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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 + FAX (415) 364-9233 <br /> Yx`J.'.v..`-�}��drX•,.,.y\�t..w.7,a.r.� {.o->t {:-.fiSJ.f �.>.�va, eY. Y rMy ♦v} u >rnrv».+Y�r.+.a.�vr rf:.i\`.y.�,�`.b:•rAvyr.a�.,,.,�ti^Lfx,.Y.:"'.�i+wczs'�-c C ��} <br /> ;r <br /> W w <br /> 4Waterwork Client Project ID. W0388,, Reeves Exxon „ <br /> ' 1710 Main Street <br /> Escalon, CA 95320 <br /> }�Attentian Lois Frantz QC Sample Grau� 1123904, 3908,3910 Reported Jan 6, 1992 _ <br /> wa". ' �.W.trhYSi�MtrWiYia`].frAV+VkW}nv:�iv nx�in $4..R�fi.44R.<n�C S..v�e tii WeM\r nvJtiASCrf/Ifr hS1 Cv. � �uCv+`v <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> ' Analyst- A.Miraftab A.Miraftab A.Miraftab A.Miraftab <br /> Reporting Units mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed Dec 28, 1991 Dec 28, 1991 Dec 28, 1991 Dec 28, 1991 <br /> OC Sample# GBLK122791 GBLK122791 GBLK122791 GBLK122791 <br /> MS/MSD MS/MSD MS/MS0 MS/MSD <br /> Sample Conc: N D N D N D N D <br /> Spike Conc. <br /> Added: 020 020 020 060 <br /> Conc. Matrix <br /> Spike: 018 021 021 N 065 <br /> Matrix Spike <br /> % Recovery: 90 105 105 108 <br /> ' Conc Matrix <br /> Spike Dup.: 017 020 021 064 <br /> Matrix Spike <br /> ' Duplicate <br /> % Recovery: 85 100 105 107 <br /> ' Relative <br /> % Difference, 57 49 00 16 <br /> SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relative%Drtference Conc of M S -Conc of M S D x 100 <br /> JoPect r a (Conc of M S + Conc of M S D) 2 <br /> Manager 1123903 WAT <5> <br />