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s <br /> 404 N Wiget Lane ' <br /> 1 Sequoia Walnut Creek CA 94598 <br /> (925)988 9600 <br /> FAX(925)988%73 ' <br /> realtical www sequoialabs com <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd,Ste 4100 Project Number Arco 4 4932,Stockton Reported ' <br /> Rancho Cordova CA 95670 Project Manager Rusty Benkosky 27-Jul-01 14 25 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek ' <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> 3atch IG19003 - EPA 5030B PIT <br /> .CS(1G19003-BS1) Prepared&Analyzed 19-Jul-01 <br /> lenzene - — - _174-- -- 050 - ugll - 200 870 70-130 <br /> foluene 183 050 200 91 5 70-130 <br /> _thylbenzene 192 050 200 960 70-130 <br /> +Cylenes(total) 569 050 600 948 70-130 <br /> surrogate a a a-Trifluorotoluene T J 298 300 993 70-130 <br /> 1,CS(1G 19003-BS2) Prepared&Analyzed 20-Jul-01 <br /> krizene - - �- — ---- 1 S 8 ----0 50 ugfl 200 940 70-130 <br /> foluene 196 050 200 980 70-130 <br /> vthylbenzene 204 050 200 102 70-130 <br /> (ylcnes(total) 61 1 050 600 102 70-130 <br /> 4urrogale a a a-Trifluorotoluene 296 300 987 70-130 <br /> LCS(lG19003-BS3) Prepared&Analyzed 24-Jul-01 <br /> Benzene 17 2 050 ugfl 200 860 70-130 <br /> foluene 18 0 050 200 900 70-130 <br /> lthylbenzene 18 8 0 50 " 200 94 0 70-130 <br /> Xylenes(total) 56 1 050 600 93 5 70-130 <br /> Surrogate aa-Trtfluorololuene 310 300 103 70-130 <br /> LCS(IG19003-BS4) Prepared&Analyzed 25-Jul-0I ' <br /> Benzene _ 179 050 ugll 200 895 70-130 <br /> Toluene 191 0 50 200 95 5 70-130 <br /> Ethylbenwrie 201 050 200 100 70-130 ' <br /> Xylenes(total) 612 050 600 102 70-130 <br /> Surrogate aaa-Tri luorotoluene 297 300 990 70-130 <br /> Matrix Spike(lG19003-MSI) Source W107263-02 Prepared 19-Jul-01 Analyzed 23-Jul-01� <br /> Benzene _ 17 6 0 50 �ug/l 200 ND 880 70430 <br /> Toluene 189 050 200 ND 945 70-130 <br /> Ethylbenzenc 191 050 200 ND 955 70-130 <br /> Xylenes(total) 579 050 60 0 ND 965 70-130 <br /> Surrogate aaa-Tr�uorotaluene 30 3 30 0 101 70-130 <br /> Sequoia Analytical- Walnut Creek The results in this report apply to rhe samples analyzed in accordance with the chain of ' <br /> custody document This analytical report must be reproduced in its entirety <br /> • <br /> Page 9 of 15 , <br /> t <br /> r�n <br />