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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> ettler-Ryan Client Project ID UNOCAL #5421-Stockton Sampled Apr 21, 1998 <br /> 747 Sierra Court, Suite J Sample Descript Soil, OWS-4 Received Apr 21, 1998 <br /> Dublin, CA 94568 Analysis Method EPA 8270 Extracted Apr 28, 1998 <br /> Attention Clyde Galantine Lab Number 804-1420 Analyzed Apr 28, 1998 <br /> Reported May 6, 1998 <br /> QC Batch Number SP0428988270EXA <br /> Instrument ID MS-1 <br /> SEMI-VOLATILE ORGANICS by GC/MS (EPA 8270) <br /> Analyte Detection Limit Sample Results <br /> Ng/kg Ng/kg <br /> Hexachlorobenzene 100 N D <br /> Hexachlorobutadiene 100 N D <br /> Hexachlorocyclopentadiene 100 N D <br /> Hexachforoethane 100 N D <br /> Indeno(1,2,3-cd)pyre ne 100 N D <br /> Isophorone 100 N D <br /> 2-Methylnaphthalene 100 N D <br /> 2-Methylphenol 100 N D <br /> 4-Methylphenol 100 N D <br /> Naphthalene 100 N D <br /> 2-Nitroaniline 500 N D <br /> 3-Nitroaniline 500 N D <br /> 4-Nitroaniline 500 N D <br /> Witrobenzene 100 N D <br /> 2-Nitrophenol 100 N D <br /> 4-Nitrophenol 500 N D <br /> N-Nitrosodimethylamine 100 N D <br /> N-Nitrosodiphenylamme 100 N D <br /> N-Nitroso-di-N-propylamine 100 N D <br /> Pentachlorophenol 500 N D <br /> Phenanthrene 100 N D <br /> Phenol 100 N D <br /> Pyrene 100 N D <br /> 1,2,4-Trichlorobenzene 100 N D <br /> 2,4,5-Trichlorophenol 500 N D <br /> 2,4,6-Trichlorophenol 100 N D <br /> Surrogates Control Limit % % Recovery <br /> 2-Fluorophenol 25 121 53 <br /> Phenol-d6 24 113 62 <br /> Nitrobenzene-d5 23 120 61 <br /> 2-Fluorobiphenyl 30 115 70 <br /> 2,4,6-Tribromo'phenol 19 122 75 <br /> 4-Terphenyl-di 4 18 137 86 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> is <br /> Alan 8 Kemp <br /> Laboratory Director Page 2 of 2 <br /> 8041418 GET K6> <br />