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S e q-u o i a 819 Striker Avenue 5 8 <br /> Sacramento CA 95858 34 <br /> (916)921-96M <br /> FAX(916)921 <br /> ,*Iwo Analytical www sequoialabss co-010m0 <br /> Delta Environmental Consultants(Cameron Park) Project Arco 2130, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number 2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Steve Carter 01/02/02 12 24 <br /> BTEX by EPA Method 8260B -Quality Control <br /> Sequoia Analytical -Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1120289-EPA 5030B [P/TJ <br /> Blank(1120289-BLKI) Prepared&Analyzed 12/26/0I <br /> Benzene ND 10 ug/I <br /> Toluene ND 10 " <br /> Bthylbenzene ND 10 " <br /> Xylenes(total) ND 1 0 " <br /> Surrogate 12-DCA-d4 280 250 112 60-140 <br /> Surrogate Toluene-d8 246 250 984 60-140 <br /> Surrogate 4-BFB 247 250 988 60-140 <br /> LCS(1120289-BSI) Prepared&Analyzed I2/26/01 <br /> Benzene 23 0 1 0 ug/I 250 920 70-130 <br /> dflu ne 252 10 250 101 70-130 <br /> rrogate 12-DCA-d4 290 250 116 60-140 <br /> Surrogate Toluene-d8 238 1 250 952 60-140 <br /> Surrogate 4-BFB 243 11 250 .972 60-140 <br /> _Matrix Spike(1120289-MSI) Source 5112176-07 Prepared&Analyzed 12/26/01 <br /> Benzene 240 10 ug/l 25 0 ND %0 70-130 <br /> Toluene 259 10 250 ND 104 70-130 <br /> Surrogate 1,2-DCA44 289 250 116 60-140 <br /> Surrogate Toluene-d8 241 250 964 60-140 <br /> Surrogate 4-BFB 241 250 964 60-140 <br /> Matrix Spike Dup(1120289-MSDI) Source S112176-07 Prepared&Analyzed 12/26/01 <br /> Benzene 23 1 10 ug11 250 ND 924 70-130 3 82 25 <br /> Toluene 259 10 250 ND 104 70-130 000 25 <br /> Surrogate 1,2-DCA-d4 288 250 115 60-140 - <br /> Surrogate Toluene-d8 234 250 936 60 140 <br /> Surrogate 4-BFB 240 250 960 60-140 <br /> -quota Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page I0 of 13 <br />