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Sequoia 15511losC 9Road <br /> 4070 <br /> San Carlos CA 44070 <br /> 1�& (650)232-9600 <br /> Analytical <br /> FAX(650)232-9612 <br /> www sequoialabs com <br /> tler-Ryan/Geostrategles(Ij Project Unocal(4) <br /> 7 Sierra Court, Suite J Project Number Former Unocal#5098,Stockton Reported <br /> Fbt <br /> lin CA, 94568 Project Manager Deanna Harding 07/01/02 07 46 6 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %RBC RPD <br /> Analyte Result Limit Units Level Result %REC Lunits RPD Limit Notes <br /> teb 2060034-EPA 5030B [P/TJ <br /> Blank(2060034-BLK2) Prepared&Analyzed 06/24/02 <br /> opropyltoluene ND 20 ug/l <br /> thylcne chloride ND 50 <br /> 1. <br /> phthalene ND 5 0 „ <br /> n-Propylbenzene ND 2 0 " <br /> 1en-ND 20 " <br /> 1,2-Tetrachlorocthane ND 20 " <br /> 1,1,2,2-Tetrachloroethane ND 20 „ <br /> achloroethene ND 20 <br /> Ilene ND 20 <br /> 1,2,3-Trichlorobenzene ND 20 <br /> 1FT <br /> -Trichlorobenzene ND 2 0 " <br /> trichloroethane ND 2 0 " <br /> 11 <br /> 1, ND 20 „ <br /> Wro,,t.hone ND 2 0 <br /> romethane ND 5 0 <br /> hloropropane ND 2 0 „ <br /> 2 4-Trimethylbenzene ND 2 0 " <br /> Tnmethylbenzene ND 2 0 <br /> 1 chloride ND 2 0 " <br /> otal Xylenes ND 20 " <br /> logate 1,2-Dichloroethane-d4 107 100 107 76-114 <br /> ogate Toluene-d8 105 100 105 88-110 <br /> urrogate 4-BFB 926 100 928 86-115 <br /> (2060034-BSI) Prepared&Analyzed 06/21/02 <br /> lene 186 20 ug11 200 930 70-130 <br /> hlorobenzene 174 20 200 870 70-130 <br /> Iichloroethene 173 20 11 200 865 65-135 <br /> nc 175 20 200 875 70-130 <br /> richloroethene 198 20 200 990 70-130 <br /> gate 1 2-Dichloroethane-d4 106 100 106 76-114 <br /> ;awe Toluene-a8 954 100 954 88-110 <br /> irrogare 4-BFB 930 100 930 86-115 <br /> ola Analytical-San Carlos 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 93 of 103 <br />