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' 404 N Wiget Lane <br /> Sequoia Walnut Creek598 <br /> (925)988-49600 <br /> FAX(925)988-9673 <br />' Analytical •vww sequolalabs corn <br /> Ray F Weston-Vallejo Project San Joaquin HSA <br /> Bldg 229 Walnut Ave, 1st Floor Project Number San Joaquui HSA Reported <br /> Vallejo CA,94592 Project Manager Scott Lookingbill 13-Dec-00 13 31 <br />' TVPH/BTEX/M/N by 8015BGRO/8021B - Quality Control <br /> Aspen Analytical <br /> Reporting Spike Source %REC RPD <br /> nalyte Result Limit Units Level Result %REC Lints RPD Lunit Notes <br /> Batch AK01305- EPA 5030B <br /> lank(AK01305-BLK1) Prepared&Analyzed 13-Nov-00 <br /> asohne ND 500 ugll <br /> Benzene ND 0 500 " <br /> toluene ND 0 500 <br /> thylbenzene ND 0 500 <br /> Xylenes(total) ND 150 " <br /> ethyl tent butyl ether ND 250 <br /> urrogale a a a-Tnfluorotoluene 193 200 965 48-126 <br /> CS(AK01305-BS1) Prepared&Analyzed 13-Nov-00 <br /> t-oline ND 500 ugll 0-200 <br /> enzene 19 8 0 500 200 990 74-112 <br /> iT*en 202 0500 200 101 76-112 <br /> ene 199 0500 200 995 81-118 <br /> otal) 220 1 50 200 110 75-124 <br /> Methyl terl butyl ether 19 4 250 200 970 55-162 <br /> to <br /> gafe a qa-Tri luorotoluene 186 200 930 48-126 <br /> trix Spike(AK01305-MSI) Source W011053-01 Prepared&Analyzed 13-Nov-00 <br /> enzene <br /> 195 0 500 ugll 200 ND 975 57-123 <br />(ohierie 198 0 500 200 ND 990 63-115 <br /> thylbenzene 193 0 500 200 ND 965 64-117 <br /> Xylenes(total) 220 150 200 ND 110 55-132 <br /> ethyl tent-butyl ether 196 250 200 917 52 2 21-169 <br /> 01;arrogate a a a-Tnfluorotolueue 184 200 920 48-126 <br /> atrix Spike Dup(AK01305-MSDI) Source W011053-01 Prepared&Analyzed 13-Nov-00 <br /> ernzene 21 1 0 500 ugll 200 ND 106 57-123 788 31 <br /> Toluene 212 0 500 200 ND 106 63-115 683 26 <br />( bylenzene 205 0500 200 ND 103 64-117 6 03 26 <br /> lenes(toial) 230 150 200 ND 115 55-132 444 31 <br /> thyl tert-butyl ether 221 230 200 9 17 647 21-169 120 54 <br />�urrogale a a a-Tnfluorotoluene 180 200 900 48-126 <br /> la Analytical -Walnut Creek The resrdts in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> 1 <br /> Page 5 of 6 <br />