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--Sequoia 680 Chesapeake Drive Redwood Cdy CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> ���•� k900 Batcs Avenuc Suite L Concord CA 94520 (510) 686 9600-- FAX(510)686 9689 "z <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Geocon , Client Project ID 305 S Hutchins <br /> 3235 Sunrise Blvd , Suite 6 Matrix Water <br /> Rancho Cordova, CA 95742 <br /> Attention Richard Walls OC Sample Goup 4120022-27 Reported Dec 8, 1994 <br /> I r <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- , r <br /> Benzene Toluene Benzene Xylenes Diesel <br /> I <br /> I I EPA , <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 8015 Mod <br /> Analyst C Lee C Lee C Lee C Lee - C Lee <br /> Concentration <br /> Spiked 10,ug/L 10 ug/L 10 ug/L 30 ug/L 300 ug/L <br /> LCS Batch# " LCS120594 LC8120594 LCS120594 LCS120594 LCS120294 a " <br /> a � <br /> Date Prepared 12/5/94 12/5/94 12/5/94 12/5/94 12/2/94 <br />' Date Analyzed 12/5/94 12/5/94 12/5/94 12/5/94 12/2/94 <br /> Instrument I D # GCHP-2 GCHP-2 GCHP-2 GCHP 2 GCHP-3B <br /> r ' <br /> LCS % <br /> Recovery, 102 100 102 102 97 <br /> Control Limits. 75-125 75-125 75-125 75.125 60-130 <br /> MS/MSD <br />' Batch#, 4120022 a �m „ 4120022 v 4120022 4120022 BLK120294 z <br /> Date Prepared. 12/5/94 12/5/94 12/5/94 12/5/94 12/2/94 <br /> Date Analyzed, 12/5/94 1 12/5/94 12/5/94 12/5/94 12/2/94 <br /> Instrument I.D # GCHP-2, GCHP-2 GCHP-2 GCHP-2 GCHP-3B <br /> Matrix Spike <br />' % Recovery, 110 98 98 98 97 " <br /> I <br /> I 1 Matrix Spike ' <br /> Duplicate% ' <br /> Recovery: 110 95 93 93 105 <br /> 1 <br /> Relative% lii 1 i <br /> Difference: i 00 ` 311 52 52 79 oil <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 /> (I�9yr preparation and analytical methods employed for the samples The LCS%recovery data is used for ' <br /> JUd � <br /> validation of sample batch results Due to matrix effects,the QC limits for M5/M5D's are advisory only � <br /> Jennie Higgins and are not used to accept or reject batch results <br /> Project Manager <br /> ' 4120022 GEC <9> <br /> 1 <br /> I <br />