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Sequoia 49 go 404 <br /> N. , CA Lane <br /> t Creek, CA 94598 <br /> 195)- (925)Analytical FAX 988-9600 <br /> (925)988-9673 <br /> Roy F..Weston,1. <br /> nc. Client Project ID: Home Depot, Tracy <br /> 2300 Clayton Rd., Ste 1580 Matrix: Liquid <br /> Concord, CA 94520 <br /> Attention: Scott Lookingbill QC Sample Group: 9050775-777 Reported: Jun 2, 1999:.11 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: 1,1-Dichloroethene Trichloroethene Benzene Toluene Chloro- <br /> benzene <br /> QC Batch#: MS051999 MS051999 MS051999 MS051999 MS051999 <br /> 8260S2A 8260S2A 8260S2A 8260S2A 8260S2A <br /> Analy. Method: EPA 8260 EPA 8260 EPA 8260 EPA 8260 EPA 8260 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: N. Nelson N.Nelson N. Nelson N.Nelson N.Nelson <br /> MS/MSD #: 9050523 9050523 9050523 9050523 9050523 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 5/19/99 5/19/99 5/19/99 5/19/99 5/19/99 <br /> Analyzed Date: 5/19/99 5/19/99 5/19/99 5/19/99 5/19/99 <br /> Instrument I.D.#: GC/MS-2 GC/MS-2 GC/MS-2 GC/MS-2 GC/MS-2 <br /> Conc. Spiked: 50 Ng/L 50 Ng/L 50 Ng/L 50 Ng/L 50 Ng/L <br /> Result: 35 49 49 51 51 <br /> MS %Recovery: 70 98 98 102 102 <br /> Dup. Result: 34 48 48 49 49 <br /> MSD % Recov.: 68 96 96 98 98 <br /> RPD: 2.9 2.1 2.1 4.0 4.0 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS #: LCS051999 LCS051999 LCS051999 LCS051999 LCS051999 <br /> Prepared Date: 5/19/99 5/19/99 5/19/99 5/19/99 5/19/99 <br /> Analyzed Date: 5/19/99 5/19/99 5/19/99 5/19/99 5/19/99 <br /> Instrument I.D.#: GC/MS-2 GC/MS-2 GC/MS-2 GC/MS-2 GC/MS-2 <br /> Conc. Spiked: 50Ng/L 50Ng/L 50Ng/L 50pg/L 50Ng/L <br /> LCS Result: 35 50 50 52 51 <br /> LCS % Recov.: 70 100 100 104 102 <br /> ILCS 65-135 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note: <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL,#1271 preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure. If <br /> v:�,�.� % the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recover is to be used to validate the batch. <br /> lianne Fegley **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager <br /> 9050775.RFW <17> <br />