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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C95834 <br /> (916)922 1 9600 <br /> FAX(916)921 0100 <br /> aw Analytical www seguoialabs`om <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy CA <br /> 3017 Kilgore Road Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 12/12/00 10 59 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE in Air by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPP Limit Notes <br /> Batch 0120003- EPA 5030B(MeOH) <br /> Blank(0120003-BLKI) __ _ _ _ _Prepared&Analyzed 11/30/00 <br /> Purgeable Hydrocarbons ND 100 mg/m'Air <br /> Benzene ND 00500 " <br /> Toluene ND 00500 " <br /> Ethylbenzene ND 00500 " <br /> Xylenes(total) ND 00500 <br /> Methyl tert-butyl ether ND 0 500 <br /> Surrogate a a a-Trrfluorotoluene 1 72 200 860 60-140 <br /> L_CS(0120003-BSI) _ _Prepared&Analyzed 11/30/00 <br /> Benzenemm T 206 00500 mg/ml Air 200 103 70-130 <br /> Toluene 203 00500 200 101 70-130 <br /> 209 00500 200 104 70-130 <br /> #enerie <br /> rs(total) 621 00500 600 104 70-130 <br /> i <br /> Methyl Cert-butyl ether 1 97 0 500 2 00 985 70-130 <br /> Surrogate a a a-Triuorotoluene 169 200 845 60-140 <br /> Prepared ared&_A_nal zed 11/30/00 <br /> LCS Dup(0120003-BSDI) _ PY <br /> Benzene 2 15 0 0500 mg/ml Air 2 00 108 70-130 428 25 <br /> Toluene 209 0 0500 200 104 70-130 291 25 <br /> Ethylbenzene 2 16 0 0500 200 108 70-130 329 25 <br /> Xylenes(total) 645 0 0500 600 107 70-130 379 25 <br /> Methyl Cert-butyl ether 2 14 0 500 200 107 70-130 827 25 <br /> Surrogate a a a-Trifluorololuene 1 75 200 875 60-140 T <br /> uoia Analytical - Sacramento 1 h, rc❑rlis in this re port apply to the samples analyzed in accordance it Wr the charn of <br /> custody docunrtnt llus analytical report muss he reproduced in its entrretj <br /> Page 5 of 8 <br /> r�''� <br />