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Sequoia. 885 Jarvis Dr <br /> Mcrgan Hill,CA 95037 <br /> Analytical (408)776-9600 <br /> PAX(408)782-6308 <br /> vnv�v,se gaoiaiabs.c�n <br /> tratus Environmental Inc. Project: ARCO P5469,Stockton,CA <br /> 330 Cameron Park Jar. Suite MLL0441 <br /> 550 Project Number. ARCO#5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson <br /> 01/07/03 12:15 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 80155 modified -Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> I.ArialyteReporting Spike Source %REC RPD <br /> Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2L21003-EPA 5030B [PIT] <br /> Matrix Spike(2L21003-MSI) Source:MLL0369-02 Prepared&Analyzed: 12/21/02 <br /> Surrogate:a,a,a-Triiluorotoluene 8.24 ug/1 10.0 824 55-142 <br /> Matrix Spike Du (2L21003-MSD1) Source:MLL0369-02 Prepared&Analyzed: 12/21/02 <br /> Gasoline Range Organics(C6-C10) 426 50 ug/l 550 NO 77.5 62-134 5.03 41 <br /> Surrogate.-a,a,n-Trifluorotoluene 7,68 1 10.0 76.8 55-141 <br /> Batch 2L24003 -EPA 5030B [P/Tl <br /> Blank(2L24003-BLKI) Prepared&Analyzed: 12/24/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l <br /> rogate:a,a,a-Trifluorotoluene 8.82 10.0 88.2 55-142 <br /> Laboratory Control Sample(2L24003-BS2) Prepared&Analyzed: I2124/Q2 <br /> Gasoline Range Organics(C6-C10) 234 50 ug/l 250 93.6 62-134 <br /> Surrogate:a,a,a-Trifluorotoluene 10.3 10.0 103 55-142 <br /> Matrix Spike(2L24003-MSI) Source:MLL0550-05 Pre ared&Analyzed: 12/24/02 <br /> Gasoline Range Organics(C6-C10) 461 50 ug/l 550 ND 83.8 62-134 <br /> Surrogate:a,a,a-T)ifluorotoluene 8.46 10.0 84.6 55-142 <br /> Matrix Spike Dn (2L24003-MSD1) Source:MLL0550-05 Prepared&Analyzed: 12/24/02 <br /> Gasoline Range Organics(C6-C10) 446 50 ug/1 550 ND 81.1 62-134 3.31 41 <br /> Sur rogare:a,a,a-Trit7uorotoluene 10.1 10.0 101 55-142 <br /> Batch 2L27003 -EPA 5030B [P/T] <br /> Blank(2L27003-BLKI) Prepared&Analyzed: 12/27/02 <br /> Gasoline Range Organics(C6-C10) A'D 50 ugll <br /> Surrogate:a,a,a-Trifluorotoluene 9.95 " 10.0 99.5 55-142 <br /> oia Analytical-Morgan)-Till The results in this report apply to the san¢ples analyzed in accordance with the <br /> custody document. Unless otherwise stated,results are re orted on a wet chain of <br /> This analytical report must be reproduced in its entirety. weight weight basis. <br /> Page 13 of 20 <br />