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4 <br /> Sequoia U 680 Chesapeake Drive Redwood City,CA 9,'` 1 (415) 364.9600 FAX(415) 364-9233 <br />{ i 404 N.Wiget Lane Walnut Creek,CA 94 (510) 988.9600 FAX(510)988.9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921-0100 <br /> Touchstone Developments ,; Client Project ID: 9-1452, Chevron 9-1452 <br />{ 5807 Balboa Drive Matrix: Solid <br /> Oakland, CA 94811 <br /> Re <br /> Attention: Robert Mallory Work Order#: 9509J53-01, 02 Reported: Oct 13, 1995....., .;.:: <br /> EI QUALITY CONTROL DATA REPORT <br /> Analyte: 2,4-Dinitro- Pentachloro- Pyrene t <br /> toluene' phenol ] <br /> QC Batch#: M80928958270EXB MS0928958270EXB MS0928958270EXB <br /> Analy. Method. EPA 8270 EPA 8270 EPA8270 <br />{ <br /> Prep. Method. EPA 3550 EPA 3550 EPA 3550 <br /> Analyst: B. Pitamah _ B.Pitamah B. Pitamah <br /> MS/MSD#: 9509H5901 9509H5901 9509H5901 <br /> Sample Cone:: N.D. N.D. N.D. <br /> t Prepared Date: 9/28/95 9/28/95 9/28/95 <br /> Analyzed Date: 9/28/95 '9/2E/95 9/28/95 <br /> Instrument I.D.#: F4 F4 F4 <br /> Conc. Spiked: 3300 Ng/i g 3300frg/Kg 3300pg/Kg <br /> Result- 2200 1800 1900 <br /> MS %Recovery: 67 55 58 <br /> Dup. Result: 2200 € 1800 2000 <br /> MSD %Recov.- 67 55 61 <br /> RPD: 0.0 0.0 5.1 <br /> RPD Limit: 0-50 0-50 0-50 <br /> X. <br /> ........... <br /> LCS # <br /> Prepared Date: <br /> Analyzed Date: <br /> Instrument I.D.#: <br /> Conc. Spiked: <br /> a <br /> u <br /> LCS Result: <br /> LCS % Recov.: <br /> MS/MSD <br /> r <br /> LCS 39-139'1 14-176 52-115 <br /> :i <br /> Control Limits 0 <br /> Please Note: <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SE(?601A ANALYTICAL 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. K <br /> { " the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> r `I interference,the LCS recovery is to be used to validate the batch. <br /> Mar J Cargasacchi MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager;; Page 3 of 3 9509J53.TTT <5> <br /> - _.J <br />