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03/23/98 MON 18:37 FAX 916 858 0605 IT Corporation/RC IflD10 <br /> Sequoia 6e0 Chettpeake Dove Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9333 <br /> 404 N.V flet Lace Walnut Creek,CAA 94598 (510) 989-96M FA$(510)gas-9673 <br /> ��► Analytical a19 Striker Avenue,Suite 8 SZCMMentD,CA 95934 (916) 911-9600 FAX(916)911-0100 <br /> ✓Z?°.!".A &`N'A3Et"",';.!'.3`3 'Al`sib$'.t('S.fa,:',R'a'�S"sb':"ile .�i.°S'.�PYk�A.. b.e>YAt $.!fix:iY4:.d�t?:,%'>'E;SB$.'i3JK.i�.'ld���:"IISts1'l'S. <br /> 3 Pae c iwironmentia roup Client Project 0. Unca athrop, A <br /> g 11315 Sunrise Gold Circle, Ste. M Matrix: Soil <br /> Rancho Cordova, CA 95742 <br /> ,,,Attention: Rusty Benkosky QC Sample Group 7110397.04.02 Reported: Dec 3. 1997 <br /> S <br /> DUALITY CONTROL DATA REPORT <br /> KNALYTE Ethyl. <br /> Benzene Toluene Benzene Xylan <br /> Method: EPA 8020 FPA 8M EPA 8020 EPA 9020 <br /> Analyst: S.Phillips S.Phillips S.Phill(Pe S.Phillips <br /> Concentration <br /> Spiked: 0.20 mg/kg 0.20 rr>fl/ka 0.20 mg/kg 0.60 mg/kg <br /> LCS Batch,#: LCS111037 LCS 111697 LC5111897 LCS111897 <br /> Date Prepared: 11/16/97 11/18/97 11/18/97 11/18/97 <br /> Date Analyzed: 11/18/97 11/19/0/ 11/19/97 11/18/97 <br /> InStFurnent I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Lill <br /> Recovery: 109 101 97 93 <br /> Control Limits: 70-130 70-130 76.150 7a13o <br /> :53vw <br /> MS/MSD <br /> Batch#: 7110335 7113936 7110938 7110336 <br /> Date Prepared: 11/18/97 11/16/97 11/16/97 11/18/97 <br /> Date Analyzed; 11/18/97 11/18/97 11/19/97 11/18/97 <br /> IniAnumem LD_#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matrol Spike <br /> %Recovery: 104 98 94 94 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 102 94 92 Be <br /> Relative% <br /> DiNerence: 1.9 4.2 2.2 6-e <br /> SED U1 ANAAL Please <br /> The LCS is a conV01 sample DI known,InterNroM free melds that is analysed using the same reagents, <br /> �1 preparation and analytical methods employed for the samples, The LCS%recovery data is used for <br /> �L validation M sampla butch results, Due to maLdv en0cta,the OG limits for MS/MSD'a are advisory only <br /> *actSChnelder and are not used to accept or re)ect belch results. <br /> Matlager/Sacramento labora ory <br /> 71IDM7-PES a9n <br /> 1B <br />