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81liVthesapeake Drive Redwood City.CA 94%0 (650)364-9600 FAX(650)364-9233 <br /> / Sequoia 404 N.Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)9889673 <br /> 819 Stoker Avenue,Suite 8 Sacramento.CA 95834 (916)921-9600 FAX(916)921-0100 <br /> �lil� Analytical 1455 McDowell Blvd.North.Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos.CA 94070-41 1 1 (650)232-9600 FAX(650)232-9612 <br /> Secor Client Project ID: Arco # 434, Lodi <br /> 9912 Business Park Dr., Ste 100 Matrix: Solid <br /> - Sacramento, CA 95827 <br /> Attention: Rusty Benkosky CC Sample Group: 9061819-824 Reported: Jun 24, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Tcluene Ethyl Xylenes Lead <br /> Benzene <br /> QC Batch#: SP062399 SP062399 SP062399 SP062399 ME062399 <br /> 8020EXA 8020EXA 8020EXA 8020EXA 3050MDB <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 7420 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 3050 <br /> Analyst: D.Newcomb D.Newcomb D.Newcomb D.Newcomb T.Le <br /> MS/MSD #: 9061819 9061819 9061819 9061819 9061819 <br /> Sample Cone.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 6/23/99 6/23/99 6/23/99 6/23/99 6/23/99 <br /> Analyzed Date: 6/23/99 6/23/99 6/23/99 6/23/99 6/24/99 <br /> instrument I.D.#: HP-4 HP-4 HP-4 HP-4 MV-1 <br /> Cone. Spiked: 0.80 mg/Kg 0.80 mg/Kg 0.80 mg/Kg 2.4 mg/Kg 50 mg/Kg <br /> Result: 0.80 0.67 0.70 2.3 50 <br /> MS%Recovery: 100 84 88 96 100 <br /> Dup. Result: 0.78 0.66 0.69 2.3 44 <br /> MSD% Recov.: 98 83 86 96 88 <br /> RPD: 2.5 1.5 1.4 0.0 13 <br /> RPD Limit: 0-20 0-20 0-20 0-20 0-20 <br /> LCS#: 4LCS062399 4LCS062399 4LCS062399 4LGS062399 LCS062399 <br /> Prepared Date: 6/23/99 6/23/99 6/23/99 6/23/99 6/23/99 <br /> Analyzed Date: 6/23/99 6/23/99 6/23/99 6/23/99 6/24/99 <br /> Instrument I.D.#: HP4 HP-4 HP-4 HP-4 MV-1 <br /> Cone. Spiked: 0.80 mg/Kg 0.80 mg/Kg 0.80 mg/Kg 2.4 mg/Kg So mg/Kg <br /> LCS Result: 0.69 0.59 0.62 2.1 48 <br /> LCS %Recov.: 86 74 78 88 96 <br /> LCS 50-150 50-150 50-150 50-150 80-120 <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 /> ,aA/ ,'nt// the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recove is to be used to validate the batch. <br /> Dimple Sharma •'MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%umerence <br /> Project Manager <br /> 9061819.SSS <3> <br /> .P7. <br />