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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364 9233 <br /> " 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988%73 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (9t6) 921-%W FAX(916)921 0100 <br /> i <br /> Canonie Environmental Client Project ID 94-331 Holt Brothers <br /> 1710 Main Street- - Matrix Liquid <br /> Escalon, CA 95320 <br /> Attention John Lane Work Order# 9503M73-04 Reported Apr 17, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#. GCO40795BTEX06A GCO40795BTEX06A GCO40795BTEX06A GCO40795BTEX06A <br /> Analy Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> -Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. T Granicher T Granicher T Granicher T Granicher <br /> MS/MSD#: 9503MB317 9503MB317 9503MS317 95MM8317 <br /> Sample COnc - N D N D N D N D <br /> Prepared Date 4/7/95 4/7/95 4/7/95 4/7/95 <br /> Analyzed Date 4/7/95 4/7/95 4/7/95 4/7/95 <br /> Instrument I D # GCHP6 GCHP6 GCHP6 GCHP6 <br /> Conc Spiked 10 pg/L 10 Ftg/L 10 pg/L 30 Ng/L <br /> Result 85 83 83 24 <br /> MS %Recovery 85 83 83 8o <br /> iDup Result 92 90 90 27 <br /> MSD % Recov .. 92 90 90 90 <br /> RPD 79 81 81 12 <br /> RPD Limit. 0.50 0-50 0-50 0-50 <br /> LCS#. - - - <br /> Prepared Date- - - - <br /> Analyzed Date: - - <br /> Instrument I.D.#: - - - <br /> Conc. Spiked: - - - <br /> LCS Result: - - - <br /> LCS % Recov.- - - - <br /> LCS 71-133 72-128 72-130 71-120 <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 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 H <br /> �w&CUL the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark <br /> Project Manager '*MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Ehfference 9503M73 CAN <3> <br />