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885 Jarvis Dr <br /> Sequoia Mangan HiR,CA 95037 <br /> ` # (408)776.9600 <br /> Nn all i c a FAX(408)782-6308 <br /> www.sequoialabs.ccm <br /> Stratus Environmental Inc. Project: ARCO 95469,Stockton,CA MT L044] <br /> 330 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469,Stockton,CA Reported: <br /> Cameron Park CA,35682 Project Manager: Jay Johnson 01/07/03 12:15 <br /> Total Purgeable Hydrocarbons (C6-CID)by EPA 801.5E modified - Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RBC Limits RPD Limit Notes <br /> Batch ZL27003-EPA 5030B JP/T)_ ^^ <br /> Blank:(2L27003-BLKI) Prepared&Analyzed: 12127/02 <br /> Laboratory Control Sample(ZL27003-BS2) Prepared&Analyzed: 12/27/02 <br /> Gasoline Rangc Organics(C6-C10) 232 50 ug/1 250 92.8 62-134 <br /> Surrogate:a,a,a-Trfiuorotoluene 11.0 10.0 110 55-142 <br /> Matrix Spike(ZL27003-MSI) Source:MLL0588-03 Prepared&Analyzed: 12/27/02 <br /> Gasolinc Range Organics(C6-CIO) 471 50 ug/1 550 ND 95.6 62-134 <br /> Surrogate:a,a,a-Triuorotoluene 12.4 " 10.0 124 55-142 <br /> ,ALatrix Spike Dup(2L27003-MSD1) Source:MLL0588-03 Prepared&Analyzed: 12/27/02 ---- <br /> Wine Range Organics(C6-CI 0) 446 50 ugn 550 ND 81.1 62-134 5.45 41 <br /> Surrogate:a,a,a-Trifluorotoluene 12.0 10.0 120 55-142 <br /> Batch 2L31003 -EPA 5030B JPI'E} ^ <br /> Blank(2L31003-BL-K1 Prepared&Analyzed: 12/31/02 <br /> Gasolinc Rangc Organics(C6-C10) ND 50 ug/I <br /> Surrogate:a,a,a-Truoratoluene 8.50 10.0 85.0 55-142 <br /> Laboratorl Control Sample(21.31003-BS2) Prepared&Analyzed: 12/31/02 <br /> Gasolinc Range Organics(C6-C10) 221 50 ug/1 250 88.4 62-134 <br /> Surrogate:a,a,a-Trifluorotoluene 9.05 " 10.0 90.5 55-142 <br /> Matrix Spike(21.31003-MSI) Source:MLL0923-02 Prepared&Analyzed: 12/31/02 <br /> Gasoline Range Organics(C6-CI0) 472 50 ugA 554 M7 79.8 62-134 <br /> Surrogate:a,a,a-Trifluorotoluene 12.3 10.0 123 55-142 <br /> i <br /> I <br /> via Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document, Unless otherwise stated,results are reported on a wet weight basis <br /> 77iis analytical report must be reproduced in irs enfirety. <br /> Page 14 of 20 <br />