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° Sequoia 1455 McDowell Blvd,North Ste D <br /> Petaluma,CA 94954 <br /> z A (7077)792-1865 <br /> Analytical <br /> FAX(707)792-0342 <br /> www sequoialabs coni <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P306252 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number lntam-50293 geed. <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/27/03 17 13 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical -Petaluma <br /> Report-g <br /> Analyte Result Liniit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-12(P306252-10)Water Sampled 06111/0311 00 Received 06/12/0311-45 <br /> Gasoline Range Organics ND 50 ug/1 3 3060383 06/17/03 06/17/03 EPA <br /> Benzene ND 050 „ „ ^ " " 8015B/8021B <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate 2,a,a-Tnfluoroto1uene 99% 65-135 ^ ^ ^ <br /> Surrogate 4-Bromojluorobenzene 98% 65-135 ^ » <br /> MS-1A306252- <br /> (P 11)Water Sampled 06/1]103 08 00 Received 06/12/03 11-45 <br /> Gasohne Range Organics 110 50 ug/l 1 3060544 06/23/03 06/23/03 EPA <br /> Benzene 16 050 „ ~ " " " 8015E/8021B <br /> Toluene 6 4 0 50 <br /> Ethylbenzene 16 050 <br /> Aftenes(total) 10 050'Wr <br /> ogate a a a-Tnfluorotoluene 99% 65-135 <br /> Surrogate 4 Bromofluorobenzene 99% 65-135 ^ ^ <br /> MS-1B(P306252-12)Water Sampled 06/11/030731 Received 06/12/0311.45 <br /> Gasoline Range Organics 130 50 ug/1 1 3060544 06/23/03 06/23/03 EPA <br /> 8015B/8021 B <br /> Benzene 2.7 0 50 <br /> Toluene 16 0 50 ~ " " QR-04 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) 069 0 50 " ^ ^ ~ QR-04 <br /> Surrogate a,a,a-Tnfluorotoluene 100% 65-135 ^ ^ <br /> Surrogate 4-Bromofluorobenzene 98% 65-135 ^ ^ ^ <br /> oroia 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 ui its enhrety <br /> Page 6 of 27 <br />