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Sequoia <br /> r 885 Jarvis Drive <br /> 41) J quO a Morgan Hdl CA 95037 <br /> (408)776 9600 <br /> Analytical www <br /> (408}782-6308 <br /> sequoialabs coin <br />' Hydro-Geo Consultants, Inc Project Hydro-Geo <br /> 2477 Porterfield Ct PrOJLCt Number 242N Sutter St Reported <br /> Mountain View CA,94040 Project Manager John O'Rourke 09/24/01 14 45 <br />' Total Purgeable Hydrocarbons (C6-C10) by DHS LUFT and BTEX and MTBE by 8015B - Quality Control <br /> Sequoia Analytical - Morgan. Hill <br />' Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />' Batch 1I19002-EPA 5030B ]PIT] <br /> Blank(1119002-BLKI) Prepared&Analyzed 09/19/01 <br /> Gasoline Range Organics(C6-C 10) ND 50 ug/1 <br />' Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br />' Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate aaa-Trtfluorotoluene 934 100 934 70-130 <br />' LCS(1I19002-BSI) Prepared&Analyzed 09/19/01 <br /> Benzene 10 2 050 ug/l 100 102 70-130 <br /> Toluene 982 050 100 98 2 70-130 <br /> 140ylbenzene 990 050 11 100 99 0 70-130 <br /> nes(total) 293 050 300 977 70-130 <br /> Surrogate a a a-Trifluorololuene 987 100 98 7 70-130 <br /> I LCS(1I19002-BS2)_ _ -- Prepared&Analyzed 09/19/01 <br /> Gasoline Range Organics(C6-C10) 232 _ _-- <br /> 50 ug/l 250 92 8 70-130 <br /> Surrogate a a a-Trifluorotoluene 9 75 11 100 975 70-130 <br />' Matrix Spike(1119002-MS1) Source MKI0284-03 Prepared&Analyzed 09/19/01 <br /> Benzene 11 3 050 ug/l 100 ND 113 60-140 <br /> Toluene 10 5 050 100 ND 105 60-140 <br /> IEthylbenzene 11 0 050 " 100 ND 110 60-140 <br /> Xylenes(total) 334 050 300 ND 111 60-140 <br /> Surrogate a" <br /> a-Trefluoiololuene 987 100 98 7 70-130 ^� <br /> Matrix Spike Du (111 9002-MSD 1) Source MKI0284-03 Prepared&Analyzed 09/19/01 <br /> Benzene 110 050 ug/l too ND 110 60-140 269 25 <br />' Toluene 105 050 '1 100 ND 105 60-140 Goo 25 <br /> Ethylbenzene 107 050 100 ND 107 60-140 276 25 <br /> Xylenes(total) 326 050 300 ND 109 60-140 242 25 <br /> Surrogate a a a-Trrfluorotoluene 961 100 961 70-130 <br /> uoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analyircal report must be reproduced to its entirety <br /> I <br /> Page Page 5 of 9 <br />