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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364 9233 404 N Wiget lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988%73 Analytical a 19 Sinker Avenue,Suite a Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 Canonie Environmental Client Project ID 94-331 Holi Brothers 1710 Main Street - Matrix Liquid Escalon, CA 95320 Attention John Lane Work Order# 9503M73-01-3, 5 Reported Apr 17, 1995 QUALITY CONTROL DATA REPORT Analyte Benzene Toluene Ethyl Xylenes Benzene QC Batch# GCO40595BTEXo6A GC040595BTEX06A GCO40595BTEKOBA GCO40595BTEX06A Ana ly Method- EPA 8020 EPA 8020 EPA 8020 EPA 8020 Prep Method' EPA 5030 EPA 5030 EPA 5030 EPA 5030 Analyst- T Granicher T Granicher T Granicher T Granicher MS/MSD#. 950301405 950301405 950301405 950301405 Sample Cone.: N D N D N D N D Prepared Date 4/6/95 4/6/95 4/6/95 4/6/95 Analyzed Date. 4/6/95 4/6/95 4/6/95 4/6/95 Instrument I D #: GCHP6 GCHP6 GCHP6 GCHP6 Cone Spiked- 10 Ng/L- 10 ug/L. 10 ug/L 30 ug/L Result: 91 88 89 27 MS %Recovery: 91 88 89 90 . Dup. Result: 88 86 87 26 MSD % Recov.: 88 86 87 87 RPD: 34 23 23 38 RPD Limit 0-50 0-50 G-50 0-50 4 LCS # - - - Prepared Date - - - Analyzed Date. - - - - Instrument I.D.#: - - - - Cone Spiked - - - LCS Result - LCS% Recov : - - - LCS 71-133 72-128 72-130 71-120 Control Limits Please Note The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, . SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample fortified with known quantities of specific compounds and subjected to the entire analytical procedure If the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix interference,the LCS recovery is to be used to validate the batch Vickie Tague Clark Project Manager *"MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9503M73 CAN -c2>