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Sequoia 680 Chesapeake Dnve Redwood City C4 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wigct Lane Walnut Creek C4 94598 (510) 988 9600 FAX(510)988 9673 <br /> �l Analytical a19 Strike,Avenuc,Suite 8 Sacramento CA 95834 (916) 92t 9600 FAX (916) 921 0100 <br /> a, <br /> Pacific Environmental Group, Inc Client Protect ID Arco 2133, Stockton <br /> 11315 Sunrise Gold Circle, #M Matrix Water <br /> Rancho Cordova CA 95742 <br /> Attention Greg Barclay QC Sample Group 6031010-25 Reported Apr 3, 1996 <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 CL/BW CL/BW CL/BW CL/BW <br /> Concentration <br /> Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch# LCS032796 LCSO32796 LCS032796 LCS032796 <br /> Date Prepared- 03/27/96 03/27/96 03/27/96 03/27/96 <br /> Date Analyzed. 03/27/96 03/27/96 03/27/96 03/27/96 <br /> Instrument I D #. GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS % <br /> Recovery: 98 99 95 97 <br /> Control Limits 75-125 75-125 75-125 75-125 <br /> v4 k v f i R s r r r r {^ n+ 'nv d+rv^Y•`�Ynnvr n r r'2"' a. <br /> r x a .+ r +aixv n v x+}ate+vi r, r i\4+y+ ..r.}v�,} rm+•mlti•.a vnrh Ja~ir.`n`r r " .x+.a.,`,.wn Army ti•.r nr r by�'id4?etrs-k.,Os xr`v <br /> MS/MSD <br /> Batch # 6031093 6031093 6031093 6031093 <br /> Date Prepared, 03/27/96 03/27/96 03/27/96 03/27/96 <br /> Date Analyzed 03/27/96 03/27/96 03/27/96 03/27/96 <br /> Instrument I D # GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> % Recovery. 86 93 94 98 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 90 97 94 97 <br /> Relative% <br /> Difference, 22 42 00 10 <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS 1s a control sample of known,interferent free matrix that 1s analyzed using the same reagents, <br /> �� L� preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects,the QC limits for MS/MSD s are advisory only <br /> Linda C Se el er and are not used to accept or reject batch results <br /> Protect Manager/Sacramento Laboratory <br /> 6031010 PES <7> <br />