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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364-9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94.598 (510) 988-9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> ;s <br /> t�elta rmnvlronmental Consultants Client Project 10 I xxon #7-3708, Stockton, CA <br /> 3164 Gold Camp Dr, Suite 206 Matrix Water <br /> Rancho Cordova, CA 95670 ` <br /> Attention C Keoni Almeida QC Sample Group 7020304-11 Reported Feb 20, 1997 r <br /> v f x„ v �• �'L:x.c P* {! '^{~i.2 R��nra .G4+v�!J }}rr mow.. sun]N}s:v +x}a"+ r ! :x x 4 <br /> I <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene X enes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst. B Williams B Williams B Williams B Williams <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch# LCS021297 LCS021297 LCS021297 LCS021297 <br /> Date Prepared: 02/12/97 02/12/97 02/12/97 02/12/97 <br /> Date Analyzed: 02/12/97 02/12/97 02/12/97 02/12/97 <br /> Instrument I D # GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> LCS % <br /> Recovery, 102 103 106 107 <br /> Control Limits: 70.130 70-130 70-130 70-130 <br /> {• ` ... . ,. ., ..4,. . -r 1,- .. ,,,vn +m n l� �an e rs.,.�` !+a"e^",.£^' '{^'` f {r r ,.r r. x n r <br /> MS/MSD <br /> Batch#- 7020304 7020304 7020304 7020304 <br /> Date Prepared 02/12/97 02/12/97 02/12/97 02/12/97 <br /> Date Analyzed- 02/12/97 02/12/97 02/12/97 02/12/97 <br /> Instrument I.D.#- GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matnx Spike <br /> % Recovery- 100 102 101 102 <br /> Matnx Spike <br /> Duplicate % <br /> Recovery: 100 101 103 102 <br /> Relative % <br /> Difference: 00 0 98 20 00 <br /> SEQUOIA ANALYTICAL Please Note <br /> 10The LCS is a control sample of known,interferent free matnx that is analyzed using the same reagents,9a <br /> ,yCh <br /> � <br /> G��ri 5/ preparation and anafytical methods employed!or the samples The LC5 recovery data is used far <br /> lz&, , validation of sample batch results Due to matnx effects,the CC limits for MS/MSD's are advisory only <br /> Linda Cneider and are not used to accept or refect batch results <br /> Project Manager/Sacramento Labors ory <br /> 7020304 OLT <3> <br />