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1 1 <br /> Se UOia 680 Cbesapcake Drive Redwood City CA 94063 (415) 364 9600 FAXi(415) 364 9233 <br /> 1900 Bates Avenue Suit L Concord CA 94520 - (510) b85 9606' FAX(5 10) 686 9689 <br /> X117 Analytical A 19 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Geocon Client Project ID 58080-06-02 I <br /> 11333 Sunco Or, Suite 100 Matrix Soil <br /> Rancho Cordova, CA 95742 <br /> Attention Steve Greenfield QC Sample GOUP 4110826, 830-833 Reported Dec 2, 11994" " <br /> " <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- + <br /> Benzene Toluene Benzene Xytenes Diesel <br /> Method- FPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Analyst C Chapman C Chapman C Chapman C Chapman C Lee <br /> Concentration <br /> Spiked 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg 7 5 mg/Kg <br /> 1 � <br /> LCS Batch# LCS 112494 LCS112494 LCS112494 LCS 112494 LCS112294 <br /> Date Prepared 11/24/94 11/24/94 11/24/94 11/24/94 11/22/94 <br />' Date Analyzed 11/24/94 ,11/24/94 11/24/94 11/24/94 11/23/94 ; <br /> Instrument I D #• GCHP-2 GCHP-2 GCHP-2 GCHP 2 GCHP-3B <br /> LCS % <br />& Recovery' 100 92 101 100 93 <br /> Control Limits" 75-125 75-125 75-125 75-125 60-130 <br /> MS/MSD <br />' Batch# 4110831 4110831 4110831 4110831 4110845 <br /> Date Prepared• , 11/24/94 11/24/94 11/24/94 11/24/94 11/22/94 <br />' Date Analyzed: 11 /24/94 11/24/94 11/24/94 11/24/94 11/23/94 <br /> Instrument I.D # GCHP-2 GCHP-2 GCHP 2 GCHP-2 GCHP-3B <br /> Matrix Spike <br />' %Recovery* 100 90 100 100 100 <br /> i <br /> Matrix Spike ; <br /> Duplicate% <br /> Recovery' 100 95 100 98 92 <br /> i it !I <br /> Relative% <br /> nYil""uI�N ," 1 <br /> Difference: , o o 54 00 20 63 <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 /> q <br /> ,v�„�u,, preparation and analytical methods employed for the samples The LCS 6 recovery data is used for <br /> UU ((]] validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> Jennie Higgins I i and are not used to accept or reject batch results <br /> Project Manager <br /> I I 4110830GEC a6> <br /> 1 1 1 <br /> it <br /> i <br />