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' 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(91 G)92 I <br /> Analytical www sequotalabs com coin <br /> ATC Associates Inc -Modesto Project Westree Properties/KIR <br /> 1 1 17 Lone Palm Ave, Ste B Prcjcct Number 54 62514 0001 Repoi ted <br /> i Modesto CA,95351 Project Manager Jeanne Hornsey 04/21/01 11 50 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br />' Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Unus Level Result %REC Limits RPD Limit Motes <br />' Batch 1040173- EPA 5030B (PIT) <br /> Blank(1040173-BLK1) Prepared&Analyzed 04/12/01 <br /> Purgeable Hydrocarbons ND 500 ug/l <br /> 1 Benzene ND 0 500 ,1 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 11 <br /> Methyl Cert-butyl ether ND 250 <br /> Surrogate a a a-Tri luorotoluene 940 100 94 0 60-140 <br /> LCS(1040173-BSI) Prepared&Analyzed 04/12/01 <br /> Benzene 952 0 500 ug/l too 95 2 70-130 <br /> Toluene 968 0 500 l0 0 968 70-130 <br /> sm lbenzene 9 80 0 500 100 98 0 70-130 <br /> nes(total) 300 0 500 300 100 70-130 <br /> Methyl tert-butyl ether 8 14 250 100 814 70-130 <br /> Surrogate a a a-Trifluorotoluene 9 80 100 980 60-140 <br /> Matrix Spike(1040173-MSI) Source S104130-05 Prepared&Analyzed 04/12/01 <br /> Benzene 909 0 500 ugA too 909 60-140 <br /> Toluene 921 0 500 10 0 92 1 60-140 <br /> Ethylbenzene 938 0 500 10 0 93 8 60-140 <br /> Xylenes(total) 288 0 500 300 960 60-140 <br />' Methyl tent-butyl ether 9 25 250 100 925 60-140 <br /> Surrogate a a a-Trti luorotoluene 106 100 106 60-140 <br /> Matrix Spike Dup(1040173-MSDI) Source S104130-05 Prepared&Analyzed 04/12/01 <br /> Benzene 930 0 500 ug/l t0 0 93 0 60-140 228 25 <br /> Toluene 947 0 500 l0 0 94 7 60-140 278 25 <br /> Ethylbenzene 9 61 0 500 10 0 96 l 60-140 242 25 <br /> Xylenes(total) 294 0 500 1' 300 98 0 60-140 206 25 <br /> Methyl tert butyl ether 9 01 2 A 10 0 90 1 60-140 263 25 <br /> Surrogate a a a-Tris luorotoluene 106 " 100 106 60-140 <br /> uota Analytical-Sacramento The results in this report apply to the samples analyzed in accordance wrth the thorn of <br />' custody document This analytical report must be reproduced in its enlirety <br /> Page 8 of 14 <br />