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41) Sequoia 680 Chcsapcake Drive Redwood City, CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510) 98R 9673 <br /> tr�ll� Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> GettlerlRyan%Geostrategies Client Project ID Chevron 9-1848,VManteca <br /> 1j3164 Gold Camp Drive, #240 Matrix Solid <br /> Rancho Cordova, CA 95670 <br /> ,kAttentlon Greg Gurss Work Order# 9708G33-01-08 <br /> w. Reported Sep 11, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloroethene Trichloroethene Benzene <br /> Toluene Chloro- <br /> QC Batch# MS0903978260EXA MS0903978260EXA MS0903978260EXA MS0903978260EXAbenzene <br /> Analy. Method. EPA 8260 EPA 6260 EPA 8260 MS0903978260EXA <br /> Prep Method N A EPA 8260 EPA 8260 <br /> NA NA NA NA <br /> Analyst L Duong L Duong L Duong L Duon <br /> MS/MSD#- 9708CJ601 9708C1601 970SC1601 0 L Duong <br /> Sample Cone - N D 970801601 ND IVD 970801601 <br /> ND <br /> Prepared Date' 9/3/97 ND <br /> 9/3/97 9/3/97 9/3/97 <br /> Analyzed Date- 9/4/97 9/4/97 9/4/97 9/3/97 <br /> Instrument 1 D #- F3 F3 9/4/97 s/4/s7 <br /> F3 F3 F3 <br /> Cone Spiked 2500ug/Kg 2500 ug/Kg 2500 <br /> ug/K9 2500!►g/K9 250a N9/K9 <br /> Result 2400 2500 2900 2800 <br /> MS % Recovery. 962600 2600 119 112 104 <br /> Dup Result. 2400 2500 3000 <br /> MSD % Recov 96 2800 2600 <br /> 100 120 112 <br /> 104 <br /> RPD: 00 00 34 <br /> RPD Limit 0-25 °° 00 <br /> 0 25 0-25 0-25 <br /> 0-25 <br /> % I r r rn i r v wr y n O•' y r t ♦ r <br /> LCS # BLK090597 BLK090597 BLK090597 BLK090597 > <br /> BLK090597 <br /> Prepared Date 9/5/97 9/5/ <br /> 97 <br /> Analyzed Date 9/7/97 9/797 9/7/97 s/5/97 9/5/97 <br /> Instrument I D # F3 / / 9/7/97 9/7/97 <br /> F3 F3 F3 <br /> Cone Spiked- 2500 ug/K9 2500 pg/Kg 2500 ug/Kg 2500ug/Kg 2500,u <br /> u9/K9 <br /> LCS Result 2400 2300 25x0 2400 <br /> LCS /o Recov - 96 92 1002300 <br /> 96 92 <br /> 60-140 60-140 60-140 60-140 <br /> =Control <br /> 65-135 70-130 70130 60140 <br /> ts 70-130 70 130 <br /> Please Nate <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> "EQUOI ALYTiCAL preparation,and analytical methods employed for the samples The matrix spike 1s an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limas due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Gregory *MS=Matrix Spike, MSD=MS Duplicate,RPU=Relative%Difference <br /> Project Manager <br /> 9708G33 GET <2> <br />