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Sequoia 404 N ,CA Lane , <br /> Walnut Creek,CA 94598 <br /> 6 (925)988-9600 <br /> 9-!D- Analytical <br /> FAX(925) 98$-9673 <br /> IT Corporation Project Sears <br /> 4005 Port Chicago Hwy Project Number Sears-Stockton Reported ' <br /> Concord CA,94520 Project Manager Dave Poley 24-Nov-99 15 23 <br /> Volatile Organic Compounds by EPA Method 8260A - Quality Control - <br /> Se uoia Analytical=Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Linut Units Level Result %REC Units RPD Lmut Notes <br /> Batch 9K10025 Prepared 09-Nov-99 Using EPA 5030B [MeOH] <br /> LCS(9K10025-BSI) ' <br /> I,1-Dichloroethene 2 51 010 mg/kg 2 SO 100 65-135 <br /> Benzene 248 0 10 250 992 70-130 <br /> Trichloroethene 261 0 10 250 104 70-130 <br /> Toluene 217 0 10 250 868 70-130 <br /> Chlorobenzene 268 0 10 2 50 107 70-130 <br /> Surrogate Drbromofluoromethane 230 250 92 0 50-150 ' <br /> Surrogate 12-Dichloroethane-d4 2 05 250 820 50-150 <br /> Surrogate Toluene-d8 250 250 100 50-150 ' <br /> Surrogate 4-Bromofluorobenzene 2 45 250 980 50-150 <br /> Matrix Spike(9K10025-MSI) _ Source W911089-01 <br /> Methyl tert-butyl ether 264 0 10 mg/kg 250 ND 106 60-140 <br /> 1,1-Dichloroethene 2 55 0 10 250 ND 102 60-140 <br /> I <br /> Benzene 3 14 010 250 ND 126 60-140 <br /> Trichloroethene 264 010 250 ND 106 60-140 ' <br /> Tolu "-` <br /> ene _260 010 -250--ND`� `-104 - -60-140 "`-"- A <br /> Chlorobenzene 230 0 10 250 ND 92 0 60-140 <br /> Surrogate-Drbromofluoromethane �3 33 -- 150 -- —13450-150 - - --- - —' <br /> Surrogate 12-Dichloroethane-_d4 3 95 250 158 50-150 S-03 <br /> Surrogate Dibromofluoromethane 335 250 134 50-150 <br /> Surrogate 11-Dechloroethane-d4 395 250 158 50-150 S-03 , <br /> Surrogate Toluene-d8 255 250 102 50-150 <br /> Surrogate 4-Bromofluorobenzene 300 150 120 50-150 <br /> Matrix Spike Dup (9K10025-MSD1) Source W911089-01 , <br /> Methyl tert-butyl ether 295 0 10 mg/kg 250 ND 118 60-140 11 1 25 <br /> I,1-Dichloroethene 269 0 10 2 50 ND 108 60-140 534 25 ' <br /> Benzene 3 27 0 10 250 ND 131 60-140 406 25 <br /> Trichloroethene 285 0 10 250 ND 114 60-140 765 25 <br /> Toluene 279 0 10 2 50 ND 111 60-140 669 25 <br /> Chlorobenzene 249 010 250 ND 99 6 60-140 793 25 <br /> w Currogate Dlhromofluoromethane 325 " 150 _ _ 130 _50-150 _ _ - _ <br /> Sequoia Analytical-Walnut Creek The results m this report apply to the samples analyzed r n accordance with the ch mn of <br /> custody document Thu analytical report must be reproduced in its entire <br /> imp e Sharma,Project Manner Page 32 of 46 <br />