br /> Matrix Spike Dup 0G07018-MSD1 W007002-02 <br /> Methyl tert-butyl ether 7/6100 500 ND 505 ug/l 60-150 101 25 111 <br /> Surrogate Dibromofluoromethane 500 490 50-150 980 <br /> Surrogate 1,2-Dechloroethane-d4 500 420 50-150 840 <br /> Batch 0G07019 Date Prepared 717100 Extraction Method EPA 5030B IP/Tl <br /> Blank 0G07019-BLKI <br /> t rt Butyl alcohol 7/7/00 ND ug/l 100 <br /> uoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 9of11 <br />