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JLgU01a 680 Chesapeake Drive Redwood City-CA 94063 � <br /> p t(415) 3b4-9600 �FAX{4lS} 364 9333 <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX(5 10) 686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 1 (9 16) 921 9600 FAX(916) 92f 0100 <br />* Geocon Client Project ID 58080-06-02/South Hutchins St , Lodi, CA <br />' 1,1333 Sunco Dr , Suite 100 Matrix Soli <br /> Rancho Cordova, CA 95742 "i <br /> Attention Rick Walls QC Sample Goup 4110489-499 Reported Nov 29, 1994' il,'i <br /> I 1 <br /> ! QUALITY CONTROL DATA REPORT <br /> 1 <br /> _ <br /> ANALYTE Ethyl- + <br /> Benzene Toluene Benzene Xylenes Diesel + <br /> + <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Analyst N Zahedi N Zahedi N Zahedi N Zahedi C Lee <br /> j Concentration <br /> " Spiked 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg 7 5 mg/Kg <br /> LCS Batch# LCS112394 LCS112394 LCS112394 LCS112394 LCS 111494 Eel! <br /> � 9 <br />' Date Prepared 11/23/94 11/23/94 11/23/94 11/23/94 11/14/94 <br /> Date Analyzed 11/23/94 11/23/94 11/23/94 11/23/94 11/15/94 <br /> Instrument I D # GCHP 1 GCHP 1 GCHP 1 GCHP 1 GCHP 38 <br /> LCS '/° <br /> Recovery 109 108 108 112 112 <br /> Control Limits 75-125 75 125 75 125 75-125 60-130 <br /> MS/MSD <br /> Batch # 4110370 4110370 4110370 4110370 4110524 <br /> Date Prepared 11/22/94 11/22/94 11/22/94 11/22/94 11/14/94 <br /> Date Analyzed 11/23/94 11/23/94 11/23/94 11/23/94 11/17/94 <br /> Instrument I D # GCHP-s GCHP 1 GCHP-1 GCHP,l GC:HO-38 <br />' Matrix Spike <br /> % Recovery 96 96 95 98 <br /> Matrix Spike , <br /> Duplicate % 1 <br /> Recovery 92 93 90 95 <br /> ow i <br /> �1 <br /> Relative % <br /> Difference 4 3 3 2 54 31 <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 /> } L� preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> f"T 1 validation of sample batch results Due to matrix effects the CC limits for MS/MSD's are advisory only 1 <br /> Jeri se Hi <br /> ggi <br /> ns and are not used to accept or refect batch results *Matrix interference <br /> t Project Manager 4110489 GEC <6> <br /> 1 , <br />