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Sequoia 885 Jarvis Dr <br /> Morgan Hill,CA 95037 <br /> Analytical (408)776-9600 <br /> FAX(408)782-6308 <br /> URS Corporation Project BP Heritage Site#11193,Stockton,CA ML10264 <br /> 500]2th Street,Suite ]00 Project Number $P Heritage Site#11193,Stockton,CA Reported <br /> Oakland CA,94607 Project Manager Vern Elarth 09/18/02 12 37 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified- Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> IAnalyte Result Lumt Units Level Result %REC Lirruts RPD Limit Notes <br /> Batch 2I12002-EPA 5030E PIT <br /> Blank(2712002-BLKI) Prepared&Analyzed 09/12/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/1 <br /> Surrogate a a a-Trifluorotoluene 129 100 129 70-130 <br /> Laboratory Control Sample 2112002-BS2 Prepared&Analyzed 09/12/02 <br /> Gasoline Range Organics(C6-CIO) 263 50 ug/l 250 105 70-130 <br /> Surrogate a a a-Trifluorotoluene 11 1 11 100 111 70-130 <br /> Matrix Spike 2112002-MS1 Source ML10264-02 Pre ared&Anal zed 09/12/02 <br /> Gasoline Range Organics(C6-C10) 531 50 ug/l 550 ND 96 5 60-140 <br /> rragate a a a-Tris luorotoluene 126 1100 126 70-130 <br /> Matrix Spike Du 2I12002-MSD1 Source MLI0264-02 Prepared&Anal zed 09/12/02 <br /> Gasoline Range Organics(C6-C10) 511 50 ug/l 550 ND 929 60-140 3 84 25 <br /> Surrogate a a a-Triuorotoluene 101 100 101 70-130 <br /> Batch 2112004-EPA 5030$[P/TI <br /> Blank 2I12004-BLKI Pre ared&Anal zed 09/12/02 <br /> Gasoline Range Organics(C6-C10) ND 50 119/1 <br /> Surrogate a a a-Trifluorololuene 125 100 125 70-130 <br /> Laboratory Control Sample 2112004-BSl Prepared&Analyzed 09/I2/02 <br /> Gasoline Range Organics(C6-CIO) 293 50 ug/l 250 117 70-130 <br /> Surrogate a a a-Trifluorotoluene 164 11 100 164 70-130 <br /> 5-02 <br /> Matrix Spike 2112004-MSI Source ML10264-09 Prepared&Analyzed 09/12/02 <br /> Gasoline Range Organics(C6-C10) 549 50 ug/l 550 ND 998 60-140 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 30 of 39 <br />