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885 larvas Drive <br /> Sequoia °` °0)7'6-9" <br /> FAX(4e)782-6308 <br /> Analytical VVww sequoWabs com <br /> Blaine Tech Services(Shell) Project 2575 Country Club <br /> 1680 Rogers Avenue Project Number 2575 Country Club/Stockton Reported <br /> San Jose CA,95112 Project Manager Nick Sudano 08/14/00 17 58 <br /> MTBE Confirmation by EPA Method 8260A- Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch OH12001 -EPA 5030B IP/Tl <br /> Blank(OH12001-BLK1) _ Prepared&Analyzed 08/11/00 <br /> Methyl tent-butyl ether ND 1 00 ugrl <br /> Surrogate 12-Drchloroethane-d4 101 J 100 101 70-130 <br /> i <br /> LCS(OH12001-BS1) _ T _- _ Prepared&Analyzed 08/11/00 <br /> Methyl tert-butyl ether 109 1 00 ug/I 100 109 70-130 <br /> Surrogate 1 2-Drchloroethane-d4 109 100 109 70-130 <br /> Matrix Spike(OH12001-MS1) _ _ Source MJH0013-02 _Prepared_&Analyzed 08/11/00_ <br /> Methyl tert-butyl ether 104 1 00 ug/l too ND 104 70-130 <br /> Surrogate I 1-Drchloroethane-d4 ---- - T _v 106 - - - 100 106 - 70-130Ad&N - — <br /> eatnx Spike Dup(OH12001-MSDI) _ Source MJU0013-02 Prepared_&Analyzed 08/11_100__ <br /> thyl Cert-botyl ether __ 959 _ 1 00 _ ug/l 100 ND_ 959 70.130 810 25 <br /> Surrogate 1 2-Drchloroethane-d4 102 100 101 70-110 <br /> Batch OH14011 -EPA 5030B P/'ll <br /> Blank(OH14011-BLK1) _ _ _ ___ Prepared&Analyzed 08/12/00_ _ <br /> Methyl tert-butyl ether ND 1 00 ug/1 <br /> Surrogate 12-Drchloroethane-d4 830 100 83 0 70-130 mm <br /> LCS(OH 14011-BS 1) Prepared&Analyzed 08/12/00 <br /> Methyl tert-butyl ether 100 too ug/I 100 100 70-130 <br /> Surrogate 12-Drchloroethane-d4 975 100 975 70-130 <br /> Batch 01414030-EPA 5030B IP/T] <br /> Blank(OH14030-BLKI) Prepared&Analyzed 08/14/00 <br /> Methyl tert-butyl ether ND 100 ugll <br /> Surrogate 11-Drchloroethane-d4 821 100 821 70-130 <br /> Wequota Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 19 of 24 <br />