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404 N Wiget Lane <br /> Sequoia Walnut Creek,e�4� <br /> FAX(925)988-9673 <br /> Analytical "'"�" uo'�abs�m <br /> ttler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite 7 Project Number Chevron# 9-2033 Reported <br /> Dublin CA,94568 Project Manager De uma L Harding 12-Mar-01 07 45 <br /> Semivolatile 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 Lirnit Notes <br /> Batch 1B20010-EPA 3510B Sep Funnel <br /> Blank(1B20010-BLK2) Prepared 21-Feb-01 Analyzed 23-Feb-01 <br /> 1,4-Dichlorobenzene ND 10 ug/I <br /> 3,3-Dethlorobenzedme ND 10 " <br /> 2,4-Dechlorophenol ND so " <br /> Diethyl phthalate ND 50 " <br /> 2,4-Dimethylphenol ND 50 <br /> Dimethyl phthalate ND 50 <br /> 4,6-Dmrtro-2-methylphenol ND 10 <br /> 2,4-Duutropheno] ND 10 " <br /> 2,4-Duutrotoluene ND 10 " <br /> 2,6-Duutrotoluene ND 10 " <br /> Di n-octyl phthalate ND 10 " <br /> F)uoranthene ND 50 " <br /> eND 50 <br /> lorobenzene ND l0 <br /> Hexachlorobutadiene ND 10 " <br /> Hexachlorocyclopentadjene ND 10 " <br /> Hexachloroethane ND 50 " <br /> Indeno(1,2,3-cd)pyrene ND 10 " <br /> isophorone ND so " <br /> 2-Methylnaphthalene ND 50 " <br /> 2-Methylphenol ND 30 " <br /> 4-Methylphenol ND 50 <br /> Naphthalene ND so " <br /> 2-Nrtroamlme ND 10 " <br /> 3-Nitroatulme ND 10 " <br /> 4-Nitroarulme ND 20 " <br /> Nitrobenzene ND 50 <br /> 2-Nitrophenol ND so " <br /> 4-Nrtrophenol ND 10 " <br /> N-Nitrosodrmethylamme ND 50 " <br /> N-Nitrosodiphenylamure ND 50 " <br /> N-Nitrosode-n-propylartnne ND 50 <br /> Pentachlorophenol ND 10 " <br /> Phenanthrene ND 50 " <br /> Sequoia Analytical -Walnut Creek The results in tits report apply to the samples analyzed in accordance with the chain of <br /> custody document Ties analytical report must he reproduced in its entirety <br /> Page 18 of 25 <br />