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Sequoia 1551 irl ]Road <br /> San Carlos osCA <br /> 23 9609600 <br /> Analytical FAX(650)232 0 <br /> (650)232 9612 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategtes(1} Project Unocal(4) <br /> 6747 Sierra Court,Suite d Project Number Former Unocal#5098& Montgmery Ward Reported <br /> Dublin CA,94568 Pr4lect Manager Deanna Harding 03/26/02 12 44 ' <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2030017-EPA 5030B IP/Tl <br /> Blank(20300I7-BLK2) - Prepared&Analyzed 03/08/02 - <br /> p-)sopropyl toluene ND 2 0 ug/l <br /> Methylene chloride ND 50 " <br /> Naphthalene ND so " <br /> n-Propylbenzene ND 2 0 <br /> Styrene ND 2 0 <br /> 1,1,1,2-Tetrachloroethane ND 20 " <br /> 1,1,2,2-Tetrachloroethane ND 2 0 " <br /> Tetrachloroethene ND 20 " <br /> Toluene ND 2 0 " <br /> 1,2,3-Tnchlorobenzene ND 20 " <br /> 1,2,4-Tnchlorobenzene ND 2 0 " <br /> 1,1,1-Tn chloroethane ND 20 " <br /> 1,1,2-Tnchloroethane ND 2 0 <br /> Tnchloroethane ND 2 0 " <br /> Tnchlorofluoromethane ND 50 <br /> 1,2,3-Tnchloropropane ND 2 0 " <br /> 1,2,4-Tnmethylbenzene ND 2 0 <br /> 1,3,5-Tnmethylbenzene ND 2 0 " <br /> Vinyl chloride ND—2 0- " -T_- <br /> -- Total Xylenes ND- ----2 0_ --- — - — -- - -� <br /> Surrogate 12-Dichloi oethane-d4 926 100 926 63-118 <br /> Surrogate-Toluene-d8_- _ ___ -9 86 --- _ " - --100------ 986=-88-110— <br /> Surrogate 4-BFB 106 100 106 86-115 <br /> LCS(2030017-BS2) Prepared&Analyzed 03/08/02 <br /> -- Benzene - -d - - _ 18 7" --2 0— ug/1 `20 0'- 93 5 -70-130 <br /> Chlorobenzene 192 2 0 200 960 70-130 <br /> 1,1-Dichloroethene 16 9 2 0 200 84 5 65-135 <br /> Toluene 190 2 0 200 950 70-130 <br /> Tn6hloroethene 190 20 200 950 70-130 <br /> Surrogate 1 2-Dichloroethane-0 104 100 104 63-118 <br /> Surrogate Toluene-d8 992 100 992 88-110 <br /> Surrogate 4-BFB 108 100 108 86-115 <br /> - <br /> Sequoia Analytical - San Carlos The results in this repro r apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety ' <br /> Page 83 of 91 <br />