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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma CA 94954 <br /> a— ) (707)Analytical FAX 792-0865 <br /> (707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 2186,Stockton,CA P412405 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number G09JZ-0164 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 0111 1105 10 44 <br /> Purgeable Hydrocarbons by EPA 8015B -Quality Control <br /> Sequoia Analytical -Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result °/dtEC Limits RPD Lama Notes <br /> Batch 4120569-EPA 5030B,waters/EPA 8015B-VOA <br /> Blank(4120569-BLK1) Prepared&Analyzed 12/30/04 <br /> Gasoline Range Organics(C4-C12) ND - 50 ugA <br /> Surrogate 4-Bromofluorobenzene 273 300 91 80-110 <br /> Laboratory Control Sample(4120569-BSI) Prepared&Analyzed 12/30/04 <br /> Gasoline Range Organics(C4-C12) 2880 50 ugA 2750 105 - 67-101 HL <br /> Surrogate 4-Bromofluorobenzene 305 „!a j 6�1 5 S� 300 I�yl d MI01 - 80-110 <br /> Matrix Spike(4120569-MS1) Soure P412423-0Prepared&Analyzed 12/30/04 <br /> Gasoline Range Organics(C4-C12) 2950' 50 ugA 2750 68 1105 67-101 HL <br /> Surrogate 4-Bromofluorobenzene 304 300 101 80-110 <br /> Matrix Spike Dup(4I20569-MSD1) Sour a P412423-0 Prepared&Analyzed 1 0104 <br /> Gasoline Range Organics(C4-C12) 28§0--__----'50 ugA 2750 68 103 67-101 2 20 HL <br /> urrogate 4-Bromofluorobenzene 301 " 300 100 80-110 <br /> Batch 5010041 -EPA 5030B,waters/EPA 80158-VOA <br /> Blank(5010041-BLKI) Prepared&Analyzed 01/04/05 <br /> Gasoline Range Organics(C4-C 12) ND 50 ugA <br /> Surrogate 4-Bromofluorobenzene 157 300 86 80-110 <br /> Laboratory Control Sample(5010041-BS1) Prepared&Analyzed 01/04/05 <br /> Gasoline Range Organics(C4-C12) 2600 50 ugA 2750 95 - 67-101 <br /> Surrogate 4-Bromofluorobenzene 303 300 101 — 80-110 <br /> Matrix Spike(501004I-MSl) Sourc P412401-04� Prepared 01/04/05 Analyzed 01/05/05 <br /> Gasoline Range Organics(C4-C12) 3600 50 ugIl 2750 ND 131 - 67-10I LM <br /> Surrogate 4-Bromofluorobenzene 300 300 100 80-110 <br /> ft, asp <br /> Sequoia Analytical-Petaluma. 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 /> This analytical report must be reproduced in its entirety <br /> Page 14 of 18 <br />