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PSI--Oakland Project Interra Development <br /> 4703 Tidewater Ave Ste B Project Number: 865-86002 Reported: <br /> Oakland CA,94601 Project Manager: Frank Poss 01/30/08 13:51 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> SunStar Laboratories,Inc. <br /> ' Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 8012902-EPA 5030 GCMS <br /> Blank(8012902-BLKl) Prepared:01/29/08 Analyzed:01/30/08 <br /> m,p-Xylene ND 1.0 up/I <br /> o-Xylene ND 0.50 " <br /> Tert-amyl methyl ether ND 2.0 " <br /> Tert-butyl alcohol ND 10 <br /> Di-isopropyl ether ND 2.0 <br /> Ethyl tert-butyl ether ND 2.0 " <br /> Methyl tert-butyl ether ND 1.0 " <br /> LCS(8012902-BS1) Prepared:01/29/08 Analyzed:01/30/08 <br /> Surrogate:4-Bromofluombemene 7.96 lig/7 8.00 99.5 77.1-110 <br /> Surrogate:Dibromofluoromethane 7.79 " 8.00 97.4 66.3411 <br /> Surrogate:Toluene-d8 8.58 8.00 107 90.9-105 S-GC <br /> Chlorobemeene 20.2 1.0 20.0 101 75-125 <br /> IJ-Dichloroethene 18.8 1.0 20.0 93.8 75-125 <br /> ' Trichloroethene 21.0 1.0 " 20.0 105 75-125 <br /> Benzene 19.8 0.50 20.0 99.1 75-125 <br /> Toluene 20.4 0.50 20.0 102 75-125 <br /> LCSDup(8012902-BSD1) " Prepared:01/29/08 Analyzed:01/30/08 <br /> Surrogate:4-Bromoffuorobenzene 7.84 119/1 8.00 98.0 77.1-1/0 <br /> Surrogate:Dibromofluoromethane 7.75 8.00 96.9 66.3-111 <br /> Surrogate:Toluene-d8 8.46 8.00 106 90.9-105 S-GC <br /> ' Chlorobemmne 20.2 1.0 20.0 101 75-125 0.346 20 <br /> l,l-Dichloroethene 21.2 1.0 20.0 106 75-125 12.4 20 <br /> Trichloroethene 22.3 1.0 20.0 112 75-125 6.18 20 <br /> Benzene 20.4 0.50 20.0 102 75-125 2.98 20 <br /> Toluene 70.8 0.50 20.0 104 75-125 1.99 20 <br /> SunStar Laboratories,Inc. 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 entirely. <br /> Albert Vargas For John Shepler,Laboratory Director Page 23 of 24 <br />