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EY ASSCka' <br /> LOM <br /> SEQUOIA ANALYTICAL I <br /> I 1 19'I'd 13 <br /> 680 Chesapeake Drive * Redwood City, CA 94063 NOV 2 <br /> (415) 364-9600 FAX(415) 364-9233 RECENED <br /> ..... ......... <br /> Aisociates :::Client Project ID: 80 0-113A —'x...... <br /> '$�x:405 Clyde Avenue Matrix: Soil <br /> ,,.,Mountain View, CA 94043 <br /> ':'-.'-Attention: Belinda Peters QC X Sample Group:..4::.::...::.,.:...............3JB5201 Reported: Oct 28, 1993 <br /> ....................... <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 1,1-Dichloroethene Trichloroethene Chloro- Benzene Toluene Ethyl Xylenes <br /> benzene benzene <br /> Method: EPA 8010 EPA 8010 EPA 8010 EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: B.Samra B.Samra B.Samra A.Maralit A.Maralit A.Maralit A.Maralit <br /> Cone. Spiked: 25 25 25 0.20 0.20 0.20 0.60 <br /> Units: yg/kg ug/kg jug/kg mg/kg mg/kg mg/kg mg/kg <br /> LCS Batch#: VBLK101893 VBLK101893 VBLK101893 GBLK102293 GBLK102293 GBLK102293 GBLK102293 <br /> Date Prepared: 10/18/93 10/18/93 10/18/93 10/22/93 10/22/93 10/22/93 10/22/93 <br /> Date Analyzed: 10/20/93 10/20/93 10/20/93 10/22/93 10/22/93 10/22/93 10/22/93 <br /> Instrument I.D.#: GCHP-9 GCHP-9 GCHP-9 GCHP-6 GCHP-6 GCHP-6 GCHP-6 <br /> LCS % <br /> Recovery: 104 108 96 105 100 105 102 <br /> Control Limits: 59-172 62-137 60-133 60-140 60-140 60-140 60-140 <br /> ............................... .. .......... <br /> x............... ------ <br /> 'x, <br /> MS/MSD <br /> Batch#: V3J79701 VW79701 VW79701 G3JA1307 G3JA1307 G3JA1307 G3JA1307 <br /> Date Prepared: 10/18/93 10/18/93 10/18/93 10/22/93 10/22/93 10/22/93 10/22/93 <br /> Date Analyzed: 10/20/93 10/20/93 10/20/93 10/22/93 10/22/93 10/22/93 10/22/93 <br /> Instrument I.D.#: GCHP-9 GCHP-9 GCHP-9 GCHP-6 GCHP-6 GCHP-6 GCHP-6 <br /> Matrix Spike <br /> %Recovery: 104 116 100 100 100 100 97 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 88 108 88 105 105 105 102 <br /> Relative% <br /> Difference: 17 7.1 13 4.9 4.9 4.9 5.0 <br /> SEQUOIA ANALYTICAL Please Note: <br /> The LOS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples. The LOS%recoverydata is used for <br /> Maile A Springer 7afifttion of sample batch results. Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results. <br /> Project <br /> Manager 3JB5201.JVL <5> <br />