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Sequoia 680 Chesapeake Dnve Redwood City Ca 94063 (415) 364-9600 FAX(4t5) 364-9233 <br /> IN 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> 1WAnalytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> v +y +r x <br /> Delta irnvirgnmental Consiaftants"� Client l5r`x3ject ID toxon#7-3708, Stocktan,+CA�� w Y{ }r W <br /> 3164 Gold Camp Dr, Suite 200 Matrix Water <br /> Rancho Cordova, CA 95670 <br /> Attention C Keoni Almeida QC Sample Group 6101116-23 Reported Oct 30, 1996 <br /> v . + f .. ` .... 0.24~n r 1r x .Gh r •• ., v . .h.-y..n.�v�%t+G rw('r ,. `F v t ` " .S .-vv i .n w. .- 6 + <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xytenes <br /> Method: EPA 8020 EPA 6020 EPA 8020 EPA 8020 <br /> Analyst: 8 Williams B Williams B Williams 8 Williams <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch# LCS102496 LCS102496 LCS102496 LCS102496 <br /> Date Prepared- 10/24/96 10/24/96 10/24/96 10/24/96 <br /> Date Analyzed: 10/24/96 10/24/96 10/24/96 10/24/96 <br /> Instrument I.D.#- GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> LCS % <br /> Recovery' 92 99 94 95 <br /> Control Limits. 70-130 70-130 70.130 70-130 <br /> + r ♦+n ' vv r v+C + h r r x+vr`v r + `-?+ ~'�-+++ n..xn}n x+ . + +,C " ` nn♦nnv1+ vv+•n r♦+2+n <br /> MS/MSD <br /> Batch#- 5101116 6101116 6101116 6101116 <br /> Date Prepared: 10/24/96 10/24/196 10/24/96 10/24/96 <br /> Date Analyzed: 10/24/96 10/24/96 10/24/96 10/24/96 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matrix Spike <br /> %Recovery- 96 94 94 94 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery- 82 86 82 82 <br /> Relative % <br /> Difference- 16 89 14 14 <br /> SEQUOIA ANALYTICAL Please Note <br /> . The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents <br /> c9AP4 M 6e- C V&)89preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> FOFL validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> Linda C Schneider and are not used to accept or refect batch results <br /> Project Manager/Sacramento Laboratory <br /> Qq 6101116 DLT <5> <br /> �Sd' <br />