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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> -9600 <br /> 4 (925)988-960D <br /> FAX(925)988-9673 <br /> Analytical www sequoialabs com <br /> I4G,,:ttler Ryan, Inc -Dublin Project Chevron <br /> 7 Sierra Court Suite J Project Number Chevron#9-2033 Reported <br /> Dublin CA,94568 Protect Manager Deanna L Harding 04-Sep-01 11 14 <br /> Semlvolatile Organic Compounds by EPA Method 8270C - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch IH22007- EPA 3510B Sep Funnel <br /> Blank(IH22007-BLK2) Prepared 27-Aug-01 Analyzed 29-Aug-01 <br /> Phenol ND so ug/l <br /> Pyrene ND 50 " <br /> 1,2,4-Trichlorobenzenc ND 50 " <br /> 2,4,5-Trichlorophenol ND 10 " <br /> 2,4,6-Trichlorophenol ND 10 " <br /> Surrogate 2-Fluorophenol 699 150 466 21-110 <br /> Surrogate Phenol-d6 463 150 309 10-110 <br /> Surrogate Nitrobenzene-d5 771 100 771 35-114 <br /> Surrogate 2-Fluorobiphenyl 825 100 825 43-116 <br /> Surrogate 2 4 6-Tribromophenol 134 150 893 10-123 <br /> Surrogate p-Terphenyl-d14 111 100 111 33-141 <br />�(1H22007-BSI) Prepared 22-Aug-01 Analyzed 28-Aug-01 <br /> aphthene 869 so ugll 100 869 46-118 <br /> 4-Chloro-3-methylphenol 122 50 150 813 23-97 <br /> 2-Chlorophenol 107 50 150 713 27-123 <br /> 1,4-Dichlorobenzene 646 10 100 646 36-97 <br /> 2,4-Dinitrotoluene 813 10 100 St 3 24-96 <br /> 4-Nitrophenol 345 10 150 230 10-80 <br /> N-Nitrosodi-n-propylamine 101 50 100 101 41-116 <br /> Pentachlorophenol 994 10 150 663 9-103 <br /> Phenol 463 so 150 309 12-110 <br /> Pyrene 113 so 100 113 26-127 <br /> 1,2,4-Trichlorobenzene 732 so 100 732 39-98 <br /> Surrogate 2-Fluorophenol 708 150 472 21-110 <br /> Surrogate Phenold6 370 150 247 10-110 <br /> Surrogate Nilrobenzene-d5 850 100 850 35-114 <br /> Surrogate 1-Fluorobiphenyl 861 100 861 43-116 <br /> V <br /> Surrogate 2 4 6-Tribromophenol 161 150 107 10-123 <br /> Surrogate p-Terphenyl-dM 114 100 114 33-141 <br />�uola Analytical-Walnut Creek 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 22 of 26 <br />